NAVAL ACADEMY ANNAPOLIS MD

Electron Irradiation-Induced Defects in AlxGa1-xAs

10 JUN 88

30 pages

Authors: Wesley I. Summers; NAVAL ACADEMY ANNAPOLIS MD

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This study analyzed two Liquid Phase Epitaxy (LPE) grown AlGa1-xAS samples. One sample was electron irradiated with 1MeV electrons, the other sample was non-irradiated. The goal of this study was to see the effect of the electron irradiation and characterize any trapping states encountered. Deep Level Transient Spectroscopy (DLTS) was used to analyze the samples. Only one was encountered in the non-irradiated sample, the so called DX center 1, while ...

Development of a Criterion for the Effect on the J-R Curve of Elastic Unloadings

Authors: J. A. Joyce; NAVAL ACADEMY ANNAPOLIS MD

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A criterion is proposed which allows estimation of the fraction of cyclic damage which would be expected from a given number of partial or complete unloadings applied during the course of a J-R curve fracture toughness test. The criterion requires both geometry and material inputs, but for the special case of a steel compact specimen, an upper-bound criterion is developed and presented graphically. Data from a series of compact specimens ...

Summary of Research Academic Departments

OCT 87

Authors: Fred M. Fetrow; NAVAL ACADEMY ANNAPOLIS MD

This annual report summarizes the research work of the Naval Academy faculty and midshipmen for the period July 1986 through June 1987. Sponsored and independent research projects are listed by title, followed by the names of the investigations and an abstract. A list of publications and their abstracts are included as well as presentations at professional meetings, conferences, and seminars. Contents: Division of Engineering and Weapons; Division of English and ...

Failure Modes in Composite Materials

19 MAY 87

Authors: David A. Robinson; NAVAL ACADEMY ANNAPOLIS MD

Presently in all types of materials, mechanical stiffness is an important qualitative and quantitative measure of structural integrity. When a material is repeatedly stressed, some type of internal damage is known to occur which changes the mechanical property of the matter. Although this phenomenon has been long studied in metals, it is not well understood in composites; composites tend to fail instantly with no apparent mechanical warning. It, as is ...

Optical Measurement of the RMS (Root-Mean-Square) Roughness of Ion- Bombarded Surfaces

19 MAY 87

Authors: Charles D. Ferguson; NAVAL ACADEMY ANNAPOLIS MD

Ion implantation and related ion beam processing techniques are used to modify the surface of materials and produce certain desirable properties. However, these methods sometimes roughen the surfaces to which they are applied. If undetected, such roughness can lead to erroneous interpretation of data gathered by most standard surface analysis techniques. Many surface profilometers and scanning electron microscopes lack sufficient spatial resolution to detect fine scale roughness that can complicate ...

Development of a Tissue Equivalent Proportional Counter System for the Measurement of Neutron Dose

19 MAY 87

Authors: Roger J. Hilarides; NAVAL ACADEMY ANNAPOLIS MD

This paper describes a neutron-gamma dose measurement system utilizing a Tissue Equivalent Proportional Counter (TEPC). A multi-channel analyzer acquires the data and sends it to a personal computer for analysis on a spreadsheet. The system yields information on lineal energy, absorbed dose, quality factor and dose equivalent for different neutron-gamma sources. Results are presented which compare the response of the TEPC system to a thermoluminescent detector (TLD), neutron remmeter (AN/PDR-70), ...

A Knowledge Based System for Piloting an Autonomous Land Vehicle

19 MAY 87

Authors: John P. Mellor; NAVAL ACADEMY ANNAPOLIS MD

The objective of this project was to construct a simulation consisting of a model of the world and a model of a vehicle. The simulation was constructed using object oriented programming and because of its structure facilitates a dynamic world, multiple vehicles, learning, reasoning about time, and incremental development of the vehicle and world. In addition, the pilot uses three dimensional information for path planning. With the exception of this ...

A Trade-Off Study of Sonar Performance and Powering Requirements for Unconventional Sonar Domes

19 MAY 87

Authors: Jennifer Culbertson; NAVAL ACADEMY ANNAPOLIS MD

The results of an investigation of the resistance characteristics and powering requirements of unconventional sonar domes are presented and discussed. The sonar dome designs evaluated were below-baseline domes incorporating long prismatic sections designed to house large planar passive arrays. The cross- sectional area, and the longitudinal length of the domes were systematically varied. The predicted powering requirements for a parent destroyer hull form appended with different designs of sonar domes ...

