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Beginning Database Design, Second Edition provides short, easy-to-read explanations of how to get database design right the first time. This book offers numerous examples to help you avoid the many pitfalls that entrap new and not-so-new database designers. Through the help of use cases and class diagrams modeled in the UML, you’ll learn to discover and represent the details and scope of any design problem you choose to attack.
Database design is not an exact science. Many are surprised to find that problems with their databases are caused by poor design rather than by difficulties in using the database management software. Beginning Database Design, Second Edition helps you ask and answer important questions about your data so you can understand the problem you are trying to solve and create a pragmatic design capturing the essentials while leaving the door open for refinements and extension at a later stage. Solid database design principles and examples help demonstrate the consequences of simplifications and pragmatic decisions. The rationale is to try to keep a design simple, but allow room for development as situations change or resources permit.
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Seminar paper from the year 2001 in the subject Computer Science - Programming, grade: 90%, UNITEC New Zealand (Departement of Information Systems and Computing), course: Managing Information Technology Projects, 3 entries in the bibliography, language: English, abstract: In April 1994 the insurance company Giga Safe Corp. started a software development project. Its goal was to develop a software to automate medical insurance quotes. It was scheduled as a six-month project and should be ready by January 1, 1995, when Giga Safe's new rates were to be released. However, although the project started with a highly motivated team and high expectations, it missed all deadlines and was not completed until May 1995. To sum things up, the project failed mostly because of bad scheduling and planning, as well as insufficient management control and decreasing team morale. With a more structured approach to project management and better planning the project could have been completed in a shorter time.
Seminar paper from the year 2001 in the subject Computer Science - Programming, grade: 93%, UNITEC New Zealand (Departement of Information Systems and Computing), course: Managing Information Technology Projects, 2 entries in the bibliography, language: English, abstract: Software Corp. has been hired by the Johannes Gutenberg University in Mainz, Germany to develop an online knowledge-sharing platform for its students. The contract has been signed on the 27th of August 2001 and the project must be completed by the 22nd of October 2001. This is due to the university's promise to provide the system before the semester's first exams take place. This proposal examines the details of the project in order to make it run smoothly. It addresses the issues of the project's scope, activities that have to be conducted throughout the project, financial feasibility, scheduling, and the project's viability. To sum things up, we consider the project as feasible and relatively easy to realize. The timeframe is sufficient and the project will provide a return on investment of about 39%, which is outstanding. The project's risks can be considered as relatively low. Providing the expected functionality will be a challenge, but is definitely achievable because we have exactly the right people and enough time to complete this task.
Master's Thesis from the year 2002 in the subject Computer Science - Applied, grade: 2,3 (B), Technical University of Berlin (Institute for Machine Tools and Factory Management (IWF)), 59 entries in the bibliography, language: English, abstract: Integration of a CAx (Computer Aided x) system throughout the product life cycle and among different enterprises is a major issue for industrial competitiveness and collaboration. One of the main successful factors for CAx system integration is efficient methodology for EPDE (Engineering Product Data Exchange). Data exchange is the totality of establishing the approach for and the successful achievement of the transfer of data between two distinct CAx systems. Problem Statement: - Why does an exchanged CAD (Computer Aided Design) model lose some modelling properties? - Especially losses such as model tree (design intent) and features. - What reasons influence that phenomenon? - How can these losses be minimized? 2. Review state of the art of exchange strategies The review of exchange strategies is focused on which existing approaches are in use today, which capabilities are supported by them, which deficiencies they have, an understanding of state of the art is a precondition for beginning to deal with of the problem statement. 3. Analysis of modelling capabilities regarding feature modelling and structure representation The analysis begins with a short review of existing feature modelling techniques, which will build up a framework for the analysis process. Three CAD systems are analysed - Pro/Engineering, I-DEAS and UniGraphics. Typical models, with the frequently occurring features, are reviewed depending on the feature modelling method and structural representation. 4. Needs-identification The results of the analysis of modelling capabilities lead to the improvement of new methods and techniques. This defines the essential basis for the building of a concept framework. 5. Requirement definitions - How can the model-tree to be exchanged? - How will the exchanged model-tree act? 6. Outline of the thesis The material is organized in three major sections. The first one, the state of the art, examines the fundamentals of exchange approaches, the current state of scientific and commercial exchange approaches and further related technologies. The second one, presents the current state of feature modelling techniques and analyses of three commercial CAD systems according to feature modelling capabilities and structural representation. The next section, the concept framework, designs a concept framework fitting the requirement definitions....
