Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Computer Sciences (16288)
- Chemistry (12826)
- Environmental Sciences (10005)
- Earth Sciences (9328)
- Physics (8062)
-
- Engineering (7733)
- Mathematics (6286)
- Life Sciences (5732)
- Geology (5395)
- Oceanography and Atmospheric Sciences and Meteorology (4145)
- Statistics and Probability (3780)
- Social and Behavioral Sciences (3371)
- Applied Mathematics (2365)
- Medicine and Health Sciences (1971)
- Artificial Intelligence and Robotics (1888)
- Electrical and Computer Engineering (1738)
- Databases and Information Systems (1613)
- Natural Resources and Conservation (1446)
- Computer Engineering (1442)
- Organic Chemistry (1442)
- Oceanography (1437)
- Civil and Environmental Engineering (1404)
- Astrophysics and Astronomy (1356)
- Water Resource Management (1341)
- Analytical Chemistry (1326)
- Materials Science and Engineering (1286)
- Geophysics and Seismology (1280)
- Business (1252)
- Sustainability (1245)
- Institution
-
- Louisiana State University (2591)
- Air Force Institute of Technology (2216)
- William & Mary (1952)
- Utah State University (1884)
- Brigham Young University (1867)
-
- University of Tennessee, Knoxville (1759)
- Old Dominion University (1683)
- University of Central Florida (1665)
- University of South Florida (1607)
- Missouri University of Science and Technology (1572)
- Western University (1482)
- University of Texas at Arlington (1423)
- Western Michigan University (1407)
- Chulalongkorn University (1330)
- University of Arkansas, Fayetteville (1326)
- Portland State University (1232)
- University of Texas at El Paso (1211)
- University of Nevada, Las Vegas (1177)
- New Jersey Institute of Technology (1167)
- University of New Mexico (990)
- University of Kentucky (984)
- Clemson University (930)
- California Polytechnic State University, San Luis Obispo (923)
- City University of New York (CUNY) (910)
- University at Albany, State University of New York (873)
- San Jose State University (872)
- University of Wisconsin Milwaukee (872)
- University of South Carolina (865)
- Nova Southeastern University (801)
- Wright State University (780)
- Keyword
-
- Machine learning (858)
- Machine Learning (581)
- Pure sciences (564)
- Applied sciences (518)
- Mathematics (497)
-
- Chemistry (415)
- Geology (374)
- Climate change (344)
- Deep learning (343)
- Computer Science (320)
- Statistics (318)
- Sustainability (308)
- Montana (283)
- Optimization (280)
- Simulation (264)
- Physics (257)
- Computer science (254)
- College for Professional Studies (253)
- Department of Computer Science and Engineering (243)
- Geochemistry (241)
- Remote sensing (238)
- Deep Learning (237)
- School of Computer & Information Science (236)
- Education (235)
- Algorithms (234)
- Nanoparticles (225)
- Modeling (223)
- Synthesis (221)
- Artificial intelligence (217)
- Security (214)
- Publication Year
- Publication
-
- Theses and Dissertations (8341)
- Electronic Theses and Dissertations (4194)
- Masters Theses (2631)
- Honors Theses (2058)
- Doctoral Dissertations (1882)
-
- Dissertations, Theses, and Masters Projects (1876)
- Dissertations (1736)
- USF Tampa Graduate Theses and Dissertations (1607)
- Electronic Thesis and Dissertation Repository (1476)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (1427)
- Chulalongkorn University Theses and Dissertations (Chula ETD) (1330)
- LSU Doctoral Dissertations (1256)
- Open Access Theses & Dissertations (1211)
- Dissertations and Theses (1186)
- UNLV Theses, Dissertations, Professional Papers, and Capstones (1170)
- Theses (1078)
- Graduate Theses and Dissertations (1072)
- LSU Master's Theses (1047)
- Master's Theses (864)
- Master's Projects (852)
- Browse all Theses and Dissertations (780)
- Walden Dissertations and Doctoral Studies (768)
- Dissertations, Theses, and Capstone Projects (707)
- Legacy Theses & Dissertations (2009 - 2024) (677)
- WWU Graduate School Collection (571)
- Wayne State University Dissertations (571)
- All Dissertations (512)
- CCE Theses and Dissertations (488)
- Theses Digitization Project (458)
- Graduate College Dissertations and Theses (455)
Articles 68791 - 68820 of 69073
Full-Text Articles in Physical Sciences and Mathematics
Precipitation Of Gold, Silver, And Copper From Cyanide Solutions On Activated Charcoal., Rayworth Francis Howe
Precipitation Of Gold, Silver, And Copper From Cyanide Solutions On Activated Charcoal., Rayworth Francis Howe
Bachelors Theses and Reports, 1928 - 1970
Charcoal has been known for a considerable length of time to have the property of recovering gold, silver, and copper from cyanide solutions of these metals. Quantitative data that may shed light on the mechanism of the removal of these metals is very limited except that charcoal in a form known as activated has the power to abstract gold and silver in considerable quantities from the above solutions.