Analysis of Glint Patterns Using Remote Sensing Techniques

19 MAY 87

Authors: Deborah D. Klatt; NAVAL ACADEMY ANNAPOLIS MD

A laboratory simulation of the spiral eddies viewed from the space shuttle Challenger on the STS 41-G mission was constructed. The construction allowed for collection of quantitative data coincident with the recording of any surface structure on polaroid film. A spiral flow was introduced into a test region, and the spiral nature of the flow verified by the plot of horizontal current velocity measurements. No manifestation of this flow, however, ...

Nuclear Magnetic Resonance in Gallium Arsenide

19 MAY 87

Authors: Michael F. Finch; NAVAL ACADEMY ANNAPOLIS MD

Nuclear Magnetic Resonance (NMR) lineshapes of 69Ga in GaAs:In were studied for two different levels of indium dopant. The lineshapes were developed by fourier analysis of the spin echoes. First order quadrupole effects manifested themselves as wings in the lineshapes. As expected the wings were larger in the more heavily doped sample. The dependence of the second moment of the lineshapes on the orientation of the crystal in the field ...

Lectures on Advanced Technologies

383 pages

Authors: Arthur E. Bock; NAVAL ACADEMY ANNAPOLIS MD

These papers were selected from those presented in the 1985-86 and 1986-87 Naval Academy Advanced Technologies Seminar Series. These interdisciplinary seminars were presented at approximately monthly intervals to faculty and midshipmen. The topics presented were those deemed to have particular relevance to the Navy in either its short-term or long-term planning. Papers include: Development of the Curtiss Wright V/STOL airplane; Introducing new technology into the Navy; Automation, robotics and naval ...

Summary of Research Academic Departments, 1985-1986

OCT 86

Authors: Fred M. Fetrow; NAVAL ACADEMY ANNAPOLIS MD

This annual report summarizes the research work of the Naval Academy faculty and midshipmen for the period July 1985 through June 1986. Sponsored and independent research projects are listed by title, followed by the names of the investigators and an abstract. A list of publications and their abstracts are included as well as presentations at professional meetings, conferences and seminars.

A Computer Simulation of Detonation within an Energetic Molecular Crystal

11 JUL 86

Authors: Alan D. Boyd; NAVAL ACADEMY ANNAPOLIS MD

The study of detonation has been based upon hydrodynamic theory. This view of detonation completely ignores the actual chemistry of the explosive reaction. Therefore, the dynamics of detonation on a molecular level remain unknown. The purpose of this project is to use a computer to investigate the propagation of detonation through a crystal. Research in this area is hindered by the fact that monitoring instruments are destroyed in actual detonations. ...

Ion Conducting Polymers as Solid Electrolytes

28 MAY 86

Authors: Jeffrey D. Semancik; NAVAL ACADEMY ANNAPOLIS MD

Electrically conducting polymers have recently been the subject of much interest. In particular, their potential as electrolytes in solid-state batteries has gained the attention of the U.S. Navy. Current ion-conducting polymers have conductivities which are too low by a factor of ten at operational temperatures. In order to be able to obtain suitable conductivities in these polymers, a thorough understanding of the mechanisms governing ion motion in them must be ...

Environmental Effects on Impact Damage Tolerance of Hybrid Composite Material

28 MAY 86

56 pages

Authors: Lawrence E. Wood; NAVAL ACADEMY ANNAPOLIS MD

The behavior of an intraply hybrid composite material of polyethylene and graphite fibers in an epoxy matrix under the effects of environmental conditioning, impact damage, and fatigue loading was investigated. Although the ultimate tensile strength of the hybrid material was found to be lower than that of graphite material alone, the specific strengths of the materials were comparable. Dye-penetrant enhanced X-ray radiography and edge replication were used to evaluate the ...

An Investigation of the Hydrodynamic Characteristics of Non-Axisymmetric Bow Shapes for Submarines

28 MAY 86

Authors: John V. De Nuto; NAVAL ACADEMY ANNAPOLIS MD

This report presents the results of an investigation into the resistance and flow characteristics of a series of unconventional bow forms for a body of revolution submarine. A series of five different bow forms was developed and tested. Three of these bow forms were non-axisymmetric and two were axisymmetric. One non-axisymmetric model served as the baseline and the other two varied in length. The axisymmetric submarine models were designed and ...

