Digital Commons Network^™

A Study Of The Kinetics Of "Lith" Development, David Turbide, Michael Williams

Theses

A kinetic infrared scanning densitometer was used to study lithographic development in real-time. The instrument proved very effective after several slight improvements to increase sensitivity and obtain Density vs Time of Development curves directly- It was noted that this apparatus could also be used lot a study of the penetration of solutions into an emulsion. An exposure series on a normal Kodalith system indicates a decrease in induction time and an increase in maximum rate (up to diffusion limit) with increasing exposure. A series of sulfite concentrations shows that the lith effect becomes detectable only below a sulfite concentration of …

Pulse-Width-Modulation Control For Second Order Plants Via A Quadratic Criterion, Charles Gebo

Theses

This paper presents a mathematical study of the control of a second order plant having real distinct roots by use of pulse -width-modulation. An integrator connected between the pulse-width-modulator and the plant is a fixed element of the control loop. The integral-square error is used as the Index of performance. The ISE is minimized with the constraint that the pulse modulator is limited to a maximum of one output reversal for a step change in input. Derivation of the equation which will predict the exact switching time of the modulator output to minimize the performance index for any step amplitude …

Continuous Interfacial Polycondensation Of Nylon 6-6, Chandrakant A. Patel

Theses

Nylon 6-6 has been prepared by continuous interfacial polycondensation from hexamethylene diamine and adipyl chloride in a stirred system. The effect of monomer concentration and stirring on the intrinsic viscosity of polyamide 6-6 solution in formic acid (90%) was determined.

As stirring rate and monomer ratio increased, the intrinsic viscosity and polymer yield went through a maximum. Diffusion coefficient (D_AB) for hexamethylene diamine was calculated and from that J_D and mass transfer coefficient /D_AB were calculated. A relation between Reynolds number and J_D factor was established by correlation curve.

A Study Of Latent Image Formation In Photographic Emulsions Subjected To A Combination Of High And Low Intensity Exposures, George Macmanus

Theses

None provided.

A Simple Method For Liquid Enthalpy Departure Calculations, Ching-Lin Chien

Theses

The reduced equation of state for gases and liquids developed by Benson and Golding in 1951 is modified and used to calculate liquid enthalpy departures for saturated pure substances and mixtures. The temperature-independent coefficients in the modified equation are determined from critical properties and experimental liquid enthalpies at the boiling point and at the critical point. The results of the proposed method are compared with those predicted with the modified Redlich-Kwong equation of state by Joffe and Zudkevitch.

Agitation Of Dilatant Fluids, Vijay Jang Datta

Theses

No abstract provided.

A Study Of Zoomorphic Abstractions With Raku Sculpture, Andrew Krouse

Theses

None provided.

Black Faces And Their Emotions, Margaret Anderson

Theses

None provided.

Analysis Of Color Errors And Their Sources In A Commercial Color Reproduction Process, Sakda Siriphan

Theses

To analyze color errors and their sources in the color reproduction process, the reproduction is visually evaluated and compared visually with the original scene color scales and also with the original transparency viewed on a variable brightness illuminator (D5000) with an opaque reflective white surround. Graphs (press plate curves, single color proofs and END of single color proofs) have been added to the Kodak tone-reproduction diagram (1960) to obtain more complete steps in the analysis of the tone-reproduction and the color balance. The GATF Evaluation Method of Ink Color is tested and the GARC colorimetric system, which is a modified …

A Simulation Model Capable Of Performing The Calculations Involved In Defining A Crude Preheat Train, Robert G. Parker

Theses

A simulation model has been developed for a system of ex changers to preheat the feed to a crude distillation unit. In conjunction, a Fortran program for the performance of the model calculations by digital computer was written. Two types of preheat system were simulated, a single train system and a split (or parallel) train system. A number of features were included in the program for flexibility and versatility. A particular effort was made to have the model represent as economical a preheat system as possible.

The model program was used to obtain computer-calculated results for both single-train and split-train …

Incineration Of Solid/Liquid Human Waste, Theodore Joseph Wayne

Theses

This thesis encompasses the design criteria required to produce an effective incineration system for the disposal of solid/liquid human waste. Coupled with the overall design parameters is an investigation of the chemical decomposition of the waste during the incineration process, odor treatment and control, and the physiological effects on the human body due to the inhalation of the toxic gases given off during the combustion of human waste.

The variables involved in the combustion process are studied and equations presented that relate the combustion variables of flame temperature, residence time and air requirements. These equations are tested based upon published …

Prediction Of The Physical Properties Of Pure Gases And Liquids, James L. Filson

Theses

A computer programmed system for the estimation of physical properties of pure compounds from minimum data input on compound type and structure was developed for both gas and liquid phase conditions.