Ammoniacal Sulphate Leach Of Ananconda Zinc Calcine Recovery Of The Zinc By Electrolysis., Authur Jewett Bovee Jr.
Ammoniacal Sulphate Leach Of Ananconda Zinc Calcine Recovery Of The Zinc By Electrolysis., Authur Jewett Bovee Jr.
Bachelors Theses and Reports, 1928 - 1970
Zinc is produced from ores by two general methods, distillation and electrolysis.
The general principles involved in the electrolytic zinc process of today were known as far back as 1880. Difficulties encountered in purifying the solution for electrolysis and lack of suitable mechanical apparatus were the main reasons that such a long time elapsed before the process was used to produce zinc in commercial quantities.
The Effect Of Impurities On The Electrodeposition Of Zinc From Zinc Sulfate Solution Containing Antimony., Emmitt L. Klebba
The Effect Of Impurities On The Electrodeposition Of Zinc From Zinc Sulfate Solution Containing Antimony., Emmitt L. Klebba
Bachelors Theses and Reports, 1928 - 1970
It has been proven by research and years of experience, that before electrolytic zinc is possible, the electrolyte, as zinc sulfate solution must be prepared as pure as is economical. In other words, the ideal electrolyte must only be a solution of one metal - zinc. Every other metal and carbon must be excluded if good recovery and a firm deposit is to be obtained.
Alloys Of Lead And Tellurium, Ettore A. Peretti
Alloys Of Lead And Tellurium, Ettore A. Peretti
Bachelors Theses and Reports, 1928 - 1970
Prior to the last few years little practical use was made of the element tellurium, which is obtained from gold and silver tellurides and from the slimes of electrolytic copper refineries. Lately, however, more study has been made of its properties when alloyed with other metals. It was the purpose of this thesis to study the effects of the addition of tellurium to lead, particularly in small amounts.
Conodonts From The Quadrant Shales Of Montana, Don R. Cubbage
Conodonts From The Quadrant Shales Of Montana, Don R. Cubbage
Bachelors Theses and Reports, 1928 - 1970
Conodonts have not been known to exist in Montana prior to the discovery of the specimens discussed and described in this paper. With this fact in mind, the author has endeavored to correlate the species of seven genera found in the Quadrant formation of Montana with similar micro-organisms from other North American areas.
Potentiometric Titration, S. Lillian Kern
Potentiometric Titration, S. Lillian Kern
Chemistry Honors Papers
This 27 page thesis contains a general description of the theory and technique of potentiometric titrations.
The Solution Of The Quartic Equation In One Variable, Beatrice Dwyer
The Solution Of The Quartic Equation In One Variable, Beatrice Dwyer
Bachelors’ Theses
The purpose of this thesis has been to give a brief account of the history of the quartic equation, to develop and illustrate the particular solutions of the quartic and the more important solutions of equations in general.
Three types of solutions have been considered the particular algebraic solutions for biquadratic, the graphical solution, and methods of approximation A brief discussion has been given concerning the nature of the roots and the discriminant of the quartic.
