Digital Commons Network^™

Recognition Thresholds For The Spectrally Opponent Neural Network In The Human Visual System, Douglas Smith

Theses

Recognition thresholds for an alphanumeric resolution test object of differing target/background chromaticities and equal luminosities were determined. Combinations of the four psychologically unique hues were studied, and those pairs corresponding to the green-red and yellow-blue opponent neural systems were found to give the highest visibilities. Equivalent achromatic contrasts for each of the presented color pairs were determined, and comparison of the results with achromatic data of other researchers shows clearly that the spectrally opponent neural network in the human visual system is much less efficient in processing spatial information than is the spatially opponent (achromatic) neural network.

An Experimental Study Of Semi-Continuous Ph-Parametric Pumping With A Center Feed, John S. Dell'osso

Theses

Parametric pumping represents a new development in separation science. It has attracted considerable attention both because of its novelty and because it permits continuous operation in small equipment with very high separation factors. The basic principle of parametric pumping is to utilize the coupling of periodic changes in equilibrium conditions caused by periodic changes in some intensive variables (temperature, pH, electric field, etc.), and periodic changes in flow direction to separate the components of fluid which flows past a solid adsorbent. Applications of parametric pumping involving the separation of valuable materials such as proteins would be very attractive and profitable …

A Comparison Of The Patterns Formed By Primary Textile Structures And Their Photographic Abstraction, Pamela Perlman

Theses

Not Included

Group Treatment Of Anorgasmia, Mona Lavine

Theses

Unavailable.

The Creative Kit: A Portfolio Of Graphic Imagery To Introduce The Graphitek 430 Camera/Processor System To The Visual Communications Market, Barry Hincks

Theses

None provided.

An Investigation Of Solid Ink Density Variation As Determined By The Acceptability Of Overprints In Process Color Printing, John G. Gaston Iii

Theses

In order to establish limits which are representative of the allowable variation in solid ink density (SID) of the single process colors, as determined by the allowable variability of their overprints, a study was conducted utilizing fourteen (14) experienced color observers selected from printing companies in the Greater Rochester area. Printed color patches, at the 70% tint level of cyan, magenta, yellow, red (M+Y) , green (Y+C) , blue (M+C) and three-color overprints (Y+M+C) , were shown to observers, individually. In each group, the observer was asked to accept or reject the patch when compared to the reference standard in …

Solution Of The Transonic Potential Flow Equation By Finite Differences For The Hydraulic Analogy, Ewan Choroszylow

Theses

A numerical procedure is presented for the solution of the transonic potential flow equation around an isolated airfoil, for the hydraulic analogy. The numerical method used was the finite difference method, appropriately modified for a mixed elliptichyperbolic system of equations. Potential flow analysis was used, since for all practical purposes, the flow is inviscid throughout the flow field, except for wake regions and boundaries. The mixed finite difference scheme has proven to be an effective technique in the solution of elliptic and hyperbolic flow problems. For conditions near the wave propagation velocity (sonic velocity), difficulties have arisen in proper solution …

An Analysis Of A Confluent Approach To Teaching English Composition, Beverly J. Bimes

Theses

Not available.

The Development And Utilization Of A Radio Station In The Secondary School, Daniel P. Bretch

Theses

Not available.

Discover Town Centers: Educational Urban Information, Jeffrey Huff

Theses

None provided.

An Evaluation Of The Primary Factors Which Influence Proportionality Failure, Daniel Levine

Theses

If practical colorants could be found to meet theoretical requirements then there would be no need for color correction in multi-color printing. Color correction is necessary because the available yellow, magenta, and cyan inks absorb and transmit in all parts of the visible spectrum. It is possible to measure how much these colorants deviate from the ideal with the use of a reflection densitometer. The red, green, and blue filter positions on a densitometer will read the cyan, magenta, and yellow densities respectively. From these densities the amount of color correction necessary to compensate for the inks deficiencies is expressed …

The Pre-Setting Of The Ink Distribution Keys Of A Small Sheet-Fed Offset Press, Bruce May

Theses

The problem is to devise a system of pre-setting the ink keys of a sheet-fed offset press in order to save make-ready time. A preliminary experiment is run to establish and identify the correlation between the information obtained from visually scanning the plates and the ink key dial settings. The test involves a control group and a test group making press runs to see if pre-setting the ink keys can save time. The results show that such an idea is possible. The preliminary experiment establishes a positive correlation between the two variables and test group press-run times are significantly less …

