Solid propellant rocket motor

The characteristics of a solid propellant rocket engine with a controlled rate of thrust buildup to a desired thrust level are discussed. The engine uses a regressive burning controlled flow solid propellant igniter and a progressive burning main solid propellant charge. The igniter is capable of operating in a vacuum and sustains the burning of the propellant below its normal combustion limit until the burning propellant surface and combustion chamber pressure have increased sufficiently to provide a stable chamber pressure

Solid rocket technology advancements for space tug and IUS applications

In order for the shuttle tug or interim upper stage (IUS) to capture all the missions in the current mission model for the tug and the IUS, an auxiliary or kick stage, using a solid propellant rocket motor, is required. Two solid propellant rocket motor technology concepts are described. One concept, called the 'advanced propulsion module' motor, is an 1800-kg, high-mass-fraction motor, which is single-burn and contains Class 2 propellent. The other concept, called the high energy upper stage restartable solid, is a two-burn (stop-restartable on command) motor which at present contains 1400 kg of Class 7 propellant. The details and status of the motor design and component and motor test results to date are presented, along with the schedule for future work

Judicial Selection in Tennessee: Deciding “the Decider”

This article includes an overview of judicial selection in Tennessee, as well as providing the author\u27s personal perspectives on the subject. The quality of judges and the manner of selecting them matters; this is a basic premise underpinning the rule of law in the United States. From the inception of the United States’ democratic system, the judiciary’s Damoclean Sword has been the threat of subrogation at the hands of the Legislature, and perhaps the easiest way to rattle the sword has been to legislatively interfere with judicial selection — whether by changing the manner of appointment or by simply refusing to fill vacancies. The comments above span the eighteenth, nineteenth, and twentieth centuries, and today in Tennessee the proverbial horse’s hair has never seemed more precarious

caos[ex]música. Estudio de conceptos relacionados con el caos, para la composición en música

En este trabajo final se han abordado diversas fuentes que se relacionan con el concepto de Caos. Es desde este enfoque que se ha pretendido interactuar con los procesos de la composición musical. La investigación ha sido abarcativa y el criterio para la apropiación de los contenidos es la lectura cruzada entre las mismas. El tema, de este modo, ha resultado una herramienta de pensamiento para la composición: se han tomado imágenes para influir en el nivel poético, ideas para generar técnicas y pensar problemas estéticos, y conceptos que nos han posicionado de una manera concreta en el quehacer compositivo. El problema que se nos ha planteado reside en la propia composición. La necesidad de contar con instrumentos para nutrir un ideario y un modo de operar en los discursos sonoros nos ha llevado a pensar desde el caos y desde una serie de conceptos aledaños. Muchos autores y perspectivas han ayudado a definir con mayor precisión nuestra línea de estudio, que en todos los casos se manifiesta como un hacer teórico-práctico. El diseño de engranajes de composición y de herramientas para pensar el grado de predecibilidad de un discurso; el pensamiento de fenómenos estéticos relacionados con dichas herramientas; la construcción de estructuras para sistemas con diferentes organizaciones, y la filosofía del propio quehacer artístico son algunos de los temas que se han desarrollado en este escrito. Como hemos dicho, esto se ha realizado ponderando la diversidad de autores y disciplinas, e intentando dialogar entre las fuentes implicadas.Fil: Behm, Pablo L.. Universidad Nacional de Córdoba. Facultad de Artes. Departamento Académico de Música; Argentina

Edward Byrne Memorial Justice Assistance Grant (JAG) Program: Evaluation Report

The Consortium for Crime and Justice Research (CCJR) at the University of Nebraska – Omaha is conducting an evaluation of projects supported by Nebraska’s 2012 Edward Byrne Memorial Justice Assistance Grant (Byrne JAG) Program funds. The primary goal of the evaluation is to provide the Nebraska Commission on Law Enforcement and Criminal Justice (Crime Commission) a summary of the law enforcement, training, prevention, and associated activities occurring as a direct or indirect result of the infusion of Bryne JAG funds. In other words, the intent of the evaluation is to provide a summary of the funded activities and resulting products from Byrne JAG dollars. A subsidiary goal is to track the use of evidence-based practices (EBPs) supported by JAG funds. Because federal funding agencies continue to emphasize the use of practices that are supported by research evidence, we are tracking the use of EBPs, as well as fidelity to the model of the practices that have been adopted. This report provides an overview of activities and products of funded agencies based on required performance indicator data submitted for October to December 2012 and January to March 2013. Because the funded task forces report similar data, their feedback is included in one section. In addition to the task forces, information is provided to summarize the activities of Banister’s Leadership Academy, the Nebraska Crime Commission, The Indian Center, the Law Enforcement Training Center, the Nebraska Department of Corrections, the Douglas County Attorney’s Office, and the Nebraska Attorney General’s Office

Knee joint neuromuscular activation performance during muscle damage and superimposed fatigue

This study examined the concurrent effects of exercise-induced muscle damage and superimposed acute fatigue on the neuromuscular activation performance of the knee flexors of nine males (age: 26.7 ± 6.1yrs; height 1.81 ± 0.05m; body mass 81.2 ± 11.7kg [mean ± SD]). Measures were obtained during three experimental conditions: (i) FAT-EEVID, involving acute fatiguing exercise performed on each assessment occasion plus a single episode of eccentric exercise performed on the first occasion and after the fatigue trial; (ii) FAT, involving the fatiguing exercise only and; (iii) CON consisting of no exercise. Assessments were performed prior to (pre) and at lh, 24h, 48h, 72h, and 168h relative to the eccentric exercise. Repeated-measures ANOVAs showed that muscle damage within the FAT-EEVID condition elicited reductions of up to 38%, 24%) and 65%> in volitional peak force, electromechanical delay and rate of force development compared to baseline and controls, respectively (F[io, 80] = 2.3 to 4.6; p to 30.7%>) following acute fatigue (Fp; i6] = 4.3 to 9.1; p ; Fp, iq = 3.9; p <0.05). The safeguarding of evoked muscle activation capability despite compromised volitional performance might reveal aspects of capabilities for emergency and protective responses during episodes of fatigue and antecedent muscle damaging exercise

Oral and intravenous bretylium disposition

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/109931/1/cptclpt1980190.pd

Heterodera glycines Infection Increases Incidence and Severity of Brown Stem Rot in Both Resistant and Susceptible Soybean

Growth chamber experiments were conducted to investigate whether parasitism by Heterodera glycines, the soybean cyst nematode, increases incidence and severity of brown stem rot (BSR) of soybean, caused by Phialophora gregata, in both resistant and susceptible soybean cultivars. Soybean genotypes with various combinations of resistance and susceptibility to both pathogens were inoculated with P. gregata alone or P. gregataplus H. glycines. In most tests of H. glycines-susceptible genotypes, incidence and severity of internal stem discoloration, characteristic of BSR, was greater in the presence than in the absence of H. glycines, regardless of susceptibility or resistance to BSR. There was less of an increasing effect of H. glycines on stem symptoms in genotypes resistant to both BSR and H. glycines; however, P. gregata colonization of these genotypes was increased. Stems of both a BSR-resistant and a BSR-susceptible genotype were colonized earlier by P. gregata in the presence than in the absence of H. glycines. Our findings indicate that H. glycines can increase the incidence and severity of BSR in soybean regardless of resistance or susceptibility to either pathogen