Analysis of Surface Patterns over Cobb Seamount Using Synthetic-Aperture Radar Imagery

27 MAY 86

Authors: Clark B. Freise; NAVAL ACADEMY ANNAPOLIS MD

Anomolies in surface wave patterns observed on SEASAT Synthetic- Aperture Radar (SAR) imagery over Cobb Seamount are examined. These anomalies are the surface expression of currents interacting with the seamount. The wavelength of the imaged surface patterns are extracted with advanced SAR digital image processing techniques. Nine of the ten detected wavelengths match the expected spectral wavelength envelope of the internal waves that are calculated using oceanographic data. The results ...

Kinetics Modeling of Cancer Immunology

09 MAY 86

Authors: Scott W. Helmers; NAVAL ACADEMY ANNAPOLIS MD

In the presence of antibody, some cancerous antigens have demonstrated a unique mechanism of immunological escape. The mechanism by which these tumors avoid immune destruction is to constantly change their antigen surface, thus preventing the immune system from effectively completing its response to a given antigen. The exact means by which these tumor cells change their antigen surface is unknown. In this study, a kinetics model for an immune response ...

The Romantics and Their Shakespeare

1986

147 pages

Authors: Mark D. Larabee; NAVAL ACADEMY ANNAPOLIS MD

A consequence of the Romantic movement was a profound preoccupation with "character"--the desire to understand the human psyche through the exploration of personalities created through literature. Authors and playwrights of the Romantic era turned to Shakespeare's works, both to seek inspiration for their own efforts, and to attempt a comprehension of the many rich and complex characters of Shakespeare's own creation. One result of this fascination with Shakespeare was the ...

ENVIRONMENTAL EFFECTS ON IMPACT DAMAGE TOLERANCE OF HYBRID COMPOSITE MATERIAL.

1986

Authors: L. E. Wood; NAVAL ACADEMY ANNAPOLIS MD

Summary of Research Academic Departments, 1984-1985

OCT 85

Authors: Wilson L. Heflin; NAVAL ACADEMY ANNAPOLIS MD

This publication was compiled to acquaint the reader with faculty and midshipmen research efforts being done behind the classroom scene. Research results are published in manuscripts, reports, and prestigious journals as well as presented at important professional meetings and conferences. In addition to their teaching and research, the faculty contribute to their profession through participation in professional societies and consulting activities. This publication contains summaries of completed and on-going faculty ...

Optimization of Bow-Bulb Forms for Resistance and Seakeeping Characteristics

20 MAY 85

Authors: J. W. Hoyle; NAVAL ACADEMY ANNAPOLIS MD

This report presents the results of an investigation of bulbous bows for fine form ships conducted as a Trident Scholar research project. Nine different bulbs were designed for the OLIVER HAZARD PERRY (FFG-7) Class of Ships. These bulbs varied primarily in length and breadth and were designed using a Naval Sea Systems Command application of the Kracht bulb design curves. Resistance predictions were obtained for the FFG-7 appended with eight ...

A Generalized Kinetic Model of the T-Cell Independent Primary Immune Response

13 MAY 85

Authors: R. N. Hyer; NAVAL ACADEMY ANNAPOLIS MD

A generalized kinetic model has been developed which describes the T- cell independent antibody-mediated primary immune response. Immunology is a very young science and its history is important to understand the direction of investigation of those equations which remain unsolved. The immune system itself, with all the cells, cellular products, and lymph system, is very complex, second only to the nervous system for complexity in the human body. The original ...

Investigation of Dust Associated with Shell Stars

09 MAY 85

Authors: M. S. Boehle; NAVAL ACADEMY ANNAPOLIS MD

This project investigated the association of dust with shell stars. Shell stars are identified by emission lines in their spectra, which have been produced in a 'shell' of hot gas surrounding the star. Additional observed properties have indicated the presence of dust, but the direct association of dust with individual shell stars has not been demonstrated conclusively. The first phase of this project was designed to show the presence of ...

Reliability Methods for Ship Structures.

MAY 1985

Authors: G. J. White; B. M. Ayyub; NAVAL ACADEMY ANNAPOLIS MD

The ever increasing use of high-strength materials and advanced technologies in surface ship structural design requires a very careful and systematic analysis to insure that levels of safety are maintained. In this paper we evaluate the available methods of analysis as to their suitability for estimating the risk of structural failure in ships. The merits and shortcomings of each method are discussed and each is then used to solve a ...

Fatigue and Corrosion Fatigue of Discontinuous SiC/Al Metal Matrix Composites.

