Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- Singapore Management University (9338)
- Missouri University of Science and Technology (7188)
- City University of New York (CUNY) (3688)
- University of Nevada, Las Vegas (3616)
- Brigham Young University (2703)
-
- University of South Florida (2433)
- University of New Mexico (1990)
- University of Texas at Arlington (1989)
- University of Central Florida (1817)
- University of South Carolina (1789)
- Portland State University (1482)
- Syracuse University (1144)
- Chulalongkorn University (1139)
- University of Nebraska - Lincoln (963)
- University at Albany, State University of New York (862)
- Washington University in St. Louis (740)
- TÜBİTAK (643)
- The Texas Medical Center Library (550)
- Claremont Colleges (430)
- Loma Linda University (399)
- University of Denver (376)
- Old Dominion University (367)
- Utah State University (314)
- University of Kentucky (309)
- Wright State University (268)
- California State University, Monterey Bay (265)
- Regis University (260)
- Louisiana State University (257)
- Western Kentucky University (243)
- SIT Graduate Institute/SIT Study Abroad (238)
- Keyword
-
- Machine learning (746)
- Mathematics (481)
- 2014 International Conference on Hydroinformatics HIC (464)
- Artificial intelligence (433)
- Deep learning (401)
-
- Humans (355)
- Machine Learning (346)
- Climate change (262)
- College for Professional Studies (253)
- Chemistry (242)
- Sustainability (239)
- School of Computer & Information Science (236)
- Education (235)
- Agriculture (230)
- Deep Learning (217)
- Artificial Intelligence (215)
- College of Natural Science and Mathematics (209)
- Natural language processing (208)
- Security (205)
- Chemistry and Biochemistry (196)
- Algorithms (195)
- Mathematics Research (195)
- Statistics (194)
- Computer Science (193)
- Natural resources (183)
- Optimization (181)
- Geology (180)
- Atmospheric chemistry (166)
- Early California maps (165)
- Emissions (165)
- Publication Year
- Publication
-
- Research Collection School Of Computing and Information Systems (8519)
- Theses and Dissertations (3384)
- Physics Faculty Research & Creative Works (1959)
- Faculty Publications (1607)
- Electronic Theses and Dissertations (1404)
-
- Publications and Research (1350)
- UNLV Theses, Dissertations, Professional Papers, and Capstones (1270)
- Dissertations and Theses (1250)
- Chulalongkorn University Theses and Dissertations (Chula ETD) (1117)
- Chemistry Faculty Research & Creative Works (939)
- Masters Theses (938)
- Computer Science Faculty Research & Creative Works (907)
- International Journal of Speleology (906)
- Dissertations, Theses, and Capstone Projects (836)
- Doctoral Dissertations (743)
- Legacy Theses & Dissertations (2009 - 2024) (741)
- Branch Mathematics and Statistics Faculty and Staff Publications (712)
- USF Tampa Graduate Theses and Dissertations (628)
- Physics - All Scholarship (554)
- Faculty, Staff and Student Publications (525)
- Open Educational Resources (473)
- International Conference on Hydroinformatics (464)
- Mathematics and Statistics Faculty Research & Creative Works (461)
- Arts & Sciences Graduate Student Theses and Dissertations (425)
- Computer Science Technical Reports (411)
- Loma Linda University Electronic Theses, Dissertations & Projects (399)
- Computer Science and Engineering Theses - Archive (365)
- School of Geosciences Faculty and Staff Publications (350)
- Mathematics Technical Papers - Archive (343)
- Earth and Planetary Sciences ETDs (317)
- Publication Type
Articles 57241 - 57270 of 58458
Full-Text Articles in Entire DC Network
Daten Zur Kenntnis Der Algenflora Der Höhle Kölyuk Von Mánfa, George Claus
Daten Zur Kenntnis Der Algenflora Der Höhle Kölyuk Von Mánfa, George Claus
International Journal of Speleology
The Kolyuk cave lies in the southern part of Hungary in the Mecsek Mountains, about 3 km. in distance from the village of Mànfa. The material accepted for investigation originated from a recently discovered and until now completely entombed part of the cave. It was collected by the geologist Gàbor Magyari and consisted of material scraped from the walls and ceiling of a cavity in the cave, which could be reached only by underwater swimming. From these scrapings cultures were installed with sterile Knopp solution and after the algae present in the collection reproduced, a diversified flora developed which consisted …
A Study Of Certain Conservative Sets For Parameters In The Linear Statistical Model, Roger Alan Chapin
A Study Of Certain Conservative Sets For Parameters In The Linear Statistical Model, Roger Alan Chapin
Masters Theses
"In the case of the linear statistical model, it has been shown that under certain conditions the confidence intervals obtained by considering the parameters one at a time are conservative when used as a joint confidence region, using the product of confidences as the confidence. However, nothing had been known of how conservative they are. This research provides accurate estimates of the true confidence for these cases.
