Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Environmental Sciences (2741)
- Physics (1868)
- Earth Sciences (1341)
- Life Sciences (1122)
- Water Resource Management (755)
-
- Engineering (746)
- Civil and Environmental Engineering (576)
- Chemistry (482)
- Mathematics (481)
- Geology (451)
- Computer Sciences (340)
- Oceanography and Atmospheric Sciences and Meteorology (308)
- Condensed Matter Physics (296)
- Statistics and Probability (289)
- Natural Resources and Conservation (287)
- Soil Science (235)
- Ecology and Evolutionary Biology (168)
- Animal Sciences (163)
- Atmospheric Sciences (159)
- Plant Sciences (137)
- Other Earth Sciences (133)
- Environmental Indicators and Impact Assessment (115)
- Astrophysics and Astronomy (114)
- Biochemistry, Biophysics, and Structural Biology (102)
- Applied Statistics (101)
- Aquaculture and Fisheries (98)
- Climate (94)
- Natural Resources Management and Policy (94)
- Social and Behavioral Sciences (84)
- Keyword
-
- Utah (358)
- Environmental (148)
- Impact (125)
- Management (111)
- Statement (97)
-
- Final (92)
- Physics (87)
- Water (80)
- Idaho (74)
- Ionosphere (65)
- Climate change (64)
- National (61)
- Assessment (60)
- Plan (56)
- Soil (56)
- Equator (51)
- Energy (48)
- Wyoming (46)
- Mesosphere (45)
- Geology (44)
- Study (42)
- Project (41)
- Decision (40)
- Record (39)
- Resource (39)
- Flood insurance study (38)
- Area (36)
- Field (36)
- Plasma (36)
- Analysis (35)
- Publication Year
- Publication
-
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (1427)
- All Physics Faculty Publications (652)
- Reports (558)
- All U.S. Government Documents (Utah Regional Depository) (403)
- Memorandum (316)
-
- All Graduate Plan B and other Reports, Spring 1920 to Spring 2023 (288)
- Chemistry and Biochemistry Faculty Publications (219)
- Presentations (189)
- Wildlife Damage Management Conference (189)
- Watershed Sciences Faculty Publications (146)
- Utah Space Grant Consortium (137)
- Posters (129)
- Physics Capstone Projects (117)
- Progress reports (117)
- Environment and Society Faculty Publications (108)
- Elusive Documents (102)
- Bela G. Fejer (96)
- Mathematics and Statistics Faculty Publications (85)
- Undergraduate Honors Capstone Projects (81)
- Wildland Resources Faculty Publications (78)
- Forestry (75)
- All Graduate Theses and Dissertations, Fall 2023 to Present (74)
- Student Research Symposium (73)
- Browse all Datasets (70)
- Geosciences Faculty Publications (70)
- Plants, Soils, and Climate Faculty Publications (70)
- Publications (61)
- Funded Research Records (54)
- Conference Proceedings (51)
- Journal Articles (43)
- Publication Type
- File Type
Articles 7081 - 7110 of 7340
Full-Text Articles in Physical Sciences and Mathematics
Application Of An Electronic Analog Computer For The Simulation Of Hydrologic Events On A Southwest Watershed, J. Paul Riley, Duane G. Chadwick
Application Of An Electronic Analog Computer For The Simulation Of Hydrologic Events On A Southwest Watershed, J. Paul Riley, Duane G. Chadwick
Reports
The hydrologic characteristics of watersheds in semiarid regions are dependent upon many variable and often interrelated factors. A quantitative knowledge of these factors and of their relative influence upon the system as a whole is needed in order to improve the efficiency of watershed management in these areas. In an attempt to develop a comprehensive simulation model of a semiarid watershed, research workers in the Agricultural Research Service considered the electronic quently signed with Utah State University. Analog modeling concepts are based upon the development of basic relationships which describe the various processes which occur within the surface hydrologic system …
Analysis Of Submergence In Flow Measuring Flumes, Gaylord V. V. Skogerboe, M. Leon Hyatt
Analysis Of Submergence In Flow Measuring Flumes, Gaylord V. V. Skogerboe, M. Leon Hyatt
Reports
Submerged flow exists in a measuring flume when a change in flow depth downstream from the flume causes a change in flow depth upstream for any particular constant value of discharge. When a change in tailwater depth does not affect the upstream depth, free flow exists. To evaluate the discharge under free-flow conditions, it is necessary to measure only a flow depth upstream from the contracted section (throat) of the flume, whereas two flow depths must be measured to evaluate the discharge under submerged-flow conditions. The two flow depths normally measured when submerged flow exists consist of the same upstream …
Proceedings Of A Symposium: Pollution Control Of Industrial Wastewaters, Calvin K. Sudweeks, Lynn M. Thatcher, Elmo Morgan, Franklin J. Agardy, R. E. Pailthorp, John C. Merrell Jr.
