Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Earth Sciences (58733)
- Computer Sciences (57951)
- Environmental Sciences (52381)
- Engineering (40236)
- Life Sciences (39776)
-
- Physics (36527)
- Chemistry (34521)
- Geology (29715)
- Mathematics (27382)
- Social and Behavioral Sciences (24565)
- Oceanography and Atmospheric Sciences and Meteorology (16422)
- Statistics and Probability (13260)
- Computer Engineering (12809)
- Education (12808)
- Soil Science (11977)
- Medicine and Health Sciences (11799)
- Plant Sciences (11182)
- Natural Resources and Conservation (10267)
- Arts and Humanities (9726)
- Astrophysics and Astronomy (9206)
- Electrical and Computer Engineering (8897)
- Sustainability (8693)
- Natural Resources Management and Policy (8567)
- Artificial Intelligence and Robotics (8513)
- Water Resource Management (8291)
- Applied Mathematics (7991)
- Environmental Health and Protection (6879)
- Science and Mathematics Education (6761)
- Databases and Information Systems (6720)
- Institution
-
- University of Nebraska - Lincoln (24230)
- Western Michigan University (19508)
- Selected Works (16838)
- University of Kentucky (12002)
- TÜBİTAK (10317)
-
- Singapore Management University (7453)
- Utah State University (7340)
- Missouri University of Science and Technology (6056)
- Old Dominion University (5954)
- University of Wollongong (4868)
- William & Mary (4602)
- University of South Florida (3859)
- Wright State University (3840)
- Portland State University (3798)
- University of Nevada, Las Vegas (3640)
- Louisiana State University (3417)
- China Simulation Federation (3382)
- City University of New York (CUNY) (3219)
- Brigham Young University (2906)
- Purdue University (2813)
- Air Force Institute of Technology (2678)
- Claremont Colleges (2640)
- California Polytechnic State University, San Luis Obispo (2568)
- Western Washington University (2456)
- University of Arkansas, Fayetteville (2433)
- University of Texas Rio Grande Valley (2419)
- Department of Primary Industries and Regional Development, Western Australia (2354)
- University of Texas at El Paso (2316)
- Chinese Chemical Society | Xiamen University (2294)
- Chulalongkorn University (2268)
- Keyword
-
- Machine learning (1689)
- Climate change (1680)
- Western Australia (1581)
- Mathematics (1369)
- Chemistry (1157)
-
- Sustainability (1141)
- Physics (1068)
- Water quality (983)
- Deep learning (892)
- Geology (858)
- Groundwater (851)
- Machine Learning (829)
- Simulation (824)
- Research and Technical Reports (797)
- Water (780)
- United States (759)
- Education (756)
- Management (746)
- Nebraska (744)
- Agriculture (718)
- Artificial intelligence (707)
- Climate (702)
- GIS (699)
- Statistics (685)
- Security (681)
- Grains and field crops (674)
- Environment (672)
- Computer Science (667)
- Ecology (658)
- Optimization (656)
- Publication Year
-
- 2024 (7893)
- 2023 (12583)
- 2022 (18310)
- 2021 (27882)
- 2020 (15207)
-
- 2019 (15927)
- 2018 (13646)
- 2017 (12521)
- 2016 (12690)
- 2015 (12617)
- 2014 (12299)
- 2013 (11462)
- 2012 (12196)
- 2011 (10325)
- 2010 (8621)
- 2009 (7616)
- 2008 (7321)
- 2007 (6758)
- 2006 (5872)
- 2005 (5573)
- 2004 (4447)
- 2003 (3876)
- 2002 (3435)
- 2001 (3030)
- 2000 (2919)
- 1999 (2555)
- 1998 (2574)
- 1997 (2472)
- 1996 (2437)
- 1995 (2193)
- Publication
-
- Legacy Scout Tickets from Pure Oil Company (11044)
- Theses and Dissertations (8341)
- IGC Proceedings (1993-2023) (7001)
- Research Collection School Of Computing and Information Systems (6891)
- Thin Sections (5745)
-
- Electronic Theses and Dissertations (4195)
- Faculty Publications (3796)
- Journal of System Simulation (3382)
- Nebraska Tractor Tests (3348)
- Turkish Journal of Electrical Engineering and Computer Sciences (3020)
- Masters Theses (2634)
- Turkish Journal of Chemistry (2628)
- Turkish Journal of Mathematics (2494)
- Journal of Electrochemistry (2294)
- Honors Theses (2158)
- Faculty of Informatics - Papers (Archive) (2013)
- Physics Faculty Publications (1942)
- Bulletin of the Mineral Research and Exploration (1893)
- Doctoral Dissertations (1882)
- Dissertations, Theses, and Masters Projects (1876)
- Reports (1835)
- Dissertations (1816)
- Physics Faculty Research & Creative Works (1762)
- Department of Computer Science Technical Reports (1721)
- USF Tampa Graduate Theses and Dissertations (1607)
- School of Natural Resources: Faculty Publications (1586)
- United States Department of Agriculture Wildlife Services: Staff Publications (1529)
- Australian Institute for Innovative Materials - Papers (1524)
- Electronic Thesis and Dissertation Repository (1476)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (1427)
