<p>There is no debate over the importance of IT security. Equally important is the research on security assessment; methods for evaluating the security of IT systems. The Swedish Defense Research Agency has for the last couple of years been conducting research on the area of security assessment. To verify the correctness of these methods, tools are implemented.</p><p>This thesis presents the design and implementation of an environment to support and aid future implementations and evaluations of security assessment methods. The aim of this environment, known as the New Tool Environment, NTE, is to assist the developer by facilitating the more time consuming parts of the implementation. A large part of this thesis is devoted to the development of a database solution, which results in an object/relational data access layer.</p>

<p>If a fault occurs in a technical system, for example in an airplane, it is important to beable to detect that there is a fault and to find what in the system that is faulty. Theprocedure of determining, given certain observations, if faults are present and if so thelocation of faults is called a diagnosis. For achieving diagnosis we can use computersoftware that takes observations of a system as input and that generates a diagnosis asoutput. This is called a diagnostic system. To build a diagnostic system we needanother piece of computer software which is called a diagnostic tool. This thesis willpresent a market survey for diagnostic tools as well as an analysis of three of the toolsfound in the survey. The analysis can be seen as constituted by two different aspects,one focusing on the diagnostic methods with which each tool creates diagnosticsystems, the other focusing on practical details that determine the usability of eachtool. The analysis found that the largest differences were between the methods used increating the diagnostic systems.</p>

published_or_final_version / Industrial Engineering / Doctoral / Doctor of Philosophy

Thermal mass can be used in buildings to reduce the need for and dependence on mechanical heating and cooling systems whilst maintaining environmental comfort. Active thermal mass strategies further enhance the performance of thermal mass through integration with the Heating, Ventilation and Air Conditioning (HVAC) systems. For the design of new buildings to include active thermal mass strategies, experience from operational projects and design guidelines are normally used by engineers. However, dynamic thermal modelling is required in most cases to accurately determine the performance of its integration with the environmental systems of the building. Design decisions made in the preliminary stages of the design of a building often determine its final thermal characteristics. At this stage, reasons for not integrating active thermal mass strategies include the lack of knowledge about the performance of previous buildings and the time and resources required to carry out detailed modelling. In this research project a commercially available dynamic building thermal program has been used to construct models for active thermal mass strategies and compare the results with monitored temperatures in buildings incorporating the strategies in the UK. Four active thermal mass strategies are considered (a) hollow core slabs (HCS), (b) floor void with mass, (FVWM) (c) earth-to-air heat exchanger (ETAHE) and (d) thermal labyrinth (TL). The operational strategies and monitoring are presented and their modelling is described in terms of geometrical configuration and input parameters. The modelling results are compared with the measured parameters successfully. Using the calibrated model, an excel based tool (TMAir) was then developed that can be used at the concept design stages of a typical office building to determine the benefits of integrating an active thermal mass strategy. Key design parameters were identified for each system. These parameters can be split into two categories; fixed parameters and user selected parameters. The fixed parameters are pre-selected for the design tool and have to be a fair representation of the projects that the tool will be used for. The user selected parameters are chosen by the user to represent the way the building will be used, and to look at the effect of key design decisions on the performance of the building. The tool has an easy-to-use interface which allows direct comparison of the different active thermal mass strategies together with the effects of changing key design parameters. Results are presented in terms of thermal comfort and energy consumption. TMAir has then been used to carry out a series of parametric analyses. These have concluded the following:  There is only a benefit in integrating a HCS strategy when night cooling is introduced  There is no benefit in integrating a FVWM strategy when only one parameter is improved  An ETAHE and TL strategy will always provide a benefit, although the benefits are greater when night cooling is introduced, solar and internal gains are reduced and when the air change rate is increased. When all of the parametric improvements are applied to the test room the results show that all of the active thermal mass strategies can provide a reduction in annual overheating hours when compared to the Standard Strategy. Only a small benefit is found for the FVWM Strategy, however around a 25% reduction is found for the HCS Strategy, over a 50% reduction for the TL Strategy and nearly a 75% reduction for the ETAHE Strategy. This demonstrates the importance of applying a low energy, passive approach when considering the application of active thermal mass strategies. The key results have shown that when comfort cooling is provided, adding a HCS or FVWM strategy always results in an increase in the annual cooling load. This is as a result of the temperature of the air being supplied into the cores or floor void being higher than that of the internal surface temperatures of the cores or void. This results in the supply air being heated, and less cooling provided to the test room per cooling energy delivered. Due to the pre cooling effect of the ETAHE and TL strategies, these strategies always result in a reduction in the annual cooling load. The key results have shown that the annual heating load is reduced by a small amount for the HCS and FVWM strategies unless the solar gains or internal gains are reduced, whereas the ETAHE and TL strategies always result in a around a 10% reduction in annual heating load as a result of the preheating effect these strategies have on the supply air.