Pedal Curves, Walter V.S. Budny
Pedal Curves, Walter V.S. Budny
Bachelors’ Theses
The Pedal Curve may be defined as the locus of the intersection of the tangent at any point on a base curve with a perpendicular from a fixed point P to that tangent.
A Contribution To The Preparation Of Synthetic Rubber From Butadiene. Ii., Joseph Patrick Iding
A Contribution To The Preparation Of Synthetic Rubber From Butadiene. Ii., Joseph Patrick Iding
Bachelors’ Theses
Since the World War, the production of synthetic rubber has become the problem not only of the laboratory, but of commerce as well. Several factors demanded this research.
In the first place, the World War made the dependence of countries on each other strikingly evident in several ways, one of which was the need for rubber by great nations whose situations prohibited the planting of the rubber tree and consequently put them under obligation to other countries for their supply.
And now in the last few years this demand for rubber has been increased enormously, through the increased production of …
A Method Of Determining The Relative Thermal Conductivities Of Liquids, Lohr Arthur Burkardt
A Method Of Determining The Relative Thermal Conductivities Of Liquids, Lohr Arthur Burkardt
Bachelors’ Theses
This thesis concerns the development of apparatus suitable for the practical determination of the thermal conductivity of liquids. The data presented in the literature refers to the determination of absolute conductivity values and-is very unsatisfactory from a practical point of view. The aim here has not been to furnish absolute data, but to provide a simple means of determining the relative conductivity of any series of liquids. Knowing such a set of relative conductivities, absolute values can readily be calculated therefrom.
The aim has been to develop an apparatus that is simple enough to be constructed in the ordinary laboratory, …
Roasting And Leaching Bulk Copper-Zinc Sulfide Concentrates With The Subsequent Recovery Of The Metals By Electrolysis, Carl Wesley Sawyer
Roasting And Leaching Bulk Copper-Zinc Sulfide Concentrates With The Subsequent Recovery Of The Metals By Electrolysis, Carl Wesley Sawyer
Bachelors Theses and Reports, 1928 - 1970
The aim of this research was to investigate the possibilities of roasting and leaching a bulk copper-zinc sulfide concentrate, and the subsequent separation of the metals from the leach solution by electrolytic deposition.
Certain Transformations Of The Apollonion Circles On The Triangle 1,W, And W2, Marion J. Kaminski
Certain Transformations Of The Apollonion Circles On The Triangle 1,W, And W2, Marion J. Kaminski
Master's Theses
No abstract provided.
The Equilibrium Relations Of Nickel Sulfide With Copper And Sodium Sulfides, Walter A. Hamilton
The Equilibrium Relations Of Nickel Sulfide With Copper And Sodium Sulfides, Walter A. Hamilton
Bachelors Theses and Reports, 1928 - 1970
The equilibrium relations of many of the metallic sulfides have long been a source of scientific and commercial interest, of particular interest, are the sulfides of nickel and copper, since the economic recovery of both of these useful metals, from their ores, involves the formation of a sulfide at some stage of the operations.
Effect Of Manganese And Arsenic Upon Current Efficiency In The Deposition Of Zinc From Zinc Sulphate Solution, Justin Kelly
Effect Of Manganese And Arsenic Upon Current Efficiency In The Deposition Of Zinc From Zinc Sulphate Solution, Justin Kelly
Bachelors Theses and Reports, 1928 - 1970
Throughout the entire experiment the electrolysis were conducted in an eight-hundred cubic centimeter beaker. An excellent circulation of the solution was assured by means of an electric stirrer, vigorous gas evolution from the anodes, and by means of a regulated feed-discharge system. By means of this balance, solution of the same impurity concentration as that of the electrolyte was fed in the cell just as fast as the discharge was syphoned out.
Butyl And Ethanol Ethers Of The Ortho, Meta And Para Xenols., Mary Agatha O'Neill
Butyl And Ethanol Ethers Of The Ortho, Meta And Para Xenols., Mary Agatha O'Neill
Electronic Theses and Dissertations
No abstract provided.
