Solid rocket booster thrust vector control V-2 off-nominal testing

The results of the V-2 off nominal test sequence performed on the space shuttle solid rocket booster thrust vector control (SRB TVC) system are reported. The TVC subsystem was subjected to 19 off nominal test conditions. The test sequence consisted of: 8 burp starts, 30 hot firings, 14 GN2 spin tests, and 3 servicing passive system tests. It is concluded that the TVC subsystem operated nominally in response to the given commands and test conditions. Test objectives, detail results, and data are included

Leadership Frames of College Presidents, Their Executive Cabinets, and Teams in Public and Not-for-Profit Master\u27s Institutions in West Virginia, Kentucky, Maryland, Ohio, Pennsylvania, North and South Carolina, and Florida

This study investigated leadership frames of college presidents and members of their executive cabinets (vice presidents for academic affairs, vice presidents for student affairs, and chief financial officers) to determine their predominant leadership frame(s). It also determined if the leadership frames of the presidents\u27 group and the cabinet members\u27 group diverged or converged. Public and not-for-profit master\u27s degree granting institutions, large, medium, and small, in the states of West Virginia, Kentucky, Maryland, Ohio, Pennsylvania, North and South Carolina, and Florida participated in this study. Of the 384 senior administrators that were invited to participate, 147 completed Bolman & Deal\u27s Leadership Orientation (Self) (1990) questionnaire. The survey instrument consisted of 32 items measuring the four leadership frames espoused by Bolman & Deal. The instrument was formatted electronically using SurveyMonkey and sent via electronic mail to each participant. Frequencies and descriptive statistics were used in analyzing the mean scores of leadership frames of the individual participants and as groups. Analyses of variance (ANOVA) were used between groups to determine if significant differences existed in each of the leadership frames. Tables graphically displayed the results in answering each research question. Demographic information was collected and analyzed to determine gender, administrative roles, and years in administrative role. The findings indicated that presidents often operated as multi-framed leaders with no significant differences regarding years in role and leadership frames. Additionally presidents had mean scores above 4 out of a possible 5 in the political, symbolic, and structural frames. Cabinet members saw similar results. All operated as multi-frame leaders at times, but tended to operate in the human resource, political, and structural frames with their mean scores supporting the results. In comparing leadership frames between groups, two significant differences were found. Presidents significantly more often used the political (rho = .013) and symbolic (rho= .003) frames than did their cabinet members

Solid rocket booster thrust vector control subsystem test report (D-1)

The results of the sequence of tests performed on the space shuttle solid rocket booster thrust vector control subsystem are presented. The operational characteristics of the thrust vector control subsystem components, as determined from the tests, are discussed. Special analyses of fuel consumption, basic steady state characteristics, GN2 spin, and actuator displacement were reviewed which will aid in understanding the performance of the auxiliary power unit. The possibility of components malfunction is also discussed

Solid rocket booster thrust vector control subsystem verification test (V-2) report

The results of the verification testing sequence V-2 performed on the space shuttle solid rocket booster thrust vector control subsystem are presented. A detailed history of the hot firings plus additional discussion of the auxiliary power unit and the hydraulic component performance is presented. The test objectives, data, and conclusions are included

Spectral analysis and new visible and ultraviolet lines of Ar V

A capillary discharge tube was used to record the Ar spectrum in the region of 330-4400 angstrom. We analyzed a set of 109 lines of Ar V, with 10 of them being classified for the first time. Part of these newly identified lines (six in total) corresponds to electric dipole transitions in the visible and ultraviolet regions of the spectrum. We calculated weighted transition rates (gA) for all experimentally observed lines and the corresponding lifetimes using a relativistic Hartree-Fock method with configuration interaction. The equations were modified to consider core polarization (CP) effects. A study on the Si isoelectronic sequence found that considering CP effects is essential for the correct description of the Ar V structure2422COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESConsejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), ArgentinaConsejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); Coordenaccao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES), Brazil; Comision de Investigaciones Cientificas de la Provincia de Buenos Aires (CIC

