Digital Commons Network^™

The Importance Of Family Interactions With Institutionalized Disabled Individuals, Lila Jaber Abdullah

Theses

Not available.

Advantages And Practical Limitations Of Mathematical Continuity In Cam Profile Design, Edward Gunzelmann

Theses

The basics of cam profile design are discussed with emphasis on mathematical profile types i.e., polynomial versus trigonometric. Comparisons are made and recommendations on the applicability of the various profiles with respect to their dynamic performance are extracted from existing texts. A literature search was done into specific cam system dynamic performance. The categories researched were: a) shock spectrum analysis with return profiles as a forcing function, b) cam shaft wind up, c) follower stiffness effects, d) crossover shock and "jump" phenomena, e) drive errors to the cam, f) manufacturing tolerance effects, g) curve types, h) return spring surge, and …

A Ruin Aesthetic, John Hutchins Ruppert

Theses

Not listed.

The Removal Of Low Concentrations Of Heavy Metals From Photographic Processing Effluents Using A Modified Crovex Silver Recovery Metallic Replacement System, John W. Miller Jr

Theses

Parameters have been established for effective removal of low concentrations of silver and cadmium from photographic processing effluents using a CROVEX silver recovery metallic replacement system. Parameters include: total photographic processing effluents (composed primarily of wash effluent, fixer, and developer), residence time, pumping pressures, and maximum heavy metal input. Techniques using these parameters yield silver and cadmium removal approaching 98%.

Prediction Of Small-Scale Densities Using The Chemical And Optical Spread Functions, David S. Cline

Theses

Development adjacency effects and optical spread in photographic systems cause difficulties in predicting small-scale densities. These effects can be quantified as spread functions. The optical spread func tion describes the light scatter of the film. The chemical spread func tion describes the lateral diffusion of development- inhibiting and dev elopment-accelerating reaction products. These spread functions can be used along with the sensitometry and covering power relationships of the system to predict small-area densities from the object exposure profile. A study based on C. N. Nelson's work was undertaken to develop a math ematical model that uses the optical and chemical …

Second Nature, Joseph Solan

Theses

None provided.

Digital Image Modeling Of Film Granularity And Effect On Subjective Pictorial Quality, Jerold B. Lisson

Theses

The basic question posed by this study is - WHAT IS THE SENSITIVITY OF PICTORIAL SUBJECTIVE QUALITY TO A GRANULARITY INCREASE? This question is decidedly different than the typically posed question of granularity studies, that is - WHAT IS THE SENSITIVITY OF PERCEIVED GRANULARITY (graininess) TO A GRANULARITY INCREASE? In the subjective evaluations herein, the former question was considered most pertinent to response from the general public, who in toto, do not interpret graininess as an attribute per se, but only that ubiquitous factor known as "quality" - poor, indifferent, or good. All references in this paper to granularity/quality thresholds …

Image Enhancement In A Microfilm Projection Printer Utilizing Partial Coherence And Spatial Filtering, Donald Pophal

Theses

An optical system was assembled for a study of spatial filtering and partial coherence. It was used to produce enlargements of microfilm images at a magnification of 12-X. Enhancement of fine-detail contrast was obtained by means of a spatial filter that transmitted most of the light diffracted by the microfilm negative and absorbed about 60$ of the undiffracted light. The filter increased the modulation transfer function (MTF) of the enlarging system by a factor of about 1.5 measured at spatial frequencies lying in the region where the eye is most sensitive. At higher frequencies, the enhancement became greater than was …

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 …

One Lindenwood Experience, Frank Michael Gallagher

Theses

Unavailable.

Some Observations On The Development Of Use Of Computer Informational Systems In Hospital Settings And Recommendations For Proposed Implementation At St. Joseph's Hospital, Andrew Z. Richardson

Theses

An intent is stated to discuss the developmental history and social impact of computer information retrieval systems on the hospital setting with primary area of focus being the Pharmacy Department. The interrelationship among various areas in the hospital setting are considered for need and cost/benefit associated with the use of a computerized information retrieval system.

A Case Study of St. Joseph Hospital is presented in example of evaluative consideration for implementation of a computerized information retrieval system.

Different forms of the "state-of-the-art" in informational systems are considered for their effective impact on cost/ benefit ratios to patient care and hospital …

Thermovacuum Forming Plastics For Artistic Endeavors, Rose E. Corcoran

Theses

None provided.

Coherent Optical Linewidth Measurement Of Thick Films On Integrated Circuit Wafers, Andrew Pomerene

Theses

A linewidth measurement system has been developed which incorporates a coherent laser microspot with a piezo flexure-pivot translational stage. A line is scanned beneath the microspot and reflected energy collected with an on axis geometry normal to the wafer. Position versus reflectance data are presented for lines patterned in thick and thin oxide films on I.e. wafers.