Practical Vacuum Drying Theory., John W. Ridgway
Practical Vacuum Drying Theory., John W. Ridgway
Electronic Theses and Dissertations
No abstract provided.
The Production Of Oxalic, Citric, And Gluconic Acids From Plantation Molasses, John A. Ruth
The Production Of Oxalic, Citric, And Gluconic Acids From Plantation Molasses, John A. Ruth
University of the Pacific Theses and Dissertations
This research was undertaken for the purpose of developing a process for producing citric and gluconic acids from plantation molasses.
There is an evident need for such a process. At the present time, these acids are being produced by processes in which refined sugar is the principal raw material. If molasses could be used in place of refined sugar, the cost of raw materials would be reduced by approximately ninety percent. In addition, a waste product would be utilized.
The scope of this problem is very broad. Its solution will involve the solving of many problems of widely varying natures. …
Titanous Chloride As A Standard Reducing Agent, Alfred R. Armstrong
Titanous Chloride As A Standard Reducing Agent, Alfred R. Armstrong
Dissertations, Theses, and Masters Projects
No abstract provided.
A Study On The Liesegang Phenomenon, Earl Francis Rothemich
A Study On The Liesegang Phenomenon, Earl Francis Rothemich
Honors Theses
This work is a continuation of an attempt to explain the Liesegang Phenomenon by using probing electrodes inside the gel. A study of what happens as one salt diffuses into a gel containing another salt with the precipitation of the reaction product in the gel, as well as the case of diffusion of a salt into a gel containing a small amount as the same salt has been made.
By the use of the probing electrodes it is possible to actually get inside the gel and in this manner observe how the concentration of the salt in the gel changes …
A Study Of The Effect Of Quinhydrone On The Time Of Set Of Silicic Acid Gells And Of The Effect Of Silicic Acid Gel On The Determination Of Ph By The Quinhydrone Electrode, James E. Malone
Honors Theses
The studies discussed in this report are supplementary to the work being done at Union College on silicic acid gels. In as much data has been taken in this work using pH as determined by the quinhydrone electrode, it was desired that a study be made of the effect of quinhydrone on the gel and of gel on the quinhydrone determinations. The pH of gels during their setting has been worked on and the first part of the experiment deals with the effect of quinhydrone on the time of set of silicic acid gel. Then it was desired to know …
The Thermal Dissociation Of Lithium Hydride, Benjamin M. Walker
The Thermal Dissociation Of Lithium Hydride, Benjamin M. Walker
Honors Theses
In previous work at the Union College laboratory a method was finally developed which overcame the difficulties of the earlier studies of calcium-hydrogen equilibrium. The results obtained were in good agreement with the best work of other investigators. In the present work, an attempt was made to extend this method to a study of the lithium-hydrogen equilibrium.
Precipitations In Gels, Bernard Freeman
Precipitations In Gels, Bernard Freeman
Honors Theses
Numerous investigations of reactions in gels have been conducted since Liesegang’s1 discovery, in 1896, of the periodic nature of silver chromate. Liesegang obtained rhythmic bands by the diffusion of silver nitrate in a gel containing K2Cr2O7.
A Study Of The Velocity Of Ions In Silica Gels When Under The Influence Of A Potential, John Galaba
A Study Of The Velocity Of Ions In Silica Gels When Under The Influence Of A Potential, John Galaba
Honors Theses
There is speculation among chemists as to the structure of gels. In an effort to get information on this subject, chemists have studied the properties of and reactions in gels. The results have led to conflicting theories. This work measuring the velocity of ions in silica gel has been done in the hope that it may add to the knowledge of the behavior of gels and furnish a further clue towards the correct structure of silica gels.
A Brief Study Of The Cherokee Formation Outcrop In Kansas, Roland G. Holmes
A Brief Study Of The Cherokee Formation Outcrop In Kansas, Roland G. Holmes
Electronic Theses & Dissertations
The Cherokee formation is one of the important rock formations of Kansas. There has been much work done upon the coal beds of this formation but so far as is shown by a search of the available literature, there has been no work carried on making a study of the rock beds of the formation by means of chemical analysis.