The properties of the gas phase which can be obtained include:

• gas volume
• compressibility
• normal boiling point
• volume at the normal boiling point
• critical temperature, pressure, volume compressibility
• vapor pressure
• Riedel factor
• acentric factor
• ideal heat capacity
• heat capacity at constant pressure
• heat capacity at constant volume
• dipole moment
• intermolecular distance
• hard sphere volume
• viscosity at low pressure
• viscosity at elevated pressure
• thermal conductivity at low pressure
• thermal conductivity …

Computer Model For Reactor Design Of An Ethane Cracking Unit, Derek J. Lough

Theses

The purpose of this thesis is to develop a Fortran [sic] Computer Program to model the radiation section of a pyrolysis tube reactor designed for cracking 100 percent ethane feed. The model calculates the length of the tubular reactor required to obtain a specified ethane conversion or the ethane conversion for a specified reactor length. The resulting solution yields a conversion profile, a temperature profile, and the reactor residence time as a function of tube length. From this data it can be determined if the design is adequate and lies within the reactor model's constraints.

The Patient As Object, Mitchell Payne

Theses

None provided.

Teilhard De Chardin's Mass On The World, Mary Stover

Theses

None provided.

Effects Of Packing And Changes Of Squeeze Pressure On Image Sharpness When Printing With Compressible And Noncompressible Blankets, Walter Twarosch

Theses

None provided.

Comparison Of The Development Characteristics Of A Sodium Thiosulfate Monobath With That Of A Mercaptoacetic Acid Monobath, Richard Smith

Theses

The development characteristics of mercaptoacetic acid monobaths were compared with those of sodium thiosulfate monobaths at varying fixing-agent concentrations. The following differences were noted: (1) it required four times more moles-per-liter of sodium thiosulfate than metcaptoacetic acid to obtain the same rate of fixation; (2) the mercaptoacetic acid monobath produced less silver than the sodium thiosulfate; (3) KODAK Panatomic-X Film developed in a mercaptoacetic acid monobath had a covering power greater than or equal to that produced by development in the same phenidone-hydroquinone developer without any fixing agent, whereas the covering power of the sodium thiosulfate monobath was less; (4) …

Tone Reproduction Of Small-Scale Images Using Lithographic Film Under Infectious And Noninfectious Developmental Conditions, Julian Lopez

Theses

The tone reproduction curve of small-scale images on KODALITH film developed with KODALITH Super Developer were obtained by microdensitometry using a sinusoidal target of 64 percent modulation as a sensitometric tablet to produce images at spatial frequencies corresponding to screen rulings of 9 to 375 lines/inch. A similar series of exposures was processed with addition of sulfite to the developer to give essentially noninfectious development. Speed and contrast with KODALITH developer increased with spatial frequency; speed increased continuously by a small factor and contrast passed through a maximum (80 percent greater than for large area image) at a spatial frequency …

Design Of A Tactile Vocoder, Roger Carr

Theses

A tactile vocoder is designed for the feedback of acoustic cues for detection by the sense of touch. Design objectives based on speech signal properties are generated. An existing spectrum channel vocoder is the starting point of the design. The follow-on modulation stage after the filter channels of the spectrum channel vocoder is built up in a breadboard model and tested. The transfer function of the modulation stage has an input dynamic range of 68 decibels, being linear over 38 decibels of this range. The complete breadboard model using one of the filter channels has an input dynamic range of …

Computer Application Of Historical Data, Raymond Wright

Theses

None provided.

An Audio Oscillator Triggering Circuit For The Eg&G 501 High Speed Stroboscope; With Integrated Digital Timing, Boisey Collins

Theses

A timing generator was designed and built for an EG&G 501 High Speed Stroboscope. The generator delivers a burst of one, two, four or eight pulses at a selected repetition rate from .5HZ to 20KHZ; upon initiation by a start signal. An Unijunction Transistor ( UJT ) oscillator provides the basic repetition rate and Integrated Circuit ( IC ) Digital Logic is used to count and gate the output pulses. The circuit diagrams and construction details are given.

An Investigation Of The Aesthetic Quality Of Gloss As Produced By Overprint Varnishing, John Bechtel

Theses

The undertaking of this investigation was to question the aesthetic significance of overprint varnish. To do this a statistical investigation was developed to answer the question: "When the protection factor of overprint varnishing is of little or no significance, does overprint varnishing of the finished product add an element of aesthetic quality sufficient to justify the outlay of additional funds?" The philosophy of the investigation revolved around the investigative sample distinguishing the overprint varnishing process as a significant aesthestic enhancement process. To do this a sample of 15 sets of magazine quality reproductions, all printed under the same conditions, were …

Design Considerations For A Recording Instrument To Be Used In Conjunction With R.I.T.'S Radio Astronomy System, Robert D. Harned

Theses

Recording of radio emission from the sun can adequately be accomplished using a magnetic tape system. Magnetic tape's advantages over other recording systems include higher information capacity, low cost, and ease of operation.

