Digital Commons Network^™

Planning And Scheduling Software Programs With Pert, Henry E. Mielo

Theses

The use of the Program Evaluation and Review Technique (PERT) in planning and scheduling software programs was discussed in this thesis. A real world program, referred to as the Wrap-Around Simulation or WAS Project, was selected to illustrate that complex efforts in the software domain can respond favorably to modern planning and scheduling techniques

The WAS Project included the provision of a digital simulation of the shipboard environment in which a Digital Fire Control Computer (DFCC) would operate as part of a Digital Fire Control System. The digital simulation afforded a well controlled and conclusive checkout of the operational program …

Electrolytic Polishing Of Copper And Nickel Silver, Halle Abrams

Theses

To facilitate the study of surface conditions on ultrasonic weldability, electrolytic polishing was used to obtain four types of surfaces on copper and nickel silver (alloy D). A500 orthophosphoric acid bath was used, and the necessary operating conditions to obtain these surfaces were established. In accordance with current electrolytic polishing theory, the existence of the anode viscous layer and anode surface film was observed, and their role in the polishing process is discussed. By means of metallurgical techniques and surface profile measurements, it is shown that the four types of surfaces are significantly different, and good reproducibility of these surfaces …

Design In Clay For Architecture, Leon I. Nigrosh

Theses

None provided.

A Technique For Analyzing The Paper Fiber Accumulation On The Blanket Of A Web Offset Press, John M. Scott

Theses

None provided.

The Effect Of Turbid Water In The Optical Path Of A Photographic System On The Modulation Transfer Function Of That System, G. Fulmer, Harvey Greenberg

Theses

Various levels of a turbid suspension were introduced into a specially constructed tank and photographs of a variable transmittance sinusoidal object containing a step tablet were taken. The resulting images were processed and measured on a micro-densitometer to obtain the modulation transfer functions of the system. Results indicate that with increasing turbidity there is a speed loss, increased flare or reduced contrast, and decreasing modulation transfer functions. The increasing flare is not the only factor causing the demodulation of the underwater images.

The Effects Of Temperature, Exposure, And Development Time On Polaroid Color Film, Dale Farkas

Theses

None provided.

Feasibility Study Of Direct Electron Recording Target Systems, Gaylord A. Helgeson

Theses

Not Included

Fugacity Coefficients Of Gases In Binary Mixtures, David Albin Olson

Theses

A proposed, method of Joffe for determining fugacity coefficients of gases In binary mixtures is presented. The method is evaluated by calculating 320 pairs of fugacity coefficients and comparing the results with experimental data and with values calculated by the method of Pitzer.

Joffe derived the expression for fugacity coefficients by employing the technique of Gamson and Watson. The expression is based on the three-parameter corresponding states principle as previously presented by Pitzer and a proposed definition of the pseudocritical properties.

The method of Pitzer and the proposed method of Joffe both require the same data.

This study is based …

An Experimental Study Of The Problems At High Temperature Developments, Pravin Lalwani

Theses

Not provided.

A Study Of The Effects On Sigma D And Resolved Lines As A Function Of Spatial Multi-Superposition Of Images, Jerome Katz, Roger Umbdenstock

Theses

In photography the fidelity of the image is often degraded due to the random graininess associated with photographic emulsions. A study was performed to obtain objective and subjective data on the effects of granularity and graininess as a function of the number of spatially superpositioned images. A target was designed and built.* Individual negatives were made utilizing copy equipment with a vacuum back to ensure precise registration during exposure. These individual negatives were then imaged onto 16mm film utilizing standard motion picture equipment and a vacuum platen which was designed and built to ensure precise registration of individual negatives during …

Lighted Ceramic Garden Sculptures, John Thomas Forgey

Theses

Not Included

Density Variation And Spread Of The Printed Halftone Dot In Offset Lithography, Walter L. Covington, William L. Heaps

Theses

No detectable functional relationship was found between dot area and dot density within a solid ink density and paper combination over a 65 to 300 line screen range.

Dot spread, measured as per cent difference from the per cent dot value of the half tone negative, was found to be more significant in the midtones and the 300 line screen was observed to increase spread appreciably as well as variability with tints.

Staved Construction In Furniture, Craig Mcart

Theses

Not listed.

Fiber Glass Methods For Furniture, Donald Bjorkman

Theses

Not listed.

International Tourist Symbols, William Brown

Theses

Not provided.

Application Of Radioactive Tracers In The Study Of Diffusional Phenomena, Rodolfo Cilento

Theses

The study of mass transfer of a solute through a solvent can be greatly facilitated by the use of radioactive tracers.

