his.sePublications
Change search
Refine search result
1234567 51 - 100 of 1609
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 51.
    Alvarez Díaz, María Guadalupe
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Wilhelmsson, Ulf
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Lebram, Mikael
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Toftedahl, Marcus
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Your Answer Will Make an Impression: Using Quiz Game Mechanics for the Collection of Visitor Data in a Museum2015In: VS-Games 2015: 7th International Conference on Games and Virtual Worlds for Serious Applications / [ed] Per Backlund, Skövde: IEEE Computer Society, 2015, p. 1-4Conference paper (Refereed)
    Abstract [en]

    This paper presents the initial results from a project that aimed to collect visitor data at a traveling exhibition starting at the Regional Museum in Kristianstad, Sweden during 2014-2016. The project was intended also to contribute to the creation of an atmosphere “About time”, which was the subject of the exhibit. We built a system that was integrated as an interactable part of the exhibition by using elements of quiz game mechanics in combination with elements of data based tracking applications and elements of visual art installations. The data provides statistics which are used to visualize the current status of the visitors’ attitude toward specific questions about time, imprinting the visitors themselves an integral part of the exhibition. Visitors build a visual Game Ego when answering questions and at the same time provided statistical data that can be monitored and extracted from the system. The results show that we succeeded to some degree but more can be done towards incorporating game design elements to engage the user, such as feedback and challenge.

  • 52.
    Alves, Thiago
    University of Skövde, School of Informatics.
    Exploring Underrepresented Narratives: Social Anxiety in Games2018Independent thesis Advanced level (degree of Master (One Year)), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    This research focuses on pushing forward the understanding of mental disorders portrayals in games, more specifically social anxiety, which still lies as a marginalized topic in this medium. In order to understand honest manifestations of social anxiety in games, the first step is to conduct a close reading of games made by people who suffer from this mental disorder. A collection of five indie games, all of autobiographical nature and featuring social anxiety as an important part of their text, was put together for this analysis. This was done embracing the need to address the representational complexity, in order to tap into such a nuanced and elusive topic as social anxiety, not to identify rights or wrongs, but to engage in a discussion of how experiences are represented in games by people directly affected by this mental disorder. Individual experiences also contribute to expand interpretations and to identify additional keys of social anxiety representation. This is done by reaching informants, people living with a comorbid mental illnesses or disorders, that face or had faced social anxiety, and assess their perspectives through an experiential workshop. This work intends to further explore the practice of game design as mediator of experiences, contributing to both deepen the knowledge of game design and explore nuances of individual experiences present in autobiographical games and how this relates to perspectives of other people living with social anxiety. By combining the games and informants perspectives it is possible to structure a debate about game design patterns based on the findings of the game analysis and further elaborated with the nuanced perceptions gathered from informants. The knowledge acquired through this work is a step towards understanding of how games can represent, in an honest and non-stereotypical way, mental disorders, starting with social anxiety and, hopefully, contribute to spark other studies to broaden the spectrum of how the complexity of adverse mental conditions can be more respectfully addressed in games.

  • 53.
    Amarante Teixeira de Freitas, Carina
    et al.
    University of Skövde, School of Technology and Society.
    Jarlsson, Ylva
    University of Skövde, School of Technology and Society.
    Utveckling av stol för café och lunchrum2007Independent thesis Basic level (degree of Bachelor), 15 points / 22,5 hpStudent thesis
    Abstract [en]

    This is a dissertation for a Bachelor Degree Project at the University of Skövde. The project is carried out in cooperation with the company Kinnarps AB.

    The objective of this project was to develop a new chair for café and lunch rooms, which should satisfy the markets expectations and demands and match Kinnarps AB’s assortment today. The project has contained everything from identification of user and customer needs and requirements to evaluation and building of a prototype.

    The result is a chair with a frame of tubular steel and there is nothing like it in Kinnarps AB’s assortment today. The chair has a frame of tubular steel and separate seat and backrest, just like the chairs Jig and Tango as it is intended to replace. The chair’s extraordinary characteristics are that the shape of the backrest enables a good grip and the motion which encourages variation in sitting postures. The motion is new for this kind of chair both in Kinnarps AB’s assortment as well as on the market.

    The product development process is an iterative process which can be described with the activities: identification of customer requirements, product design specification, initiation of concept solutions, evaluation, embodiment design and detail design. Knowledge about the customer requirements and needs is fundamental to a successful product. The result of the market research showed that the new chair should be a comfortable and inviting chair which is lightweight and simple with a timeless design and organic shape. It also came to our knowledge that it is very important that the chair is stackable, possible to hang on a table and linkable.

    Different researchers’ literatures have been studied and an analysis has been made in SAMMIE to ensure that the chair has good ergonomics. This is a very important quality but often an unspoken requirement that is taken for granted.

    The result was carefully evaluated during and after the building of the prototype. Kinnarps AB will also make further analysis and quality tests.

    This project has hopefully resulted in a chair with good quality and a potential to participate in the competition on the market.

  • 54.
    Amenabar, Leire
    et al.
    University of Skövde, School of Engineering Science.
    Carreras, Leire
    University of Skövde, School of Engineering Science.
    Augmented Reality Framework for Supporting and Monitoring Operators during Maintenance Operations in Industrial Environments2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In an ever-changing and demanding world where short assembly and innovation times are indispensable, it is of paramount importance to ensure that the machinery used throughout the whole process of a product are in their best possible condition. This guarantees that the performance of each machine will be optimal, and hence, the process times will be the shortest possible, while the best quality products are obtained. Moreover, having a machine in an impeccable status permits making the necessary changes to it, in order to fulfil the requirements that a more advanced or complex product may have. Maintenance operations and their corresponding trainings have historically been time-consuming, and a vast amount of information has been transmitted from an expert to a newer operator. This means that there has been the need of working with experienced operators to secure that a good service is provided. However, different technologies like augmented reality (AR) have been shown to have a positive impact in the support and monitoring of operators in industrial maintenance operations.The present project gathers information in regard to the framework of AR, with the aim of supporting and monitoring operators in industrial environments. The proposed method consists on the development of an artefact, which would lead to a possible improvement of the already existing solutions. It is believed that the development of an AR application could grant the necessary aid to any operator in maintenance operations. The result of this suggestion is an AR application which superimposes visual information on the physical equipment.

  • 55.
    Amouzgar, Kaveh
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Metamodel Based Multi-Objective Optimization with Finite-Element Applications2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    As a result of the increase in accessibility of computational resources and the increase of computer power during the last two decades, designers are able to create computer models to simulate the behavior of complex products. To address global competitiveness, companies are forced to optimize the design of their products and production processes. Optimizing the design and production very often need several runs of computationally expensive simulation models. Therefore, integrating metamodels, as an efficient and sufficiently accurate approximate of the simulation model, with optimization algorithms is necessary. Furthermore, in most of engineering problems, more than one objective function has to be optimized, leading to multi-objective optimization(MOO). However, the urge to employ metamodels in MOO, i.e., metamodel based MOO (MB-MOO), is more substantial.Radial basis functions (RBF) is one of the most popular metamodeling methods. In this thesis, a new approach to constructing RBF with the bias to beset a priori by using the normal equation is proposed. The performance of the suggested approach is compared to the classic RBF and four other well-known metamodeling methods, in terms of accuracy, efficiency and, most importantly, suitability for integration with MOO evolutionary algorithms. It has been found that the proposed approach is accurate in most of the test functions, and it was the fastest compared to other methods. Additionally, the new approach is the most suitable method for MB-MOO, when integrated with evolutionary algorithms. The proposed approach is integrated with the strength Pareto evolutionary algorithm (SPEA2) and applied to two real-world engineering problems: MB-MOO of the disk brake system of a heavy truck, and the metal cutting process in a turning operation. Thereafter, the Pareto-optimal fronts are obtained and the results are presented. The MB-MOO in both case studies has been found to be an efficient and effective method. To validate the results of the latter MB-MOO case study, a framework for automated finite element (FE) simulation based MOO (SB-MOO) of machining processes is developed and presented by applying it to the same metal cutting process in a turning operation. It has been proved that the framework is effective in achieving the MOO of machining processes based on actual FE simulations.

  • 56.
    Amouzgar, Kaveh
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Bandaru, Sunith
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Andersson, Tobias J.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ng, Amos H. C.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    A framework for simulation based multi-objective optimization and knowledge discovery of machining process2018In: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 98, no 9-12, p. 2469-2486Article in journal (Refereed)
  • 57.
    Amouzgar, Kaveh
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Bandaru, Sunith
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Andersson, Tobias J.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ng, Amos H. C.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Metamodel based multi-objective optimization of a turning process by using finite element simulationArticle in journal (Refereed)
    Abstract [en]

    This study investigates the advantages and potentials of the metamodelbased multi-objective optimization (MOO) of a turning operation through the application of finite element simulations and evolutionary algorithms to a metal cutting process. The objectives are minimizing the interface temperature and tool wear depth obtained from FE simulations using DEFORM2D software, and maximizing the material removal rate. Tool geometry and process parameters are considered as the input variables. Seven metamodelling methods are employed and evaluated, based on accuracy and suitability. Radial basis functions with a priori bias and Kriging are chosen to model tool–chip interface temperature and tool wear depth, respectively. The non-dominated solutions are found using the strength Pareto evolutionary algorithm SPEA2 and compared with the non-dominated front obtained from pure simulation-based MOO. The metamodel-based MOO method is not only advantageous in terms of reducing the computational time by 70%, but is also able to discover 31 new non-dominated solutions over simulation-based MOO.

