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An Evaluation Of The S2ia Switched-Current Architecture For (Delta)(Sigma) Modulator Adcs, Andre Botha
An Evaluation Of The S2ia Switched-Current Architecture For (Delta)(Sigma) Modulator Adcs, Andre Botha
Theses
Switched-Current (SI) is a design methodology by which discrete time, current mode, analog circuits can be implemented using standard digital CMOS processes, allowing the addition of analog signal processing circuits, analog to digital converters (ADCs), digital to analog converters (DACs) and other analog and mixed-signal circuits to otherwise digital only microchips without the need and expense of any extra fabrication steps. SI circuits operate by employing a secondary effect in CMOS circuits, a transistor's gate capacitance, to store charge and thus form a current memory cell. A current memory cell is one of the basic building blocks found in most …
An Investigation Into The Effect Of Plate Hardness, And Surface Speed Differential On Flexographic Gear Marking, Wisit Wirojrungson
An Investigation Into The Effect Of Plate Hardness, And Surface Speed Differential On Flexographic Gear Marking, Wisit Wirojrungson
Theses
Gear marking is a print defect in flexography. It appears as a uniformly spaced pattern of lateral alternating dark and light bands along the web length corresponding to the distance between gear teeth. A comprehensive definition characterizes gear marking as a regular pattern attributable to metal burrs, nicks, debris, or other flaws that lead to unsmooth movement somewhere in the mechanical system of the press. Gear marking can be caused by a multitude of different factors. In most cases, gear marking results from more than one phenomenon. The objective of this study was to investigate some factors that were expected …
Synthesis And Characterization Of Functionalized Zirconium Pendent Polyamic Acids And Polyimides Based On 3,4'-Oda And Odpa, Wei Wang
Theses
The objective of this thesis is to synthesize functionalized zirconium complex pendent polyamic acids and polyimides, then compare their characteristics, e.g. thermal properties, atomic oxygen resistance, and film properties (adhesion, flexibility, and solvent resistance). Towards this end, five different zirconium complexes were attached to the polyamic acid, which is based on 3,4'-oxydianiline (3,4'-0DA), 4,4'-oxydiphthalic anhydride (ODPA), and mellitic dianhydride (MADA), in the presence of dicyclohexylcarbodiimide (DCC). The resulting zirconium complex pendent polyamic acids and the parent polyamic acid were cast onto glass substrates, then thermally imidized by heating at 100C, 200C, and 300C for one hour each. The synthesized zirconium …
An Investigation Into The Relationship Between Contrast And Resolution Of A Printing System Using The Rit Contrast Resolution Test Target, Eliot Harper
Theses
A problem arises when different printing systems are used to print images. Different systems have considerably different contrast and resolution capabilities while an individual printing system might have a low resolution capability, the system may have the ability to render low contrast detail. Similarly, if a printing system has a high resolution capability, it does not necessarily mean that such a system has the ability to render low contrast detail well. Such contrast and resolution restrictions may be attributed to the capabilities of the PostScript interpreter, the screening method used by the RIP, the image transfer method of the output …
A Descriptive Study Of School-Based Intervention Teams In New York State, Sean Croft
A Descriptive Study Of School-Based Intervention Teams In New York State, Sean Croft
Theses
This study examined the current practices of school-based intervention teams (SBIT) in New York State. SBIT are designed to provide immediate assistance to students and teachers, to enhance the ability of teachers to serve difficult-to-teach students within regular education classrooms, and to reduce the number of inappropriate referrals to special education. A mail questionnaire (N=T74; return rate=43%) found that a majority of teams meet once a week, during school hours, and consist of about nine members. SBIT members favor teacher intuition and classroom performance over data-based progress monitoring in deterrnining the effectiveness of interventions. The lack of personnel to perform …
What The Wind Brings, Sarah Donahue
What The Wind Brings, Sarah Donahue
Theses
This thesis describes the idea conception, story formulation, technical details, and presentation of a computer animated film entitled 'What the wind brings'. The film uses horses as its central theme.
