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Articles 541 - 569 of 569
Full-Text Articles in Physical Sciences and Mathematics
Age And Growth Of The Silver Perch (Bairdiella Chrysura), Scott F. Rhodes
Age And Growth Of The Silver Perch (Bairdiella Chrysura), Scott F. Rhodes
Dissertations, Theses, and Masters Projects
No abstract provided.
The Feasibility Of Developing Forecast Systems To Predict Changes In Beach Sand Volume On Ocean Beaches During Storms, Paul Allen Bullock
The Feasibility Of Developing Forecast Systems To Predict Changes In Beach Sand Volume On Ocean Beaches During Storms, Paul Allen Bullock
Dissertations, Theses, and Masters Projects
No abstract provided.
Mathematics Of Investment, Claudia Morgan Griffin
Mathematics Of Investment, Claudia Morgan Griffin
Honors Theses
By using the text Mathematics of Investment by William L. Hart, Griffin examines the mathematics of investments.
Attitudes Concerning Birth Control And Abortion As Related To Lds Religiosity Of Brigham Young University Students, Erlend D. Peterson
Attitudes Concerning Birth Control And Abortion As Related To Lds Religiosity Of Brigham Young University Students, Erlend D. Peterson
Theses and Dissertations
This study was an analysis of the relationship between LDS religiosity of college students and their attitudes concerning birth control and abortion.
The respondents in this research were LDS college students attending Brigham Young University Fall Semester 1970. Goodman and Kruskal's gamma and a difference of means test were used to measure association and difference to determine the statistical significance of the responses as related to religiosity and attitudes concerning birth control and abortion.
The results of the study showed that (1) there was a positive relationship between conservative attitudes toward birth control and abortion and one's degree of measured …
MöSsbauer Studies Of Stable Interstitial And Substitutional Sites Of Cobalt In Gold, Charles Freeland Steen
MöSsbauer Studies Of Stable Interstitial And Substitutional Sites Of Cobalt In Gold, Charles Freeland Steen
Dissertations and Theses
Precision measurements of the Debye-Waller factor of Fe57 in Au using the wide black absorber technique have been made in the temperature range from room temperature to 830 K. The major source of error arises from Au Ly x-rays which are unresolved by the radiation detection system from the 14.4 KeV gamma ray. The K absorption edge of Br has been used to correct for the presence of x-rays.
These measurements have revealed the existence of two nonequivalent lattice sites which the Co57 impurity (parent of Fe57) may occupy. One of the sites has been …
Nebraska Minimum Standards For Artificially Gravel Packed Irrigation Wells, P. E. Fischbach, P. E. Schleusener, V. H. Dreeszen
Nebraska Minimum Standards For Artificially Gravel Packed Irrigation Wells, P. E. Fischbach, P. E. Schleusener, V. H. Dreeszen
Conservation and Survey Division
No abstract provided.
Properties Of The Interstitial In The Diamond-Type Lattice, G D. Watkins, R P. Messmer, C Weigel, David Peak, J W. Corbett
Properties Of The Interstitial In The Diamond-Type Lattice, G D. Watkins, R P. Messmer, C Weigel, David Peak, J W. Corbett
All Physics Faculty Publications
Linear combination of atomic orbital—molecular orbital cluster calculations using extended Hückel theory suggest that the interstitial carbon atom in diamond prefers an "interstitialcy" configuration. The predicted minimum-energy configuration changes with charge state, providing a possible example of the Bourgoin mechanism for "athermal" migration of the interstitial in the presence of ionizing radiation.
Shaded Topographic Map Of Nebraska, Conservation And Survey Division
Shaded Topographic Map Of Nebraska, Conservation And Survey Division
Conservation and Survey Division
No abstract provided.
