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Articles 289381 - 289410 of 302933
Full-Text Articles in Physical Sciences and Mathematics
Petrology Of The Alaskites Of The Boulder Batholith, Montana, Kenneth C. Malick
Petrology Of The Alaskites Of The Boulder Batholith, Montana, Kenneth C. Malick
Theses and Dissertations
The Boulder batbolith outcrops in the Northern Rookies of western Montana. It is exposed over an area of 5700 km2 and extends about 112 km along the continental divide from Mullen Pass on the north to 32 km south of Butte. The Boulder batholith represents an invasion of the upper zones of the crust by a large volume of fluid granodioritia quartz monzonitic magma emplaced at the close of a main orogenic episode during late Cretaceous and Paleocene time.
Eight alaskite bodies were chosen for sampling from previous field experience and from geologic maps published by the U.S.O.S. Textural descriptions, …
Paleozoology Of Cores From The Tyler Formation (Pennsylvanian) In North Dakota, U.S.A., James C. Grenda
Paleozoology Of Cores From The Tyler Formation (Pennsylvanian) In North Dakota, U.S.A., James C. Grenda
Theses and Dissertations
A well-preserved fauna from the Tyler Formation was studied in cores from 34 wells drilled for oil in Billings, Golden Valley, McKenzie, Slope, and Stark Counties. Forty-four species of invertebrates, eleven form-species of conodonts, at least three types of fish, and at least four genera of plants· are present. Invertebrate species include 1 bryozoan, 15 brachiopods, 14 bivalves, 2 gastropods, 2 cephalopods, 2 annelids, 2 branchiopoda, at least 2 ostracodes, 2 malacostracans, 1 insect, and 1 echinoderm. Chordates include 1 "nonmarine" shark, at least 1 paleoniscoid fish, and 1 possible crossopterygian fish. A new genus and species of eocarid malacostracan …
Some Quality Studies On The Sediments Of Lake Nasser, Khadiga Mostafa Hafez
Some Quality Studies On The Sediments Of Lake Nasser, Khadiga Mostafa Hafez
Archived Theses and Dissertations
No abstract provided.
Induced Color Centers In Α-Spodumene Called Kunzite, Maher Helmy Labib
Induced Color Centers In Α-Spodumene Called Kunzite, Maher Helmy Labib
Archived Theses and Dissertations
No abstract provided.
The Late Cenozoic Geology Of West-Central Minnesota From Moorhead To Park Rapids, Roderic L. Perkins
The Late Cenozoic Geology Of West-Central Minnesota From Moorhead To Park Rapids, Roderic L. Perkins
Theses and Dissertations
Based on lithostratigraphic and geomorphic information, the Quaternary history of an area bounded by the Red River of the North, 95°00' west longitude, 47°00' and 46°45' north latitude in west central Minnesota, includes seven geologic episodes:
Glacial advances and retreats over all or part of the study area occurred during the first six geologic episodes. The glaciers advanced either southward across northern Minnesota, entering the study area from the northeast; or across eastern North Dakota and southwestern Manitoba, entering the study area from the northwest. As a result of these glacial events the sediment of Unit A, Sebeka Formation, New …
Western North Dakota Lignite Strip Mining Processes And Resulting Subsurface Characteristics, Laramie M. Winczewski
Western North Dakota Lignite Strip Mining Processes And Resulting Subsurface Characteristics, Laramie M. Winczewski
Theses and Dissertations
Data on subsurface conditions obtained prior to strip mining is useful in planning effective mining and reclamation procedures as well as predicting the subsurface characteristics after reclamation. The redistribution of the overburden sediments is less predictable, however.
Through field observations, the major mining factors controlling subsurface structure and overburden sediment redistribution were determined. These include the geometry of the coal body, pit sequence, pit curvature, overburden thickness and managerial input. At a given location, however, the detailed structures and distribution of sediment types within a waste bank were observed to depend upon the dragline cutting pattern, distance between dragline positions, …
Property And Tort In Nuclear Law Today, Kazimierz Grzybowski, William Dobishinski
Property And Tort In Nuclear Law Today, Kazimierz Grzybowski, William Dobishinski
Faculty Scholarship
No abstract provided.
Stratigraphy And Paleontology Of The Upper Cretaceous Morden Member (Vermilion River Formation) In The Outcrop Area, Northeastern North Dakota, Fredrick D. Wosick
Stratigraphy And Paleontology Of The Upper Cretaceous Morden Member (Vermilion River Formation) In The Outcrop Area, Northeastern North Dakota, Fredrick D. Wosick
Theses and Dissertations
The Late Cretaceous Morden Member is the oldest exposed bedrock unit in North Dakota, cropping out in eastern Cavalier County in the northeastern part of the state. The Morden overlies the Greenhorn Formation and underlies the Niobrara Formation. The Canadian Morden Member of the Vermilion River Formation is used in lieu of the Carlile Formation because of the lithologic similarity and proximity to the Morden type area, and the distance from the Carlile Formation type section in southeastern Colorado.