This experiment was developed to demonstrate that by using radioactive tracers very small quantities of matter that would be very difficult to test chemically, can not only be tested but easily followed without disturbing the apparatus in which the diffusion is taking place.

Oleic Acid tagged with radioactive iodine (I¹³¹) was diffused through hexane at constant temperature in a glass column, one inch in diameter and thirty-six inches long.

The diffusion of Oleic Acid was followed by …

Thermodynamic Properties Of Perfluoropropane, Frank Fang

Theses

The thermodynamic properties of perfluoropropane (octafluoropropane) have been determined by the author for the saturated region from -100°C to the critical temperature, 71°C. Properties in the superheated region were likewise determined by the author for temperatures from -35°C to 300°C and over a pressure range from 1 atmosphere to 40 atmospheres. Enthalpies, entropies, densities, and specific volumes are reported for both vapor and liquid phases where applicable. The datum point used in these calculations is based on a zero value for vapor enthalpy and vapor entropy at -100°C and 0.0183 atmospheres.

Constants used in the Benedict-Webb-Rubin equation of state were …

Esterification Of Oleic Acid, Niranjan Muljibhai Patel

Theses

The purpose of this paper is to determine the effects of catalyst concentrations and temperatures on the rate of reaction and energy of activation in the reaction system of oleic acid and oleyl alcohol. It is suggested by Flory^2,3 that the p-toluene-sulfonic acid catalyzed esterification reactions follow a second order mechanism. The p-toluene-sulfonic acid is used in the present work.

Two different catalyst concentrations were used at two different temperatures. The uncatalyzed reaction at the same temperatures was also studied. The specific rate constants are calculated and from that, the energy of activations are calculated using the Arrhenius equation. …

Interphase Gas-Liquid Mass Transfer Study In A Horizontal Channel, Bruce R. Marx

Theses

The rate of transfer of hydrogen sulfide and of carbon dioxide from an atmosphere of the gas saturated with water to a flowing stream of water in a horizontal channel was investigated over a range of water flow velocities and absolute pressures.

Mathematical models describing the system in terms of the penetration and boundary layer theories were inadequate when used to calculate the diffusivity of each gas in water at various conditions. The results of the hydrogen sulfide-water system study shows a relationship between the diffusivity, the interfacial concentration and the liquid flow rate. The calculated diffusivity of the carbon …

Decomposition Of Diacetone Alcohol In Packed Beds Of Ion Exchange Resins, Arthur Donald Lahr, Rafael Juan Puente-Duany

Theses

A study was made of the rate of decomposition of diacetone alcohol by anion exchange resins in a packed bed under adiabatic and isothermal conditions. Two different resins were compared: a conventional type gel structure resin, Amberlite IRA-400, and a newly marketed maorore-ticular resin, Amberlyst A-26.

In a substrate with low water content, the rate of decomposition of diacetone alcohol by Amberlite IRA-400 vas controlled by intraparticle diffusion. This vas due to shrinkage of the polymer chain matrix of the resin. When dry diacetone alcohol feed was introduced the amount of decomposition was not measurable.

It was found that the …

Effect Of Temperature On Rate Of Absorption Of Ammonia By Water In Packed Tower, Chhotu B. Patel

Theses

Measurements of the rate of absorption of ammonia in water have been made using a 4-inch diameter Lucite column With porcelain Raschig rings packed to a height of 3 feet, Tests were made with water rates of 462 and 695 lbs./ hr-ft² and a constant gas rate of 130 lbs/hr-ft² with liquid temperature verying from 72° F. to 110° F.

At constant liquid and gas rate, the mass transfer coefficient, Κ_Ga, decreases with increasing liquid temperature and in represented by straight lines on plot of Κ_Ga versus temperature. The variation of Κ_Ga …

Gas Phase Fugacity Coefficients, Harvey Joel Klee

Theses

A method is presented for calculation of fugacity coefficients in gas mixtures. This work is based on a recent paper by Leland, Gamson, and Chappelear, wherein they presented a new method for evaluation of ideal K values. The information required for the method presented here includes pure component physical properties, and generalized tables or equations for compressibility factors, fugacity coefficients, and real gas enthalpy departure terms. Pseudo-critical temperatures and pressures for the mixture are calculated using the expressions presented by Leland and Mueller.

