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Articles 36631 - 36659 of 36659
Full-Text Articles in Physical Sciences and Mathematics
The Design Of A Multiple Intake Drainage Well, Orville L. Eliason
The Design Of A Multiple Intake Drainage Well, Orville L. Eliason
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The reclamation of water-logged land by suitable yet inexpensive forms of drainage is becoming a problem of constantly increasing magnitude. A fairly large portion of the extensive land areas, once considered as worthless has proved to be valuable by the introduction of proper drainage systems. Land areas, in which drainage in its simpler forms has proved inadequate, could perhaps be made valuable were it possible to develop an inexpensive yet effective form of drainage.
This paper has been prepared primarily for a consideration of poorly drained land areas and a possible means of their reclamation by a suitable choice and …
Dielectric Constant Of Absorbed Water, Reiji Funabiki
Dielectric Constant Of Absorbed Water, Reiji Funabiki
University of the Pacific Theses and Dissertations
That the dielectric constant of a substance is one of its important properties is a fact that has been very commonly taken into consideration by electrical engineers in design of apparatus and transmission lines. The importance of the dielectric constant is equally evident to the chemist working in the field of nonaqueous solutions, and Walden and others have spent a great deal of time and energy in attempting to measure the relationship of the dielectric constant of a solvent to its solvent ability, the degree of ionization of a solute dissolved in it, etc. Indeed it has become very common …
The Electret - An Effort To Find The Cause Of Its Permanent Polarization, Ernest F. Lundeen
The Electret - An Effort To Find The Cause Of Its Permanent Polarization, Ernest F. Lundeen
University of the Pacific Theses and Dissertations
Certain waxes when solidified in a strong electric field exhibit unusual electrical properties. Several days after formation there is a polarization in the direction of the field which seems to persist for an indefinite length of time. The surface that was in contact with the anode during formation first ass a negative charge and then obtains a positive charge, which under proper conditions is practically permanent. The surface that was in contact with the cathode first has a positive charge and then obtains a negative charge which is the permanent charge.
Radio And A Public Address System For The High School, Kenneth H. Westlake
Radio And A Public Address System For The High School, Kenneth H. Westlake
University of the Pacific Theses and Dissertations
All the findings and knowledge of electricity and magnetism are not new; even the Greeks as far back as 600 B. C. knew something about these forces. As time went on the facts increased.
After the experiments of Faraday, Maxwell, Hertz and such men as these, electricity and magnetism became a vital part of human life and endeavor. Within the last twenty-five years the advances in electricity have been very rapid. The action of the electric current is a vital part of many developments and is helping to make human life more enjoyable and interesting.
Almost all schools today are …
Actino- And Thermo- Response Of Molybdenite In Vacuo With Various Colored Lights, John H. Fulton
Actino- And Thermo- Response Of Molybdenite In Vacuo With Various Colored Lights, John H. Fulton
Master's Theses
The purposes of this investigation are to study the reaction of molybdenite cells to light of various colors while in vacuo and at various temperatures. The samples of molybdenite were also subjected to radiant heat in the last part of the experiment, which was undertaken to determine to some extent the amount of thermos-electric effect which was due to thermal radiation in the first part of the investigation.
An Investigation Of The Thermo- And Action- Electric Properties Of Molybdenite, William Otis Johnson
An Investigation Of The Thermo- And Action- Electric Properties Of Molybdenite, William Otis Johnson
Master's Theses
Considerable work has been done on various mineral substances and chemical compounds within recent years to ascertain, if possible, whether the substance possessed any degree of photo- or thermos-sensitivity; and, to determine the characteristics of these responses. Among the most prominent substances which have been tested are selenium, bismuth, antimony, hematite, stibnite, and molybdenite. It was the purpose of this investigation to summarize the phenomena that have occurred within samples of molybdenite under a variety of conditions involving heat, light, and e.m.f.
