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Articles 7801 - 7830 of 7953
Full-Text Articles in Physical Sciences and Mathematics
Anti-Associative Systems, Dick R. Rogers
Anti-Associative Systems, Dick R. Rogers
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
A set of elements with a binary operation is called a system, or, more explicitly, a mathematical system. [2] The following discussion will involve systems with only one operation. This operation will be denoted by "⋅" and will sometimes be referred to as a product.
The Lower Devonian Water Canyon Formation Of Northeastern Utah, Michael E. Taylor
The Lower Devonian Water Canyon Formation Of Northeastern Utah, Michael E. Taylor
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In 1948 Williams subdivided the Jefferson Formation of northeastern Utah into two formations. The upper formation was referred to as the Late Devonian Jefferson Formation and the lower formation the Early Devonian Water Canyon Formation (Williams, 1948, p. 1138). Since that time detailed study of the Water Canyon Formation has not been made. It is the purpose of this investigation to describe in detail the lithology and paleontology of the formation and their implication as to the environment of deposition of Early Devonian time in northeastern Utah.
Pressure Dependence Of Soil Water Matric Potential, Bozorg Bahrani
Pressure Dependence Of Soil Water Matric Potential, Bozorg Bahrani
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The partial specific Gibbs1 free energy or the chemical potential has been shown to be the most desirable thermodynamic function for describing soil-water systems. The absolute value of the chemical potential of soil water cannot be determined. If pure water at standard temperature and pressure is taken as the reference, the difference between the chemical potential of soil water and that of the reference can be measured and is called "soil water potential," which has the dimension of energy per unit mass.
The barometric pressure at the sea level has been accepted as the standard reference pressure. Thus, any …
Nitrite Reactions In Soil, John Otto Reuss
Nitrite Reactions In Soil, John Otto Reuss
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Losses of soil nitrogen that cannot be attributed to leaching or crop removal have been observed in many field experiments. Several mechanisms have been proposed to account for these losses.
Differentiation Between The Ph Effect And The Bicarbonate Ion Effect In Causing Lime-Induced Chlorosis, Hyrum Del Var Petersen
Differentiation Between The Ph Effect And The Bicarbonate Ion Effect In Causing Lime-Induced Chlorosis, Hyrum Del Var Petersen
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Lime-induced chlorosis has been recognized for many years as a problem where plants are grown on calcareous soils. There are many factors associated with and influencing this form of iron chlorosis and because of this it has been very difficult to determine the relationship between the factors and chlorosis.
Salt Effect On Water Requirements Of Plants, Abdel-Wahhab M. H. Sallam
Salt Effect On Water Requirements Of Plants, Abdel-Wahhab M. H. Sallam
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Water requirement was defined by Briggs and Shantz in 1911 as the ratio of the weight of water absorbed by a plant during its growth to the weight of dry matter produced. Ballard (1933) and Williams (1935) defined water requirement as the ratio of the amount of water transpired to the amount of dry matter produced. Ballard (1933) and Williams (1935) defined water requirement as the ratio of the amount of water transpired to the amount of dry matter formed during the whole or any part of the life cycle of the plant. Miller (1938) and Kramer (1959) postulated that …
A Field Study Of Miscible Displacement In Saturated Soils, Lloyd Dowley Mcfadden Sadler
A Field Study Of Miscible Displacement In Saturated Soils, Lloyd Dowley Mcfadden Sadler
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Extensive research has been carried out in both field and laboratory to explain water and solute movement under both saturated and unsaturated conditions. The importance of such work is obvious, since any attempt at exploring land reclamation by leaching or nutrient movement in plant feeding (to name only two) is subject to interpretations and theories of moisture flow.
Water flow through soil during reclamation by leaching can be termed miscible displacement since soil water and leaching water do not have a distinct fluid-fluid interface and will physically mix. It is probable that miscible displacement investigations can contribute to an understanding …
Dissolved-Mineral Inflow To Great Salt Lake And Chemical Characteristics Of The Salt Lake Brine: Part 1- Selected Hydrologic Data, D. C. Hahl, C. G. Mitchell
Dissolved-Mineral Inflow To Great Salt Lake And Chemical Characteristics Of The Salt Lake Brine: Part 1- Selected Hydrologic Data, D. C. Hahl, C. G. Mitchell
Elusive Documents
No abstract provided.
