Digital Commons Network^™

Adaptive Receivers For Direct-Spread And Multi-Carrier Code Division Multiple Access Systems, Xiangqun Liu

Theses

In this thesis, the detection of Direct Sequence Code Division Multiple Access (DS-CDMA) signals in an AWGN channel and Multi-Carrier (MC) CDMA signals in a time-dispersion channel is discussed.

The DS-CDMA receiver employs an adaptive multiuser interference canceler that utilizes deadzone limiters in the tentative decision stage. With weights adjusted adaptively, the prior knowledge of signal powers is unnecessary. The steady state error performance of this receiver is obtained and found to be superior to the performance of the same receiver using hard limiters for tentative decisions. The channel is considered non-fading in. this receiver.

Modeling the frequency selective channel …

Decentralized Optimal Control In Descriptor Systems, Hag-Yeon Park

Theses

Application of Matrix Minimum Principle to a linear decentralized optimal control in descriptor systems is studied in this thesis. Linear-quadratic index of performance with Gaussian initial state is considered. The necessary and sufficient conditions for optimality are derived

An additional constraint is imposed such that the controllers are linear function of output y(t) rather than of the state vector x(t). The optimal gain matrix G_i^* is then specified by the necessary conditions.

Two examples are developed to illustrate the concept.

Correlation Between Tidal Volume Measured By Spirometry And Impedance Pneumography, Krithika Seshadri

Theses

In this study, an alternative method, impedance pneumography was used to measure the respiration volume. The respiration volume was measured both by using a conventional spirometer and an impedance pneumograph, and evaluated quantitatively in 17 subjects using linear and nonlinear regression algorithms.

Data were collected from 17 normal, healthy subjects during rest and paced breathing conditions. A technique was developed to measure tidal volume by impedance pneumography. The respiration volume measured by the spirometer was correlated with the volume measured by the pneumograph. Different electrode positions and postures were included in the study to determine the position and posture which …

Cityscapes: Solitude And Introspection, Fred G. Monti

Theses

The paintings, in this series, deal with the psychology of the urban landscape. Sky lines, night scenes, and the human figure were examined. City structures, inhabitants, and the elements which make them up, become symbolic: catalysts for contemplation. The commonplace becomes metaphysical. The city is a foreign vacuum; a spiritual nomads land. Buildings, bus shelters, steel and glass become a compositional prison. Like an enigmatic halfway house, we have entered urban limbo. This group of paintings is a commentary on such imagery. Specifically, they are visual impressions of its numbing effect on the human psyche.

Memories In Nature, Keng Nio Ong

Theses

Not Included

Digital Illustration, Punlope Chantravekin

Theses

None provided.

Form As Symbol: Allure And Defense, Alexandra Hart

Theses

In my thesis, I explore some recurrent ideas which I have become aware of in my work. The central idea of the work is to explore my fascination with the beauty that I find in organic form, specifically forms in nature which have a defensive function. Though the function of my work is not to defend, I explore the form itself in terms of its visual impact on the viewer. Another component of the work is my attempt to reconcile my respect and admiration for the jewelry that has been done in the past with the contemporary emphasis on creating …

Invisible Force, Sharon Lockwood

Theses

None provided.

Fuzzy Approach For Arabic Character Recognition, Adnan El-Nasan

Theses

Pattern recognition/classification is increasingly drawing the attention of scientific research because of its important roll in automation and human-machine communication. Even though many models have been introduced to deal with classification, because of the inherited imprecision and ambiguity, these models did not tackle the problem in an efficient way. Traditional models deal only with statistical uncertainty (randomness) but not with the non-statistical uncertainty (vagueness). Fuzzy set theory allows us to better understand imprecision in both of its categories: vagueness and randomness. The incorporation of fuzzy set theory in existing algorithms helped in many cases to improve the performance and increase …

Facts And Treatment Options For Patients With Endometriosis, Adrienne Reaves

Theses

None provided.

Herbert Feuerhake: Hand-Letterer, Nicholas Dibiase

Theses

The life of Herbert Feuerhake as a designer and hand-letterer was researched and recorded. A summary of hand-lettering in the twentieth-century was provided to help connect the style and methodology of Feuerhake to his time. A brief biography was assembled, and an illustrated catalog of designs was compiled in two parts. The first part being a collection of Feuerhake alphabet designs. The second part is a catalog of graphic designs, ads, and logos. In addition to research inspired by the Feuerhake Archive, the archive itself was organized, labeled, and placed in protective folders as part of this thesis. Research on …

Wee Deliver Interactive, Kimberly Demetree

Theses

None provided.

