Studio delle prestazioni di un SARP in configurazione multirotore

Lo studio, svolto preso il laboratorio di meccanica del volo, ha permesso di studiare le prestazioni di un SARP in configurazione multirotore. Grazie all'ausilio di un banco prova sono stati caratterizzati due sistemi propulsivi. Il programma creato permette di impostare la percentuale di throttle a cui si vuole volare in condizioni di hovering e fornisce la capacità del pacco batterie da utilizzare e l'autonomia di volo consentita.

What happens at the gap between knowledge and practice? Spaces of encounter and misencounter between environmental scientists and local people

Researchers studying processes of global environmental change are increasingly interested in their work having impacts that go beyond academia to influence policy and management. Recent scholarship in the conservation sciences has pointed to the existence of a research-action gap and has proposed various solutions for overcoming it. However, most of these studies have been limited to the spaces of dissemination, where the science has already been done and is then to be passed over to users of the information. Much less attention has been paid to encounters that occur between scientists and nonscientists during the practice of doing scientific research, especially in situations that include everyday roles of labor and styles of communication (i.e., fieldwork). This paper builds on theories of contact that have examined encounters and relations between different groups and cultures in diverse settings. I use quantitative and qualitative evidence from Madidi National Park, Bolivia, including an analysis of past research in the protected area, as well as interviews (N = 137) and workshops and focus groups (N = 12) with local inhabitants, scientists, and park guards. The study demonstrates the significance of currently unacknowledged or undervalued components of the research-action gap, such as power, respect, and recognition, to develop a relational and reciprocal notion of impact. I explain why, within such spaces of encounter or misencounter between scientists and local people, knowledge can be exchanged or hidden away, worldviews can be expanded or further entrenched, and scientific research can be welcomed or rejected.

Guardas prisionais, contextos de atuação e motivações

O contexto prisional tem recebido nos últimos anos uma grande atenção por parte dos investigadores portugueses. Porém, esse estudo não se têm centrado nos guardas prisionais, como grupo profissional. Dada a inexistência de pesquisas sobre esta temática, o presente estudo pretende analisar os contextos em que se desenrola o exercício das funções dos guardas prisionais, uma vez que estas podem produzir desmotivação e desgaste profissional nestes indivíduos. A investigação decorreu com a participação de guardas prisionais, a exercer funções nos Estabelecimentos Prisionais de Chaves, Lamego e Izeda. Para serem atingidos os objetivos propostos, optou-se pelo método qualitativo,através da aplicação de entrevistas semiestruturadas como instrumento de recolha de dados. Durante o mês de Abril e Maio de 2016 foram realizadas entrevistas a quinze guardas prisionais que trabalhavam em contacto direto com os reclusos. Ao longo da análise das entrevistas ficaram patentes nas declarações algumas fontes de desmotivação devido ao congelamento de salários e das progressões na função pública, à inexistência de concursos internos e à ineficácia e injustiça das avaliações de desempenho. Por outro lado, os profissionais estudados afirmam sentir uma fraca valorização das suas funções no serviço, a par de uma má imagem da sua profissão, difundida e sustentada pelos meios de comunicação social. Estes fatores podem contribuir para que eles próprios não se sintam identificados com o grupo profissional ao qual pertencem. Finalmente, os entrevistados manifestam sentir uma falta de formação contínua, cuja existência consideram fundamental.

MLCut: exploring multi-level cuts in dendrograms for biological data.

Choosing a single similarity threshold for cutting dendrograms is not sufficient for performing hierarchical clustering analysis of heterogeneous data sets. In addition, alternative automated or semi-automated methods that cut dendrograms in multiple levels make assumptions about the data in hand. In an attempt to help the user to find patterns in the data and resolve ambiguities in cluster assignments, we developed MLCut: a tool that provides visual support for exploring dendrograms of heterogeneous data sets in different levels of detail. The interactive exploration of the dendrogram is coordinated with a representation of the original data, shown as parallel coordinates. The tool supports three analysis steps. Firstly, a single-height similarity threshold can be applied using a dynamic slider to identify the main clusters. Secondly, a distinctiveness threshold can be applied using a second dynamic slider to identify “weak-edges” that indicate heterogeneity within clusters. Thirdly, the user can drill-down to further explore the dendrogram structure - always in relation to the original data - and cut the branches of the tree at multiple levels. Interactive drill-down is supported using mouse events such as hovering, pointing and clicking on elements of the dendrogram. Two prototypes of this tool have been developed in collaboration with a group of biologists for analysing their own data sets. We found that enabling the users to cut the tree at multiple levels, while viewing the effect in the original data, is a promising method for clustering which could lead to scientific discoveries.

