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Articles 9991 - 10020 of 10106
Full-Text Articles in Entire DC Network
Black Faces And Their Emotions, Margaret Anderson
A Nomograph For The Rapid Solution Of The Arrhenius Equation, Joseph John Lamont
A Nomograph For The Rapid Solution Of The Arrhenius Equation, Joseph John Lamont
Theses
There are presently no calculational aids for the rapid computation of the Arrhenius parameters of the chemical reaction rate equations.
Two nomographs for solving the Arrhenius equation for the relative reaction rate constants at different temperatures, and for computing activation energies and frequency factors are presented. Several graphs and tables of the relative reaction rate constant as a function of activation energy and temperature are also presented.
The nomographs, graphs and tables can be used, singly or combined, in lieu of numerical calculation for the solution for Arrhenius parameters, or the computation of rate constants.
A computer program included in …
Teilhard De Chardin's Mass On The World, Mary Stover
Design Of A Tactile Vocoder, Roger Carr
Design Of A Tactile Vocoder, Roger Carr
Theses
A tactile vocoder is designed for the feedback of acoustic cues for detection by the sense of touch. Design objectives based on speech signal properties are generated. An existing spectrum channel vocoder is the starting point of the design. The follow-on modulation stage after the filter channels of the spectrum channel vocoder is built up in a breadboard model and tested. The transfer function of the modulation stage has an input dynamic range of 68 decibels, being linear over 38 decibels of this range. The complete breadboard model using one of the filter channels has an input dynamic range of …
Computer Application Of Historical Data, Raymond Wright
The Reaction Of O-Propylphenyl Azide With Di-N-Propylamine, Seyed Ziaeddin Razavi
The Reaction Of O-Propylphenyl Azide With Di-N-Propylamine, Seyed Ziaeddin Razavi
Theses
Nitration of n-propylbenzene resulted in O-nitro-n-propylbenzene. Reduction of this compound gave o-n-Propylphenyl azide was prepared by diazotization of o-n-propylaniline followed by treatment with sodium azide.
Photolysis of o-n-propylphenyl azide in di-n-propyl-amine yielded two new azepines, 2-di-n-propylamino-3n-propyl-3H azepine and 2-di-n-propylamino-7-n-propy1-7H-azepine. Their structures were assigned on the basis of their physical properties (i.e. I.R., U.V., N.M.R., N.S. and elemental analysis).
Photolysis of the azide at room temperature gave 26.9% o-n-propylaniline and 4.3% 2-di-n-propylamino-3-n-propy1-3H azepine, but when the photolysis was carried out in the presence of the triplet photosensitizer (xanthen-9-one) the yield of o-n-propylaniline was increased to 34.6% and the yield of 2-di-n-propylamino-3n-propy1-3H-azepine …
The Search For The Mystic Element In Weaving, Nasrin Keyhan
The Effect Of Flash Duration On Spectral Color-Naming, David Loshin, Edward Saunders
The Effect Of Flash Duration On Spectral Color-Naming, David Loshin, Edward Saunders
Theses
The effect of flash durations of 5 milliseconds (msec.), 500 msec., and 5 seconds on a color naming technique was examined in a dark –field Maxwellian View optical system. Although the results showed variability among three subjects in most regions of the spectrum, all subjects were tested and showed to be part of the population for normal color perception. Graphical interpretation was made for the average of all subjects. There was little indication that color naming shifted, although there are indications of hue purity increases with flash duration. In portions of the spectrum there is an increase in saturation from …
My Daughter Tisha And Our Art, Catherine Jepson
An Instrument For Rapid Determination Of Granularity In Photographic Film Samples, Melvin E. Pollard
An Instrument For Rapid Determination Of Granularity In Photographic Film Samples, Melvin E. Pollard
Theses
A scanner based on the principle of the classic microdensitometer was assembled for the purpose of rapid granularity determination. A rotary stage was used to allow the generation of a root-mean-square (rms) voltage signal proportional to rms Transmittance in the sample. A mathematical relation was then developed to calculate granularity. The scanner was calibrated and was proved capable of 10 percent accuracy with 95 percent confidence.
