Physical Sciences and Mathematics Commons^™

Inductance

Calculus-Based General Physics

Anyone who has ever grabbed an automobile spark-pluq wire at the wrong place, with the engine running, has an appreciation of the ability of a changinq current in (part of) a coil of wire to induce an emf in the coil. What happens is that the breaker contacts open, suddenly interrupting the current, and causing a sudden large change in the magnetic field through the coil; according to Faraday's law, this results in a (large) induced emf. In general, the production of an emf in a coil by a changing magnetic field due to a current in that same coil …

Impulse And Momentum

Calculus-Based General Physics

You have already learned that you stub your toe harder trying to kick larger masses. Now imagine another unpleasant activity: catching a bowling ball. This gets harder to do as the ball is dropped from higher places. The difficulty depends both on the ball's mass and its velocity just before you apply the stopping force. This force can be applied in different ways. Any winner of an egg-throwing contest will tell you the way to stop an object with the least force is to spread the stopping process out over a maximum time.

This module will develop the above "folk …

Middle And Late Cenozoic Tapirs From Nebraska, C. Bertrand Schultz, Larry D. Martin, R. George Corner

Bulletin of the University of Nebraska State Museum

The distribution and evolution of Late Cenozoic tapirs are discussed and the forms present in Nebraska are reported. Two new species are described from the Ogallala Pliocene of Nebraska, ?Tapirus johnsoni and ?T. simpsoni. Tapirs are known in Nebraska from the Early Oligocene through the Middle Pleistocene. The northern limit of the distribution of the tapirs contracts gradually southward in North America throughout the Tertiary, and even during the Pleistocene interglacials Nebraska must have been near the northern limit of their range.

A Guide To What, How, Why And Why Not Of Psi, Vernon Williams, Robert Fuller, David Joseph

Personalized System of Instruction (PSI), or Keller Plan, Materials

The production and distribution of the film, Personalized System of Instruction: An Alternative, © 1973, by the Instructional Media Center of the University of Nebraska Lincoln was met with considerable interest among academics in the USA. A one time the film lending library had 24 copies of the film that were is almost continuous distribution in the early 1970s.

The film lead viewers to ask many questions and the Instructional Media Center got many requests for additional information. In response to that need, Vernon Williams of the Teaching and Learning Center and Professors Robert Fuller and David Joseph of …

Response Of Nuclear Emulsions To Ionizing Radiations, Robert Katz, F. E. Pinkerton

Robert Katz Publications

Heavy ion tracks in Ilford K-2 emulsion are simulated with a computer program that makes use of the delta-ray theory of track structure, and the special assumption that the response of the emulsion to gamma-rays is 8-or-more hit. The Ilford K-series of nuclear emulsions is produced from a parent stock called K.0 emulsion, sensitized to become K.1 to K.5, and desensitized to become K–1 to K–3. Our simulations demonstrate that the emulsions K.5 through K.0 to K-1 are 1-or-more hit detectors, while K-2 is an 8-or-more hit detector. We have no data for K-3 emulsion. It would appear that emulsions …

Principles Of Radioisotope Methodology, Gary Rothwell

Honors Theses

This honors project was designed for familiarization with modern instrumentation and experimentation methods for radioisotope detection and energy calculations. The two main instruments I studied were the Geiger-Mueller Counter and a single channel pulse height analyzer. This report will include a brief history of radiation and a description of the more important types. Next is a description of the two instruments mentioned and some simple experiments I conducted using them.

A Piagetian Approach To General Chemistry, Donald W. Beistel

Chemistry Faculty Research & Creative Works

No abstract provided.

La Utilización De La Energía Solar, Aldemaro Romero Jr.

Publications and Research

No abstract provided.

Una Roca Lunar En Barcelona, Aldemaro Romero Jr.

Publications and Research

No abstract provided.

Process Control Of Activated Sludge Treatment, Phase Ii, Richard I. Kermode, Robert W. J. Brett, Joseph D. Pault Jr.