Three principal sections were measured and sampled at 2-meter intervals for microfaunal and lithologic analysis. A single well was used for …
1976 Water Quality Hillsborough County, Florida, R. G. Wilkins
1976 Water Quality Hillsborough County, Florida, R. G. Wilkins
Reports
The Hillsborough County Environmental Protection Ac t charges the Environmental Prote ction Commission with the function of establishing, operating and maintaining a continuous program for monitoring water pollution. A county-wide water quality surveillance network has been designed to provide accurate data and information as t o whether the requirements of the Act are being complied with and whether the level of water pollution is increasing or decreasing throughout the county.
This broad base of water data obtained during 1972-1976 provides useful background data for eventual development, revision and enforcement of regulations, standard effluent limitation plans, or programs established under the …
Effect Of Compliant Wall Motion On Turbulent Boundary Layers, Dennis M. Bushness, Jerry N. Hefner, Robert L. Ash
Effect Of Compliant Wall Motion On Turbulent Boundary Layers, Dennis M. Bushness, Jerry N. Hefner, Robert L. Ash
Mechanical & Aerospace Engineering Faculty Publications
A critical analysis of available compliant wall data which indicated drag reduction under turbulent boundary layers is presented. Detailed structural dynamic calculations suggest that the surfaces responded in a resonant, rather than a compliant, manner. Alternate explanations are given for drag reductions observed in two classes of experiments: (1) flexible pipe flows and (2) water-backed membranes in air. Analysis indicates that the wall motion for the remaining data is typified by short wavelengths in agreement with the requirements of a possible compliant wall drag reduction mechanism recently suggested by Langley. Copyright © 1977 American Institute of Physics.
Stability Constants Of Naco3-, Naso4- And Kco3- In Water At 25°C, Frank Dennis Blum
Stability Constants Of Naco3-, Naso4- And Kco3- In Water At 25°C, Frank Dennis Blum
Masters Theses
A new method for determining ion association constants in aqueous solutions using ion selective electrodes has been developed. This method has been applied to the NaCO3-, NaSO4- and KCO3- ion pairs at 25°C. Association constants for NaCO3- and NaSO4- were determined at various ionic strengths and extrapolated to zero ionic strength to yield 2.2 ± 0.2 for NaCO3- and 5.3 ± 0.4 for NaSO4-. Values for the association constants at an ionic strength near sea water (I=0.70) were calculated to be 1.7 ± 0.1 …
Malacostracan Crustacea From The Sundance Formation (Jurassic) Of Wyoming, Elizabeth M. Herrick
Malacostracan Crustacea From The Sundance Formation (Jurassic) Of Wyoming, Elizabeth M. Herrick
Masters Theses
No abstract provided.
An Investigation Of The Plume Theories Of Briggs And Hanna, George Kyle Cooper
An Investigation Of The Plume Theories Of Briggs And Hanna, George Kyle Cooper
Masters Theses
Many models have been developed for or applied to the prediction of mechanical draft cooling tower plumes. However, due to a serious lack of data up to this date, little has been done to verify the predictive capability of these mathematical models. This thesis attempts to rectify this situation somewhat by undertaking a thorough investigation of the plume theories of G. A. Briggs and S. R. Hanna. A study of their theoretical foundations and development, practical formulations, and ability to predict the height and length of the visible portion of mechanical-draft cooling tower plumes is undertaken. Detailed derivations of their …
A Stream Survey Of Riley Creek, Coles County, Illinois, Using Macroinvertebrates As Indicators Of Organic Pollution, Joseph R. Rowe
A Stream Survey Of Riley Creek, Coles County, Illinois, Using Macroinvertebrates As Indicators Of Organic Pollution, Joseph R. Rowe
Masters Theses
A stream survey of Riley Creek in Coles County Illinois, was undertaken to determine ecological trends and the qualitative status of the aquatic community throughout the course of the stream.
The survey encompassed the entire length of Riley Creek from the area of its status as an intermittant waterway to its confluence with Cassel Creek. Sampling periods included the months of April, May, June, July, October and November.
Macroinvertebrate collections were made at six locations along the stream approximately equidistant from each other. The organisms were assigned tolerance levels as designated by the Illinois Environmental Protection Agency.