Fossil Stromgren Spheres From Supernova Explosions, Menas Kafatos, P. Morrison
Fossil Stromgren Spheres From Supernova Explosions, Menas Kafatos, P. Morrison
Mathematics, Physics, and Computer Science Faculty Articles and Research
Brandt ci at. have shown that consistency in the combined observations of the Gum Nebula requires a giant H ii region, presumably formed by the Vela X supernova explosion. Mouison and Sartori had concluded on the basis of their He ii fluorescence theory of Type I supernovae that a giant H ii region would be formed as result of the ultraviolet burst. (Bottcher ci at., by integrating over the light curve, expect a smaller H ii region.) We present here in brief some consequences of the fluorescence model as illustrated by the Vela X and the Tycho supernovae. We conclude …
Concretions And Nodules In The Hell Creek Formation, Southwestern North Dakota, Gerald H. Groenwold
Concretions And Nodules In The Hell Creek Formation, Southwestern North Dakota, Gerald H. Groenwold
Theses and Dissertations
The Hell Creek Formation (Upper Cretaceous) in southwestern North Dakota consists of lagoonal and floodplain deposits and contains abundant concretions and nodules. Representative specimens of the concretions and nodules and their corresponding enclosing sediments were analyzed by thin section and by quantitative and qualitative x-ray diffraction methods.
Fourteen types of concretions and three types of nodules, classified according to shape and composition, have thus been defined. Concretionary types include calcareous sandstone lenses, “logs”, and irregular masses; sideritic sandstone lenses and irregular masses; calcareous and sideritic lignitic sandstone lenses; bone-cored rounded masses; coprolite-cored masses; jarosite bodies; pyrite spheres; baritic sandstone lenses; …
Gastropoda Of The Fox Hills Formation (Maestrichtian) Of North Dakota, J. Mark Erickson
Gastropoda Of The Fox Hills Formation (Maestrichtian) Of North Dakota, J. Mark Erickson
Theses and Dissertations
The Fox Hills Formation (Maestrichtian, Upper Cretaceous) in North Dakota contains a gastropod fauna of thirty-seven species. Five species, loganensis n. sp., Piestochilus feldmanni n. sp., Hercorhyncus (Hercorhyncus) hollandi n. sp., cvancarai n. sp., and Cancellaria siouxensis n. sp. , and genus, Dakotia, are newly described. Twenty-four genera in eighteen families representing four orders and two subclasses of Gastropoda are present. Eleven species in a like number of genera are newly reported from the Fox Hills For mation. Goniocylichna bisculnturata and rectilabrum occur in common with the gastropod fauna of the Ripley Formation of the Mississippi Embayment, which has the …
Quantitative Geomorphology And Hydrology Of The Cass River Basin, New Zealand, Frank J. Schulte
Quantitative Geomorphology And Hydrology Of The Cass River Basin, New Zealand, Frank J. Schulte
Theses and Dissertations
The Cass River drainage basin is in the Southern Alps in the central part of the South Island of New Zealand. The Alps are composed of complexly folded greywacke which is still actively rising. The basin has been modified by several glacial advances during Pleistocene time.
The Cass basin has a temperate climate characterized by a steep precipitation gradient. Its vegetation includes plants of the forest grassland, shrubland, swamp, rock, and river-bed associations.
The Cass basin may be divided into four geomorphic areas: bedrock areas, high-angle fans, moderate-angle fans, and a low-angle fan. The bedrock areas consist of fractured greywacke; …
Groundwater Flow, Hydrochemistry, And Uranium Deposition In The Powder River Basin, Wyoming, J. Ladd Hagmaier
Groundwater Flow, Hydrochemistry, And Uranium Deposition In The Powder River Basin, Wyoming, J. Ladd Hagmaier
Theses and Dissertations
The relation between regional groundwater flow, hydrochemistry, and uranium distribution in the Powder River Basin indicates that uranium was deposited during the Tertiary Period in groundwater recharge areas where the groundwater changed from a sulfate-bicarbonate water to a bicarbonate-rich water.
The regional recharge and discharge areas of present-day groundwater-flow systems have about the same location as the recharge and discharge areas of the Tertiary groundwater-flow systems. The present-day groundwater is recharged in the eastern, western, and especially in the southern margins of the basin and is discharged in the valley of the Powder River, especially in the north. Flow nets …
Erosion And Sedimentation In Lake Ashtabula, Southeastern North Dakota, Darryll T. Pederson
Erosion And Sedimentation In Lake Ashtabula, Southeastern North Dakota, Darryll T. Pederson
Theses and Dissertations
Erosion along the shore of Lake Ashtabula and nearshore and offshore sedimentation were studied from May 1969 to December 1970. The lake, located in the southeastern part of North Dakota, was formed when the Baldhill Dam stopped the flow of the Sheyenne River in 1950. Maximum depth of the lake is 45 feet in the inundated river channel immediately above the dam. The lake is 27 miles long and ranges in width from 1/3 to 1/2 mile.