Five different binary systems consisting of paraffin hydro-carbon and CO₂ mixtures containing 318 separate points were …

An Oxidation Of Para-Nitrotoluene, Albert Edward Meisinger

Theses

The original purpose of this paper was to investigate the reaction kinetics of the air oxidation of para-nitro-toluene (PNT) to para-nitrobenzoic acid (PNBA). The reaction was to be carried out at atmospheric pressure and at temperatures between 100 and 175° C, and in the presence of an oxidation catalyst. However the main problem became one of trying to find a catalyst that would work at these conditions. The catalysts used were nickel acetate, cobaltous acetate, manganous acetate and manganese naphthenate. Hydrogen peroxide was tried as an accelerator for the reaction. None of these worked since no yield greater than 0.01% …

Diffusion Of Single And Multicomponent Solutes From Capillaries, Oleh S. Sklepkowycz

Theses

The purpose of this investigation was to determine the diffusion coefficients of several single and multi-component solutes, and to establish the relations between the diffusivity, the solute composition) and the diffusion rate. Such information pertinent to the extraction and leaching operations, can not be found in literature.

The procedure developed by Piret, Wbel, and Armstrong (25), involving observation of the extraction rate of two-phase mixtures from straight capillaries, was adopted and verified on a known sodium chloride-water system.

In the course of the experimental work diffusion coefficients more determined for ursolic acid, palmitic acid, and tripalmitin in methyl isobutyl ketone. …

The Reaction Of Urea With Primary Alkyl Bromides, Ronald Lewis Stabile

Theses

The reactions between urea and the primary alkyl bromides from 1-bromobutane to 1-bromooctane were investigated. The effect of concentration, temperature, and solvents on the yield was determined. Second order reaction rate constants at temperature of 80°, 100°, and 132°C were calculated from the data for yield. The yield is defined as the percent of bromine from the alkyl bromide titrated as bromide ion.

The results indicate that the reactions of the primary alkyl bromides with urea are similar; the reaction being of the second order and the ex. tent of reaction being approximately the same for each alkyl bromide for …

Amination Of Alkyl Halides, Frank Joseph Stulb

Theses

The possibility of aminating alkyl halides with urea was the prime interest of the research undertaken in this thesis. Alkyl halides and urea react only to a slight degree. However the reaction is rapid when dimethylformamide is used as a solvent.

In working with compounds containing halogen on the aromatic ring we always found the halogen to be replaced by the amino group. With alkyl halides, however, this was not so. In the case of the reaction between an alkyl halide and urea in a solvent, a compound of composition close to that of a di-alkylurea was isolated and the …

Mass Transfer Into Cylindrical Liquid Films Measurement Of Liquid Diffusivities, Ronald Francis Lovenguth

Theses

This thesis was undertaken to augment and validate the previous work of Ratcliff and Reid⁽⁷⁾ in the area of diffusion of immiscible liquids. Their novel approach to this particular problem of liquid diffusion led the author to consider an experimental technique that has been used in gas-liquid studies. A short vetted-wall column was used to determine the rate of mass transfer of benzene and toluene into thin cylindrical films of water. A general analytical solution for the rate of mass transfer has been derived and is given below. This solution was checked using the system benzene-water.

G=3.63(Π(ρ_ω-ρ …

Polypropylene Fibers, Anthony Vincent Galanti

Theses

One of the latest members of the rapidly growing therrnoplastic polymer family which appears capable of successfully competing with the currently saturated textile and chemical markets is polypropylene fiber. The objectives of this Thesis were to: (1) examine the effects of polymer characteristics and fiber processing conditions on the properties of polypropylene fibers, and (2) correlate all existing information on the physical, chemical, and mechanical properties of polypropylene fibers and comparatively evaluate this material with other fibers, natural and synthetic.

Polypropylene is the first member of a new group of polymers prepared by a mechanism defined as "stereospecific" polymerization. From …

Thermal Conductivity Of Solid Materials, Irwin N. Huppert

Theses

A literature search on the methods of determining the thermal conductivity of solids has been made.

A compilation of the various methods of determining the thermal conductivity of solids presented in the literature is given in the report. In general, the literature is lacking in correlations of thermal conductivity with other properties of solid materials. A review of the correlations found is presented. A summary of data presented in the literature is presented in the text.

A method of determining the thermal conductivity of solid materials without measuring the heat flow through the test specimen is presented. The use of …

The Virial Equation Of State Based On Critical Constants, Ghanshyam R. Patel

Theses

Results obtained from the Epstein equation of state¹⁵ i.e. equation (8), which is theoretically valid up to the critical density, are compared with the experimental values of the compressibility factor. The calculated values of compressibility factor or ethylene, ethane, propane, and n-butane were obtained using two methods of evaluation for the second and third virial coefficients. In addition, using these two methods and excluding fourth, fifth, and sixth virials in the Epstein equation of state, compressibility factors were calculated for all the four compounds to test the effect of higher virial terms. In the proposed method-(A) and method-(C), the …