| 1. |
- Abut, Hüseyin, et al.
(författare)
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Real-World Data Collection with UYANIK
- 2009
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Ingår i: In-Vehicle Corpus and Signal Processing for Driver Behavior. - Boston, MA : Springer. - 9780387795812 - 9780387795829 ; , s. 23-44
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 2. |
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| 3. |
- Adolfsson, Petra, et al.
(författare)
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Closing words!
- 2009
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Ingår i: Guiding and guided tours. - Göteborg : BAS Publishers. - 9789172462854 ; , s. 215-217
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 4. |
- Afzal, Wasif
(författare)
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Search-based approaches to software fault prediction and software testing
- 2009
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Software verification and validation activities are essential for software quality but also constitute a large part of software development costs. Therefore efficient and cost-effective software verification and validation activities are both a priority and a necessity considering the pressure to decrease time-to-market and intense competition faced by many, if not all, companies today. It is then perhaps not unexpected that decisions related to software quality, when to stop testing, testing schedule and testing resource allocation needs to be as accurate as possible. This thesis investigates the application of search-based techniques within two activities of software verification and validation: Software fault prediction and software testing for non-functional system properties. Software fault prediction modeling can provide support for making important decisions as outlined above. In this thesis we empirically evaluate symbolic regression using genetic programming (a search-based technique) as a potential method for software fault predictions. Using data sets from both industrial and open-source software, the strengths and weaknesses of applying symbolic regression in genetic programming are evaluated against competitive techniques. In addition to software fault prediction this thesis also consolidates available research into predictive modeling of other attributes by applying symbolic regression in genetic programming, thus presenting a broader perspective. As an extension to the application of search-based techniques within software verification and validation this thesis further investigates the extent of application of search-based techniques for testing non-functional system properties. Based on the research findings in this thesis it can be concluded that applying symbolic regression in genetic programming may be a viable technique for software fault prediction. We additionally seek literature evidence where other search-based techniques are applied for testing of non-functional system properties, hence contributing towards the growing application of search-based techniques in diverse activities within software verification and validation.
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| 5. |
- Akbari, Keramatollah, 1961-
(författare)
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Impact of Radon Ventilation on Indoor Air Quality and Building Energy saving
- 2009
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Industrial living is caused much people do live and work in closed and confined places; offices and residential buildings. This is why in this new world more fresh air which is generally provided by forced ventilation plays a vital role in living of human being. Furthermore because of many different indoor pollutants, like radon and artificial pollutants, the amount of fresh air and in turn the energy consumption has increased. This energy consumption related to ventilation has reached up to about 30 percent of energy used of building section. So making interaction between indoor air quality (IAQ) and optimization of energy saving is a necessary work. Radon as a natural pollutant is occurred in environment and in many countries threatens people health whereas is called the second causes of cancer. For reducing radon concentration in residential building at the acceptable level forced ventilation is used usually. Ventilation can improve IAQ but in the other side would increase the energy consumption in building sector and just now the contribution of ventilation exceeds up 50 percent of building sector's share. The aim of this thesis is to study the impact of ventilation on indoor radon by using Computational Fluid Dynamics (CFD) to achieve indoor air quality and energy efficiency. Application of CFD as a new technology, because of its cost and time savings, and on the other side, of its flexibility and precision is increasingly grown and can be used as a very important and valuable tool for the prediction and measurement of radon distribution in a ventilated building . Currently, measurement techniques and proposed standards and regulations of indoor pollutants and ventilation, particularly related to indoor radon cannot be able to provide a secure, safe and energy efficient indoor climate. This is why the indoor airflow distribution is very complex and with changing building geometry and operation condition, the treatment of air flow pattern, substantially would be changed, whereas the rules are usually independent of the buildings features. Furthermore, the indoor standards and regulations are based on average amount of pollutants in a room, whereas the pollutant distributions aren't identical and are varied throughout the room. Then the current techniques aren't so exactly valuable and acceptable. From different methods which is privilege to control pollutants, ventilation method is applicable in existing buildings. Designing effective ventilation can reduce radon concentration to very level low with regarding energy conservation remarks. This thesis presents results from simulation studies on ventilation and radon mitigation in residential buildings, in view points of indoor air quality and energy savings. The CFD technique is applied to predict, visualize and calculate of mixture radon-air flow. The distribution of indoor radon concentration, air velocity and room temperature also have considered together for achieving indoor air quality and energy saving. The results are also compared with the experimental data and related previous works. It was found that with increasing ventilation rate, the radon concentration is decreased, but the location of ventilation system is also important. From the simulation results, it is observed that within the ventilated room, there are some zones, which are good for living and somewhere is more polluted. The traditional radon detectors basically show the average value of radon content in 1m3 of air. That is why detector measuring is not exact and safe. Simulation results proved that floor heat can be supported ventilation effect and speed up the mixture movement. Floor heating reinforces the buoyancy effect, which is useful to reduce radon content in the floor (seating area) and then lower ventilation rate can be applied.