  • 58.
    Amouzgar, Kaveh
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Bandaru, Sunith
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Andersson, Tobias
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ng, Amos H. C.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Metamodel based multi-objective optimization of a turning process by using finite element simulation2019In: Engineering optimization (Print), ISSN 0305-215X, E-ISSN 1029-0273Article in journal (Refereed)
    Abstract [en]

    This study investigates the advantages and potentials of the metamodelbased multi-objective optimization (MOO) of a turning operation through the application of finite element simulations and evolutionary algorithms to a metal cutting process. The objectives are minimizing the interface temperature and tool wear depth obtained from FE simulations using DEFORM2D software, and maximizing the material removal rate. Tool geometry and process parameters are considered as the input variables. Seven metamodelling methods are employed and evaluated, based on accuracy and suitability. Radial basis functions with a priori bias and Kriging are chosen to model tool–chip interface temperature and tool wear depth, respectively. The non-dominated solutions are found using the strength Pareto evolutionary algorithm SPEA2 and compared with the non-dominated front obtained from pure simulation-based MOO. The metamodel-based MOO method is not only advantageous in terms of reducing the computational time by 70%, but is also able to discover 31 new non-dominated solutions over simulation-based MOO.

  • 59.
    Amouzgar, Kaveh
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Bandaru, Sunith
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ng, Amos H. C.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Radial basis functions with a priori bias as surrogate models: A comparative study2018In: Engineering applications of artificial intelligence, ISSN 0952-1976, E-ISSN 1873-6769, Vol. 71, p. 28-44Article in journal (Refereed)
    Abstract [en]

    Radial basis functions are augmented with a posteriori bias in order to perform robustly when used as metamodels. Recently, it has been proposed that the bias can simply be set a priori by using the normal equation, i.e., the bias becomes the corresponding regression model. In this study, we demonstrate the performance of the suggested approach (RBFpri) with four other well-known metamodeling methods; Kriging, support vector regression, neural network and multivariate adaptive regression. The performance of the five methods is investigated by a comparative study, using 19 mathematical test functions, with five different degrees of dimensionality and sampling size for each function. The performance is evaluated by root mean squared error representing the accuracy, rank error representing the suitability of metamodels when coupled with evolutionary optimization algorithms, training time representing the efficiency and variation of root mean squared error representing the robustness. Furthermore, a rigorous statistical analysis of performance metrics is performed. The results show that the proposed radial basis function with a priori bias achieved the best performance in most of the experiments in terms of all three metrics. When considering the statistical analysis results, the proposed approach again behaved the best, while Kriging was relatively as accurate and support vector regression was almost as fast as RBFpri. The proposed RBF is proven to be the most suitable method in predicting the ranking among pairs of solutions utilized in evolutionary algorithms. Finally, the comparison study is carried out on a real-world engineering optimization problem.

  • 60.
    Amouzgar, Kaveh
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre. Product Development Department, School of Engineering, Jönköping University, Jönköping, Sweden.
    Strömberg, Niclas
    Department of Mechanical Engineering, School of Science and Technology, University of Örebro, Sweden.
    Radial basis functions as surrogate models with a priori bias in comparison with a posteriori bias2017In: Structural and multidisciplinary optimization (Print), ISSN 1615-147X, E-ISSN 1615-1488, Vol. 55, no 4, p. 1453-1469Article in journal (Refereed)
    Abstract [en]

    In order to obtain a robust performance, the established approach when using radial basis function networks (RBF) as metamodels is to add a posteriori bias which is defined by extra orthogonality constraints. We mean that this is not needed, instead the bias can simply be set a priori by using the normal equation, i.e. the bias becomes the corresponding regression model. In this paper we demonstrate that the performance of our suggested approach with a priori bias is in general as good as, or even for many test examples better than, the performance of RBF with a posteriori bias. Using our approach, it is clear that the global response is modelled with the bias and that the details are captured with radial basis functions. The accuracy of the two approaches are investigated by using multiple test functions with different degrees of dimensionality. Furthermore, several modeling criteria, such as the type of radial basis functions used in the RBFs, dimension of the test functions, sampling techniques and size of samples, are considered to study their affect on the performance of the approaches. The power of RBF with a priori bias for surrogate based design optimization is also demonstrated by solving an established engineering benchmark of a welded beam and another benchmark for different sampling sets generated by successive screening, random, Latin hypercube and Hammersley sampling, respectively. The results obtained by evaluation of the performance metrics, the modeling criteria and the presented optimal solutions, demonstrate promising potentials of our RBF with a priori bias, in addition to the simplicity and straight-forward use of the approach.

  • 61.
    Anasagasti Alberdi, Mikel
    University of Skövde, School of Technology and Society.
    Function Block Environment in Wise ShopFloor: Graphical User Interface2012Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Nowadays, accomplishing real time information applications is one of the goals that customers are looking for in the market. Furthermore, two essential features are required in this society to ensure the success of these applications: reusability and interoperability. The new standard of Function blocks [FB] is one efficient way to reach them. This new standard, whose use has considerably  increased,  consists  of  a  large  number  of  functionalities  divided  into  distributed shorter  codes.  In  fact,  that  is  why  function  blocks  are  different  from  other  programming languages:   it   works  with   short   distributed   functionalities   interconnected   among   them. Therefore,  for  this  reason  function  blocks  are  used  in  distributed  automation  systems.  The function  block  standard  is  formally  specified  in  IEC  61499,  for  distributed  Industrial  Process Measurement  and  Control  Systems  (IPMCS).  It  is  worth  of  mentioning  that  function  blocks design is usually carried out graphically (interconnecting data and events within a FB network), whose clarity and easiness are always significant requirements, as in any visual system. On  the  other  hand,  web-based  application  development  is  getting  more  and  more  common during the last years because of its efficiency, portability and flexibility. It also provides many advantages to users, in real-time monitoring, real-time manufacturing, or even remote control. These are what companies are looking for in the 21st century. Nevertheless, combining web-based programming with function blocks can be the key to companies’ success.  This project consists of implementing a web-based function block environment for IEC 61499 compliant  control  systems  development.  It  would  be  a  proper  way  to  meet  the  above mentioned    customer    requirements    (efficiency,    portability,    flexibility,    reusability    and interoperability).  The  main  objective  of  the  five-month  project  is  to  develop  a  web-based function block environment with a user-friendly graphical interface. The challenges include:   - Carrying out research on Function Blocks and its run-time environment. -  Implementing  an  easy-to-use  graphical  interface  for  creating,  saving  and  editing different types of function blocks (basic FB, composite FB and applications). - Introducing iconic design and visual presentation of function blocks and connections via drag-and-drop. -  Developing  an  application  to  generate  eXtensible  Markup  Language  (XML)  files, allowing  the  exchange  of  files  between  different  tools  and  devices  of  different vendors. This web-based function block environment will be used at Volvo Cars and Sandvik AB as a part of  a  big  research  program.  It  is  anticipated  that  the  function  block  environment  will  be extended  and  applied  to  a  real-time  decision  support  system  for  walking  workers  where important events or tasks will be distributed to the right person at the right time.

  • 62.
    Ander, Jenny
    et al.
    University of Skövde, School of Engineering Science.
    Johansson, Matilda
    University of Skövde, School of Engineering Science.
    Utveckling av laddhandske för laddbara fordon2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    During the autumn term of 2017, Jenny Ander and Matilda Johansson have performed a project in collaboration with Sea Ice AB in the course Degree Project in Integrated Product Development at the University of Skövde. Sea Ice AB is working on developing charging infrastructure systems for rechargeable vehicles with focus on end-user benefits, high quality and increasing sustainability for the environment.The company is aiming to grow larger in the market and, in the future, be able to deliver attractive products and services, which in this project has involved the development of a new vehicle connector for rechargeable vehicles.

    During the project, vehicle connectors and CEE-plugs have been compared with each other, focusing on its internal components. The pre-study is based on literature studies where standards have been studied, ergonomics and user studies, questionnaires, electrical measurements, but mainly disassembly and analysis of vehicle connectors and CEE-plugs.

    After the pre-study, the concept development of the vehicle connector began with design methods, FEA-analyzes, CAD and clay modeling, concept screening and detail design. The concept development resulted in a complete final concept for both internal components, but also an external shell with ergonomic grip surfaces and angles.

    The final concept has been compared to the requirement specification and achieved the requirements set for the project, with some reservation for continued development. The vehicle connector has a unique and appealing appearance and meets the demands that both users and Sea Ice AB whished for.

