Estimate of nuclear technology engine test stand sound power and spectrum

Estimate of nuclear technology engine test stand sound power and spectru

Orbital debris research at NASA Johnson Space Center, 1986-1988

Research on orbital debris has intensified in recent years as the number of debris objects in orbit has grown. The population of small debris has now reached the level that orbital debris has become an important design factor for the Space Station. The most active center of research in this field has been the NASA Lyndon B. Johnson Space Center. Work is being done on the measurement of orbital debris, development of models of the debris population, and development of improved shielding against hypervelocity impacts. Significant advances have been made in these areas. The purpose of this document is to summarize these results and provide references for further study

Method of statistical filtering

Minimal formula for bounding the cross correlation between a random forcing function and the state error when this correlation is unknown is used in optimal linear filter theory applications. Use of the bound results in overestimation of the estimation-error covariance

Proposed Changes to Social Security: An Analysis

Some 48 million Americans are expected to collect around $518 billion in Social Security benefits during 2005.  Of these, about 70 percent are retired workers.  The ratio of workers covered by Social Security to retirees is approximately three to one but will decrease to about two to one in the next generation.  Furthermore, at present, there are significantly more Social Security taxes collected than benefits paid; the excess is spent to help fund other government programs.  With the Baby Boomers starting to collect benefits in 2008 and large federal deficits already threatening to push interest rates higher, providing for future Social Security funding is being addressed.  This paper explores existing and future demands expected to be placed on Social Security and possible changes that may be implemented to ensure its long-term viability

Adverse Changes In Faculty Behavior Resulting From Use Of Student Evaluations Of Teaching: A Case Study

Based on a detailed literature review and longitudinal analysis, this paper explores the possible underlying causes of the decline in the number of hours per week graduating business seniors indicated they studied during their senior year. The study was conducted at an AACSB accredited college of business at a regional university.  The study indicates that the decline in hours studied was likely an unintended result of using a process designed to demonstrate continuous improvement in teaching. The process utilized the Educational Testing Service’s SIR II student evaluation instrument as the only measure of teaching quality/effectiveness. The study concludes that the process may have pressured some instructors to sacrifice teaching rigor in an attempt to obtain more favorable student evaluations, thereby precipitating the decline in hours studied

Senior Citizens, Social Security, And Healthcare Costs

Based on an extensive literature review this paper discusses the interrelationships among the increasing numbers of Senior Citizens and the costs of Social Security and healthcare. This discussion includes information on Social Security pertaining to its funding and the Social Security Trust Funds. The paper notes that both the costs of Social Security and healthcare are directly related to improving healthcare. The ongoing improvements in healthcare result in increasing numbers of Senior Citizens who demand further improvements in healthcare. This leads to increases in longevity adding to healthcare and Social Security costs. Finally, the paper demonstrates the underlying complexities and the lack of consensus of possible changes to improve healthcare

Reducing The Downside Risk Of Not Receiving Anticipated Social Security Benefits By Using Personal Accounts

The government is not obligated to pay Social Security benefits and no one has the right to receive such benefits.  This paper presents the argument that opting for a personal account in conjunction with traditional Social Security is less risky than opting to have all of ones Social Security taxes go into traditional Social Security.  The overall downside risk of receiving lower than anticipated Social Security retirement income is reduced by diversifying to include personal accounts along with traditional Social Security.&nbsp

The Allergy Clinic: 50 years

There has been an allergy clinic at Red Cross Children’s Hospital from the day that the doors opened 50 years ago. This may not appear surprising given the prevalence of allergic conditions in children, but even today few major teaching hospitals in South Africa have paediatric allergy clinics – this despite the recent International Study of Asthma and Allergies in Children (ISAAC) which ranked South Africa twelfth in prevalence out of the 56 countries surveyed

Interaction between clients and physiotherapists in group exercise classes in geriatric rehabilitation

The aim of this paper is to explore how older people construct their interaction in group exercise classes in geriatric rehabilitation and what is their contribution to the interaction. Discourse analysis was employed and data, consisting of seven videotaped group-based exercise sessions, were collected from 52 older people (aged 66–93 years) and nine rehabilitation professionals in seven rehabilitation centres. Four discourse categories were found. In “taciturn exercising”, older people remained verbally silent but physically active. In “submissive disagreeing”, older people opposed the professionals’ agenda by displaying reluctant consent to proposals. In “resilient endeavouring”, older adults persisted on their course of action, regardless of the disapproval of the professionals. In “lay helping”, older people initiated spontaneous encouragement, but also gave verbal and physical assistance to their peers. Older people's meaningful contribution to interaction, whilst it may challenge the institutional flow of activities, can constitute an integral part of the re-ablement process of rehabilitation

The role of freestream turbulence scale in subsonic flow separation

The clarification of the role of freestream turbulence scale in determining the location of boundary layer separation is discussed. Modifications to the test facility were completed. Wind tunnel flow characteristics, including turbulence parameters, were determined with two turbulence generating grids, as well as no grid. These results are summarized. Initial results on the role of scale on turbulent boundary layer separation on the upper surface of an airfoil model are also discussed