Delta wing flutter based on doublet lattice method in NASTRAN

The subsonic doublet-lattice method (DLM) aeroelastic analysis in NASTRAN was successfully applied to produce subsonic flutter boundary data in parameter space for a large delta wing configuration. Computed flow velocity and flutter frequency values as functions of air density ratio, flow Mach number, and reduced frequency are tabulated. The relevance and the meaning of the calculated results are discussed. Several input-deck problems encountered and overcome are cited with the hope that they may be helpful to NASTRAN Rigid Format 45 users

Comparing COVID-19 policies: an analysis of COVID-19 response in Qatar and the United Arab Emirates

The novel coronavirus, COVID-19, first appeared in early 2020 and has since been able to spread rapidly across the globe. The rapid government response to the growing public health crisis created a unique opportunity to analyze and compare the COVID-19 related public health policies as enacted by various nations. Having dealt with the impact of MERS and SARS prior to the COVID-19 pandemic, the Middle East provides a distinct perspective into the question of whether prior exposure to public health crises prepared governments in the region to respond to COVID-19. Utilizing news sources reporting on public health policies in the region, as well as public health data as reported by the World Health Organization and the Coronavirus resource center: COVID-19 dashboard by the Center for Systems Science and Engineering at Johns Hopkins University, I compare policies and subsequent health outcomes in Qatar and the United Arab Emirates. Were prior public health crises advantageous to countries within the Middle East in terms of their ability to respond to the COVID-19 pandemic? Based on regional evidence of national and subnational public health policy responses taking place during the period of COVID-19 pandemic onset, which can be defined as winter to spring of 2020, in addition to regional morbidity and mortality rate, this paper concludes that the data suggests otherwise. The COVID-19 pandemic emphasized the importance of political actors having the capacity to offer effective public health policy responses, thus this paper offers a theoretical framework for why Qatar and the United Arab Emirates, despite their unique advantages, were equally unable to significantly lessen the number of confirmed cases and reported deaths due to COVID-19

Effects Of Teacher And Pupil Expectancy Upon School Achievement

The effects of self-fulfilling prophecies have been observed under various situations in the past, but Rosenthal and Jacobson\u27s recent South San Francisco study has probably stimulated increased public and professional interest in the effects of expectations on learning. It was felt that additional research in this area was desirable ·in order to further examine how and to what extent expectancies can influence learning situations. This study was designed to study the effects of informing randomly selected pupils and their teachers that these particular pupils had greater potential for school success than they had been demonstrating. It was hypothesized that if teachers and pupils developed a greater level of expectancy, improvements would be observed in school performance. In addition to the initial interviews for transmitting this information, reinforcement was provided for some of the sample students and teachers. The various possible combinations of the independent variables of: (1) informing pupils, (2) informing teachers, and (3) reinforcement led to the formation of eight cells. Two hundred pupils were selected at random from the seventh grade population and assigned randomly to the various treatments with cell sizes of twenty-five each

The effectiveness of a summer remedial reading program on one group of Stockton Elementary pupils

This study was designed to discover if results from the summer remedial reading program carry over into the following school year. The design intended (1) to show whether skills taught in the summer classes are retained, and (2) to measure the amounts and some of the kinds of retention throughout the following school year

Does the Thatcher effect extend to infant faces?

Decades of research on the mechanisms of face processing have demonstrated that humans rely heavily on configural processing strategies when viewing faces. However, this work has been done using almost exclusively adult facial stimuli. More recently, researchers have proposed that infant faces may elicit different neural activity and behavioral responses than adult faces. These observed differences may start at the very early stages of face processing (i.e., the structural encoding occurring within 200ms of seeing a face). However, no studies to date have explored potential differences in processing strategies used for infant faces compared to adult faces. The current study uses a well-established configural disruption known as the Thatcher Effect (TE) to investigate the use of configural processing for infant faces

Caregiver wellbeing and the role of resilience in seeking support when caring for an individual with dementia

