| An Experimental Study of an Ultra-Mobile Vehicle for Off-Road Transportation |
JUL 1983 |
|
| Authors:
Robert B. McGhee; Kenneth J. Waldron; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
 | This report summarizes research accomplished during the third six- month period of this three-year project. The research is aimed at field testing of an experimental vehicle making use of actively-controlled suspension units. The current design concept envisages locomotion without the use of wheels or tracks, employing six active suspension elements, each providing support and propulsion analogously to a biological leg. This report describes a functioning breadboard leg and the associated ... |
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| An Interpretive Study of Plate and Shell Buckling |
10 JUN 1983 |
11 pages |
| Authors:
A. W. Leissa; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
 | The objective of the proposed research was to search the literature and locate all information relevant to plate and shell buckling; to collect the relevant journal articles, books, reports, theses, conference proceeding papers; to digest, summarize, organize and integrate the useful knowledge found and to make interpretative assessments; to determine problems where further research is needed; to produce a typed manuscript and ink drawings suitable for publishing a set of ... |
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| Optical Flow and Texture Variables Useful in Simulating Self Motion (II) |
JUN 1983 |
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| Authors:
Dean H. Owen; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| This report outlines a program of research applying ecological optics to the study of visual information useful for detecting and guiding self motion during flight. Techniques are presented for isolating optical sources of information by controlling simulated flight path and speed variables in conjunction with ground surface texture variables. Problems encountered in the design of experiments using higher-order ratios exhibiting constrained linkages are discussed, and several solutions are suggested. A ... |
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| Transition from Deflagration to Detonation and Effect of Heat and Mass Addition on the Parameters of a Subsonic Flow through a Duct |
JUN 1983 |
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| Authors:
R. Edse; T. D. Costello; T. Sheaf; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| The mechanism of the transition from deflagration to detonation was investigated by searching for a correlation between the detonation induction distance and various properties of the unburned mixture such as density, temperature, speed of sound, and the energy transfer to the gas behind the wave front. The magnitudes of theoretically calculated energy transfer in steady waves were compared with experimentally determined induction distances for various hydrogen-oxygen-inert gas mixtures at 1 ... |
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| A Computer Program for Consolidation and Dynamic Response Analysis of Fluid-Saturated Media |
JUN 83 |
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| Authors:
B. L. Aboustit; R. S. Sandhu; S. J. Hong; M. S. Hireath; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| A computer program was developed for evaluation of finite element models for soil consolidation and study of dynamic response of fluid-saturated soils. One-and two-dimensional consolidation problems were analyzed using different finite elements. Transient response of saturated porous elastic media for dynamic as well as quasi-static problems was studied. Results were compared with the numerical and analytical solutions available. Keywords include: Computer simulation, Consolidation, Dynamic response, Finite element method flow through ... |
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| Characterization of the Chemical Constitution and Profile of Pharmacological Activity of PGB(x) |
31 MAY 1983 |
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| Authors:
A. M. Burkman; R. W. Doskotch; D. D. Miller; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| The pharmacological studies conducted over the past four years have attempted to answer the following questions: (a) Does PGBx produce organ level effects that are expressions of PGBx's established mitochondrial actions? (b) Are the organ level effects related to PGBx's ability to act as a calcium iontophore? (c) In assessing its potential therapeutic utility, are there other actions of PGBx that are relevant? (d) Can an organ level bioassay be ... |
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| Investigation of an Error Theory for Conjoint Measurement Methodology |
MAY 1983 |
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| Authors:
Thomas E. Nygren; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| This report presents the results of an attempt to propose a basis for an error theory of conjoint measurement methodology. Conjoint measurement methodology offers a new and potentially useful approach for obtaining psychological scale values for components of multidimensional attributes. This report describes the mathematical foundations of this methodology as well as a means of evaluating the fit of an additive conjoint measurement model to a three factor design. For ... |
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| The Heteroscedastic Method: Theory and Applications |
APR 1983 |
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| Authors:
Edward J. Dudewicz; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| Statistical procedures for many problems have in the past usually, in fact almost exclusively, assumed that the random variables observed have equal variance-convariance matrices. In practice the author often finds substantially unequal variance-covariance matrices arising in such practical problems as processing signals (e.g., sonar, radio, etc.) in noise, but classically only imprecise rule-of-thumb methods, or else methods involving some loss of information, were available for these problems. Research was undertaken ... |
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| The Electrophysiologic Mechanisms of Halogenated Alkane Arrhythmogenesis |
01 MAR 1983 |
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| Authors:
S. Mark Strauch; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| Bromochlorodifluoromethane (1211) has been shown to sensitize the myocardium to the arrhythmogenic effects of adrenergic amines. Various physiologic and pharmacologic interventions were shown to modify both FC 1211 membrane effects as well as the FC 1211 sensitization process. These interventions included alternations in potassium concentration, applying stretch to Purkinje fibers, production of hypoxic conditions, alpha adrenergic effects and beta blockage of calcium mediated slow channel effects. In studies combining cyclic ... |
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| An Experimental Study of an Ultra-Mobile Vehicle for Off-Road Transportation |
FEB 1983 |
|
| Authors:
Robert B. McGhee; Kenneth J. Waldron; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| This research is concerned with computer control of terrain-adaptive suspension systems for off-road vehicles. A small-scale laboratory model walking machine has demonstrated an ability to overcome sizeable obstacles by varying limb cycles to conform to terrain. This action is achieved through the use of feedback from ground-reaction force transducers mounted at the end of each of its six legs operating in conjunction with body attitude sensing from a vertical gyro. ... |
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| Molecular Interactions of High Energy Fuels and Jet Fuels with Oncogenic Viruses and Endogenous Viruses |
FEB 1983 |
|
| Authors:
James R. Blakeslee; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| The objective of this research are to develop rapid in-vitro assays to evaluate the carcinogenic potential of chemicals used by the U.S. Air Force. Snyder-Theilen Feline Sarcoma Virus (ST FeSV), quantitatively transforms human skin fibroblasts following second order kinetics. These studies were performed in order to determine whether chemicals altered ST FeSV transformation in a predictable manner and to correlate the alteration with the carcinogenic or non- carcinogenic activity of ... |
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| Heat Transfer on Three Turbine Airfoils |
JAN 1983 |
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| Authors:
Lit S. Han; Arnon Chait; William F. Boyee; John R. Rapp; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| An experimental heat transfer program and a smoke visualization study were conducted on three turbine airfoils in a stationary cascade tunnel. The three blades with different profile shapes were scaled to have a same chord length of 21 inches; all blade models had a turning angle of 72 degrees. The ranges of the test parameters were for the Reynolds number, from 7.8 x 10 to the 5th power to 1.5 ... |
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| Transient Heat Flow Along Uni-Directional Fibers in Composites |
DEC 1982 |
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| Authors:
Lit S. Han; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| For uni-directional fibrous composites and laminated composites, a heat-balance integral method has been developed for the analysis of transient heat flow along the fibers or in the plane of laminates. The method is based on the construction of, for the two constituent media, temperature profiles which not only satisfy the necessary boundary conditions but also fulfill the asymptotic error function properties when inter-region conduction is vanishingly small or at very ... |
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| Advances and Trends in Plate Buckling Research |
DEC 1982 |
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| Authors:
