Digital Commons Network^™

Oxygen Tension Profiles In Tumors Predicted By A Diffusion With Absorption Model Involving A Moving Free Boundary, B. H. Arve, Athanasios I. Liapis

Chemical and Biochemical Engineering Faculty Research & Creative Works

The dynamic behavior of the oxygen tension distribution in tumors during radiotherapy is studied by the development and solution of a diffusion with absorption model involving a moving free boundary. The oxygen uptake rates within the tumor are considered to be functions of the oxygen concentration and results are presented for zeroth-, half-, first- and second-order rates of absorption, as well as when the rate of oxygen absorption is described by the Michaelis-Menten expression. The results presented in this work may be used together with the data from the oxygen radiosensitivity curve of a tumor, in order to determine the …

Distribution Automation For The Association Of Missouri Electric Cooperatives—A Statewide Evaluation Of Load Management, Jack F. Morris, Frank J. Kern

Electrical and Computer Engineering Faculty Research & Creative Works

Presented is an in-depth technical and economic feasibility study utilizing one- and two-way management systems for statewide load control and distribution automation. Included are 1) an evaluation of the generation and transmission load patterns of the state cooperatives and the determination of the amount of controllable load for use by a load management system, 2) an in-depth economic cost-benefit study as a result of implementing a load management system on a statewide basis, 3) communication alternatives for implementing the statewide load management and distribution automation system, 4) an investigation into using an existing statewide microwave communications system for direct load …

Behavior Of Reinforced Loess Specimens Under Triaxial Load, Mohammad Taghi Izadi

Masters Theses

"Effects of reinforcement on shear strength of a loessial (silty) soil arc studied. Unconsolidated undrained triaxial tests are performed on unreinforced and fabric reinforced soil specimens. Analyses of the test results showed that in general the shear strength of remolded loess specimens were improved substantially and increase in the shear strength was directly related to reinforcement spacing.

The mechanism of soil-reinforcement interaction and several existing analytical models are described. A modified analytical model based on enhanced confining theory is developed. This model can be used in assessing the effects of the reinforcement on shear strength of triaxial specimens. Comparison of …

Dynamic Timoshenko Beam-Columns On Elastic Media, Franklin Y. Cheng, Chris P. Pantelides

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Differential equations, stiffness coefficients, and fixed-end forces are formulated for a Timoshenko beam-column on an elastic foundation subjected to lateral time-dependent excitations and static axial loads. The theoretical formulation includes shear and bending deformations as well as rotatory inertia, with emphasis on two approaches. The two approaches differ in terms of the assumed shear component of the static axial load on the cross section. The first approach is based on the assumption that the shear component of the axial load is calculated from the total slope; in the second approach, the shear component of the axial load is calculated only …

Static Timoshenko Beam-Columns On Elastic Media, Franklin Y. Cheng, Chris P. Pantelides

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Two approaches are used to derive differential equations, stiffness coefficients, and fixed-end forces for the analysis of structural systems composed of Timoshenko beam-columns that may be supported by an elastic foundation. The analysis is for the evaluation of the critical static axial load and buckling mode-shapes of a structure with consideration of elastic media, bending, and shear deformations. The two approaches differ in terms of the assumed shear component of the static axial load on the cross section. The first approach is based on the assumption that the shear component of the axial load is calculated from the total slope, …

Improved Streamline-Generating Technique That Uses The Boundary (Integral) Element Method, Daopu Thompson Numbere, D. Tiab

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

The boundary element method (BEM) has been used to generate streamlines for homogeneous and sectionally homogeneous reservoirs having irregular boundaries. This technique is superior to earlier methods that use 'image wells' to simulate the reservoir boundary, especially for cases where the reservoir boundary is irregularly shaped. It has wider applicability to different kinds of reservoirs and eliminates the need for trial-and-error solutions. The errors caused by discretization and numerical approximation arise on and adjacent to the boundaries only, therefore the pressures and pressure gradients on which the streamlines are derived can be calculated with very high accuracy in the interior …

Off-Axis Multimode Light Beam Propagation In Tapered Lenslike Media Including Those With Spatial Gain Or Loss Variation, Anthony Alan Tovar

Dissertations and Theses

The propagation of light beams in inhomogeneous dielectric media is considered. The derivation begins with first principles and remains general enough to include off-axis asymmetric multimode input beams in tapered lenslike media with spatial variations of gain or loss. The tapering of lenslike media leads to a number of important applications. A parabolic taper is proposed as a model for a heated axially stretched fiber taper, and beams in such media are fully characterized. Other models are proposed by the concatenation of a parabola with other taper functions.