Also, it has not yet been proved that they are indeed conservative for all cases. It is thought that they are, and the results of this research support this conjecture"--Abstract, page ii.
Geology Of Pride Mine And New Standard Mine Area, Northwestern Yuma County, Arizona, Henry E. Fernandez
Geology Of Pride Mine And New Standard Mine Area, Northwestern Yuma County, Arizona, Henry E. Fernandez
Masters Theses
"A thick section of presumably Precambrian gneiss with thin intercalated bands of marble and schist has been mapped. There is structural continuity within these rock types as they are mutually intercalated, conformable, have gradational relations and show equal participation in the same individual fold. The layers of schist and marble in the gneiss can be followed over long distances. These rocks have undergone intense regional metamorphism, primarily dynamic, with a possible regional compressive force generated from NW-SE giving rise to sets of folds and faults in the area. From structural, petrographic and field evidence, it is concluded that the metamorphic …
An Instrument For The Measurement Of Anelastic Properties Of Glass, Thomas Frederick Miller
An Instrument For The Measurement Of Anelastic Properties Of Glass, Thomas Frederick Miller
Masters Theses
"An inverted torsion pendulum for measuring the internal friction and dynamic shear modulus of glass fibers over an extended temperature range has been constructed and calibrated. The calibration consists of the determination of the moment of inertia. Extraneous damping losses were investigated and primary sources were found to be (1) the suspension thread, (2) the method of securing the fiber and (3) air damping. Anelastic measurements were made on an annealed vitreous silica fiber and a soda-lime-silica fiber"--Abstract, page ii.
The Geology Of The Interstate Highway 244 And 44 Exchange, Kirkwood, Missouri, John Neil Thomas
The Geology Of The Interstate Highway 244 And 44 Exchange, Kirkwood, Missouri, John Neil Thomas
Masters Theses
"During the summer of 1964, construction was completed on the intersection of Interstate Highways 244, 44 and U.S. Highway 66, one mile southwest of Kirkwood, Missouri. during the construction of the interchange, numerous artificial exposures of rocks of the middle Mississippian Meramecian Series were exposed. This provided an excellent opportunity for examining fresh exposures near the type Meramecian Series. The formations of the area were studied, and startigraphic [sic] sections were prepared from three of the more complete sections that were measured and described. The highway cuts expose complete sections of the Warsaw and Salem formations, and the lower part …
The Annual Distribution And Stratification Of Phytoplankton At Aurora Lake, Portage County, Ohio, Harold G. Marshall
The Annual Distribution And Stratification Of Phytoplankton At Aurora Lake, Portage County, Ohio, Harold G. Marshall
Biological Sciences Faculty Publications
A 13-month study of a hard-water lake in northeast Ohio has provided a quantitative and qualitative record of the seasonal changes of the phytoplankton. Maximum production occurred during the summer and winter periods. The summer pulse was dominated by the cyanophyte species: Microcystis aeruginosa, Anabaena spiroides, A. circinalis, and Aphanizomenon flosaquae. The dominants of the winter pulse were the diatoms Fragilaria crotomensis and Asterionella formosa, which formed separate peaks under an ice cover in December and January, respectively. The January development extended into March with the highest concentrations for the year Being reached at approximately …
Proceedings Of A Summer Institute In Water Resources: Volume 3 - Water Quality Control And Management, P. H. Mcgauhey
Proceedings Of A Summer Institute In Water Resources: Volume 3 - Water Quality Control And Management, P. H. Mcgauhey
Reports
Foreward: Recognizing the need for training of individuals to meet the rapidly rising problems connected with water resources development, Utah State University, with National Science Foundation support, organized a Summer Institute in Water Resources for college teachers. it was hoped that participants carefully selected from all regions of the country would receive additional insight and stimulation to improve and enlarge water resources training programs at their own institutions. Thus, the accelerated dissemination of such knowledge on a national scale could be facilitated. Realizing further that the key to a successful institute of this nature lay in the excellence of its …
A Terrain Study Of The Bloodland Quadrangle, Pulaski County, Missouri, Lawrence E. Mullins
A Terrain Study Of The Bloodland Quadrangle, Pulaski County, Missouri, Lawrence E. Mullins
Masters Theses
"This study is an investigation of the environmental conditions which affect cross country movement for tracked military vehicles on a major portion of the Fort Leonard Wood Military Reservation.