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| 6. |
- Alsin, Ulla, 1960-, et al.
(författare)
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Bedömning för kontroll eller utveckling?
- 2009. - 1:1
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Ingår i: Lärande på vuxnas vis. - Lund : Studentlitteratur. - 9789144042763 ; , s. 101-121
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 7. |
- Andersson Schaeffer, Jennie, 1974-
(författare)
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Rumslig omgestaltning : – en visuell signal i förändringsprocesser
- 2009
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- AbstractDetta är en teknisk rapport om en fallstudie, utförd på en utvecklingsverkstad, 2007-2008. Som metod användes intervju, enkätundersökning, studier av tryckt material och arkitekturanalys. En rumslig förändring kopplas till aspekter som orientering, professionalitet, den anställdes känsla av värde för företaget, motivation och status. Andra aspekter i studien är rumslig gestaltning som signal för förändring, nöjda medarbetare, trivsel, framtid, attraktiv arbetsplats, verkstad i världsklass och effektivitet. Resultatet indikerar att en rumslig förändring i den studerade utvecklingsverkstaden fungerar som en positiv visuell signal för en pågående förändringsprocess när det gäller organisation på avdelningen som helhet. I det empiriska resultatet har det blivit tydligt att förändringar av rumsliga element starkt kan förknippas med – och vara ett resultat av – agerad information (Bates, 2006). De övertygelser och förhoppningar som genomsyrar avdelningens ledning visar sig i form av effekter i de rumsliga elementen. I slutsatsen diskuteras studiens resultat kort i relation till Hawthornestudien (Mayo, 1933).
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| 8. |
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| 9. |
- Asp, Margareta, et al.
(författare)
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Trötthet, vila och sömn
- 2009. - 1:a
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Ingår i: Omvårdnadens grunder.. - Lund. - 9789144048765 ; , s. 417-487
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 10. |
- Aysan, Hüseyin
(författare)
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New Strategies for Ensuring Time and Value Correctness in Dependable Real-Time Systems
- 2009
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Dependable real-time embedded systems are typically composed of a number of heterogeneous computing nodes, heterogeneous networks that connect them and tasks with multiple criticality levels allocated to the nodes. The heterogeneous nature of the hardware, results in a varying vulnerability to different types of hardware failures. For example, a computing node with effective shielding shows higher resistance to transient failures caused by environmental conditions such as radiation or temperature changes than an unshielded node. Similarly, resistance to permanent failures can vary depending on the manufacturing procedures used. Vulnerability to different types of errors of a task which may lead to a system failure, depends on several factors, such as the hardware on which the task runs and communicates, the software architecture and the implementation quality of the software, and varies from task to task. This variance, as well as the different criticality levels and real-time requirements of tasks, necessitate novel fault-tolerance approaches to be developed and used, in order to meet the stringent dependability requirements of resource-constrained real-time systems. In this thesis, the major contribution is four-fold. Firstly, we describe an error classification for real-time embedded systems and address error propagation aspects. The goal of this work is to perform the analysis on a given system, in order to find bottlenecks in satisfying dependability requirements and to provide guidelines on the usage of appropriate error detection and fault tolerance mechanisms. Secondly, we present a time-redundancy approach to provide a priori guarantees in fixed-priority scheduling (FPS) such that the system will be able to tolerate one value error per every critical task instance by re-execution of every critical task instance or execution of alternate tasks before deadlines, while keeping the associated costs minimized. Our third contribution is a new approach, Voting on Time and Value (VTV) which extends the N-modular redundancy approach by explicitly considering both value and timing errors, such that correct value is produced at a correct time, under specified assumptions. We illustrate our voting approach by instantiating it in the context of the well-known triple modular redundancy (TMR) approach. Further, we present a generalized voting algorithm targeting NMR that enables a high degree of customization from the user perspective. Finally, we propose a novel cascading redundancy approach within a generic fault tolerant scheduling framework. The proposed approach is capable of tolerating errors with a wider coverage (with respect to error frequency and error types) than our proposed time and space redundancy approaches in isolation, allows tasks with mixed criticality levels, is independent of the scheduling technique and, above all, ensures that every critical task instance can be feasibly replicated in both time and/or space. The fault-tolerance techniques presented in this thesis address various different error scenarios that can be observed in real-time embedded systems with respect to the types of errors and frequency of occurrence, and can be used to achieve the ultra-high levels of dependability which is required in many critical systems.
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