KWRRI Research Reports

Material balances on substrate and microorganisms were derived in conjunction with various mixing configurations thought to accurately describe the activated sludge process. These models include the completely mixed with bypass, plug flow, and plug flow with bypass. Two sets of kinetic mechanisms for substrate utilization and bacterial growth were employed.

A feed forward controller was designed from linear approximations of the material balances derived in the completely mixed with bypass mixing model. Utilizing frequency response methods, the controller was found essentially identical to a completely mixed modeled controller developed in a prior investigation.

Through computer simulation the controller's effectiveness was …

Stochastic Simulation Of Daily Rainfall, David M. Allen, C. T. Haan, Don Linton, Jim Street, David Jordan

KWRRI Research Reports

The design of many water resources projects requires knowledge of possible long-term rainfall patterns. In this project a stochastic model based on a first order Markov chain was developed to simulate daily rainfall at a point. The model is applicable to any point in Kentucky (and other areas with similar rainfall patterns).

The model in its present form is useful in providing rainfall inputs into hydrologic models for designing water supply facilities and other water resources systems. The model uses historical rainfall data to estimate the Markov transitional probabilities. A separate matrix is estimated for each month of the year. …

Sensitivity Of Vertebrate Embryos To Heavy Metals As A Criterion Of Water Quality, Phase Ii: Bioassay Procedures Using Developmental Stages As Test Organisms, Wesley J. Birge, Albert G. Westerman, Jeffrey A. Black, Oliver W. Roberts

KWRRI Research Reports

Chick, amphibian, and fish embryos were evaluated as bioassay and bioindicator organisms. Test procedures were developed by which embryonic stages may be used 1) in bioassay systems to evaluate the toxicity of particular metallic or metal-containing trace contaminants, and 20 as bioindicators to monitor the quality of natural water resources.

A bioassay technique was devised in which metallic toxicants were administered to chick embryos by "needle tract" injection into the yolk sac. This provided more uniform distribution of test metals throughout the yolk mass than can be obtained by conventional yolk sac injection methods, and gave more sensitivity and uniformity …

Temperature-Dependence Of Electron Mean Free Paths In Tungsten, Paul D. Hambourger

Physics Faculty Publications

No abstract provided.

Thermal Plume Entrainment Of Ichthyoplankton At The Vepco Surry Nuclear Power Station : Progress Report, October 1975, John V. Merriner, A. Deane Estes

Reports

Plume entrainment studies at Vepco Nuclear Power Plant located near Surry, Virginia were initiated in August, 1975 by the Ichthyology department of Virginia Institute of Marine Science. The program was undertaken to define the amount and kinds of fish eggs and larvae that are. present in the Cobham Bay area of the James River and become entrained by the heated effluent.

An Assessment Of Acute Impacts Of The James River/ Windmill Point Habitat Development Site On The Macrobenthic Connnunity: Interim Report, Robert J. Diaz, Donald F. Boesch

Reports

No abstract provided.

Shoreline Situation Report New Kent, King William, And King And Queen Counties, Carl H. Hobbs Iii, Margaret H. Peoples, Gary L. Anderson, Peter Rosen, Robert J. Byrne, John M. Zeigler

Reports

No abstract provided.

Analyses Of Sediment And Elutriate Sample From The James River, Virginia, R. J. Huggett

Reports

No abstract provided.

Report On Environmental Effects Of The Second Hampton Roads Bridge-Tunnel Construction : Sediment Distributions And Bottom Characteristic, John D. Boon, George R. Thomas

Reports

Geological observations over a two year period July-December 1973 and January-November 1974.

Surface Electromagnetic Waves On Layered Systems With Damping, C. A. Ward, Ralph William Alexander, Robert John Bell

Physics Faculty Research & Creative Works

The Dispersion Curves, Propagation Distances, and Poynting Vectors of Surface Electromagnetic Waves Propagating on a System of Cu-Cu2O-Air with Variable Film Thickness Have Been Calculated using the Full Dispersion Realation Including Damping. Double-Dip Structure in the Propagation Distance for Intermediately Thick overlayers, the Shifting of One Dip Below ΣTO, and the Presence of the Other Dip at ΣLO Are Explained in Terms of Features of the Dispersion Curve. the Complete Poynting-Vector Calculations Show that Predictions of Field Bunching at ΣLO Are Probably in Error. © 1975 the American Physical Society.

Double Reflection Dips From Grating Ruled Semiconductors, L. F. Teng, Ralph William Alexander, Robert John Bell, B. Fischer

Physics Faculty Research & Creative Works

The Double Reflectivity Dips, Previously Observed by Fischer Et Al. and Anderson Et Al., Which Appeared in the Reflection Spectra of Grating Surfaces On, the Te‐doped Semiconductors GaAs and InSb Around Both the Plasmon and Phonon Frequencies Have Been Measured in More Detail. in the Plasmon Region, Several Possible Explanations of the Phenomenon Are Discussed, But the Favored Explanation Involves Surface Damage. a Simple Two‐region Reflectivity Equation Checked with a Rigorous Grating Theory is Proposed and is Shown to Fit the Data Well. Copyright © 1975 WILEY‐VCH Verlag GmbH & Co. KGaA

Multimedia Dispersion Relation For Surface Electromagnetic Waves, C. A. Ward, K. Bhasin, Robert John Bell, Ralph William Alexander, I. Tyler

Physics Faculty Research & Creative Works

We Have Derived a General, N-Media Dispersion Relation for Surface Electromagnetic Waves Propagating on Isotropic Layers with Complex Dielectric Functions. the Equation is Presented in a Convenient, Compact Form for Ease of Application. Copyright © 1975 American Institute of Physics.

Interactions Of Rhenium(V) Chloride And Oxotrichlorobis(Triphenlyphosphine)Rhenium(V) With Selected Solvents, Paul Luther Holm

Electronic Theses and Dissertations

The purpose of this study was to examine the solution interactions of rhenium(V) chloride and oxotrichlorobis(triphenylphosphine)rhenium(V) in a continuation of studies of rhenium(V) chemistry. These goals were accomplished using vacuum line and Schlenk tube techniques. As a result of this work, rhenium(V) chloride was found to dissolve with reaction in 1, 4-dioxane, diethyl ether and acetone. There was only a very small amount of rhenium(V) chloride which dissolved in carbon tetrachloride, chloroform and cyclohexane. Part of what did dissolve was shown by electronic and infrared spectroscopy to be oxotetrachlororhenium(VI) which was present as an impurity in small amounts. Oxotetrachlororhenium(VI) reacts …

Mechanistic Studies Of Alkylation Of Cobalt(I) By Cyclopropyl Derivatives, Lailing Magdalene Soong

Masters Theses

A second order nucleophilic substitution reaction with retention of configuration is predicted by Ugi and co-workers if electrophiles such as cyclopropyl, cyclobutyl, or cyclopentyl derivatives undergo substitution under conditions where the S_N2 process is faster than the competing S_N1 process.

A synthesis of both cis and trans-7-chlorobicyclo [4.1.0] heptane from olefin and dichlorocarbene is described. The compound, bicyclo [4.1.0] heptylpyridine [bis(salicylaldehyde)ethylenediiminato] cobalt(III), which contains an alkylcobalt σ-bond, is obtained from the reaction of pyridine [bis(salicylaldehyde)ethylenediiminato] cobalt(I) and 7-chlorobicyclo [4.1.0] heptane. The great light sensitivity of this compound has prevented its isolation in purity sufficient for nmr …

Occurrence Of The Puma, Felis Concolor, From Svendsen Cave, Marion County, Arkansas, William L. Puckette

Journal of the Arkansas Academy of Science

A partial skeleton including fragmental skull and mandibles of the puma, Felis concolor, was recovered from Svendsen Cave, Marion County, Arkansas. The remains are thought to be of Late Pleistocene (Wisconsin) or Sub-recent age. Fossil records of the puma are rare and only one other Pleistocene or Sub-recent site in Arkansas, Conard Fissure, has yielded remains which could be assigned to this large felid.