  • 63.
    Andersson, Daniel
    et al.
    University of Skövde, School of Engineering Science. andersson.daniel89@gmail.com.
    Andersson, David
    University of Skövde, School of Engineering Science. davdii_@live.com.
    Produktionseffektivisering med hjälp av flödessimulering och förbättringsarbete2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    AB Furhoffs Rostfria is a company with its base in Skövde. They are specialists in the manufacturing of stainless-steel parts, such as plumbing products, floor wells and sinks. In addition to manufacturing their own products, the company also has a subcontract to manufacture other companies’ products.

    The department where this bachelor thesis will be conducted has a subcontract to manufacturing radar cones and treats only the production of the most frequent manufactured radar cones. The department consists of seven manufacturing steps and three additional steps for one of the details.

    The purpose of the bachelor thesis is to create a simulation model that shows how potential improvement proposals would meet the expected increase of the order intake of the radar cones by streamlining the current production flow. In order to achieve this, a simulation model has been created in which the improvement proposals have been implemented. The improvement proposals that have been tested are based on the data that has been collected through production engineering methods.

    The frame of references describes the theory that constitutes the foundation for the chosen methods. In addition, areas within discrete event simulation, lean production and improvement work have been studied from other works in the literature review. These areas can in some way relate to the work and conclusions of this project.

    The empirical study was conducted by using observations according to genchi genbutsu, conversations and interviews with operators, spaghetti diagrams of the operators and the product flow as well as time studies according to the continuous method. These methods have formed the basis for both the creation of the simulation model, where the current situation is reflected, and for the development of the future state simulation model. The future state simulation model shows the implementation of the improvement proposals that increases efficiency and production volume throughout the system.

    The empirical study resulted in a visual overview of the production flow, standard times, the identification of waste as well as improvement proposals. When all the improvement proposals were implemented, the hourly production was increased by 26.6% and the lead time was reduced by 21.1%. With these improvements, the company can increase their production and profit significantly.

  • 64.
    Andersson, Emil
    University of Skövde, School of Engineering Science.
    Optimization and re-design of a wheel hub to reduce unsprung mass of a rallycross car2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The Wheel Hub of a rallycross car is analysed to reduce the unsprung mass of the car. The problem statement is to mainly focus on the unsprung mass related to the suspension, and more specifically on the Wheel Hub. One of the objectives of the suspension system of a car is to damping the movement of the car. This is an important area when designing a vehicle, and especially a race car due to the extreme conditions that may result in reduced traction and loose of confidence for the driver. A theoretical model is performed to demonstrate the importance of a low unsprung mass and to illustrate how it affects the vehicle-handling. A process to evaluate the current Wheel Hub and decision to re-design the Wheel Hub is performed, and the parts are analysed using the Finite Element Method to verify the design and material selection. Vehicle dynamics of the car is analysed to calculate the acting forces. Optimization of the design is performed by using Computer Aided Engineering. The re-designed Wheel Hub presented as the result of this project with a Brake Disk Adapter integrated in Hub. This design reduces the number of parts, and the unsprung mass up to 25% without any effects on suspension geometry or other parts of the car.

  • 65.
    Andersson, Emilia
    University of Skövde, School of Technology and Society.
    Utveckling av vippgunga för barn i åldrarna 1-3 år2013Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    During the spring of 2013, Emilia Andersson, a student in product design engineering at University of Skövde, carried out a product development project in cooperation with HAGS Aneby AB. The aim of the project was to develop a seesaw adapted for children aged 1-3 years. The goal was to develop a seesaw that could be sold worldwide and meet the American standard and European standard for playground equipment.

    The project began with a pre study and a theory phase, which included literature review and competitor analysis and information were gathered to gain a deeper knowledge of the subject. Later on ideas and concepts were generated, which then through evaluations as user testing lead to a final concept. The concept was evaluated with for example strength calculations and an anthropometric analysis.

    The final seesaw can, despite adjustment for the age group, not only be use by 1-3-year-olds, but also by older children, this thanks to the design and the handles that provide extra play values.

  • 66.
    Andersson, Erica
    et al.
    University of Skövde, School of Engineering Science.
    Fritz, Sophia
    University of Skövde, School of Engineering Science.
    Möjligheter med kollaborativa robotar i slutmonteringen på Volvo GTO: Urvalsprinciper för en coaktiv implementation2017Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Collaborative robots are a new technology that offers flexibility and precision for manual tasks that previously have been difficult to automate. Volvo Group Trucks Operations engine plant in Skövde is a pilot plant where new technical solutions are tested before it is implemented in the rest of the company. The company sees that collaborative robots can provide benefits for the operator’s ergonomics and improved process and product quality in the final assembly of 13L truck engines. The purpose of the project is to investigate the possibilities of collaborative robots in the final assembly as well as to give a deeper understanding of the robot's field of application. The project has been defined to Universal Robots, preparation, preassembly and final assembly for 13L truck engines. The objectives are to develop distinctive features for a coactive implementation, to develop a basic analysis and to co-locate possible tasks into a coactive station and if co-location is not possible provide recommendations on minimal features that should be included in the collaborative robot.

    To achieve the goals, a systematic method has been prepared to ensure that the project addresses to the problem and the objectives. Knowledge has been gathered through literature studies and reference frameworks to form the basis for the practical work. All operations in areas 1-4 on the production line have been identified and analyzed to find coactive features, which has been the basis for developing a basic analysis. Several of the features that have been identified from the production line are consistent with what a Universal Robot can perform. That these features match, shows that a collaborative robot is possible to implement in the final assembly. The basic analysis has then been used to co-locate two coactive stations in the production line.

    The basic analysis could be used as a basis for the company in the implementation of collaborative robots. As technology of collaborative robots develops, the features and basic analysis needs to be updated.

  • 67.
    Andersson Hagiwara, Magnus
    et al.
    Centre for Prehospital Research, Faculty of Caring Science, Work Life and Social Welfare, University of Borås, Borås, Sweden.
    Backlund, Per
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Maurin Söderholm, Hanna
    Centre for Prehospital Research, Swedish School of Library and Information Science, Faculty of Librarianship, Information, Education and IT, University of Borås, Borås, Sweden.
    Lundberg, Lars
    Centre for Prehospital Research, Faculty of Caring Science, Work Life and Social Welfare, University of Borås, Borås, Sweden / Swedish Armed Forces Centre for Defence Medicine, Västra Frölunda, Sweden.
    Lebram, Mikael
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Engström, Henrik
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Measuring participants’ immersion in healthcare simulation: the development of an instrument2016In: Advances in Simulation, ISSN 2059-0628, Vol. 2016, no 1, article id 17Article in journal (Refereed)
    Abstract [en]

    Background

    Immersion is important for simulation-based education; however, questionnaire-based instruments to measure immersion have some limitations. The aim of the present work is to develop a new instrument to measure immersion among participants in healthcare simulation scenarios.

    Methods

    The instrument was developed in four phases: trigger identification, content validity scores, inter-rater reliability analysis and comparison with an existing immersion measure instrument. A modified Delphi process was used to develop the instrument and to establish validity and reliability. The expert panel consisted of 10 researchers. All the researchers in the team had previous experience of simulation in the health and/or fire and rescue services as researchers and/or educators and simulation designers. To identify triggers, the panel members independently screened video recordings from simulation scenarios. Here, a trigger is an event in a simulation that is considered a sign of reduced or enhanced immersion among simulation participants.

    Results

    The result consists of the Immersion Score Rating Instrument (ISRI). It contains 10 triggers, of which seven indicate reduced and three enhanced immersion. When using ISRI, a rater identifies trigger occurrences and assigns them strength between 1 and 3. The content validity analysis shows that all the 10 triggers meet an acceptable content validity index for items (I-CVI) standard. The inter-rater reliability (IRR) among raters was assessed using a two-way mixed, consistency, average-measures intra-class correlation (ICC). The ICC for the difference between weighted positive and negative triggers was 0.92, which indicates that the raters are in agreement. Comparison with results from an immersion questionnaire mirrors the ISRI results.

    Conclusions

    In conclusion, we present a novel and non-intrusive instrument for identifying and rating the level of immersion among participants in healthcare simulation scenarios.

  • 68.
    Andersson, Jennifer
    et al.
    University of Skövde, School of Informatics.
    Degerfeldt Nilsson, Hans
    University of Skövde, School of Informatics.
    Traditionella metoder eller abstrakt kreativitet?: En jämförelse av ljuddesign inom crafting och dess påverkan på spelupplevelsen2019Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Studier kring ljud och dess upplevelser tenderar att förhålla sig till grafiska element, där ljudet fungerar som en form av komplement till de visuella handlingar för att förstärka det som inträffar i spel. Symbiosen mellan grafik och spel utgår ifrån att dessa har definierade roller som de alltid behöver förhålla sig till och fungerar som en förutfattat mall över hur den ena ska agera gentemot den andra. Denna studie ämnar att behandla en jämförelse av två ljudläggningar med olika perspektiv, där den ena ljudläggningens förhållningssätt har fokus på att inte binda sig till konkreta, grafiska moment som sker i spelet och den andra ljudläggning ska följa stereotypiska angreppssätt till ljuddesign. Studien har tillämpat en spelprototyp som gestaltas genom ett matlagningspel där respondenter får dra ingredienser och lägga dessa inom ett område; för att på eget bevåg utforska spelets detaljer och avgöra vilka moment som är berikande för spelupplevelsen.

