Investigation of empennage buffeting

Theoretical methods of predicting aircraft buffeting are reviewed. For the buffeting due to leading edge vortex breakdown, a method is developed to convert test data of mean square values of fluctuating normal force to buffeting vortex strength through an unsteady lifting-surface theory and unsteady suction analogy. The resulting buffeting vortex from the leading edge extension of an F-18 configuration is used to generate a fluctuating flow field which produces unsteady pressure distribution on the vertical tails. The root mean square values of root bending moment on the vertical tails are calculated for a rigid configuration

Sustainable Urban Planning and Climate Change Scenarios: An Investigation of Staten Island\u27s Urban Planning

Recent events like Hurricane Sandy, which struck Staten Island, NY on October 29, 2012, serve as a costly reminder of how unsustainable designs and mounting social pressures can contribute to extensive structural damage and subsequent financial cost, from storm surge inundation and coastal flooding. It is unlikely that Hurricane Sandy was a one-time event but rather a warning of what can occur over the next century without proper mitigation strategies. Based on climate change projections, such extreme events are expected to become more frequent and intense due to warmer sea surface temperatures and rising sea levels (Emmanual, 2005; Kirtman et. al., 2013). To mitigate impacts and improve resiliency, we need to devise and implement robust planning strategies that reduce society\u27s exposure and vulnerability to extreme environmental hazards. Hurricane Sandy presents an opportunity to rethink existing designs and place environmental constraints to development at the forefront. In the 1960s, Ian McHarg conducted a land use suitability on Staten Island and deemed most of the extensively damaged areas unsuitable for urbanization (McHarg 1969, Wagner et al,. forthcoming). Best practices suggest, urban areas should be buffered from coastlines and riverbanks to reduce their exposure to flooding. The next best approach is to devise and implement stormwater management and other mitigating measures. As part of the recovery process, a number of resilient strategies on Staten Island such as elevating urban structures, expanding greenbelts, and incorporating natural buffers have been proposed to ameliorate existing threats and those attributable to climate change (e.g., sea level rise and increased coastal flooding). While these designs address vulnerability to inundation, questions arise as to how resilient these strategies will be to future coastal flooding and extreme events

Algal Blooms in Arkansas Streams, Ponds, and Lakes

Did you know that algae are a natural part of ponds, lakes, streams, and rivers? These organisms grow in the water (plankton) and on rocks, plants, and other surfaces (periphyton) and sometimes periphyton slough off into the water (seston). Most of the time these algae are hardly noticeable in waterbodies; however, sometimes they can form very noticeable algal blooms

"Transformai As Velhas Formas do Viver: Sobre As Potências da Fotografia Junto As Paisagens Urbanas"

A partir do encontro de uma frase pichada no parapeito de uma ponte, a presente pesquisa indaga sobre as paisagens urbanas e alguns dos modos de subjetivação em curso na cidade de Vitória. Em conjunto com o Laboratório de imagens da subjetividade (LIS), o pesquisador questiona-se sobre as possibilidades de construção de um dispositivo de interferência urbana por meio da fotografia. Utilizando-se de uma metodologia do caminhar pelas ruas e junto a técnicas da fotografia, cria-se nesse trabalho uma trajetória imagética de um olhar singular daquele que perambula pelas ruas da cidade, e que em um movimento semelhante ao piscar dos olhos retém instantes desses lugares e de suas pessoas. Instantes nunca grandiosos, nunca relevantes para os grandes veículos, mas que ainda assim, como os homens infames em Michael Foucault, são repletos de narrativas sobre um cotidiano da vida que passa em paralelo a um discurso maior. A fotografia, portanto, para além de uma prática que se dedica ao instante decisivo, como proposto por Henri Cartier-Bresson, é também o exercício da construção de instantes infames, que resistem e procuram por vozes e ouvidos, dizem de si e convidam a uma fala que não a da mera transmissão de informação. Essa fotografia enquanto ferramenta de intervenção carrega consigo, as potências do puctum, as potências clínicas de uma ferroada, de uma flechada, que feito os buracos em um muro, são capazes de nos ferir e abrir fendas na superfície de nossas peles enrijecidas. Essa fotografia aliada à clínica, abre espaços para outros ares, outros olhares e outros possíveis modos junto à cidade. E será menos por vias da luz e mais pelos instantes de cegueira, enquanto o obturador da máquina fotográfica abre-se à luz e os olhos se fecham, enquanto entregamo-nos às trevas, que a cidade conta suas histórias não oficiais, não lineares: suas narrativas infames que potentes em suas diferenças, insistem em não se renderem ao desejo de conformismo do ta tudo dominado e aos aparelhos de captura e de manutenção de um poder que se gostaria hegemônico sobre a vida. Palavras Chave: Produção de subjetividade, Cidade, Fotografia, Clínica

Experimental studies of flow separation of three airfoils at low speeds

Wind tunnel tests were conducted on the NASA LS(1)-0421 Mod, NACA 2412 and NASA GA(W)-2 airfoil sections at a Reynolds number of 2.2 x 10(6) and a Mach number of 0.13. Detailed measurements of flow fields associated with turbulent boundary layers of these airfoils were obtained at pre-stall, near-stall, and post-stall angles of attack. Velocity and pressure survey results over the airfoil and in the associated wake, are presented for fully attached flow conditions through the stalled flow condition. Extensive force, pressure, tuft survey, hot-film survey, local skin friction and boundary layer data are also included

Experimental Studies of Flow Separation of the NACA 2412 Airfoil at Low Speeds

Wind tunnel tests have been conducted on an NACA 2412 airfoil section at Reynolds number of 2.2 x 10(exp 6) and Mach number of 0.13. Detailed measurements of flow fields associated with turbulent boundary layers have been obtained at angles of attack of 12.4 degrees, 14.4 degrees, and 16.4 degrees. Pre- and post-separated velocity and pressure survey results over the airfoil and in the associated wake are presented. Extensive force, pressure, tuft survey, hot-film survey, local skin friction, and boundary layer data are also included. Pressure distributions and separation point locations show good agreement with theory for the two layer angles of attack. Boundary layer displacement thickness, momentum thickness, and shape factor agree well with theory up to the point of separation. There is considerable disparity between extent of flow reversal in the wake as measured by pressure and hot-film probes. The difference is attributed to the intermittent nature of the flow reversal

Prevalência de anticorpos para toxoplasma gondii em soros de suínos de pedigree em Santa Catarina.

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Get it from the Source: Identifying Library Resources and Software Used in Faculty Research

Libraries and Information Technology departments aim to support the educational and research needs of students, researchers, and faculty members. Close matches between the resources those departments provide and the resources the institution’s community members actually use highlight the value of the departments, demonstrate fiscally responsibility, and show attentiveness to the community’s needs. Traditionally, libraries rely on usage statistics to guide collection development decisions, but usage statistics can only imply value. Identifying a resource by name in a publication demonstrates the value of that resource more clearly. This pilot project examined the full-text of articles published in 2016-2017 by faculty members at a mid-sized, special-focus institution to answer the questions “Do faculty members have university-provided access to the research tools they need to publish?” and “If not, where are they getting them?” Using a custom database, the presenters indexed every publication by author, publication, resources used, availability of the identified resources, and more. This pilot study can be adapted to projects at other institutions, allowing them to gain a better understanding of the strengths and weaknesses of their own institution’s offerings. In addition, they will be able to identify ways to use that data to negotiate for additional resources, inform strategic partnerships, and facilitate open discussions with the institution’s community