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Articles 9181 - 9210 of 10018
Full-Text Articles in Entire DC Network
Reporter - October 10th 1975, Rit Reporter Staff
Reporter - October 10th 1975, Rit Reporter Staff
University Publications
No abstract provided.
Reporter - October 3rd 1975, Rit Reporter Staff
Reporter - October 3rd 1975, Rit Reporter Staff
University Publications
No abstract provided.
Identification Thresholds Of The Human Visual System For An Alphanumeric Resolution Test Object, Mark Bobb
Identification Thresholds Of The Human Visual System For An Alphanumeric Resolution Test Object, Mark Bobb
Theses
Many investigations of the detection threshold of the human visual system have been conducted, and a few recognition threshold studies can be found, however no identification threshold data are available. This paper documents research on the observer's identification threshold for an alphanumeric resolution test object presented at various average luminance levels, contrasts, and contrast polarities. These factors affected the identification threshold in a similar way to the effects they exert on the observer's detection and recognition thresholds; the test object contrast being the most significant factor. Direct numerical comparisons between the various thresholds were not possible due to the large …
R.I.T. News & Events - September 29, 1975, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - September 29, 1975, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Reporter - September 26th 1975, Rit Reporter Staff
Reporter - September 26th 1975, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - July 28, 1975, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - July 28, 1975, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Ntid Focus July/August 1975, Ntid Marketing And Communications
Ntid Focus July/August 1975, Ntid Marketing And Communications
National Technical Institute for the Deaf Papers
'Wall'||Awards Night Promises "A New Day"||Chris and Gayle Find Prescription for Success||Editorial: Graduation||Educating Potential Employers||First NTID Alumni Club Established||Graduation||Graduation List||Keeping America Beautiful||NSC||Ned Behnke Wins "Top Artist" Title||New Horizons||No Need for Words||On A Farm Named Wild Winds||Paul Johnston||Record-breaker Ron Rice||The Crack in the Wall (student poem)||The NTID Story.||Top Scholar Winners
R.I.T. News & Events - June 30, 1975, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - June 30, 1975, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
A Comparison Of The Properties Of Conventional Offset Ink And Ultraviolet Ink, Vanchai Sirichana
A Comparison Of The Properties Of Conventional Offset Ink And Ultraviolet Ink, Vanchai Sirichana
Theses
Some of the advantageous characteristics of ultra violet ink are said to be the absence of pollution and reasonable energy consumption as well as rapid drying (curing). Little is published about physical properties or print quality. Printers require information in this regard because the reports which are presently available are not clear and lack in detail. If the printability of UV inks were equal to that of conventional offset ink, this ink would be close to an ideal ink. This work was under taken so as to compare the properties of ultraviolet ink with conventional offset ink. The inks selected …
The Relationship Between The Relative Legibility Of Textual Material And Resolving Power In A Microphotographic System, John Compton
The Relationship Between The Relative Legibility Of Textual Material And Resolving Power In A Microphotographic System, John Compton
Theses
The application of microphotographic methods for the processing and storage of information has grown steadily during the last two decades. The microphotographic system, through which the information must pass at a minimum is as follows: Step 1: Photographing of the original document at a large reduction onto a silver halide microfilm. Step 2: Duplicating through contact printing onto a non-silver photographic material. Step 3: Second generation duplication onto a nonsilver photographic material (This image may be used on a microfilm reader). Step 4: Enlargement of the second generation duplicate to give a hard copy print. One of the main objectives …
The Effect Of Blue Base Tint On The Sensitivity And Acutance Of X-Ray Films, Michael Klein
The Effect Of Blue Base Tint On The Sensitivity And Acutance Of X-Ray Films, Michael Klein
Theses
An experiment was devised to quantitatively measure the effect of blue base tint (inherent in most medical x ray films) on the sensitivity and acutance of an x ray film. Results showed no significant difference due to the blue base tint for sensitivity. However, a significant difference was found for the base tint's effect on acutance of an x ray film. It was determined that the difference in acutance was due to an "anti–halation effect" of the blue base dye.
Image Mechanisms In Screenless Lithography, Charles Martin
Image Mechanisms In Screenless Lithography, Charles Martin
Theses
In conventional lithography, a halftone screen is used to photographically convert the continuous- tone image of the original into a grid of very small, closely spaced dots of constant density but varying areas. Screenless or continuous-tone lithography is a printing process capable of reproducing images with gradated tones without the use of a halftone screen. Screenless lithography has a high quality potential because it has few of the inherent problems that limit the quality of the halftone process. This thesis investigates the image mechanisms in screenless lithography and in particular the role of variable water receptivity. It was hypothesized that …
Reporter - May 30th 1975, Rit Reporter Staff
Reporter - May 30th 1975, Rit Reporter Staff
University Publications
No abstract provided.
Reporter - May 23rd 1975, Rit Reporter Staff
Reporter - May 23rd 1975, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - May 19, 1975, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - May 19, 1975, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Reporter - May 16th 1975, Rit Reporter Staff
Reporter - May 16th 1975, Rit Reporter Staff
University Publications
No abstract provided.
Computer Predesign Of Cooke Triplet Anastigmat, Frank Vanek
Computer Predesign Of Cooke Triplet Anastigmat, Frank Vanek
Theses
There are many methods for designing the Cooke Triplet Anastigmat. In this thesis, one of them is programmed into a computer in BASIC language. Because of the length of the program, it had to be split into two separate programs using a data file to save data produced by the first and needed by the second. The first program uses the equation for system power, and the equations for Petzval curvature, longitudinal and lateral chromatic aberrations, space ratio to solve for the powers and spacings of the elements. Solution is accomplished by the Crout method of simultaneous equation solution and …
Design And Construction Of A Low Frequency Mtf Camera, Howard Bozenhard, Jerry Covey
Design And Construction Of A Low Frequency Mtf Camera, Howard Bozenhard, Jerry Covey
Theses
A low frequency Modulation Transfer Function Camera has been designed and constructed. Areal sinusoidal targets are imaged through a cylindrical lens and an objective lens to form transmission sinusoidal images. Modulation is changed by varying the background illumination. The range of available frequencies is from .3 to 30 cycles per millimeter, and the modulations available are 25, 33 44, 55 and 64%.
R.I.T. News & Events - May 12, 1975, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - May 12, 1975, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Reporter - May 9th 1975, Rit Reporter Staff
Reporter - May 9th 1975, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - May 5, 1975, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - May 5, 1975, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Reporter - May 2nd 1975, Rit Reporter Staff
Reporter - May 2nd 1975, Rit Reporter Staff
University Publications
No abstract provided.
Vesicular Image Formation In Silver Halide Materials, Ken Straub, Victor Woo
Vesicular Image Formation In Silver Halide Materials, Ken Straub, Victor Woo
Theses
An increase in gamma of fourteen can be obtained with a loss of one-third stop in speed by treating a silver halide film in a ten to thirty percent solution of hydrogen peroxide for five to fifteen seconds and heating it in sixty to ninty degree centigrade steam. Light refracting oxygen bubbles are formed in the emulsion proportional to the amount of silver metal present. Increasing the concentration of hydrogen peroxide was found to decrease speed while increasing gamma. Temperature of the steam was not a significant factor for speed or gamma. Increasing hardness of the gelatin, increasing peroxide immersion …
Optimization Of A Particular Aerial Photographic System By Simultaneous Intensification, Richard D. Young
Optimization Of A Particular Aerial Photographic System By Simultaneous Intensification, Richard D. Young
Theses
Under the conditions of a low-altitude, rapid access photographic system, a method of simultaneously intensifying image exposures is compared to low intensity latensification. The simultaneous intensification resulted in a speed increase of 2.4 times, while latensification produced a speed increase of 1.7 times. Latensification was more effective in most of the other responses that were analyzed: reduction of Contrast Index was less by 0.1; speed at the minimum gradient point defined by the untreated strips was increased by latensification by 1.29 times compared to 1.23 times by simultaneous intensification. The detective quantum efficiency of the latensified film was higher than …
Electrodeposition Of Metal Onto Glass, Janice Whitcraft
Reporter - April 25th 1975, Rit Reporter Staff
Reporter - April 25th 1975, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - April 21, 1975, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - April 21, 1975, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Reporter - April 18th 1975, Rit Reporter Staff
Reporter - April 18th 1975, Rit Reporter Staff
University Publications
No abstract provided.
R.I.T. News & Events - April 14, 1975, University News Services, Rochester Institute Of Technology
R.I.T. News & Events - April 14, 1975, University News Services, Rochester Institute Of Technology
University Publications
No abstract provided.
Reporter - April 11th 1975, Rit Reporter Staff
Reporter - April 11th 1975, Rit Reporter Staff
University Publications
No abstract provided.