Proceedings Of A Symposium: Pollution Control Of Industrial Wastewaters, Calvin K. Sudweeks, Lynn M. Thatcher, Elmo Morgan, Franklin J. Agardy, R. E. Pailthorp, John C. Merrell Jr.
Reports
No abstract provided.
Frequency And Magnitudes Of Monthly And Annual Flow Rates (As Determined By (A) A Normal Distribution (B) By Ranking (C) A Gamma Distribution And (D) By A Log Normal Distribution), Roland W. Jeppson
Reports
Background of Program: In developing a water resources atlas for the State of Utah it was necessary to determine the characterisitcs of stream flows within the State. The variations of stream flow for any given month from year to year as well as the variations from month to month throughout the year are important characterisitcs which are determined by analyzing the streamflow records to determine their probability distributions. The program which is descirbed in the following pages was written to determine the monthly as well as annual runoff amounts which might be expected for any number of specified levels of …
Design And Calibration Of Submerged Open Channel Flow Measurement Structures: Part 4 - Weirs, Gaylord V. Skogerboe, M. Leon Hyatt, Lloyd H. Austin
Design And Calibration Of Submerged Open Channel Flow Measurement Structures: Part 4 - Weirs, Gaylord V. Skogerboe, M. Leon Hyatt, Lloyd H. Austin
Reports
No abstract provided.
A Procedure For Determining The Feasibility Of Planned Conjunctive Use Of Surface And Ground Water, Barry C. Saunders
A Procedure For Determining The Feasibility Of Planned Conjunctive Use Of Surface And Ground Water, Barry C. Saunders
Reports
Improved management of water resources is one means for alleviating deficiencies in water supply. One promising management technique is integration of ground water and surface water supplies and storage unites, or planned conjunctive use. In order to assess the value of this technique in relations to a particular area or basin, it is necessary to look at the economic, hydrologic, and legal system as a whole. A planning procedure is developed which will enable feasibility to be determined at a minimum cost.
The procedure consists of determining legal constraints, estimating benefits which will accrue to additional water, estimating the quantity …
Brief Abstracts Of Some Papers On Seeding Agents, Jay D. Schiffman, Joel E. Fletcher
Brief Abstracts Of Some Papers On Seeding Agents, Jay D. Schiffman, Joel E. Fletcher
Reports
During the preparation of a work plan for a study of the atmospheric water resources in Utah, a number of publications were studied which presented information pertaining to agents used to modify weather. These publications have been compiled to eliminate repetition of this laborious task. Brief abstracts of these papers were prepared to help investigators determine whether or not they wish to see the original publications.
Estimating Water Yields In Utah By Principal Component Analysis, Leei-Luoh Wang, A. Leon Huber
Estimating Water Yields In Utah By Principal Component Analysis, Leei-Luoh Wang, A. Leon Huber
Reports
The basic hydrologic data required to determine the water yield are usually unavailable for small basins and streams while increasing emphasis is being placed on their development. Therefore, some methods and techniques for estimating the amount of water available for development of these small units is needed. The purpose of this study is to use the concepts and techniques of statistical analysis to develop equations which are useful in estimating the water yield of watersheds for which no stream flow records are available. The approach is an extension of earlier studies at Utah State University (1, 10) in which physiographic …
Design And Calibration Of Submerged Open Channel Flow Measurement Structures: Part 2 -Parshall Flumes, Gaylord V. Skogerboe, M. Leon Hyatt, Joe D. England, J. Raymond Johnson
Design And Calibration Of Submerged Open Channel Flow Measurement Structures: Part 2 -Parshall Flumes, Gaylord V. Skogerboe, M. Leon Hyatt, Joe D. England, J. Raymond Johnson
Reports
No abstract provided.
Design And Calibration Of Submerged Open Channel Flow Measurement Structures: Part 3 - Cutthroat Flumes, Gaylord V. Skogerboe, M. Leon Hyatt, Ross Kay Anderson, Keith O. Eggleston
Design And Calibration Of Submerged Open Channel Flow Measurement Structures: Part 3 - Cutthroat Flumes, Gaylord V. Skogerboe, M. Leon Hyatt, Ross Kay Anderson, Keith O. Eggleston
Reports
No abstract provided.
