Digital Commons Network^™

Design Of Alu And Cache Memory For An 8 Bit Alu, Pravin Chander Chandran

All Theses

The design of an ALU and a Cache memory for use in a high performance processor was examined in this thesis. Advanced architectures employing increased parallelism were analyzed to minimize the number of execution cycles needed for 8 bit integer arithmetic operations. In addition to the arithmetic unit, an optimized SRAM memory cell was designed to be used as cache memory and as fast Look Up Table.
The ALU consists of stand alone units for bit parallel computation of basic integer arithmetic operations. Addition and subtraction were performed using Kogge Stone parallel prefix hardware operating at 330MHz. A high performance …

Parental Education Levels And Their Effect On First Year Retention And Grade Point Ratio, Jon Christiansen

All Theses

Background/Problem: Education is an important factor in economic success. This research explores how relevant parental education is to their children's education by studying first year college retention as well as first year cumulative grade point ratio. Purpose: By what probability is retention increased on average if a mother or father becomes a high school graduate or a college graduate? Also, by what amount is grade point ratio affected if a mother or father becomes a high school graduate or a college graduate? Design and Methods: A random sample of 844 students who filled out the FAFSA at a southern public …

Passive Fathometer Processing, Peter Gerstoft, William S. Hodgkiss, Martin Siderius, Chen-Fen Huang, Chris H. Harrison

Electrical and Computer Engineering Faculty Publications and Presentations

Ocean acoustic noise can be processed efficiently to extract Green's function information between two receivers. By using noise array-processing techniques, it has been demonstrated that a passive array can be used as a fathometer [Siderius, et al., J. Acoust. Soc. Am. 120, 1315-1323 (2006)]. Here, this approach is derived in both frequency and time domains and the output corresponds to the reflection sequence. From this reflection sequence, it is possible to extract seabed layering. In the ocean waveguide, most of the energy is horizontally propagating, whereas the bottom information is contained in the vertically propagating noise. Extracting the seabed information …

Different Learned Coordinate Frames For Planning Trajectories And Final Positions In Reaching, Claude Ghez, Robert A. Scheidt, Hank Heijink

Biomedical Engineering Faculty Research and Publications

We previously reported that the kinematics of reaching movements reflect the superimposition of two separate control mechanisms specifying the hand's spatial trajectory and its final equilibrium position. We now asked whether the brain maintains separate representations of the spatial goals for planning hand trajectory and final position. One group of subjects learned a 30° visuomotor rotation about the hand's starting point while performing a movement reversal task (“slicing”) in which they reversed direction at one target and terminated movement at another. This task required accuracy in acquiring a target mid-movement. A second group adapted while moving to—and stabilizing at—a single …

Prolonged Quadriceps Activity Following Imposed Hip Extension: A Neurophysiological Mechanism For Stiff-Knee Gait?, Michael D. Lewek, T. George Hornby, Yasin Y. Dhaher, Brian D. Schmit

Biomedical Engineering Faculty Research and Publications

The biomechanical characteristics of stiff knee gait following neurological injury include decreased knee flexion velocity at toe-off, which may be due to exaggerated quadriceps activity. The neuromuscular mechanism underlying this abnormal activity is unclear, although hyperexcitable heteronymous reflexes may be a source of impaired coordination. The present study examines the contribution of reflex activity from hip flexors on knee extensors following stroke and its association with reduced swing-phase knee flexion during walking. Twelve individuals poststroke and six control subjects were positioned in supine on a Biodex dynamometer with the ankle and knee held in a static position. Isolated hip extension …

The Impacts Of Congestion On Commercial Vehicle Tours Characteristics And Costs, Miguel A. Figliozzi