A Study Of An Objective Placement Examination For Sectioning College Physics Classes, John Milton Willson
A Study Of An Objective Placement Examination For Sectioning College Physics Classes, John Milton Willson
Masters Theses
"For several years the Department of Physics of the Missouri School of Mines has practiced sectioning of its classes in general physics. The aim has been to segregate in one section the students of superior ability, giving them a course including both the fundamentals of physics and their applications in engineering. The remainder are given a course in fundamentals without placing so much stress upon the applications...Another criterion used to supplement the first-year grade record is the student's score on the Iowa Placement Examinations. The physics examination consists of two parts, the Training Series and the Aptitude Series. These examinations …
The Three-Point Gap As A Means Of Control In Instantaneous Photography, Elgin Albert Denio
The Three-Point Gap As A Means Of Control In Instantaneous Photography, Elgin Albert Denio
Master's Theses
In 1926, Wynn Williams investigated the theory of the three-point gap, which phenomenon had been known and utilized for some time but until his investigation was not understood theoretically. This investigation has been divided into two distinct parts: First, when the energy was generated by a large Toepler-Holtz station machine; and second when the energy was generated by a one-kilowatt, 25,000 volt transformer.
A Bibliography Of The Theory Of Relativity, Ruth E. Richardson
A Bibliography Of The Theory Of Relativity, Ruth E. Richardson
University of the Pacific Theses and Dissertations
This thesis, a Bibliography of Relativity, has begun with a very meager knowledge of the amount of literature which has been written on the subject of relativity either s explanation or commentary. The project was to 11at all the books and periodical articles written on or about the subject Relativity which are on file in the libraries of the College of the Pacific, University of California and stanford up to and including the year 1920.
A Study Of The Striated Spark By The Method Of Instantaneous Photography, Laurence L. Cruise
A Study Of The Striated Spark By The Method Of Instantaneous Photography, Laurence L. Cruise
Master's Theses
In 1867 Toepler found the existence of a pulse spreading from the region around the spark immediately after it had passed. Since the density of the air in the pulse differs from that of the surrounding gas, the pulse is optically different from the rest of the field and so can be made visible by the “Shadowgraph Method.” Topeler’s work was the first of its kind where an instantaneous view, say of the order of several millionths of a second, of the electric spark was obtained. IN 1926 Dr. Zinszer, while studying the life history of the electric spark by …
Faraday's Laws Of Electrolysis, M. Aquinas
Faraday's Laws Of Electrolysis, M. Aquinas
Bachelors’ Theses
Physics has no equal, perhaps, in bringing the student to an appreciation of the beauty, the order and the harmony or the universe, and thus drawing the heart and the mind to God whose unbounded powers executed the eternal and marvelous wonders that are all about us.
It is intensely fascinating to take peeps into the "laboratories of God" and wonder what will be the next secret that He will let man in on. It seems as the ages roll by He gradually allows us to share more and more in His secrets or nature; He appears to be slowly …
Scholasticism An Intellectual Basis And Unifying Principle Of Modern Science, Alice V. Johnson
Scholasticism An Intellectual Basis And Unifying Principle Of Modern Science, Alice V. Johnson
Electronic Thesis and Dissertation
Amid the almost uninterrupted disintegration of systems during the last three centuries, the philosophy of St. Thomas has alone been able to stand the shock of criticism; it alone has proved sufficiently solid and comprehensive to serve as an intellectual basis and unifying principle for all the new facts and phenomena brought to light by modern science.
The Constant Of Torsion Of A Given Wire, Ella M. Blunk
The Constant Of Torsion Of A Given Wire, Ella M. Blunk
Bachelors’ Theses
"Using a given wire, the value of n determined dynamically is generally somewhat larger than the value determined by statical method. This is due partly to the fact that a wire, under the action of a torque, does not at once acquire its final twist. The twist increases under the application of a constant torque; and therefore, during a brief application of the torque (for example, during an oscillation of heavy body attached to the wire) the torque per unit twist has larger value than when the torque is applied for a long time. " Edwin Edser
The purpose of …
Ballistics, Fannie Goldthwaite Moon
Ballistics, Fannie Goldthwaite Moon
Dissertations, Theses, and Masters Projects
No abstract provided.