The terrain has been mapped from the trafficability standpoint by an investigation of the geology, topography, pedology and restrictive vegetation characteristics of the Bloodland seven and one-half minute quadrangle. The terrain analysis was accomplished by a combination of map study, laboratory investigation, photo interpretation, and direct field study of representative soil and vegetation types. The conclusions of this analysis are presented in the form of a cross country movement map"--Abstract, page …
A Measurement Of Dead Space And Its Effect On The Homogeneous Nucleation Rate Of Water Vapor In Helium, Michael A. Grayson
A Measurement Of Dead Space And Its Effect On The Homogeneous Nucleation Rate Of Water Vapor In Helium, Michael A. Grayson
Masters Theses
"The existence of a "dead space" surrounding each nucleated water droplet is demonstrated and measurements of its rate of development are made. The effects of this "dead space" are considered to be due to both the removal of vapor from the helium-water vapor mixture and the evolution of heat about the drop due to its growth. The results confirm the usefulness of the concept of a "dead space" and provide a means for its measurement with respect to time. Recommendations for further study and a method of correcting for dead space effects is given"--page [i].
Transformations Of Tryptamine And Tryptophan By Basidiomycetes, Hsaio-Lung Cheng
Transformations Of Tryptamine And Tryptophan By Basidiomycetes, Hsaio-Lung Cheng
Masters Theses
"The product formed from tryptamine by Trichloloma nudum was identified as indoleacetic acid (IAA) and from tryptophan by Cantharellus cibrarius as indolelactic acid (ILA). The products were extracted from the spent media with organic solvents. Purification and identification of the crystalline transformation products were accomplished by means of paper chromatography, spectrophotometry and thin layer chromatography.
The conversion of tryptamine and tryptophan was also studied in cultures of Lencopaxillus paradoxus, Pluteus granularis and Pleuatus ostreatus. Only Pluteus granularis was found to transform tryptamine into IAA. Lencopaxillus paradoxus transformed tryptamine into oxindoleacetic acid (OIAA).
Paper chromatography proved to be useful …
I. An Investigation Of The Organic Compounds In The Media And Mycelium Of Naucoria Confragosa. Ii. Study Of The Extra-Cellular Pigments Of An Unknown Fungus, Yueh-Tsun Chen
Masters Theses
"The fungal metabolites excreted into the culture fluid by basidiomycetes growing on synthetic glucose media as well as formed in the mycelia of the organisms were investigated in this thesis. Earlier unpublished work had shown that Maucoria confragosa excreted into the medium compounds which were thought to be phenols. Insufficient material was recovered from an ethyl acetate extract of the medium in the present study for further investigation. Colorimetric methods were employed both for the quantitative estimation of reducing sugar not consumed by the microorganisms as well as for a measure of the total organic solids present in the spent …
Stereochemistry Of Chlorinated Diels-Alder Adducts, Harry R. Musser
Stereochemistry Of Chlorinated Diels-Alder Adducts, Harry R. Musser
Masters Theses
"Hexachlorocyclopentadiene and related compounds have been studied extensively in connection with Diels-Alder reactions. Many of the adducts formed are used as intermediates in insecticide syntheses. It is of interest to study the stereochemistry of the adducts of one of the hexachlorocyclopentadiene derivaites. 5,5-Dimethoxy-1,2,3,4-tetrachlorocyclopentadiene and various dienophiles, when allowed to react, yield compounds of the bridges bicyclo [2.2.1] hept-2-ene series. The study of the endo and/or exo configuration of various functional groups such as carboxyl, aldehyde, and hydroxymethyl can be related to the known exo-5-hydroxymethyl1-1,2,3,4-tetrachlorobicyclo-[2.2.1] help-2-ene-7-one"--Introduction, page [1].
