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Articles 11161 - 11190 of 13413
Full-Text Articles in Entire DC Network
Small Area Densitometry Utilizing Fiber Optics, Eric D. Bruening
Small Area Densitometry Utilizing Fiber Optics, Eric D. Bruening
Theses
A transmission densitometer utilizing fiber optics for the efflux geometry was designed, constructed, and tested with several black and white films, and one color film. The system was semi-specularly illuminated and used semi-specular collection. The system demonstrates the feasibility of using fiber optic bundles in sensitometric equipment. Scattering properties of silver emulsions, color dye infra-red radiation transmission, and assorted electronic factors which introduce error in densitometric values are observed and discussed.
Similarities Between Chinese Taoism And Western Graphic Design, Lillian Yin-Ling Sung
Similarities Between Chinese Taoism And Western Graphic Design, Lillian Yin-Ling Sung
Theses
None provided.
Reporter - May 8th 1981, Rit Reporter Staff
Reporter - May 8th 1981, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - May 7, 1981, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - May 7, 1981, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Qualities Of Uncoated Groundwood Paper Affecting Adhesive Binding Strength, Kenneth S. Gross
Qualities Of Uncoated Groundwood Paper Affecting Adhesive Binding Strength, Kenneth S. Gross
Theses
This investigation has examined the adhesive binding of paper, with particular attention to the action of the fiber/adhesive interface. The efforts of this research were concentrated on relating properties of the paper to strength of the resultant binding. To simulate the problems of economical binding styles, uncoated groundwood paper and hot melt adhesives were studied. Although the hypotheses assumed that a strong interfiber bond within the sheets would lead to a strong binding, it was found that the most critical factor was not the strength of the sheet, but the availability of the fibers to the adhesive. The strength of …
Factors Influencing The Acceptance Of Computer Assisted Estimating, Sharon Ryan
Factors Influencing The Acceptance Of Computer Assisted Estimating, Sharon Ryan
Theses
In spite of its advantages over manual estimating methods, computer assisted estimating (CAE) lacks acceptance in the printing industry today. Possible reasons for non-acceptance are: 1) the cost of CAE, 2) CAE's lack of versatility, 3) printing manager's lack of knowledge on the subject of CAE and/or computers in general, and 4) the small size of the majority of the printing companies does not warrant the use of CAE. A survey questionnaire was designed for the purpose of finding out how printing companies feel about CAE, and if the reasons listed above are, in fact, major influences on their decision …
Reporter - May 1st 1981, Rit Reporter Staff
Reporter - May 1st 1981, Rit Reporter Staff
University Publications
No abstract provided.
Contemporary Furniture And The Pursuit Of Comfort, Joseph G. Prutch
Contemporary Furniture And The Pursuit Of Comfort, Joseph G. Prutch
Theses
None provided.
The Halftone Effect In Color Photographic Enlargements, Rick Crowsey
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 …
Correlation Between Maximum Density And Log Exposure Range Of Quality Prints, David Baer
Correlation Between Maximum Density And Log Exposure Range Of Quality Prints, David Baer
Theses
An investigation was made to determine the correlation between the maximum density and log exposure range of photographic paper when making "quality" prints. The 1966 ANSI log exposure range formula assumes that papers which have the same log exposure range but differ in maximum density will print the same negative successfully. It has been shown with 27 Judges that when the 1966 ANSI log expo sure range formula is used the maximum density has an effect on the effective log exposure range such that papers which have the same log exposure range but differ in maximum density will not print …
Depth Of Field In High Magnification Fine Grain Photography, Mark Konieczny
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 …
Campobello Island: Far From The Mainstream, Stephen O. Muskie
The Effect Of Temperature And Relative Humidity During Drying On The Covering Power Of Processed X-Ray Films, John M. Lauffer
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 …
Image Degradation In A Diffusion Transfer Process, Peter Petch
Image Degradation In A Diffusion Transfer Process, Peter Petch
Theses
The Diffusion Transfer Process is now widely used in the Graphic Arts industry, and it is important to determine to what length different factors affect the optimum use of it. The effects of exposure, age of the processing solution, and line frequently on the image quality of the Kodak PMT system were studied. Exposure was varied by exposing the material to a standard illuminance for different amounts of time; the processing solution was aged by bubbling air through it for varied amounts of time; line frequency was varied by using a Kodak sinusoidal target and examining the images of two …