New spectroscopic data for atomic tungsten XIV

The thirteen times ionized tungsten is isoelectronic with PmI. Wavelengths and transition probabilities for the 5s-5p and 5p-5d transitions of WXIV, identifying the ground state as 4f13 5s2 2F7/2 were calculated. Both, a relativistic Hartree Fock approach, including core-polarization effects, and a purely relativistic multiconfiguration Dirac-Fock method were used for the calculations. Particularly, 5s-5p transitions were compared with experimental results obtained with VUV electron beam ion trap (EBIT) spectroscopy583CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESnão temnão tem17th International conference on the physics of highly charged ionsThis research was supported by the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina, by the Coordenaçăo de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) and by the Conselho Nacional de Pesquisa (CNPq), Brazil. The Comisión de Investigaciones Científcas de la Provincia de Buenos Aires (CIC), where J. G. Reyna Almandos and M. Raineri are researchers, is also gratefully acknowledge

Revised and extended analysis of five times ionized xenon, Xe Vi

A capillary discharge tube was used to record the Xe spectrum in the 400-5500 Å region. A set of 243 lines of the Xe VI spectrum was observed, and 146 of them were classified for the first time. For all known lines, we calculated the weighted oscillator strengths (gf) and weighted transition probabilities (gA) using the configuration interaction in a relativistic Hartree-Fock approach. The energy matrix was calculated using energy parameters adjusted to fit the experimental energy levels. Core polarization effects were taken into account in our calculations. Experimental energy values and calculated lifetimes are also presented for a set of 88 levels. From these levels, 32 were classified for the first time and 33 had their values revised. Our analysis of the 5s5p5d and 5s5p6s configurations was extended in order to clarify discrepancies among previous works216

Focusing of timelike worldsheets in a theory of strings

An analysis of the generalised Raychaudhuri equations for string world sheets is shown to lead to the notion of focusing of timelike worldsheets in the classical Nambu-Goto theory of strings. The conditions under which such effects can occur are obtained . Explicit solutions as well as the Cauchy initial value problem are discussed. The results closely resemble their counterparts in the theory of point particles which were obtained in the context of the analysis of spacetime singularities in General Relativity many years ago.Comment: 14 pages, RevTex, no figures, extended, to appear in Phys Rev

Biopreservation of chocolate mousse with Lactobacillus helveticus 2/20: Microbial Challenge Test

Probiotic bacteria are used for food biopreservation because their metabolic products might contribute to ensuring food microbiological safety and/or increase its shelf life without the addition of chemical preservatives. Moreover, biopreserved foods are excellent vehicles for the delivery of probiotic bacteria. The aim of the study was to investigate the potential of chocolate mousse food matrix for the delivery of the probiotic strain Lactobacillus helveticus 2/20 (Lb. helveticus 2/20) and to investigate its capacity to inhibit the growth of two foodborne pathogenic bacteria (Staphylococcus aureus and Escherichia coli). Therefore, the populations of free or encapsulated in calcium alginate Lb. helveticus 2/20 cells and/or of each pathogen (used to voluntarily contaminate each sample) were monitored both in complex nutrient medium (MRS broth) and in chocolate mousse under refrigeration conditions and at room temperature. Lb. helveticus 2/20 alone in free or encapsulated state effectively inhibited the growth of Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 25923 in chocolate mousse when stored at 20 ± 2 °C. Practically no viable unwanted bacteria were identified on the 7th day from the beginning of the process. High viable Lb. helveticus 2/20 cell populations were maintained during storage under refrigerated conditions (4 ± 2 °C) and at room temperature. Chocolate mousse is thus a promising food matrix to deliver probiotic Lb. helveticus 2/20 cells, which could also protect it from contamination by unwanted bacteria

Revised and Extended Analysis of Five Times Ionized Argon (Ar VI)

The spectrum of five times ionized argon, (Ar VI), has been observed in the 280-2100 Å wavelength range. Eighty-seven lines have been identified as transitions between levels of the 3s23p, 3s3p2, 3s23d, 3p3, 3s3p3d, 3s24s, 3s24d and 3s3p4s configurations. For 33 of the lines the classification is new. Forty-one energy level values belonging to these configurations were analyzed and we propose 9 new energy level values for levels corresponding to odd parity configurations. The configurations are interpreted by fitting the theoretical energy expressions to the observed energy levels using least- squares techniques. The parameter values are compared with results from Hartree-Fock calculations.Facultad de Ciencias Exacta