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| 3. |
- Gustavsson Christiernin, Linn, 1979-, et al.
(författare)
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Easylayer : MLD in an application portal with multiple user groups
- 2007
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Ingår i: Proceedings of the Iadis International Conference Applied Computing 2007. - : IADIS. - 9789728924300 ; , s. 27-34
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- In large organizations there are usually rather large groups of heterogeneous users with different tasks and different needs. Their requirements would most likely vary a lot when the system is designed to grant them access to different parts of the functions and applications In our earlier work we have tested the interface concept of Multi-Layered Design (MLD) on an operating system where each layer had a set of applications and tools. The users working with the system could get access to different applications depending on their level of experience or their different needs. The current paper presents how the MLD concept is taken one step further; implementing a layered design in a multi-user portal on a Citrix server. When a network solution is used, new available possibilities are given. The MLD approach can be combined with a role based access technique can the layered structure can be used in different ways for many different groups of users. In the study a MLD mushroom structure is employed where the user category decides the set of layers the different user groups can choose from while the individual user’s tasks and experience guide the choice of the specific layer. Thin clients are used to access the layer structure and five personas are made to represent the potential user groups. The results show that MLD can be used within a Citrix environment and that it is a viable alternative or complement for multi-user portals
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| 4. |
- Gustavsson Christiernin, Linn, 1979-, et al.
(författare)
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Reliability and Quality of Software Engineering in Manufacturing Industry : a case study
- 2008
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Ingår i: 19th International Symposium on Software Reliability Engineering (ISSRE 2008.). - : Institute of Electrical and Electronics Engineers ( IEEE ). - 9781424436538
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Konferensbidrag (refereegranskat)abstract
- Software engineering has proposed the use of formal and industrial methods, models and tools within software industry for some time now. There are several good examples like the aircraft industry, branches of the military, the space shuttle development and the nuclear power plant industry that have come a long way with their software processes. However, there is still an ongoing dilemma of how to better introduce software processes within most regular production industry. In this paper we try to summaries our experiences of software processes and quality systems within the vehicle industry of northern Europe. A first investigating case study is conducted at a large software consulting company, focused on industrial software, and then we further investigate the software situation at one of the largest vehicle manufacturers in Scandinavia. We use a ten point list with adapted metrics to evaluate process quality and create a progress report of the work-flow and process implementation rate. Based on our results from the evaluation we also provide a first set of guidelines for how to level the differences in quality processes for hardware and software development.
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| 8. |
- Calås, Göran, et al.
(författare)
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A First Draft of RATF : A Method Combining Robustness Analysis and Technology Forecasting
- 2006
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Ingår i: Information Technology: New Generations, 2006. ITNG 2006. Third International Conference on. - 0769524974 ; , s. 72-77
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This paper is based on an extensive study performed on a large software suite for over a decade. From the experiences derived from this study we created a first draft of a method combining an extended robustness analysis (RA) method with the future oriented method of technology forecasting (TF). In this method TF provides information about the systems future evolution to the RA which then generates the software design. The RA and TF methods then form a feedback loop, which results in an improved reusable and robust software design. The purpose of the RATF method is to predict the evolutional path of the software system, thus making preparations for (example) functionality that will be needed in future generations, i.e. utilizing the power-of-prediction to implement the base of tomorrow's functions today
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| 9. |
- Calås, Göran, et al.
(författare)
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Combining robust analysis and technology forecasting : A missing combination in contemporary methods
- 2006
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Ingår i: Proceedings of the IASTED International Conference on Software Engineering. - Innsbruck. - 0889865744 - 9780889865747 ; , s. 329-334
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Seven software engineering methods and one general purpose system engineering method TRIZ was evaluated concerning their abilities to combine software technology forecasting, that is prediction of potential software evolution with robustness analysis, which is a method to model a system tolerant to changes. None of the investigated software engineering method or process concepts combines software technology forecasting with robustness analysis to any great extent. Several of the methods evaluated do contribute with techniques and principles, that potentially could be combined and give systematically technology forecasting with comprehensively robustness analysis though. This defines a new frontier for research into a combined "super class" method for software development.
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| 10. |
- de Blanche, Andreas, 1975-, et al.
(författare)
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Availability of Unused Computational Resources in an Ordinary Office Environment
- 2010
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Ingår i: Journal of Circuits, Systems and Computers. - 0218-1266. ; 19:3, s. 557-572
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Tidskriftsartikel (refereegranskat)abstract
- The study presented in this paper highlights an important issue that was subject for discussionsand research about a decade ago and now have gained new interest with the current advances ofgrid computing and desktop grids. New techniques are being invented on how to utilize desktopcomputers for computational tasks but no other study, to our knowledge, has explored theavailability of the said resources. The general assumption has been that there are resources andthat they are available. The study is based on a survey on the availability of resources in anordinary o±ce environment. The aim of the study was to determine if there are truly usableunder-utilized networked desktop computers available for non-desktop tasks during the off-hours. We found that in more than 96% of the cases the computers in the current investigationwas available for the formation of part-time (night and weekend) computer clusters. Finally wecompare the performance of a full time and a metamorphosic cluster, based on one hypotheticallinear scalable application and a real world welding simulation.
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| 11. |
- de Blanche, Andreas, 1975-, et al.
(författare)
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Method for Experimental Measurement of an Applications Memory Bus Usage
- 2010
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Ingår i: <em> </em>. - : CSREA Press.
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Konferensbidrag (refereegranskat)abstract
- The disproportion between processor and memory bus capacities has increased constantly during the last decades. With the introduction of multi-core processors the memory bus capacity is divided between the simultaneously executing processes (cores). The memory bus capacity directly affects the number of applications that can be executed simultaneously at its full potential. Thus, against this backdrop it becomes important to estimate how the limitation of the memory bus effects the applications performance. Towards this end we introduce a method and a tool for experimental estimation of an applications memory requirement as well as the impact of sharing the memory bus has on the execution times. The tool enables black-box approximate profiling of an applications memory bus usage during execution. It executes entirely in user-space and does not require access to the application code, only the binary.
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| 12. |
- de Blanche, Andreas, 1975-, et al.
(författare)
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Minimizing Total Cost ($$) and Maximizing Throughput : A Metric for Node versus Core Usage in Multi-Core Clusters
- 2010
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Ingår i: Proceedings of the International conference on Parallel and Distributed Processing Techniques and Applications. - Las Vegas : CSREA Press. - 1601321562 - 1601321570 ; , s. 241-248
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Konferensbidrag (refereegranskat)abstract
- When most commercial clusters had one processor core each, decreasing the runtime meant executing the application over more nodes – the associated cost (in $) would scale linearly with the number of nodes. However with the recent advances of multi-core processors the execution time can be increased by utilizing more nodes or by utilizing more cores in the same nodes. In the industrial cluster environments a key question is how to run the applications, to minimize the total cost while maximizing the throughput and solution times of the individual jobs. The number of core used and their contribution to the total runtime reduction is especially interesting since companies often use commercial software that is licensed per year and process. The annual license cost of one single process is often far greater than that of a complete cluster node including maintenance and power. In this paper we present a metric for the calculation of the optimal way to run an application on a cluster consisting of multi-core nodes in order to minimize the cost of executing the said job.
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| 13. |
- de Blanche, Andreas, 1975-, et al.
(författare)
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Multicore Clusters for CFD Simulations : Comparative Study of Three CFD-Softwares
- 2012
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Ingår i: PROCEEDINGS OFTHE 2012 INTERNATIONAL CONFERENCE ONPARALLEL AND DISTRIBUTED PROCESSING TECHNIQUES ANDAPPLICATIONS, PART II. - : CSREA Press. - 1601322275 - 1601322283 ; , s. 855-852
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Konferensbidrag (refereegranskat)abstract
- Multicore processors have come to stay, fulfill Moore’s law and might very well revolutionize the computer industry. However, we are now in a transitional period before the new programming models, numerical algorithms and general computer architecture have been developed and the software has been rewritten. This paper focuses on the effects multicore based systems have on industrial computational fluid dynamics (CFD) simulations. The most significant finding was that five of the models ran faster when only one process was executed on each multicore node instead of two. In these cases the execution time was increased by between 6.5% and 64% with a median increase of 10% when utilizing both cores.
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| 14. |
- Namaki, Nima, 1975-, et al.
(författare)
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A Tool for Processor Dependency Characterization of HPC Applications
- 2009
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Ingår i: Proceedings for the HPC Asia & APAN 2009. - Hsinchu, Taiwan : National Center for High-Performance Computing. - 9789868522800 ; , s. 70-76
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Konferensbidrag (refereegranskat)abstract
- In this paper we have implemented and verified Cpugen, a tool for characterization of processor resource utilization of HPC applications .Toward this end we implemented Cpugen, an application with good accuracy for processor load generation. Cpugen was verified through three different phases of passive, active and real world application measurements. The measurement results show that our implemented method is a viable option for non-intrusive, stable and robust load generation. The error range for all generated target loads are between 0.00% minimum and 1.04% maximum, with a median deviation of 0.11%. We can conclude that the method utilized in this investigation provides the ability to generate stable and robust processor load.
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| 15. |
- Namaki, Nima, 1975-, et al.
(författare)
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Exhausted Dominated Performance : Basic Proof of Concept
- 2010
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Ingår i: International conference on Parallel and Distributed Processing Techniques and Applications. - Las Vegas : CSREA. - 1601321562 - 1601321570 ; , s. 63-67
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Konferensbidrag (refereegranskat)
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| 16. |
- Namaki, Nima, 1975-, et al.
(författare)
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Exhaustion dominated performance : a first attempt
- 2009
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Ingår i: SAC '09. - New York, NY, USA : ACM. - 9781605581668 ; , s. 1011-1012
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Konferensbidrag (refereegranskat)abstract
- In this paper we present a first attempt to an analytical method to discover and understand how the available resources influence the execution time. Our method is based on a piecewise linear model for dominating execution limitations and black-box observations. We verify this analysis method by a set of real-world experiments. Finally, we conclude that the different effects follow a linear superposition within a certain range.
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| 17. |
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| 18. |
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| 19. |
- Torkar, Richard, et al.
(författare)
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Combining partition and random testing
- 2006
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Ingår i: Proceedings of the IASTED International Conference on Software Engineering, as part of the 24th IASTED International Multi-Conference on APPLIED INFORMATICS. - Innsbruck. - 0889865744 - 9780889865747 ; , s. 367-372
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Konferensbidrag (populärvet., debatt m.m.)abstract
- In this paper we evaluate the potential in combining different testing methodologies. The evaluation indicates an increase in effectiveness when adding random testing to partition testing. At the same time, the increase in efficiency inevitably fades because of the added number of random test cases being executed. Nevertheless, the potential in an automation scheme for creating and executing test cases is visible, thus indicating that a future implementation combining the best of two worlds, i.e. partition and random testing could be pursued.
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