Design And Calibration Of Submerged Open Channel Flow Measurement Structures: Part 1 - Submerged Flow, Gaylord V. Skogerboe, M. Leon Hyatt, Keith O. Eggleston
Design And Calibration Of Submerged Open Channel Flow Measurement Structures: Part 1 - Submerged Flow, Gaylord V. Skogerboe, M. Leon Hyatt, Keith O. Eggleston
Reports
No abstract provided.
Application Of An Electronic Analog Computer To The Problems Of River Basin Hydrology, J. Paul Riley, Duane G. Chadwick
Application Of An Electronic Analog Computer To The Problems Of River Basin Hydrology, J. Paul Riley, Duane G. Chadwick
Reports
As demands upon available water supplies increase, there is an accompanying increase in the need to assess the downstream consequences resulting from chances at specific locations within a hydrologic system. This problem was approached by electronic analog simulation of the hydrologic system. The complexity of a hydrologic model depends to a large extent upon the magnitude of the time and spatial increments utilized in the model. The increment size selected depends upon the types of problems to be solved. Three models are described, and in each succeeding model the definition in terms of time and/or space is improved. While the …
The Reliability Of Usu Telemetered Precipitation Data: 1. The Counter Precision Factor For 8 Inch By 36 Inch Gages, George W. Reynolds, Duane G. Chadwick
The Reliability Of Usu Telemetered Precipitation Data: 1. The Counter Precision Factor For 8 Inch By 36 Inch Gages, George W. Reynolds, Duane G. Chadwick
Reports
The telemetered precipitation data are read out as frequency or period numbers by an electronic counter. These counts are to be converted to inches of precipitation. The readout electronic count is within 1 count of the transmitted count.
This study applies only to the 8" x 36" cans
Using the frequency count readout gives a precision of +-.02" to +-.05 of water equivalence and varies between .02" and .04" when there is between 10" and 30" of water equivalence in the can.
Period counts give more precise measurements, ranging between +-.01" and +-.03" of precipitation over the whole scale. It …
Engineering For The Human Environment, Frank E. Moss
Engineering For The Human Environment, Frank E. Moss
Reports
President's Introduction: The environment of man has been the subject of intensive studies in recent years as the dangers of pollution became increasingly evident. The atmostphere we breathe, the water we drink, the food we eat, all are endangered by defilement. Thre resolution of the conflict can came only through a asystematic reordering of the national way of life so that man himself will not fall victim to the wastes of his civilization. For forty years Utah State University has been vitally concerned with the problems of pollution. Utah State surveys and studies have revealed the effects of pollutants on …
Groundwater Development In Arid Basins, Dean F. Peterson Jr., Harold E. Thomas, J H. Feth, P. H. Mcgauhey, James H. Milligan, Wayne D. Criddle, Judge Lewis Jones, Dallin W. Jensen, Calvin G. Clyde, Bartell C. Jensen, C. E. Jacob, Jay R. Bingham, E. O. Larson
Groundwater Development In Arid Basins, Dean F. Peterson Jr., Harold E. Thomas, J H. Feth, P. H. Mcgauhey, James H. Milligan, Wayne D. Criddle, Judge Lewis Jones, Dallin W. Jensen, Calvin G. Clyde, Bartell C. Jensen, C. E. Jacob, Jay R. Bingham, E. O. Larson
Reports
Summary: Groundwater development frequently provides a means whereby tremendous new economic opportunities are opened up. If supplies are overdrawn (mined) the ensuing regional economy may be able to affort replacements from more costly sources. In the United States the Salt River Valley of Arizona and the valleys of California provide examples. Two cases are treated in this paper, Israel and West Pakistan. In Israel, besides furnishing more than half of the basic source of water suppply, groundwater development provides opportunity for both quantity and quality management, which makes possible use of surface supplies and reclaimed sewage as firm rather than …
Feasibility Study Of A Capacitance-Type Electronic Sediment-Sensing Device, C. Earl Israelsen, Duane G. Chadwick
Feasibility Study Of A Capacitance-Type Electronic Sediment-Sensing Device, C. Earl Israelsen, Duane G. Chadwick
Reports
Difficulties caused by sediment carried in natural streams have existed since earliest times. Although instruments and techniques for measuring stream discharge have existed for many years, only recently have attempts been made to measure sediment carried by the streams. The earliest observations of sediment discharge in the United States were made by Captain Talcott in the Mississippi River in 1838 (1). More or less continuous samples of sediment from the Rio Grande have been collected by the United States Geological Survey since 1879, and from the Colorado River Basin since 1925. Studies of sediment transport are seriously hampered by the …
Mineralized Springs In Utah And Their Effect On Manageable Water Supplies, James H. Milligan, Ray E. Marsell, Jay M. Bagley
Mineralized Springs In Utah And Their Effect On Manageable Water Supplies, James H. Milligan, Ray E. Marsell, Jay M. Bagley
Reports
Need and Importance of Study
Water demands in Utah are continuously increasing. It is essential that these demands be me to insure the continued enhancement of the social and economic well-being of all sectors of our society. Since water needs must be met from a relatively fixed water supply it is imperative that supplies be managed for complete utilization in such a way that all legitimate requirement scan be satisfied.
