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Articles 292321 - 292350 of 302428

Full-Text Articles in Physical Sciences and Mathematics

Hydraulic And Sediment Transport Studies In Relation To River Sediment Control And Solid Waste Pollution And Economic Use Of The By-Products, Bruce R. Moore, Michael R. Short Jul 1972

Hydraulic And Sediment Transport Studies In Relation To River Sediment Control And Solid Waste Pollution And Economic Use Of The By-Products, Bruce R. Moore, Michael R. Short

KWRRI Research Reports

The distribution of sediments and conditions of transport were studied in the Kentucky, Big Sandy and Ohio Rivers. The sand and coal were in transport at different flow velocities for the rivers and the deposition of these sediments was a direct function of the flow conditions at a particular locality.

The flow conditions of transport of the sediments were studied in flumes as were the hydraulic conditions in model dredge holes to determine the feasibility of trapping sediment. The conditions of scour and fill were also established and compared with known conditions in a dredge hole in the Ohio River. …


Impact Of A Proposed Reservoir On Local Land Values, Philip Drucker, Charles R. Smith, Allen C. Turner Jul 1972

Impact Of A Proposed Reservoir On Local Land Values, Philip Drucker, Charles R. Smith, Allen C. Turner

KWRRI Research Reports

This project was designed to study the impact of private preconstruction land acquisition in a Central Kentucky area in which a flood-control dam and reservoir impoundment is planned. The research design was built around use of anthropological concepts and research techniques. By these means it was possible to analyze the perceived values of land to traditionalist residents, among which social and economic security concepts are paramount. Recent land purchases, locally believed to have been made chiefly by "outsiders," (urbanites from nearby Louisville), at prices out of line in terms of local agricultural worth, has been extremely unsettling contributing to the …


Environmental Status Report - January, February, March/April, May, June 1972, Florida Power Corporation Jul 1972

Environmental Status Report - January, February, March/April, May, June 1972, Florida Power Corporation

Reports

The publication of this issue of the Environmental Status Report incorporates the environmental activities of Florida Power Corporation from January to June, 1972_ As with the last Report, a six-month period is included, rather than two separate quarters, due to a scarcity of time_ It is hoped that the next issue will find the Report back on a Quarterly schedule_ The following is a summarization of the Company's supporting and associated activities from January 1, 1972 to June 30, 1972_ This work has been contributed to by many in the Company, and has been coordinated as a principal responsibility of …


Annual Report And Membership List 1971-72, Iowa Academy Of Science Jul 1972

Annual Report And Membership List 1971-72, Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Minutes of the Annual Business Meeting --- 4
Report of the Executive Secretary --- 8
Report of the 84th Session --- 14
Report of the Social Implications Committee --- 16
Report of the Finance Committee --- 18
Treasurer's Report --- 20
Report of the Librarian --- 22
Report of the Recognition and Awards Committee --- 23
Report of the Student Programs Committee --- 26
Report of the Articulation Committee --- 29
Report of the Resolutions Committee --- 31
Report of the Membership Committee --- 32
Constitution, Bylaws, and Articles of Incorporation --- 33
Constitution --- 34
Bylaws --- 38 …


The Momentum Of The Photon, K F. Ratcliff, David Peak Jul 1972

The Momentum Of The Photon, K F. Ratcliff, David Peak

All Physics Faculty Publications

No abstract provided.


Β-Delayed Proton Decay Of 9c, David D. Allred, John E. Esterl, J. C. Hardy, R. G. Sextro, Joseph Cerny Jul 1972

Β-Delayed Proton Decay Of 9c, David D. Allred, John E. Esterl, J. C. Hardy, R. G. Sextro, Joseph Cerny

Faculty Publications

The delayed-proton spectrum following the β decay of 9C (t1/2=126.5±1.0 msec) was found to consist primarily of a continuum extending from 13 to 1.5 MeV, the latter being the lowest energy observed. In addition to the previously observed peaks at 9.28 and 12.30 MeV (C.M.), possible peaks between 3 and 7 MeV have been tentatively identified.


