Digital Commons Network^™

Users' Manual For The Electronic Information Exchange System, Computerized Conferencing & Communications Center, Elaine B. Kerr, Murray Turoff, Peter Johnson-Lenz, Trudy Johnson-Lenz

Computerized Conferencing and Communications Center Reports

The purpose of this manual is to teach you the simpler parts of the system and make you comfortable with using the one-page User's Guide. As you gain more experience with the system, you may wish to learn some of the advanced features available. But EIES (pronounced "eyes") has been designed so that you don't need to learn more than meets your needs.

Since the best way to learn how to use a computer system is by direct experience, don't be discouraged if some of this manual is confusing at first. The most effective way to learn is to try …

An Experimental Study Of Comparison Between Ph-Parametric Pumping And Ph-Cycling Zone Adsorption Process On Protein Separation, Vincent P. Jajalla

Theses

In this thesis, an experimental investigation was conducted to compare the performance of the continuous pH-parametric pumping and the pH-cycling zone adsorption process on protein separation.

The model system studied was hemoglobin-water. on CM-Sepharose CL-6B (cation) exchanger in a single-column system. Various modes of operation were tried on both the pH-parametric pumping and the pH-cycling zone adsorption method. The separation factors for each mode of operation were computed and compared.

It is shown that the continuous pH-parametric pumping, with circulation to insure the pH uniformity inside the column, has the better separation factor than the pH-cycling zone adsorption method.

Reactions Of Atomic Hydrogen With Selected Halomethane, Sriram Chari

Theses

The kinetics of the reactions of atomic hydrogen with methylene chloride and carbon tetrachloride were studied spectroscopically and chromatographically using a 4 cm i.d. discharge flow reactor at pressures of 1 to 8 mm Hg absolute and room temperature. Hydrogen atom concentrations were measured by chemiluminescence titration with nitrogen dioxide. Evidence was found for the formation of atomic carbon intermediate in the reaction with carbon tetrachloride, but methane and HCl were the chief products in both reactions for reaction times of 150 ms and higher, showing that secondary reactions were so fast that almost all halomethane consumed went toward the …

Analysis Of Oscillations In Nonlinear Systems Using Multiple Input Describing Functions, Frederic Lee Swern

Dissertations

Sufficient conditions for oscillation as well as absence of oscillations are presented for a class of systems containing one lumped linear element and a differentiable nonlinearity. The results are obtained by estimating the error inherent in using a describing function analysis. Contraction type arguments are used to show common topological properties of the describing function solution and the balance of first harmonic terms of the system.

After discussing the describing function method, two theorems are presented regarding existence or nonexistence of oscillations from homotopic considerations. A graphical method for examining systems with power law nonlinearities is given using a parameter …

The Impact Of A Computerized Conferencing System On Scientific Research Communities, Computerized Conferencing & Communications Center, Starr Roxanne Hiltz

Computerized Conferencing and Communications Center Reports

The author is indebted to Murray Turoff for coauthoring the sections describing the EIES system and for his suppport and encouragement for this study at all stages. Mary Anne Solimine served as a research assistant, supervising the distribution, coding and tabulations of questionnaire responses. Without her diligent efforts, the study would not have been possible. Ann Marie Rabke, Joanne Garofalo, Diane Price, Duchess Brooks, Margaret Wnorowski, Christine Naegle, Sonia Khalil, and Marion Whitescarver provided valuable assistance with coding and data entry and editing tasks. Larry Landwebber was most cooperative in providing access to the Theory Net group. Alan Leurck, Thomas …

Deposition Of Particles In Vertical Conduits Due To Electrostatic Charge, Diffusion, And Gravity, Melvin Wilbur Gelber

Dissertations

This investigation was made to determine the effect on the deposition of fine particles in a vertical channel and in a vertical tube due to the influences of electrostatic charge, diffusion, and gravity acting in the direction of flow. The flow considered was laminar, incompressible and steady.

The governing equations for the fluid phase were derived from the Navier-Stokes equation and the continuity equation while the equations for the particle phase were derived from Poisson's potential equation and the continuity equation. Since the governing equations are non-linear partial differential equations the solutions were developed using numerical methods.

The flow patterns …

Mathematical Modeling And Analytical Solutions Of Dissolved Oxygen And Biochemical Oxygen Demand Profiles Under Three-Dimensional, Unsteady-State Conditions, Uing Woong Kim

Dissertations

Mathematical models describing the temporal and spatial distribution of Dissolved Oxygen (DO) and Biochemical Oxygen Demand (BOD) for both pervious and impervious channel conditions in 3-dimensions have been constructed, and their analytical solutions were obtained. The solutions were implemented through the application of a digital computer, and their results are presented.