The Making Of "The Letter", Richard Simms

Theses

None provided.

Talk To Me, Frances Drew

Theses

None provided.

A Vhdl Design Of A Jpeg Still Image Compression Standard Decoder, Douglas Carpenter

Theses

Digital images require large amounts of memory to be stored in a computer system. The JPEG compression standard allows the amount of memory storage required by a digital image to be reduced with little to no perceptible loss of image quality. This thesis is a design of an ASIC that implements a decoder of JPEG compressed images. The decoder implements the baseline decoder defined by the JPEG standard with a few exceptions, the most notable being that only grayscale images can be decompressed. With such an ASIC, the speed of decompressing images is greatly increased. The decoder was designed by …

Design And Characterization Of An Amperometric Glucose Detector For Flow Injection Analysis, Jean Wallace

Theses

An amperometric glucose detector, based on platinized membrane electrodes, for use in flow injection analysis has been designed and characterized. The platinized electrodes prepared for the sensor were constructed from a perfluorinated polymer matrix, Nafion 117, through an impregnation-reduction technique. This technique encompasses the incorporation of platinum (II) ions into the polymer, which are subsequently reduced to platinum (0). Once constructed, the platinized impregnated membrane (PIM) electrodes were characterized electrochemically, under both aqueous and non-aqueous conditions. The PIM electrodes were shown to preconcentrate ions of varying size and charge, as well as retain the complex ionic molecules necessary for mediation …

Blind Equalization, Daniel Diguele

Theses

An equalizer is an adaptive filter that compensates for the non-ideal characteristics of a communication channel by processing the received signal. The adaptive algorithm searches for the inverse impulse response of the channel, and it requires knowledge of a training sequence, in order to generate an error signal necessary for the adaptive process. There are practical situations where it would be highly desirable to achieve complete adaptation without the use of a training sequence, hence the the term "blind". Examples of these situations are multipoint data networks, high-capacity line-of-sight digital radio, and reflection seismology. A blind adaptive algorithm has been …

Image Transformation Into Device Dependent Color Printer Description Using 4th-Order Polynomial Regression And Labview Object Oriented Programming Development Of Image Processing Modules, Michael Mongeon

Theses

This thesis investigates the development of printer device profiles used in color document printing system environments when devices with intrinsically different gamut capabilities communicate with one another in a common (CIELAB) color space. While the main thrust of this activity focuses on the output printer, namely the Xerox 5760 printer, and its rendition of some device independent image description, characterizations are provided which investigate relative areas of photographic, monitor, and printer gamuts using a visual hue leaf comparison between devices at standard hue angles determined from a Kodak photographic Q60C. The printer is modeled using 4th-order polynomial regression which maps …

Comparing The Ability Of Subjective Quality Factor And Information Theory To Predict Image Quality, Shyi-Shyang Li

Theses

The purpose of this project is to compare the ability of the Subjective Quality Factor and Information Theory to predict image quality as a function of film speed for two different methods of exposing film. One exposure holds the total number of photons constant and the other allows the flux to vary. This study will: 1 . Determine the relationship between grain size and image quality for constant flux when the resulting images are reproduced at the same size. 2. Compare the resulting granularity and image quality of the constant flux condition with the normal exposure method of varying the …

Sentinel: Monumental Sculpture, Charles Jerome Washburn

Theses

None provided.

Plugged-In: 40 Years Of Digital Imaging, Carol Christy Brown

Theses

To create an interactive piece that will provide to the user a feel for the rapid development of digital imaging, the key players involved and its impact on the way we create visual media today. This interactive presentation will seek to establish how this new medium emerged from the collaboration of many creative minds in the scientific and art worlds.

A Flexible Development System For Stepper Motor Based Electro-Mechanical Subassembly Design, Joseph Baco

Theses

In cooperation with Rochester Institute of Technology and Eastman Kodak Company's Clinical Diagnostics Division, this thesis project describes the design of a PC-based development tool which will aid in the design and testing of electromechanical sub assemblies incorporating stepper motors. This tool will integrate the ability to perform digital I/O along with open loop stepper motor control methodologies bundled under a Windows based software package to produce a user interface aimed towards the mechanical and electrical engineering development communities. In its maximum configuration, the system consists of 8 single processor control nodes, each of which is capable of executing a …

Surface Modification Of Fluoropolymers For The Improvement Of Adhesion: O2-Cf4-Ar Radio Frequency Plasma Modification Of Poly (Tetrafluoroethylene), Kan Lu

Theses

None provided.