As our available water supplies are used more completely by making a given supply satisfy more than one use, water quality problems become more pronounced. The multiplicity of uses to …
Tests Of Independence In Contingency Tables, Su-Feng Wongbhan
Tests Of Independence In Contingency Tables, Su-Feng Wongbhan
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
This report is a survey of the literature for a combination of different tests for both two-way and multi-way tests of independence in contingency tables. The derivation of the commonly used chi-square statistic for the tests will be shown immediately below, then followed by the summary of the different tests which will be the contents of this report.
Reduction And Summarization Of Forage Production Data From Pasture And Range Lands, Julian Leigh Wilkinson Jr.
Reduction And Summarization Of Forage Production Data From Pasture And Range Lands, Julian Leigh Wilkinson Jr.
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
In an attempt to control and properly manage our vast pasture and range lands there have been many problems that the scientist has been confronted with. Among these has been the problem of reducing the great quantity of collected data from the ranges and pasture lands into a form suitable for scientific analysis. In the past this reduction process has been accomplished by slow, painstaking hand calculation methods, thus making it virtually impossible for the scientist to analyze and propose corrective measures at the time they are needed. However, with the advent of high speed computing equipment this need no …
Estimation Of Irregular Spacing On Sugar Beets And Its Effect On Their Chemical Measurements And Weight, Ahmad Ali Aghabeigi
Estimation Of Irregular Spacing On Sugar Beets And Its Effect On Their Chemical Measurements And Weight, Ahmad Ali Aghabeigi
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
In an attempt to improve the yield and quality of the sugar beet, many problems arise as to the effect of "growing space" on the individual beets. Large quantities of chemical data can be collected on individual beets and the problem of reducing this data to a suitable and understandable effect of space on the chemical data needs investigating. In the past this reduction process has been accomplished by slow hand calculation methods , thus making it virtually impossible for the scientist to analyze and propose corrective measures at the time they are needed . With the use of high …
Man And His Water Resource, Dean F. Peterson
Man And His Water Resource, Dean F. Peterson
Faculty Honor Lectures
Several preceding honor lectures have dealt with water. The title of a recent one, "Water and Man," by Dr. Sterling Taylor closely resembles the one for this paper. Dr. Taylor's paper dealt primarily with the physical science of water. This one will consider the nature of the use of water by man and the technological and institutional structure related to that use. Thus there should be no serious overlap. My friends in the social sciences may be surprised, too, to find that somehow this lecture has spilled over into their territory. But engineering is the implementation of science and technology. …
Bayesian Inference, Sing-Chou Wu
Bayesian Inference, Sing-Chou Wu
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
Bayes' original paper "Essay Towards Solving a Problem in the Doctrine of Change" was published in Philosophical Transactions of the Royal Society, 1763. Over 200 years, Bayes' Concepts have survived numerous critical onslaughts. Even though Bayesian Inference is still regarded as being somewhat unorthodox, it is becoming more generally accepted each year by statisticians and other scientists.
It is the purpose of this paper to provide a bird's-eye view of Bayesian Inference with emphasis on the comparison of Bayesian approaches and conventional approaches. This paper is written for those who have had about one year's background in mathematical statistics.