A Simple Solid-Phase Electrophoretic Procedure For The Separation Of Plasmid Dna, Linda Ann Simurra

Biological Sciences Theses & Dissertations

A method was developed for extraction of plasmid DNA from bacterial cells embedded in agarose blocks. Cell - containing blocks were treated with various lysing reagents and inserted into the wells of an agarose gel. Upon electrophoresis the plasmid DNA migrated out of the embedding block and into the gel leaving intact chromosomal DNA in the well. This method was tested with various organisms and found to be effective for plasmid isolation. In comparison to "traditional" procedures, this new method is less tedious since chemical separation of plasmids is not required prior to electrophoresis. Also, a higher yield of plasmid …

Application Of Computer Techniques In Groundwater Contamination Studies, Komratchi Raman

Theses

A study has been undertaken to provide insight into two related aspects of groundwater contamination studies - contaminant transport behavior and its analysis by modeling techniques. The study reviews recent research that explains some of the uncertainties in the transport and fate of chemical contaminants in groundwater. Approaches to modeling techniques and data reduction are developed to illustrate their usefulness in analysing existing groundwater data, and to make predictions on the future water chemical characteristics. Three types of study areas have been chosen for this purpose, each representing a different type of groundwater contamination problem. The first study area has …

A Laboratory Simulation Of A Rotary Vacuum Drum Brownstock Washer, Hugh E. Muller

Masters Theses

Mass balances can quantify the dilution and thickening of a liquor/fiber suspension on a brownstock washer. However, the complex displacement process necessitates an empirical approach. Given empirical data, washers can be optimized through use of efficiency factors with mass balances.

Because empirical data is difficult to obtain, a laboratory washing method was developed to empirically generate displacement efficiencies on pulp under mill washer conditions. Reproducible data generated by this method resulted in a displacement/dilution function as seen on mill washers. A laboratory simulation using mill samples, exclusive of problems for one vacuum drum, resulted in comparable efficiencies with less than …

Irish H & V News

Building Services Engineering

No abstract provided.

Fall 1987, Wmpg 90.9fm

WMPG Program Guides

WMPG program guide for Fall 1987

Includes notes from Program Director, information on shows and events, and schedule.

Santa Clara Magazine, Volume 30 Number 1, Fall 1987, Santa Clara University

Santa Clara Magazine

10 - CAN THERE BE DISSENT IN CATHOLIC UNIVERSITIES? SCU's president makes clear where the University stands on this important issue. By William J. Rewak, S.J.

17 - WHAT'S AHEAD IN THE WORLD OF HIGH TECH? Former Business ~ek reporter Jack Wilson looks to the future of Silicon Valley.

21 - GREEKS ON CAMPUS-HERE TO STAY? What makes sororities and fraternities appealing to SCU undergraduates?

28 - GLASS IMAGE Tom Kelly '72 unlocks memories of classmate Charlie Glass after Glass's abduction last June.

30 - THE AGE OF AQUARIUS REVISITED Six members of the class of '67 talk about their …

Effects Of Hysteresis With Air Entrapment On Water Flow In The Unsaturated Zone, Jagath J. Kaluarachchi, J. C. Parker

Civil and Environmental Engineering Faculty Publications

Effects of hysteresis with air entrapment on water content and head distributions, surface fluxes, and water balance components are investigated by finite element simulations of flow in one- and two-dimensional spatial domains. Results of one-dimensional analyses indicate that effects of hysteresis are markedly influenced by surface boundary conditions and to a lesser extent by initial conditions. Stipulation of flux-controlled boundary conditions results in minimal hysteretic effects, while potential-type boundary conditions produce substantial deviations between hysteretic and nonhysteretic simulations. The latter effects are attributable in large part to differences in surface conductivity associated with air entrapment. Predicted water content distributions for …

Evaluation Of Word Processing Cost Effectiveness, Nicholas E. Tedesco

Theses

The objective of this thesis is to examine the use of word processing technology to determine if its implementation is a cost effective investment. This will be accomplished by comparing the cost of a typewritten page before and after the implementation or upgrade of word processing equipment. The degree of utilization and the impact of utilization on standard costs will also be examined.