Colorado River Storage Project, Glen Canyon Unit, Lake Powell, Area And Capacity Tables, Bureau Of Reclamation; United States
Colorado River Storage Project, Glen Canyon Unit, Lake Powell, Area And Capacity Tables, Bureau Of Reclamation; United States
Elusive Documents
No abstract provided.
Developing A State Water Plan Utah's Water Resources--Problems And Needs--A Challenge, Utah Water Research Laboratory
Developing A State Water Plan Utah's Water Resources--Problems And Needs--A Challenge, Utah Water Research Laboratory
Reports
Of all the natural resources with which Utah has been endowed none is more vital to the social and economic well-being of the people than it water resource. We cannot manufacture water. We have found no acceptable substitute. Not one more drop of water is available for our use today than was available to the pioneers. Yet water uses and water demands have multiplied over the years. Since we can do little to change nature's water allotment to Utah we must learn how to utilize our existing supplies more judiciously. This means devoting increasingly more attention to problems of water …
Bear Lake And Its Future, William F. Sigler
Bear Lake And Its Future, William F. Sigler
Faculty Honor Lectures
Even in such a wide-ranging and eternally changing field as biology, a few statements about certain aspects can be made with a minimum likelihood of their being refuted. In this class are the following: No two lakes are identical. Any given lake is simultaneously many things to many people. A lake is never static. The influence of a lake reaches far beyond its shores.
Bear Lake, Utah-Idaho, can be used to good advantage to exemplify the truth of these statements. It defies meaningful comparison with other lakes unless a mass of detailed statistics is employed. To the fisherman and water …
The Mineral Resources Of The Sevier River Drainage, Central Utah, David T. Sanders
The Mineral Resources Of The Sevier River Drainage, Central Utah, David T. Sanders
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
A survey of the mineral resources, the economic rock products, and the ground-water reserves of that part of central Utah drained by the Sevier River system was undertaken by the author in the fall of 1960 as a continuation of a research project directed toward the stimulation of economic growth in the state of Utah. The project was initiated in 1959 by Dr. Donald R. Olsen and Dr. J. Stewart Williams, who conducted a similar survey of a five county area in southwestern Utah (Olsen and Williams, 1960).
Through a review of existing literature, preliminary field examination of most of …
Geology Of The Summer Ranch And North Promontory Mountains, Utah, O. Clair Adams
Geology Of The Summer Ranch And North Promontory Mountains, Utah, O. Clair Adams
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The Summer Ranch and North Promontory Mountains have not been studied in detail geologically, although the surrounding mountains have been extensively investigated. Within the limits of this area, sedimentary rocks of Mississippian through Permian crop out. Sedimentary and volcanic rocks of Tertiary age are also exposed. Extensive Lake Bonneville deposits underlie the valleys and overlap the foothills.
Molybdenum Chelates Of 8-Hydroxyquinoline-5-Sulfonic Acid, Ellis Ray Peterson
Molybdenum Chelates Of 8-Hydroxyquinoline-5-Sulfonic Acid, Ellis Ray Peterson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Man has had an intense interest in the role of enzymes in biological reactions for many years. The basic question -- how enzymes are able to function so efficiently -- remains as yet largely unanswered.
Only in recent years has it been discovered that molybdenum is essential for certain biological processes. For example, traces of molybdenum added to certain soils have resulted in spectacular plant growth (1). Four enzymes are known to contain molybdenum: nitrate reductase (2), hydrogenase (3), xanthine oxidase (4), and aldehyde oxidase (5). In each of these enzymes riboflavin is also present as the coenzyme FAD (flavin …
Relations Between Transpiration, Leaf Temperatures, And Some Environmental Factors, Ronald Kay Tew
Relations Between Transpiration, Leaf Temperatures, And Some Environmental Factors, Ronald Kay Tew
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Transpiration is the loss of water in vapor form from a plant. This is essentially the same process as evaporation except that it is modified by plant structure. Large quantities of water are removed from the soil, transferred through the conducting tissues of the plant, and dissipated into the air each day. As soon as the water is lost to the atmosphere, it becomes unavailable for human use.