A Study On The Atmospheric Quality And Control In The Emirate Of Abu Dhabi, Sukaina Faisal Al-Wasity

Theses

Limited data are available on air pollution levels in Abu Dhabi Emirate in general. Therefore, the present study was designed to investigate the level of atmospheric contaminants in the environment of Abu Dhabi Emirate. This includes measurement of suspended particulate matter less than 10 micron (SPM₁₀) in Al Ain City during normal and stormy conditions and measurement of the same air solids besides the gaseous pollutants: ozone, sulphur dioxide, carbon monoxide, nitrogen oxides and methane and non-methane hydrocarbons in Abu Dhabi City and follow up of hourly variation in their concentration. The study further includes collecting sufficient data …

Simulation Analysis Of Fddi Network Using Network Ii.5 Software Package, Anastassis A. Lazarides

Theses

In recent years, one of the most exciting advances in media has been the use of fiber optics in LANs. The bandwidth provided by Fiber Optic Technology has drastically increased the number of new applications that can be supported by communication networks. In order to support a variety of services, in 1986, the American National Standard Institute (ANSI) Accredited Standards Committee (ASC) X3, and the ASC X3T9.5 Task Group developed a new standard; the Fiber Distributed Data Interface (FDDI) [1]. This is a high speed (100 Mbps) optical communication network based on a token passing mode of operation. The Medium …

Motion Compensation Using Correlation-Feedback, Zebiba Shifa

Theses

Motion compensation is widely used for exploiting temporal redundancies in the coding of image sequences. Accurate estimation of motion information in image sequences is important in motion-compensated coding. Different approaches have been used to estimate motion to obtain the motion-compensated frame difference signal.

This work uses the correlation-feedback approach to estimate the velocity or the optic flow of the moving image pixel. After the motion of the pixel is estimated. the motion-compensated frame difference signal is found by subtracting the current. frame from the predicted frame.

This correlation-feedback approach estimates the true motion vector of moving image accurately. Consequently, the …

Prevention Of Occupational Exposure Of Tuberculosis To Health Care Workers, Thomas C. Carle

Theses

The resurgence of tuberculosis in the United States within the past decade has prompted the health care community to develop tuberculosis elimination policies. However, recent outbreaks of tuberculosis have proved to be resistant to multiple antibiotics. Tuberculosis infections among health care workers is also rising. This increase in occupational exposures has prompted the examination of current exposure control measures.

The occupational exposure to tuberculosis is prevented by the use of administrative policies, engineering controls and personal protective equipment. Each control measure has inherent strengths and weaknesses and when implemented through an exposure control plan the risk of occupational exposure can …

3-D Reconstruction And Morphological Analysis Of Normal Rectum, Saritha Sundaresan

Theses

There is no documentation of the 3-D dimensions of normal rectum. We present a method for the architectural and volumetric analysis of the rectum which makes use of a computerized 3-D reconstruction and CT scans of cross-sections of the rectum. The technique is simple, fast, yet potentially reliable. An attempt has been made to calculate the volume, area and average diameter of non-distended rectums (normal). Once we can standardize the technique, then we can study dimensions of the rectum in adult males and females. This thesis constitutes a unified presentation of the essential aspects of the method used in this …

An Integrated Approach To Implement Iso 9000 Series Standards To United States Manufacturing Industry, Jatin N. Amin

Theses

Implementation of ISO 9000 series quality system standards to the U.S. manufacturing industry is discussed by developing a generic model for implementation. In recent past, quality became a prime performance issue to formulate strategy to improve market share and profit for U.S. manufacturing industry. Many companies seeks for ISO 9000 registration. Manufacturing industry and other industries as well, are facing numerous problems in implementing ISO 9000 quality system standards. At present, about 400 U.S. companies have gained certification under this standard.

In this work an attempt has been made, to highlight problems which are most likely to be critical to …

Modeling, Simulation And Hemodynamic Response Analysis Of Arteriovenous Malformation Occlusion, Huijuan Mao

Theses

The cerebral Arteriovenous Malformation system (AVM) or fistula, is a network with large caliber vessels that yields an alternate pathway for blood flow between arteries and veins. Neurosurgical and interventional radiological techniques are the common way to treat AVM patients so that the normal capillary blood flow would be restored. Several patients who underwent this procedure had different degrees of brain swelling and subsequent hemorrhage. To understand this, Blesser et al. developed a simplified model to simulate the effect of AVM occlusion on cerebrovascular pressure and flow. Their model does not include the cerebrovascular regulatory mechanism which is an important …