No description available.

Real-time networks are traditionally built on proprietary standards, resulting in a interoperability issues between different real-time netork implementations and traditional data networks mainly used in back office operations. Continuity and supplier independence are a cause of concern with current proprietary real-time networks. This project evaluates the capability of providing real-time traffic over switched Ethernet with EDF scheduling algorithm implemented at both the switch and the node. By using OMNET simulation tool at packet level, it is shown that the EDF implementation in switched Ethernet can guarantee real-time traffic over the network and at the same time supporting non real-time traffic.

Computers are being employed in a variety of ways by a variety of individuals to create imagery. Much work has been done to accurately model natural phenomena in the context of computer graphics as well as model specific artists' tools and techniques. Focusing on the dynamics of water flow across surfaces, it is the goal of this work to develop a physically inspired texturing tool that allows artists to create interesting staining and wearing effects on surfaces. Weathering or the wearing down of materials by natural forces can create complex and beautiful patterns on a variety of surfaces. In this process lies the very essence of the creative act. To distill the essence of the elements of the water staining process, we employ a computer generated particle system in a phenomenological model. The motion of these particles is controlled by physically based constraints, such as wind, gravity, mass, etc. The way in which each particle interacts with or modifies the look of the surface is further controlled by parameters such as surface roughness, surface color and surface hardness. Each particle can remove or deposit material as it flows across the surface, creating complex patterns.

On behalf of Inspectera HK AB in Norrköping a web-based drawing tool has been developed in Java, mainlywith the library Google Web Toolkit (GWT). The purpose of this tool is to facilitate both the staff's at Inspecteraand their client's work with different types of drawings such as blueprints for pest control, fire protection andespecially drawings of the company's e-service of self-checks. Besides developing the drawing tool usabilitytesting and a usability evaluation has been performed.

In this master thesis the advanced design methodology is presented by which information systems requirements represented with precise UML models are transformed to project. The first section describes a research of five existing MDA tools comparison according to evaluation criteria. This criteria covers model to model and model to code transformations approach, platform of generated code and integration with UML CASE tools abilities. For requirements model transformation to design, plug-in for CASE tool MagicDraw is created according MDA standards. Model transformation plug-in takes system requirement model as input and generates design model. In this way it is possible to implement design methods that have explicit design rules. Created plug-in requirements, functional specification and architecture described in Project section. The investigation section describes investigation of the developed plug-in. In this section were investigate the working efficiency of designer increasing and the quality of design models ensuring with create MagicDraw plug-in.

The key aim of the designed system is to create the e-teaching and e-learning tool to be applied for the studies of the module “Designing Hypertext Systems”, taught at the Faculty of Business and Technologies of Utena College. The major objective of the system is to facilitate the studies of the abovementioned module and ease the communication between professors and students, who are not able to attend lectures due to reasonable excuses, as well as part-time students. Seeking to clarify the relevance of the designed tool, as well as the need for it and, in pursuance of its efficiency, the following directional issues have been analysed: institutions that organise training based on distance technologies; spheres that cover the majority of offers for such training; tools that are accessible to all the persons requesting them; the number of offers in relation to particular title of the designed system “Designing Hypertext Systems”; its accessibility to common users and conformity of its contents to the contents of the mentioned module; advantages and disadvantages of distance education; possibilities to make use of the system for presumptive users of the system, their motivation, requests and proposals; supply of website design tools, educational material for e-teaching, as well as training methodology. In addition to that, the analysis of the already existing decisions has been also carried out. In the result of what, conclusions have been drawn on the fact that designing of... [to full text]