Two Lynx-Like Cats From The Pliocene And Pleistocene, C. Bertrand Schultz, Larry D. Martin Jul 1972

Two Lynx-Like Cats From The Pliocene And Pleistocene, C. Bertrand Schultz, Larry D. Martin

Bulletin of the University of Nebraska State Museum

A new species (Lynx stouti) of small felid is described from the lower Pliocene of Colorado. This form has several characters in common with the modern Lynx and may be ancestral to that genus. A new subspecies of Lynx issiodorensis Croizet and Jobert is described as L. i. kurteni from the Mullen Assemblage, Cherry County, Nebraska. The relationships of this form to other lynxes are discussed along with the paleo-distribution of the genus.

The classification of the felinae has always been somewhat controversial, especially at the generic level. One fairly homogenous group of cats which has been separated …


The Synthesis And Characterization Of The 2,2'-Bisacylazide Of 3,3'-Bipyridine, Magdy Adly Guirguis El-Fayoumy Jul 1972

The Synthesis And Characterization Of The 2,2'-Bisacylazide Of 3,3'-Bipyridine, Magdy Adly Guirguis El-Fayoumy

Chemistry & Biochemistry Theses & Dissertations

The primary objective of this research has been the synthesis and characterization of a new heterocyclic diacylazide, the 2,2'-bisacylazide of 3,3'-bipyridine 19. This heterocyclic diacylazide has been successfully synthesized from the phenanthrolin-5,6-dione 14, and examined with regard to its.thermal and photolytic decomposition.

Thermal decomposition of this disacylazide seems to go by a double-barreled Curtius rearrangement leading to a series of pyridonaphthyridinone (20) compounds such as 22 and 29.

An initial study of the photolysis of this bisacylazide has been initiated to examine the possible formation of nitrene-type intermediates.


Determination Of Nutrient Levels And Proposed Predictive Models For Phosphate In The Lafayette River, Norfolk, Virginia, John R. Montgomery Jul 1972

Determination Of Nutrient Levels And Proposed Predictive Models For Phosphate In The Lafayette River, Norfolk, Virginia, John R. Montgomery

OES Theses and Dissertations

The Lafayette River, an Urban, well-mixed estuarine embayment, was sampled from October, 1970 to January, 1972 for phosphate, nitrate, nitrite, oxygen, water temperature and salinity. The mean values found for these samples were: oxygen saturation from 69% to 106% nitrate from 0 to 4 microgram-atoms per liter, and salinity from 13 ‰ to 24 ‰. The mouth of the Elizabeth River to Hampton Roads as also sampled from May, 1971 to August, 1971. The Lafayette and Elizabeth Rivers were also sampled over a 24 hour period in the summer of 1971 and the Lafayette River again in the winter of …


Phytoplankton Distribution In Waters Off The Northeastern Coast Of The United States, Sharon H. Craft Jul 1972

Phytoplankton Distribution In Waters Off The Northeastern Coast Of The United States, Sharon H. Craft

Biological Sciences Theses & Dissertations

Abstract unavailable.


Surface Water Turbidity In The Entrance To Chesapeake Bay, Virginia, James R. Melchor Jul 1972

Surface Water Turbidity In The Entrance To Chesapeake Bay, Virginia, James R. Melchor

OES Theses and Dissertations

Seasonal and spatial variations in the surface water turbidity across the entrance to Chesapeake Bay, Virginia, have been monitored with an optical transmissometer for one year. The data indicate a suspended-sediment gradient across the entrance with higher turbidity on the south side. This condition suggests that the flooding and ebbing tidal currents are influenced by Coriolis force. Clearer ocean water is introduced into the bay on the north side; whereas highly turbid water from the major drainage systems exits on the south side. A salinity gradient with18 0/00 on the south side of the bay and approximately 32 0/00 on …


Synthesis Of Derivatives Of Pyrido [3,4-D]Pyridazines, Diane (D'Ottavio) Martin Jun 1972