  • 69.
    Andersson, Johanna
    et al.
    University of Skövde, School of Technology and Society.
    Thyberg, Terese
    University of Skövde, School of Technology and Society.
    Chefsrekrytering: Hur fungerar det?2007Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Recruitment can include everything from hiring a stand-in for the summer to finding an executive for a big company. When hiring an executive is it important for the company that the right person gets the right job. There is little information in Swedish literature that explains how executive recruitment separates from ordinary recruitment. Neither is there any information about how internal and external executive recruitment are separated.

    When a recruitment process starts it is important to do a thorough preparatory work. This can be done by doing a work analyse, or a revision of the job description which is mostly used in executive recruitment. After this a specification of requirements is formed, the specification is a guide that the company uses to specify what kind of person they want to hire.

    The search of candidates for a position can be done in several different ways. The company has to decide if they should do the process by themselves or if a recruitment firm should be consulted, which is common today. There are several ways of searching candidates, the most common today is advertising in different media or using the employment service. The company also have to make a decision considering if the search should be done internal or external, or both ways.

    When suitable candidates have been chosen it is time for interviews and testing. At this time the recruiter meets the candidate for the first time and creates a picture of him or her. Testing is often used as a complement to the interview to confirm or deny feelings or suspicions that has arisen during the process. Another way of doing this is by contacting references, it is important to be aware of the fact that references often just have good things to say about the candidate. There is a risk with this considering that the whole truth might not come out.

    There are many different ways of making the decision who to hire, most important is though to use the specification of requirements as basic data. It is not always a need that all demands in the specifications are fulfilled, the candidates other qualifications can be more important.

    During this study it has come to our knowledge that the recruitment process for hiring executives are not that different from the process of hiring other co-workers. The biggest difference is that companies often choose to outsource the process to a consult. The companies in this study are quite small and think that they don’t have the right competence to find people with the right qualifications themselves. They think that it is better to pay money to the consultant than risk that the recruitment goes wrong and they have to do the process all over again.

    Companies today are more interested in recruiting executives from outside the company. In a time of changes they want an objective point of view to be able to survive in business. Once again there are no right or wrong way for the company to choose, but to search both internal and external might be the best solution to minimize the risk of overlooking the best candidate. Being able to advance in the company is a big push for many employees to work harder.

  • 70.
    Andersson, Kim
    University of Skövde, School of Informatics.
    Effekten av game feel: Hur tillägget av ren game feel påverkar en spelares immersion, jämfört med tillägget av detaljerad grafik, i ett actionspel med kort utvecklingstid2015Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Syftet med detta arbete är att jämföra effekterna av game feel och detaljerad grafik på en spelares immersion. Arbetet är riktat mot korta produktioner och har som mål att redovisa data som gör att spelutvecklare kan göra informerade val vid implementation av funktionalitet och grafik. Tre prototyper skapades för att mäta spelarnas immersion: en med abstrakt grafik, en med detaljerad grafik och en med game feel. Försökpersonernas upplevelse av prototyperna samlades in med hjälp av en webbbaserad enkät. Försökpersonernas svar visar inga säkra resultat men pekar på att försökspersonerna som spelade prototypen med game feel upplevde mest immersion.

  • 71.
    Andersson Lassila, Andreas
    et al.
    University of Skövde, School of Engineering Science.
    Folcke, Marcus
    University of Skövde, School of Engineering Science.
    Numerical and experimental analysis of adhesively bonded T-joints: Using a bi-material interface and cohesive zone modelling2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    With increasing climate change the automotive industry is facing increasing demands regarding emissions and environmental impact. To lower emissions and environmental impact the automotive industry strives to increase the efficiency of vehicles by for example reducing the weight. This can be achieved by the implementation of lightweight products made of composite materials where different materials must be joined. A key technology when producing lightweight products is adhesive joining.

    In an effort to expand the implementations of structural adhesives Volvo Buses wants to increase their knowledge about adhesive joining techniques. This thesis is done in collaboration with Volvo Buses and aims to increase the knowledge about numerical simulations of adhesively bonded joints. A numerical model of an adhesively bonded T-joint is presented where the adhesive layer is modelled using the Cohesive Zone Model. The experimental extraction of cohesive laws for adhesives is discussed and implemented as bi-linear traction-separation laws. Experiments of the T-joint for two different load cases are performed and compared to the results of the numerical simulations. The experimental results shows a similar force-displacement response as for the results of the numerical simulations. Although there were deviations in the maximum applied load and for one load case there were deviations in the behavior after the main load drop. The deviations between numerical and experimental results are believed to be due to inaccurate material properties for the adhesive, the use of insufficient bi-linear cohesive laws, the occurrence of a combination of adhesive and cohesive fractures during the experiments and dissimilar effective bonding surface areas in the numerical model and the physical specimens.

  • 72.
    Andersson, Linna
    et al.
    University of Skövde, School of Engineering Science.
    Bergström, Ellinor
    University of Skövde, School of Engineering Science.
    Utveckling av portabel mobilhållare som hjälpmedel vid e-möten och distansundervisning2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The purpose of the degree project is to methodically develop a product that will serve as an accessory for a smartphones during documentation. A preliminary study was done to gain a deeper knowledge and understanding of digital meeting rooms, how a camera works and what resolution is. With the information gathered, the work went on to a literature study on additive manufacturing, how a product can be designed and printed digitally. The preliminary study resulted in a requirement specification that formed the basis for concept generation and later a result.

     The result was a prototype of a lightweight and portable holder for smartphones that is 3D-printable and made out of only one material, which provides good recycling opportunities for the user. The prototype fulfills most of the sub-goals that were set up early and the main purpose of the project could also be met.

  • 73.
    Andersson, Louise
    et al.
    University of Skövde, School of Engineering Science.
    Erlandsson, Stefan
    University of Skövde, School of Engineering Science.
    Utveckling av ett lyftverktyg för skivformade produkter2014Independent thesis Basic level (professional degree), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    During the second semester of 2013, product design engineering students Stefan Erlandsson and Louise Andersson have been involved in a project in cooperation with entrepreneur Lars Willebrand. The main objective of this project has been to develop a lifting tool for sheet materials. The lifting tool is one of four different products developed by Lars Willebrand. The line of products also includes an overhead crane, a slewing crane and a storage drawer for metal sheets, which are already fully developed and ready for production. The purpose of this lifting tool is to be used along with the storage drawer which means that is has to be optimised for lifting sheet materials from different heights. This means that the lifting tool has to be designed with regards to the users working postures. Human factors such as ergonomics have to be taken into account as well.

    The initial part of the project is a pre-study with focus on ergonomics and human factors. This pre-study included a study in relevant literature, contact with a manufacturing company and an analysis of the possible competitor’s lifting tools. The results from the pre-study have further been used to define the specification of requirements, which is the foundation for the concept development. The concept development has undergone a number of different phases. All of the lifting tool’s main functions were broken down and developed individually. The functions were as follows; adjustment of the suction cups, lifting from different heights and handling. The most suitable solution for each main function were chosen and assembled into one final concept.

    The final concept has been analysed and further developed in order to please the employer and the users of the lifting tool. Some details in the design have been changed in order to ease the manufacturing of the lifting tool. To ensure that the final concept matches the specification of requirements, strength calculations and FEM analysis have been made and anthropometrical measurements have been taken into account. The final chapters include a discussion and recommendations for further development of the lifting tool.

  • 74.
    Andersson, Marie
    et al.
    University of Skövde, School of Technology and Society.
    Fredricsson, Sandra
    University of Skövde, School of Technology and Society.
    Effektivitetsmätning: En studie kring privata företags inre effektivitet2007Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Effektivitetsmätning är ett ständigt aktuellt ämne som intresserar många företag. Historiskt sett har denna mätning begränsats till ekonomiska aspekter, men i dagens samhälle räcker inte det. För att hänga med i den allt hårdare konkurrensen mellan företagen måste effektivitetsmätningen täcka upp organisationens samtliga aktiviteter. Utifrån teorier om effektivitet, mål och mått har det därför undersökts hur privata företag arbetar med den inre effektivitetsmätningen, samt hur detta kan appliceras på tjänste- och systemutvecklingsföretaget Aptic AB.

    Denna kvalitativa studie baseras på sju intervjuer genomförda på olika företag som alla har använt sig av effektivitetsmätningar i flera år. För att få en överblick av Aptic AB:s behov av liknande effektivitetsmätningar intervjuades även två personer från denna organisation. Intervjuerna var halvstrukturerade med öppna frågor för att respondenterna skulle ha möjlighet att ta upp det som de själva tyckte var viktigt.

    Empirin visar att effektivitet kan mätas genom att sätta upp mål inom områden som ekonomi, kvalitet, leveranssäkerhet, medarbetare, säkerhet, miljö och förbättringar, för att sedan utföra mätningar som visar hur verksamheten ligger till i förhållande till det. Eftersom samtliga företag ansåg att effektivitetsmätning är en viktig del i organisationens överlevnad på längre sikt, så rekommenderas även Aptic AB att påbörja detta arbete.