Civil and Environmental Engineering Faculty Publications and Presentations

Congestion is a common phenomenon in all major cities of the world. Increased travel time and uncertainty brought about by congestion impacts the efficiency of logistics operations. Recent studies indicate that a significant proportion of commercial vehicle kilometers traveled (VKT) and vehicle hours traveled (VHT) are generated by trip-chains or multi-stop tours. This paper presents research demonstrating the impact of congestion on multi-stop tours in urban areas. An analytical model, numerical experiments, and real-world tour data are used to understand the impact of congestion on tour characteristics, carriers? costs, VKT, and VHT. This research shows that travel time/distance between customer …

Analysis Of Freight Tours In A Congested Urban Area Using Disaggregated Data: Characteristics And Data Collection Challenges, Miguel Andres Figliozzi, Lynsey Kingdon, Andrea Wilkitzki

Civil and Environmental Engineering Faculty Publications and Presentations

Confidentiality issues are usually an insurmountable barrier that precludes the collection of detailed and complete freight data. However, when detailed disaggregated truck activity data is available, the analysis of commercial vehicle routes and trip chain structures can provide insightful information about urban commercial vehicle tours, travel patterns, and congestion levels. Where truck data is usually aggregated and cross-sectional, this research analyzes several months of detailed truck activity records in a congested urban area and thus contributes a level of investigation unavailable with aggregated data. To the best of the author's knowledge, there is no published research regarding the analysis of …

The Summer Season, Richard L. Knight, W. Robert Peeples, Phillip D. Casteel, Richard P. Lewis

The Migrant - Tennessee Ornithological Society

No abstract provided.

Retaining Exploring Students: A Comparison Study Of Decided And Undecided College Students, Betty D. Dennis

Dissertations

U.S. four-year institutions graduate fewer than 50% of its first-time, full-time, degree-seeking students within six years Today, improving college student retention and graduation rates is a primary focus of higher education nationwide. Scholars have found that students who enter college undecided and are still exploring majors need a great deal of support to be retained. Research has also demonstrated that between 20% and 50% of entering freshmen have not selected a major course of study and that colleges and universities are concerned these students are at a higher risk of leaving the institution. What is unclear is whether selecting a …

Resistivity And Hall Measurement In Semiconductor Heterostructures, Mohammed Salem

McNair Scholars Research Journal

No abstract provided.

Full Issue, The Mcnair Team

McNair Scholars Research Journal

No abstract provided.

Legacy - December 2007, South Carolina Institute Of Archaeology And Anthropology--University Of South Carolina

SCIAA Magazine - Legacy & PastWatch

Contents:

Draught Triggers Archaeology at Dry Lake Beds.....p. 1
Director’s Note.....p. 2
SCIAA Offers Postdoctoral Position.....p. 3
Conference on Southeastern Colonial Frontiers.....p. 3
Collaboration with USC’s Department of Geology.....p. 6
SCIAA’s Maritime Research Division Web Site Available.....p. 9
German Stonewares from Colonial Sites.....p. 10
New Book: Ceramics in America.....p. 13
New Thoughts on Old Pottery.....p. 14
Late Holocene Taquara/Itareare Culture in Argentina.....p. 16
R. L. Stephenson Fund.....p. 17
SCIAA/ART Donors 2006-2007.....p. 18
34th Annual Conference on South Carolina Archaeology.....p. 20

Drought Triggers Archaeology At Santee Cooper's Dry Lake Beds, Jonathan Leader

Faculty & Staff Publications

No abstract provided.

Cross-Layer Design For Wireless Ad Hoc Sensor Networks, Xinsheng Xia

Electrical Engineering Dissertations - Archive

Cross-layer design is an efficient approach to enhance energy efficiency and Quality of Service (QoS) in wireless ad hoc sensor networks. This dissertation will focus on the cross-layer issues and approaches. It will also discuss the latency-aware and energy efficiency tadeoffs and the packets transmission in the rear part of the dissertation. Firstly, we will analyze the cross-layer design for wireless sensor networks based on the virtual MIMO techniques. We will coordinate the physical layer, the MAC layer and the network layer for cross-layer evaluation. Performance analysis and simulation results show that throughput and packet loss ratio will have different …