It has been found that there are significant differences in terms of DO and BOD distribution with respect to time and space in relatively deep and wide channels, thus necessitating the use of a 3-D, unsteady-state model.

Investigations Of Gate Turn-Off Structures, Hans Werner Becke

Dissertations

Research and Development was done on gate turn-off devices. The aim was i) to improve turn-off capability without compromise of turn-on, on-state, and useful temperature range, ii) to implement "safe" turn-off.

A) The dependence of the electrical device characteristics on cathode width for an optimized vertical structure was determined. Fall times of 100 to 200 nsec and risetimes of <400 nsec were simultaneously obtained for average current densities of 53 A/cm² @ T_j = 125°C. From spreading resistance analysis the fast t_r and t_f response is shown to be a consequence of proper Au-distribution in the active device volume.

From transient analysis it is concluded that for safe …

Statistical Averaging In Position Determination By Holography Under Turbulence Conditions, Paul Aloysius Mcgovern

Dissertations

An investigation of several, disparate phenomena is conducted with the aim of developing a novel surveying system capable of overcoming the limitations imposed by turbulence in modern surveying. This method incorporates standard holographic techniques and time domain statistical averaging of survey data.

Some pertinent characteristics of atmospheric turbulence are reviewed, and the restrictions imposed on standard surveying practices by such turbulence are identified. A model for the turbulent medium is proposed on the basis of previous work and several theoretical results are summarized and extended.

On this basis the technical characteristics of the proposed technique are developed and each step …

Correlation And Prediction Of Vapor-Liquid Equilibrium In Electrolytic Solutions, Anil Krishna Rastogi

Dissertations

Two expressions for the excess Gibbs free energy are presented which correlate and predict vapor-liquid equilibrium and the mean molal activity coefficient of an electrolyte in a ternary mixture containing water and either MeOH or EtOH. The proposed equations take into account coulombic forces between ions and the physical interaction forces between ion-solvent and solvent-solvent molecules in a solution.

Model #1 is a combination of an extended Debye and Huckel equation and the local composition of non-random two liquid (NRTL) model. A ternary mixture requires six adjustable binary parameters to predict activity coefficients. These six parameters are evaluated from three …

Separation Of Proteins Via Continuous Ph Parametric Pumping, Steve Wu

Dissertations

This dissertation covers the separation of proteins via recuperative mode pH parametric pumping. Continuous pH parametric pumping separations using the model system haemoglobin and albumin on a CM-Sepharose cation exchanger have been experimentally and theoretically investigated.

The pH parametric pumping system has a feed containing the protein mixture to be separated, introduced alternately to the top and bottom of the column. The top and bottom products are withdrawn from the apparatus during the bottom and top feed, respectively. Both equilibrium and nonequilibrium cases were considered, and theoretical results agreed with the experimental data.

Buffer concentration, flow rate, reservoir displacement, and …

Parametric Pumping With Ph And Ionic Strength : Enzyme Purification, Zikri Mostafa Ahmed

Dissertations

The work on separation and purification of proteins by parametric pumping has been restricted so far to pH parametric pumping where the difference between the iso-electric points of the components to be separated is apparent. The present work establishes the foundations for the continuous separation and purification of proteins (including enzyms) that have similar or very close iso-electric points by using the ionic strength as a driving force for the separation process. This technique has commercial advantages over batch processes.

It was found that the most promising technique for separating alkaline phosphatase consists of the following three major steps: (I) …

Separation Via Multi-Column Ph Parametric Pumping, Wei Tai Yang

Dissertations

This thesis presents the study of multi-column pH parametric pumping, a separation technique which applies the principle of parametric pumping and uses pH as control variable. Studies emphasize the mass transfer and the capability of separation by multi-column pH parametric pumping. Many operation modes of multi-column pH parapump are developed for varied objectives of separation. A Two-pH Levels Parapump is capable of enriching the product stream with solute components; a Three-pH Levels Parapump is capable of splitting components into two product streams. The separation capability of multi-column parapump is greatly superior to that of single-column parapump. As compared to cycling …

Nucleus 1981, New Jersey Institute Of Technology

Yearbooks

This is a digitized, downloadable version of the Newark College of Engineering Nucleus.

United States V. Western Europe : A Comparative Study Of Safeguarding Practice Against Hazards At The Point Of Operation In Metal Forming Systems, Jeffrey Joseph Schwalje

Theses

The problem of assuring safety for the worker at the point of operation of a metal stamping system is complex by virtue of the multiplicity of combinations possible between all conceivable dies and a press of suitable capacity.