1985

Authors: D. F. Hasson; C. R. Crowe; J. S. Ahearn; D. C. Cooke; NAVAL ACADEMY ANNAPOLIS MD

This paper concerned mmc in some important way and contained information about, utilized, or discussed these subjects: basic topics:, data, dr mmc, experimental, mmc, mmc data materials and material types:, al matrix, particulates, sic whiskers, sic/al, whiskers material characteristics and data fields:, corrosion data, elongation data, failure data, fatigue, fatigue data, modulus data, uts, yield strength data parameter values relevant to the data:, t6 testing and test conditions:, sem, tem ...

Summary Reports of Naval Academy Research Council Sponsored Faculty Projects 1983-1984

NOV 84

Authors: NAVAL ACADEMY ANNAPOLIS MD

This report contains summary reports of faculty research projects selected and supported by the Naval Academy Research Council during Fiscal Year 1984. Contents includes: Argentina's Foreign Policy, Evaluation of the Heat Transfer Characteristics of the Heat Barrier Piston Engine, Modeling Navy Accessions and Reenlistment Behavior Using Pooled Cross-section and Time Series Data, Congress and the Law of Intelligence: New Directions, Purging the English Navy: An Examination of the Committee for ...

Summary of Research, Academic Departments, 1983-1984

OCT 84

Authors: W. L. Heflin; NAVAL ACADEMY ANNAPOLIS MD

This annual report summarizes the research work of the Naval Academy faculty and midshipmen for the period July 1983 through June 1984. Sponsored and independent research projects are listed by title, followed by the names of the investigators and an abstract. A list of publications and their abstracts are included as well as presentations at professional meetings, conferences, and seminars. Subjects include: Aerospace Engineering, Electrical Engineering, Mechanical Engineering, Naval Systems ...

The Effect of Controlled Pressure Changes on the Stimulation of Bioluminescence in Pyrocystis Lunula

02 JUL 1984

Authors: K. Holderied; NAVAL ACADEMY ANNAPOLIS MD

Bioluminescence in a dinoflagellate species, Pyrocystis lunula, was stimulated by controlled, repeated pressure changes. Pressure pulses of a two- second duration were used to determine their effect on stimulated bioluminescene. Observations of organism sensitivity in response to the circadian rhythm, light phase, and cell fatigue were also made. The pressure change was affected by valve-regulated compressed air. The luminescence was detected with a photomultiplier tube. The mean threshold for luminescence ...

Synthesis of Stereoisomeric - Metal Complexes Using Phase-Transfer Catalysis and Photochemical Transforms

25 MAY 1984

Authors: D. J. Brown; NAVAL ACADEMY ANNAPOLIS MD

Cyclopentadienyl carbonyl complexes of iron and ruthenium have been shown to have broad applications in organic synthesis. The viability of these complexes as intermediates is dependent upon convenient and rapid synthetic routes for their preparation. This research has primarily been directed towards the extension of phase-transfer techniques to the preparation of iron and ruthenium allyl and crotyl complexes. In addition, the synthesis of iron and ruthenium olefin complexes by photochemical ...

Variations with Time of the Carbon Dioxide Partial Pressure in Central and South Atlantic Surface Waters

25 MAY 1984

29 pages

Authors: B. Lipphardt Jr; NAVAL ACADEMY ANNAPOLIS MD

Increasing levels of atmospheric carbon dioxide have been hypothesized to cause future gobal warming as a result of an enhanced greenhouse effect. Man is responsible for the addition of caron dioxide to the atmosphere through the burning of fossil fuels and the removal of vegetation from the continents. Future climatic changes caused by a global warming are of governmental concern because of their economic impact, and possible future restrictions on ...

Summary of Research, Academic Departments, 1982-1983

OCT 1983

Authors: W. L. Heflin; NAVAL ACADEMY ANNAPOLIS MD

This annual report summaries the research work of the Naval Academy faculty and midshipmen for the period July 1982 through June 1983. Sponsored and independent research projects are listed by title, followed by the names of the investigators and an abstract. A list of publications and their abstracts are included as well as presentations at professional meetings, conferences, and seminars. (Author)

A Transient Wave Generation Technique and Some Engineering Applications,

AUG 1983

Authors: J. O. Salsich; B. Johnson; C. Holton; NAVAL ACADEMY ANNAPOLIS MD

Another method has been developed for generating transient waves using the dispersion relationship of water waves. This technique consists of generating a drive signal which combines decreasing frequency with an exponentially increasing amplitude of specified form. The resulting wave energy which is focused at some point downstream of the wavemaker can result in some nonlinear, asymmetric, and/or breaking waves occuring repeatably at the same location in the tank. Location of ...