Measurement And Modeling Of 1/F Noise In Mosfet Devices With High-Κ Material As The Gate Dielectric, Tanvir Hasan Morshed

Electrical Engineering Dissertations - Archive

A new 1/f noise model has been developed for MOSFET devices with high-? gate stack. To investigate the impacts of nitridation, MOSFETs with nitrided high-? dielectric was used. These devices were provided by Texas Instruments, having four different interfacial layer thicknesses with a stack composition of SiON/HfSiON. The dominant mechanism affecting the noise behavior of these devices was experimentally determined to be correlated number and mobility fluctuation. The impact of remote phonon scattering was investigated in the temperature range of 172K to 300K. It has been observed that the mobility characteristics of these devices were significantly affected by remote phonon …

Acknowledgements, The Mcnair Team

McNair Scholars Research Journal

No abstract provided.

Friends Of The Uta Library Mcnair Scholarship Awards, The Mcnair Team

McNair Scholars Research Journal

No abstract provided.

Evaluation Of The Role Of Driver’S Knowledge Of Who Has The Right-Of-Way Contributes To Interstate On-Ramp Crashes, Deogratias Eustace, Vamsi Krishna Indupuru

Civil and Environmental Engineering and Engineering Mechanics Faculty Publications

The knowledge of drivers on who has the right-of-way between the one on mainline lanes of a freeway and the one entering the freeway through on-ramp junction lane was evaluated. In addition, drivers’ opinions on how to make the on-ramp junctions safer were collected. A survey instrument with 21 items requesting drivers’ information in regard with demographics, freeway driving experience, knowledge of right-of-way and merging practices was used for data collection. The results show that crashes are relatively rare events and for some reasons, most of them never happen but result into near misses, which can not be reported and …

研究生助教教學提升方案成效的初步分析, 克忠 林, 榮森 劉, 佩倫 蔡, 菁宜 吳

Journal of Medical Education

研究所學生修業與學術訓練過程裡，常需擔任大學部助教，藉以累積教學經驗，但未曾修習教育相關課程的研究生，在課前通常缺乏教學訓練。有鑑於大學教學卓越的趨勢廣受重視，各大學開始注意研究生助教的培訓，但相關訓練方案的成效報告仍欠缺。本研究針對研究生助教的教學品質，對比事前教學訓練與教學回饋兩種訓練方案，藉以探討兩種訓練方案在教學成效上的差異，以及研究生助教的自評結果。本研究以九十五學年度臺灣大學醫學院職能治療學系碩士班及長庚大學臨床行為科學研究所職能治療組的二十六名研究生助教作為研究樣本，將受試隨機分配至獨立的兩組（各十三人），分別施以「事前訓練」（教學理念與教學方法等團體介紹）與「影片回饋」（依據教學錄影，提供個別回饋與諮商）。研究結果顯示「影片回饋組」在教學意見調查的「表達能力」與「教學效果」兩項，得分顯著優於「事前訓練組」。兩組受試自評結果則無顯著差異。本研究結果支持教學過程的實務回饋，對研究生助教教學能力提升的成效。未來研究值得以更大樣本，進行研究生助教訓練對教學與生涯發展的長期成效。