A Study To Assess The Aesthetic And Economic Viability Of Producing Original Fine Art Prints And Autographic Artists Books On A Rotary Offset Press, And An Introduction To A New Medium For Creating And Producing Original Fine Art Prints And Autographic Artists Books, Daniel Richard Tucker

Theses

This study investigates factors which the author believes could contribute to the determination of the aesthetic and economic viability of producing original fine art prints and artists books on a rotary offset press using direct imaged, uncoated lithographic plates. It also introduces a new medium for the creation and production of these works which was developed during this study. This investigation has been accomplished in the following ways: First, answers were sought to ten questions the author believed any artist considering the use of a rotary offset press as a means of producing these works would want to know. The …

A Quantitative Method Of Pre-Setting The Ink Distribution Keys Of An Offset Duplicator Using A Photoelectric Estimating Unit, Martin Marino

Theses

The purpose of this study was to study the feasibility of quantitatively pre-setting the ink key distribution on an off-set press. Presently the pre-settings of the ink keys has been left to the pressmens' ability and experience. This, in many cases, involves much "trial and error" work along with lengthy makeready times. This study attempted to reduce makeready time by quantitatively pre-setting ink keys from data obtained from an estimating unit and use of a set of calibration curves. A photoelectric estimating unit was designed and constructed to read integrated densities of copy to be printed. There was one reading …

An Investigation Into The Emulsification And Determination Of Water In Lithographic Ink Emulsions, Thomas Saczawa

Theses

A study of the emulsification process of lithographic ink and water was conducted to investigate methods for determining the water content of lithographic ink and water emulsions. Experiments using infra-red spectroscopy and analysis of the hydroxyl and carbonyl absorption bands revealed several variables which must be considered when attempting to use infra-red spectroscopic methods for the determination of the water content of ink emulsions. These factors include the choice of pigment, (either transparent or opaque), the type of cell medium, and methods for dispersing added water into an ink. The initial problem encountered was a lack of reproducibility when attempting …

Intensity Scale Sensitometer, Swaminathan Kalyanam

Theses

None provided.

Redesign Of The Rms Granularity Meter, Robert Bathgate, Filippo Ferrauto

Theses

A device for measuring RMS granularity of uniformly exposed and uniformly processed photographic material was built. This paper deals with the construction of the major components of the system. The components constructed were the lamp mount, lamp housing, current regulated ripple free power supply for the lamp, the replacement of the motor drive system for the sample stage with a synchronous motor, and the construction of the photo detection system. All these components were mounted on a triangular optical bench around an existing symetrical design microdensitometer with rotating sample stage.

Production Of A Film On Conservation Education, Lesley Woodfin

Theses

None provided.

Studies Of The Properties Of Poly (Ethylene Oxide) As A Substitute For Gum Arabic In The Fountain Solution, Orapan Chongpipatanasook

Theses

Poly (ethylene oxide) is a polymer of ethylene oxide. It is one of the classes of synthetic water soluble resins which are commercially available. The properties of poly (ethylene oxide) as a desensitizer in the fountain solution were studied. The solution of this resin was compared to gum arabic solution. The investigation included the study of the physical properties of the solutions at different concentrations as well as press performance. Comparisons were made as to wettability, viscosity, surface tension, the ability to clean the plate, the resistance to scum, printing sharpness, resolution, and the plate-press characteristic curve. The experiments were …

Interimage Effects In Various Subtractive Color Materials, Philip Wychorski

Theses

In three color photographic processes the cyan dye image is usually controlled by the red sensitive emulsion, the magenta dye image by the green sensitive layer, and the yellow dye image by the blue sensitive layer. Due to the proximity of these three layers in a color film interactions among the images are found to occur. It has been found that when the images are combined into a three color picture they do not have the same characteristics as they would have if they occurred separately. The density produced in each layer depends not only on the amount of exposure …

Mass Production Techniques For The Studio Potter, James Halvorson

Theses

Not Included

Observer Recognition Of Targets Imbedded In Noise, Brian Nastvogel

Theses

Noise in a photographic system is generally non-additive. As of today there is no model to explain a non-additive noise system. That best model that we have of the photographic system is in terms of additive noise systems.

