Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Computer Sciences (16295)
- Chemistry (12829)
- Environmental Sciences (10011)
- Earth Sciences (9329)
- Physics (8067)
-
- Engineering (7738)
- Mathematics (6288)
- Life Sciences (5734)
- Geology (5395)
- Oceanography and Atmospheric Sciences and Meteorology (4145)
- Statistics and Probability (3780)
- Social and Behavioral Sciences (3374)
- Applied Mathematics (2366)
- Medicine and Health Sciences (1971)
- Artificial Intelligence and Robotics (1892)
- Electrical and Computer Engineering (1738)
- Databases and Information Systems (1614)
- Natural Resources and Conservation (1447)
- Computer Engineering (1442)
- Organic Chemistry (1442)
- Oceanography (1437)
- Civil and Environmental Engineering (1405)
- Astrophysics and Astronomy (1358)
- Water Resource Management (1341)
- Analytical Chemistry (1328)
- Materials Science and Engineering (1287)
- 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 (1689)
- University of Central Florida (1665)
- University of South Florida (1607)
- Missouri University of Science and Technology (1572)
- Western University (1483)
- 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 (1212)
- University of Nevada, Las Vegas (1177)
- New Jersey Institute of Technology (1167)
- University of New Mexico (992)
- University of Kentucky (984)
- Clemson University (930)
- California Polytechnic State University, San Luis Obispo (924)
- 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 (860)
- Machine Learning (582)
- Pure sciences (564)
- Applied sciences (518)
- Mathematics (497)
-
- Chemistry (415)
- Geology (374)
- Climate change (344)
- Deep learning (344)
- 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 (4195)
- 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 (1477)
- 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 (1212)
- 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 (865)
- 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 (456)
Articles 67831 - 67860 of 69093
Full-Text Articles in Physical Sciences and Mathematics
Thallium Dithizonate, Bruno Jaselskis
Thallium Dithizonate, Bruno Jaselskis
Honors Theses
Attempts to establish a useful dithizone method in the determination of thallous ion have been carried on at Union College by Snyder (19). Because the previous work had not produced satisfactory results and because in general thallous dithizonates have not been studied, the following work, under Dr. W. G Ewing’s guidance, was undertaken.
Preparation Of Vanillic Acid And Some Of Its Metallic Salts, Elaine A. Dittmar
Preparation Of Vanillic Acid And Some Of Its Metallic Salts, Elaine A. Dittmar
Bachelors’ Theses
Very little work has been done with vanillic acid and its derivatives since the time when the acid was first synthesized. There are usually good reasons why compounds showing such important properties as food preservatives have lain idle for over seventy-five years. It is of great. interest to know the reasons behind this idleness and also to attempt to prepare some of the derivatives heretofore unreported.
This is the purpose for which this thesis has been written; that a little more knowledge will be contributed to a relatively virgin field. Submitted are the preparation of vanillic acid and some of …
The Separation Of Ethylene Diamine, Morpholine, And M-Toluidine By Means Of Paper Chromatography, Domenick S. Bruno
The Separation Of Ethylene Diamine, Morpholine, And M-Toluidine By Means Of Paper Chromatography, Domenick S. Bruno
Bachelors’ Theses
"No other discovery has exerted as great an influence and widened the .field of investigation of the organic chemist as much as Tswett's discovery. or Chromatographic Adsorption Analysis 1n 1906".
In 1910 Tswett's comprehensive work "Chromophylls in the Plant and Animal World" was published. Tswett's fundamental experiments consisted or extracting the color from dried leaves with petroleum ether. He poured the extract through a compressed column or finely powdered calcium carbonate. The column was attached to a filter flask and the solution drawn through. He found that the apparently homogeneous pigment separated into colored bands along the column as the …
Collector-Depressant Equilibria In The Flotation Of Molybdenite, Robert Létrenne Andelin
Collector-Depressant Equilibria In The Flotation Of Molybdenite, Robert Létrenne Andelin
Theses and Dissertations
This dissertation presents the results of research on the flotation system potassium n-amyl xanthate - sodium sulfide - molybdenite. The purposes of the research were (1) to determine the theoretical collector-depressant equilibria conditions of this system necessary for the flotation or depression of molybdenite, (2) to ascertain the mechanism of adsorption or the collector potassium n-amyl xanthate and the depressant sodium sulfide on molybdenite, and (3) to calculate the standard free energy of adsorption on molybdenite of the collector and depressant in this system. To accomplish these purposes it was necessary to develop a satisfactory experimental method for the controlled …
Jade: Its Occurrences, Mineralogy, Geology, Uses And Technology, Robert L. Borton
Jade: Its Occurrences, Mineralogy, Geology, Uses And Technology, Robert L. Borton
Earth and Planetary Sciences ETDs
No abstract provided.