Significant difficulty was encountered attempting to locate and compile statistical information on word processing. Therefore, a questionnaire was developed and distributed to the 100 largest public and 100 largest private companies headquartered in New Jersey, requesting information …

The Relationship Between Linguistic And Image Based Learning Approaches For Complex Problem Solving: A Case For Computer Generated Animation In Instructional Presentation Of Complex Technical Processes, Stanley T. Bissinger

Graduate Research Papers

The purpose of this study is to provide a rationale for development of new approaches to educating students about complex technical processes. This study may also prove helpful for determining what type of technical content is better suited for computer animated presentation.

Direct Simulation Of Hypersonic Transitional Flows Over Blunt Slender Bodies, Vincent Cuda Jr.

Mechanical & Aerospace Engineering Theses & Dissertations

Hypersonic transitional flow has been studied using the Direct Simulation Monte Carlo method. The cylindrically blunted wedge and spherically blunted cone were examined for body half angles of 0°, 5° and 10°, at a flight velocity of 7.5 km/s, zero angle of incidence and altitudes of 70 to 100 km. Those geometries and flow conditions are important considerations for hypersonic vehicles currently under design. Surface chemistry was examined for diffuse, finite-catalytic surfaces. Nonequilibrium chemistry and nonequilibrium thermodynamics were considered for both configurations at all altitudes.

Numerical simulations showed that rarefied gas effects, such as surface temperature jump and velocity slip, …

Computational Aspects Of Chance‑Constrained Regional Modeling, R. R.A. Cantiller, Richard C. Peralta

Civil and Environmental Engineering Faculty Publications

A methodology that incorporates the stochasticity of an aquifer parameter in a chance-constrained steady-state groundwater management model is presented. Results and computational aspects of the modeling effort are discussed.

Maximizing Reliable Crop Production In A Dynamic Stream/Aquifer System, Richard C. Peralta, K. Kowalski, R. R.A. Cantiller

Civil and Environmental Engineering Faculty Publications

Reliable production of a dynamic stream/aquifer system is determined through an implicitly stochastic optimization model. Adequate representation of the inflow process and dynamic modeling of the stream/aquifer system results in optimum crop yield at specified reliability levels. Results include optimal spatial and temporal allocation of groundwater and diverted river water use. These can be used for planning cropping patterns and evaluating potential diversion systems.

Emerging Policy And Strategy Choices For Protection Of The Groundwater Resource, Richard H. Braun

Water as a Public Resource: Emerging Rights and Obligations (Summer Conference, June 1-3)

22 pages.

Contains 2 pages of references.

Fibrin Glue For Spilt-Thickness Skin Grafts And Microsurgical End-To-End Arterial Anastomoses In Live Rats, Susan Diane Drastal

Theses

Fibrinogen and thrombin were combined to make a "glue" for adherence in microvascular anastomoses and split-thickness autologous skin grafts in rats. The powdered human fibrinogen and bovine thrombin were mixed with sterile water and each applied drop-wise through separate syringes in equal concentrations. A gelatinous clot formed in 10 seconds, and was completely coagulated in 45 seconds. In part I, one-half of the group had their grafts sutured, and one-half had their grafts glued in place.

In part II, microvascular arterial anastomoses were performed. Group I had their arteries reanastomosed using sutures only; group II had their arteries reanastomosed by …

Analysis Of Nitrated Polycyclic Hydrocarbons, Pah-Quinones And Related Compounds In Ambient Air, Yalan Wang

Theses

Studies were conducted to characterized airborne particulate extractable organic matter (EOM) with respect to chemical composition and biological activity. It has been well established that the nitrated polycyclic hydrocarbons (nitroPAH) are environmental contaminants. To identify nitro-PAH in ambient air sample, a technique was developed involving introduction of a reducer column into an reversephase high performance liquid chromatography (HPLC) system. Strong fluorescence signals were achieved from nitro-PAH and detected together with u.v. signals for the qualitative and quantitative analysis of nitro-PAH. 2-Nitrotriptycene was synthesized according to published procedures and used as an internal standard. By use of the above technique, 9nitroanthracene, …

A Study Of Failure Modes In Rock Resulting From Pile Penetration, Girish Mehta

Theses

The purpose of this thesis was to physically examine the failure mode of a rock mass as a result of pile penetration. In addition, the static bearing capacity of piles bearing in rock was investigated. This was accomplished in the laboratory by performing model tests using a dynamic pile driving device.