Color., Bruce B. Vance
Color., Bruce B. Vance
Electronic Theses and Dissertations
Color, any attempt to apply the scientific principles of color vision in the making of a picture must surely fail if it be not granted at the out set that it is only to a limited degree that those principles can apply. Color appreciation is as much a psychical as a physiological, and indeed, it is psychical not only with regard to the objective impression itself, but also with regard to the subjective, the associational mental process. Previous knowledge and training, experience traditions, the association of color impressions with impressions previously received through other senses and stored away as memories, …
A Study Of Light Metals And Alloys At Low Temperatures, Donald E. Higgins
A Study Of Light Metals And Alloys At Low Temperatures, Donald E. Higgins
Historical Dissertations & Theses
Although the determination of the strength of metals and alloys at ordinary temperatures is an everyday matter, very little work has been done to determine their strength and elasticity at very low temperatures. Mallock and Schaefer have investigated certain metals at the temperature of liquid air, and have deduced formulae to express the relation between elasticity and temperature, while Andrade has given an expression for the flow of metals under large constant stress. This work was intended in part to find out if their formulae would apply to the very light alloys used here. Another object was to find, if …
An Experimental Study Of The Cathode Fall In Helium And Argon With Wire Cathodes, L. G. Raub
An Experimental Study Of The Cathode Fall In Helium And Argon With Wire Cathodes, L. G. Raub
University Studies (University of Nebraska): Papers
It was recognized rather early in the study of the phenomena of discharge of electricity through gases that the ordinary laws of conduction as found in solid and liquid conductors are not applicable to gases. It was shown by Zeleny and independently by Child that Ohm's law by no means represents the distribution of potential between electrodes in an ionized gas, but that the potential gradient is large in the vicinity of the electrodes, and not uniform throughout the space between them. When the pressure of the gas surrounding the electrodes is reduced to one or two millimeters and a …
Die Grundlage Der Allgemeinen Relativitätstheorie, Albert Einstein, Leipzig : Verlag Von Johann Ambrosious Barth
Die Grundlage Der Allgemeinen Relativitätstheorie, Albert Einstein, Leipzig : Verlag Von Johann Ambrosious Barth
Before the Textbook
Albert Einstein's first exposition on the theory of relativity first printed in the journal "Annalen der Physik" Band 49, 1916.
Iii. Phase Change By Reflection – Primarily In The Ultra-Violet, Oliver Gish
Iii. Phase Change By Reflection – Primarily In The Ultra-Violet, Oliver Gish
Department of Physics and Astronomy: Faculty Publications
The first quantitative investigation of absolute phase change was made by Quinckel in 1872. This was followed by that of Wernicke, Wiener, Glan, Hennig, Drude, Koenigsberger and Bender. All these investigations were confined to the visible spectrum except that of Koenigsberger and Bender, who, in addition, measured for a few substances the phase change in the infra-red. So far no measurements of this phenomenon have been made in the ultra-violet.
Electric Double-Refraction In Carbon Disulphide At Low Potentials, Gustaf W. Elmen
Electric Double-Refraction In Carbon Disulphide At Low Potentials, Gustaf W. Elmen
University Studies (University of Nebraska): Papers
When light polarized at an angle of forty-five degrees to the lines of force is passed through certain dielectrics, between two parallel electrodes, they become double-refracting. The difference of phase, delta, between the two components of light at right angles and parallel to the lines of force, as represented by Kerr and verified by later investigators, is
δ = ± BP2l/a2
where B is the electro-optic constant, depending on, the dielectric, I the length, and a the distance between the plate' electrodes in centimeters, and P the difference of potential between the electrodes in C.G.S. units.
From …
The Graphical Representation Of Magnetic Theories, Harold N. Allen
The Graphical Representation Of Magnetic Theories, Harold N. Allen
Department of Physics and Astronomy: Dissertations, Theses, and Student Research
The induction theory of magnetism, introduced by Faraday, is now looked upon by all physicists as correct. The older theory which assumes the existence of magnetic fluids covering the ends of the magnet is in some cases mathematically simpler, and is for this reason often made use of. This, however, is apt to breed confusion as to the true nature of the induction or polarization in any given case. The difficulty Tyndall experienced in accepting Faraday's views as to diamagnetism, is accounted for by the fact that he was thinking in terms of the fluid theory, while Faraday was considering …
Some Experiments In Molecular Contact, James S. Stevens
Some Experiments In Molecular Contact, James S. Stevens
Physics and Astronomy Faculty Scholarship
In working with an interferometer it was observed that one could slide the brass plate which carries the movable mirror along the bed upon which it lies so that the fringes would suffer displacement for a small but definite amount, and that when the plate was released they would return to their original position. The idea occurred to me that it might be possible to measure these displacements for given weights applied to move the mirror-plate, and ascertain if they followed any law, and what relation these experiments bore to the ordinary experiments for finding the coefficients of friction.