  • 75.
    Andersson, Martin
    University of Skövde, School of Technology and Society.
    Industrial scheduling with evolutionary algorithms using a hybrid representation2011Independent thesis Advanced level (degree of Master (One Year)), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Scheduling problems have been studied extensively in the literature but because they are so hard to solve, especially real-world problems, it is still interesting to find ways of solving them more efficiently. This thesis aims to efficiently solve a real-world scheduling problem by using a hybrid representation together with an optimisation algorithm. The aim of the hybrid representation is to allow the optimisation to focus on the parts of the scheduling problem where it can make the most improvement. The new approach used in this thesis to accomplish this goal, is the combination of simulation-based optimisation using genetic algorithms and dispatching rules. By using this approach, it is possible to investigate the effect of putting specified job sequences in certain machines and using dispatching rules in the other. The hypothesis is that the optimisation can use dispatching rules on non-bottleneck machines that have little impact on the overall performance of the line and some specified job sequences on bottleneck machines that are hard to be scheduled efficiently with dispatching rules. This would allow the optimisation to focus on the bottleneck machines and that would produce a more efficient search. The results from the case study shows it is a viable approach exceeding or equalling existing techniques. The hypothesis that the optimisation can focus its efforts is supported by a bottleneck analysis which corresponds with the experimental results from optimisations.

  • 76.
    Andersson, Martin
    University of Skövde, School of Humanities and Informatics.
    SANDBUNKERSEGMENTERING FÖR SMARTPHONES: Automatisk positionsuppskattning av sandbunkrar för smartphone som golfcaddie2011Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Ett av många nya användningsområden för smartphones är att använda dem som

    caddie på golfbanan. Golfaren kan få hjälp med avståndsuppskattning till intressanta

    punkter på banan genom att dessa punkter programmeras in och jämförs med

    smartphonens inbyggda positioneringssystem. Den här rapporten visar hur det med en

    bildsegmenteringsalgoritm går att slippa det manuella arbetet med att lägga in

    positioner för sandbunkrar på golfbanan. Algoritmen som tagits fram arbetar på

    satellitbilder som smartphonen kan ladda ned via dess Internetanslutning. Golfaren

    kan i ett tänkt scenario ge sig ut på en godtycklig golfbana och få hjälp med

    avståndsbedömning enbart med hjälp av satellitbilder och smartphonens gps. I snitt

    hittar den framtagna segmenteringsalgoritmen cirka 70 % av sandbunkrarna på en

    satellitbild, en siffra som i en verklig applikation skulle behöva ökas och förslag på

    hur detta kan göras ges i slutet av rapporten. Tre olika upplösningar på satellitbilderna

    har utvärderats och testkörts i en nyare smartphone. Även om den högsta

    upplösningen används tar en hel golfbana endast cirka 15 sekunder att segmentera

    vilket bör hinnas med under loppet av en vanlig golfrunda som i regel tar 3 till 5

    timmar.

    I ett vidare perspektiv går det att tänka sig helt andra tillämpningar där det finns

    behov av positionsuppskattning av objekt i en satellitbild i sin smartphone. Det bör på

    ett förhållandevis enkelt sätt gå att utvidga slutsatserna som dragits i rapporten till att

    gälla annat än enbart sandbunkrar, t.ex. sjöar, fält, åkrar och givetvis andra delar av

    golfbanan som vattenhinder och greener.

  • 77.
    Andersson, Martin
    et al.
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Syberfeldt, Anna
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Ng, Amos
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Bengtsson, Victor
    Posten AB, Solna, Sweden.
    Evolutionary Simulation Optimization of Personnel Scheduling2014In: Industrial Simulation Conference, Skövde, June 11-13, 2014, Eurosis , 2014, p. 61-65Conference paper (Refereed)
    Abstract [en]

    This paper presents a simulation-optimization system for personnel scheduling. The system is developed for the Swedish postal services and aims at finding personnel schedules that minimizes both total man hours and the administrative burden of the person responsible for handling schedules. For the optimization, the multi-objective evolutionary algorithm NSGA-II is implemented. The simulation-optimization system is evaluated on a real-world test case and results from the evaluation shows that the algorithm is successful in optimizing the problem.

  • 78.
    Andersson, Moa
    University of Skövde, School of Informatics.
    How can one create an aura from a digital reproduction?2017Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    How can one create an aura from a digital reproduction? According to researchers like Walter Benjamin (1936) this is not possible. However with todays technology and digitalmedia it is worth looking into how it would be possible.Museums are looking for ways to expand the experiences of their exhibitions with thehelp of digital media, but research into authenticity and aura in digital reproductions islimited. This research aims to answer if it is possible to create an aura from a digitalreproduction and in what way that would be done.

  • 79.
    Andersson, Moa
    University of Skövde, School of Informatics.
    How do AR visualizations impact users' collective interactions in mixed reality experiences?2016Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This study examines how Augmented Reality (AR) visualizations can impact the collective interaction of users. This research will focus on a multiphase experience with a buildup of different levels of Virtual Reality through the use of panoramas and 3D models. The experience was created using a participatory method with multiple tests and iterations to better create an evaluable product.

    The result if this experiment shows that the impact AR has on users is extensive. A properly framed character can even change a pair of two users into a group of three.

  • 80.
    Andersson, Moa
    University of Skövde, School of Informatics.
    What key design features can be identified in creating a tool/game for helping children open up about sexual abuse through the collaboration with health care professionals?2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    What key design features can be identified in creating a tool/game for helping children open up about sexual abuse through the collaboration with health care professionals? In today’s society, sexual abuse of children is a real and common occurrence. This research will explore what role interactive media can play in helping children open up about abuse as well as identify 11 key design features for designing such a tool. To do so, the participatory method (Simon 2010) will be utilized throughout the design process, based on the collaboration with health care professionals to ensure as relevant and applicable design features as possible. The result of this study are the first iterations of designing this tool as well as the 11 key features that were identified with the help of health care professionals’ expertise.

  • 81.
    Andersson, My
    et al.
    University of Skövde, School of Engineering Science.
    Hovbjer, Samantha
    University of Skövde, School of Engineering Science.
    Från manuella monteringstationer till människa-robot samarbete: Framtagning av en specifikation för HRC2019Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    As industry 4.0 is rising companies are obliged to work to increase their quality, flexibility and reduce their changeover time. The final year project is written for Högskolan I Skövde and Volvo GTO with focus to identify possible human-robot collaboration tasks in a manual assembly line. The main objective for the thesis is to developed a method for a specification for implementation of virtual collaboration station.

    A central point for the thesis is sustainable development. By reducing non ergonomically and stressful tasks, social sustainability can be increased which can lead to lead to less scrap and quality deviation.

    Presumptions for the thesis are analyzed and discussed where standardized work is a central and important part. Four general collaborations methods are mentioned. A specific collaborative robot where used and its proficiency analyzed during the work, a UR10e. Previous researched mentioned the safety issue related to implementation of a collaborative robot. A recommendation to properly ensure the safety is to perform a risk assessment when the work sequence and layout is generated.

    To identify potential tasks for the collaborative robot data related to the defined stations needs to be analyzed. The conclusion was that only one station included all the five identified potential tasks for the collaborative robot. This resulted in an adjustment of the work order for the selected station and thereby create a human robot collaboration.

    Two implementation suggestions where created and differed only in the location of a specific component. The new position for the component requires a reorganization of the material handling to the station. There are two categories of product variants and the new working sequences reduce the work load because tasks are performed by the robot.

    The generated method to create a specification is based on the work performed during the thesis. This method includes recommendation and methods which will facilitate similar projects. Standardize work is a key factor to create similar prerequisites.

    A recommendation for continual work is to create a virtual environment where a risk assessment can take place in order to generate a safe work environment.

  • 82.
    Andersson, Rasmus
    et al.
    University of Skövde, School of Engineering Science.
    Hellgren, Martin
    University of Skövde, School of Engineering Science.
    ÖKAD PRODUKTIVITET GENOM STÄLLTIDSREDUCERING: En fallstudie2014Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Kongsberg Automotive (KA) is a company operating in the highly competitive automotive industry. At one of its plants located in Mullsjö, assembling of gear transmission systems is taking place. KA sees a need to increase capacity in the section by increasing productivity. A large potential for improvement are identified during the changeover between different product variants in the assembly section. The setup time reduction is expected to increase the productivity in the assembly section, which also contributes to increased flexibility in order to competitively meet customer’s flexible needs. In order to determine the starting position at the improvement work, a situation analysis and suggestions for improvement to reduce setup time can be worked out. Implementation of improvement suggestions can then be adopted. In order to document the current situation and to demonstrate improvements in the setup time reduction a simulation model was establishes. The simulation model will demonstrate an example of when to use production simulation tool.

    To implement the setup time reduction SMED (Single -Minute Exchange of Die) is used, originally developed to reduce the setup time for the press machines. The method aims at reducing setup time to under 10 minutes, the "single- minute'. Through video documentation, participant observation, and further data collection methods the present situation could be determined. This created a good picture of the operations carried out and the time consumption it corresponded to. To verify the data of the current situation timing of work elements according to snapback method was conducted. The simulation model is constructed after Banks twelve-step method with the data gathered during the project. The model is then verified against the situation analysis. When improvement proposals were formulated the values were added ​​into the model, which corresponded to the calculated time improvement proposals. The improvement proposals for the setup time are partly produced by the project, but also through a workshop with staff at KA and focusing on the five previously identified problem areas. The improvement proposals were evaluated on the workshop through a pick chart.