Arthur W. Leissa; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| Recent advances and current trends in plate buckling research are summarized. The field is divided into three parts: (1) classical buckling studies, including plates of rectangular, circular and other shapes; (2) classical complicating effects, including elastic foundation, anisotropic material, variable thickness, shear deformation and nonhomogeneous material and; (3) nonclassical considerations, including postbuckling, imperfections, parametric excitation, follower forces, magnetoelastic buckling and inelastic buckling. Approximately 100 references for the period 1978-present are ... |
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| Chemical Carcinogen-Induced Changes in tRNA Metabolism in Human Cells |
NOV 1982 |
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| Authors:
Ronald W. Trewyn; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| It was demonstrated that the nucleic acid catabolite 7-methylguanine (a major product of many carcinogen methylation reactions as well as a natural component of RNA) modulates tRNA modification by inducing queuine hypomodification. Phorbol ester tumor promoters were found to induce similar TRNA changes immediately preceding major phenotypic alterations in cultured human cells. Culture conditions were defined which allow normal human cells to mimic in vitro transformation in the continuous presence ... |
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| Chemical and Molecular Biological Aspects of Alkylhydrazine-Induced Carcinogenesis in Human Cells in vitro |
NOV 1982 |
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| Authors:
Donald T. Witiak; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| A cation exchange HPLC technique was developed which is rapid and provides a high resolution of pyrimidine oligonulceotides, methylated purines and a methylated pyrimidine. Treatment of asynchronous cells at a low dose of 1, 1-DMH 1,2-DMH or treatment of synchronized cells at a transforming dose of 1,1- DMH did not increase the methylation of purine bases. However, a dose dependent increase in incorporation of radiolabel into DNA is observed. The ... |
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| Optical Transformation during Movement: Review of the Optical Concomitants of Egomotion |
OCT 1982 |
80 pages |
| Authors:
Rik Warren; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| The primary goals of this report are to make the formal mathematical descriptions of the optical concomitants of rectilinear self-motion through the environment more useful by consolidating, clarifying, and extending them. The report includes: (1) a critical review of the literature on the optical bases for the perception of rectilinear self-motion, (2) an outline of a comprehensive framework for the study of self-motion perception based on J. J. Gibson's ecological ... |
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| Chemical Carcinogen (Hydrazine et al.) Induced Carcinogenesis of Human Diploid Cells in Vitro |
07 SEP 1982 |
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| Authors:
G. Milo; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| Polynuclear hydrocarbons or hydrazine analogues do not have an absolute requirement for binding to DNA in order to elicit a carcinogenic event. Furthermore, PNH like BP enter the nucleus via a lipoprotein complex where the BP is oxygenated and then interacts with the genetic material,(DNA). The adduct formed is 7 beta-BPEDI-dG. Benzamide does not alter the binding of the perceived ultimate carcinogen to dG but eliminates the carcinogenic response. The ... |
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| Packing of Oxide Ceramic Powders by Centrifugal Casting |
SEP 1982 |
101 pages |
| Authors:
G. W. Shaffer; D. W. Readey; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| Topical commercially available powders of silica, zinc oxide, tin oxide, and alumina were centrifugally cast. The purpose of the study was to determine the feasibility of centrifugal casting well-dispersed slips of such ceramic oxide powders to obtain high green densities and to observe the effects that deviations from an ideal monodisperse, spherical powder have on the resulting packing density. The powders were characterized by particle size distributions and microscopy. Viscosity ... |
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| Immune Dysfunctions and Abrogation of the Inflammatory Response by Environmental Chemicals |
SEP 1982 |
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| Authors:
Richard G. Olsen; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| During the past year we have further characterized the immunotoxic effects of 1,1-dimethylhydrazine (UDMH). Evidence has been accumulated which indicates that UDMAH interferes with the regulatory arm of the immune system at low dose or concentration levels. Results from earlier experiments which supported this conclusion included: increased Jerne plaque response in UDMH- treated mice; abrogation of concanabalin A-induced suppressor activity following in vivo or in vitro UDMH exposure; and enhancement ... |
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| Development of a Vaccine against the Lethal Exotoxin of Pseudomonas aeruginosa |
31 AUG 1982 |
6 pages |