Research paper from the year 2005 in the subject Computer Science - Applied, grade: Approved, Technical University of Chemnitz, 15 entries in the bibliography, language: English, abstract: This work is based on a diploma thesis by Changxing Dong [Dong04]. In [Dong04], the effects of different shapespaces on the behaviour of artificial immune system algorithms are evaluated. For that purpose a pattern recognition task was used. In this case, chinese characters should be learned and recognized. Each character was adapted individually using theCLONALGalgorithm [dCT02]. The resulting set of antibody patterns, the duration of running the algorithm and the quality of recognition were then used to evaluate the differences between the different shapespaces.
Diploma Thesis from the year 2006 in the subject Computer Science - Applied, grade: 1.0, University of Weimar (Faculty of Media), 76 entries in the bibliography, language: English, abstract: Reconstruction of real-world scenes from a set of multiple images is a topic in Computer Vision and 3D Computer Graphics with many interesting applications. There exists a powerful algorithm for shape reconstruction from arbitrary viewpoints, called Space Carving. However, it is computationally expensive and hence can not be used with applications in the field of 3D video or CSCW as well as interactive 3D model creation. Attempts have been made to achieve real-time framerates using PC cluster systems. While these provide enough performance they are also expensive and less flexible. Approaches that use GPU hardware acceleration on single workstations achieve interactive framerates for novel-view synthesis, but do not provide an explicit volumetric representation of the whole scene. The proposed approach shows the efforts in developing a GPU hardware-accelerated framework for obtaining the volumetric photo hull of a dynamic 3D scene as seen from multiple calibrated cameras. High performance is achieved by employing a shape from silhouette technique in advance to obtain a tight initial volume for Space Carving. Also several speed-up techniques are presented to increase efficiency. Since the entire processing is done on a single PC the framework can be applied to mobile setups, enabling a wide range of further applications. The approach is explained using programmable vertex and fragment processors with current hardware and compared to highly optimized CPU implementations. It is shown that the new approach can outperform the latter by more than one magnitude.
Diploma Thesis from the year 2007 in the subject Computer Science - Applied, grade: 1,0, Friedrich-Alexander University Erlangen-Nuremberg (Lehrstuhl für Mustererkennung), 66 entries in the bibliography, language: English, abstract: Far reaching developments and technical advances took place within the field of radiotherapy in the last years. Radiotherapy within the chest and abdomen area is especially important in the field of radiotherapy. Within this regions, organ and tumor positions are significantly affected by patient respiration. The tumor motion, caused due to respiration is compensated by extending the treated area. This extension covers all possible positions of the tumor and therefore also includes healthy tissue.
Several clinical studies provide evidence of a survival advantage for higher dose levels. To spare a maximum of healthy tissue physicians use 'gated radiotherapy'. Common recent approaches for gated radiotherapy are based on the observation of a surrogate. This either can be an implanted fiducial marker or an external signal, which is trying to capture the patients' respiration.
Within this thesis principles and methods of 'gated radiotherapy' are described. Additionally an overview of recent patents and products related to radiotherapy are presented and advantages and disadvantages of both common approaches are discussed. This discussion leads to a new developed method, which is introduced. The method joins advantages of both known methods but disregards their disadvantages. The developed algorithm is using image guided methods and methods of medical image processing. A mapping between a 4D-CT planning volume and a most recent acquired fluoroscopic sequence of the same patient is calculated before treatment. Using this mapping and an external breathing signal the physician can define gating intervals and treat the patient in certain breathing phases.
The developed algorithm is included in an existing prototype developed by Siemens Corporate Research (SCR) in Princeton, NJ, USA. Using this prototype, the application of the method is shown. Furthermore another prototype to acquire respiration synchronized fluoroscopic sequences is developed. Both applications are introduced within this thesis....
Seminar paper from the year 2005 in the subject Computer Science - Software, grade: 1,3, Free University of Berlin (Institut für Mathematik und Informatik), course: Open Source Software Engineering, 11 entries in the bibliography, language: English, abstract: This paper will show the problematic aspects of Open Source Software by looking behind the scenes and unveiling its mask of a happy and satisfied world of cooperating hobby-programmers with an enormous creative potential.