Lin, Minghong. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2008. / Includes bibliographical references (p. 49-51). / Abstracts in English and Chinese. / Abstract --- p.i / Acknowledgement --- p.v / Chapter 1 --- Introduction --- p.1 / Chapter 2 --- A Stochastic Framework --- p.5 / Chapter 2.1 --- Model Description --- p.5 / Chapter 2.2 --- Altruistic File Sharing System with Download Con- straint --- p.7 / Chapter 2.2.1 --- Model Formulation --- p.8 / Chapter 2.2.2 --- Steady State Analysis --- p.9 / Chapter 2.3 --- Altruistic File Sharing System with Download and Upload Constraints --- p.14 / Chapter 2.3.1 --- Model Formulation --- p.14 / Chapter 2.3.2 --- Steady State Analysis --- p.15 / Chapter 2.4 --- Incentive File Sharing via Coordinated Matching --- p.18 / Chapter 2.4.1 --- Without Incentive Mechanism --- p.18 / Chapter 2.4.2 --- With Incentive Mechanism --- p.19 / Chapter 2.5 --- Simulation --- p.23 / Chapter 3 --- An ISP-friendly Protocol --- p.28 / Chapter 3.1 --- Simple Mathematical Models --- p.28 / Chapter 3.1.1 --- Assumptions --- p.29 / Chapter 3.1.2 --- Homogeneous Case Analysis --- p.30 / Chapter 3.1.3 --- Heterogeneous Case Analysis --- p.31 / Chapter 3.1.4 --- Flash Crowd Analysis --- p.32 / Chapter 3.2 --- An ISP-friendly BitTorrent Protocol --- p.33 / Chapter 3.3 --- Performance Evaluation & Measurements --- p.36 / Chapter 3.3.1 --- Choice of the BitTorrent Client --- p.37 / Chapter 3.3.2 --- Experimental Setup --- p.37 / Chapter 3.3.3 --- Regular Peer Arrival --- p.38 / Chapter 3.3.4 --- Flash Crowd --- p.41 / Chapter 3.4 --- Black Hole Security Attack --- p.42 / Chapter 4 --- Related Work --- p.46 / Chapter 5 --- Conclusion --- p.48 / Bibliography --- p.49 / Appendix --- p.52

Typescript (photocopy). / Digitized by Kansas Correctional Industries

The performance of SPICE and Network C (NC) circuit simulator when simulating MOS transistor circuits has been investigated and compared. SPICE analog model, NC analog model and NC MOS_PWL model are the three MOS transistor models being used. The comparison between SPICE and NC includes five areas. They are MOS transistor model, circuit analysis and computational methods, limitation on the ability to simulate circuits containing the MOS transistor diode configuration, run time and the ability to build new circuit component models using derived equations.

S3 (Softwood Sawmill Simulator) is a sawmill simulation system for modeling the operations of Pacific Northwest softwood lumber mills. S3 consists of three main parts. The first part is the framework for construction of the sawmill layout. The second part focuses on individual machine centers, their process and down times, and their interconnections. The third part consists of databases for raw material and final products. S3 inputs process logic from external data files. All parts are integrated in an object-oriented framework. The system was developed using the object-oriented environment, Actor. All data input and output are through database files in dBASE IV format. S3 can model a sawmill represented by the machine center and connection types defined in S3. The size of the model is controlled by the Actor programming environment. The construction of a sawmill model is demonstrated. / Graduation date: 1993

This research compared the effectiveness of an interactive video training program with an instructor-led program for teaching working adults the personal computer (PC) application WordPerfect. The objectives of the study were to develop a research methodology and instrumentation in order to determine whether instructor-led training resulted in significantly different reaction, performance, and post-training use than interactive video instruction and to utilize the findings to suggest strategies for teaching working adults PC applications. The study was based on the need to comparatively evaluate various instructional approaches for teaching PC applications to working adults. There is also an underlying need in computer training is for easily administered, yet comprehensive evaluation methodologies. There were 111 individuals in the original sample. Half were randomly assigned to a interactive video group and half to an instructor-led group. After initial dropouts there were 53 individuals in the instructor-led group and 47 in the interactive video group. Instructional objectives, content and topic sequence were the same for both groups. A pilot study was conducted to confirm the reliability and validity of the instruments and methodology. A demographic questionnaire was completed at the beginning of an initial training session. At the end of the first training session a performance test and a reaction questionnaire were completed. After two to three weeks a use survey, a knowledge test, and a performance test were completed. Descriptive and analytic statistics were prepared for the dependent variables (reaction, performance, and post-training use) and covariates (age, gender, occupation, organization, education, and prior use). Null hypotheses of no difference were rejected when the significance was less than .05. Results indicated no significant differences in performance between the groups after either the first training session or after two to three weeks. However, results indicated significant differences (p = .0004) in reaction with the instructor-led group rating the training better overall. The instructor-led group also indicated that the clarity and usefulness of the course materials was better (p = .035). Significant differences were also found in post-training use (p = .036). / Graduation date: 1991