| Authors:
Neil R. Baker; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| The purpose of this project has been to produce non-toxic immunogenice fragments of exotoxin A from Pseudomonas aeruginosa for use in a vaccine. Initially, three phases of the project were identified. Phase I involved screening proteolytic agents for their ability to fragment the toxin and identifying non-toxic fragments. Phase II involved scaling-up the operation to produce larger quantities of non-toxic fragments and immunization of animals. Phase III deals with evaluation ... |
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| An Experimental Study of an Ultra-Mobile Vehicle for Off-Road Transportation |
AUG 1982 |
|
| Authors:
Robert B. McGhee; Kenneth J. Waldron; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| This report summarizes research accomplished during the first six months of a project aimed at field testing of an experimental vehicle making use of an actively controlled suspension system for improved off-road mobility. The first year of this project involves component evaluation and concept verification with reduced-scale laboratory models. Preliminary test results and projections of performance to be expected in the full-scale vehicle are included in this report. (Author) ... |
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| Design Study for an Actively Terrain-Adaptive Off-Road Vehicle |
03 JUN 1982 |
|
| Authors:
Robert B. McGhee; Kenneth J. Waldron; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| This project consisted of studies directed at establishing the feasibility of building a practical vehicle using fully adaptive legged locomotion. The objective of building such a vehicle is mobility in extreme rough terrain conditions. New technologies essential to feasibility include computer control of leg coordination, efficient power transmission for coordinated motion of large numbers of mechanical degrees of freedom, development of terrain sensing systems and utilization of the information provided ... |
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| Semiconductor Spatial Light Modulators |
JUN 1982 |
|
| Authors:
Gianfranco Gerosa; Jose A. Maiz; Wisik Min; Stuart A. Collins Jr.; Marlin O. Thurston; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| The objective of this research was to evaluate techniques for modulating or switching one beam of light with another. The processes investigated were free carrier Faraday rotation, sensor-controlled optical emission, modulation of magnetic bubble diameter, selective pumping of an excited states in garnet with circularly polarized light, and modulation of optical absorption in silicon by pumping hole states. In the last method a control beam of wavelength was used to ... |
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| The Electrophysiologic Mechanisms of Halogenated Alkane Arrhythmogenesis |
28 MAY 1982 |
|
| Authors:
S. Mark Strauch; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| Bromochlorodifluoromethane (1211) has been shown to sensitize the myocardium to the arrhythmogenic effects of various adrenergic amines. The effects of certain physiologic and pharmacologic interventions were tested, including stretching of the tissue fiber, alpha adrenergic interations, cyclic adenosine monophosphate interactions and beta blockade of slow ion channel stimulation. Other studies indicate that 1211 has no apparent direct arrhythmogenic action on the dog heart, but acts only to sensitize the heart ... |
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| Electron Device Contact Studies |
MAY 1982 |
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| Authors:
Philip E. Wigen; Marlin O. Thurston; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
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| This report describes the initial half of a program of investigation and characterization of contacts made to GaAs. A theoretical model of contact behavior based on electron tunneling is adapted to GaAs and will be used to compare experimental results of Au contacts fabricated on Sn diffused, n-type, GaAs surface layers. The fabrication of n-type layers using spin-on dopant sources and a semi closed chamber, in an open tube diffusion ... |
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| Problems of Statistical Inference and Optimization with Applications |
08 FEB 1982 |
|
| Authors:
J. S. Rustagi; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| Research was initiated in the areas of regression models for grouped data and optimization techniques in statistics. The results obtained were communicated through interim technical reports and publications in journals. The list of such publications is given. |
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| Interdisciplinary Research Project on Sliding Wear |
31 JAN 1982 |
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| Authors:
D. A. Rigney; W. A. Glaeser; A. R. Rosenfield; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| This report summarizes basic research on the mechanisms of sliding friction and wear done jointly by groups at The Ohio State University and Battelle Columbus Laboratories. The OSU portion of this interdisciplinary work has been concerned with unlubricated sliding wear. At Battelle the work has included sliding tests with selected lubricants, in situ sliding in an SEM, and application of fracture mechanics to sliding wear. |
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| T-Matrix Formulation to Study the Frequency Dependent Properties of Absorbing Materials |
15 JAN 1982 |
|
| Authors:
Vijay K. Varadan; Vasundara V. Varadan; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| A scattering matrix theory is presented for studying the multiple scattering of both longitudinal and transverse elastic waves in a medium containing a random distribution of inclusions or voids of arbitrary shape. A statistical analysis with QCA and Percus-Yevick pair correlation function is then employed to obtain expressions for the average amplitudes of the coherent fields which may be solved to yield the bulk or effective properties of the inhomogeneous ... |
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| Scattering of Waves by Visoelastic Composites and the Characterization of their Dynamic Properties |
13 JAN 1982 |
|
| Authors:
V. V. Varadan; V. K. Varadan; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| The propagation of electromagnetic waves in an infinite medium composed of a random distribution of identical, finite scatterers is studied. The T-matrix of a single isolated scatterer, obtained by using the null field equation, is used to make the equations for the field incident on a particular scatterer and the field scattered by it, self consistent. The method we propose is well suited for computations at wavelengths comparable to obstacle ... |
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| Sheltering and Housing after Major Community Disasters: Case Studies and General Observations |
JAN 1982 |
|
| Authors:
Enrico Quarantelli; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| In an earlier report on evacuation, it was recommended that a special examination be made of the sheltering and housing aspects of disasters. Following that recommendation, The Disaster Research Center (DRC) reviewed the literature and undertook some analyses of previously unanalyzed data on that subject. In the report, we note that the literature is scanty and unsystematic, as well as marked by considerable conceptual confusion between sheltering and housing. Part ... |
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| Long Bone and Joint Response to Mechanical Loading |
NOV 1981 |
|
| Authors:
Ali Erkan Engin; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| The research program presented in this report is concerned with collection of active muscle force and moment response data of the human upper and lower extremities when the extremities are subjected to various external forces. The major components of the specially designed and built experimental apparatus are a subject restraint system, a force application device which employs three sonic emitters, and an upper arm (or upper leg) cuff with four ... |
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| Chemical Carcinogen-Induced Changes in tRNA Metabolism in Human Cells |
NOV 1981 |
|
| Authors:
Ronald W. Trewyn; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| Changes in nucleic acid catabolism were found in human cells transformed by an activated derivative of 1,2-dimethylhydrazine, with increased generation of 7-methylguanine being the major alteration. 7-Methylguanine was shown to inhibit the enzyme tRNA: guanine transglycosylase. This enzyme exchanges queuine (Q-base) for guanine in the first position of the anticodon of four different tRNA's, and tRNA's from transformed cells are Q-deficient. 7- Methylguanine was also found to induce Q-hypomodification of ... |
|
| Molecular Interactions of High Energy Fuels and Jet Fuels with Oncogenic Viruses and Endogenous Viruses |
OCT 1981 |
|
| Authors:
James R. Blakeslee Jr; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| The objectives of this research are to develop rapid in-vitro assays to evaluate the carcinogenic potential of chemicals used by the U.S. Air Force. Snyder-Theilen Feline Sarcoma Virus (ST FeSV), quantitatively transforms human skin fibroblasts following second order kinetics. These studies were performed in order to determine whether chemicals altered ST FeSV transformation in a predictable manner and to correlate the alteration with the carcinogenic or non- carcinogenic activity of ... |
|
| T-Matrix Analysis of Acoustic Wave Scattering from Thin Elastic Shells |
OCT 1981 |
|
| Authors:
V. V. Varadan; V. K. Varadan; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| Progress has been made in the study of acoustic wave scattering by elastic obstacles immersed in water using the T-matrix approach. It is understood, that in problems of interest to the Navy, scattered field data is required for long, thin bodies of revolution whose wall thickness is very small compared to the wavelength of the incident wave but whose overall dimensions are comparable and often larger than the wavelength of ... |