A thesis submitted in partial fulfilment of the award of Practitioner Doctorate in Counselling Psychology at the University of Wolverhampton.Background & aims: To provide appropriate and suitable support to caregivers of people with dementia, it is important to explore the risk and protective factors related to their psychological wellbeing. The aim of this thesis, is firstly, to highlight lived experiences of dementia caregiver’s; secondly, to explore the role of psychological resilience in their ability to adapt and maintain their role; and finally, to identify and examine their perspectives of current support services in meeting their needs. Method: A sequential explanatory mixed method design was used. In Phase I participants completed a postal survey (n=45), including demographic information, a healthrelated quality of life measure and a psychological resilience scale. Results were used to inform and direct Phase II, in which semi-structured interviews were conducted (n=11), transcribed and analysed using thematic analyses. Results: The quantitative findings indicated that participants with higher mental health outcomes and high psychological resilience were more likely to access support services. Physical wellbeing had a greater association with factors related to providing care. Seven main themes were identified in the qualitative analysis, the majority relating strongly to a high degree of restricted opportunities and encroaching responsibilities. The findings indicate that caregivers are required to be flexible and adapt to their individual circumstances, within an ever-evolving situation. Implications: The results of this study suggest that identifying those with low levels of psychological resilience and wellbeing may be useful in identifying those in greater need of support. Recommendations for potential service developments are discussed, as well as the implications for Counselling Psychology practice

Near wake of the rarefied plasma flows at mesothermal speeds.

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76871/1/AIAA-1968-169-284.pd

Challenges and healthcare quality improvement strategies for asthma care for preschool children

Asthma is the most common chronic illness in children. Preschool children (age 0 to 5) in particular experience a disproportionate disease burden compared to all other age groups. Part of the puzzle is the diagnostic challenge presented in this age group, and another is the difficulties in the care and management of asthma. Compounding the issue are the well-documented racial disparities experienced by minorities. This paper reviews the literature documenting the difficulties and disparities facing minority preschoolers with respect to providing and receiving care for asthma and qualitative improvement strategies targeting healthcare. Due to the complexity of the disease, more research on evidence based strategies targeting this age group is needed as well as better documentation of implementation processes

Evaluating the Trophic Habits and Dietary Overlap of Two Deep-Sea Catsharks (Apristurus brunneus and Parmaturus xaniurus) in Central California, USA

In marine communities, there are often multiple species that occupy the same or similar niches. When resources are in short supply, competitive interactions can negatively affect the survival of one or both of the species involved. Understanding the trophic habits and interactions of species helps explain their role in a given ecosystem. Additionally, knowing the trophic habits of targeted or bycaught species captured in fisheries can help to influence management decisions on an ecosystem level. Apristurus brunneus and Parmaturus xaniurus (Family: Pentachidae) are abundant deep-sea predators native to the Northeastern Pacific Ocean. Central California offers a unique opportunity to study these sympatric species in a location where they have large populations and the potential to compete for dietary resources. This study identifies: (1) the dietary composition of each predator; (2) the biological and environmental factors associated with variation in their trophic habits; (3) the trophic level of each species; and (4) the level of trophic overlap and potential for interspecific competition between the two species. To investigate the trophic habits of these two predators, this study used two complimentary techniques: stomach content analysis (SCA) and stable isotope analysis (SIA). Specimens from both species were collected during fishery-independent trawl surveys along the central California coast. Stomachs (for SCA) and dorsal white muscle tissue (for SIA) were removed from sharks after biological and catch data were recorded for each individual, including potential explanatory variables (e.g. depth, latitude, longitude, maturity, season, sex, trawl composition, and total length). Trophic habits and trophic position were calculated for each species independently and the level of trophic overlap between each species were calculated for SCA and SIA. Both shark species consumed the same three major prey groups (shrimp, squid, and fishes), however A. brunneus exhibited a similar preference for all three prey categories, while P. xaniurus exhibited a preference for shrimp. Apristurus brunneus diet composition varied with sampling season, latitude, sex, and total length. In contrast, the diet of P. xaniurus only varied with sampling season and total length. The results of the SIA indicated similar results. In A. brunneus, δ15N varied with latitude, sex, and total length while δ13C varied with latitude and total length. Parmaturus xaniurus’ SIA variation was as a function of total length, latitude, and season for δ15N and δ13C varied with latitude and season. SCA and SIA metrics indicated that the size of dietary niche was consistently smaller for P. xaniurus. Species with a smaller niche size are considered to implement specialist feeding strategy, whereas a much larger niche (like A. brunneus) would indicate generalist diet. Despite the differences in the size of the dietary niche, both SCA and SIA found significant trophic overlap between the two species, such that P. xaniurus samples are nearly completely contained within the isotopic space of A. brunneus. While there is significant dietary overlap, in order for there to be competition between species resources must be limiting. In central California, resources are likely not limiting and these two species have implemented feeding strategies that maximize their net energy gain even when a strong co-competitor is present. Ultimately, the knowledge gained on the dietary and competitive habits of these two species improves our understanding of their role in the deep-sea ecosystem of central California and this new knowledge will aid managers in the implementation of ecosystem-based fisheries management