Development And Characterization Of A Sub-Micron Cmos Process As An Educational Tool At Rit, Ivan Puchades
Development And Characterization Of A Sub-Micron Cmos Process As An Educational Tool At Rit, Ivan Puchades
Theses
None provided.
The Light Idea, Gabe Atiya
The Light Idea, Gabe Atiya
Theses
This thesis describes the idea conception, story formulation, technical details, and presentation of a computer animated film entitled "The day Joe Clark took flight."
Eye Movements And Natural Tasks In An Extended Environment, Roxanne Canosa
Eye Movements And Natural Tasks In An Extended Environment, Roxanne Canosa
Theses
Eye movements can be thought of as a window onto pre-conscious thought. Patterns of visual fixations over time as well as space can reveal cognitive strategies that are not amenable to conscious control or verbalization. A spatial analysis of an eye movement trace usually emphasizes the role that eye movements have in moving the retinal image of an object of interest from the periphery to the fovea for closer inspection. It is generally believed that a sequence of fixations across a region of space builds up the perception of a high-resolution field of view everywhere. Recent studies have shown that …
An Investigation Into Optimum Curve Setting For Overall Image Quality On The Xeikon Dcp/50d, Virginia Clemmens
An Investigation Into Optimum Curve Setting For Overall Image Quality On The Xeikon Dcp/50d, Virginia Clemmens
Theses
The Xeikon DCP/50D is a color, electrophotographic press. Its ability to handle variable data and variable page lengths make it a top competitor in the digital printing markets. The technology is a dry toner based system, set in a configuration of four units, and able to duplex in a single pass. Multiple jobs, handling multiple images and data can now be printed in sequence with no press adjustment needed between jobs. With this new technology come new issues in maintaining desired image quality on press. In traditional printing, such as offset, accounting for dot gain and transfer curves were an …
I And Another I, Jaegu Lee
Rhodium Trichloride Catalyzed Hydroboration Of 1-Octene: Unexpected Results, Anthony Sampognaro
Rhodium Trichloride Catalyzed Hydroboration Of 1-Octene: Unexpected Results, Anthony Sampognaro
Theses
Previous studies of the rhodium trichloride (RhCl3) catalyzed hydroboration of 1- octene showed a reversal of regiochemistry compared to the uncatalyzed reaction, and a complex mechanism was proposed to explain this phenomenon. Recent advances in analytical technique has revealed the presence of 4-octanol and 3-octanol. in addition to the expected 2-octanol and 1 -octanol products. The existence of these unexpected products has been attributed to the isomerization of 1-octene to internal isomers prior to normal hydroboration and oxidation, instead of the previously proposed mechanism. Initial kinetic studies indicated that the RI1CI3 catalyzed isomerization of 1-octene occurs too slowly to account …
Atmospheric Compensation For Seawifs Images Of Lake Superior Utilizing Spatial Information, Kirk Knobelspiesse
Atmospheric Compensation For Seawifs Images Of Lake Superior Utilizing Spatial Information, Kirk Knobelspiesse
Theses
Several assumptions are made with the established atmospheric compensation algorithm for images from the SeaWiFS remote sensing platform. One of these assumptions, the existence of Case I (optically clear) ocean water, cannot be made for images of Lake Superior. A modification to the established atmospheric compensation algorithm is presented, where empirical information and external spatial data are utilized to compensate for the atmosphere in all regions of the lake. The established SeaWiFS atmospheric compensation algorithm uses a form of the Dark Object Subtraction (DOS) method. SeaWiFS has two Near-Infrared (NIR) bands used for atmospheric compensation. At these wavelengths, Case I …
Interpretation For Our Times: East And West: Past Influences, Future Vision, Seong Kim
Interpretation For Our Times: East And West: Past Influences, Future Vision, Seong Kim
Theses
None provided.
The Creation Of Typographic Specifications For Desktop Publishing Software, Michelle Hill
The Creation Of Typographic Specifications For Desktop Publishing Software, Michelle Hill
Theses
As computers become more abundant in the home and office, more people are performing tasks that once would have been done by a skilled professional. Computers and software programs have become easier to use, including desktop publishing programs. Programs are now available that allow anyone to "become a designer." Through this, however, most typographers agree, the typographic quality of documents has suffered. Many companies are now designing their own media, in an effort to save money. The documents they create are adequate, but there is something missing. Though they may not be able to explain why, most people can appreciate …
An Investigation Of Thread Scheduling Heuristics For A Simultaneous Multithreaded Processor, Ralph Zajac Jr
An Investigation Of Thread Scheduling Heuristics For A Simultaneous Multithreaded Processor, Ralph Zajac Jr
Theses
Over the years, the von Neumann model of computing has undergone many enhancements. These changes include an improved memory hierarchy, multiple instruction issue and branch predic tion. Since the model's introduction, the performance of processors has increased at a much greater rate than that of memory. Several modifications to hide this ever widening gap in performance are being examined in current research. A very promising one is the Simultaneous Multithreaded processor. This architecture strives to further reduce the effects of long latency instructions, such as memory accesses, by allowing multiple threads of execution to be active in the processor at …
A Study Of The Effects Of Strain On Niti Shape Memory Alloy, Bret Oltmans
A Study Of The Effects Of Strain On Niti Shape Memory Alloy, Bret Oltmans
Theses
Shape memory alloys are materials that are capable of returning to an original shape after large deformations in response to a stimulus. Shape memory alloys can be metals, ceramics, polymers and gels. This thesis studies the changes of various properties of NiTi metal as samples are prestrained various amounts. After conducting various characterization techniques, relationships were developed for the changes in transformation temperatures, Knoop hardness number, and crystal lattice parameters. Through the use of differential scanning calorimetry and dynamic mechanical analysis the transformation temperatures were determined. It was observed in both experiments that the initial austenite start temperature(As) increased parabolically …
Autonomic Activity In Gulf War Veterans Using Heart Rate And Systolic Blood Pressure Variability, Maryann S. Fam
Autonomic Activity In Gulf War Veterans Using Heart Rate And Systolic Blood Pressure Variability, Maryann S. Fam
Theses
Heart rate variability (HRV) describes variations of heart rate and is attributed to cyclic fluctuations in autonomic tone. The different methods of heart rate variability analysis allow for a non-invasive assessment of autonomic activity. This study analyzes the heart rate variability through both frequency domain methods and joint time-frequency domain methods which were executed through the LabVJEW graphical programming language. These algorithms were utilized to assess autonomic nervous system activity in Gulf War veterans with no health complaints versus Gulf War veterans with chronic fatigue syndrome. The heart rate variability analysis was obtained from acquired measurements of heart rate and …
Reduction Of Peak To Average Power Ratio In Ofdm And Ofdm-Cdma System, Jie Cheng
Reduction Of Peak To Average Power Ratio In Ofdm And Ofdm-Cdma System, Jie Cheng
Theses
High Peak to Average Power Ratio is a main problem in Orthogonal Frequency Division Multiplexing(OFDM) system and Orthogonal Frequency Division Multiplexing -Code Division Multiple Access (OFDM-CDMA) system. Considering a compensated High Power Amplifier(HPA), in order to keep linearity for amplification, Input Back-Off(IBO) of the HP-A, has to be increased for handling a high PAPR. Higher 1130 will make HPA less efficient. Additionally, a signal with high PAPR will suffer clipping when PAPR is larger than 1130 of the HPA. Clipping can cause the distortion of the signal and deteriorate the performance of the system. Reduction of PAPR is a main …
Preparation And Properties Of Tantalum Silicide Films On Silicon Substrates, Lei Jin
Preparation And Properties Of Tantalum Silicide Films On Silicon Substrates, Lei Jin
Theses
Tantalum silicide (TaSi2) thin films were sputter deposited on p- type and n- type silicon substrates using VARIAN 3125 magnetron DC sputtering system with TaSi2 target. The thicknesses of TaSi2 thin films considered in this study are 200Å, 600Å and 1000Å, respectively. The TaSi2/Si wafers were annealed at temperatures in the range of 400 to 900°T. The sheet resistances of TaSi2 thin films with various thicknesses were measured by four-point probe before and after annealing. The sheet resistance decreases with increase in annealing temperature and decreases with the increase in thickness of TaSi …
Phase Tunability In A Conductor Backed Coplanar Waveguide Patch Antenna, Idan Mandelbaum
Phase Tunability In A Conductor Backed Coplanar Waveguide Patch Antenna, Idan Mandelbaum
Theses
Traditionally beam steering in phase array antenna systems is achieved using tunable phase shifters or switched feed networks. Here, a tunable patch antenna element is suggested as a novel alternative to a combination of a radiating element and a phase shifter. A conductor backed coplanar waveguide patch antenna is chosen due to its suitability to mounted external tuning elements, using varactor diodes. Limited types of lumped tuning circuits, using varactor diodes, have been tested, though a lumped as well as distributed tuning is feasible in the chosen antenna configuration. Approximate analytical models for coplanar waveguide patch antennas with finite ground …
Drowsy Driver Data Acquisition System, Rafael Norat
Drowsy Driver Data Acquisition System, Rafael Norat
Theses
This thesis focuses on detecting the drowsiness of a driver based on differentiation of the EEG signal activity between the eyes open and eyes closed states. Here, it is observed that there is a significant increase 'in a 10 Hz component of the alpha rhythm activity when the subject under test closes his / her eyes. This phenomenon was observed when electrodes were attached to the occipital region. A more desirable approach is to develop a non-intrusive measurement based on a multiturn differential coil combination utilizing a low noise high gain amplifier. The system developed here used an 80,000 turn …
Nanoporous Sio2/Vycor Membranes For Air Separation, Mihir Tungare
Nanoporous Sio2/Vycor Membranes For Air Separation, Mihir Tungare
Theses
Porous Vycor tubes with 40Å initial pore diameter were modified using low pressure chemical vapor deposition (LPCVD) of silicon dioxide N02). Diethylsilane (DES) in conjunction with nitrous oxide (N2O) was used as a precursor to synthesize these SiO2 films. The aim of this study was to obtain a considerable selectivity between species of comparable size and hence N2O was used. The use of N2O was believed to make the process self-limiting. DES was allowed to flow through the tube and N2O on the outside in the chamber at 550°C …
Nanofiltration-Based Diafiltration Process For Solvent Exchange In Pharmaceutical Manufacturing, Jignesh P. Sheth
Nanofiltration-Based Diafiltration Process For Solvent Exchange In Pharmaceutical Manufacturing, Jignesh P. Sheth
Theses
Commercially available solvent stable polymeric nanofiltration membranes were used to study the nanofiltration and diafiltration operations in the context of the pharmaceutical industry. Experimental results are presented for a two-step operation involving the preconcentration of a feed solution via nanofiltration followed by the replacement of the first stage solvent with a second solvent via diafiltration in two stages. Membranes MPF-50 and MPF-60, having molecular weight cut-offs of 700 and 400 respectively, were used in the present study. A solution of erythromycin (MW 734) in ethyl acetate was preconcentrated via nanofiltration followed by replacement of ethyl acetate with methanol via batch …
The Differences In Family And Non-Family Perceived Social Support Among White, African-American, Hispanic, And Asian Subjects, Elizabeth A. Houston
The Differences In Family And Non-Family Perceived Social Support Among White, African-American, Hispanic, And Asian Subjects, Elizabeth A. Houston
Theses
Perceived social support can be defined as the perception of an individ1tal to feel emotional support and involvement from other people. Research indicates that social support is an important factor in physical as well as mental health. Because of today's pluralistic society, it is necessary for counselors to have an understanding of the differences between cultures, or races. There are many differences in the values of individuals from varying cultures. This study focuses on determining the differences in familial and non-familial perceived social support between subjects who are White, African-American, Asian, and Hispanic. Volunteers from St. Louis Community College and …
Dot Gain Variation (A Study Of The Effects Of Dot Gain Variation To Improve Digital Workflow For The Xeikon Dcp/32d Digital Printing System), Voraphot Vacheravothan
Dot Gain Variation (A Study Of The Effects Of Dot Gain Variation To Improve Digital Workflow For The Xeikon Dcp/32d Digital Printing System), Voraphot Vacheravothan
Theses
Xeikon is a digital printing system that sends digital files directly to the press, thus eliminating film and plate processing. Technically, Xeikon is a web-fed press using electrophotographic technology to create information that is trans ferred to the substrate. From a marketing perspective, it is one of the preferred choices for on-demand, variable-data, and short-run printing because it has been proven to be an economical process than traditional offset. In the current printing process, the digital file is prepared as a postscript file and transferred to the Xeikon server and Xeikon Raster Image Processor (RIP) respectively. The computer section at …
Adobe Acrobat Image Compression: An Investigation Into The Effects Of Compression In Acrobat 4.0 On Image Reproducibility For Digital Printing, Kelly Thornton
Adobe Acrobat Image Compression: An Investigation Into The Effects Of Compression In Acrobat 4.0 On Image Reproducibility For Digital Printing, Kelly Thornton
Theses
The aim of this project is to investigate each [digitally printed file] compression setting in Acrobat 4.0 Distiller by using and comparing the effects of each on a digitally printed file. The goal is to define the visual results these compressions will yield according to the components of a given file.
Development Of An Intranet Website, Michelle Salimbene
Development Of An Intranet Website, Michelle Salimbene
Theses
Established in 1 990, Logical Design Solutions Incorporated (LDS) was among the first to recognize the World Wide Web (Web) as a platform for deploying serious enterprise solutions. LDS provides Global 2000 companies, such as AT&T Corporation (AT&T), with Internet, extranet, and intranet applications that solve real-world business problems. A leader in Web consulting, LDS offers a comprehensive set of solutions and services, from design to development, tailored to organizations with complex enterprise technology needs. In late 1997, AT&T requested LDS to begin developing an intranet strategy that would support AT&T's Cash Balance Pension Plan. AT&T, formerly known as the …
An Interactive, Graphical Typeface Identification System, Charles Iii Myers
An Interactive, Graphical Typeface Identification System, Charles Iii Myers
Theses
Most, if not all, published type identification books suffer from serious drawbacks which make them difficult to use by both typographic novices and professionals. Few effective computerized programs exist to simplify the identification of typefaces. The purpose of this project is to create an effective, visually attractive, interactive and easy-to-use model of a type identification system, which, if successful, will be fully developed. This is accomplished by combining the graphics and interactivity of the World Wide Web with the database management capabilities of modern database products. The user is given a series of "questions" regarding readily observable structural characteristics of …
An Investigation Into The Effect Of The Compression Algorithm In The Presence Of Shifting And Cropping On Image Quality, Ornsiri Thonggoom
An Investigation Into The Effect Of The Compression Algorithm In The Presence Of Shifting And Cropping On Image Quality, Ornsiri Thonggoom
Theses
Image compression is a form of data compression frequently used in digital imaging applications to improve the efficiency of transmission and storage. In order to have a manageable file size, the data compression is lossy, i.e. image information is lost. Lossy compression algorithms such as Baseline JPEG use the insensitivity of the human eye to high frequency information as a basis for the compression. Discrete cosine transforms (DCT) are performed on the data followed by variable quantization. And the image blocking has no exact regulations for the spatial variation. Using this technique, information is lost and the decompressed image is …