Synthesis Of Derivatives Of Pyrido [3,4-D]Pyridazines, Diane (D'Ottavio) Martin

Chemistry and Chemical Biology ETDs

The current interest in the biological activity of certain 1 ,4-disubstituted pyrido[2 ,3-d]pyridazines prompted the investigation of various derivatives of the isomeric pyrido[3,4-d]pyridazine ring system. Thus, 1,4 ­ dichloro[3,4-d]pyridazine was treated with thiourea and the intermediate thiouronium salt hydrolyzed to give pyrido[3, 4-d]pyridazine-1,4(2H,3H)-dithione which was subsequently alkylated to give 1,4-bis(alkylthio)pyrido­[3,4-d]pyridazines. On the other hand, 1,4-bis(arylthio)­pyrido[3,4-d]pyridazines were prepared by the reaction of 1,4-dichloropyrido[3,4-d]pyridazine with various substituted thiophenols. Furthermore, treatment of 1,4-dichloropyrido[3,4-d]­pyridazine with a variety of substituted anilines gave the corresponding 1,4-disubstituted aniline derivatives, whereas reaction with alkylamines afforded only the 1(4)-chloro-4(1)-alkylaminopyrido[3,4-d]pyridazines. When 1-chloropyrido[3,4-d]pyridazine-4(3H)-one or 4-chloropyrido[3,4-d]pyridazine-1(2H)-one was treated with hydrazine, the corresponding …


Geology And Ore Deposits Of The Southwest Nacimiento Range, Sandoval County, New Mexico, Otto L. Schumacher Jun 1972

Geology And Ore Deposits Of The Southwest Nacimiento Range, Sandoval County, New Mexico, Otto L. Schumacher

Earth and Planetary Sciences ETDs

The mapped area is in Sandoval County, New Mexico, 4 miles east of La Ventana. Precambrian rocks in the core of the Nacimiento uplift in this area consist mainly of quartz monzonite gneiss which has been intruded by granite. Hornblende schist xenoliths, zones of sheared quartz-plagioclase schistose gneiss, and mafic and leucocratic dike rocks are less abundant. Strata totaling 6200 feet, ranging from the Pennsylvanian Madera Formation through the Cretaceous Mancos Formation, are exposed in the area. Overlying the marine Madera Formation is 3400 feet of continental, marginal marine, and evaporite deposits consisting in ascending order of the Permian Abo, …


Defense Contracting Policy: An Interface Mechanism With The Defense Industry, George P. Neyman Iii Jun 1972

Defense Contracting Policy: An Interface Mechanism With The Defense Industry, George P. Neyman Iii

Marine Affairs Theses and Major Papers

A broad overview of the contractual relationship between the military and the defense industry with emphasis on contracting trends and the impact of these trends on the nature of the defense industry, shipbuilding in particular. A brief historical survey of government contracting from the American Revolution to the present time is designed to review the principal legislative actions developed to control the procurement process. The advantages and disadvantages of the important contract types are discussed. Defense contracting policy is found to be shifting from cost reimbursement contract to the incentive contract. The trend to contract incentives is found to be …


Micronesia: Post World War Ii Sequential Socio-Economic Development, Dale S. Brown Jr. Jun 1972

Micronesia: Post World War Ii Sequential Socio-Economic Development, Dale S. Brown Jr.

Marine Affairs Theses and Major Papers

An examination of the socio-economic development of the Trust Territory of the Pacific Islands (Micronesia). A section devoted to early development deals with the long history of foreign administrators who have controlled the islands. The paper deals with interaction between the Micronesians and their administrators and will focus upon relations with the current administrator, the United States, which operates in the islands under a mandate from the United Nations. At the time of the writing of this paper the Micronesians were holding a plebiscite to determine their future political direction. Consideration is given to economic trends within the islands, the …


Current Post Development Problems, Andrew J. Conklin Jun 1972

Current Post Development Problems, Andrew J. Conklin

Marine Affairs Theses and Major Papers

The major problems confronting United States' seaports are investigated as they relate to the 1970s time frame. The influence of the merchant marine's transition to new, large and deep drafted ships is examined as it pertains to harbor and channel depth, pier and storage requirements, waterborne traffic control and port economic impact. Present seaport facilities are barely keeping abreast with new developments in cargo transportation and handling methods. Additionally, major port development problems are magnified by the recent awarenesss of the environmental value of the coastal zone. Only a limited amount of area remains in most ports, both below the …


Growth Patterns Of The World's Merchant Marine, John R. Devereaux Jr. Jun 1972

Growth Patterns Of The World's Merchant Marine, John R. Devereaux Jr.