- Publication Type
Articles 301231 - 301260 of 302576
Full-Text Articles in Physical Sciences and Mathematics
A Measurement Of The Extent Of The Color-Sensitive Areas Of The Retina And Of The Wavelengths Of Light Stimulating The Respective Receptor Mechanisms, Charles A. Rinde
A Measurement Of The Extent Of The Color-Sensitive Areas Of The Retina And Of The Wavelengths Of Light Stimulating The Respective Receptor Mechanisms, Charles A. Rinde
University of the Pacific Theses and Dissertations
The interest of the writer was directed toward the phenomena of color vision in 1927 as a result of attending concurrently two courses in the University of California touching upon the subject, but treating it quite differently with results far from mutually consistent. Prof. R. S. Minor, in his course on physical optics, discussed color vision from the physicist’s standpoint, making use of the Young-Helmholtz theory; while Prof. G. M. Stratton gave the psychological treatment, based upon the Ladd-Franklin theory, as a part of his general psychology. Several of the more obviously points of conflict impressed the writer so strongly …
The Mandible Of Amebelodon Fricki, Erwin H. Barbour
The Mandible Of Amebelodon Fricki, Erwin H. Barbour
Bulletin of the University of Nebraska State Museum
The type specimen of the genus Amebelodon is installed in the Nebraska State Museum, the University of Nebraska, Lincoln. It consists of a mandible with tusks and teeth, all of which are dense and perfect, barring minor cracks and breaks. One toe bone and part of a rib found associated with this mandible may belong to this animal. It was discovered by Mr. A. S. Keith on his farm near Freedom, Frontier County, Nebraska; was secured for the palaeontological collections of Hon. Charles H. Morrill by Mr. Phillip Orr, April 4, 1927; was briefly described and figured in a Museum …
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 …
The Quantitative Analysis Of Sodium Acetate, Henry A. Budzinski
The Quantitative Analysis Of Sodium Acetate, Henry A. Budzinski
Bachelors’ Theses
There are many methods by which Sodium Acetate can be analysed for its purity. Each method is satisfactory and the results obtained vary only slightly. However, this essay is for the purpose of determining the method which is most suitable for all conditions, and setting this method as a standard.
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 Chromite Deposits Of Stillwater And Sweetgrass Counties, Montana, Uuno Sahinen
The Chromite Deposits Of Stillwater And Sweetgrass Counties, Montana, Uuno Sahinen
Bachelors Theses and Reports, 1928 - 1970
In writing this report, two objects were kept in mind, (1) to explain, if possible, the origin of the chromite deposits found in Sweetgrass and Stillwater Counties, and (2) to bring up to date all information on these deposits which had thus far been available.
The work done consisted of study of the rocks and ores of the area under the microscope, both as thin sections and as polished sections, practically all of which was done at the Montana State School of Mines, during the school year of 1928 - 1929.
The rock specimens and much information as to their …
The Cycloid, Some Related Curves And Their Derivation, Ann Downer
The Cycloid, Some Related Curves And Their Derivation, Ann Downer
Bachelors’ Theses
In studying the history of the cycloid and the related curves, it is interesting to note that the earliest notations and explanations were given not by a mathematician but by an artist. The description and instrumental construction of the epicycloid curve was presented in about 1525 by Albrecht Durer (1471-1528) a celebrated sculptor and painter of Nurnberg in his book "Underweysund der Messung mit dem Zyrkenund Rychtsceyd." The original idea, however, goes as far back as the time of Hipparchus, an astronomer, who used it in his astronomical theory of epicycles. This curve was now neglected until G. Desargues and …
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 …
Curve Tracing In Polar Coordinates, Virginia Higgins
Curve Tracing In Polar Coordinates, Virginia Higgins
Bachelors’ Theses
No abstract provided.
Quadratic Equations, Floyd George Hydar
Quadratic Equations, Floyd George Hydar
Bachelors’ Theses
In algebra, an equality which exists only for particular values of certain letters representing the unknown quantities is called an equation. These particular values are called the roots of the equation, and the determination of these roots is known as the solution of the equation.
The Cubic Equation In One Variable, Ella M. Horst
The Cubic Equation In One Variable, Ella M. Horst
Bachelors’ Theses
No abstract provided.