Shoreline erosion, measured at stations located at 100-foot intervals around the margins of the lake, was found to be a major source of …
Origin And Distribution Of Selenium In The Upper Cretaceous Niobrara And Pierre Formations, Northeastern North Dakota, Robert M. Novak
Origin And Distribution Of Selenium In The Upper Cretaceous Niobrara And Pierre Formations, Northeastern North Dakota, Robert M. Novak
Theses and Dissertations
High concentrations of selenium, often as much as 28 ppm, have been found in the bentonitic zones near the contact of the Niobrara and Pierre Formations of Cretaceous age in northeastern North Dakota. A 64-foot section in the Pembina Hills area reveals that the highest selenium content occurs in shale and marlstone beds adjacent to the bentonite beds which, themselves, contain comparatively little selenium. Higher concentrations of selenium were found in the brown shale than in the black, with a small variation in color making a big difference in selenium content.
The selenium content of the shale and marlstone drops …
A Study Of The Exotic Game Bird Introduction Program In The Sandy Point Area Of Virginia 1970-1971, Hans Wachtmeister
A Study Of The Exotic Game Bird Introduction Program In The Sandy Point Area Of Virginia 1970-1971, Hans Wachtmeister
Dissertations, Theses, and Masters Projects
No abstract provided.
Population Dynamics Of Ospreys In Tidewater Virginia, Robert Senior Kennedy
Population Dynamics Of Ospreys In Tidewater Virginia, Robert Senior Kennedy
Dissertations, Theses, and Masters Projects
No abstract provided.
Potential Five-Coordinate Titanium-Diketonate Complexes, Pamela Bowen Barrett
Potential Five-Coordinate Titanium-Diketonate Complexes, Pamela Bowen Barrett
Dissertations, Theses, and Masters Projects
No abstract provided.
Catfish Management In The James River, Virginia, James A. Lanier
Catfish Management In The James River, Virginia, James A. Lanier
Dissertations, Theses, and Masters Projects
No abstract provided.
Age, Growth, And Mortality Of The White Perch, Morone Americana (Gmelin), In The James And York Rivers, Virginia, Richard Alan St. Pierre
Age, Growth, And Mortality Of The White Perch, Morone Americana (Gmelin), In The James And York Rivers, Virginia, Richard Alan St. Pierre
Dissertations, Theses, and Masters Projects
More than 750 white perch, Morone americana, were collected from each of two major tributaries of southern Chesapeake Bay to compare the age structures, growth rates, and mortality rates of the two populations.The James River is characterized by heavy domestic and industrial pollution, whereas the York River is only slightly polluted. Maximum ages determined by scale analysis were 7 and 10 years for males and females respectively in each river. Males and females from the James River were larger than those from the York up to ages IV and V, respectively. Older fish were larger in the York . Females …
Pleistocene Aquifers In Coles County, Illinois, James D. Hopkins
Pleistocene Aquifers In Coles County, Illinois, James D. Hopkins
Masters Theses
No abstract provided.
Comparison Of Diffusion Coefficients Measured Electrochemically And Non-Electrochemically, Terry Dick Rotsch
Comparison Of Diffusion Coefficients Measured Electrochemically And Non-Electrochemically, Terry Dick Rotsch
Masters Theses
Diffusion coefficients of Co(en)3I3⋅H2O, FeCl3, and K3Fe(CN)6 were measured using the methods of polarography, chronopotentiometry, and diaphragm cell for the purpose of determining any relationships which may exist between these values. A major objective of the present study was to relate diffusion coefficients obtained by a simple non-electrotrochemical method to diffusion coefficients used in electrochemical techniques.