Some …
A Logistic System Simulation Model Encompassing Poisson Processes And Normal Or Weibull Life, Willard A. Hansen
A Logistic System Simulation Model Encompassing Poisson Processes And Normal Or Weibull Life, Willard A. Hansen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This thesis describes a computer simulation model for determining effective spares stock levels for recoverable items at Air Force bases and depots. The simulation model is based on the following fundamental inventory theory; whenever a demand arises, it is satisfied from stock on hand, and the quantity equal to that demand is recorded immediately; when a demand exceeds stock on hand, the excess demand is backordered immediately and when item life expires procurement action is initiated at depot level. The resulting product of the model cam be used as a guide for the optimum distribution of available spares or as …
A Density For A Generalized Likelihood-Ratio Test When The Sample Size Is A Random Varible, Raymond H. Neville
A Density For A Generalized Likelihood-Ratio Test When The Sample Size Is A Random Varible, Raymond H. Neville
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Many articles, books, papers, and abstracts have been published, which describe the analysis and design of experiments. R. A. Fisher's (1951) book, The Design of Experiments, is referred to by D. J. Finney (1960) as the classic for experimental designs. Some of the more outstanding books and publications in this area are those by Cochran and Cox (1957), Cox (1958), Davis et al., (1954), Federer (1955). Quenouille (1953). and Kempthorne (1952).
Stratigraphy Of The Laketown Dolostone, North-Central Utah, David R. Budge
Stratigraphy Of The Laketown Dolostone, North-Central Utah, David R. Budge
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The main objective of the present study is to provide a greater understanding of the strata referred to as the Silurian System in north-central Utah and southeastern Idaho and to serve as a basis for comparative regional studies in Silurian stratigraphy. It may be properly classified as a detailed reconnaissance of limited areal extent involving a single stratigraphic unit. It is based on field work done intermittently during the summer months of 1963-65 and laboratory and library work accomplished during the intervening winter months.
Review Of Reliability Techniques, Eugene Richard Doherty
Review Of Reliability Techniques, Eugene Richard Doherty
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In the development of any product to perform a specific function the first concern of the engineer is to design for satisfactory operation. Engineers originally approached the reliability problem by using excessive safety factors to be assured the structure or material would withstand the calculated loads and stresses. The engineer also learned from operating or testing the equipment until failures occurred and then redesigning as mistakes became apparent. These methods were time consuming and often resulted in bulky over designed products. These approaches became impractical with the advent of new technological advancements. The accelerated industrial development of aircraft, missiles, and …
Probable Circular Error (Cep) Of Ballistic Missiles, James Edward Moran Jr.
Probable Circular Error (Cep) Of Ballistic Missiles, James Edward Moran Jr.
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The survival of our nation, during a nuclear exchange, depends upon an effective national defense structure. The prime weapon system in this defense structure is the ballistic missile. Although many factors enter into an evaluation of the effectiveness of a ballistic missile, one of the most important measure is accuracy. Without an accurate weapon system we have no weapon system.
The Department of Defense has places emphasis on using a method of accuracy evaluation called "Probably Circular Error (CEP)." Probably Circular Error is defined as "The radius of a circle, centered at the intended target, within which 50% of the …
A Monte Carlo Study Of Non-Linear Regression Theory, Ya-Ming Liu
A Monte Carlo Study Of Non-Linear Regression Theory, Ya-Ming Liu
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Multiple regression provides the capability of using non-linear functions to fit various curvilinear surfaces. These non-linear functions are, however, linear in the parameters. Non-linear term of the variables such as X2, X3, ln X, X, YX are incorporated in a linear model. For example:
Y = b0 + b1 x1 + b2 x12 + b3 lnx2 + ϵ
Many practical situations require the fitting of mathematical functions which are non-linear in the parameters and perhaps the variables. For example:
Y = b, eb2X + ϵ
Nitrification In Three Different Soils In Polyethylene Bags In The Field Overwinter, William R. Olmstead
Nitrification In Three Different Soils In Polyethylene Bags In The Field Overwinter, William R. Olmstead
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Nitrification, the process whereby ammonical-nitrogen (NH4+ - N) is changed into nitrate-nitrogen (NO3--N), is one of the more important biochemical processes associated with agriculture. Nitrate appears to be the form of N that most crops can most readily utilize.
The Effect Of Soil Adsorbents On The Thermodynamic Properties Of Soil Water System, Taghi Manbeian
The Effect Of Soil Adsorbents On The Thermodynamic Properties Of Soil Water System, Taghi Manbeian
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
It has been generally recognized that the surface phenomena of the solid particles such as shrinking and swelling, water- holding capacity, water' movement, and cation exchange are important in understanding the physical properties of the soil. Clay is the most prevalent material in the colloidal fraction of many soils. Because of the complex nature of the surface of clays and the small size of the particles, the direct study of surface phenomena is difficult. Thermodynamic functions change in accordance with changes and organization within the system. Thus, an examination of the thermodynamics of surface phenomena provides some understanding of the …