職能治療師專業認同之現況調查, 璦琬 潘, 詞章 陳, 麗英 鍾, 致瑩 李, 瑋玲 許

Journal of Medical Education

增進專業認同一直是各專業用以提升服務品質的策略之一，本研究之目的是探討職能治療師對職能治療專業的認同情形、影響認同感之因素以及提升專業認同感之建議。本研究以郵寄問卷的方式進行，研究者由2004年台灣職能治療學會通訊錄中，進行隨機抽樣，共抽出200位樣本以寄發問卷。回收67份，回收率33.5%。填答者平均年齡為33.6歲(SD=6.5)；共有49 位女性，佔73.1%。回收問卷中，填答者的工作機構中，醫學中心佔多數，共43.3%。服務年資以5~10年佔多數，共37.3%。工作領域別中，38.8%從事「心理疾病職能治療」，佔最多數。居住者以北部為最多，佔35.8%。教育程度方面，59.7%具有大學之學歷。影響職能治療師的專業認同之因素依序為：「實習時的老師」、「大學實習」、、「家屬病患對職能治療師的肯定」、「醫療團隊中的重要性」、「醫療團隊中的自主性」。其中，「大學實習」與「實習時的老師」兩因素與先前研究影響大學生專業認同感之因素相同。職能治療師提及用以提升認同感之建議，包括：改善工作環境、加強職能治療之行銷及增加在職進修等。本文是首篇調查台灣的職能治療師之專業認同感情形。研究結果顯示，越喜歡職能治療及工作環境、年資越高、年齡越大、越喜歡與人接觸且月收入越高的臨床治療師，其專業認同感越高。此外，年資越高、月收入越高、年齡越大者越瞭解職能治療；年齡越大、越喜歡與人接觸者越喜歡職能治療專業。顯現了個人特質對專業認同感之重要影響。迴歸分析之結果顯示，「喜不喜歡職能治療」是預測認同感程度的最顯著因子。因此，可藉由提升對職能治療的喜歡度，來強化工作者之專業認同程度。

What Is Rcu, Fundamentally?, Paul E. Mckenney, Jonathan Walpole

Computer Science Faculty Publications and Presentations

Read-copy update (RCU) is a synchronization mechanism that was added to the Linux kernel in October of 2002. RCU achieves scalability improvements by allowing reads to occur concurrently with updates. In contrast with conventional locking primitives that ensure mutual exclusion among concurrent threads regardless of whether they be readers or updaters, or with reader-writer locks that allow concurrent reads but not in the presence of updates, RCU supports concurrency between a single updater and multiple readers. RCU ensures that reads are coherent by maintaining multiple versions of objects and ensuring that they are not freed up until all pre-existing read-side …

Entrepreneurial Stock Brokering And Switching Costs, G. Geoffrey Booth, Orkunt M. Dalgic, Juha-Pekka Kallunki, Petri Sahlström

The Journal of Entrepreneurial Finance

Stock brokers are entrepreneurs who incur switching costs when the change brokerage houses. We use Helsinki Stock Exchange data to investigate these costs by examining whether investors are loyal to their brokers when brokers move. We find that investors who have extant relationships with the new house are more likely to attract the investors from the old houses, and savvy (knowledgeable) investors are more likely to stay with their broker.

Collaborative Routing Algorithm For Wireless Sensor Network Longevity, Shishir Bashyal, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

This study proposes a new parameter for evaluating longevity of wireless sensor networks after showing that the existing parameters do not properly evaluate the performance of algorithms in increasing longevity. This study also proposes an ant inspired Collaborative Routing Algorithm for Wireless Sensor Network Longevity (CRAWL) that has scalability and adaptability features required in most wireless sensor networks. Using the proposed longevity metrics and implementing the algorithm in simulations, it is shown that CRAWL is much more adaptive to non-uniform distribution of available energy in sensor networks. The performance of CRAWL is compared to that of a non-collaborative algorithm. Both …

The High-Tech Sector In Northeast Ohio: 2007 Update, Ziona Austrian, Jill S. Taylor

All Maxine Goodman Levin School of Urban Affairs Publications

This report describes trends in the high-tech sector in Northeast Ohio, focusing on the 2004-2006 time period. It is the first update to a baseline report released in February 2007 that analyzed trends between 2000 and 2005. This study follows the baseline report in that it examines the high-tech sector in Northeast Ohio from three perspectives — high-tech industries, high-tech occupations, and research and development activity. It assesses the strengths and weaknesses of high-tech industries in terms of employment, average wage, gross regional product (output), and productivity. High-tech occupations are analyzed in terms of employment levels. Research and development activity …

An Estimation Of Distribution Improved Particle Swarm Optimization Algorithm, Raghavendra V. Kulkarni, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