Geology, Geochemistry And Genesis Of Selected Skarn Deposits, Northern New Brunswick, Canada, Donald John Bachinski
Geology, Geochemistry And Genesis Of Selected Skarn Deposits, Northern New Brunswick, Canada, Donald John Bachinski
Masters Theses
"An exhaustive geological and geochemical study is presented of magnetite-chalcopyrite skarn deposits occurring within the thermal aureole of the Nicholas Denys quartz maonzonie-granodiorite stock. The deposits are crudely lenticular and occur in metamorphosed impure limestone and siliceous, in part limy, argillite-greywacke. These are now represented by andradite-epidote-diopside-calcite skarn and cal-silicate to horn-felsic rocks respectively. Both deposits are spatially related to the Main fault of the Rocky Brook-Millstream fault system; late, generally northwest trending transverse faults are conspicuous and are deemed of importance in ore localization"--Abstract, page [ii].
Zinc And Copper Content Of Stream Sediment In South-Central Missouri, Shih-Cheang Cheng
Zinc And Copper Content Of Stream Sediment In South-Central Missouri, Shih-Cheang Cheng
Masters Theses
"Thirty samples of stream sediment from the North Fork River, Bryant Creek and related tributaries in south-central Missouri have been analyzed for cold-extractable copper, cold-extractable heavy metal, total copper and total zinc.
Cold-extractable copper varies from 0 to 10 ppm and averages less than 1 ppm; cold-extractable heavy metal varies from 3 to 30 ppm and averages 12 ppm; total copper varies from 50 to 200 ppm and averages 88 ppm; total zinc varies from 20 to 300 ppm and averages 86 ppm.
The pH of the stream water appears to have no affect on the metal content of the …
A Second Study Of Homogeneous Nucleation Of Water Vapor In Helium, Raymond J. Schmitt
A Second Study Of Homogeneous Nucleation Of Water Vapor In Helium, Raymond J. Schmitt
Masters Theses
"Absolute homogeneous nucleation rates in a supersaturated mixture of water vapor and helium are measured using a long sensitive time expansion chamber and a method devised by Kassner and Allard. A pulse technique is employed to produce the nucleation in an effort to suppress disturbing influences of vapor depletion and droplet growth. The time-varying nature of the supersaturation during the nucleation pulse is taken into account by an Integration over the pulse. Observed and theoretically predicted droplet concentrations are related by an assumed nucleation rate law which is adjusted until the total droplet populations predicted by integration of the assumed …
An Investigation Of Current Induced Mass Migration In Solid Metals, Steven Mitchell Kovel
An Investigation Of Current Induced Mass Migration In Solid Metals, Steven Mitchell Kovel
Doctoral Dissertations
"In this investigation of current induced mass transport, the general phenomenological equations will be considered first so as to present a picture of the experimental situation. The theoretical computations are then divided into four sections: (1) the determination of the force on a defect due to electron scattering, (2) a discussion of how the force on the defect might be shared by the surrounding ions, (3) how an external force affects the diffusion frequency of an ion, and (4) what the rate of mass transport is under the influence of an electric field. So as to simplify the discussion and …
Pair Distribution For A Cell-Model Liquid, James M. Phillips
Pair Distribution For A Cell-Model Liquid, James M. Phillips
Doctoral Dissertations
"The pair distribution function for a cell-model liquid has been derived by Lund in the form of an integral equation which depends upon the cell-center distribution function and the cell model. From this integral equation an approximate integral equation is obtained by substituting a function, which is linearly dependent upon the molecular pair distribution function and a variable parameter for the cell-center distribution function. This approximate integral equation is solved for the molecular pair distribution and the variable parameter is shown to depend upon the difference between temperature and the critical temperature. Although the exact numerical solution of the molecular …
A Study Of Near Surface Elastic-Anelastic Layers, Charles Allen Aldrich
A Study Of Near Surface Elastic-Anelastic Layers, Charles Allen Aldrich
Doctoral Dissertations
"Wave propagation through layered media is of importance in many disciplines. The near surface layers are of special significance, in that most measurements of waves are made within these layers. The purpose of this investigation was to formulate mathematical models with which to analyze the effects of near surface layering"--Introduction, page 1.