This paper is an endeavour to do three things: (1) to make a brief study of the rocks of the Cherokee formation at various horizons, (2) to attempt to show by chemical analysis the position of the land mass from …
Leaching Copper Minerals In The Butte District, Kenneth C. Bellows
Leaching Copper Minerals In The Butte District, Kenneth C. Bellows
Bachelors Theses and Reports, 1928 - 1970
The history of mining in Butte is woven about three of our principal metals. The gold placers first attracted the attention of miners in 1863, and reached their peak production in 1867. Silver was the second metal mined, and this operation required the erection of large mills with a consequent increase in mining activity that made the district a prominent producer. Although the presence of copper in the silver ore had been known, the credit for the first development of the copper veins is due Senator W. A. Clark. The original Colusa, Mining Chief, and Gambetta claims were developed to …
A Study Of Montana Bentonite, William P. Ryan
A Study Of Montana Bentonite, William P. Ryan
Bachelors Theses and Reports, 1928 - 1970
Research has been undertaken both under Government and private auspices in an endeavor to develop uses for bentonite. Perhaps, the work done to date has had only in consideration the possible industrial importance of bentonite. No simple, quick methods for the determination of the properties or qualities of any particular bentonite have been developed.
In an attempt to establish whether or not there is a means of making rapid simple determinations of the quality of Montana bentonitic clays, and in particular, with regard to the uses to which the clays may be suited. The problem also involves a study of …
The Calcite Veins Of The Livingston Formation, John Moore Conrow
The Calcite Veins Of The Livingston Formation, John Moore Conrow
Bachelors Theses and Reports, 1928 - 1970
An interesting group of calcite veins occur near Livingston Montana in a zone about eight miles wide and forty miles long in the edge of the Plains region of Montana in front of the Main ranges. The zone extends from the Boulder River south of Big Timber, through Springdale and Hunters Hot Springs, to Potter's Basin just north of Wilsall in Park County. The group of veins is particularly interesting because they cut relatively flat lying strata, suggest a structural relationship to one another, and they are nearly pure calcite.
The present investigation was to determine the position of the …
A Microscopic Study Of Some Volcanic Rocks In The Vicinity Of Butte, Evan Gustafson
A Microscopic Study Of Some Volcanic Rocks In The Vicinity Of Butte, Evan Gustafson
Bachelors Theses and Reports, 1928 - 1970
The rhyolite rocks in the vicinity of Big Butte present a very interesting, though complicated study. It seems that no extensive or conclusive work has ever been done upon these extrusives.
I have found that the rhyolites present a very interesting problem, especially microscopically, and that no doubt an intensive study along these lines will solve the problems concerning age relations of different flows and origin of the magma that produced the material for emanations.
Methods Of Obtaining Asymptotes, Paul Sweetland
Methods Of Obtaining Asymptotes, Paul Sweetland
Master's Theses
The purpose of this thesis is to present in logical order the more important methods of obtaining asymptotes. In several cases where two or more different methods for obtaining the same type of asymptotes were found the simpler method is given first and then the more difficult method. Most of the simpler methods are based on Analytic Geometry, while the more difficult are based on the Calculus.
Effect Of Impurities Upon Current Efficiency In The Electrolysis Of Zinc Sulphate Solution, Robert Jess Smith
Effect Of Impurities Upon Current Efficiency In The Electrolysis Of Zinc Sulphate Solution, Robert Jess Smith
Bachelors Theses and Reports, 1928 - 1970
There are many elements which are detrimental to the current efficiency in the electrolysis of zinc sulphate solution. Fortunately the majority of these elements are easily removed in the purification process and cause no further trouble. The elements that are likely to cause trouble in ordinary plant operations are antimony, arsenic, cobalt, nickel, manganese and germanium. The following tests were made to determine the mutual effect on the current efficiency when several of the impurities were present in the electrolyte.