External fins and ejector action for reducing the infrared emission of engine exhaust ducting

An analytical investigation was conducted to determine the feasibility of using external fins and ejector action on the exhaust ducting of a helicopter to reduce the infrared emission of the aircraft. Temperatures were calculated for both circular disk fins and pin fins. Results show that combining ejector action with fins can lower the metal temperature to acceptable levels at least for high flight speeds

Innovator, 1983-07-04

The Innovator was a student newspaper published at Governors State University between March 1972 and October 2000. The newspaper featured student reporting, opinions, news, photos, poetry, and original graphics

Agricultura de montanha: uma prioridade latente na agenda da pesquisa brasileira.

Introdução; Breve histórico do reconhecimento da importância das montanhas; Definição de montanha; Especialidades dos ambientes de montanha; Desenvolvimento sustentável em ambientes de montanha; Agricultura de montanha; Considerações finais

Not a fairy tale: archives tell a story about clammed up natives and crabby invaders

Natural history museum collections are valuable archives of the past. They store selective moments in form of individual organisms that are linked to a particular date and place. Repeated collection events over several years of identical species from the same places results in time series. These time series are invaluable because they store information about the changes in biodiversity and adaptations of species. By applying modern analyses techniques like ancient DNA (aDNA) methods and shot- gun sequencing, the genetic data of worldwide 1.5 billion historic collection entries can be made available and investigated today. Because of this research potential, natural history museum collections represent an essential basis for scientific questions, particularly in relation to long-term environmental changes caused by climate change and globalisation. In the course of this thesis, three studies have been conducted on the basis of museum collections in the background of climate change and globalisation. First, the studies aimed to investigate the extinction event of the native European flat oyster Ostrea edulis, as well as the impact of the neozoan common limpet slipper Crepidula fornicata on the oyster, since it was soon after its introduction accused to displace O. edulis. Secondly, the historical phylogeography of O. edulis was reconstructed to enlighten the processes of the extinction event further. Thirdly, the genetic population structure of long-established neozoa like the Chinese mitten crab Eriocheir sinensis was investigated in order to find potential adaptation or differentiation processes to its new environment. Both native and neozoan species were selected for their ecological and economic importance, which is why many museum collections hold time series of these species. The results of these studies showed that the extinction event of O. edulis in the North Sea can be successfully traced based on collection material. The shallow oyster beds on the coasts went extinct first, whereas the last living individual of the deeper oyster beds in the central North Sea was found in 1939. Moreover, the reconstruction of the historical distribution revealed that the population of C. fornicata increased only after the oyster beds went extinct. Thus, C. fornicata is despite its bad reputation not to blame for the extinction event of the European flat oyster in the North Sea. Additionally, by using aDNA methods on dry shells from museum collections, the historical phylogeography of O. edulis was successfully depicted in its native range for the first time. These modern methods unveiled the historical population structure of the European flat oyster across Europe in the late 19th century – including the now extinct populations of the Wadden Sea. The innovation of this historical study in comparison with present-day studies was the discovery of the autochthon- ous haplogroup in the Wadden Sea. This haplogroup has not yet been detected in current oyster beds in other locations, assuming this haplogroup could be extinct today. This offers a possible explanation why the oyster has not resettled the Wad- den Sea until now. Lastly, the public databases (e.g. GenBank, BOLD) were used for population genetic analyses on the Chinese mitten crab E. sinensis. This invasive crab has been introduced to Europe at the beginning of the 20th century and spread rapidly over countries ever since. The results revealed unique haplotypes occurring in Northern Germany that has not been found in the native range. These haplotypes suggest genetic differentiation and adaptation processes in response to the new environment during the past century. Finally, the natural history collections proved to be a valuable tool for different research questions. Whereas the impact of climate change could not be verified on the basis of these preliminary studies, the influence of globalisation is evident. Therefore the results of the historical studies will help to better understand the processes in the future

Aurora Volume 86

College formerly located at Olivet, Illinois and known as Olivet University, 1912-1923; Olivet College, 1923-1939, Olivet Nazarene College, 1940-1986, Olivet Nazarene University, 1986-https://digitalcommons.olivet.edu/arch_yrbks/1152/thumbnail.jp

agir para prevenir

Mestrado, Enfermagem Comunitária, 2014, Escola Superior de Enfermagem de LisboaO cancro do colo do útero (CCU) constitui um importante problema de saúde da mulher, sendo atualmente, uma patologia que pode ser evitada e controlada, na medida em que se conhecem os fatores de risco. Neste sentido, são de extrema importância as estratégias de enfermagem no âmbito da prevenção primária e secundária do CCU, bem como as intervenções sobre os determinantes sociais da saúde (DSS) através de um processo de educação para a saúde (EpS). O projeto de intervenção comunitária foi realizado no ACES Lisboa Central, na USF Sétima Colina, e teve como objetivo geral “promover o autocuidado das mulheres com idades compreendidas entre os 20 e os 64 anos, inscritas na USF Sétima Colina, relativamente aos comportamentos preventivos do HPV e CCU”. Seguiu-se a metodologia do Planeamento em Saúde, de acordo com Tavares (1990) e Imperatori & Giraldes (1993) e como referencial teórico recorreu-se à Teoria do Autocuidado de Dorothea Orem (1995). Para o diagnóstico de situação, aplicou-se um questionário para a colheita de dados, designado “Cancro do colo do útero: conhecimentos e comportamentos” (Vicente, 2006). Identificados os problemas, estes foram priorizados segundo a Grelha de Análise, tendo resultado como problemas prioritários: deficit de conhecimentos relacionado com os fatores de risco do CCU; deficit de conhecimentos relacionado com o método de rastreio do CCU (diagnóstico CIPE ® Versão 2). As intervenções selecionadas ocorreram ao nível da prevenção primária, optando-se por uma estratégia de intervenção individual alicerçada na EpS, tendo em consideração os domínios de aprendizagem. A avaliação de acordo com os indicadores de atividade, adesão e participação, sugere alterações significativas ao nível das cognições, o que nos leva a admitir futuros ganhos em saúde, na população abrangida