    Five elaborate improvements that require little effort but gives a great effect was presented to KA. To verify theoretical calculations, a pilot with four of the five improvements temporarily implemented. The results showed a reduction of setup time from 38 minutes to 3.7 minutes, which corresponds to an improvement of 90.3%.  The analysis also shows that the improvement creates a reduction in the production rate in normal assembly. In total, the improvements in this project increase OEE value in assembly section with 4.2%. Even so, one of the stated objectives of the project will not be achieved since the setup time activities are too small part of the available time in the assembly section.

  • 83.
    Andersson, Rikard
    et al.
    University of Skövde, School of Engineering Science.
    Welin, Annika
    University of Skövde, School of Engineering Science.
    Analys av elasticitetsmodulsvariationer i vevaxel2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    A study is performed regarding an eventual variation of the Young's modulus in crankshafts from Volvo Cars, which are delivered from subcontractors. The purpose of the study is to enable future FE-analysis regarding the cutting processing that crankshafts are exposed for at Volvo Cars. Thus, an examination are is desired if these FE-analysis can be done with using a constant Young's modulus. Two 4-cylindrical crankshafts are obtained from Volvo Cars, which are partioned divided into four parts each, and each and used in two experiments. Where experiment one, was a pressure compression test in a tensile stress testing machine at the University of Skövde, and experiment two, where experiment one, are is mimicked in the software Abaqus CAE with boundary conditions and load. Also, three part experiments are performed, one where the parts of the crankshaft were allowed to spring back, two where an examination of stress concentrations in Abaqus CAE to examine if the parts of the crankshaft plasticizes and three, where one of the divided crankshaft parts are inverted in the tensile stress test machine to examine measurement uncertainty. The obtained results show that it is a small variation of the Young's modulus in the two crankshafts, with a variation of 3.45 %. This variation can be explained with a measurement uncertainty, because in part experiment three where the paortioneddivided crankshaft part were twisted aroundinverted in the tensile stress test machine show a measurement uncertainty of 3.16 %. The percentage difference between the two crankshafts are bigger, and this can not only originate from a measurement uncertainty.

    Completed analyses show that FE-analysis is an applicable method to calculate the deformation of crankshafts from engines with 4-cylinders, but it can be a need for Volvo Cars to carry out further investigations regarding a varying Young's modulus between different providers/batches of the raw material for crankshafts.

  • 84.
    Andersson, Rinat
    et al.
    University of Skövde, School of Engineering Science.
    Johansson, Martin
    University of Skövde, School of Engineering Science.
    Underlag för beslut av investering i ny utrustning2016Independent thesis Basic level (university diploma), 15 credits / 22,5 HE creditsStudent thesis
  • 85.
    Andersson, Tobias
    University of Skövde, School of Technology and Society.
    Mechanical Behaviour of Adhesive Layers: Methods to Extract Peel and Mixed Mode Properties2006Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Mechanical Behaviour of Adhesive Layers Methods to Extract Peel and Mixed Mode Properties TOBIAS ANDERSSON Department of Applied Mechanics Chalmers University of Technology ABSTRACT This thesis is concerned with methods to extract material properties of thin adhesive layers loaded in peel and in mixed mode. The first part of the thesis is devoted to an experimental method to determine the complete stress-elongation relation (or cohesive law) for an adhesive layer loaded in peel using the DCB-specimen. The method is based on the concept of equilibrium of the energetic forces acting on the specimen. Two sources of energetic forces are identified: the start of the adhesive layer and the positions of the two acting loads. By use of the concept of equilibrium of energetic forces, it is possible to measure the energy release rate of the adhesive layer instantaneously during an experiment. The complete stress-elongation relation is found to be the derivative of the energy release rate with respect to the elongation of the adhesive layer at its start. By this procedure, an effective property of the adhesive layer is measured. The validity of the approach is investigated by experiments where the adherends deform 1) elastically and 2) plastically. It is found that a unique stress-elongation is obtained when the adherends deform elastically. The same relation cannot be used to predict the experiments where the adherends deform plastically indicating that the approach has limited applicability. The second part of the thesis is concerned with the development of a mesomechanical finite element model of a thin adhesive layer loaded in mixed mode. The model is calibrated to previously performed experiments. In these, the adhesive layer is loaded in monotonically increasing peel or shear. An in situ SEM-study is also performed and used to guide the modelling and calibration. The purpose of the mesomechanical finite element model is to facilitate the development of constitutive laws for adhesive layers. The modelling is based on Xu and Needleman’s method where all continuum finite-elements are surrounded by interface elements that allow for the development of micro cracks. Thus, this enables the modelling of the entire process of degradation and fracture of the adhesive layer. A genetic algorithm is developed for the calibration. The simulations are shown to be in reasonably good agreement with the experiments. Keywords: adhesive layer, stress-elongation relation, J-integral, energetic force, experimental method, RVE, interface elements, genetic algorithm

  • 86.
    Andersson, Tobias
    et al.
    University of Skövde, School of Technology and Society.
    Biel, Anders
    University of Skövde, School of Technology and Society.
    On the effective constitutive properties of a thin adhesive layer loaded in peel2006In: International Journal of Fracture, ISSN 0376-9429, E-ISSN 1573-2673, Vol. 141, no 1-2, p. 227-246Article in journal (Refereed)
    Abstract [en]

    An experimental method to determine the complete stress-elongation relation for a structural adhesive loaded in peel is presented. Experiments are performed on the double cantilever beam specimen, which facilitates a more stable experimental set-up as compared with conventional methods like the butt-joint test. The method is based on the concept of equilibrium of the energetic forces acting on the specimen. Two sources of energetic forces are identified: the start of the adhesive layer and the positions of the two acting loads. By use of the concept of equilibrium of energetic forces, it is possible to measure the energy release rate of the adhesive layer instantaneously during an experiment. The complete stress-elongation relation is found to be the derivative of the energy release rate with respect to the elongation of the adhesive layer at its start. By this procedure, an effective property of the adhesive layer is measured. That is, the fields are assumed to be constant through the thickness of the layer and only vary along the layer. To investigate the validity of this approach, experiments are performed on five different groups of specimens with different dimensions. This leads to large variations in the length of the damage zone at the start of the adhesive layer. Four of the experimental groups are used to determine the stress-elongation relation. This is found to be independent of the geometry. For the remaining experimental group, the adherends deform plastically and simulations are performed with the stress-elongation relation determined from the four elastic groups. It is found that the relation cannot be used to accurately predict the behaviour of the experiments where the adherends deform plastically. This indicates that the stress-elongation relation has limited applicability.

  • 87.
    Andersson, Tommy
    University of Skövde, School of Humanities and Informatics.
    Avvaktande AJAX- anrop: En avlastningsteknik för 3G-nätet2012Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Den ökade användningen av nätuppkopplade mobilapplikationer har resulterat i en överbelastning i 3G-nätet. Förslag för att avlasta nätet har bland annat varit genom alternativa uppkopplingar, vilket innebär en uppoffring av 3G-nätets tillgänglighet. Detta leder till frågor om andra avlastningsmetoder. Arbetets målsättning var att se hur en applikations datatrafik påverkas av att klassiska intervallanrop ersätts av avvaktande AJAX-anrop. Detta görs genom att implementera respektive anropsmetod i två identiska alfapetapplikationer. Mätdata erhölls genom att låta användare spela längre omgångar av respektive applikation, vilket även genererar realistiska uppdateringar. Resultaten visar att den klientgenererade bandbreddskonsumtionen minskas vid användning av avvaktande AJAX-anrop. Detta gör den, i kontrast med klassiska intervallanrop, till en möjlig avlastningsmetod.

  • 88.
    Andersson, Viktor
    et al.
    University of Skövde, School of Engineering Science.
    Larsson, Andreas
    University of Skövde, School of Engineering Science.
    Project ABSS: Adhesive bonding of stainless steels2017Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This report aims to increase the scientific knowledge about long-term prospects for the adhesive and adhesive joints for bonding of stainless steels. The effects of water, temperature and chemicals on the adhesive and adhesive joints are investigated. Stainless steel plates are pretreated with a primer and isopropanol, there after joined together with single lap modeling. The strength of the joint is tested with a tensile test and additionally a watertightness test is performed to determine if the joints are watertight.

    For this project three versions of stainless steels is used and two different technologies of two- part adhesives, silicone and silane-modified polymer and one technology of tape, a double coated acrylic foam tape are tested.

    The result shows that all the adhesives fails cohesively and that tape fails partly adhesively. Result shows that all tests are affected by water, temperature and chemicals on different levels but tape is affected the most with a minimum of 40% loss in shear strength. Watertightness test shows that aged tape joints are not watertight. The polymer shows no signs of decreasing in shear strength and is watertight, but does become more viscous by aging.