Stability Enhancement of a Flexible Robot Manipulator

24 JUN 1983

Authors: Thomas D. Looke; NAVAL ACADEMY ANNAPOLIS MD

A computer software programming technique was developed to compensate a highly oscillatory robot system controlled by a bang-bang input. The assumptions that the system was linear and had lumped parameter characteristics allowed a fifth order, simplified dynamic model to be derived. Analysis using frequency response methods led to further simplification of the model to a third order system. Based on the third order model, a technique was developed which would ...

Determination of Individual Temperatures and Luminosities in Eclipsing Binary Star Systems

20 JUN 1983

Authors: Robert M. Campbell; NAVAL ACADEMY ANNAPOLIS MD

The purpose of this project was to determine the temperatures and luminosities of the individual components of eclipsing binary star systems. The information was gained by UBV photometry of a system at total eclipse and at a time outside eclipse. The light at totality is due entirely to the occulting star, and outside eclipse, both stars contribute fully. A method is derived for subtracting out the light of the occulting ...

Optical Excitation of Trapping States in Fe Doped InP

20 JUN 1983

Authors: Jack Giessner; NAVAL ACADEMY ANNAPOLIS MD

The knowledge that defect states affect the performance and speed of semiconductors is well known. Defect and trapping states are categorized according to their sex (hole or electron trap), energy in the gap and capture cross sections. The Deep Level Transient Spectroscopy (DLTS) technique that is useful for electrical pulsing, becomes increasingly profitable using optical pulsing. The optical pulsing was accomplished using a simple, but efficient, infrared light emitting diode ...

Milton and the 'New Philosophy': An Historical-Literary Exploration of the Relationship between Science and the Humanities in the 17th Century

20 JUN 1983

Authors: Mark L. Gorenflo; NAVAL ACADEMY ANNAPOLIS MD

In our present age, when science and technology advances at a rate which seriously challenges man's ability to properly incorporate these developments in his society, the relationship between the principles and objects of empirical science and those of humanistic studies has come under close and critical scrutiny. Modern society, however, is not unique in facing this dilemma. Seventeenth century England, where an empirical approach to the world was new and ...

Propeller Cavitation Effects on Broadband Vessel-Radiated Acoustic Spectra

20 JUN 1983

Authors: Daniel N. Dixon; NAVAL ACADEMY ANNAPOLIS MD

To gain an understanding of ambient noise in the oceans today, the characteristics of merchant vessel acoustic spectra must be determined. Presently, it is believed that the major source of acoustic intensity emanating from a merchant is propeller noise. Data was gathered from a stationary vessel whose propellers were cavitating to determine exactly how much of the far field spectrum was propeller dominated. Considerations such as propagation delay and multi-path ...

Surface Energies and Chemical Analysis of the Initial Stages of Marine Microbiological Fouling

20 JUN 1983

Authors: Mark Jarl Olson; NAVAL ACADEMY ANNAPOLIS MD

Marine biological fouling is a complex, successive process which can severely impair the performance of marine vessels. A series of three interrelated experiments were conducted which analyzed the initial stages of marine microbiological fouling in the Severn River estuary. Glass microscope slides were exposed to natural fouling organisms at sampling stations located along the length of the estuary. Results of the analysis showed low fouling to occur in waters which ...

The Design of an Experimental Apparatus to Measure the Motions of a Towed Submersible Environmental Sensor Vehicle

JUN 1983

249 pages

Authors: Robert A. Granger; NAVAL ACADEMY ANNAPOLIS MD

An experimental investigation of the motions of a towed submersible sensing vehicle due to external forcing functions of surge and heave is made. Using the U.S. Naval Academy's high speed tow tank facility, experiments were conducted using a half scale model of a current NCSC towed vehicle in which was carried a motion measurement package that measured pitch, roll, yaw, longitudinal and vertical accelerations. Surge and heave displacements at various ...

The Synthesis of Potentially Catalytic Bimetallic Systems

29 NOV 1982

Authors: Michael J. Golightly; NAVAL ACADEMY ANNAPOLIS MD

Work this year has focused on the development of a synthetic sequence to the double metal system shown in Figure XIV which incorporates ferrocene as the backbone of the molecule. Such systems have the potential for hydrogen evolution from acidic solutions. A route to the synthesis of 1'- benzylferrocenecarbinol (XIII), involving the diketone intermediate 1-benzoyl- 1'-o-chlorobenzoyl-ferrocene (XXIII) is discussed. XIII is used to synthesize the novel double metal compounds 1'-benzylferrocenecarbinol ...

Summary of Research Activities Academic Departments 1981-1982

OCT 1982

Authors: Wilson L. Heflin; NAVAL ACADEMY ANNAPOLIS MD

This annual report summarizes the research work of the Naval Academy Faculty and midshipmen for the period July 1981 through June 1982. Sponsored and independent research projects are listed by title, followed by the names of the investigators and an abstract. A list of publications and their abstracts are included as well as presentations at professional meetings, conferences, and seminars. (author)

Performance Optimization of a Pneumatic Wave Energy Conversion Device

26 AUG 1982

Authors: Stehen W. Surko; NAVAL ACADEMY ANNAPOLIS MD

The purpose of this study was, for the first time, to optimize the performance of a pneumatic wave energy conversion device. The experiments of Jolly and Newmaster (1979) and Trop and Casey (1980) left a capture chamber and turbine for further investigation. To optimize the system performance the turbine had to be first analyzed so that its power performance curves could be determined. These curves were needed to help define ...

Synthesis of Azuloquinones as an Experimental Determination for a Theoretical Prediction

29 JUL 1982

Authors: Joseph L. Donovan; NAVAL ACADEMY ANNAPOLIS MD

Quinones are chemical compounds utilized throughout naturally occurring biological systems in energy-transferring reduction/oxidation reactions. Quinones are also being tested in the area of anti-tumor agents. Azuloquinones are unknown quinones which may provide the specific energy that may match metabolic values. Azuloquinone is a compound that has received a great deal of attention in theoretical chemistry recently. Quantum mechanical predictions on the relative energies and stabilities of the eleven possible isomers ...

Capacitive Pressure Transducers and Pressure Fixed Points

29 JUL 1982

Authors: Frank P. Pursel; NAVAL ACADEMY ANNAPOLIS MD

SocioEconomic Characteristics of the All Volunteer Force: Evidence from the National Longitudinal Survey, 1979

FEB 1982

243 pages

Authors: J. Eric Fredland; Roger D. Little; NAVAL ACADEMY ANNAPOLIS MD

This report contains six separate, although related, studies. Each study compares young male members of the all-volunteer force as of 1979 either with men of the same age cohort who are not serving or with those too young to serve at the time of the survey. The studies are cross sectional. They address the following areas: Socioeconomic characteristics, attitudes and intentions to serve of 14 to 17 year old males, ...

Energy and the Second Law of Thermodynamics

JAN 82

60 pages

Authors: Vincent J. Lopardo; NAVAL ACADEMY ANNAPOLIS MD

The purpose of this report is to introduce the reader to the concept of energy via the previously learned concepts of reversibility and the second law of thermodynamics. Energy is first defined in general and then evaluated for energies of flowing streams, closed systems, heat transfer and work transfer. Some applications are given and then a review with application of combustion principles and the third law of thermodynamics follows. The ...

An Algebraic Approach to Empirical Science and Quantum Logic

1982

Authors: Timothy Scott Thomas; NAVAL ACADEMY ANNAPOLIS MD

This paper develops some of the work of Foulis, Randall, Aerts, and Piron in the fields of empirical science and quantum logic from an algebraic point of view. More specifically, it begins with three axioms of what is called a 'subtraction algebra,' and generates various theorems associated with properties which are useful in empirical science. After a foundation is established, it moves on to define the term manual. This term ...

The Effects of Transverse Stress on Magnetization

1982

Authors: John M. Richardson; NAVAL ACADEMY ANNAPOLIS MD

The effects of transverse stress on the magnetization of 3NiCr steel were derived and observed in terms of three separate contributions. First, the previously determined stress-effective field was examined for transverse stress, and agreed with the results obtained in past experiments. A reversal of the effects of tension and compression was predicted and observed. Second, the stress-sensitive reluctance was found to behave linearly with tensile strain. The experimentally observed slope ...

Semi-Boolean Algebras Empirical Logic and Rings

1982

Authors: Peter P. Haglich; NAVAL ACADEMY ANNAPOLIS MD

This paper presents application of semi-Boolean algebras to empirical logic and ring theory. The development of semi-Boolean algebras from subtraction algebras is shown and the identity of the two is established. Examples of subtraction algebras are given. A weakening of one of the subtraction axioms leads to a structure which is non-distributive but orthomodular. Known as orthosubtraction algebra, this structure is identical to a semi-orthomodular lattice. Since the subspaces of ...