Anticipating Bifurcations for Identifying Dynamic Characteristics of Complex Systems

Complex systems are at risk of critical transitions when the system shifts abruptly from one state to another when a threshold is crossed. Recent studies have revealed that a variety of systems, ranging from systems examined by engineering, physics, and biology, to others related to climate sciences, medicine, social sciences, and ecology are susceptible to transitions leading to drastic re-organization or collapse. Such an unexpected transition is usually undesirable, because it is often difficult to restore a system to its pre-transition state once the transition occurs. It is exceedingly difficult to know if a system comes close to critical transitions because typically no easily noticeable changes can be observed unless the transition happens. Furthermore, accurate models are often not available, and predictions based on models of limited accuracy face difficulties. Hence, we are still ill-equipped to predict critical transitions, and there is an acute need for reliable methods to predict such catastrophic events. In this research, a data-driven, model-free approach is introduced to forecast critical points and post-critical dynamics of complex dynamical systems using measurements of the system response collected only in the pre-transition regime. Based on observations of the system response to perturbations only in the pre-transition regime, the method forecasts the bifurcation diagram and discovers the system’s stability after the transition. The forecasting approach is based on the phenomenon of critical slowing down, referring to the slowing down of a system's dynamics when approaching a tipping point. The rate of the system’s recovery from perturbations decreases when the system approaches the transition. Thus, the rate of recovery from perturbations can be used as an indicator, and is correlated to the distance to the transition. The method is employed to forecast critical transitions in several classes of complex systems including flutter instabilities in fluid-structural systems, collapse of natural populations in ecological systems, and the onset of traffic congestions in vehicular traffic flow systems. The theoretical and experimental results of this study address important challenges in forecasting safety and stability of complex systems. The capabilities of the methods proposed make them unique tools for analysis of complex systems in both computational and experimental studies.PHDMechanical EngineeringUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttps://deepblue.lib.umich.edu/bitstream/2027.42/151735/1/aghadami_1.pd

Implementación de un sistema de categorización y producción de fotografía paisajista del Ecuador, para exportar al mercado Estadounidense – Nueva York por la micro empresa Foto Studio Digital Maldonado de la ciudad de Riobamba para el período 2012-2015

La presente tesis titulada: Implementación de un Sistema de Categorización y Producción de Fotografía paisajista del Ecuador, para exportar al mercado Estadounidense – Nueva York por la Micro empresa Foto Studio Digital Maldonado, percibe los siguiente objetivos convertirse o incrementar su competitividad como Micro empresa a nivel nacional y a la vez Internacional, dar a conocer la belleza de nuestro país como son los paisajes. Dentro del estudio de mercado se determinó la oferta existente, así mismo fijado el análisis de comercialización, efectuado a la vez un estudio técnico donde describe los requerimiento de documentos para proceder la exportación de fotografías ya que por medio de la metodología de Observación se ha demostrado estadísticamente que si son llamativas las fotografías paisajistas para el mercado extranjero. Según el ministerio de Turismo se ha demostrado un gran porcentaje de extranjeros que visitan nuestro país de esta manera expongo que la exportación o venta de fotografías hacia el mercado de Nueva york resultar útil, a más de ello el Gerente General de la Micro Empresa Foto Studio Digital Maldonado se da a conocer por su trabajo e iniciativa ya que a lo largo de la investigación ha seguido entablando relaciones comerciales con personas del mercado EstadounidenseThe present research is about the implementation of a classification system for the Ecuadorian landscaping photography production, for exporting it to the North American market- New York by Foto Studio Digital Maldonado Micro company, which goals are: to become a national and international competitive company, to increase its competitiveness and let the people know about the beauty of our country specially the landscapes. Within the marketing study, it was determined the existing offer, as well as the commercialization analysis, by making a technical study which describes the required documents for exporting the pictures, according to the observation methodology, it has been statistically proved that the landscaping pictures are attractive for the foreign market. According to the Ministry of Tourism, it has been shown that a high percentage of foreigners visit our country, that is why it is useful to export or sell pictures to the North American market, additionally the manager of Foto Studio Digital Maldonado micro company will be know due to this work and creativity, since he has established commercial with people from the north American market while the research has been carried out

Vision 21: Interdisciplinary Science and Engineering in the Era of Cyberspace

The symposium Vision-21: Interdisciplinary Science and Engineering in the Era of Cyberspace was held at the NASA Lewis Research Center on March 30-31, 1993. The purpose of the symposium was to simulate interdisciplinary thinking in the sciences and technologies which will be required for exploration and development of space over the next thousand years. The keynote speakers were Hans Moravec, Vernor Vinge, Carol Stoker, and Myron Krueger. The proceedings consist of transcripts of the invited talks and the panel discussion by the invited speakers, summaries of workshop sessions, and contributed papers by the attendees