Decay Of Certain Mercury Lines In Argon, Thallium, And Pure Mercury Atmospheres, Edward E. Stepp
Decay Of Certain Mercury Lines In Argon, Thallium, And Pure Mercury Atmospheres, Edward E. Stepp
Doctoral Dissertations
"Organization of thesis and Hg-A study, The time decay of the intensity of selected mercury lines was examined under three different conditions, Each section of this thesis i s divided into three parts corresponding to these three different conditions, In each section part A concerns the decay of intensity of the 2537, 4079, 4360, and 5462 A mercury lines, following the excitation of the states from which they originate by an Hg-A de discharge, Part B concerns the decay of intensity of 14 mercury lines following the excitation of the originating state of these lines by an intense r-f discharge …
A Solution To Einstein's Gravitational Field Equation For A Spherically Symmetrical Static Perfect Fluid, Lionel Donnell Hewett
A Solution To Einstein's Gravitational Field Equation For A Spherically Symmetrical Static Perfect Fluid, Lionel Donnell Hewett
Doctoral Dissertations
"Given spherical symmetry, Einstein's gravitational field equations are reduced to a single, second order, linear, homogeneous differential equation. The solution of this equation for a homogeneous sphere is identical with Schwarzschild's solution...Values of relative density, interior mass, relative pressure, relative and absolute temperature are obtained as functions of radius, r, and are compared with corresponding values for the homogeneous sphere, and for a model sun"--Abstract, page v.
Variation In Gold Content Of Minerals Of The Marysville Quartz Diorite Stock, Montana, Erwin Joseph Mantei
Variation In Gold Content Of Minerals Of The Marysville Quartz Diorite Stock, Montana, Erwin Joseph Mantei
Doctoral Dissertations
"The purpose of this thesis was to study the amount and distribution of gold in the minerals of the Marysville quartz diorite stock, Montana. Twenty-eight rock samples were collected from various parts of the Marysville Stock, using a NS-EW grid sample pattern. Thirty additional samples were collected from selected localities and from the vicinity of the gold mines which occur around the periphery of the stock. By use of a hand magnet and a Frantz isodynamic separator, the magnetite, biotite, hornblende, and quartz-feldspar portions of the various rock samples were isolated and purified to between 90-99 percent purity. Eighteen thin …
A Graphical Method Of Estimating Heat Capacities Of Hydrocarbons, Pu-Ying Liu
A Graphical Method Of Estimating Heat Capacities Of Hydrocarbons, Pu-Ying Liu
Masters Theses
"Heat capacity arises because the individual particles comprising a substance are able to move and thus take up kinetic energy and usually also potential energy as the temperature rises. In many substances electrons do not absorb energy until very high temperatures are reached. Thus most heat capacity effects are interpreted in terms of the motion of the atoms neglecting electronic transitions. The total internal energy of a material is, therefore, equal to the sum of the energies due to translational and rotational motion of the molecules and to the vibrational motion of the atoms making up the molecules...The objective of …
Drop Growth In A Supersaturated Vapor, Roger Buecher
Drop Growth In A Supersaturated Vapor, Roger Buecher
Masters Theses
"Using kinetic theory and the thermodynamics of phase transitions, a method is derived for finding the growth rate and temperature increase of a droplet in water vapor which has been supersaturated by the expansion of a cloud chamber. Calculations are performed for a specific numerical example and compared to other work in this field"--Abstract, page [2].
