by Yee Ka Chi. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1997. / Includes bibliographical references (leaves 101-[106]). / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Background --- p.1 / Chapter 1.1.1 --- Large Scale Switch Interconnections --- p.2 / Chapter 1.1.2 --- Multichannel Switching and Resequencing --- p.6 / Chapter 1.1.3 --- Scheduling --- p.7 / Chapter 2 --- Hierarchical Banyan Switch Interconnection --- p.12 / Chapter 2.1 --- Introduction --- p.12 / Chapter 2.2 --- Switch Architecture --- p.13 / Chapter 2.3 --- Switch Operation --- p.19 / Chapter 2.3.1 --- Call Setup --- p.19 / Chapter 2.3.2 --- Cell Routing --- p.21 / Chapter 2.3.3 --- Fault Tolerance --- p.27 / Chapter 2.4 --- Call Blocking Analysis --- p.28 / Chapter 2.4.1 --- Dilated Banyan --- p.29 / Chapter 2.4.2 --- Dilated Benes Network --- p.30 / Chapter 2.4.3 --- HBSI --- p.30 / Chapter 2.5 --- Results and Discussions --- p.31 / Chapter 2.6 --- Summary --- p.37 / Chapter 3 --- Multichannel Switching and Resequencing --- p.40 / Chapter 3.1 --- Introduction --- p.40 / Chapter 3.2 --- Channel Assignment --- p.41 / Chapter 3.2.1 --- VC-Based Channel Allocation Mechanism --- p.41 / Chapter 3.2.2 --- Port-Based Channel Allocation Mechanism --- p.45 / Chapter 3.2.3 --- Trunk-Based Channel Allocation Mechanism --- p.46 / Chapter 3.3 --- Resequencer --- p.50 / Chapter 3.3.1 --- Resequencing Algorithm --- p.50 / Chapter 3.4 --- Results and Discussion --- p.55 / Chapter 3.5 --- Summary --- p.60 / Chapter 4 --- Scheduling --- p.62 / Chapter 4.1 --- Introduction --- p.62 / Chapter 4.2 --- Virtual Clock Scheduling (VCS) --- p.62 / Chapter 4.3 --- Gated Virtual Clock Scheduling (GVCS) --- p.70 / Chapter 4.4 --- Time-Priority Model --- p.75 / Chapter 4.5 --- Programmable Rate-based Scheduler (PRS) --- p.80 / Chapter 4.6 --- Integration with Resequencer --- p.83 / Chapter 4.7 --- Results and Discussions --- p.86 / Chapter 4.8 --- Summary --- p.96 / Chapter 5 --- Conclusion --- p.99 / Bibliography --- p.101

by Ngai Li. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1997. / Includes bibliographical references (leaves 66-69). / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Video Compression and Transport --- p.2 / Chapter 1.2 --- Research Contributions --- p.6 / Chapter 1.2.1 --- Joint Rate Control of VBR Encoded Video --- p.6 / Chapter 1.2.2 --- Transporting VBR Video on LB Controlled Channel --- p.7 / Chapter 1.3 --- Organization of Thesis --- p.7 / Chapter 2 --- Preliminary --- p.9 / Chapter 2.1 --- Statistical Characteristics of MPEG-1 Encoded Video --- p.9 / Chapter 2.2 --- Temporal and Spatial Smoothing --- p.14 / Chapter 2.2.1 --- Temporal Smoothing --- p.14 / Chapter 2.2.2 --- Spatial Smoothing --- p.15 / Chapter 2.3 --- A Single Source Control-Theoretic Framework for VBR-to-CBR Video Adaptation --- p.16 / Chapter 3 --- Joint Rate Control of VBR Encoded Video --- p.19 / Chapter 3.1 --- Analytical Models --- p.21 / Chapter 3.2 --- Analysis --- p.27 / Chapter 3.2.1 --- Stable Region --- p.29 / Chapter 3.2.2 --- Final Value of the State Variables --- p.33 / Chapter 3.2.3 --- Peak Values of Buffer-occupancy Deviation and Image- quality Fluctuation --- p.35 / Chapter 3.2.4 --- SAE of Buffer-occupancy Deviation and Image-quality Fluc- tuation --- p.42 / Chapter 3.3 --- Experimental Results --- p.43 / Chapter 3.4 --- Concluding Remarks --- p.48 / Chapter 4 --- Transporting VBR Video on LB Controlled Channel --- p.50 / Chapter 4.1 --- Leaky Bucket Access Control --- p.51 / Chapter 4.2 --- Greedy Token-usage Strategy --- p.53 / Chapter 4.3 --- Non-greedy Token-usage Strategy --- p.57 / Chapter 4.4 --- Concluding Remarks --- p.60 / Chapter 5 --- Conclusions --- p.62 / Chapter 5.1 --- Joint Rate Control of Multiple VBR Videos --- p.62 / Chapter 5.2 --- LB Video Compression --- p.63 / Chapter 5.3 --- Further Study --- p.64 / Chapter 5.4 --- Publications --- p.65 / Bibliography --- p.65