The Effect Of Carbon Dioxide Tension Upon The Ability Of Goldfish To Abosorb Oxygen At Low Tension, Thressa A. Hickman
The Effect Of Carbon Dioxide Tension Upon The Ability Of Goldfish To Abosorb Oxygen At Low Tension, Thressa A. Hickman
Masters Theses
Within recent years much has been contributed to our knowledge of the physiology of respiration. Van Slyke (1921) in a study of the carbon dioxide carriers of the blood concluded that hemoglobin is almost as completely responsible for the transport of CO2 in the blood as it is for the transport of oxygen. And that from 80% to 95%, sometimes possibly all, of the alkali furnished to neutralize the CO2 that enters the venous blood comes from the hemoglobin.
Powers (1922) found that species of marine fishes have an optimum pH of more or less wide range for …
A Study Of The Oxidation Of D-Glucose With Air In A Saturated Solution Of Barium Hydroxide, Clyde Wilson Eddy
A Study Of The Oxidation Of D-Glucose With Air In A Saturated Solution Of Barium Hydroxide, Clyde Wilson Eddy
Open Access Master's Theses (through 2010)
The conversion of one aldose into another aldose and several ketoses slowly by weak alkalis at ordinary temperatures and quickly with much decomposition at elevated temperatures, was first observed by Lobry de Bruyn and later investigated by Nef and his students in an elaborate study on the action of strong alkalis alone and with oxidizing agents extending over a period of ten years. The results of these studies on oxidation were interpreted as depending on the presence of several intermediate enediols. The oxidation of sugars in approximately six normal alkali medium with air or oxidizing agents all give about the …
Modern Geometry Of The Triangle, Irene Nolan
Modern Geometry Of The Triangle, Irene Nolan
Bachelors’ Theses
It has been the object of t he writer to present in this thesis theorems and proofs of modern geometry which seemed most useful and most interesting to her. Concepts of modern geometry have been presented and developed with reference to the triangle.
A Problem Involved In The Parkerizing Of Iron And Steel, Frank A. Harmer
A Problem Involved In The Parkerizing Of Iron And Steel, Frank A. Harmer
Bachelors’ Theses
The problem involved in the parkerizing of iron was presented by the National Lock Washer Company of Milwaukee, Wisconsin
Handbook Of Nebraska Trees, A Guide To The Native And Most Important Introduced Species, Raymond J. Pool
Handbook Of Nebraska Trees, A Guide To The Native And Most Important Introduced Species, Raymond J. Pool
Conservation and Survey Division
No abstract provided.
Tree Planting And Landscape Beautification In Nebraska, Condra G. E.
Tree Planting And Landscape Beautification In Nebraska, Condra G. E.
George E. Condra Publications
This bulletin is intended to further the planting of flowers, vines, shrubbery, and trees in Nebraska.
Tree Planting And Landscape Beautification In Nebraska, G. E. Condra
Tree Planting And Landscape Beautification In Nebraska, G. E. Condra
Conservation and Survey Division
No abstract provided.
Torynobelodon Loomisi, Gen Et. Sp. Nov., Erwin H. Barbour
Torynobelodon Loomisi, Gen Et. Sp. Nov., Erwin H. Barbour
Bulletin of the University of Nebraska State Museum
The group of proboscideans which we have called the shovel-tuskers or Amebelodonts, was announced in June, 1927,1 following the discovery of Amebelodon fricki. In the field season of 1928, two additional species were found which are represented by mandibular tusks. One of these is a tip of a large and unique tusk, numbered 2-3-9-28, S. and L., the collectors being Bertrand Schultz and John LeMar, both of the class of 1931, the University of Nebraska. It was found within 200 to 300 yards of the spot on his farm where Mr. A. S. Keith, Freedom, Frontier County, Nebraska, found …
Symmetric Functions Of N-Ic Residues (Mod P), T. A. Pierce
Symmetric Functions Of N-Ic Residues (Mod P), T. A. Pierce
Department of Mathematics: Faculty Publications
If p be an odd prime, q is said to be an n- ic residue of p if the congruence xn = q (mod p) has solutions; otherwise q is an n-ic non-residue of p. A necessary and sufficient condition that q be an n-ic residue of p is that
(1) q (p- 1)/δ ≡ 1, (mod p),
where δ = g.c.d. (p - 1, n). The numberf of n-ic residues of a given prime p is (p-1)/δ.
