4,509 research outputs found
Dynamic Characteristics and Stability Analysis of Space Shuttle Main Engine Oxygen Pump
The dynamic characteristics of the Space Shuttle high pressure oxygen pump are presented. Experimental data is presented to show the vibration spectrum and response under actual engine operation and also in spin pit testing for balancing. The oxygen pump appears to be operating near a second critical speed and is sensitive to self excited aerodynamic cross coupling forces in the turbine and pump. An analysis is presented to show the improvement in pump stability by the application of turbulent flow seals, preburner seals, and pump shaft cross sectional modifications
A TWO-STAGE MODEL OF THE DEMAND FOR SPECIALTY CROP INSURANCE
Legislators are considering raising catastrophic (CAT 50% coverage) crop insurance premiums. However, estimates of a two-stage coverage-choice and participation model using county-level data from California grape growers show that the demand for CAT insurance is price-elastic, therefore, premium increases will worsen the financial performance of the grape-insurance program.crop insurance, discrete / continuous choice, grapes, multinomial logit, Research Methods/ Statistical Methods, Risk and Uncertainty,
Stories as personal coaching philosophy
The importance of coaches developing and articulating a personal coaching philosophy which encapsulates their values and beliefs is widely recognised. Yet it is also acknowledged that many coaches resist what appears an abstract task or find it to be of limited use in their day-to-day practice. In this paper we explore the potential of an alternative approach to developing and articulating a personal coaching philosophy: storytelling. Following a discussion of the potential of stories, we present a story written by one coach which expresses her personal philosophy in a way that is firmly rooted in her coaching practice. Storytelling approaches, we suggest, can reveal the connections between abstract/general philosophy and the personal embodied experience of coaching. We reflect on the possibilities and problems of using stories as philosophy and offer some suggestions for how coaches may be supported in developing their coaching philosophy through storytelling
A computer program for a line-by-line calculation of spectra from diatomic molecules and atoms assuming a Voight line profile
Computer program predicts the spectra resulting from electronic transitions of diatomic molecules and atoms in local thermodynamic equilibrium. The program produces a spectrum by accounting for the contribution of each rotational and atomic line considered
Method of identifying clusters representing statistical dependencies in multivariate data
Approach is first to cluster and then to compute spatial boundaries for resulting clusters. Next step is to compute, from set of Monte Carlo samples obtained from scrambled data, estimates of probabilities of obtaining at least as many points within boundaries as were actually observed in original data
Getting it right for everyone : Sport coaching and the adult participation domain
Sport provision is best understood as a series of distinctive domains, with characteristic purposes, motivations, practices and demands on coachesâ expertise. This paper identifies the characteristics of the instructor-led adult participation coaching domain, which is the least well researched and developed, and identifies the implications for coach education and workforce management. The propositions are illustrated by conversations with Coaching Development Managers from 8 sports in the UK that have a significant adult participation profile. The paper confirms the variety of domain populations, from casual recreation to coach-dependent adult competition, including âMastersâ-designated participation, but outside the mainstream of performance sport. It highlights two principal coaching practices: market-led sport instructors, delivering episodic, largely technique-based âlessonsâ to participants, and (club) coaches of adult competition sport. However, much of the characteristic adult participation is casual recreation and coach-independent. The paper argues that a fuller understanding of this domain is important for ensuring that coachesâ expertise and practice are matched to participant needs
The Effects of the Computer on the Tax Consultant in the State of Utah
The purpose of this paper was to determine the effects of computerized tax services on tax practitioners in the State of Utah. Initial data was obtained from a questionnaire which was mailed to members of the Utah Association of Certified Public Accountants who were engaged in public practice, and also from personal interviews with various other practitioners. The comparisons of firms which offer services to accountants resulted from a review of current literature and also through direct correspondence
Consumers Ask: Should I Purchase Long-Term Care Insurance?