Reactions Of Tungsten Carbonyl Complexes Containing Diphenylvinylphosphine, George S. Leotsakos

Masters Theses

A new synthetic route for the production of the tungsten carbonyl complex (OC)₅WPPh₂CH₂CH₂PPh₂ has been discovered. It has been found that lithiumdiphenylphosphide reacts with diphenylvinylphosphinepentacarbonyltungsten(0) in tetrahydrofuran to produce upon hydrolysis a good yield of the pentacarbonyl product […]. No evidence for the formation of secondary products was noted nor was there evidence for preferential attack of the carbonyl group by LiPPh₂ to form a carbene complex.

Diphenylvinylphosphinepentacarbonyltungsten(0) (mp 62-64°C), was prepared for the first time by two different methods.

I. Displacement of aniline from anilinepentacarbonyltungsten(0) complex with diphenylvinylphosphine.

II. …

Raising Wood Ducks, Richard L. Nelson

Nebraska Game and Parks Commission: Publications

Numbered among Nature's most colorful creatures, wood ducks willingly accept a helping hand from man in establishing new homes. These birds adapt well to suitable habitat, and you can play an important part in bringing the wood duck to locations where they do not now nest. For groups or individuals who are willing to expend the effort necessary to undertake a wood duck restoration project anti see it to completion, it is an exceptional gift from today's generation to those of decades and centuries to come. Many areas in Nebraska provide suitable wood duck habitat, but do not have a …

A Geo-Marine Informational System For Coastal Zone Management, Stella Maris A. Vallejo

Marine Affairs Theses and Major Papers

The purpose of this paper is to present a system analysis for the evaluation and interpretation of information on coastal zone management. We understand by system analysis the consideration of a complex made by related parts, and not merely a totally of parts, where the significance of one thing depends on its relationship with the others. Based on this criteria of interconnections between phenomena, we assume, we are going to give the coastal zone a treatment of a system and in this way impose a correlative statement to the information related to this area. This system approach for the information …

Regionalization As An Effect Of Offshore Oil And Gas Exploitation: A Case Study Of The North Sea, Mark J. Chittum

Marine Affairs Theses and Major Papers

This study attempts to analyze whether oil and gas exploitation in a semi-enclosed sea will result in closer relations being developed in the region leading to the establishment of a special regime for that sea. The study area is Northwestern Europe which is centered on the North Sea. All the littoral states of Northwestern Europe have major interests in the North Sea, one of which is oil and gas exploitation. This study is developed through the examination of the activities in the North Sea, related to oil and gas production, which tend to join the region together followed by an …

Test 1196: Allis-Chalmers 7040 Ps Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS Each tractor is a production model equipped for common usage. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operator station. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures must conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crankcase is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The fuel …

Metamagnetic Behavior Of Linear Chain Pyridine Compounds: Co(Pyridine)2Cl2, Fe(Pyridine)2Cl2, Fe(Pyridine)2(Ncs)2 And Ni(Pyridine)2Cl2, S. Foner, R. B. Frankel, W. M. Reiff, B. F. Little, G. J. Long

Physics

Magnetic phase transitions in the pyridine (pyr) compounds Co(pyr)₂Cl₂, Fe(pyr)₂Cl₂, Fe(pyr)₂(NCS)₂ and Ni(pyr)₂Cl₂ have been observed at applied magnetic fields of not, vert, similar0.7, 0.7, 1.1 and 2.7 kG respectively. These low field phase transitions are observed in the Fe and Ni compounds at T = 4.2 K, and in the Co compound at T < 3K, and are consistent with metamagnetic behavior. Magnetic saturation is not achieved in any of these compounds for fields of 60 kG, reflecting high anisotropy.