It is with the symmetric functions of these …
Colloidal Content And Related Soil Factors As Indicators Of Site Quality, Irvine T. Haig
Colloidal Content And Related Soil Factors As Indicators Of Site Quality, Irvine T. Haig
Yale School of the Environment Bulletin Series
This paper presents a study of the correlation between soil colloidal content and soil productiveness and hence a measure of the value of colloidal content in determining site quality. The character of this investigation also permitted incidental observation and comment on the relative value of organic matter, soil acidity, and soil type and class as similar measures. The findings are directly applicable to the forest soils of southern Connecticut and, more particularly, to such of these soils as occur commonly in the vicinity of New Haven. Since these soils are typical of the brown, weakly podsolized forest soils of southern …
Some Aspects Of Soil Moisture In The Forest, Ian J. Craib
Some Aspects Of Soil Moisture In The Forest, Ian J. Craib
Yale School of the Environment Bulletin Series
By determining the moisture content of carefully selected soil samples taken at various depths down to three feet, the moisture content of soils in the forest and in the open have been compared. The soils investigated were similar in their mechanical properties. Part I is an investigation of the effect of forest cover on the amount of water in the soil over the growing season and its availability. Part II is an investigation of the effect of root competition on the available water supply of forest soils.
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
No abstract provided.
"Triassic-Jurassic 'Red Beds' Of The Rocky Mountain Region": A Discussion, John B. Reeside Jr.
"Triassic-Jurassic 'Red Beds' Of The Rocky Mountain Region": A Discussion, John B. Reeside Jr.
United States Geological Survey: Staff Publications
The conclusion drawn by Professor E. B. Branson in a recent paper on the "Red Beds" of the Rocky Mountain region that parts of these beds are marine is considered likely. The conclusion that there exists no basis for subdivision of the beds is not accepted, and a division of the Mesozoic part into Lower Triassic, Upper Triassic, and Jurassic units is advocated. The conclusion that no eolian deposits are present likewise is not accepted, and the interpretation of important parts of the Jurassic unit as eolian is advocated. Disagreement is expressed with much of Professor Branson's correlation table, and …
Reaction Of Metallic Iron And Copper Sulphate In The Flotation Of Sphalerite, Charles Wilson Ambler
Reaction Of Metallic Iron And Copper Sulphate In The Flotation Of Sphalerite, Charles Wilson Ambler
Masters Theses
"Copper sulphate is a common flotation reagent for blende ores. Metallic iron is also present in the mill circuit and a reaction between the iron and the salt would be in accord with well known chemistry. The abundance of metallic iron in a flotation feed may be noted by the examination of any feed. It originates, first of all, in the mine, then the coarse crushing machines contribute their share, and finally the fine grinding medium is a large contributor. If the grinding is with cast iron balls in amount of metallics is greater than when steel is used. In …
Thomas Chrowder Chamberlin's Contribu-Tions To Glacial Geology, William C. Alden
Thomas Chrowder Chamberlin's Contribu-Tions To Glacial Geology, William C. Alden
United States Geological Survey: Staff Publications
So prominent did Thomas Chrowder Chamberlin become in the field of glacial geology that it is a matter of some interest and importance to consider what was the status of the science at the time he turned his attention, as a student and a teacher, to it. So voluminous is the literature of this subject that it is obvious that one cannot in a sketch of this kind give even a general summary of the many books and papers on the subject published in this country, even were it desirable to do so. The intention is to indicate only what …
Roster And Records Of Secretary: 1903-1929, Iowa Academy Of Science
Roster And Records Of Secretary: 1903-1929, Iowa Academy Of Science
Iowa Academy of Science Documents
Meeting minutes, conference programs, and more from the Iowa Academy of Science during the years 1903-1929.
A Study Of Ball Mills, Robert Lee Kidd
A Study Of Ball Mills, Robert Lee Kidd
Masters Theses
"The study of the ball mill is very complicated, due to the varying conditions existing in the mill. Some of these conditions are: Size of grinding media, size of feed, moisture content, and speed with its effect on the paths of the grinding media. A brief history of fine grinding will first be outlines, after which some of the theories of ball milling will be stated. Then the paths of the grinding media will be given some attention, and a new point of view about the trajectory will be brought out"--Introduction, page 2.
The Oxford Hills And Other Papers, Charles E. Waterman
The Oxford Hills And Other Papers, Charles E. Waterman
Maine Collection
The Oxford Hills and Other Papers
by Charles E. Waterman
Merrill & Webber Co., Auburn, Maine 1929.
Contents: The Oxford Hills / Mansion and Man / Androscoggin Valley Paper-Makers / Gem Stones of the White Mountain Foot Hills / Andrew Cragie
Test 169: Case Model Cc, Nebraska Tractor Test Lab
Test 169: Case Model Cc, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF TEST REPORT: Case Model CC
TEST A: The manufacturer's representative operates the tractor for a minimum of 12 hours using light to heavy drawbar loads in each gear.
This serves as a period for limber up, general observation and adjustments. Adjustments that are permissible include valve tappet clearance, breaker ,point gap, spark plug gaps, clutch and others of a similar nature. No new parts or accessories can be installed without having mention made of it in the report. No data' are recorded during this preliminary run except the time that the engine is operated.
BELT HORSEPOWER TESTS
TEST …