Seventy million baby-boomers may face the need for long-term care (LTC). Therefore, educating them about long-term care insurance (LTCI) is necessary considering the high costs of LTC services and the aggressive marketing of LTCI by companies. It is important that consumers receive unbiased information regarding LTCI and how it fits into their personal financial situation. Seminars using the Should I Purchase Long-Term Care Insurance? presentation and accompanying Comparing Long-Term Care Insurance worksheet have helped Idahoans: (1) become more knowledgeable about LTCI, (2) decide if LTCI is right for them, and (3) learn how to effectively shop for and compare LTCI
Quantification of Conformational Heterogeneity and its Role in Protein Aggregation and Unfolding
Proteins can exhibit significant conformational heterogeneity either under denaturing conditions or in aqueous solutions. The latter is true for a class of proteins whose sequences predispose them to form heterogeneous ensembles of conformations. Characterization of conformational heterogeneity in a protein ensemble requires the quantification of the amplitudes of spontaneous fluctuations in conjunction with information regarding coarse grain measures that report on the average sizes, shapes, and densities. This often demands multiplexed experimental approaches whose readouts are interpreted or annotated using ensembles drawn from atomistic or coarse grain computational simulations. Efforts to characterize conformational heterogeneity contribute directly to our understanding of disorder-to-order transitions in protein folding and self-assembly. These efforts are also crucial to our understanding of the heterotypic interactions involving intrinsically disordered proteins and non-native states of well-folded proteins. These heterotypic interactions are important in signal transduction and the regulation of protein homeostasis. The onset and progression of several systemic and neurodegenerative conformational diseases are linked to the nature and degree of conformational heterogeneity in specific proteins or proteolytic products of proteins.
This thesis work focuses on the quantitative characterization of conformational heterogeneity in simulated ensembles of inducibly unfolded and intrinsically disordered proteins. Advances in nuclear magnetic resonance spectroscopy afford the possibility of detailed measurements of inter-residue distances and modulations to the relaxation dynamics of paramagnetic spins that are inserted as probes into a protein. These state-of-the-art measurements show interesting features within denatured state ensembles that cannot be explained using canonical random coil models. Here, we use computer simulations to generate plausible facsimiles of denatured state ensembles that reproduce experimental data and demonstrate that the ensembles that are consistent with the data are characterized by the presence of low-likelihood, long-range intra-chain contacts between hydrophobic groups. When placed in the context of sequence conservation information, it appears that these contacts act as gatekeepers that protect proteins from the deleterious consequences of protein aggregation by sequestering hydrophobic groups in an assortment of intra-chain long-range contacts. We also characterize the nature and degree of conformational heterogeneity in glutamine- and asparagine-rich containing systems. These efforts lead to insights regarding the role of conformational heterogeneity in mediating intermolecular associations that are implicated in aggregation and self-assembly of these systems. Analysis of results from atomistic simulations leads to a phenomenological model for the modulation of conformational heterogeneity and degeneracies of intermolecular interactions by naturally occurring sequences that flank polyglutamine domains.
Finally, we develop a formal order parameter to quantify the conformational heterogeneity in simulated ensembles of proteins. When combined with measures of density and fluctuations thereof, it can be used to provide a complete description of the degree and nature of conformational heterogeneity in different ensembles, thus affording the ability to compare different ensembles to each other while also providing a way to categorize conformational transitions
Ogden\u27s Notorious Two-Bit Street, 1870-1954
A history which records the weaknesses and failures of society may serve as its conscience. The history of Twenty-fifth Street in Ogden, Utah is that kind of history. It reminds us that it is possible for evil influences to prey upon society to the extent that it weakens and becomes vulnerable to the influence.
First the people became passive. They began to feel that the influence was there and there was little they could do about it. They then began ignoring it as if by doing so it would cease to exist. But it didn\u27t disappear. Instead it grew and became so strong that eventually they were bound by its power. This is the story of Ogden\u27s notorious Two-Bit Street. Serving as the gateway into Ogden City for those who stepped off the train, it began to cater to the appetites and desires of the people who traveled through Utah.
It all began in 1869 when the railroads were joined at Promontory. Gestations of prostitution, gambling, and narcotics (opium) were the direct results of the absorption of Corinne and many other railroad towns along the way by Ogden.
Realizing this, the people of Ogden struggled at first to prevent the ominous spectre haunting the city; but they soon became passive, and it wasn\u27t long until the officials of the city were faced with the choice of either cleaning up the street or allowing it to remain. These authorities learned that by befriending those underworld leaders they could enjoy political strength enough to maintain themselves in power.
Finally, after eighty years of underworld prosperity, heroes who were courageous enough to challenge this power structure began to take steps to eradicate this influence. Uncertain of how it would work out and fearful of being politically and professionally destroyed, they nevertheless fervently attacked. Some were put down immediately; some made attacks, retreating when the pressure became great, later to return and renew the battle again. At first these were not the top leaders of the community, they were the men and women of the sheriff\u27s and police departments. Finally, in the early 1950\u27s these two departments began to harmonize their efforts; and with a change in leadership in city government, the crushing blow was made to Ogden\u27s notorious Two-Bit Street.
What remains of the Street today is a partial skeleton of the past
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