The Sedimentary Petrography Of The Oil And Gas Producing Horizons In Montana, Patrick J. Donahue
The Sedimentary Petrography Of The Oil And Gas Producing Horizons In Montana, Patrick J. Donahue
Bachelors Theses and Reports, 1928 - 1970
Montana is an excellent oil province, as oil and gas are produced from a wider range of beds in the geologic section than in any other district in the United States. (1,864) Commercial fields have been developed in Ordovician, Devonian, Mississippian, Pennsylvanian, Jurassic, Lower Cretaceous, and Upper Cretaceous. It is believed that by describing the physical characteristics of the producing horizons, and by placing this information in one compact volume, a better understanding of oil and gas occurrence in Montana may be gained.
The Accessory Minerals Of Some Granitic Rocks Of The Boulder Batholith, Robert T. Donahue
The Accessory Minerals Of Some Granitic Rocks Of The Boulder Batholith, Robert T. Donahue
Bachelors Theses and Reports, 1928 - 1970
Although the position of the Boulder batholith in space and time is well known, the modes of occurrence of various rock types and the inter-relationships between the petrographic types are not known in detail.
The Mechanical Production Of Zinc Dust, Charles A. Schroer
The Mechanical Production Of Zinc Dust, Charles A. Schroer
Bachelors Theses and Reports, 1928 - 1970
The object of this thesis is to produce zinc dust suitable for zinc leach purification, by direct application of a mechanical force on a stream of molten zinc.The project is a continuation of work done by Mr. D. S. Gleason, while working for his Master of Science degree in the spring of 1952.
Flotation Of Huebnerite, Henry Albright
Flotation Of Huebnerite, Henry Albright
Bachelors Theses and Reports, 1928 - 1970
The development of suitable beneficiation processes for treating domestic low-grade tungsten ores is a problem now facing the mineral industry. While we are now consuming more tungsten than normally because of the defense program, we are no longer able to import ores from the world's principal source, China. The problem then, is to increase our domestic production so as to acquire a greater degree of self-sufficiency.
Geological Problems At Kerr Dam Lake County, Montana, Roger C. Rice
Geological Problems At Kerr Dam Lake County, Montana, Roger C. Rice
Bachelors Theses and Reports, 1928 - 1970
With an increased demand for power in Montana and surrounding territory, there is a need for existing power installations to produce more hydro-electric power. Kerr Dam, Lake County, Montana has been one of the dams selected for added output.The existing dam and power house installation with its two hydro-electric was finished in 1938, and has been producing power ever since.
The Construction Of An X-Ray Camera, Emil Bazarnicki
The Construction Of An X-Ray Camera, Emil Bazarnicki
Bachelors Theses and Reports, 1928 - 1970
The major portion of the construction of the X-ray camera was performed in the machine shop of Montana School of Mines. However, some machine work had to be accomplished in the Butte High Machine Shop, as well as in the machine shop of the Anaconda Copper Mining Company.
Protective Refractory Coatings On Titanium Metal, Eugene F. Gibbs
Protective Refractory Coatings On Titanium Metal, Eugene F. Gibbs
Bachelors Theses and Reports, 1928 - 1970
The problem undertaken in this thesis concerns the development of a newer phase of metallurgy, namely the adaption of the strong, lightweight metal titanium to high-temperature uses. The primary objective of the investigation is to determine whether the application of refractory coatings to titanium will protect the metal from chemical reactions and corrosion at high temperatures.
The Birdie Mine Tungsten Deposit Butte Mining District, Silverbow County, Montana, Bernard A. Fahm
The Birdie Mine Tungsten Deposit Butte Mining District, Silverbow County, Montana, Bernard A. Fahm
Bachelors Theses and Reports, 1928 - 1970
The importance of tungsten has encouraged the search for minerals of this metal, and consequently new deposits have been discovered, and known deposits have been re-examined. Western Montana has rather widespread deposits if low-grade types are also considered. Many deposits were known long ago, but abandoned because the use of tungsten was still in its beginning stage and therefore little attention was given to this type of mineral.
The Effect Of Ferric Iron Upon The Current Efficiency And The Deposition Of Copper In The Electrowinning Of Copper From Copper Sulphate Solutions, James L. Owings
The Effect Of Ferric Iron Upon The Current Efficiency And The Deposition Of Copper In The Electrowinning Of Copper From Copper Sulphate Solutions, James L. Owings
Bachelors Theses and Reports, 1928 - 1970
In the hydrometallurgy of copper, probably the most widely used method for the precipitation of copper is by electrolysis using insoluble anodes. The process is similar in many respects to the electrolytic refining of copper; one of the main differences is the use of insoluble anodes in electrowinning as compared to the use of impure copper anodes in electrorefining. Impurities, however, are common to both processes. The nature of these impurities differ and the problem of purifying the electrolyte is also different.