Taxonomic Study Of Fossil And Recent Otoliths Of Certain Cuskeels, Gary Neal Pointer
Taxonomic Study Of Fossil And Recent Otoliths Of Certain Cuskeels, Gary Neal Pointer
Masters Theses
"Otoliths are calcareous structures occurring in the auditory labyrinths of teleost (bony) fishes. Three pairs of these earstones normally are found: the sagitta, in the sacculus; the asteriscus, in the lagena; and the lapillus in the utriculus. In fishes other than the Order cypriniformes (carp, catfishes, and related forms), the sagitta is the largest otolith, and it may be used in taxonomic and other studies. Fossil earstones of cuskeels (Family Ophidiiae-Brotulidae), constituting the Preophidion complex, occur in relative abundance at various levels in the Claiborne, Jackson, and Vicksburg groups of the Lower Tertiary on the Gulf Coast. The present study …
Geology Of Cienega Mining District, Northwestern Yuma County, Arizona, Elias Zambrano
Geology Of Cienega Mining District, Northwestern Yuma County, Arizona, Elias Zambrano
Masters Theses
"The purpose of this investigation was to determine the general geology of an unusually complex area containing several small mines and located in the northwest corner of Yuma County, Arizona. This report is the first attempt to work out in detail the lithology, structure, stratigraphy, petrography, and economic geology of the area"--Introduction, Purpose and Scope, page 1.
Operating Characteristics Of A Cloud Chamber Suited For Condensation Measurements, Donald L. Packwood
Operating Characteristics Of A Cloud Chamber Suited For Condensation Measurements, Donald L. Packwood
Masters Theses
"It is the main purpose of this research to investigate the validity of using the adiabatic laws to determine the temperature from the pressure ratio. Some of the effects which might invalidate the use of the adiabatic laws will be studied. Special consideration will be given to the accurate calculation of [gamma]. Carstens' approximate calculation of the heat flow into the chamber due to conduction will be checked. A measurement will be made of how long the chamber remains adiabatic after an expansion when the continuing expansion technique is used. The static temperature gradient throughout the chamber will be measured …
A Study Of Re-Evaporation Nuclei, Ronald Dawbarn
A Study Of Re-Evaporation Nuclei, Ronald Dawbarn
Masters Theses
"Classical considerations of the evaporation of a homogeneously nucleated droplet in an atmosphere of low humidity, indicates complete evaporation of the drop. Experimental results however, show that there is left behind a residual nucleus that is quite stable. Condensation occurs on these nuclei at comparatively low supersaturations. Using a specially instrumented cloud chamber, experimental procedures are described which attempt to investigate some of the properties of these nuclei. Various possibilities causing this stability are examined and compared to the experimental results obtained"--page [ii].
An X-Ray Study Of The Lead Zirconate-Bismuth Ferrate System, Pen-Chu Chou
An X-Ray Study Of The Lead Zirconate-Bismuth Ferrate System, Pen-Chu Chou
Masters Theses
"The lead zirconate-bismuth ferrate system was studied employing x-ray and microscopic analysis. Samples were prepared by sintering stoichiometric mixtures of the corresponding oxides followed by air quenching. The results of the analyses show the system to be probably solid solutions over the entire compositional range, although small amounts of other phases are present in some regions.
X-ray data indicate a multiple cell, orthorhombic phase, to exist over the range 100-30 mole percent PbZrO₃ . From 100-82 mole percent PbZrO₃ , the addition of BiFeO₃ reduces the distortion of the phase such that a nearly cubic x-ray pattern is obtained at …
Contribution À L'Étude De La Biologie D'Asellus Cavaticus Leydig (Note Préliminaire), Jean-Paul Henry
Contribution À L'Étude De La Biologie D'Asellus Cavaticus Leydig (Note Préliminaire), Jean-Paul Henry
International Journal of Speleology
The cavernicole asellid Asellus cavaticus Leydig has been reared in our laboratory for more than twenty months, permitting us to give some data on the sexual cycle of this species. Females provided with brood pouches seem to be more numerous in the spring, as is the case with the subterranean amphipod Niphargus virei Chevreux. The average length of the incubation period seems much shorter than that of other troglobitic species such as Niphargus virei Chevreux or Caecosphaeroma burgundum Dollfus, so that the life cycle of our species is nearer to that of epigean Asellus. The number of young per …
Grottes Du Banat (Roumanie) Explorées En 1963, Stefan Negrea, Alexandrina Negrea, V. Sencu, Lazare Botoşaneanu
Grottes Du Banat (Roumanie) Explorées En 1963, Stefan Negrea, Alexandrina Negrea, V. Sencu, Lazare Botoşaneanu
International Journal of Speleology
The paper contains the description of 23 natural or artificial underground cavities in the Banat mountains, grouped in karst zones. It is in all respects a continuation of a preceding volume (Botosaneanu, Negrea & Negrea,1963) on the caves of the Romanian Banat.