High Quality Acoustic Time History Measurements of Rotor Harmonic Noise in Confined Spaces

A methodology has been developed and presented to enable the use of small to medium scale acoustic hover facilities for the quantitative measurement of rotor impulsive noise. The methodology was applied to the University of Maryland Acoustic Chamber resulting in accurate measurements of High Speed Impulsive (HSI) noise for rotors running at tip Mach numbers between 0.65 and 0.85 – with accuracy increasing as the tip Mach number was increased. Several factors contributed to the success of this methodology including: • High Speed Impulsive (HSI) noise is characterized by very distinct pulses radiated from the rotor. The pulses radiate high frequency energy – but the energy is contained in short duration time pulses. • The first reflections from these pulses can be tracked (using ray theory) and, through adjustment of the microphone position and suitably applied acoustic treatment at the reflected surface, reduced to small levels. A computer code was developed that automates this process. The code also tracks first bounce reflection timing, making it possible to position the first bounce reflections outside of a measurement window. • Using a rotor with a small number of blades (preferably one) reduces the number of interfering first bounce reflections and generally improves the measured signal fidelity. The methodology will help the gathering of quantitative hovering rotor noise data in less than optimal acoustic facilities and thus enable basic rotorcraft research and rotor blade acoustic design.

Koumansetta hectori Smith, 1957

Many aquarists know this fish as Ambylgobius hectori but accepted name is actually Koumansetta hectori. K. hectori, Hector's goby, is a species of goby native to the Indian Ocean (including the Red Sea), first record from Persian Gulf (Kish Island, Iran) to the islands of Micronesia in the western Pacific Ocean. It can be found on sheltered coral reefs at depths of from 3 to 30 meters (though usually between 5 to 20 meters). This species reaches a length of 8.5 centimeters (3.3 in) SL. This attractive little fish measures only 2” at maturity and spends its time hovering over rocks and substrates out in the open water column. Known for their bold yellow stripes, peaceful disposition, the diminutive Hector’s Goby is a nano reef favorite. It can also be found in the aquarium trade.

Some results on open-edge and open mobile guarding of polygons and triangulations

This paper focuses on a variation of the Art Gallery problem that considers open-edge guards and open mobile-guards. A mobile guard can be placed on edges and diagonals of a polygon, and the ‘open’ prefix means that the endpoints of such an edge or diagonal are not taken into account for visibility purposes. This paper studies the number of guards that are sufficient and sometimes necessary to guard some classes of simple polygons for both open-edge and open mobile-guards. A wide range of polygons is studied, which include orthogonal polygons with or without holes, spirals, orthogonal spirals and monotone polygons. Moreover, this problem is also considered for planar triangulation graphs using open-edge guards.

Breaking through the Margins: Pushing Sociopolitical Boundaries Through Historic Preservation

“Breaking through the Margins: Pushing Sociopolitical Boundaries Through Historic Preservation” explores the ways in which contemporary grassroots organizations are adapting historic preservation methods to protect African American heritage in communities that are on the brink of erasure. This project emerges from an eighteen-month longitudinal study of three African American preservation organizations—one in College Park, Maryland and two in Houston, Texas—where gentrification or suburban sprawl has all but decimated the physical landscape of their communities. Grassroots preservationists in Lakeland (College Park, Maryland), St. John Baptist Church (Missouri City, Texas), and Freedmen’s Town (Houston, Texas) are involved in pushing back against preservation practices that do not, or tend not, to take into consideration the narratives of African American communities. I argue, these organizations practice a form of preservation that provides immediate and lasting effects for communities hovering at the margins. This dissertation seeks to outline some of the major methodological approaches taken by Lakeland, St. John, and Freedmen’s Town. The preservation efforts put forth by the grassroots organizations in these communities faithfully work to remind us that history without preservation is lost. In taking on the critical work of pursuing social justice, these grassroots organizations are breaking through the margins of society using historic preservation as their medium.