Electrowinning Of Zinc By Mercury Cathode, Tor O. Notevarp
Electrowinning Of Zinc By Mercury Cathode, Tor O. Notevarp
Bachelors Theses and Reports, 1928 - 1970
The problem was the investigation of electrowinning of zinc by using a mercury cathode, employing a neutral solution of zinc sulphate and containing small amounts of zinc, in the order of ten grams zinc per liter and less. The purpose of this study was on the base of the laboratory experiments to investigate the operational data that might possibly be applied in practice or industry.
The Occurrence Of Molybdenite In The United States, Alaska, Canada, And Newfoundland, Richard W. Brummett
The Occurrence Of Molybdenite In The United States, Alaska, Canada, And Newfoundland, Richard W. Brummett
Bachelors Theses and Reports, 1928 - 1970
In this study of molybdenite and its occurrence, the published literature on 66 separate deposits was reviewed, summarized, and coordinated. The following descriptions are intended to point out the important features of molybdenite occurrences as described in the literature.
The Immersion Coating Of Indium Upon Magnesium From Sulphate Solutions Containing Flourides, John J. Harrington
The Immersion Coating Of Indium Upon Magnesium From Sulphate Solutions Containing Flourides, John J. Harrington
Bachelors Theses and Reports, 1928 - 1970
The thesis problem that will be discussed in this report is an investigation of a method of plating a coating of indium upon magnesium and magnesium alloys. The method used to accomplish the final results is the immersion process. It can be defined as the process of coating a metal with a second metal by immersing the first in a solution containing ions of the second.
Variation Of Induction And Hysteresis Curves For The Heusler Alloy, Cu2mna1, Ford W. Knight
Variation Of Induction And Hysteresis Curves For The Heusler Alloy, Cu2mna1, Ford W. Knight
Bachelors Theses and Reports, 1928 - 1970
The purpose of this investigation is to determine the fundamental magnetic characteristics of induction and hysteresis, for the alloy Cu2MnAl. This is a ternary, ferromagnetic Heusler alloy. The problem is not only to determine these characteristics for the alloy as-cast but to heat treat it and observe the manner in which different heat treatments affect these two fundamental magnetic characteristics.
The Mechanical Production Of Zinc Dust, Robert F. Payne
The Mechanical Production Of Zinc Dust, Robert F. Payne
Bachelors Theses and Reports, 1928 - 1970
It was the purpose of this investigation to delve further into the possibility of producing, by mechanical means, a zinc dust which might be suitable for the purification of zinc leach solution.
The Metallography Of Aluminum Casting Alloys, Donald D. Goehler
The Metallography Of Aluminum Casting Alloys, Donald D. Goehler
Bachelors Theses and Reports, 1928 - 1970
The purpose of this thesis is to supply the Montana School of Mines with an up to date source of information concerning the metallography of aluminum casting alloys. This thesis is designed as a continuing project. Ultimately, it is hoped that a catalog containing all the typical structures of aluminum casting alloys will develop.
The Effect Of Iron Upon The Electrowinning Of Copper With An Amalgam Electrode, John A. Alexander
The Effect Of Iron Upon The Electrowinning Of Copper With An Amalgam Electrode, John A. Alexander
Bachelors Theses and Reports, 1928 - 1970
Current commercial use of the mercury cathode cell is limited to two types of electrolytic sodium cells-the Castner cell and the Sorenson cell. Mercury as a cathode medium has also found application in polarographic analysis, a method of a simultaneous quantitative and qualitative analysis of several metal components of solution.
An Investigation Of The Hardening Properties Of Some Alpha Copper Indium Alloys, Charles W. Mcpherson
An Investigation Of The Hardening Properties Of Some Alpha Copper Indium Alloys, Charles W. Mcpherson
Bachelors Theses and Reports, 1928 - 1970
Precipitation hardening alloys has assumed a major role in modern day development of alloys. In his search for stronger, harder materials, the metallurgist has often been limited by the cost of metals which posses the needed properties.
Electroplating Of Chromium, Nickel And Copper Upon Titanium, Stanley O. Fong
Electroplating Of Chromium, Nickel And Copper Upon Titanium, Stanley O. Fong
Bachelors Theses and Reports, 1928 - 1970
Recently, there has been a great amount of research work done on the metal titanium. Since it is a light weight metal, with unusual strength and good resistance to corrosion, it may be a possible substitute for aluminum and magnesium alloys, or steel.