Tests were performed using 1 inch nominal diameter model pipe piles and H-piles. Piles were driven into a simulated rock mass consisting of clay-masonry bricks. Following pile driving, the rock mass was carefully dissected and observations of the failure mode were made.

A new technique was developed to preserve …

A Study Of The Dynamics Of Microbial Competition For A Single Resource In A Chemostat Between Reversible Attachment To Solid Surfaces, Pericles Theofilos Lagonikos

Theses

It is known that two microbial populations competing for a single non-renewable resource in a homogeneous environment with time-invariant inputs cannot coexist in a steady state. The case where two microbial populations exhibiting reversible attachment to the walls of a chemostat compete for a single resource is studied theoretically. Because of the cell's attachment to the walls, the environment is no longer homogeneous. The present study considers the case where the attached cells form no more than a monolayer. The Baltzis-Fredrickson model is used to represent the attachment to the walls. In one system the attachment of cells of the …

Just-In-Time In The United States : Culture And Competitive Manufacturing, Wolfram Pabst Von Ohain

Theses

Richard Schonberger, 'the' Guru of Just-in-Time' in the United States, wrote in the preface of his 1986 book World Class Manufacturing:

"...Japanese success is rot mature-based. Its basis is a quite different set of concepts, principles, policies, and techniques for managing and operating a manufacturing enterprise. All of it is easy to understand, not hand to accept (once known), eminently teachable and learnable, and not so difficult to apply.

If Just-in-Time is such 'a piece of cake' one would expect that most American companies would practice Just-in-Time. As commonly known, most American companies do not follow the philosophy of Just-in-Time. …

Office Automation, Nanda Kishore Krishnaiah

Theses

This thesis gives an overview of the technology available to management for implementing office automation. It explores the methodology for creating an integrated automated office. It discusses methods for linking automated offices through the concept of networking and it addresses the major behavioral aspects associated with the implementation of automation in the office. The most significant part of this thesis is that the conceptual design model is illustrated by the application to an actual case study. The author was involved as a team member in an automation project with the Center for Information Age Technology, at New Jersey Institute of …

Sorption Characteristics And Their Effects On Geotechnical Properties Of Illite, Gnanmoorthy Selvakumar

Theses

An experimental investigation of the sorption characteristics of phenol, chlorophenol and chlorobenzene on to illite and of the effect of sorption on the geotechnical properties of illite was performed. Various adsorption isotherms have been considered for the equilibrium adsorption study data. It was found that the Freundlich adsorption isotherm closely fits the experimental results. In addition, the results of desorption study indicated that the sorption process for these systems is not completely reversible.

The index properties of illite were found to be influenced by the sorption of contaminants, i.e., the Atterberg limits of illite increased in accordance with increases in …

Acuta Enews April 1987, Vol. 16, No. 4

ACUTA Newsletters

In This Issue

New Haven Seminar

Telephone System Installation Some Helpful Hints

Party Line

Building Wiring Options

Potpourri

Facilities Management Market to Grow

Santa Clara Magazine, Volume 29 Number 3, Spring 1987, Santa Clara University

Santa Clara Magazine

10 - AROUND THE WORLD IN 500 DAYS How and why Mike Brozda stepped off the treadmill and onto the "road less traveled." By Mike Brozda

16 - TURNING OFF TV's MIND-SET Confessions of a "cultural heretic" who turned off TV and selected a different channel. By Mitch Finley

19 - ADVOCATE FOR THE UNDERDOG Peter Conk '71, as seen through the eyes of faculty friend and mentor, Father Tenny Wright, S.J. By Tennant C. Wright, S.J.

24 - LETTING GO A three-step lesson in the fine art of delegation on the way to becoming a leader. By Timothy W. …

Experimental Study Of Shock Wave Interference Heating On A Cylindrical Leading Edge, Allan R. Wieting

Mechanical & Aerospace Engineering Theses & Dissertations

An experimental study of shock wave interference heating on a cylindrical leading edge representative of the cowl of a rectangular hypersonic engine inlet at Mach numbers of 6.3, 6.5, and 8.0 is presented. Stream Reynolds numbers ranged from 0.5 x 10⁶ to 4.9 x 10⁶ per foot and stream total temperature ranged from 2100 °R to 3400 °R. The model consisted of a 3-inch-diameter cylinder and a shock generation wedge articulated to angles of 10, 12.5, and 15 degrees. The primary goal of this study was to obtain a fundamental understanding of the fluid mechanics of shock wave …