The means of providing safeguarding prescriptions is further compounded by maintaining a viable means to enforce the safety regulations as demanded by law.

A comparative study of the approach to this problem was made between the practices in the United States with that of Great Britain, France and West Germany.

This was accomplished through the study of the available standards, codes and …

Mathematical Modeling Of Jet Bubbling Reactor, Fred Jyh-Woei Cheng

Theses

A jet bubbling reactor for flue gas desulfurization is described by a mathematical model with the concept of two-stages mass transfer with chemical reactions. The Model consists of two coupling differential equations which are solved simultaneously. The result from the theoretical model is agreeable SO₂ removal data obtained from a pilot plant reactor.

Control Of Construction Costs During Construction, David H. Foo

Theses

The construction of a major project requires a vast amount of time, money, material and human resources. Proper coordination of these elements into an array of activities is crutial to the success of the project if it is to be built on time and within budget. As technology advances, the complexity of the project increases the resources to build them remain finite, and therefore, the project manager must seek methods to improve control on the construction project.

This thesis provides an overall view of the relatively new and rapidly expanding field of cost engineering. Cost engineering may be defined as …

Direct Simple Shear Tests On Overconsolidated Anderten Clay, Maral Bedian

Theses

Determining the shear strength behaviour of a very stiff calcareous clay in the Direct-Simple Shear tests is the purpose of this thesis. The clay tested is the MLK Arderten Clay from West Germany.

For the Direct-Simple Shear tests, a trimming device was prepared to get the required size of the samples. Porous stones with nails were used to prevent the slippage of the samples.

The results of the Consolidated K_o Undrained Direct-Simple Shear tests showed that the shear strength of the clay depended largely on the condition of the samples tested. Relatively homogeneous and intact samples had shear strength …

A Purely Chemical Nitrogen Dioxide Laser, Conrado Mendoza Malalis

Theses

Purely chemical lasers promise to provide future high-power lasers for remote installations, airplanes, ships and in space without the necessity of external electric power, sources.

This study is about the design and construction of a new, gas phase purely chemical NO₂ laser, based on the reaction of NO + O₃ + NO≠₂ + O₂. The vibrationally excited NO≠₂ species at 1-40 mm Hg total pressure is the source of energy (photons) for the laser. A series of computer program calculations on the reaction kinetics and relaxational processes involved have also been made, …

The Heterogeneous Catalytic Decomposition Of Isopropyl Alcohol Over 0.5% Platinum On 4-8 Mesh Charcoal Catalyst Support, Thomas Michael Kudenchak

Theses

The heterogeneous catalytic decomposition of isopropyl alcohol vapor over 0.5% platinum on (4-8 mesh) charcoal support catalyst was studied at bench-top in a fixed-bed tubular micro-reactor of about 1 cm ID, six inches long containing one or two grams of catalyst. Reactor feed and exit gas analysis was obtained by gas chromatography.

Experimental runs aimed at determining the Arrhenius parameters and the reaction order (assuming the applicability of a simple power law model) were performed with 1 and 2 grams of catalyst at various residence times ranging from 0.24 to 2.3 seconds and temperatures of 150°, 175°, 200°, 225°, and …

Deposition Of Suspensions In A Vertical Converging Tube, Kam-Ho Chan

Theses

The deposition of suspensions in a vertical converging tube with significant gravity effects Was investigated theoretically with control volume - finite difference approach. The fluid was assumed to be incompressible and laminar. The particle density was assumed to be uniform at the inlet of the. tube. The velocity profiles for the fluid considered were (a) Uniform profile, (b) Parabolic profile. The angles of convergence studied were 0°, 5° and 7°. Effects of velocity ratio δ^*(=terminal velocity/mean flow velocity) on the rate of deposition were investigated for δ^*=0,1,10.

It was found that deposition increases with increasing angle …

The Evolution Of A Tailored Communications Structure : The Topics System, Computerized Conferencing & Communications Center, Peter Johnson-Lenz, Trudy Johnson-Lenz

Computerized Conferencing and Communications Center Reports

A computer-based human communication system should be designed for people's use, in response to their perceived needs and communications styles; no single system can meet the needs of all groups and individuals. It might seem that a general electronic mail or computerized conferencing system with a standard set of features should be able to meet most communications needs, in much the same way that the telephone system meets the needs of a wide range of users. However, there are many communications structures found in everyday life, ranging from one-to-many news broadcasts, to the many-to-many patterns of town meetings, from the …

Guide To The Topics System, Computerized Conferencing & Communications Center, Peter Johnson-Lenz, Trudy Johnson-Lenz

Computerized Conferencing and Communications Center Reports

TOPICS is a system for computer-based information exchange among a network of people who share certain areas of interest. The system supports simultaneous discussion of many topics at once by allowing members to raise brief, pointed topics/inquiries and then to enter responses to those inquiries. The responses are shared with all members who express an interest in each topic by selecting it. The system is designed to facilitate the flow of inquiries and responses without overloading members with irrelevant or uninteresting information.