The Study Of An Unusual Augite Near Cabezon Peak, Sandoval County, New Mexico, George Brunton
The Study Of An Unusual Augite Near Cabezon Peak, Sandoval County, New Mexico, George Brunton
Earth and Planetary Sciences ETDs
When the writer was examining some of the volcanic plugs near Cabezon, New Mexico in the spring of 1951, he discovered in Plug No. 5 (Pl. 2, D.W. Johnson, 1907) some unusual, large vitreous inclusions.
Geology Of The Sierra De Santa Rita, Zacatecas, Mexico, Zoltan Decserna
Geology Of The Sierra De Santa Rita, Zacatecas, Mexico, Zoltan Decserna
Earth and Planetary Sciences ETDs
Information concerning the southern extent of the Mexican geosyncline was desired with the mapping of Sierra de Santa Rita, near Concepción del Oro, Zacatecas, in northern Mexico. Three Upper Jurassic and six Cretaceous formations were mapped, within which lithology and changes in thickness do not reflect proximity of this area to ancient shore lines. The first description of the Huizachal formation in northern Zacatecas is given.
The Preparation, Properties And Reactions Of B-Diethylaminoethoxy-Methylsilanes, Edward G. Tajkowski
The Preparation, Properties And Reactions Of B-Diethylaminoethoxy-Methylsilanes, Edward G. Tajkowski
Honors Theses
In the course of work on the application of silicones to textiles and paper, chiefly to impart water repellency thereby, it has been found that the most desirable method for industrial operations is from water solution. Methods for preparing emulsions of silicones have been developed and such materials are available commercially. However, it would still be of interest to obtain a material which is directly water soluble and which is either a silicone itself, or can be simply and easily converted to a silicone in situ.
These facts were brought out by Dr. D. P. Spalding (1) in a discussion …
The Effects Of Ph And Salts On The Viscosity Of Gelatin Sol (The Hofmeister Series), Frank Z. Pollara
The Effects Of Ph And Salts On The Viscosity Of Gelatin Sol (The Hofmeister Series), Frank Z. Pollara
Honors Theses
The purpose ot this investigation was to accurately determine the effect of monovalent sodium salts on the viscosity of gelatin sol as a function of pH and to establish the Hofmeister series by this method.
The gelatin investigated was derived from pigskin and the salts used were NaCl, NaNO3, and NaI, of various concentrations. In order to justify and make reasonable the conclusions reached in this investigation, these conclusions must be viewed in the light of the work previously done by other investigators of this field.
With this in mind, a short historical survey of the origin and development of …
The Solution Of Boundary Value Problems By Use Of The Laplace Transformation As Compared With Classical Methods, Dan W. Stoddard
The Solution Of Boundary Value Problems By Use Of The Laplace Transformation As Compared With Classical Methods, Dan W. Stoddard
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The purpose of this paper is to present a study of different methods of solving certain boundary value problems. In particular it will be concerned with solutions by classical methods and by operational methods. Of the various operational methods that may be considered, the Laplace transformation appears to be the best(1) and will be used in this paper.
In the 1951 Encyclopedia Americana Annual is this report on the activities in applied mathematics for the previous year:
Progress was made on the general problem of finding the eigenvalues of matrices and systems of differential equations. Considerable effort was also …
Some Effects Of Fluctuating And Falling Water Levels On Waterfowl Production, Kenneth E. Wolf
Some Effects Of Fluctuating And Falling Water Levels On Waterfowl Production, Kenneth E. Wolf
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
There are today many areas and types of water storage. The uses to which these are put are many, and the prospect for the future can only be that there will be an increase in the number of these reservoirs. These areas are usually operated with regard only for power production, irrigation, or storage, but there is a growing concern about the effects on wildlife which this type of operation may have. Fluctuating water levels, and falling water levels are not restricted to man-made impoundments tut are characteristic of many of then. Biologists have observed that these variations in water …
The Content Of Pantothenic Acid, Folic Acid And Vitamin B12 Like-Activity In Alfalfa Hay Grown In Utah Soils Treated With Different Fertilizers, Buranaphoka Kashemsri
The Content Of Pantothenic Acid, Folic Acid And Vitamin B12 Like-Activity In Alfalfa Hay Grown In Utah Soils Treated With Different Fertilizers, Buranaphoka Kashemsri
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Vitamins play an important role in the nutrition of man and animal. As early as 1897 Eijkman was able to demonstrate the symptoms of thiamine deficiency disease in birds. Since then, vitamins have been regarded as one of the most essential factors in nutrition. Only small quantities in the diet are necessary, yet lack of any of them will inhibit the growth and produce certain kinds of deficiency diseases.