Physical and chemical …
Reactions Of 1-Bromo-2-(P-Tolyl)Cyclopropane With Nucleophiles In The Presence Of Crown Ether, Gerald Mccomas
Reactions Of 1-Bromo-2-(P-Tolyl)Cyclopropane With Nucleophiles In The Presence Of Crown Ether, Gerald Mccomas
Masters Theses
Reactions of 1-bromo-2-(p-tolyl)cyclopropane with potassium acetate in the presence of crown ether in various solvents (DMSO, t-butanol, and toluene) have been examined. No cyclopropyl products were observed, only ring-opened p-methylsinnamyl acetates. The trans 1-bromo-2-(p-tolyl)cyclopropane isomer reacts about 3.8 times faster than the cis isomer in DMSO, but only about 1.5 times faster in t-butanol, seemingly related to solvation factors in the transition state. Although stability studies indicated that p-methylcinnamyl bromide might be an intermediate, the rate of formation of this compound in the absence of potassium acetate was much lower than rate of product formation even in the presence of …
Involvement Of Hemerythrin Sulfhydryl Groups In Heavy Atom Binding And Subunit Interactions, Suzanne Elizabeth Clarke
Involvement Of Hemerythrin Sulfhydryl Groups In Heavy Atom Binding And Subunit Interactions, Suzanne Elizabeth Clarke
Dissertations and Theses
Hemerythrin is a respiratory protein found in the erythrocytes of certain marine invertebrates. Structures have been obtained by x-ray crystallography for hemerythrins from Phascolopsis gouldii (P. gouldii) and Themiste dyscritum (T. dyscritum). Since many proteins are inactivated upon binding heavy metals such as mercury, an investigation of mercury-protein interactions in this protein was undertaken. In order to understand the nature of heavy-metal protein interactions in T. dyscritum it was necessary to identify the metalloprotein ligands since neither the liganding amino acid residues nor the geometry of the mercury complexes could be identified in the crystallographic studies.
The Geology Of The Searchlight Mining District, Clark County, Nevada, John Stewart Bown
The Geology Of The Searchlight Mining District, Clark County, Nevada, John Stewart Bown
Masters Theses
"The general area of the Searchlight mining district has been the object of various studies by geologists since 1861. The Searchlight district is located in southern Clark County, Nevada in the eastern part of the Mojave Desert at the southern end of the Eldorado Mountains. Southern Clark County is characterized by a lack of Paleozoic and Mesozoic rocks. A Precambrian complex of rocks mostly gneiss in the southwest corner of the district is non-conformably overlain by Tertiary extrusive rocks about 8,500 feet (2,590 meters) thick consisting of andesite, basalt, rhyolite, and pyroclastics. Both the gneiss and volcanic assemblage were intruded …
Geology And The Barite Potential Of The Raymond Widel Area, Cooper County, Missouri, German Francisco
Geology And The Barite Potential Of The Raymond Widel Area, Cooper County, Missouri, German Francisco
Masters Theses
"The Raymond Widel barite prospect is two miles northeast of Blackwater Town, in parts of Sections 23, 24, 25, and 26, T49N, R19W, Cooper County, Missouri. Reported in the area since the 1850's barite-galena deposits have been sporadically mined.
The Burlington-Keokuk and Warsaw formations of Mississippian age are exposed. The former is composed of coarse-grained limestone with abundant fossils, and the latter is a fossiliferous cherty limestone. These reach a thickness of over 200 feet. Local structures are not significant, but regional fold and fault structures are present outside the area.
Exploration drilling consisted of 31 drill holes ranging from …
Lower Mississippian Sedimentation In Northwestern Montana, Forest E. Haines
Lower Mississippian Sedimentation In Northwestern Montana, Forest E. Haines
Doctoral Dissertations
"Thirty-three measured sections, nine with thin sections and insoluble residues, were studied to determine the depositional history of the Allan Mountain Limestone and the lower member of the Castle Reef Dolomite of the Madison Group in northwestern Montana.
The Allan Mountain base is a fossiliferous limestone, herein named the Brownback Gulch Member, which thickens and becomes cherty to the southwest where the section at Lone Butte resembles that of the Bridger Range Waulsortian-type reefs. A crinoidal lag deposit marks a dis- conformity at the top. In the overlying silty limestone member a thin black shale (Unit 1) grades into normal …
Glacial Stratigraphy Of Southeastern North Dakota, Michael Camara
Glacial Stratigraphy Of Southeastern North Dakota, Michael Camara
Theses and Dissertations
Seven lithostratigraphic units are recognized in the glacial sediment {till) of southeastern North Dakota. Five of these units are not formally named; eventually most of these units will be correlated with formations in surrounding regions. Two of these units, Gardar and Dahlen, are formations recognized in northeastern North Dakota {Hobbs, 1975). The seven lithostratigraphic units are differentiated and correlated using the percentage of the sand, silt, and clay fractions of the till and using the proportion of igneous and metamorphic rock fragments, limestone and dolomite fragments, and shale fragments in the very-coarse-sand fraction (1 to 2 mm) of the till. …
Legislative Note, Metallic Mining And Reclamation In Michigan: Environmental Management As A Gentler Approach, John Dernbach
Legislative Note, Metallic Mining And Reclamation In Michigan: Environmental Management As A Gentler Approach, John Dernbach
John C. Dernbach
No abstract provided.