No description available.

This project involved porting a Graphical Software Package (GSP) from the proprietary IDS-BO Gerber CAD system onto a more modern computer that would allow student access for further study and development. Because of the popularity of Unix as an "open systems environment", the computer chosen was an HP9000 using the HP-UX operating system. In addition, it was decided to implement a standard Graphical Kernel System (GKS) interface to provide further portability and to cater for the expected growth of the GKS as an international standard. By way of introduction, a brief general overview of computer graphics, some of the essential considerations for the design of a graphics package and a description of the work undertaken are presented. Then follows a detailed presentation of the two systems central to this project i) the lDS-8O Gerber proprietary CAD system, with particular attention being paid to the Graphical Software Package (GSP) which it uses and ii) the Graphical Kernel System (GKS) which has become a widely accepted international graphics standard. The major differences between the lDS-8O Gerber GSP system and the GKS system are indicated. Following the theoretical presentation of the GSP and GKS systems, the practical work involved in first implementing a "skeleton" GKS interface on the HP9000 Unix System, incorporating the existing Advanced Graphics Package (AGP) is presented. The establishment of a GKS interface then allows an lDS-8O Gerber GSP interface to be developed and mapped onto this. Detailed description is given of the methods employed for this implementation and the reasons for the data structures chosen. The procedures and considerations for the testing and verification of the total .system implemented on the HP9000 then follow. Original lDS-8O Gerber 2-D .applications software was used for the purpose of testing. The implementation of the data base that this software uses is also presented. Conclusions on system performance are finally presented as well as suggested areas for possible further work. / Thesis (M.Sc.)-University of Natal, Durban, 1989.

The Design Metrics Research Team at Ball State University has developed a quality design metric D(G), which consists of an internal design metric Di, and an external design metric De. This thesis discusses applying design metrics to the ROCC-Radar On-line Command Control project received from Harris Corporation. Thus, the main objective of this thesis is to analyze the behavior of D(G), and the primitive components of this metric.Error and change history reports are vital inputs to the validation of design metrics' performance. Since correct identification of types of changes/errors is critical for our evaluation, several different types of analyses were performed in an attempt to qualify the metric performance in each case.This thesis covers the analysis of 666 FORTRAN modules with approximately 142,296 lines of code. / Department of Computer Science

The G-Net research group at Ball State University previously developed a graph editor, written in Java, with limited algorithm support. This editor was modified until the code had the instability of a legacy system. It was decided that, rather than continue working with the old system, a new version would be created.The enhancements planned for this new version were more efficient data structures, easy addition of new algorithms, and animated algorithm output. Additionally, the new version was to be written in compliance with the latest Java standards. This paper describes the structure of this new program, Jedit3.1. An overview of the structure of the program and detailed descriptions of the material that future programmers will need to understand in order to add new algorithms is included. Appropriate descriptions are included for files that future programmers should understand but not necessarily modify. / Department of Computer Science

There are increasing demands for graphics-oriented software packages for graph theory teaching and research. G-Net, a departmental research project headed by Dr. Jay Bagga, is an effort to create a software package that comprises of a graph database, a graph editor, 'and a collection of graph algorithms. Also, with widespread use of the World Wide Web, the graph editor should be accessible through the Web. Taking these issues into consideration Jedit (Java Graph editor) is developed. This thesis concentrates on the design and implementation of a graph editor and a graph object (Jgraph). Jgraph is developed in java to implement the graph algorithms in future. One of the unique features of this graph editor is that it can be used as stand-alone application or as an applet for the Web. In addition, it also provides a friendly user interface. / Department of Computer Science