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The Measurement Of Dispersion Coefficients, John Harold Rosenberger

Theses

This work describes a method of determining axial dispersion coefficients in a packed bed chemical reactor. This is done by measurement of the fractional conversion of acetic anhydride to acetic acid, by first order reaction in dilute solution. The reaction is carried out at various flow rates in a four inch diameter reactor packed with one-half inch Raschig rings. analysis is by the aniline-rater method. Calculation of the dispersion coefficients is by trial using a digital computer. The results are presented graphically and compared to results obtained by other methods. The results of this study are found to correspond to …

Designing More Aesthetic Movie Promotional Material, David Crothers

Theses

None provided.

The Aesthetic Of The Computer, Richard Lefevre

Theses

None provided.

Psychometric Evaluation Of Diazo Reproductions, John A. Kosta

Theses

An experiment was conducted to determine quality criteria for continuous-tone diazo film reproductions. The rank-order method was used to acquire judgement data from a group of experienced photographic scientists evaluating diazo reproductions varying in exposure level and tone reproduction contrast. Analysis of the data resulted in the conclusion that a high degree of agreement does exist between the judges, the quality of a diazo copy depends significantly on the exposure level and the silver positive input, and maximum density and tone reproduction contrast could be possible quality criteria for diazo reproductions.

A Latent Image Distribution Study Of "Dry-Writing" Photo-Recording Materials, Joseph Geller

Theses

Improving silver halide emulsions used for the direct writing of oscillographic traces is a topic not discussed openly in the technical literature. It has been previously thought that good contrast between image and background depends upon the extreme low-intensity reciprocity law failure of these emulsions combined with their ability to be desensitized by low-intensity light. Evidence presented in this report indicates that low-intensity reciprocity law failure is very desirable for the surface image; however, for the internal image, the most practical* of the three materials tested reveals no reciprocity law failure within the time interval from IO*2 to 10*6 seconds …

Changing The Contrast Of Ektacolor Paper, Britton Hopkin

Theses

Practical effects (contrast, fog, maximum density, and scale index) on the characteristic curves of Ektacolor paper were found for variations in the concentrations of sodium carbonate, potassium bromide, 6-nitrobenzimidazole nitrate (Kodak AF-71), color developing agent (Kodak CD-3), pH, and citrazinic acid (CZA) in an Ektacolor developer used on the Kodak model 11 drum processor. The effects of pH, citrazinic acid, potassium bromide were found to be significant while the effects 6-nitro benzimidazol nitrate and CD-3 were significant only in isolated insidences.

A Method Of Calibrating A Photo Optical System For Determining Spatial Relationships, E. Glab, D. Zimmerman

Theses

A technique is described for the calibration of a photo-optical system. This technique yields a response surface. Measurements of image density and image width taken from a microdensitometer trace can be related through this response surface to object dimensions.

Color Monobath Development, John Plumadore

Theses

Not included.

Ph Effects On Fluorescent Fatigue, Donald Miraco, John Pierce

Theses

Fluorescent dyes tend to fatigue when exposed to short wavelength radiation. Since all work is not done at one pH level, it is necessary to know how a change in pH will effect the fluorescing characteristics of a dye. Of particular interest is the effect on fatigue as a function of time. The shift in spectral absorption with varying pH was established for fluorescein dye. Its increase in fluorescing intensity with increasing negative ion concentration was then measured. With increasing exposure time the pH's of 6.0, 8.0, and 10.0 gave indications of fatiguing while the pH's of 2.0 and 4.0 …

Post Exposure Latensification Of A Multilayer Color Film, Thomas A. Tietjen

Theses

A uniform secondary exposure of low intensity is made to a normal or underexposed primary latent image for approximately 5-15 minutes, to increase the effective speed index. This is first studied from a white light approach similar to that used in single emulsion negative materials.

In addition, the ability to manipulate and align individual layers by selective filtering was also studied. Red, green and blue filters, matched closely to the spectral sensitivity of each layer, were used separately and conjunctively towards achievement of the desired levels of effective speed, contrast, color balance and maximum density.

Latensification by a secondary white …

Exploration Of A Corporate Image: "In The Visual Perspective", H. Clapsaddle

Theses

None provided.

Vapor-Liquid Equilibria System : Chloroform, Carbon Tetrachloride, Isopropanol, Barnet H. Bursack

Theses

A study was made of the vapor-liquid equilibria of the ternary system: Chloroform (CHCl₃), Carbon Tetra-chloride (CCl₄) and Isopropanol (C₃H₈O). An Othmer still was used for the equilibria determination. Refractive index and density measurements were used to determine liquid and vapor compositions. A comparison between experimental and theoretical values was made using the Margules 3-suffix ternary equations for the correlation.

