Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Environmental Sciences (726)
- Physics (601)
- Computer Sciences (526)
- Chemistry (466)
- Earth Sciences (416)
-
- Engineering (391)
- Life Sciences (307)
- Social and Behavioral Sciences (289)
- Mathematics (266)
- Oceanography and Atmospheric Sciences and Meteorology (196)
- Water Resource Management (192)
- Statistics and Probability (176)
- Natural Resources Management and Policy (172)
- Education (163)
- Natural Resources and Conservation (135)
- Geology (129)
- Science and Mathematics Education (122)
- Law (120)
- Electrical and Computer Engineering (108)
- Astrophysics and Astronomy (104)
- Materials Science and Engineering (102)
- Applied Statistics (91)
- Physical Chemistry (89)
- Arts and Humanities (87)
- Oil, Gas, and Energy (84)
- Computer Engineering (83)
- Materials Chemistry (82)
- Environmental Health and Protection (77)
- Applied Mathematics (75)
- Institution
-
- University of Nebraska - Lincoln (469)
- TÜBİTAK (261)
- Selected Works (112)
- University of Colorado Law School (111)
- Missouri University of Science and Technology (95)
-
- University of Nevada, Las Vegas (95)
- Old Dominion University (79)
- University of Wollongong (74)
- The University of Maine (72)
- Utah State University (72)
- Chinese Chemical Society | Xiamen University (71)
- William & Mary (69)
- Singapore Management University (64)
- Louisiana State University (63)
- Wayne State University (61)
- Dartmouth College (56)
- Air Force Institute of Technology (54)
- Wright State University (54)
- Claremont Colleges (52)
- Portland State University (51)
- Department of Primary Industries and Regional Development, Western Australia (50)
- University of New Hampshire (49)
- California Polytechnic State University, San Luis Obispo (43)
- University of Kentucky (39)
- University of Massachusetts Amherst (36)
- University of Northern Iowa (36)
- Brigham Young University (33)
- Nova Southeastern University (32)
- New Jersey Institute of Technology (31)
- Purdue University (30)
- Keyword
-
- Western Australia (31)
- Outdoor education (25)
- Groundwater (21)
- Water (19)
- Water quality (17)
-
- Colorado (16)
- Kentucky (16)
- Research and Technical Reports (16)
- Eutectic alloys (15)
- Lead-bismuth alloys (15)
- Physics (15)
- United States (15)
- Wyoming (15)
- Management (14)
- Natural resources (14)
- Powder River Basin (14)
- Utah (14)
- Corrosion and anti-corrosives (13)
- Lead-bismuth eutectic (13)
- Virginia (13)
- 2002 (12)
- Geology (12)
- Land use (12)
- Salinity (12)
- Steel — Corrosion (12)
- Mathematics (11)
- Montana (11)
- Soil (11)
- Vegetation (11)
- Agriculture (10)
- Publication
-
- Turkish Journal of Chemistry (113)
- Allocating and Managing Water for a Sustainable Future: Lessons from Around the World (Summer Conference, June 11-14) (74)
- Faculty Publications (73)
- Journal of Electrochemistry (71)
- Theses and Dissertations (67)
-
- Turkish Journal of Physics (64)
- Faculty of Informatics - Papers (Archive) (60)
- Research Collection School Of Computing and Information Systems (57)
- Electronic Theses and Dissertations (56)
- United States Department of Agriculture Wildlife Services: Staff Publications (56)
- Journal of Modern Applied Statistical Methods (55)
- Nebraska Tractor Tests (55)
- 2002 Bird Strike Committee-USA/Canada, 4th Annual Meeting, Sacramento, CA (53)
- Physics Faculty Research & Creative Works (44)
- Computer Science Technical Reports (37)
- Physics Faculty Publications (37)
- LSU Doctoral Dissertations (36)
- Dissertations, Theses, and Masters Projects (35)
- Coalbed Methane Development in the Intermountain West (April 4-5) (34)
- Turkish Journal of Mathematics (34)
- Turkish Journal of Electrical Engineering and Computer Sciences (33)
- Dartmouth Scholarship (32)
- Dissertations (32)
- Masters Theses (32)
- Theses (31)
- United States Geological Survey: Staff Publications (31)
- Department of Computer Science Technical Reports (30)
- Center for Coastal and Ocean Mapping (27)
- Reports (26)
- Research in Outdoor Education (26)
- Publication Type
Articles 2851 - 2880 of 3435
Full-Text Articles in Physical Sciences and Mathematics
Nebraska Summary 383: Agco Rt130 Diesel, Nebraska Tractor Test Lab
Nebraska Summary 383: Agco Rt130 Diesel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 1806: John Deere 9520t 18 Speed, Nebraska Tractor Test Lab