The Effect Of Magnetization Upon The Elasticity Of Rods, J. S. Stevens, H. G. Dorsey
The Effect Of Magnetization Upon The Elasticity Of Rods, J. S. Stevens, H. G. Dorsey
Physics and Astronomy Faculty Scholarship
In the Physical Review, Vol. II, No. 4 and Vol. III., No. 6, is described a series of important experiments which show the relation between temperature and elasticity in wire. In one of the papers the statement was made that the results seem to indicate that the magnetizing effect of the current through the wire increases the modulus of elasticity. The increase in temperature in the wire was produced by sending a current directly through it, and also by sending a current through the helix that surrounded it. The author stated that "the magnetization produced by the first method had …
A Determination Of The Modulus Of Elasticity For Small Loads, Charles P. Weston
A Determination Of The Modulus Of Elasticity For Small Loads, Charles P. Weston
Physics and Astronomy Faculty Scholarship
"At the suggestion of Professor James S. Stevens, and under his supervision, I undertook to apply interference methods of measurement to an experimental determination of Young's modulus for copper, brass, and steel. The metals were in the form of bars, 66 cm x 1 cm x 0.5 cm (approximate dimensions). The general method followed was the so-called "method of flexure" in which a bar, supported at each end on knife edges, if deflected by a weight applied at the center,
An Application Of Interference Mmthods To A Study Of The Changes Produced In Metals By Magnetization, J. S. Stevens
An Application Of Interference Mmthods To A Study Of The Changes Produced In Metals By Magnetization, J. S. Stevens
Physics and Astronomy Faculty Scholarship
Problems which have for their object a study of the changes produced in metals when magnetized have, during the past fifty years, received attention from physicists. It is thought that if a thorough investigation of the subject could be made, much light would be thrown upon the phenomenon of magnetization, and even the theory of the constitution of matter. Historical notes relating to this problem may be found in the Physical Review, Vol. III, No. 15, and Vol. V., No. 5. The results of various investigators agree fairly well as to the maximum elongation of a rod or wire when …
Some Contributions Of Pure Math To Science, Herbert B.E. Case
Some Contributions Of Pure Math To Science, Herbert B.E. Case
Student and Lippitt Prize Essays
An examination of the connection between math and science through discoveries in the subjects of astronomy, mechanics, physics and chemistry.
The Spectroscope In Celestial Physics, S. A. Harker
The Spectroscope In Celestial Physics, S. A. Harker
Manuscript Thesis Collection
No abstract provided.
Self‐Consistent Electronic Structure Of Disordered Fe0.65ni0.35, Duane D. Johnson, F. J. Pinski, G. M. Stocks
Self‐Consistent Electronic Structure Of Disordered Fe0.65ni0.35, Duane D. Johnson, F. J. Pinski, G. M. Stocks
Duane D. Johnson
We present the results of the first a b i n i t i o calculation of the electronic structure of the disordered alloy Fe0.65Ni0.35. The calculation is based on the multiple‐scattering coherent‐potential approach (KKR‐CPA) and is fully self‐consistent and spin polarized. Magnetic effects are included within local‐spin‐density functional theory using the exchange‐correlation function of Vosko–Wilk–Nusair. The most striking feature of the calculation is that electrons of different spins experience different degrees of disorder. The minority spin electrons see a very large disorder, whereas the majority spin electrons see little disorder. Consequently, the minority spin density of states is smooth …
Studying Properties Of Xenon Doped Argon And Developing Optical Simulation Techniques For The Legend Collaboration, A Neutrinoless Double Beta Decay Experiment, Neil Christopher Mcfadden Dr
Studying Properties Of Xenon Doped Argon And Developing Optical Simulation Techniques For The Legend Collaboration, A Neutrinoless Double Beta Decay Experiment, Neil Christopher Mcfadden Dr
Physics & Astronomy ETDs
Neutrinoless double beta decay is a hypothesized lepton-number-violating process in which two neutrons decay to two protons, producing two electrons but no electron antineutrinos. The LEGEND collaboration will search for this decay in 76Ge. To improve the argon active veto for LEGEND-1000, xenon doped argon was explored as an alternative active volume. Simulations using argon doped with 10 ppm xenon and pure liquid argon were used to predict the light yield from cosmic muons in a 100 liter cryogenic vessel. The simulations predicted that xenon doping would yield 1.83+/-0.02 more light, while an increase of 1.81+/-0.05 was measured. From …