Visual Modulation Transfer Function As A Predictor Of Acuity, Thomas A. Sebring

Theses

The use of Fourier and modulation transfer techniques implies the ability to characterize an optical system and predict the output resulting from various inputs. In this study, the optical system is defined as a projection system, rear projection screen, and the human eye. A determination of modulation thresholds of visibility for a series of sinusoidal (in transmittance) test objects results after some manipulation in the modulation transfer function of the complete system. This result is then used to predict the subject's ability to resolve conventional acuity challenges. These conventional test objects are then manufactured for projection in the system. Correlation …

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 …

The Bausch & Lomb Industrial Design Department Identity Program, Lorrie Frear

Theses

None provided.

The Effect Of Band-Passed Spatial Noise On The Perception Of Grain, Wallace Carpenter

Theses

A one octave ranged noise target was constructed with the aid of fourier optics and band-pass spatial filtering. Band-limited noise targets of varying degrees of percent modulation were then generated as a means of determining threshold values of noise perception at low spatial frequencies.

An Investigation Of The Vapor Cushion Thickness, Temperature, And Vaporization Time Of Leidenfrost Drops, Frank Bonsignore

Theses

The subject of this investigation was the film boiling of liquid drops on a hot horizontal surface (the Leidenfrost Phenomenon) . Using Gottfried and Bell's model of a Leidenfrost drop, the thickness of the vapor cushion beneath film boiling water drops, 6, was calculated over a range of test plate and drop temperatures. The results indicated that the vapor cushion thickness varied very slowly with test plate temperature and maintained a finite value at test plate temperatures where the Leidenfrost Phenomenon cannot be initiated. To experimentally verify this fact, a heat exchanger was fabricated to cool the hot test plate …

Contemporary Furniture And The Pursuit Of Comfort, Joseph G. Prutch

Theses

None provided.

Edge Sharpness Effects On Computer-Generated Holograms, Clinton S. Potter

Theses

Computer-generated holograms refer to a class of holograms which are produced as a graphical output from a computer. This paper investigates the relation. ship between the resolution in the system used to re duce the graphical artwork to a reasonable size for diffracting light and the quality of the reconstructed hologram. A number of reduction schemes are examined including a one-step reduction onto a general purpose film, a one-step reduction onto a high resolution film and a two-step reduction scheme using coherent illumination during the second reduction.

The Evaluation Of Positive Photoresist Speed, Donis Flagello

Theses

The feasibility of photographic speed values for positive photoresist is evaluated. Speed is defined as the reciprocal of exposure necessary to produce a desired response. An outline of the microlithographic process, the chemistry of positive resist, and previous exposure models precede the experimental body of work to facilitate understanding of the photoresist system. The experimental method proposes a mathematical model describing the resist response to exposure. Photographic speed values result from this model. They are tested for sensitivity to process changes using Analysis of Variance. One speed definition is chosen as a possible standard and process control. It is based …

The Halftone Effect In Color Photographic Enlargements, Rick Crowsey

Theses

In continuous-tone photography, a 'Halftone Effect" sometimes occurs that alters the tone reproduction in a distinctive way. Highlight contrast is decreased and middletone densities are lowered. Published data show that this effect occurs in black-and-white photography when the grain pattern of the negative is reproduced very sharply in the print . High-magnification enlargements are especially susceptible. Does a corresponding effect occur in color photography? A search of the literature reveals no answer. The research here described is to determine, by direct measurements of densities in sharp and blurred enlargements, the magnitude of the halftone effect in particular color enlargements from …

The Effect Of Temperature And Relative Humidity During Drying On The Covering Power Of Processed X-Ray Films, John M. Lauffer

Theses

With the constantly decreasing silver reserves and correspondingly higher costs, film manufacturers are continually searching for methods to reduce the amount of silver that is used. By using closely controlled conditions of temperature and saturated salt solutions to provide control of relative humidity during drying of processed x-ray film, it was found that the covering power may be as low as 70$ of its maximum value depending on the conditions used for drying the film. The highest values for covering power existed when the film was dried at low temperatures and high relative humidities or high temperatures and low relative …

Depth Of Field In High Magnification Fine Grain Photography, Mark Konieczny

Theses

Under normal, general purpose photographic conditions, depth of field is determined by the size of a geometrical blur circle on the negative or print. Under high magnification conditions, another means of measurement must be used based on the wave nature of light and the resolution of the imaging system. For this purpose, an effective depth of field was determined on the basis that no significant deterioration of image quality could be detected by means of resolution and Transfer function in the range of frequencies where the eye transfer function is at its peak. The experimental values obtained were compared with …