Figurative Painting And The Photograph, Thomas Insalaco
Personal Imagery And Paint, Stuart Green
The Investigation Of Sculptural Forms, John Frisenda
Familia, Maria Emerson
The Stunting Of Creative And Mental Growth; Or, The Evolution And Pollution Of Ideas, Nelson Dodson
The Stunting Of Creative And Mental Growth; Or, The Evolution And Pollution Of Ideas, Nelson Dodson
Theses
None provided.
Photo Extensions By A Painter, Catherin Berger
Single Element Fiber Forms, Carolyn Thomas
Photographic Dependence/Independence, Patricia Porcynaluk
Problems In Perception: The Role Of Art In Special Education, Patricia Koch
Problems In Perception: The Role Of Art In Special Education, Patricia Koch
Theses
None provided.
Ceramic Sculpture And Sculptural Containers, William Rodler
Ceramic Sculpture And Sculptural Containers, William Rodler
Theses
The purpose of this thesis is to design and execute a series of ceramic sculptures and sculptural containers which reflect my personal creative philosophy as well as my individual style of aesthetic expression. These ceramic sculptures and sculptural containers to some extent, will be synthesized interpretations of organic and biomorphic forms from nature, which beside depicting the finest aesthetic features of various natural forms will also express the essential spiritual interpretation of natural objects and the characteristic gestures of natural forces. In carrying through this series of sculptural works based upon the natural stimuli of organic and biomorphic forms, I …
The Application Of A Non-Newtonian Rheological Equation To Low-Density Polyethylene, Jeffrey N. Goldstein
The Application Of A Non-Newtonian Rheological Equation To Low-Density Polyethylene, Jeffrey N. Goldstein
Theses
A generalized non-Newtonian equation describing the rheology of molten thermoplastics is verified for low-density polyethylenes. The equation is extended to account for both rheological temperature dependency and polyethylene molecular weight dependency. The prediction of the rheology of new polyethylenes without additional experimentation is thus possible.
The Effect Of Polymerization Variables On Reaction Rate And Intrinsic Viscosity, David H. Smith
The Effect Of Polymerization Variables On Reaction Rate And Intrinsic Viscosity, David H. Smith
Theses
The free radical solution polymerization of vinyl acetate in benzene was studied under simulated commercial conditions. The effects of monomer, initiator, inhibitor, and chain transfer agent concentration on the reaction rate and intrinsic viscosity were examined. The initial reaction rates with monomer concentrations from 40% to 70% and AIBN concentrations from 0.2% to 0.5% were in agreement with the kinetic equation, - d[M]/dT = K[M]2 [I]1/2. After the initial reaction there was an increase in the reaction rate apparently associated with high viscosities, which is consistent with the Trommsdorff effect. The addition of hundredths of a percent …
Painting Into Space, Natalie Schwartz
The Modulation Of Sine-Wave Gratings At Fourier And Fresnel Imaging Points, Donald Kingsley
The Modulation Of Sine-Wave Gratings At Fourier And Fresnel Imaging Points, Donald Kingsley
Theses
When illuminated by a coherent light beam, a periodic object will be imaged in near-field space at predictable intervals. This phenomenon is termed self imaging. Recordings of the intensity distribution of sine-wave gratings were made at several positions behind the gratings. The modulation of the images was calculated and used as a predictor of distance from the grating. Positional accuracies of one part in one-hundred fifty-eight were obtained.
The Function Of Flat Shape In Painting, Marla Friedrich
Contemporary Religious Graphic Design, Vlasta Paul
Photographic Letterforms, Frank Argento
A Study Of Consumer Acceptance Of A No-Loss Credit Card Verification System, Dean Arlidge
A Study Of Consumer Acceptance Of A No-Loss Credit Card Verification System, Dean Arlidge
Theses
This research study focuses upon Credit Cards and a proposed verification method to reduce the risk of fraudulent use. It is anticipated that the proliferation and growing use of credit cards will require the use of security concepts offering built-in point of use protection that is automatic and reliable. A suggested concept is the use of a combined electronic credit card and a memory device. The proposed verification technique combines a user electronic credit card and memory number along with a simple imprinter which would be operated by the person accepting the credit card. Credit cards have become a widely …
A Study Of The Holy As An Aesthetic Phenomenon, Thomas Raterman
Certain Relationships Between Painters Of The Mannerist School And Selected Contemporary Painters, Phillip Duell
Certain Relationships Between Painters Of The Mannerist School And Selected Contemporary Painters, Phillip Duell
Theses
None provided.