    The report shows that a possible combination of adhesive and pretreatment that can withstand the effects of water, temperature and chemicals is found. The polymer presents a possibility to bond stainless steel with a simple pretreatment. Tape didn’t pass the test in a suitable way but presents opportunities if a sufficient pretreatment can be found. 

  • 89.
    Andre, A.
    et al.
    Swerea Sicomp AB, Composite Struct, Molndal, Sweden / Chalmers, Div Struct Engn, S-41296 Gothenburg, Sweden .
    Haghani, Reza
    Chalmers, Div Struct Engn, S-41296 Gothenburg, Sweden .
    Biel, Anders
    University of Skövde, School of Technology and Society.
    Application of fracture mechanics to predict the failure load of adhesive joints used to bond CFRP laminates to steel members2012In: Construction and Building Materials, ISSN 0950-0618, E-ISSN 1879-0526, Vol. 27, no 1, p. 331-340Article in journal (Refereed)
    Abstract [en]

    The use of bolted or welded elements to upgrade metallic structures has been a common practice for many years. Moreover, the use of adhesively bonded carbon fiber reinforced polymer (CFRP) laminates, as an alternative method, has attracted a great deal of attention in recent years. One important aspect of the design of adhesive joints used to bond CFRP laminates to steel substrates is the determination of the properties of the CFRP/adhesive/steel interfaces, which have not yet been established in codes or standards. The purpose of this paper is experimentally to determine the fracture properties of the adhesive material and to evaluate the accuracy of numerical methods using this information, in order to predict the strength of adhesive joints in steel members bonded with CFRP laminates. The results from four series of experimental tests are compared with numerical results and discussed in terms of load-bearing capacity and failure modes. (C) 2011 Elsevier Ltd. All rights reserved.

  • 90.
    Andreasson, Fredrik
    et al.
    University of Skövde, School of Business.
    Bofacher, Emilia
    University of Skövde, School of Business.
    Hållbart Inköp: En kvalitativ studie av hur svenska möbelföretag tillämpar CSR i sitt inköpsarbete2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Hållbarhet är idag ett aktuellt ämne som har influerat många industrier och logistikstrukturer. Syftet med denna rapport är att studera hur inköpsfunktionen inom möbelbranschen kan bidra till att öka den hållbara utvecklingen inom företag och därmed påverka den hållbara utvecklingen i samhället. Författarna för denna studie har studerat hur hållbarhetsarbetet ser ut hos fyra svenska möbelföretag samt hur deras kortsiktiga- och långsiktiga mål ser ut. Arbetet med hållbart inköp gynnar flera parter i en försörjningskedja och i samhället. Litteraturen som har använts visar på att det hållbara arbetet oftast brister hos leverantörerna på fabrikerna. Många fabriker finns i länder som är klassificerade som högriskländer, vilket innebär att de inte förhåller sig till exempelvis rättvisa arbetsvillkor eller löner. I de fallen behöver företag interagera leverantörerna i sitt CSR-arbete, utöver sitt interna hållbarhetsarbete, vilket innefattar ett ekonomiskt, miljömässigt och socialt ansvarstagande. Genom att arbeta med CSR-aspekterna kopplat till inköpsarbetet, kan företag uppnå ett hållbart inköp. Författarna för denna studie har analyserat vilka svårigheter som finns i hållbarhetsarbetet och har på så sätt kunnat redogöra för eventuella förbättringsåtgärder. Den teoretiska referensramen lyfter fram teorier som har kunnat användas som riktlinjer för utvecklingsarbetet för hållbart inköp. Det empiriska materialet sammanställer hur företagens inköpsstrategier ser ut för det ekonomiska, miljömässiga och det sociala arbetet idag. Många av de studerade företagen förhåller sig till teorin, även om de har potential att arbeta med teorierna i större utsträckning. Resultatet av denna studie är att det föreligger en gemensam svårighet för de studerade företagen, vilket är att integrera leverantörer och underleverantörer i CSR-arbetet för att uppnå ett hållbart inköp. Eftersom det exempelvis förekommer kulturella skillnader och lagstiftningar, kan det vara svårt att påverka leverantörerna. Därför ingår en del av företagen i samarbete med externa parter som granskar att leverantörerna förhåller sig till företagens krav och till de globala riktlinjerna. Genom att utöva inflytande på leverantörernas arbete och få dem att förstå hur kedjan tillsamman kan bidra till ett hållbart klimat, kan de skapa ett närmare samarbete för att företaget ska uppnå ett hållbart inköp.

  • 91.
    Andreasson, Rebecca
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    User experience of affective touch in human-robot interaction2015In: Proceedings of the 2015 SWECOG conference, Skövde: University of Skövde , 2015, p. 5-Conference paper (Refereed)
    Abstract [en]

    Robotic technology is quickly advancing and robots are entering both professional and domestic settings. An increased application of robots in elderly care and in therapy shows a shift towards social robots acting in human environments, designed to socially interact with humans. Socially interactive robots need to act in relation to social and emotional aspects of human life, and be able to sense and react to social cues. Touch, as one of the most fundamental aspects of human social interaction (Montagu, 1986) has lately received great interest in human-robot interaction (HRI) research (e.g. Dahiya et al., 2010; Silvera-Tawil et al., 2015) and the interpretation of touch in robotics has been presented as an unresolved research area with a crucial role in further development of HRI (Silvera-Tawil et al., 2015). It has been argued that the communicative distance between people and robots would be shortened and that the interaction would be more meaningful and intuitive if robots were able to “feel”, “understand”, and respond to touch in accordance with expectations of the human (Silvera-Tawil et al., 2015). However, this reasoning takes the notion of user experience (UX) for granted. The concept of UX embraces both pragmatic and hedonic aspects of interaction with technology in a particular context (Hartson & Pyla, 2012). In the field of human-computer interaction, UX has been acknowledged as a key term in the design of interactive products, but UX has not been emphasized in HRI. Accordingly, this research argues that it is important to study not only the robotic technology aspect of tactile interaction but also the user’s experience of the interaction, i.e. taking on the human-centered HRI approach presented by Dautenhahn (2007). Research on human-human interaction has showed that humans are able to communicate emotions via touch, and that specific emotions are associated with specific touch behaviors (Hertenstein et al., 2009). As a starting point for narrowing the distance between UX and HRI, the present research suggests a study where subjects are instructed to convey specific emotions to a humanoid robot. The study aims at investigating the role of affective touch in HRI with a focus on touch behaviors (e.g. stroking, grasping) for specific emotions, touch locations on the robot, and user experience of interacting with the robot via touch. The intended contributions of this study are an increased understanding of the necessary properties of tactile sensors enabling affective touch in human-robot interaction, the relevant placements of the sensors on the robot, and how the robot’s “look and feel” affects the user’s experience of the interaction. The proposed research embarks on a new track of HRI research and will, contrary to prior research on tactile interaction in HRI, emphasize the user experience of affective touch, highlighting that a positive user experience has to be systematically and consciously designed in order for the social robots to achieve the intended benefits of being socially interactive. Accordingly, the proposed study is believed to give new insights about the understudied dimension of UX in HRI, with the potential to enrich interaction between humans and social robots.

  • 92.
    Andreasson, Rebecca
    University of Skövde, School of Humanities and Informatics.
    Ökad grad av användbarhetsarbete i organisationer: Utveckling av rekommendationer för en ökad tillämpning av användarcentrerade designansatser2012Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Människans samspel med teknik har blivit allt mer vanligt förekommande. Detta medför en allt större vikt på användbarhet, något som lämpligen uppnås med hjälp av användarcentrerade designansatser. Forskningsfältet människa-datorinteraktion (MDI) är idag högst aktuellt och snabbt växande, men det har trots detta uppvisats ett gap mellan teori och praktik där de tekniker som vetenskapen presenterar ej tillämpas. En fallstudie med aktionsforskningsperspektiv utfördes för att få en förståelse för vilka aktiviteter från de användarcentrerade designansatserna som tillämpas, vilka som ej tillämpas, samt varför. Studien genomfördes på ett företag som arbetar med högteknologisk utveckling med hjälp av datainsamlingsteknikerna observation och intervju. Vidare studerades problemet även genom ett aktivt deltagande i en av företagets designprocesser. Resultatet tyder på ett bristande användbarhetsarbete och genom en integrering av den insamlade empirin och den teoretiska referensramen har sex rekommendationer för ökad användning av aktiviteter från de användarcentrerade designansatserna tagits fram.

  • 93.
    Andreasson, Rebecca
    et al.
    Uppsala universitet.
    Jansson, Anders A.
    Uppsala universitet.
    Lindblom, Jessica
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Past and Future Challenges for Railway Research and the Role of a Systems Perspective2019In: Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018): Volume VII: Ergonomics in Design, Design for All, Activity Theories for Work Analysis and Design, Affective Design / [ed] Sebastiano Bagnara, Riccardo Tartaglia, Sara Albolino, Thomas Alexander, Yushi Fujita, Cham: Springer, 2019, p. 1737-1746Chapter in book (Refereed)
    Abstract [en]

    Operational train traffic is dependent on an efficient traffic plan monitored and executed by the traffic controllers, the proficient maneuvering of the trains by the train drivers, and on the interaction, communication, and coordination between these two work roles. The railway research community, and the branch of industry itself, has called for an integrated systems perspective for the whole train traffic system to achieve an efficient performance. As human-human and human-technology interactions are natural parts of the socio-technical system of train traffic, the aim of this paper is to provide illustrative examples for why a systems perspective is needed for the future of railway research. Furthermore, we present the theoretical framework of distributed cognition (DCog) as a necessary addition to the theoretical and methodological toolbox of the Human Factors and Ergonomics (HF&E) discipline. To realize efficient and coordinated processes involved in organizing and executing operational train traffic, the paper proposes that the DCog framework should be implemented in the train traffic domain as a viable approach forward.