Upper Cretaceous Stratigraphy Of The Central Part Of Utah, Fredric R. Van De Graaff
Upper Cretaceous Stratigraphy Of The Central Part Of Utah, Fredric R. Van De Graaff
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Rocks of Late Cretaceous age in the central part of Utah are dominantly elastic. In general, the sediments in the west are of conglomerate and sandstone of continental origin; the sediments in the east are of sandstone and shale of marine origin, These rocks were deposited at or near the western shore of a sea which extended from the Arctic to the Gulf of Mexico. The strand line lay in a general northern direction through Utah with land to the west and marine water to the east.
The Effect Of Chelates On Phosphorus Availability And Mobility, Salah Ahmed Tahoun
The Effect Of Chelates On Phosphorus Availability And Mobility, Salah Ahmed Tahoun
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Soil-phosphorus relations and plant-phosphorus relations have attracted the interest of many investigators since Liebig introduced his famous theory about the importance of the mineral matters to the plant in 1840. It was soon realized that phosphorus nutrition was a problem not easily solved for two reasons. 1. The added phosphorus fertilizers, soon after soil application are converted by some reactions in the soil to complex compounds far less soluble, consequently less available to the plant. Conclusions about this process led to controversial debates until it was discovered that a general statement covering all soils was impossible since the reactions involved …
The Influence Of Advective Energy On Evapotranspiration, Mahmoud Abdel Aziz
The Influence Of Advective Energy On Evapotranspiration, Mahmoud Abdel Aziz
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Evaporation and transpiration from the soil and plant, respectively, have received increasing attention from those who work with water supply, irrigation, and drainage.
On The Enthalpy And Entropy Of Soil Water, Robert A. Kohl
On The Enthalpy And Entropy Of Soil Water, Robert A. Kohl
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Just twenty years have passed since the first papers were published on the application of chemical thermodynamics to the soil-water system (11, 14). Since then, soil physicists have used thermodynamics in an attempt to characterize and learn more about this intricate system.
Complexing Of Sugars And Polyhydroxy Alcohols With Molybdenum (Vi), Su Chin Kiang
Complexing Of Sugars And Polyhydroxy Alcohols With Molybdenum (Vi), Su Chin Kiang
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Molybdenum is very important in the life processes of both plants and animals. It acts as a catalyst in promoting and controlling many biological reactions in living cells, but exactly what it does and how it functions are not well understood. In the past because of the obvious complexity of the reactions concerned and the extremely minute quantities of molybdenum involved, its presence was long undetected. Lately, molybdenum has drawn special attention on account of its effects on metabolic processes, particularly of plants. In this regard, molybdenum has been shown to be present in four enzymes: nitrate reductase (JJ), xanthine …
Scs Natinoal Engineering Handbook: Section 15, Irrigation, Chapter 9--Measurement Of Irrigation Water, Soil Conservation Service, United States Department Of Agriculture
Scs Natinoal Engineering Handbook: Section 15, Irrigation, Chapter 9--Measurement Of Irrigation Water, Soil Conservation Service, United States Department Of Agriculture
All U.S. Government Documents (Utah Regional Depository)
Measurement of Irrigation Water describes the various methods of measuring irrigation water that are commonly used on irrigated farms. Tables and charts giving rates of flow for various structures and measuring devices are included. It is intended for use by Soil Conservation Service engineers providing assistance to individual farms or groups of farms.
A Survey Of The Waters Of The Cache National Forest, Utah, C.J. D. Brown
A Survey Of The Waters Of The Cache National Forest, Utah, C.J. D. Brown
Elusive Documents
No abstract provided.
A Matrix Formulation Of The Least-Squares Method And Its Application To Nuclear Decay Schemes, Otto Harry Otteson
A Matrix Formulation Of The Least-Squares Method And Its Application To Nuclear Decay Schemes, Otto Harry Otteson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Many people call physics an ''exact science". This may be true depending on our definition of exact. Most dictionaries include as a definition of exact the words "strictly accurate". The average man thinks of an "exact science" as one which yields "strictly accurate'' results. Physics then is exact only to a degree.
Water Requirements For Waterfowl Areas Near The Great Salt Lake Parts V-Vi, J. E. Christainsen, Ming Chang Tsai, D. K. Kaushik, J. B. Law, J. W. Teeter
Water Requirements For Waterfowl Areas Near The Great Salt Lake Parts V-Vi, J. E. Christainsen, Ming Chang Tsai, D. K. Kaushik, J. B. Law, J. W. Teeter
Reports
This report reviews activities on this project since the Progress Report, Part IV, June 1961.