Marine Affairs Theses and Major Papers

Developments in the world ocean-borne transport industry since World War II are reviewed and major trends identified; based on these trends significant implications are derived. The study is limited to the deep sea segment of the shipping industry and touches on related fields, such as the coastal trades and port development, only where trends in the deep sea trade affect them. The major trends identified are the continued growth of ocean-borne trade, the ever growing ship size wherever it proves practical and economical, and the rapid evolution of ship specialization.


Lipotes Vexillifer , Robert L. Brownell Jr., Earl S. Herald Jun 1972

Lipotes Vexillifer , Robert L. Brownell Jr., Earl S. Herald

United States Department of Commerce: Staff Publications

Order Cetacea, Family Platanistidae, Subfamily Iniinae. The genus Lipotes now includes one species Lipotes vexillifer as treated below. No sub- species are recognized.


Statistical Section (June 1972), Central Bank Of Nigeria Cbn Jun 1972

Statistical Section (June 1972), Central Bank Of Nigeria Cbn

Economic and Financial Review

The dataset set contains data from central banking, commercial banking, currency in circulation, external assets, international trade, money and capital, money supply, national savings, production and public debt covering 1966-1971.


Phyletic Trends In Certain Lineages Of Quaternary Mammals, C. Bertrand Schultz, Lloyd G. Tanner, Lary D. Martin Jun 1972

Phyletic Trends In Certain Lineages Of Quaternary Mammals, C. Bertrand Schultz, Lloyd G. Tanner, Lary D. Martin

Bulletin of the University of Nebraska State Museum

Evolutionary trends in certain carnivores, rodents, bovids, and proboscideans are examined. Chronoclines are demonstrated for muskrats, beavers, mammoths, and bison. The Pliocene-Pleistocene boundary and Quaternary climatic fluctuations are also discussed.

The University of Nebraska State Museum contains a large stratigraphically controlled collection of Pleistocene animals. This collection provides a unique opportunity for the study of phyletic trends in certain lineages of mammals. Although a few phylogenetic lineages have been proposed (Schultz and Frankforter, 1946; Hibbard, et al., 1965), this has not been done for the vast majority of Pleistocene mammals. However, there is much more data available than this would …


Professor Leo Moser -- Reflections Of A Visit, Walter E. Mientka Jun 1972

Professor Leo Moser -- Reflections Of A Visit, Walter E. Mientka

Department of Mathematics: Faculty Publications

Professor Leo Moser' was known throughout the Mathematical Community as a significant researcher and excellent lecturer. I first met Leo during the Summer Research Institute in the Theory of Numbers held at the University of Colorado in 1959. After talking with him and hearing his lectures during the Institute, I felt that arrangements would have to be made in the near future for a visit to Nebraska. During the academic year 1962-63 while Professor Moser was on a lecture tour for the MAA, I invited him to present two research lectures to the Nebraska Section on May 3 and 4, …


Terminal Talk - The Wofford Connection - June 1972, Wofford College Computer Center Jun 1972

Terminal Talk - The Wofford Connection - June 1972, Wofford College Computer Center

Terminal Talk

No abstract provided.


A Planning And Cost Allocation Procedure For Computer System Management, J. Nunamaker, A. Whinston Jun 1972

A Planning And Cost Allocation Procedure For Computer System Management, J. Nunamaker, A. Whinston

Department of Computer Science Technical Reports

No abstract provided.


Cationic Copolymerization Of B-Pinene And Styrene, Charles Peter Snyder Jun 1972

Cationic Copolymerization Of B-Pinene And Styrene, Charles Peter Snyder

Honors Theses

Cationic polymerizations are the least understood of all polymerization reactions. Perhaps even less understood are copolymerizations using cationic catalysts. Very little can be found in the literature concerning B-pinene and styrene copolymers. This work was done to shed some light on this interesting subject.