  • 94.
    Andreasson, Rebecca
    et al.
    Uppsala University.
    Jansson, Anders A.
    Uppsala University.
    Lindblom, Jessica
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    The coordination between train traffic controllers and train drivers: a distributed cognition perspective on railway2019In: Cognition, Technology & Work, ISSN 1435-5558, E-ISSN 1435-5566, Vol. 21, no 3, p. 417-443Article in journal (Refereed)
    Abstract [en]

    Although there has long been a call for a holistic systems perspective to better understand real work in the complex domain of railway traffic, prior research has not strongly emphasised the socio-technical perspective. In operational railway traffic, the successful planning and execution of the traffic are the product of the socio-technical system comprised by both train drivers and traffic controllers. This paper presents a study inspired by cognitive ethnography with the aim to characterise the coordinating activities that are conducted by train traffic controllers and train drivers in the work practices of the socio-technical system of Swedish railway. The theoretical framework of distributed cognition (DCog) is used as a conceptual and analytical tool to make sense of the complex railway domain and the best practices as they are developed and performed “in the wild”. The analysis reveals a pattern of collaboration and coordination of actions among the workers and we introduce the concept of enacted actionable practices as a key concern for understanding how a successfully executed railway traffic emerges as a property of the socio-technical system. The implications for future railway research are briefly discussed.

  • 95.
    Andreasson, Rebecca
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Lindblom, Jessica
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Thorvald, Peter
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Distributed Cognition in Manufacturing: Collaborative Assembly Work2016In: Advances in Manufacturing Technology XXX / [ed] Yee Mey Goh, Keith Case, IOS Press, 2016, p. 243-248Conference paper (Refereed)
    Abstract [en]

    Cognitive science is becoming increasingly central within humanfactors and ergonomics (HF&E) and there has long been a call for a more systemicperspective in the area with a somewhat broader unit of analysis. This paperpresents a case study applying the theoretical framework of distributed cognition(DCog), which shows how DCog would offer a more complete understanding ofmanufacturing within its greater context, including the social, cultural, andmaterial surroundings. This paper aims to characterize and analyse dock assemblyof forest machines as a complex socio-technical system from a DCog perspective;focusing on the creation of enacted landscapes in this particular setting. The paperalso exemplifies benefits of using the DCog framework in the manufacturingdomain as a way of grasping the assembly workers’ tacit competence and skills.

  • 96.
    Andreasson, Rebecca
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Lindblom, Jessica
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Thorvald, Peter
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Interruptions in the wild: portraying the handling of interruptions in manufacturing from a distributed cognition lens2017In: Cognition, Technology & Work, ISSN 1435-5558, E-ISSN 1435-5566, Vol. 19, no 1, p. 85-108Article in journal (Refereed)
    Abstract [en]

    This paper presents a study examining interruptionsin the wild by portraying the handling of interruptionsin manufacturing from a distributed cognitionlens. By studying how interruptions occur and are handledin the daily activities of a work team at a large foundry forcasting heavy diesel engines, we highlight situations whenthe propagation, transformation, and representation ofinformation are not supported by prescribed work processesand propose recommendations for how this can beamended. The study was conducted by several visits to theaforementioned factory with cognitive ethnography as thebasis for the data collection. The focus was on identifyinginterruptions and analysing these through a distributedcognition framework as an initial step towards studyinginterruptions in a manufacturing environment. The keyfindings include the identification of three, previouslyundefined, types of interruptions and the conclusion thatinterruptions do indeed affect the distributed workload ofthe socio-technical system and thus the overall productionperformance at the casting line.

  • 97.
    Andreasson, Rebecca
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre. Department of Information Technology, Visual Information and Interaction, Uppsala University, Uppsala, Sweden.
    Lindblom, Jessica
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Thorvald, Peter
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Tool use and collaborative work of dock assembly in practice2017In: Production & Manufacturing Research, ISSN 2169-3277, Vol. 5, no 1, p. 164-190Article in journal (Refereed)
    Abstract [en]

    In order to deepen the understanding of the intrinsic interactions andinterplay between humans, tools, and environment from a systemsperspective, research in the wild (RITW) approaches have gainedtraction during recent decades as they provide a higher ecologicalvalidity of findings. This paper presents a RITW study, investigatinghow assembly, in this case dock assembly of forwarders, was donein practice. As our theoretical foundation, we used the framework ofdistributed cognition, which is one of the main pillars of RITW. Thefindings are presented in narrative form, describing and highlightingthat the workers achieve an efficient production outcome by beingintegral parts of the whole production process and doing so throughcoordination of activities benefitting the shared goal of the distributedsocio-technical system.

  • 98.
    Andreasson, Rebecca
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Lindblom, Jessica
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Thorvald, Peter
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Towards an increased degree of usability work in organizations2015In: Procedia Manufacturing, ISSN 2351-9789, Vol. 3, p. 5739-5746Article in journal (Refereed)
    Abstract [en]

    It is widely recognized that there is a substantial gap between usability research and practice where UCD approaches are rarelyapplied in practice due to arguments regarding the intricate nature of its methods and techniques. This paper presents an actionresearch study designed to investigate and analyze the potentials for an increased degree of UCD activities in the earlydevelopment phases of advanced information systems technology. The results demonstrate that there is a large interest inusability but that organizational priority and competence is often lacking. Instead one relies heavily on questionable conceptssuch as „trained professionals‟ to excuse the low effort towards usability. Based on the results, six recommendations forimproved usability work in R&D organizations are presented, focusing on the importance of prioritization of, and education inusability work.

  • 99.
    Andreasson, Rebecca
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Riveiro, Maria
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Effects of Visualizing Missing Data: An Empirical Evaluation2014In: 18th International Conference on Information Visualisation (IV) / [ed] Ebad Banissi, Mark W. McK. Bannatyne, Francis T. Marchese, Muhammad Sarfraz, Anna Ursyn, Gilles Venturini, Theodor G. Wyeld, Urska Cvek, Marjan Trutschl, Georges Grinstein, Vladimir Geroimenko, Sarah Kenderdine & Fatma Bouali, IEEE conference proceedings, 2014, p. 132-138Conference paper (Refereed)
    Abstract [en]

    This paper presents an empirical study that evaluates the effects of visualizing missing data on decision-making tasks. A comparison between three visualization techniques: (1) emptiness, (2) fuzziness, and (3) emptiness plus explanation, revealed that the latter technique induced significantly higher degree of decision-confidence than the visualization technique fuzziness. Moreover, emptiness plus explanation yield the highest number of risky choices of the three. This result suggests that uncertainty visualization techniques affect the decision-maker and the decisionconfidence. Additionally, the results indicate a possible relation between the degree of decision-confidence and the decision-maker's displayed risk behavior.

  • 100.
    Antonsson, Arvid
    et al.
    University of Skövde, School of Engineering Science.
    Hermansson, Gustaf
    University of Skövde, School of Engineering Science.
    System analysis, improvement and visualisation of a manufacturing workflow, using discrete-event simulation: A combination of discrete-event simulation and lean manufacturing2019Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This project has been initiated in cooperation with a Swedish manufacturing company. Due to increased demand and competition, the company wants to streamline its production process, increase the degree of automation and visualize specific workflows. By creating a frame of reference and a literature review, a theoretical basis for methods and concepts which has been utilized throughout the project has been obtained. With the help of the identified methods and methodologies, a current state analysis was performed. Using traditional Lean tools such as Genchi genbutsu, Ishikawa diagram and a 5-why analysis, in combination with time studies and interviews, the current state of the studied system was successfully mapped and analysed. With the help of the current state analysis, which served as a conceptual model, a simulation model of the current state was created in order to handle the large variety and the complexity of the system. The simulation model was validated and verified in order to ensure that it was “good enough” for the purpose of this project in the depiction of the real world system. During the experimental design, several improvement suggestions were created by utilizing methods such as brainstorming, Ishikawa diagram and a 5-why analysis. In a Kaizen event, onsite personnel had the opportunity to decide which suggestions that was fit for experimentation using simulation. With the result of the Kaizen event, experiments were performed in order to evaluate the proposed improvement suggestion. As a result, several new insights regarding improvements could be obtained, which provided several suggestions for an improved future state. Including a proposed automated cell. The analysis of the results did not entirely satisfy the aim of the project since certain factors could not be analysed, therefore the authors recommend that further studies are needed if proposed improvement suggestions are to be implemented.

1234567 51 - 100 of 1609
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf