Digital Commons Network^™

Santa Clara Magazine, Volume 32 Number 1, Fall 1989, Santa Clara University

Santa Clara Magazine

10 - A TIME TO DIE? The debate over euthanasia changes and grows more interesting as we grow older and live longer. By Julie Sly

15 - LOOKING FOR LIFE IN SPACE SCU's scientist-in-residence talks about how resumption of planetary probe aids his origin of life research. By Maureen Mclnaney

20 - MEMORIES - THE WAY WE WERE A 1939 alumnus tells what Santa Clara was like 50 years ago and offers vignettes of Jesuits he remembers. By Norman Bayley

24 - EASTSIDE PROJECT Students and faculty are involved in this special partnership between SCU and East San Jose communities. …

On-Line Dot Matrix Code Verification, Thatta V. Premnath

Theses

Machine vision principles are increasingly applied in the areas of manufacturing and automated inspection. The objective of this thesis work is to investigate different methods that could be implemented for matching printed dot matrix characters with the actual characters to be printed.

In support to this investigation, a survey of various methods proposed by researchers in the field of Optical Character Recognition (OCR) is presented. Survey includes a detailed description of the state-of-the art methods. It is shown that due to restrictions of hardware cost and the time available to inspect each character, the standard approaches are not practical. Hence, …

On The Orders Of Magnitude Of Epigenic Dynamics And Monoclonal Antibody Production, Joanne M. Savinell (Belovich), Gyun Min Lee, Bernhard O. Palsson

Chemical & Biomedical Engineering Faculty Publications

The hybridoma cell's maximum capacity for monoclonal antibody (MAb) production is estimated to be 2300–8000 MAb molecules/cell/s, using measured rates of transcription and translation, and the limitations imposed by the size of the polymerase molecule and the ribosome. Nearly all the production rates reported in the literature fall into or below this range of production rates. Data from batch cultures of hybridomas demonstrate a constant specific rate of MAb production until the time integral of the viable cell concentration reaches about 10⁸ cells · h/cm³. At this point, some essential nutrients from the standard media …

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, September 1989, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

A twelve page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.

Protocol Processing Delay Analysis On Ethernet By Simulation Of Njit Ethernet, Jagdish Gangrimal Rangwani

Theses

CSMA/CD based Local Area Networks account for about 75% of the installed LAN base today. As these networks are becoming available for high channel bandwidth, it is important to identify the bottlenecks in these networks. As channels are becoming high speed, bottleneck is shifting from channel to protocol processing. This delay depends on a particular implementation of the protocol and not the protocol standard itself.

This Thesis presents the analysis of delay on Ethernet. To achieve realistic results NJIT Ethernet, as it is configured, is modelled and simulated. Traffic on this network is measured and load on each segment is …

Analytical Determination Of The Complex Dielectric Function Of An Absorbing Medium From Two Angles Of Incidence Of Minimum Parallel Reflectance, R. M.A. Azzam

Electrical Engineering Faculty Publications

The real and imaginary parts of the complex dielectric function (or complex refractive index) of an opaque substrate or a thick film can be determined from two pseudo-Brewster angles measured in two transparent incidence media of different refractive indices. This two-angle method is simple in that it involves no photometric or polarimetric analysis and in that the solution for the optical properties in terms of the measured angles is explicit, analytical, and direct (i.e. noniterative). The two-angle method is demonstrated for an opaque TiN film on a Cleartran ZnS substrate as a specific example. The effect of angle-of-incidence errors on …

Spontaneous Mode Locking In Long-Cavity Xenon Lasers, Manuela Fe Tarroja, Mohammad Sharafi, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

Spontaneous mode locking in Fabry—Perot xenon lasers has been experimentally investigated for cavity lengths up to 66 m. Our results show dependence of the number of pulses per round-trip time on the cavity length and the excitation current. Other dynamical effects such as the ringing and modulation of the mode-locked pulses have been observed. A semiclassical model for the self-locking of an inhomogeneously broadened laser is also presented. Numerical results based on this model describe many dynamical features observed in our experiments.

Acuta Enews July 1989, Vol. 18, No. 7

ACUTA Newsletters

In This Issue

President's Message

ACUTA Welcomes Two New Staff Members to Serve you!

Nanci Unger, Publications Editor

Don't Miss ACUTA's 18th Annual Conference and Exhibit Show July 23-27 in Philadekphia

Kellie Preston Promoted to Staff and Events Coordinator

Another First for ACUTA: Live Satellite Transmission Planned for Annual Conference

Irish Building Services News

Building Services Engineering

No abstract provided.

Design Of Robotic Lan Controller And Map Interface, Jayesh M. Joshi

Theses

An application specific integrated circuit has been designed for use as a gateway between two local area networks. This silicon chip provides the gateway function to link the NJIT robotics network and the MAP IEEE-standardized network. This IC utilizes the available Motorola MC 68824 Token Bus Controller for the MAP data path. A special IO design compatible with an optical communication link is used to interface into the NJIT RLAN network.

The gateway IC serves as an asynchronous buffer between the 5Mbps MAP link and the 500 bps local optical link. The control protocol provides the master function for polling …

On-Farm Reservoir Construction In The Grand Prairie Region Of Arkansas: An Engineering Economic Analysis, Jayson K. Harper, Richard C. Peralta, Robert N. Shulstad

Civil and Environmental Engineering Faculty Publications

No abstract provided.

Biodegradation Of Benzene And A Btx Mixture Using Immobilized Activated Sludge, Mayur Padamshi Lodaya

Dissertations

Aerobic biodegradation of benzene was studied using activated sludge immobilized in calcium alginate (immobilization by entrapment), and also attached to a silica based catalyst.support (immobilization by attachment). Hydrogen peroxide was used as a source of dissolved oxygen to eliminate physical removal of benzene due to aeration. Abiotic losses of benzene were accounted for.

A recirculation reactor, run in both batch and continuous feed mode, was used to determine the kinetic parameters. The system response was examined by tollowing changes in benzene concentration, flow rate, and biomass loading. The system was modeled mathematically and the kinetic parameters were determined.

Biological removal …

Anaerobic Biodegradation Of Trichloroethylene With The Addition Of Sugar Using Activated Carbon-Fluidized Beds, Suxan Huang

Dissertations

Anaerobic biodegradation of trichloroethylene (TCE) was carried out in a two-stage granular activated carbon fluidized bed bioreactor. The intermediate products were identified as: dichloroethylene (DCE), vinyl chloride (VC), 1,2-dichloroethane (DCA) and chloroethane (CA). Of the three geometric isomers of DCE, the trans-1,2 dichloroethylene (TDCE) was found to be the most predominant species, The production of DCA suggested a diverted reaction sequence from the conventional sequential reductive dechlorination pathway postulated in the past literature. CA was believed to be a product of VC and/or DCA. The co-substrate glucose was implicated for this reaction specificity. Based on our data and on other's …

Air Stripping Of Volatile Organic Contaminants Using Rotating Disc Contactor, Kai-Ping Hsueh

Dissertations

Previous studies have suggested that the transfer of VOCs to the atmosphere by air stripping may be a convenient and potentially cost-effective method to remove these compounds from the water. A Rotating Disk Contactor (RDC), similarly to other aeration devices, can provide intimate contact between the VOC-bearing water and air. It is believed that under carefully selected operating conditions, the RDC system are more competitive with packed tower than other aeration methods. The objectives of this study were to evaluate the feasibility of using the RDC to strip VOCs from the contaminated water and to develop a mathematical model to …

Anaerobic Biodegradation Of Trichloroethylene By Activated Carbon Fluidized-Bed, Yeam-How Chin

Theses

Abstract - The biodegradation of Trichloroethylene by using anaerobic activated carbon fluidized bed has been investigated in the present study. High quality effluent was obtainable when the TCE influent concentration was up to 2.4 ppm in the first stage. Glucose was introduced as a cosubstrate to determine the effects of glucose/TCE ratio on the COD, Glucose and TCE removal. The experimental data indicates that the overall TCE removal efficiency was only slightly affected by TCE loading, but the first stage performance was significantly influenced by TCE loadings. It was also found that the microbial activities were affected by TCE loadings …

Thermal Desorption Of Phenol Contaminated Clay Soils, Chia-Ling Ting

Theses

Clay mineral/organic reactions have been studied extensively by a numerous physicochemical methods. There also has been extensive research done in the areas of adsorption, Lewis acid-base reactions, desorption, adduct formation. Many of these studies explain the role and dehydration of silicates.

Studies have shown through extraction, thermal analysis, and gas chromatography. That there is more than one type of bonding, weak and strong, taking place between the clay mineral and the organic waste.

In order to determine the practicality of the containment technology, this research has been investigated by using more powerful tools, such as thermogravimetric analysis, differential scanning calorimetry …

Ph Parametric Pumping : An Examination Of Different Feed Locations For A Two And Three Column Process With The Same Flow Patterns And Ph Distribution, Roberta Rosty

Theses

PH parametric pumping is used to separate protein mixtures of hemoglobin and Albumin.

In this thesis, modifications to a two-column process, where the fluid stage flow pattern and the pH distributions were constant, were explored. These modifications consisted of: changes in the feed stream inlet and outlet locations, changes in the amount of feed itself, and an addition of another column and reservoir to the original two-column process. The results were obtained through computer simulation.

Results indicate that the batch or no-feed two and three column processes yield better separations of the two proteins than the same processes with feed …

Rays And Beams Near The Shadow Boundary, Weixing Gao

Theses

Asymptotic techniques in wave propagation problems exhibit attractive features in computational aspects compared to numerical methods. However, they experience problems in complicated environments due to the transition regions associated with them. The transition region involving a shadow boundary in the downward refractive index profile has been investigated. The ray paths were determined solving the ray equation analytically. The Green's function due to a line source is constructed and evaluated using numerical integration (reference solution) and asymptotic techniques. Then, the field produced by the source, is synthesized, using superposition of beams generated from complex source point representation. The floating parameters such …

Computer Controlled Oxygen Bioreactor, Dinesh Sachdeva

Theses

A computer controlled oxygen bioreactor has been designed to obtain more accurate values for oxygen bioreactor requirements and to optimize oxygen productivity with respect to oxygen concentration. This study solves a specific problem relating to oxygen concentration measurement and bioreactor control. The proposed reactor system is computer controlled to insure a desired oxygen concentration supply to an oxygen consuming reaction or organism. This thesis also explains and illustrates the bioreactor and its computer control system.

The computer controller incorporates oxygen sensing, oxygen measurement and temperature measurement, Electrical circuits have been designed and built for proper signal conditioning, data acquisition, data …

Mathematical Model Of A Continuous Sterilization System For Fermentation Media Containing Suspended Solids, Mark A. Leskowicz

Theses

A mathematical model has been developed for a continuous sterilization system where the role of suspended solids on the overall degree of sterilization achieved is taken into account. Evaluation of a "typical" commercial continuous sterilization system showed the role of suspended solids to have little effect on the overall sterilization obtained. For continuous sterilization systems operating in a total residence time of less than one minute, the role of solids may become important and should be evaluated.

A Study Of The Effect Of Some Inhibitors On The Corrosion Rates Of Austenitic Stainless Steels In Sulfuric Acid, Shang-Yinn Chiou

Theses

Four sulfur-containing and three nitrogen-containing organic compounds have been tested as inhibitors for four different austenitic stainless steels-SS304, S5316, SS317L, and SS41O-in 10-50 weight% sulfuric acid solutions respectively. Results confirmed that the sulfur-containing compounds were more effective than the nitrogen-containing compounds. The effect of sodium iodide additions on the behaviours of two of the nitrogen-containing compounds was also studied. The synergistic effect caused by the 1 ion was essential for nitrogen-containing compounds as inhibitors in sulfuric acid solution.

The Kinetics Of Degradation Of 1,2-Dichloroethane, 1,1,1-Trichloroethane And 1,1,2,2-Tetrachloroethane In A Photoreactor Using Ozone, Hydrogen-Peroxide And Ultraviolet Radiation, Yuan-Shen Li

Theses

The experiments to oxidize the refractory chemicals, 1,2- Dichloroethane, 1,1,1-Trichlotoethane and 1,1,2,2- Tetrachloroethane using Ozone, Hydrogen Peroxide and Ultraviolet Radiation have been conducted in a ss-304 photoreactor. The reaction kinetic models have been proposed and through the experiments we demonstrate that these models for these compounds perfectly. Analysis is done by gas chromatograph for the substrate concentration and the gas/liquid mass transfer coefficients are calculated. The reaction late constants are determined by use of the Rosenbrock Hillclimb Optimization Algorithm in conjunction with the Fourth-Order Runge- Kutta method on a digital computer. By comparing the effects of O₃,O_{3 …}

One-Dimensional Parametric Inverse Scattering For Lossless Dispersive Media, Frank Gangi

Theses

In this thesis, the effects of high frequency noise on a perturbational inversion algorithm for a stratified dispersive medium are investigated. It is shown that the perturbational algorithm becomes unstable under high frequency noise. The physical origin of this instability is discussed.

In order to enhance the robustness of the perturbational inverse scattering solution, a parametric inversion algorithm is implemented. The improvement by the use of a parametric inversion is given quantitatively by the profile-to-error ratio (PER). Examples of the two-pole and the three-pole reflection coefficients are compared and contrasted.

Statistical Multiplexing Of Video Sources For Packet Switching Networks, Krishna Kancherla

Theses

Communication networks are fast evolving towards truly integrated networks handling all types of traffic. They employ integrated switching technologies for voice. video and data. Statistical or asynchronous time division multiplexing of full motion video sources is an initial step towards packetized video networks. The main goal is to utilize the common communication channel efficiently, without loosing quality at the receiver. This work discusses the concept of using statistical multiplexing for packet video communications. The topology of a single internal packet network to support ISDN services has been adopted. Simulations have been carried out to demonstrate the statistical smoothing effect of …

Reactor Design For Hazardous Waste Treatment Using Immobilized Phanerochaete Chrysosporium, Ikram Ul Haq

Theses

The degradation of 2-Chlorophenol by Phanerochaete chrysosporium, a white rot fungus, was studied in three different reactor configurations, namely a batch reactor, a chemostatic reactor with the fungus immobilized on a silica based porous biocatalyst, and a packed bed reactor utilizing balsa wood chips as packing.

Preliminary experiments indicated that the use of porous solid support improved the degradation rate in batch reactor and chemostatic reactor. However, the packed bed configuration was found to be superior, and was studied in greater detail. The apparent Michaelis-Menten kinetic constants were obtained for the packed bed reactor.

Nonlinear, Metal-Clad Optical Waveguide, Bhavesh Patel

Theses

Planar optical waveguides consisting of different types of films including nonlinear films with metal cladding have been studied theoretically. Ideal metal cladding with σ = ∞ and nonideal metal cladding with σ ≠ ∞, that is, with complex refractive index is considered to get electric field and wave number for TE₀ mode. For nonlinear material, approximate solution is derived in a series form using Rayleigh-Schrodinger method. The appropriate eigenvalue equations are solved by Newton-Raphson iteration method. For self-focusing media in the center, the propagation constant increases with increasing power and with self-focusing media in the cladding the propagation constant …

Laboratory Model Studies Of Pneumatic Fracturing Of Soils To Remove Volatile Organic Compounds, Panayiotis Papanicolaou

Theses

Bench-scale laboratory studies were conducted from January 1988 to October 1988 to demonstrate the feasibility of using Pneumatic Fracturing* to enhance the removal of Volatile Organic Compounds from the vadose soil zone. Experiments were conducted to investigate: 1) The effect of pneumatic fracturing on the rate of contaminant removal; and 2) the injection pressures required to initiate soil fracturing.

Contaminated soil was placed and compacted in three identical 15 inch square by 30 inch high plexiglass tanks. The first tank was equipped with a vapor extraction system consisting of vacuum and/or positive air injection. The second tank was equipped with …

Measurement Of Biodegradation Aniline, 2,4-Dichlorophenol, 1,2,4-Trichlorobenzene Using Microcalorimetric Method, Lung-Weng Yao

Theses

Biodegradation of aniline, 2,4-dichloro-phenol, and 1,2,4-trichlorobenzene by using micro-calorimetric method under aerobic condition has been investigated. The rate of heat energy output during the course of log growth phase was kinetically expressed by inhibition equation. The constants of Um(the maximum energy production rate), Ks(saturation rate), Ki(inhibition constant), and n(degree of inhibition) has been of 8.764hr-1, 0.13mg/L, 0.136mg/L, and 4.6 for 2,4-DCP; 3.33hr-1, 0.315mg/L, 0.35mg/L, and 1.4 for 1,24-TCB; 3.639hr-1, 0.4485mg/L, 0.485mg/L, and 5 for aniline.

Csma/Cd Lan Performance : Modeling And Simulation In Csim, Nanda K. Kanuri

Theses

A simulation model to analyze the performance of CSMA/CD protocol is developed. CSIM, a process oriented simulation language, is used. Performance measures such as throughput, average delay and maximum delay per packet are presented. System performance is analyzed for different loads, number of stations, and network lengths, with packet length as parameter. By trading off the throughput and delay time, an optium packet length can be selected from simulated performance curves. A general scheme for MAC protocols modeling is provided.

Distributed Data Collection System Based On Hierarchical Network, Harish Mahindrakar

Theses

On line data collection systems are essential in order to satisfy the requirements for real-time applications. Typical applications are computer integrated manufacturing, security control, hourly wage calculations, human resources management. On line data collection system makes it possible to closely monitor and track different operations with more accuracy. On line data collection systems eliminate redundant work, save time and money.

If the distributed system is based on a multicontroller, it becomes really cost effective solution to build such a system.

This effort is the design of a distributed multicontroller system, required in a data collection system. A hierarchical network is …