Test 1806: John Deere 9520t 18 Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 1805: John Deere 9520 18 Speed, Nebraska Tractor Test Lab
Test 1805: John Deere 9520 18 Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 1804: John Deere 9320t 18 Speed, Nebraska Tractor Test Lab
Test 1804: John Deere 9320t 18 Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 1811: John Deere 9220 18 Speed, Nebraska Tractor Test Lab
Test 1811: John Deere 9220 18 Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 1810: John Deere 9120 18 Speed, Nebraska Tractor Test Lab
Test 1810: John Deere 9120 18 Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 1802: John Deere 8520t 16 Speed, Nebraska Tractor Test Lab
Test 1802: John Deere 8520t 16 Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 1801: John Deere 8520 16 Speed, Nebraska Tractor Test Lab
Test 1801: John Deere 8520 16 Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Tests 2009 & 2010: Case Ih Jx 55 Diesel, Nebraska Tractor Test Lab
Tests 2009 & 2010: Case Ih Jx 55 Diesel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Tests 2013 & 2015: Case Ih Jx 65 Diesel, Nebraska Tractor Test Lab
Tests 2013 & 2015: Case Ih Jx 65 Diesel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Tests 2017 & 2019: Case Ih Jx 75 Diesel, Nebraska Tractor Test Lab
Tests 2017 & 2019: Case Ih Jx 75 Diesel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 2098: Mccormick Mtx 125 Diesel, Nebraska Tractor Test Lab
Test 2098: Mccormick Mtx 125 Diesel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 2099: Mccormick Mtx 140 Diesel, Nebraska Tractor Test Lab
Test 2099: Mccormick Mtx 140 Diesel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 2100: Mccormick Mtx 155 Diesel, Nebraska Tractor Test Lab
Test 2100: Mccormick Mtx 155 Diesel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 1812: Challenger Mt755 Diesel, Nebraska Tractor Test Lab
Test 1812: Challenger Mt755 Diesel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 1813: Challenger Mt765 Diesel, Nebraska Tractor Test Lab
Test 1813: Challenger Mt765 Diesel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 1814: Challenger Mt855 Diesel, Nebraska Tractor Test Lab
Test 1814: Challenger Mt855 Diesel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Test 1815: Challenger Mt865 Diesel, Nebraska Tractor Test Lab
Test 1815: Challenger Mt865 Diesel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
No abstract provided.
Alumina And Synthesis Intermediates Derived From Diethylkaluminum Amide, Benzaldehyde And Water, Stephen E. Hall, Lize Wilcox, William S. Tyree, David A. Lindquist, Malay K. Mazumder
Alumina And Synthesis Intermediates Derived From Diethylkaluminum Amide, Benzaldehyde And Water, Stephen E. Hall, Lize Wilcox, William S. Tyree, David A. Lindquist, Malay K. Mazumder
Journal of the Arkansas Academy of Science
The reaction of diethylaluminum amide [Et2AINH2] with benzaldehyde in toluene produces a solution of ethylaluminoxane polymer [EtAlO] and hydrobenzamide [PhCH=NCH(Ph)N=CHPh]. Alumina then is precipitated by the addition of water. Transition aluminas that may be useful in heterogeneous catalyst applications are obtained after calcining. Details of the chemistry of solution intermediates according to 1H NMR and the properties of the alumina product according to surface area analyses and powder x-ray diffraction are described.
Bedrock Geology Of West Fork Quadrangle, Washington County, Arkansas, Jack T. King, Maria E. King, Stephen K. Boss
Bedrock Geology Of West Fork Quadrangle, Washington County, Arkansas, Jack T. King, Maria E. King, Stephen K. Boss
Journal of the Arkansas Academy of Science
A digital geologic map of West Fork quadrangle was produced at 1:24,000 scale using the geographic information system (GIS) software Maplnfo. Data regarding stratigraphic relations observed in the field were digitized onto the United States Geological Survey (USGS) digital raster graphic (DRG) of West Fork quadrangle. The geology of West Fork quadrangle consists of sedimentary rocks of the Mississippian and Pennsylvanian systems. The Fayetteville Shale and Pitkin Formation represent the Mississippian system. The Hale, Bloyd, and Atoka Formations represent the Pennsylvanian System. Each of these formations consists of members that were mapped at 1:24,000 scale, and this mapping effort represents …
Preface, Alexander Kurz
Preface, Alexander Kurz
Engineering Faculty Articles and Research
No abstract provided.