PSO is a powerful evolutionary algorithm used for finding global solution to a multidimensional problem. Particles in PSO tend to re-explore already visited bad solution regions of search space because they do not learn as a whole. This is avoided by restricting particles into promising regions through probabilistic modeling of the archive of best solutions. This paper presents hybrids of estimation of distribution algorithm and two PSO variants. These algorithms are tested on benchmark functions having high dimensionalities. Results indicate that the methods strengthen the global optimization abilities of PSO and therefore, serve as attractive choices to determine solutions to …

A Systematic Semi-Numerical Approach For Modeling Of Signal And Power Integrity Of Electronic Packages, Er Ping Li, En Xiao Liu, Zaw Zaw Oo, Xingchang Wei, Yaojiang Zhang, R. Vahldieck

Electrical and Computer Engineering Faculty Research & Creative Works

A novel method for system-level modeling of advanced electronic packages is presented which is able to provide fast yet accurate simulation for signal and power integrity analysis of the multilayered electronic packages. the method is a semi-numerical approach based on the combination of the moment method and the scattering matrix method. © 2007 IEEE.

Detecting Malicious Logic Through Structural Checking, Scott C. Smith, Jia Di

Electrical and Computer Engineering Faculty Research & Creative Works

Hardware is just as susceptible as software to "hacker attacks", through inclusion of malicious logic; and the consequences of such an attack could be disastrous! the impact of software viruses has been felt, at one time or another, by the entire computerized world, through loss of productivity, loss of system resources or data, or mere inconvenience. However, the nature of malicious logic and defending against it is fundamentally different from its software counterpart. Malicious logic has the added dimension of not being removable once encapsulated in the system. This paper will identify hardware vulnerabilities and will outline an automated method, …

Nanofabric Pla Architecture With Redundancy Enhancement, Mandar V. Joshi, Waleed K. Al-Assadi

Electrical and Computer Engineering Faculty Research & Creative Works

Fundamental electronic structures such as Diodes and FETs have been shown to be constructed using selectively doped semiconducting Carbon Nanotubes or Silicon Nanowires (CNTs, SiNWs) at nanometer scale. Memory and Logic cores have been proposed, that use the configurable junctions in 2-D crossbars of CNTs. These Memory and Logic arrays at this scale exhibit a significant amount of defects that account for poor a yield. Configuration of these devices in the presence of defects demands an overhead in terms of area and programming time. This work introduces a PLA configuration that makes use of fixed and adaptive redundancy in terms …

Neural-Network-Based Intelligent Control For Improving Dynamic Performance Of Facts Devices, Wei Qiao, Ronald G. Harley, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

Flexible ac transmission system (FACTS) devices are widely recognized as powerful controllers to improve the dynamic performance and stability of power systems. the standard FACTS controllers are linear controllers designed around a specific operating point from a linearized system model with fixed parameters. However, at other operating points their performance degrades. Neural-network-Based nonlinear intelligent control offers an attractive approach to overcome the drawbacks of the linear controllers. This paper presents two different neural-network-Based intelligent control architectures, i.e., indirect adaptive NeuroControl and adaptive critic design based optimal NeuroControl, for designing the external control of an SSSC FACTS device. Simulation studies are …

Self-Healing Control With Multifunctional Gate Drive Circuits For Power Converters, Xiao Peng, Ganesh K. Venayagamoorthy, Keith A. Corzine, Robert Woodley

Electrical and Computer Engineering Faculty Research & Creative Works

Many commercial and military transport systems have fault diagnostic functions implemented to help protect the device when a severe fault occurs. However, most present systems do not contain prognostics capability which would allow operators to observe an unhealthy system component in its prefault condition. in industry applications, scheduled downtime can result in considerable cost avoidance. the next technology step is self-healing system components which observe not only potential problems but can also take steps to continue operation under abnormal conditions - whether due to long-term normal wear-and-tear or sudden combat damage. in this paper, current and voltage information using the …