Modifications of the tape deck include the recording motor speed controlled by a SCR circuit, a suitable filtering device for the SCR, and an external fan for cooling the circuit and motor.

Careful consideration has been given to the frequency response and signal-to-noise ratio as it affects the accuracy of the recording.

Alkylation And Arylalkylation Of Hydrazones, Ann Bayley

Theses

In order to increase the organic solvent solubility of aryl-hydrazones, N-alkylation was attempted. The substrates acetaldehyde 2,46-trinitrophenylhydrazone (acetaldehyde TNP) and acetone 2,46-trinitrophenylhydrazone (acetone TNP) were prepared and characterized. Alkylation attempts were made with reagents and conditions the same as those successful in alkylating acetone 2,4-dinitrophenylhydrazone (acetone DNP). Attempts were made with differing alkylating reagents, equivalence ratios, times and temperatures. Alkylating procedes via the anion of the substrate. The anions of the substrate were prepared and characterized via uv and nmr. Altered structure of the anion relative to the hydrazone lead to its chemical stability and appeared to preclude its alkylation. …

A New Technique For Steady State And Transient Analyses Of Incompressible Flow Networks, George V. Catanzaro

Theses

A new technique for the calculation of the transient or the steady-state mass flow rate and pressure distribution in incompressible flow networks is presented. Employing the matrix method of network analysis, the nodal continuity and branch momentum equations are solved simultaneously to obtain explicit relations giving the unknown nodal pressures and branch mass flow rates. In this manner, the transient or the steady-state behavior of incompressible flow networks with arbitrary configuration having nodal sources and sinks as well as branch transducers can be determined. In contrast with the conventional steady-state network analysis methods, the new technique can be extended to …

Stability Analysis Of A Continuous Stirred Tank Reactor With An Autocatalytic Reaction, David Elliot Rosenberg

Theses

The basic principles of stability analysis are set forth, including the development of a mathematical model, steady state analysis, integration of the dynamic system equations, and predictions of transient responses. The equations for the mathematical model are developed for a continuous stirred tank reactor with a cooling jacket, containing an autocatalytic reaction, in unsteady state operation. These equations are numerically integrated to obtain a good picture of reactor dynamics about the steady state. State variable methods, including the classical linearization theorems and Lyapunov's Second Method, are utilized to predict bounds of stable reactor behavior. A discussion of the shortcomings of …

A Study Of Heat Transfer And Inlet Flow Behavior In Molten Polymer Systems, Min Ho Choi

Theses

Two separate studies have been done in the present work: one to study the entrance effects in flow in molten polymer systems and the other to investigate the heat transfer to thermally softened flowing polymer.

The equipment for the entrance effect was designed to study the isothermal flow behavior of a polymer melt in the entrance region. The main object of this investigation was to find the entrance length for the melt to relax and to separate the pressure drop into viscous and elastic effect. Due to the failure in developing a proper pressure measuring device the experiment was not …

The Reaction Of O-Propylphenyl Azide With Di-N-Propylamine, Seyed Ziaeddin Razavi

Theses

Nitration of n-propylbenzene resulted in O-nitro-n-propylbenzene. Reduction of this compound gave o-n-Propylphenyl azide was prepared by diazotization of o-n-propylaniline followed by treatment with sodium azide.

Photolysis of o-n-propylphenyl azide in di-n-propyl-amine yielded two new azepines, 2-di-n-propylamino-3n-propyl-3H azepine and 2-di-n-propylamino-7-n-propy1-7H-azepine. Their structures were assigned on the basis of their physical properties (i.e. I.R., U.V., N.M.R., N.S. and elemental analysis).

Photolysis of the azide at room temperature gave 26.9% o-n-propylaniline and 4.3% 2-di-n-propylamino-3-n-propy1-3H azepine, but when the photolysis was carried out in the presence of the triplet photosensitizer (xanthen-9-one) the yield of o-n-propylaniline was increased to 34.6% and the yield of 2-di-n-propylamino-3n-propy1-3H-azepine …

The Shoreline, Yosaif Cohain

Theses

None provided.

Variations In Functional Relationships Between Amplitude And Phase Images, Gilbert Tunney

Theses

The objective of this research is to study the functional relationship between amplitude and phase images, using a sinusoidal test function. Amplitude and phase sine wave gratings were produced and scanned. It was found that the phase image closely reproduces the amplitude image for low spatial frequencies, but the accuracy of reproduction falls off at high spatial frequencies.