Data Warehouse Applications In Modern Day Business, Carla Mounir Issa
Data Warehouse Applications In Modern Day Business, Carla Mounir Issa
Theses Digitization Project
Data warehousing provides organizations with strategic tools to achieve the competitive advantage that organazations are constantly seeking. The use of tools such as data mining, indexing and summaries enables management to retrieve information and perform thorough analysis, planning and forcasting to meet the changes in the market environment. in addition, The data warehouse is providing security measures that, if properly implemented and planned, are helping organizations ensure that their data quality and validity remain intact.
Distribution And Origin Of Clay Minerals In Konya Neogene Sedimentary Basin, Central Anatolia, Turkey, Selahatti̇n Kadi̇r, Zehra Karakaş
Distribution And Origin Of Clay Minerals In Konya Neogene Sedimentary Basin, Central Anatolia, Turkey, Selahatti̇n Kadi̇r, Zehra Karakaş
Turkish Journal of Earth Sciences
Neogene sediments having both fluvial and lacustrine characteristics are widespread in the Konya region of central Anatolia. The fluvial units are typically green in colour and thick at the margin of the basin and thinning laterally basinwards. The lacustrine sediments are represented by white, beige and cream, pure, dolomitic, sandy and clayey limestone alternating with claystone. Grain size, components and matrix of the fluvial and lacustrine sediments decrease from the margin of the basin toward its center. Smectite and chlorite in detrital fluvial sediments are associated with amphibole, illite and quartz, while sepiolite and palygorskite formed diagenetically in the carbonate …
Kinetic Spectrophotometric Determination Of Nanogram Levels Of Manganese (Ii) By Azo Dye -- Potassium Periodate -- 1,10-Phenanthroline System, Konstantin L. Mutaftchiev
Kinetic Spectrophotometric Determination Of Nanogram Levels Of Manganese (Ii) By Azo Dye -- Potassium Periodate -- 1,10-Phenanthroline System, Konstantin L. Mutaftchiev
Turkish Journal of Chemistry
The catalytic effect of manganese (II) on the oxidation of 3 - Methyl - 6 - (2 - hydroxyethoxy) - 2 - [2 - methoxy - 4 - N (N,N - diethylamino) phenylazo] benzothiazolium methylsulphate (MHMDPBM), with potassium periodate in the presence of 1,10-phenanthroline in weakly acidic media was studied. The reaction was followed spectrophotometrically by measuring the decrease in the absorbance of the dye at 560 nm. Under the optimum conditions (4x10^{- 5} mol dm^{- 3} MHMDPBM, 4x10^{- 4} mol dm^{- 3} potassium periodate, 1x10^{- 4} mol dm^{- 3} 1,10-phenanthroline, 0.1 mol dm^{- 3} buffer -- pH 3.0, 70^oC, …
Asymptotic Analysis Of Singularly Perturbed Abstract Evolution Equations In Banach And Hilbert Spaces, Dialla Konate
Asymptotic Analysis Of Singularly Perturbed Abstract Evolution Equations In Banach And Hilbert Spaces, Dialla Konate
Turkish Journal of Mathematics
In the current paper, we are concerned with the study of abstract linear evolution equations in Banach spaces in which the time derivative term is multiplied by a small parameter, say \epsilon. Such equations arise in the study of radiative transfer and neutron transport in Nuclear Physics. Following works by Krein (cf [9]) and others, Mika (cf [12,13,14,15]) using either the Hilbert method or the Compressed method has shown that the solution of the given singularly perturbed equation may be approximated upto any prescibed order by a sum of two asymptotic expansions that are the outer expansion that is valid …
Stable Isotopes Of Carbon As An Invaluable Stratigraphic Tool: An Example From The Cambrian Of The Northern Appalachians, Usa, Bosiljka Glumac, Malkah L. Spivak-Birndorf
Stable Isotopes Of Carbon As An Invaluable Stratigraphic Tool: An Example From The Cambrian Of The Northern Appalachians, Usa, Bosiljka Glumac, Malkah L. Spivak-Birndorf
Geosciences: Faculty Publications
This study illustrates the usefulness of carbon isotopes in stratigraphic interpretations of poorly fossiliferous strata beyond the resolution possible by biostratigraphy. The Upper Cambrian strata of the lower Gorge Formation in northwestern Vermont have been interpreted as highly condensed continental-slope deposits with a hiatus bracketed by the trilobite fauna of the Dunderbergia zone (Steptoean) and the Saukia zone (upper Sunwaptan). This interpretation was based on information from two thin fossiliferous intervals, the occurrence of one of them being unconfirmed in a recent study. Carbon isotopes provide a means for testing this interpretation because marine carbonate rocks deposited during the Steptoean …