Nested within the Electronic Information Exchange System (EIES), this tailored communication system written in the INTERACT programming language …

An Investigation Of The Dynamic Response Of The Activated Sludge Process, Tin-Bai Pan

Dissertations

A new mathematical model, derived from first principles of mass balance, is proposed for describing the mass transfer response of an activated sludge aeration tank in terms of a fluidized bed. The operational data to verify the proposed model were taken from an existing conventional wastewater treatment plant and a bench scale pilot plant.

The mass transfer rate, (K_dA_s), was presented by an empirical dimensionless group function as follows:

((K_dA_s)D_p/D_v) = fA_c (uD_p/ν)a ((ν/D_ν)(MLSS))^b

Or

Sh = f(A_c/A_s ) …

Osmotic And Mean Activity Coefficients Of Libr And Lic In Methanol At 25, 35, And 45 Degrees C, Peggy Tomasula

Theses

Vapor pressure depression data of LiBr and LiCl in methanol at temperatures of 25,35, and 45°C were measured in the molality range 0.1-4.4m using a static method, where the difference in vapor pressure of the electrolytic solution is compared to that of pure methanol.

Osmotic coefficients were calculated from the vapor pressure data. This data was then correlated with both the one parameter Bromley equation and the three parameter Pitzer equation. For all systems at all temperatures, the data were better correlated by the Pitzer equation than with the Bromley equation. Mean activity coefficients of the two salts at the …

Face-To-Face Vs. Computerized Conferences : A Controlled Experiment, Volume Ii: Methodological Appendices, Computerized Conferencing & Communications Center, Starr Roxanne Hiltz, Kenneth Johnson, Charles Aronovitch, Murray Turroff

Computerized Conferencing and Communications Center Reports

This is volume II of research report 12. It is comprised of the methodoligical appendices that support volume I.

Face-To-Face Vs. Computerized Conferences : A Controlled Experiment. Volume I: Findings, Computerized Conferencing & Communications Center, Starr Roxanne Hiltz, Kenneth Johnson, Charles Aronovitch, Murray Turroff

Computerized Conferencing and Communications Center Reports

This is a report on the first controlled experiment conducted as part of a four year effort to explore the feasibility and effectiveness of using the computer to structure the communication for various types of group tasks. It uses a language called INTERACT, developed as part of this grant effort, to administer all instructions and conduct a group problem solving discussion in a computer conference. The experiment compares the process and outcome of face to face vs. computer mediated group problem solving discussions.

The objectives of this experiment are the following "basic research" questions:

1. To gain quantified and detailed knowledge …

Correlation Of Thixotropic Parameters And Related Tests Of Blood From Human Subjects, Walter Fabisiak

Dissertations

The flow behavior of human blood is an important facet of the circulatory system as it affects all of the organs of the body. The rheological properties of whole blood provide a means of analyzing the flow of red cells and plasma through the microcirculation. A recently observed rheological characteristic of whole human blood is thixotropy, a time-dependent phenomenon. This phenomenon is caused mainly by the redistribution of an aggregated form of erythrocytes, known as rouleaux, and the non-aggregated, single erythrocytes. In order to further define and analyze the thixotropic properties of blood, the Huang model is used to quantitatively …

Thixotropic Properties Of Whole Human Blood, Jen An Su

Dissertations

The rheological property of whole blood from various human subjects was studied with a Weissenberg Rheogonio-meter, modified with a continuously variable speed drive. Experimental data showed a hysteresis loop in the shear stress versus the shear rate plot and a torque-decay in the shear stress versus the shearing time plot which is under a constant shear rate. The rheological equation previously developed by Huang was employed to define the thixotropic parameters of each whole blood sample based upon the recorded rheograms.

The altered thixotropic parameters for the blood from patients with open heart surgery at different clinical stages were quantitatively …

Nucleus 1980, New Jersey Institute Of Technology

Yearbooks

This is a digitized, downloadable version of the Newark College of Engineering Nucleus.