Rocketdyne LOX bearing tester program

The cause, or causes, for the Space Shuttle Main Engine ball wear were unknown, however, several mechanisms were suspected. Two testers were designed and built for operation in liquid oxygen to empirically gain insight into the problems and iterate solutions in a timely and cost efficient manner independent of engine testing. Schedules and test plans were developed that defined a test matrix consisting of parametric variations of loading, cooling or vapor margin, cage lubrication, material, and geometry studies. Initial test results indicated that the low pressure pump thrust bearing surface distress is a function of high axial load. Initial high pressure turbopump bearing tests produced the wear phenomenon observed in the turbopump and identified an inadequate vapor margin problem and a coolant flowrate sensitivity issue. These tests provided calibration data of analytical model predictions to give high confidence in the positive impact of future turbopump design modification for flight. Various modifications will be evaluated in these testers, since similar turbopump conditions can be produced and the benefit of the modification will be quantified in measured wear life comparisons

Rotor response for transient unbalance changes in a nonlinear simulation

Transient unbalance shifts were determined not to excite a rotor instability in the high pressure turbomachinery of the Space Shuttle Main Engine using the current rotor dynamic models. Sudden unbalance changes of relatively small magnitudes during fast-speed ramps showed stable nonsynchronous motion depending on the resultant unbalance distribution at subsequent high speed dwells. Transient moment unbalance may initiate a limit cycle subsynchronous response that shortly decays, but a persistent subsynchronous with large amplitudes was never achieved. These limit cycle subsynchronous amplitudes appear to be minimized with lower unbalance magnitudes, which indicates improved rotor balancing would sustain synchronous motion only. The transient unbalance phenomenon was determined to be an explanation for synchronous response shifts often observed during engine tests

Battered Women\u27s Compliance-Gaining Strategies as a Function of Argumentativeness and Verbal Aggression

This study investigated (1) the type of compliance-gaining strategies that battered women reported using in domestic conflicts and (2) whether these strategies related to the battered women\u27s verbal aggression and argumentativeness. Participants in this study were 115 abused women who were seeking refuge from abusive spouses in temporary shelters for battered women. The results suggest that battered women most frequently reported using indirect strategies. Aversive Stimulation (i.e., pouting sulking, crying) and ingratiation (i.e., manipulation in the form of affection or favor-doing) were the top two strategies reported. Furthermore, a canonical correlation analysis resulted in an overall significant relationship between compliance-gaining strategies and argumentativeness and verbal aggressiveness

Wind-tunnel study of chimney downwash at the B.L. England Station of the Atlantic City Electric Company: report

CER83-84JEC-JAP30.CER83-84JEC-JAP-JAB30a.CER83-84JEC-JAP30b.Includes bibliographical references.June 1984.CSU Project 2-95800.Prepared for Stearns-Roger Engineering Corporation.The Atlantic City Electric Company has measured SO2 concentrations, downwind from one of their electrical power generating stations, which occasionally exceed regulatory limitations. The problem (suspected to be plume downwash induced by adjacent buildings) was referred to the Stearns-Roger Engineering Corporation for further study. The study included wind-tunnel simulation, which was subcontracted to Colorado State University. Diffusion tests were subsequently conducted on a 1:300 scale model of the B. L. England Station (a coal and oil fired electrical power generation facility) in the CSU Meteorological Wind Tunnel. Their purpose was to confirm the downwash and to determine the effect of various changes in stack/site configuration upon plume behavior. The model tests, conducted at pre-selected wind directions and velocities, included physical alterations in the station site, increases in momentum and buoyancy of the flue gases, increases in height of the existing stacks, and inspection of two new stacks - GEP and greater. Data obtained included ground-level concentration measurements for all tests and visualization of selected configurations. The model tracer gas concentrations were converted to equivalent prototype SO2 concentrations for comparison with any similar field data. The visualization studies were documented on 35 mm slides, B&W photos, and video cassette. Evaluation of test results indicates that significant downwash is caused by the boiler buildings. The data further reveal that those configurations which increased the plume height above the building influence are practicable measures to mitigate the downwash phenomenon. Extension of the existing stacks when accompanied by flue gas reheat provide SO2 reductions nearly equal to a GEP stack

A Twins Study of Communicative Adaptability: Heritability of Individual Differences

Recently, a model of communication theory and research has appeared in the literature within which stable individual differences in communication behavior represent individual differences in activation thresholds of neurobiological systems. The neurobiological systems thought to underly communication traits and behavior are assumed to be primarily due to genetic inheritance. As such, the model assigns a limited role to adaptability in social situations, instead positing communication adaptability as an inherited trait. In the present study, heritability estimates for the dimensions of communicative adaptability were derived from correlations based on identical and fraternal twins\u27 responses to a multidimensional communicative adaptability measure. Results indicated that social composure was 88% heritable, wit was 90% heritable, social confirmation was 37% heritable, articulation ability, and appropriate disclosure were 0% heritable. Theoretical implications are discussed

Fathers\u27 Trait Verbal Aggressiveness and Argumentativeness as Predictors of Adult Sons\u27 Perceptions of Fathers\u27 Sarcasm, Criticism, and Verbal Aggressiveness

This research used Infante\u27s (1987) conceptualization of trait verbal aggressiveness and argumentativeness to analyze adult males’ perceptions of their fathers’ messages. In the present study, fathers’ self‐reports of verbal aggressiveness and argumentativeness were used to predict their adult sons’ reports of fathers’ sarcasm, criticism, and global verbal aggressiveness. Results of multivariate regression analyses indicated that (1) fathers’ argumentativeness accounted for a significant percentage of variance in the dependent variable set but did not contribute significantly to the univariate equations and (2) fathers’ verbal aggressiveness explained a significant percentage of the multivariance and contributed significantly to each univariate equation. Overall, the predictor set explained 39.32% of the variance in the dependent variable set. As predicted, the preponderance of the effect (30.05%) was due to fathers’ verbal aggressiveness. Implications are discussed

Trait Verbal Aggressiveness and the Appropriateness and Effectiveness of Fathers\u27 Interaction Plans Ii: Fathers\u27 Self-Assessments

Examines the relationship between fathers\u27 verbal aggressiveness and their perceptions of the appropriateness and effectiveness of selected methods for interacting with children, mainly sons. Examination of literature on the issue; Details on hypotheses which have been developed

Fathers\u27 Trait Verbal Aggressiveness and Argumentativeness as Predictors of Adult Sons\u27 Perceptions of Fathers\u27 Sarcasm, Criticism, and Verbal Aggressiveness

This research used Infante\u27s (1987) conceptualization of trait verbal aggressiveness and argumentativeness to analyze adult males’ perceptions of their fathers’ messages. In the present study, fathers’ self‐reports of verbal aggressiveness and argumentativeness were used to predict their adult sons’ reports of fathers’ sarcasm, criticism, and global verbal aggressiveness. Results of multivariate regression analyses indicated that (1) fathers’ argumentativeness accounted for a significant percentage of variance in the dependent variable set but did not contribute significantly to the univariate equations and (2) fathers’ verbal aggressiveness explained a significant percentage of the multivariance and contributed significantly to each univariate equation. Overall, the predictor set explained 39.32% of the variance in the dependent variable set. As predicted, the preponderance of the effect (30.05%) was due to fathers’ verbal aggressiveness. Implications are discussed