Investigations Of Intramolecular Copper (I)-Arene Interactions Using A Ns2-Macrocyclic Ligand With Different Pendant Aryl Arms, Paul J. Lee
Honors Theses
Two macrocyclic ligands with a pendant phenyl group -N-[2-(l-phenyl)ethyl]-1-aza-4,8di thiacyclodecane (L1) and N-[2-0-phenyl)propyl]-1-aza-4,8-dithiacyclodecane, (L2) has been synthesized and characterized. The copper(I)-triphenylphosphine complex [LICu(PPhJ)]OTf , (2) was synthesized from L1 1/2(C6H6)[CuOTf]2, and PPh3. The complexes [LICu]OTf 1 and [L2Cu]OTf 3 were also synthesized and characterized using DC and IH NMR, UV-vis and lR spectroscopy, and ESI-MS. In CD2Cl2, 1 was found to have a fluxional behavior with the barrier ΔG to the process estimated at 9-11 kcal/mol. Variable temp. NMR spectroscopy of 1 gave compelling evidence that the phenylappended group is bound in an intramolecullar η2-fashion with the copper center. At …
The Transformation Of Iodate To Iodide In Marine Phytoplankton Cultures, George T. F. Wong, Ajcharaporn U. Piumsomboon, William M. Dunstan
The Transformation Of Iodate To Iodide In Marine Phytoplankton Cultures, George T. F. Wong, Ajcharaporn U. Piumsomboon, William M. Dunstan
OES Faculty Publications
Six species of phytoplankton, representing 6 major phylogenetic groups (2 oceanic species: a cyanobacteria, Synechococcus sp., and a coccolithophorid, Emiliania huxleyi; and 4 coastal species: a prasinophyte, Tetraselmis sp., the green algae Dunaliella tertiolecta, the diatom Skeletonema costatum and a dinoflagellate Amphidinium carterae) were tested for their ability to reduce iodate to iodide in batch cultures. They all did so to varying degrees. Thus, the reduction of iodate to iodide by phytoplankton may be a general phenomenon in the marine environment. At ambient concentrations of iodate, the rates of depletion of iodate and appearance of …
Arctic Ice Export Events And Their Potential Impact On Global Climate During The Late Pleistocene, Dennis A. Darby, Jens F. Bischof, Robert F. Spielhagen, Steven A. Marshall, Stephen W. Herman
Arctic Ice Export Events And Their Potential Impact On Global Climate During The Late Pleistocene, Dennis A. Darby, Jens F. Bischof, Robert F. Spielhagen, Steven A. Marshall, Stephen W. Herman
OES Faculty Publications
Ice sheets in the North American Arctic and, to a lesser extent, those in northern Eurasia calved large quantities of icebergs that drifted through Fram Strait into the Greenland Sea several times during the late Pleistocene. These icebergs deposited Fe oxide grains (45-250 mum) and coarse lithic clasts >250 mum matched to specific circum-Arctic sources. Four massive Arctic iceberg export events are identified from the Laurentide and the Innuitian ice sheets, between 14 and 34 ka (calendar years) in a sediment core from Fram Strait. These relatively short duration (<1-4 kyr) events contain 3-5 times the background levels of Fe oxide grains. They began suddenly, as indicated by a steep rise in the number of grains matched to an ice sheet source, suggesting rapid purges of ice through Fram Strait, due perhaps to collapse of ice sheets. The larger events from the northwestern Laurentide ice sheet are preceded by events from the Innuitian ice sheet. Despite the chronological uncertainties, the Arctic export events appear to occur prior to Heinrich events.
Outcrop To Subsurface Stratigraphy Of The Pennsylvanian Hermosa Group Southern Paradox Basin U.S.A., Alan Lee Brown
Outcrop To Subsurface Stratigraphy Of The Pennsylvanian Hermosa Group Southern Paradox Basin U.S.A., Alan Lee Brown
LSU Doctoral Dissertations
Pennsylvanian (Desmoinesian) sedimentary rocks within the Paradox Basin Four Corners area of the western United States afford a unique opportunity to study the development of sedimentary successions in a complex marine to nonmarine depositional setting. The close association of thick intervals of nonmarine fan-delta facies adjacent to and in time equivalent position to marine carbonate-evaporite facies suggests complex relationships between the factors affecting deposition. Development of an effective scheme to differentiate the depositional signatures from within these sedimentary successions is the primary goal of this study. To achieve this goal, two objectives were pursued. The first was to calibrate the …