A Topological Structure On The Structure Sheaf,, Lawrence Stout
A Topological Structure On The Structure Sheaf,, Lawrence Stout
Lawrence N. Stout
No abstract provided.
Groundwater In The Wheatbelt, E P. O'Driscoll
Groundwater In The Wheatbelt, E P. O'Driscoll
Journal of the Department of Agriculture, Western Australia, Series 4
In general six factors affect the occurence of groundwater; rainfall, topography, rock type, rock structurs, vegetation, and local evaporation.
Variation in even one of these can affect the potential yield of a bore or well, the groundwater salinity, and even whether any groundwater occurs at all.
Scs 29: On The Closedness Of The Set Of Primes In Continuous Lattices, Karl Heinrich Hofmann, Oswald Wyler
Scs 29: On The Closedness Of The Set Of Primes In Continuous Lattices, Karl Heinrich Hofmann, Oswald Wyler
Seminar on Continuity in Semilattices
Also accessible at https://www2.mathematik.tu-darmstadt.de/~logik/keimel/scs.html
A Proof Of Convergence For The Tridiagonal Ql Algorithm In Floating-Point Arithmetic, James George Sanderson
A Proof Of Convergence For The Tridiagonal Ql Algorithm In Floating-Point Arithmetic, James George Sanderson
Mathematics & Statistics ETDs
Numerous routines are available to find the eigenvalues of a real symmetric tridiagonal matrix. Since it is known to converge in exact arithmetic, the tridiagonal QL algorithm with origin shift is widely used. Here we analyze the algorithm in floating-point arithmetic. This analysis suggests two modifications to the EISPACK implementation TQLl that enable one to prove correctness and hence convergence of the routine.
Also, it is known that the implicit and explicit versions of the QL algorithm produce the same results in exact arithmetic. A counter-example to the floating-point analog of this theorem is presented.
Scs 28: The Lattice Of Open Subsets Of A Topological Space, Klaus Keimel, Michael Mislove
Scs 28: The Lattice Of Open Subsets Of A Topological Space, Klaus Keimel, Michael Mislove
Seminar on Continuity in Semilattices
Also accessible at https://www2.mathematik.tu-darmstadt.de/~logik/keimel/scs.html
Scs 27: Closure Operators And Kernel Operators In Cl, Michael Mislove
Scs 27: Closure Operators And Kernel Operators In Cl, Michael Mislove
Seminar on Continuity in Semilattices
Also accessible at https://www2.mathematik.tu-darmstadt.de/~logik/keimel/scs.html
Ecology Of Suspected Damaging Coyotes And Their Interactions With Domestic Poultry And Livestock, William F. Andelt
Ecology Of Suspected Damaging Coyotes And Their Interactions With Domestic Poultry And Livestock, William F. Andelt
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Past Levels And Present State Of Northern Victoria Land Glaciers, Paul Andrew Mayewski
Past Levels And Present State Of Northern Victoria Land Glaciers, Paul Andrew Mayewski
Earth Science Faculty Scholarship
Before 1973, movement of the Ross Ice Shelf had been measured near the Transantarctic Mountains (Swithinbank, 1963), near Ross Island (Stuart and Heine, 1961) and near the ice front and to the south of Roosevelt Island (Dorrer et at., 1969). Robin (1975), assuming steady state, extrapolated these data across the ice shelf by applying volume conservation principles to measured ice thickness profiles of the ice shelf.
Weathering Stages Of A Tholeiitic Basalt (Dolerite), Queen Maud Mountains, Paul Andrew Mayewski
Weathering Stages Of A Tholeiitic Basalt (Dolerite), Queen Maud Mountains, Paul Andrew Mayewski
Earth Science Faculty Scholarship
The sparsity of datable material and key horizons throughout most of the Transantarctic Mountains requires that much of the mapping and correlation of glacial deposits, especially moraines, be based primarily on qualitative techniques. One qualitative method is to characterize the degree of weathering of clasts covering these deposits (Behling, 1971; Calkin, 1971; Nichols, 1971; and Mayewski, 1975). Lacking, however, is a detailed understanding of the role and method of weathering. To help solve this problem, soil studies have been made by Claridge and Campbell (1968) in the Shackleton Glacier region and Everett and Behling (1968), Linkletter (1972), Behling (1971), and …