The computer to pupil ratio has changed drastically in the past decades, from 125:1 in 1983 to less than 2:1 in 2009 (Gray, Thomas, and Lewis, 2010), allowing for teachers and students to integrate technology throughout the educational experience. The area of educational assessment has adapted to the increased use of technology. Trends in assessment and technology include a movement from paper-based to computer-based testing for all types of assessments, from large-scale assessments to teacher-created classroom tests. Computer-based testing comes with many benefits when compared to paper-based testing, but it is necessary to determine if results are comparable, especially in situations where computer-based and paper-based tests can be used interchangeably. The main purpose of this study was to expand upon the base of research comparing paper-based and computer-based testing, specifically with elementary students and mathematical fluency. The study was designed to answer the following research questions: (1) Are there differences in fluency-based performance on math computation problems presented on paper versus on the computer? (2) Are there differential mode effects on computer-based tests based on sex, grade level, or ability level? A mixed-factorial design with both within- and between-subject variables was used to investigate the differences between performance on paper-based and computer-based tests of mathematical fluency. Participants completed both paper- and computer-based tests, as well as the Group Math Assessment and Diagnostic Evaluation as a measure of general math ability. Overall findings indicate that performance on paper- and computer-based tests of mathematical fluency are not comparable and student grade-level may be a contributing factor in that difference.

Currently there are millions of Android cell phone users. Whenever a user changes location, he/she should manually modify the sound mode (ring, vibrate, silent). So, it’s slightly inconvenient to constantly monitor whether the phone is in general or silent mode. Sometimes user might forget to switch the mobile mode and may create a disturbance in the classroom or in the work area. To overcome this problem “Sound Mode Application” is an Android application that allows a user to automatically change the sound mode depending on his/her GPS location. Additionally, the user may activate or deactivate the application whenever need be, and user can add as many locations as required based on their daily life.

Hilbert-Huang Transform (HHT) is a data analysis tool, first developed in 1998, which can be used to extract the periodic components embedded within oscillatory data. This thesis is dedicated to the understanding, application, and development of this tool. First, the background theory of HHT will be described and compared with other spectral analysis tools. Then, a number of applications will be presented, which demonstrate the capability for HHT to dissect and analyze the periodic components of different oscillatory data. Finally, a new algorithm is presented which expands HHT ability to analyze discontinuous data. The sum result is the creation of a number of useful tools developed from the application of HHT, as well as an improvement of the HHT tool itself.

Dynamic monitoring of structures is a method of detecting changes and damage to the structure. Vibration based monitoring has been used to detect damage in rotating machinery and is gaining popularity in the field of Structural Health Monitoring (SHM). Monitoring involves detecting changes in natural frequencies and changes in mode shapes. These changes reflect changes to properties of the bridge which can indicate damage. The Nibley Bridge is a single span bridge comprised of ten deck bulb girders. The bridge spans 25.91m (85 ft.) and includes two lanes, sidewalks on both sides, and a small median. The Nibley Bridge was constructed with monitoring in mind. A dynamic monitoring system was planned to detect frequencies for long term monitoring. Initial monitoring of the embedded accelerometers was ineffective, so additional testing was required. An impact test was done with additional sensors to calibrate the embedded sensors. To further define the natural frequencies and mode shapes of the bridge, two shaker tests were also performed. The embedded sensors were noted as having a large noise range. Also, they required a specific data logger to detect meaningful data. Recommendations for the use of the embedded accelerometers were determined and defined. The additional tests were able to assist in calibrating the accelerometers, as well as defining the natural frequencies and mode shapes of the structure. Natural frequencies were defined for each test and the changing condition of the bridge between those tests. The addition of asphalt occurred between two tests and a change of approximately 20° C between the other two tests. Though there is not much information to form a correlation, the detected changes define the dynamic aspects of the bridge. Lastly, mode shapes were determined and a Modal Assurance Criterion (MAC)analysis was done to correlate the measured and analytical mode shapes. This model helped to indicate which parameters effect the mode shapes of the structure. Comparison between these parameters and changes between them help to indicate the predicted behavior of the structure under different circumstances. Though these tests do not define all of the dynamic properties of the bridge, they do provide a general baseline of values that can be expected for future tests of the structure.