A Digital Image Processing System For Slow Scan Television, James Schueckler
A Digital Image Processing System For Slow Scan Television, James Schueckler
Theses
This paper describes a low cost, but powerful, digital image processing system. Although general purpose, it was designed for experimentation with amateur radio slow scan television (SSTV). The project involved conceptualizing, designing, building, programming, and operating the complete integrated system. The image format is the SSTV standard: 128 picture elements (pixels) per line, 128 lines, 4 bits per pixel. The IEEE Standard 696 (S-100) microcomputer bus was used for system interconnect to provide flexibility and expandability. Several microcomputer boards were purchased, and two image interface boards were designed and built by the author. One image interface board provides for transmitting …
Edge Sharpness Effects On Computer-Generated Holograms, Clinton S. Potter
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
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 …
Scene Illuminate Effect On Additive Two-Color Reproduction, John C. Manfredo
Scene Illuminate Effect On Additive Two-Color Reproduction, John C. Manfredo
Theses
Whether a two-color reproduction from a red and green additive process is acceptable depends largely on the nature of the scene and its illumination. Additive two-color reproduction will be explored here using different scene illuminants and also different red and green filter combinations. Two projection methods are also examined. Red and green separations were produced by photographing a scene through 16 different filter combinations and 3 different scene illuminants. These separations are then projected two different ways. One method involves projecting the separations back through the red and green filters they were taken through, while in the other method the …
A Comparison Of The Random Dot And The Conventional Halftone Printing Process With Respect To Color Characteristics, Sanat Hazra
A Comparison Of The Random Dot And The Conventional Halftone Printing Process With Respect To Color Characteristics, Sanat Hazra
Theses
A comparative study was made of random dot printing and conventional halftone printing with respect to color characteristics. Random dot printing is similar to continuous tone printing or very high frequency screen ruling and is capable of overcoming the limitatio of halftone printing. The randomly selected dots are achieved by the grain structure of the pre- sensitized printing plates. The advantages and the disadvantages of this process over conventional halftone printing process are discussed. The images and the test targets of both the processes were exposed to, and printed from a single plate for each process color so as to …
Simultaneous High Performance Liquid Chromatographic Determination Of Procainamide, N-Acetylprocainamide, Disopyramide, Mono-N-Dealkyldisopyramide, Quinidine, And Propranolol In Serum, James F. Wesley
Theses
We describe a method for the simultaneous high performance liquid chromatographic determination of several antiarrhythmic drugs and some of their metabolites after extraction from 2.5 ml of spiked pooled sera. The extracts were applied to a C8 reversed phase column. Nine compounds of interest were resolved within the 30 minute run. An initial mobile phase of 80% phosphate (25 mmol/L, pH 3.5), 20 % organic (acetonitrile: methanol, 2:3) was maintained for 2 min at which time a linear gradient was used to change the mobile phase to 30% phosphate, 70% organic at 20 min after injection. This composition was maintained …
An Investigation Of The Vapor Cushion Thickness, Temperature, And Vaporization Time Of Leidenfrost Drops, Frank Bonsignore
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 …
R.I.T. News & Events - April 30, 1981, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - April 30, 1981, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Reporter - April 24th 1981, Rit Reporter Staff
Reporter - April 24th 1981, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - April 23, 1981, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - April 23, 1981, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Reporter - April 17th 1981, Rit Reporter Staff
Reporter - April 17th 1981, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - April 16, 1981, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - April 16, 1981, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Reporter - April 10th 1981, Rit Reporter Staff
Reporter - April 10th 1981, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - April 9, 1981, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - April 9, 1981, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Reporter - April 3rd 1981, Rit Reporter Staff
Reporter - April 3rd 1981, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - April 2, 1981, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - April 2, 1981, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.