Attempted Synthesis Of Diethyl 7-Dimethylsilabicyclo 2.2.1 Hepta-2,5-Dione-1,4-Dioate, David Kenneth Tart Jun 1972

Attempted Synthesis Of Diethyl 7-Dimethylsilabicyclo 2.2.1 Hepta-2,5-Dione-1,4-Dioate, David Kenneth Tart

Honors Theses

An attempt was made to synthesize diethyl 7-dimethylsilabicyclo [2.2.1) hepta-2,5-dione-l,4-dioate by reacting dimethyldichlorosilane with the dianion of 1,4-dicarbethoxy- 2,5-cyclohexadione. The products formed in the reaction were silicones and 0-silylated polymeric materials. If any of the desired product was formed, it was not detected.


Synthesis Of C14-Labeled Bis (P-Chlorophenyl) Acetic Acid (Dda), William Michael Silver Jun 1972

Synthesis Of C14-Labeled Bis (P-Chlorophenyl) Acetic Acid (Dda), William Michael Silver

Honors Theses

The past three decade has seen the widespread use of DDT as an insecticide. As a persistent insecticide, its use has prompted a great amount of research into the fate of DDT in living organisms. A large number of metabolites of DDT has been found and many identified, although not all of the metabolites were found in all of the experimental bacterium, insects, or mammals.


Photochemical Solvolysis Of Optically Active 3,5-Dimethoxy-Α-D-Benzyl Acetate, Peter Jerry Frank Jun 1972

Photochemical Solvolysis Of Optically Active 3,5-Dimethoxy-Α-D-Benzyl Acetate, Peter Jerry Frank

Honors Theses

The purpose of this work was the stereochemical study of the photochemical solvolytic reaction of 3,5-dimethoxybenzoic acid, optically active 3,5-dimethoxy-α-d-benzyl alcohol was prepared. The specific rotation of the alcohol was compared to the alcohol produced from the photochemical solvolytic reaction of 3,5-dimethoxy-α-d-benzyl acetate.


The Preparation And Kinetics Of Sterically Hindered Gold (Iii) Complexes, David Luther Fant Jun 1972

The Preparation And Kinetics Of Sterically Hindered Gold (Iii) Complexes, David Luther Fant

Honors Theses

The purpose of this research was to prepare and study complexes with steric hindrance greater than that of the dien complex but less than that of the Et4dien complex.


The Prairie Naturalist Volume 4, No. 2. June 1972 Jun 1972

The Prairie Naturalist Volume 4, No. 2. June 1972

The Prairie Naturalist

EDITORIAL: Coordination: A Step for Environmental Protection ▪ Paul B. Kannowski

AN ANALYSIS OF BARN OWL AND GREAT HORNED OWL PELLETS FROM WESTERN NEBRASKA ▪ Eric A. Rickart

SUMMER OBSERVATIONS OF THE SHORT-EARED OWL IN THE RED RIVER VALLEY ▪ W. J. Walley

ADDITIONAL GLAUCOUS GULL RECORD FOR NORTH DAKOTA ▪ B. J. Rose

MIGRATION OF BIRDS IN NORTH DAKOTA DURING FALL 1971 ▪ Douglas H. Johnson, John T. Lokemoen and Paul F. Springer

WIDGEONGRASS BALLS ON ALKALI LAKES ▪ George A. Swanson and Paul F. Springer

A PROBABLE INSTANCE OF SONGBIRD COLLISION MORTALITY ▪ R. Wayne Weier

MUNICIPAL FLOODPLAIN …


Synthetic Approaches To Certain Acenapthalene Drivatives, Douglas Jeffrey Binder Jun 1972

Synthetic Approaches To Certain Acenapthalene Drivatives, Douglas Jeffrey Binder

Honors Theses

The purpose of this investigation is the synthesis of bis- acenaphth- (1, 2a)- acenaphthene. The experimental procedures used generally follow those of previous workers. The use of 1, 8- dibromonaphthalene is necessary throughout the synthesis. The preparation used follows that of letsinger, after a preferred synthesis of 8- bromo- 1- naphthotic acid. The latter compound reacted via a modified Hunsdiecker reaction to yield 1, 8- dibromo- naphthalene. Other approaches tried never seemed to result in improved yields, or were successful. Besides this approach to 1, 8- dibromonaphthalene, an attempt to circumvent its need has been made by running a dilute …