Low-swing on-chip interconnect circuits have been viewed as alternative solutions to the problem of delay and power increase of on-chip interconnects. This thesis aims to characterize and optimize several basic low-swing interconnect circuits, by developing simple delay and power estimation methodologies. Accuracies of the proposed methods are validated against SPICE-based simulations on the 90nm technology node. Based on the delay and power estimation methods developed, optimum power-delay trade-off curves are obtained and directly used for comparison among different interconnect circuit strategies. Three low-swing techniques are included, i.e. conventional level converter (CLC), pseudodifferential interconnect circuit (PDIFF), and current-mode signaling (CM). These techniques represent significantly different driver and receiver topologies, where CLC uses lower supply voltage of a normal inverter driver, PDIFF uses NMOS only drivers, while CM has a low impedance termination at the receiving end. In addition, an optimized full-swing repeater-based technique is included as a baseline for comparison. A simplified repeater performance estimation technique considering ramp input signals is also proposed. The most important step in estimating delay of different driver circuits is the accurate estimation of transistor effective resistance, which considers velocity saturation effects and voltage transition patterns. Optimization for the CM circuit for on-chip interconnects requires completely different treatment than the voltage-mode circuits, due to the different and more complex effective driver resistance and termination resistance modeling. Sizing the driver and receiver transistors should be done simultaneously as their resistive values which affect its performance are dependent on each other. Optimum transistor sizing is very dependenton the required voltage swing chosen. Results of our comparisons show that optimized CLC (reduced voltage supply) repeaters appears to give the best general performance with a slight delay overhead compared to full-swing repeaters. The fact that CLC with repeaters has shorter delay than single-segment CM and PDIFF highlights the effectiveness of repeater structures in long wires. The inclusion of inductance and closed-form solutions to derive optimum transistor sizings for various low-swing interconnect circuits may be developed as a future work using delay and power estimation models presented in this thesis, which is a challenging task to do considering the non-linear equations involved.

The majority of ATM switches that have been proposed only support unicast (point-to-point) connections. Those supporting multicast (point-to-multipoint) connections tend to perform poorly, with acceptable multicast performance only achievable using an excessive amount of hardware. Because of the growing importance of multicast traffic, there is the demand for multicast switch designs which offer both low hardware complexity and high performance. This research investigates a class of multicast ATM switches called recycling switches which can satisfy both requirements. Recycling switch performance is studied using a simulated network model. The major performance parameters measured are the loss rate, mean delay, and delay variance of cells crossing through the switch under uniform and bursty traffic patterns. The reason recycling is not more widely used in multicast switches is the perception that it can lead to some multicast cells receiving lower quality of service than others. This research demonstrates a new priority-based approach to designing recycling multicast ATM switches which addresses this problem while maintaining low complexity and excellent scalability. / Masters Thesis

<p>Syftet med denna studie har varit att undersöka hur medier, så som TV, tidningar och Internet påverkar kroppsuppfattningen bland eleverna på designprogrammet. Samt att se om, och i så fall hur, lärarna arbetar med att förebygga den konstlade bild av kropp och kön som media visar upp. Som grund till detta arbete ligger en enkätstudie gjord med 54 elever på ett designprogram. Baserat på resultatet från enkätundersökningen genomfördes gruppintervjuer med lärare och elever på designprogrammets textila inriktning. Resultatet visade att trots att eleverna i väldigt liten utsträckning led av övervikt så eftersträvade de ständigt en slankare och mer vältränad kropp. Vidare framkom att visst påverkades eleverna av medias bild av hur man bör se ut, men att det fanns en ännu större influens, och det var vänner. Slutligen kunde jag konstatera att lärarna i väldigt liten utsträckning arbetade med att förebyga mediers värderingar kring hur kroppen bör se ut.</p>

No description available.