Housing flexibility effects on rotor stability

Preliminary rotordynamic evaluations are performed with a housing stiffness assumption that is typically determined only after the hardware is built. In addressing rotor stability, a rigid housing assumption was shown to predict an instability at a lower spin speed than a comparable flexible housing analysis. This rigid housing assumption therefore provides a conservative estimate of the stability threshold speed. A flexible housing appears to act as an energy absorber and dissipated some of the destabilizing force. The fact that a flexible housing is usually asymmetric and considerably heavier than the rotor was related to this apparent increase in rotor stability. Rigid housing analysis is proposed as a valuable screening criteria and may save time and money in construction of elaborate housing finite element models for linear stability analyses

Understanding the measurement of hunger and food insecurity in the elderly

The elderly are one of the population subgroups at greatest risk for hunger and food insecurity. To date, no accurate measures of this problem have been developed. What is needed are a thorough understanding of the phenomenon, and an assessment of how the elderly perceive and answer items commonly used to measure hunger and food insecurity in other subgroups. In-depth, open-ended interviews were conducted with forty-one low-income urban black and rural white residents of upstate New York. Results suggest a conceptual framework of food insecurity in the elderly with two significant differences from frameworks proposed for younger families: the major role of health problems and physical disabilities, and the impact of personal history on perceptions of food insecurity. In a telephone follow-up (approximately six months after the initial interviews) twenty-four respondents were asked commonly used food insecurity questionnaire items from six different sources. Results suggest that hunger and food insecurity among the elderly can be measured directly. The commonly used measures tested here will help categorize the stages of food insecurity. However, these direct measures might underestimate the prevalence of food insecurity because of a perceived reluctance to report problems with food.

Ecological characterization of the Florida springs coast: Pithlachascotee to Waccasassa Rivers

This report covers the upper coast of west-central Florida. This region includes the drainage basins and nearshore waters of the west coast of Florida between, but not including, the Anclote River basin and the Suwannee River basin. The name Springs Coast wash chosen because this area contains a multitude of springs, both named and too small or inaccessible to have been names. Much of the area is karstic limestone. Most recognizable among the springs are the famous Crystal river, Weeki Wachee, and Homosassa. This territory includes large expanses of marsh and wetland and, along its shores, the southern end of the largest area of seagrass beds in the state -- the Florida Big Bend Seagrass Beds preserve. It also possesses numerous spring-fed rivers and streams along the coast, whose constant discharges provide unique, relatively stable estuarine environments. This document is a summary of the available information on the Springs Coast area of Florida, for use by planners, developers, regulatory authorities, and other interested parties. An understanding of the factors affecting their plans and the possibly unexpected impacts of their actions on others will, it is hoped, promote intelligent development in areas capable of supporting it. We have tried to provide a clear, coherent picture of what is currently known about how the physical, chemical, and biological factors of the environment interact. (343 pp.

Perceived Wellness of College Professors, Faculty and Staff

With the current rise in various concerning health conditions, researchers are placing greater importance on overall wellness. The World Health Organization defines wellness as a state of complete physical, mental and social well-being, and not merely the absence of disease or infirmity. Additionally, wellness is thought to be a crucial component to living a higher quality of life. Previous studies suggest that physical activity could play a large role in overall perceived wellness; however, current research has yet to explore this relationship. PURPOSE: Therefore, the purpose of the current investigation was to determine the relationship between physical wellness and the alternative wellness dimensions of university employees. METHODS: Participants (n = 49) were asked to complete the Perceived Wellness Survey, a 36-item, 6-point Likert scale assessment (1. “Very strongly disagree” to 6. “Very strongly agree”), which measures the following six dimensions of wellness: physical, psychological, social, emotional, intellectual and spiritual, with six questions per dimension. The researchers employed a Pearson Product Moment Coefficient (α \u3c.05) to determine the relationship between physical wellness and the remaining dimensions (psychological, emotional, spiritual, social, and intellectual). RESULTS: The results of the statistical analysis recognized physical wellness to only significantly correlated with psychological wellness (r= .290, p= .043). The psychological wellness, however, significantly correlates with all wellness dimensions: emotional dimension (r=.344, p = .015), spiritual dimension (r=.510, p \u3c .001), social dimension (r=.499, p \u3c .001) and lastly, the intellectual dimension (r=.357, p=.012). CONCLUSION: These results suggest physical wellness may not directly correlate with the other dimensions, however, the significant correlates with the psychological dimension may infer an indirectly impact of physical wellness on the four alterative wellness dimensions. Furthermore, the researchers advises university employees to regularly participate in physical activity and exercise geared towards optimizing health and overall well-being

Vertex similarity in networks

We consider methods for quantifying the similarity of vertices in networks. We propose a measure of similarity based on the concept that two vertices are similar if their immediate neighbors in the network are themselves similar. This leads to a self-consistent matrix formulation of similarity that can be evaluated iteratively using only a knowledge of the adjacency matrix of the network. We test our similarity measure on computer-generated networks for which the expected results are known, and on a number of real-world networks

Parameterized Littlewood-Paley operators with variable kernels on Hardy spaces and weak Hardy spaces

In this paper, by using the atomic decomposition theory of Hardy space and weak Hardy space, we discuss the boundedness of parameterized Littlewood-Paley operator with variable kernel on these spaces.Comment: 15 pages. arXiv admin note: text overlap with arXiv:1711.0961

Command-level Police Officers’ Perceptions of the “War on Cops” and De-policing

Policing has been the subject of intense public scrutiny for the better part of two years after several high-profile police killings of unarmed African Americans across the United States. The scrutiny has been so extreme that some contend there is currently a “war on cops”—whereby citizens are emboldened by protests and negative media coverage of the police, and are lashing out by assaulting police officers more frequently. In response, it is argued that officers are de-policing (i.e. avoiding proactive stops). We surveyed command-level police officers from a southeastern state about their attitudes concerning the war on cops and de-policing. The majority of our sample believed there has been a war on cops over the last two years. Moreover, officers who felt strongly about the existence of a war on cops were more likely to believe that de-policing is common among officers in today’s world of law enforcement

Progress report on friction loss of slurries in straight tubes

This progress report summarizes the work to date on the experimental evaluation of the head loss of slurries flowing in horizontal and vertical tubes. The slurries used in the investigation were spherical glass beads and ion exchange resin particles suspended in water. The tube size used was approximately 0. 3-in. inside diameter. Concentrations from zero to approximately 50 percent by weight were used