Computing induced velocity perturbations due to a helicopter fuselage in a free stream

The velocity field of a representative helicopter fuselage in a free stream is computed. Perturbation velocities due to the fuselage are computed in a plan above the location of the helicopter rotor (rotor removed). The velocity perturbations computed by a source-panel model of the fuselage are compared with experimental measurements taken with a laser velocimeter. Three paneled fuselage models are studied: fuselage shape, fuselage shape with hub shape, and a body of revolution. The velocity perturbations computed for both fuselage shape models agree well with the measured velocity field except in the close vicinity of the rotor hub. In the hub region, without knowing the extent of separation, modeling of the effective source shape is difficult. The effects of the fuselage perturbations are not well-predicted with a simplified ellipsoid fuselage. The velocity perturbations due to the fuselage at the plane of the measurements have magnitudes of less than 8 percent of free-stream velocity. The velocity perturbations computed by the panel method are tabulated for the same locations at which previously reported rotor-inflow velocity measurements were made

A Positive Approach Toward Unit Functioning in Higher Education

This companion dissertation reports the findings of applied case study research on four community college organizational units that consistently meet or exceed standard performance measures. In addition, prior ample evidence confirms that performance extended significantly beyond what might be explained by available tangible resources alone. The case study contexts are common in higher education in general: a) an external partnership, (b) an ad hoc team, (c) a traditional, cross-divisional service unit, and (d) a grant-funded student service unit. Emerging positive organizational theory and research show promise for revealing performance-influencing phenomena and behaviors that are not adequately represented in standard measures. Therefore, this collaborative case study research was designed to explore positive influences on the success of the four community college units. This companion dissertation contains three manuscripts. Chapter 2, a technical report, contains the collaboratively-written synthesis of findings from the four individual case studies. Key findings across the units suggest the influence on performance of: (a) a people-first culture, (b) authentic, trusting, inclusive leadership, and (c) resource richness beyond constrained tangible resources. This collective analysis reveals that leveraging resources for capacity building can help make the difference between an organization that performs adequately and one that performs beyond expectations. In Chapter Three this researcher examines an individual case study of a community college student support services unit. I found that this unit’s culture influences high performance by putting people first, leveraging intangible resources, and providing leaders and all unit members with autonomy and support. I also discovered that relationships, tacit knowledge, diversity, leadership qualities, and traits of unit members when leveraged in combination improved functioning and performance the most. In Chapter Four, I suggest that the recommendations for high performance made in Chapter Three can be applied to a newly developed virtual coaching network, whose members provide student services in a virtual environment. The actions recommended to help the network meet what appear to be conflicting administrative goals are: (a) identify unit strengths, (b) connect strengths to the unit mission, (c) develop constructive relationships, and (d) identify and leverage resources. KEYWORDS: community colleges, organizational functioning, student services, virtual teams, positive organizational scholarshi

Investors in People : research on the New Choices approach

"Investors in People (IIP) is a business development tool that was first launched in 1991. The IIP Standard enables organisations to assess how they are managing people, and where improvements can be made. There are 39 evidence requirements which must be met for an organisation to be recognised as meeting the IIP Standard. The New Choices approach to IIP was introduced in May 2009 to provide greater flexibility and customisation of IIP to an employer’s priorities and goals. It also allows progress beyond the IIP Standard and incorporates additional recognition in the form of Bronze, Silver and Gold award levels (for which organisations must provide evidence that they meet at least 65, 115 or 165 evidence requirements respectively). In April 2010, the UK Commission for Employment and Skills took over strategic ownership of IIP and was keen to understand the differences made by New Choices. The overall aim of this research is to identify the impact that the New Choices approach has had on perceptions and take up of IIP, with a view to informing future strategy for IIP and contributing to meeting longer-term objectives for IIP. The project methodology included: preliminary research (familiarisation with the IIP literature review, a review of management information, and discussions with key stakeholders); an e-survey of employers engaged with the New Choices approach; and 15 employer case studies to add depth to the understanding of how New Choices was working in practice. The New Choices approach was introduced across the UK in May 2009 (after being piloted in Scotland and some parts of England), so at the time of writing has been operational for less than two years. This is a relatively short period of time in which to judge the impact of the New Choices approach, as further benefits are likely to accrue over the long term. As such, this review has not identified significant direct benefits experienced by employers who have followed the extended framework and achieved a Bronze, Silver or Gold award level, though it has identified some changes that may contribute to increased business efficiency" - page i

A Balanced Energy Plan for the Interior West

Describes a Balanced Energy Plan for the Interior West region of Arizona, New Mexico, Nevada, Utah, Colorado, Wyoming and Montana. Part of the Hewlett Foundation Energy Series

Exploring Teachers’ Language Assessment Literacy: A Social Constructivist Approach to Understanding Effective Practices

Exploring teachers’ levels of assessment literacy in terms of their previous assessment experiences may help teacher educators to better understand the factors which promote or prevent effective assessment, thus contributing to more targeted and empowering teacher education. The research presented in this paper adopts a social constructivist model of learning and meaning-making, with the language classroom representing the community of practice. The first phase of the project consisted of interviews with teachers, in which they were invited to estimate their understanding of individual components of the assessment process and indicate how much they would like to learn about each. Classroom observations then took place followed by post-observation, reflective interviews. Finally, focus group discussions were conducted with further groups of experienced teachers. Four key findings are presented, highlighting the considerable differences in understanding which exist between teachers and those who research and write about language testing/assessment

Endothelial dysfunction in a child with Pearson marrow-pancreas syndrome managed with Descemet stripping automated endothelial keratoplasty using a suture pull-through techniqu

A 4-year-old girl with a history of Pearson marrow-pancreas syndrome presenting with severe, progressive photophobia was found to have bilateral, diffuse corneal thickening and peripheral pigmentary retinopathy. She underwent Descemet stripping automated endothelial keratoplasty (DSAEK) surgery in both eyes using a modified suture pull-through technique. Postoperatively there was no evidence of cataract formation or graft detachment; her corneas thinned, and her photophobia improved dramatically

Detection of Campylobacter concisus and other Campylobacter species in colonic biopsies from adults with ulcerative colitis

Peer reviewedPublisher PD