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| Optimization of Performance of Arc Welding Using Fluxes in Welded Ship Structures from HY-100 and HY-130 KPSI |
SEP 1981 |
|
| Authors:
Clarence E. Hackson; James T. Hickey; Michael D. Hayes; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| The ability to weld steels with yield strengths over 100 ksi with the submerged arc process has been limited by a lack of fluxes and filler metals specifically designed for this purpose. This research program used commercially available filler wires that have been designed for gas metal arc welding and formulated flux compositions to limit the oxygen pickup in the weld metal. The effect of flux basicity on weld metal ... |
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| Rotor Flow Research in Low Speed Helicopter Flight |
SEP 1981 |
|
| Authors:
Henry R. Velkoff; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| Measurements of helicopter rotor wake flow were made at low advance ratio. Both steady and non-steady data were taken in the wake using 3-D hot-film anemometry. Emphasis was placed on the presentation of the data. Motion pictures were obtained from the computer plots of the experimental velocity data. (Author) |
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| Terrain Model Animation |
SEP 1981 |
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| Authors:
John L. Booker; Charles Csuri; Robert Marshall; Roger Wilson; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| Procedure models are used to combine fundamental data elements in the creation of unified objects comprising the terrain model. A procedure model to generate trees of various species was implemented. Interactive techniques were developed to generate mountains. An analysis was made of the performance of a Z- buffer display algorithm. Test results are included in the report. (Author) |
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| Development of a Computer Based Presentation of Non-Steady Helicopter Rotor Flows |
SEP 1981 |
|
| Authors:
Henry R. Velkoff; Richard R. Navarro; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| A system to measure the non-steady velocities in the model rotor wake was modified to provide velocity data in a form more useful to the user of the data. Hot wire angle parameters were modified so as to provide better correlations by using cosine law in place of the usual K-squared technique common in hot-wire anemometry. The results of the non-steady measurements were presented in the form of motion pictures ... |
|
| Chemical and Molecular Biological Aspects of Alkylhydrazine-Induced Carcinogenesis in Human Cells in vitro |
SEP 1981 |
20 pages |
| Authors:
Donald T. Witiak; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| 14C-labeled 1,1-DMH and 1,2-DMH of high specific activity (> or = 100 mCi/m mol) have been prepared and utilized, along with 14C-labeled MMH, to study alkylation of DNA and proteins in low passage human neonatal foreskin derived fibroblasts. When human fibroblasts were treated under conditions which would be expected to lead to a negligible number of transformation events, i.e. cells labeled were in a non-growing environment and the dose of ... |
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| Immune Dysfunctions and Abrogation of the Inflammatory Response by Environmental Chemicals |
AUG 1981 |
|
| Authors:
Richard G. Olsen; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| During the past year, the immunotoxic effects of three chemicals were studied: hydrazine (hz), benzo-alpha-pyrene, and 1,1-dimethylhydrazine (UDMH). (1) Hydrazine: mice treated with 5-20 mg/kg Hz showed a suppressed antibody- forming cell response after immunization compared to control mice. This immunosuppression correlated with the Hz-induced in vitro suppression of the lymphocyte blast transformation (LBT) response noted previously. (2) Benzo- alpha-pyrene: when added to LBT assays, caused a concentration related suppression ... |
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| Discrete Control Modelling of Small Teams |
JUN 1981 |
|
| Authors:
Richard A. Miller; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| Three basic research directions were pursued. The first was the construction of computer aids which enable an analyst to interactively structure and specify a discrete control model. The resulting model can be used to automatically analyze a data base containing event oriented operator performance data. The second task involved providing theoretical and analytical support for the construction of a multi-level, discrete control based model of planning related activity in a ... |
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| Coordinative and Strategic Aspects of Tracking Discontinuous Inputs |
MAY 1981 |
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| Authors:
Richard J. Jagacinski; Richard A. Miller; Walter W. Johnson; Rajendra B. Nalavade; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| Two basic research projects were pursued. One project developed a finite-state model of how an individual tracker coordinates additively coupled position and velocity control sticks to capture a moving target. The model is multi-level. The top level consists of a discrete, probabilistic activity sequence generator closely related to the tracker's plan or general strategy for target capture. Lower levels of detail are more deterministic and indicate how the activities are ... |
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| Influence of Roost Site Selection on the Energetic Efficiency and Distribution of Starlings and Blackbirds: A Way of Controlling Blackbird Populations Near Airports |
MAY 1981 |
|
| Authors:
Sheldon Lustick; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| In an effort to ascertain the energetic savings realized by blackbirds utilizing various roost sites and to compare the thermoregulatory benefits afforded by different types of roosts, this study utilized data on the metabolic rates of blackbirds and starlings with forced convection. Measurements of the percent cover and the wind velocity in several roost types were used to compare and contrast the energetic requirements of blackbirds and starlings utilizing these ... |
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| Design and Analysis of Chronic Aquatic Tests of Toxicity |
MAY 1981 |
|
| Authors:
Paul I. Feder; William J. Collins; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| The present investigation considers aspects of the planning of, reporting results from, and the statistical analysis of data arising from chronic aquatic tests of toxicity with fathead minnows. The discussion emphasizes analyses and data displays for the interpretation of qualitative mortality and abnormality data and quantitative weight data. The report consists of nineteen sections. Section I-IV describe the literature search, argue for and present a set of standardized data reporting ... |
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| Soil-Landscape Relations at Selected Sites Along Environmental Gradients in Northern Alaska. |
MAY 1981 |
|
| Authors:
Kaye R. Everett; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| This report was prepared from data gathered between 1976 and 1980. The objectives are: (1) To trace the development of soils, especially those of the wet tundra, and their relationship to associated microtopography; (2) To determine to what extent the wet tundra soils and their related microtopography are the products of a cyclic repetition of events involving vegetation succession and hydrologic changes (tussock tundra) or, in the case of the ... |
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| A Study of Alternative Computer Architectures for System Reliability and Software Simplification. |
22 APR 1981 |
|
| Authors:
Kenneth J. Breeding; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| The principle thrust of this work has been the development of special purpose computer architectures aimed at two problem areas. The first area deals with the use of hardware structures to simplify software development and utilization. The second area deals with processing systems for efficiently handling distributed tasks. (Author) |
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| Assessment of Scene Complexity and Cue Validity in Visual Flight Simulation |
01 MAR 1981 |
|
| Authors:
Harvey G. Shulman; Paul D. Isaac; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| The human visual system is theorized to behave as a set of spatial frequency filters. The project developed the means to measure and manipulate the spatial frequency content of computer generated images representative of those to be used in future flight simulators. Experimental measurement of perceived clarity and complexity showed that spatial frequency content influences the process of image segregation and formation. The results encourage the use of spatial frequency ... |
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| Predicting the Transverse Conductivity of Unidirectional and Bidirectional Filamentary Composites |
MAR 1981 |
|
| Authors:
Richard H. Zimmerman; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| This Phase II report of the grant AFOSR 78-3640 presents studies of analytical models capable of predicting the transverse conductivity of unidirectional and bidirectional filamentary composites to an accuracy of several per cent. The models are based on adaptations of the Rayleigh solution and one-dimensional conduction analysis. Values of the conductivity defined by Han and Cosner (by numerical methods) and presented in the Phase I report of this grant study ... |
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| Characterization of the Chemical Constitution and Profile of Pharmacological Activity of PGBx. |
23 FEB 1981 |
|
| Authors:
A. M. Burkman; R. W. Doskotch; D. D. Miller; OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS
|
| Contents: Studies on the Pharmacology of PGB sub x; Studies on the Synthesis of PGB sub x; and Studies of the Separation of the PGB sub x Complex. |
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Reports by Corporate Author