By adding a noise effect to a signal an additive noise effect can be obtained. What was investigated in this thesis was what effect the adding of noise in a photographic system plays in an observers ability to recognize a signal that is present in the noise.

By photographing a noise field and adding it to a signal target an additive noise …

Calculation Of The Time Averaged Optical Transfer Function By The Fast Fourier Transform, Jan Pierce

Theses

The fast Fourier transform is used in two-dimensions to calculate the apodizing effect of a center opening pupil shutter. Two shutter models are investigated and compared, a circular shutter with diameter a function of time, and a five-bladed leaf-type shutter. The influence of shutter shape, defocus, and third and fifth order spherical aberration on the time-averaged optical transfer function is investigated. The results indicate that there is only a small effect on resolution and depth of focus due to shutter motion in a well corrected optical system.

Prediction And Correlation Of The Salt-Effect In Vapor-Liquid Equilibrium, Enrique M. Bekerman

Theses

The feasibility of developing a method of correlation and prediction, for mixtures of two solvents containing a dissolved salt has been studied. The procedure consisted of arriving at the interaction parameters for the three binary systems (solvent 1-solvent 2, solvent 1-salt, solvent 2-salt) and using these to calculate the ternary results. Attempts to generate interaction parameters for the solvent-salt binaries by means of the Wilson equation were unsuccessful, whereas, use of the NRTL equation resulted in a very good fit of the binary data.

In correlating the ternary results, it became necessary to redefine the liquid phase mole fractions and …

Subcontracting By The Petrochemical Engineer-Constructor, Michael Peter Skurla

Theses

An analysis has been made of the methods used by a Petrochemical Engineer-Constructor, who has national labor agreements, in deciding if the construction phase of a project should be done by a subcontract method of construction or be accomplished on a direct hire basis. The petrochemical complex under discussion is considered to be in the $75 million range for the total installed cost including design, engineering, procurement, and construction.

The influence of subcontracting portions of the construction phase by the Engineer-Constructor is reviewed with its impact on: the client; project schedule and cost; local and national labor relations, because of …

The Effects Of Angularity On The Compaction And Shear Strength Of A Cohesionless Material, Richard Edward Swiderski

Theses

Several physical methods are described for the practical measurement and rating of angularity (shape) of cohesionless soil particles. Angularity is determined by utilizing the fundamental property of a sphere: a sphere has the smallest contact surface area of any shape for a given volume. Therefore, any other shape will exhibit a greater contact surface area and consequently will have a greater frictional resistance which is a function of its degree of angularity.

The effects of angularity on the physical behavior (e.g. strength) of cohesionless soils was investigated at various relative compaction densities. For this purpose a combined compaction and direct …

Non-Standard Workweek Scheduling Technique Selection, John Alexander Oak

Theses

This thesis presents a description of non-standard work scheduling techniques and a comparison method which enables decision-makers to differentiate between available work-scheduling alternatives with the purpose in mind of selecting the most appropriate and suitable arrangement. The method developed calls for the decision-maker to follow a five-step sequential process to obtain final results. The ingredients necessary to achieve such final results are obtained in a manner similar to that demanded by decision-making-under-uncertainty conditions commonly followed in actual industrial settings.

Since the primary objective of business management is the achievement of a profit through the manipulation of available resources, initial sections …

Tumbling Through Time: An Inquiry Into Vision, Charles Fisher

Theses

None provided.

Design, Construction, And Testing Of Sequentially Flashing Led Array To Study Angular Camera Motion In Hand Held Camera Systems, Randall Hube

Theses

This project deals with the construction of a device to determine the actual angular motion in a hand held camera system caused only by the holder. An array of LEDs (8x8) is flashed so that one LED flashes at a time in sequence. This sequence is photographed by a system suffering from motion effects and this is compared with the image of the array when no motion effects are present. The displacements of each "blip" with respect to time is used to determine the motion of the camera system.

Design And Construction Of An Edge Exposure Apparatus, Michael Benson

Theses

A means of producing photographic edges using visible radiation is often a requirement for evaluating some of the image characteristics of a photographic emulsion. The method of producing edges described uses a high quality razor blade for the knife edge held at a small angle to the film plane. The instrument is detailed and elaborates on the major features of the constructed apparatus. These features are a vacuum surface to insure film flattness; the knife edge held by a jaw-clamp assembly that pivots to allow for contrast control of the image; and exposure through a tungston-halogen lamp and an electronic …