It was found that the polarographically determined diffusion coefficients were all 1.04 times larger than the chronopotentiometric values. This constant factor is probably due to viscosity differences tn the polarographic and chronopotentiometric solutions …
Geology Of Mclean County, North Dakota, John P. Bluemle
Geology Of Mclean County, North Dakota, John P. Bluemle
Theses and Dissertations
McLean County, in west-central North Dakota on the east side of the Williston Basin, is covered by 8,500 to 13,000 feet of Paleozoic, Mesozoic, and Cenozoic rocks, which dip to the west at low angles. The Tertiary Tongue River and Sentinel Butte Formations are widely exposed in McLean County, and the Tertiary Cannonball Formation is exposed in a few places. Glacial drift, assigned to a new formation, the Coleharbor Formation, occurs throughout the county and reaches a maximum thickness of at least 400 feet in certain preglacial valleys.
The eastern part of McLean County, part of the Missouri Coteau, is …
The Petroleum Geology Of The Midale Subinterval In North Central North Dakota, Kent A. Johnson
The Petroleum Geology Of The Midale Subinterval In North Central North Dakota, Kent A. Johnson
Theses and Dissertations
The Mississippian Midale subinterval is the basal unit of the Ratcliffe interval of the Madison Group. The Midale subinterval, an important petroleum producing unit in North Dakota, is a dolomitized limestone which is approximately 40 feet thick. A detailed study of 17 oil fields in north central North Dakota was conducted to determine the petroleum geology of the Midale subinterval. The study was done with the use of 563 mechanical well logs and core samples from 10 wells.
The anhydrite and dolomite units of the Rival subinterval, which underlie the Midale, and the Ratcliffe interval, which over lies the Midale, …
Tungsten Carbonyl Complexes Containing Positively Charged Phosphorus Ligands, Dilip Poonamchand Shah
Tungsten Carbonyl Complexes Containing Positively Charged Phosphorus Ligands, Dilip Poonamchand Shah
Masters Theses
Two positively charged complexes, (CO)5WP(C6H5)2CH2CH2-+P(C6H5)2(CH2C6H5) Br- and (CO)5W(C6H5)2PCH2+P(C6H5)2CH3 I-, were synthesized, and their carbonyl stretching frequencies and force constants were compared to those of the uncharged complexes, (CO)5WP(C6H5)2CH2CH2P(C6H5)2 and (CO)5WP(C6H5) …
Studies In The Preparation Of Metal Enolates Of 3,3,5,5-Tetramethylcyclohexanone And Their Reactions With Lead(Iv) And Mercury(Ii) Acetates, Donald Robert Paveska
Studies In The Preparation Of Metal Enolates Of 3,3,5,5-Tetramethylcyclohexanone And Their Reactions With Lead(Iv) And Mercury(Ii) Acetates, Donald Robert Paveska
Masters Theses
No abstract provided.
Some Ecological Effects Of The Oil Industry On Farmland In East Central Illinois, Dale E. Fruendt
Some Ecological Effects Of The Oil Industry On Farmland In East Central Illinois, Dale E. Fruendt
Masters Theses
Between June, 1970 and July, 1971 a two square mile area in East Central Illinois served as a study area for the effects of the oil industry on farm land. Observations were made on several farms concerning the activity of oil companies and interviews with farmers were held. Two areas of farmland were given special attention. One was a clover field where salt water had flooded a portion of the field. The other area was a corn field where oil had flooded approximately eight acres of land. Random samples of invertebrates were taken in both of these areas as well …
A Comparative Limnological Study Of Three East Central Illinois Farm Ponds, Charles W. Furrey
A Comparative Limnological Study Of Three East Central Illinois Farm Ponds, Charles W. Furrey
Masters Theses
A comparative limnological study was conducted at three east central Illinois farm ponds between March 15 and September 18, 1970, to determine the incidence of nitrogen and phosphorus in the ponds resulting from agricultural sources. All ponds had corn, soybean, winter wheat cropping systems on their watersheds. Corn accounted for the greatest fertilizer application. One pond had significant numbers of livestock on its watershed that contributed high amounts of nitrogen and phosphorus to its waters. Limnological parameters measured at the surface, mid depth, and bottom of a ten foot water column in each pond were water temperature, dissolved oxygen, carbon …
Discrete Minimum Variance Smoothing Of A Polynomial Plus Random Noise, William F. Trench
Discrete Minimum Variance Smoothing Of A Polynomial Plus Random Noise, William F. Trench
William F. Trench
No abstract provided.