The summer of 1961 has been one of the driest on record for Ogden Bay and Howard Slough Refuge. The extreme shortage of irrigation water has resulted in very little flow in the Howard Slough which originates from return flow. The available water from the Weber River for the Ogden Bay Refuge was also the lowest on record. The scarcity of water at these two refuges has resulted in increased salinity.
Most of the routine work on the project during the summer was done by …
Silt Project, Colorado: Colorado River Storage Project, U.S. Department Of Agriculture
Silt Project, Colorado: Colorado River Storage Project, U.S. Department Of Agriculture
Elusive Documents
The purpose of this report is to present information regarding the soil capabilities for irrigation, the present and future land use and production pattern, the costs associated with on-farm irrigation development, prospective size and type of farm, direct agricultural benefits and probable farm incomes with proposed irrigation development for the Silt project. In addition to the agricultural phases, this report deals with the impacts of the project on the national forests and the relationship of watershed conditions to the project.
This report also is intended to aid the Bureau of Reclamation in developing their Definite Plan Report, and to provide …
A Determination Of The Earth's Gravity Field In Spheroidal Coordinates, M. Spencer Hamilton Jr.
A Determination Of The Earth's Gravity Field In Spheroidal Coordinates, M. Spencer Hamilton Jr.
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The earth's gravity field G * at a point P in the region surrounding the earth's surface is defined as the force acting on a unit mass concentrated at P. This is a force resulting from two components: (1) G1 due to the gravitational attraction of the earth's mass, and (2) G2 due to the earth's rotation.
As a result of Newton's law of gravitation, G1 can be written in integral form as follows:
G1 = k ( (V ( rdm/r3
where r = PQ, r = |r|, Q is a point which ranges …
Content, Sequence, And Emphasis Of Arithmetical Concepts As Presented In Six Textbooks And An Analysis Of Student Errors In Fifth Grade Arithmetic, Lorenzo Groutage
Content, Sequence, And Emphasis Of Arithmetical Concepts As Presented In Six Textbooks And An Analysis Of Student Errors In Fifth Grade Arithmetic, Lorenzo Groutage
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Arithmetic problems and the mastery of such problems play an important role in society as it exists today. The pressure from the public has been and is for better teaching of the basic skills. Public school teachers have often evaded this issue (2). For the past decade the emphasis has been "Why Johnny Can't Read," but it seems equally important, because of the relationship of reading and arithmetic, that the focus also center on the mathematical phase of education (8).
Pfaffian Differential Expressions And Equations, K. Raman Unni
Pfaffian Differential Expressions And Equations, K. Raman Unni
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
It is needless to point out the necessity and the importance of the study of Pfaffian differential expressions and equations. While it is interesting to consider from the pure mathematical point of view, their applications in many branches of applied mathematics are well known. To mention a few, one may observe that they arise in connection with line integrals (example, determination of work). They provide a more rational formulation of the foundations of thermodynamics as developed by the Greek mathematician Caratheodory. They also arise in the problem of determining the orthogonal trajectories. In many branches of engineering and other physical …
The Effects Of Certain Environmental And Biological Factors On Rally Calling In The Chukar Partridge, H. Warrington Williams
The Effects Of Certain Environmental And Biological Factors On Rally Calling In The Chukar Partridge, H. Warrington Williams
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Naturalists for many years have known that birds sing most at dawn and at dusk, but to which of many physical variables they are responding has not been completely determined. This problem has taken on importance in the field of wildlife management because calling rate has been used as an index of abundance for numerous game birds, namely the Pheasant, Phasianus colchicus (Kimball, 1949); the Mourning Dove, Zenaidura macroura (McClure, 1939); the Bobwhite Quail, Colinus virginianus (Bennitt, 1951; Rosene, 1957): and the Woodcock, Philohela minor (Pitelka, 1943).
A Generalization Of The Rayleigh Distribution, Ruth H. Lemon
A Generalization Of The Rayleigh Distribution, Ruth H. Lemon
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This papers is divided into numbered sections. The equations are numbered anew in each section, and equation numbers are always enclosed in parentheses. Merely the equation number is given when referring to an equation in the same section as the references; otherwise the section number is prefixed. Thus equation (4) refers to the fourth equation of the same section as the reference, and equation (2.2) refers to the second equation of the second section.