It was necessary to investigate the vapor-liquid equilibria of each of the three binary systems to evaluate the techniques and equipment used and obtain new data. Only one previous investigation of the …

Incunabula 1966, Leroy Robert Wilce

Theses

None provided.

Nature, Man And The Young Reader, Jane Miller

Theses

None provided.

Latent Image Stability In High Resolution Plates, Robert Mottice

Theses

A study of the stability of the latent image in High Resolution Plates is presented. Two factors have been investigated- relative humidity before and after exposure and the length of time under such conditions. It was found that in conditions of 60% relative humidity or less, fading does not pose any real threat to the commercial user and that under 100% R.H. conditions fading takes place quite rapidly.

The Effect Of Negative And Positive Granularity On The Final Print Granularity, W. Norman Pierce, Avron Hecht

Theses

Theoretically, the relation of negative and positive rms granularity to the final print granularity is described by the following equation: σ(D)print=[ σ(D)2negative material+ σ(D)2positive material]1/2. Using fine, medium and coarse grained positive and negative materials in a variety of printing situations, the validity of the above equation was tested. Results of this investigation indicated that the hypothesized equation does not hold for a variety of printing situations.

A Colorimetric Determination Of The Decay In An Observer's Color Sensation Due To Adaptation, Gary Zeff

Theses

When the eye gazes at a colored stimulus over a certain length of time, it becomes fatigued and perceives the stimulus differently after it has adapted to it than when it first viewed it. An instrument has been designed, built, and tested and the results indicate that there is a significant difference between the fatigued eye and the fresh eye and that this difference can be expressed in colorimetric terms.

Flat Unmodeled Form In Painting, Peter Schwartzott

Theses

None provided.

The Effect Of Development Time, Temperature, And Sulfite Content On The Acutance Of A Photographic Emulsion, Jeffrey Waltzer

Theses

Acutance of Plus-X film was examined as a function of development time, temperature, and sulfite content. Five levels of each factor were used with equal increments respectively. Method of printing knife-edge targets and noting the extent of edge-effects was also sought for. Acutance was found to increase with increasing development time and temperature but decreased when the sulfite content of the developer exceeded the recommended amount.

Two-Dimensional Shapes In Space, Leroy White

Theses

None provided.

Investigation Of The Octene-Decane-Urea Adduct Equilibrium System, Frederick Charles Guest

Theses

Concentrations of equilibrium mixtures formed by adding increments of octene to a solution of urea in methanol to form adduct are reported.

Calorimetric studies indicate that the addition of octene to a urea-methanol solution shows an endothermic heat effect prior to the formation of solid adduct. The heat effect becomes exothermic as solid adduct is formed.

Addition of decane to an equilibrium octene-urea adduct system increased octene concentration in the supernatent liquid, indicating an octene release from the original adduct as decane adduct was formed.

The order in which decane and octene were added to form the decane-octene-urea adduct system …

Cation Exchange Between Solutions Of Ferric Nitrate And Dowex 50x-8 Resin, Michael H. Mansky

Theses

The rate of exchange of ferric ions from solutions of ferric nitrate and hydrogen ions from Dowex 50X-8 has been studied in an agitated bed ion exchange column over a range of bed loading conditions. Agitation has been maintained in a regime known to indicate film diffusion control of rate in small scale batch reactors.

Calculated diffusion coefficients for the column are slightly higher than those determined in the batch reactor because of greater turbulence of agitation in the column.

The assumption of previous investigators concerning linearity of equilibrium data has been found to be invalid for the system studied. …

The Thermal Conductivity With Vapor Pressure For N-Paraffin Hydrocarbons, Jacob Tolsma

Theses

A literature search of the thermal conductivity of pure liquids has been made and experimental values have been compiled. Study of the theory of the thermal conductivity of liquids indicated that a relationship exists between thermal conductivity and viscosity. Previous investigations have found an almost linear relationship between the logarithms of viscosity and vapor pressure for n-paraffin hydrocarbons. In this investigation the logarithm of thermal conductivity plotted versus the logarithm of vapor pressure for the same series was also found to be almost linear. The equation of the line when combined with a linearized Antoine equation in terms of the …

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 …

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

Theses

Not Included

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

Theses

Not provided.

Staved Construction In Furniture, Craig Mcart

Theses

Not listed.

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.

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 …

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 …