DA Formação inicial ao primeiro ano de serviço efetivo : Curso de Formação de Guardas 2014/2015

Num mundo atual, em que a globalização imprime os seus efeitos sobre as dinâmicas sociais, o acesso à informação e ao conhecimento é instantâneo e produzido ao minuto. A sociedade torna-se cada vez mais exigente com os serviços a si prestados, obrigando assim, a uma constante especialização dos funcionários e entidades que os prestam. As populações tornaram-se mais rigorosas no que respeita aos serviços prestados pela Guarda. Estes serviços terão tanto mais qualidade quanto maior for a preparação dos militares para lidar com a complexidade dos problemas que diariamente são sentidos e vividos pelas populações. A capacidade de respostas proativas por parte da GNR assenta num processo de formação eficaz e adequada aos militares que contactam diretamente com a população. A investigação aplicada levada a cabo neste trabalho tem como objetivo geral, compreender de que forma a formação ministrada no Curso de Formação de Guardas está alinhada com a atividade territorial da Guarda. Para esta investigação foram selecionados dois instrumentos de recolha de dados: o inquérito por questionário, que foi aplicado aos Guardas Provisórios no término do curso; e a entrevista, aplicada aos formadores (Oficiais e Sargentos) que os acompanharam no decorrer do referido curso. Tendo em conta os dados recolhidos, constata-se que existe a necessidade de direcionar a formação ministrada, de uma forma mais contundente, para as exigências da função de patrulheiro da Guarda. As tarefas nucleares de atendimento ao público e de elaboração de expediente são, com base na opinião dos formadores e formandos, uma fragilidade do curso. A formação ministrada no CFG está em certa medida alinhada com a atividade territorial da GNR e transmite indubitavelmente os conhecimentos essenciais aos futuros militares da Guarda. No entanto, existem aspetos que merecem especial atenção por parte da Instituição.

The Amplifier - v. 11, no. 10

In this issue...Butte Tennis Club, Coach Downey, Talent Show, Anaconda Company, Copper Guards, Graduates, Butte YMCA, Intramural Sports, Alex Chaky

The Amplifier - v. 12, no. 6

In this issue...Archaeology, Walkerville, Mardi Gras, Selective Service, Copper Guards, Virginia City, Sheriff Henry Plummer, Civil Rights, Montana Power Company

The Amplifier - v. 13, no. 10

In this issue...M Day, Copper Guards, Spring Football, Student Wives, Ray Braun, Summer Winds Trio, World War II, Kangaroo Court, ASMT

The Amplifier - v. 14, no. 11

In this issue...Copper Guards, International Club, Magma Yearbook, Astrophysics, Roger Pierce, Ed Simonich, Mike Mansfield, M Club, Income Tax, Biology Department

The Proceedings of the South Carolina Historical Association

Annually, the association publishes a journal, The Proceedings, which consists of papers presented at the annual meeting. Christopher Gadsden and the Stamp Act by Robert H. Woody –Duke University The Nullification Controversy in an Up-Country District by J. Mauldin Lesesne – Greenville High School The Constitutional Organization and Mobilization of the National Guards of the French Revolution by Charles N. Sisson – Coker College The Mud-Sill Theory in South Carolina by Rosser H. Taylor – Furman University “Addressers of Clinton and Arbuthnot” edited by Robert W. Barnwell, Jr. Appendix-Letters and Papers of Governor David Johnson and Family, 1810-1855 by Florence Johnson Scott

Implicaciones humanitarias de la contratación de empresas militares privadas (PMC) por parte de los Estados. Estudio de caso; Estados Unidos y Blackwater en Irak (2003-2007)

La presente investigación tiene como finalidad analizar las implicaciones humanitarias de la participación de las Compañías Militares Privadas (PMC) contratadas por los Estados en escenarios de conflicto, a partir del caso de Blackwater y Estados Unidos en Irak (2003-2007), con el fin de mostrar a través de algunos hechos específicos como el acaecido en la plaza Al Nisour los vacíos existentes en la regulación de sus actividades. Frente a estos hechos se muestra como la Comunidad Internacional ha tratado de avanzar en la creación de un régimen internacional que las controle, sin embargo, como se evidencia a lo largo de este escrito la falta de compromiso por parte de los Estados ha hecho que esta tarea se vea obstaculizada y por lo tanto la actuación de estas compañías se encuentra aún en una zona jurídica gris.