Differential habitat use by demographic groups of the redfinger rubble crab Eriphia gonagra (Fabricius, 1781)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Qualidade dos processos mecanizados de semeadura e colheita na cultura da soja

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Differences in habitat use of two sympatric species of Ameiva in East Costa Rica

Identifying the differences in habitat use for sympatric species is important for understanding the species preferences and the limits of population distribution. We studied the differences in the habitat use of two understudied sympatric species of Ameiva (A. festiva and A. quadrilineata) in a natural reserve of the Caribbean coast of Coast Rica. Ameiva quadrilineata showed a more restrictive habitat use pattern than A. festiva. A. quadrilineata's smaller body size may be one of the factors limiting its habitat range. Both species showed higher density in regenerated forests, while A. quadrilineata was never found in swamp forests. The air temperature and the meteorological condition at the moment of the survey also influenced the occurrence of the A. quadrilineata, while the juveniles of A. festiva were only affected by the meteorological condition. None of the studied variables seemed to affect the occurrence of A. festiva adults. The results of this study can be useful to evaluate possible changes in the species distribution patterns as a consequence of direct (i.e., deforestation) or indirect (i.e., climate change) human activities in the distribution area of these species.

Variation morphogeometrics of Africanized honey bees (Apis mellifera) in Brazil

The morphometrics of the honey bee Apis mellifera L., 1758 has been widely studied mainly because this species has great ecological importance, high adaptation capacity, wide distribution and capacity to effectively adapt to different regions. The current study aimed to investigate the morphometric variations of wings and pollen baskets of honey bees Apis mellifera scutellata Lepeletier, 1836 from the five regions in Brazil. We used geometric morphometrics to identify the existence of patterns of variations of shape and size in Africanized honey bees in Brazil 16 years after the classic study with this species, allowing a temporal and spatial comparative analysis using new technological resources to assess morphometrical data. Samples were collected in 14 locations in Brazil, covering the five geographical regions of the country. The shape analysis and multivariate analyses of the wing allowed to observe that there is a geographical pattern among the population of Apis mellifera in Brazil. The geographical variations may be attributed to the large territorial extension of the country in addition to the differences between the bioregions.

AccessMod 3.0: computing geographic coverage and accessibility to health care services using anisotropic movement of patients

Background Access to health care can be described along four dimensions: geographic accessibility, availability, financial accessibility and acceptability. Geographic accessibility measures how physically accessible resources are for the population, while availability reflects what resources are available and in what amount. Combining these two types of measure into a single index provides a measure of geographic (or spatial) coverage, which is an important measure for assessing the degree of accessibility of a health care network. Results This paper describes the latest version of AccessMod, an extension to the Geographical Information System ArcView 3.×, and provides an example of application of this tool. AccessMod 3 allows one to compute geographic coverage to health care using terrain information and population distribution. Four major types of analysis are available in AccessMod: (1) modeling the coverage of catchment areas linked to an existing health facility network based on travel time, to provide a measure of physical accessibility to health care; (2) modeling geographic coverage according to the availability of services; (3) projecting the coverage of a scaling-up of an existing network; (4) providing information for cost effectiveness analysis when little information about the existing network is available. In addition to integrating travelling time, population distribution and the population coverage capacity specific to each health facility in the network, AccessMod can incorporate the influence of landscape components (e.g. topography, river and road networks, vegetation) that impact travelling time to and from facilities. Topographical constraints can be taken into account through an anisotropic analysis that considers the direction of movement. We provide an example of the application of AccessMod in the southern part of Malawi that shows the influences of the landscape constraints and of the modes of transportation on geographic coverage. Conclusion By incorporating the demand (population) and the supply (capacities of heath care centers), AccessMod provides a unifying tool to efficiently assess the geographic coverage of a network of health care facilities. This tool should be of particular interest to developing countries that have a relatively good geographic information on population distribution, terrain, and health facility locations.

On the road through the Bolivian Amazon: a multi-level land governance analysis of deforestation

Previous studies have shown that collective property rights offer higher flexibility than individual property and improve sustainable community-based forest management. Our case study, carried out in the Beni department of Bolivia, does not contradict this assertion, but shows that collective rights have been granted in areas where ecological contexts and market facilities were less favourable to intensive land use. Previous experiences suggest investigating political processes in order to understand the criteria according to which access rights were distributed. Based on remote sensing and on a multi-level land governance framework, our research confirms that land placed under collective rights, compared to individual property, is less affected by deforestation among Andean settlements. However, analysis of the historical process of land distribution in the area shows that the distribution of property rights is the result of a political process based on economic, spatial, and environmental strategies that are defined by multiple stakeholders. Collective titles were established in the more remote areas and distributed to communities with lower productive potentialities. Land rights are thus a secondary factor of forest cover change which results from diverse political compromises based on population distribution, accessibility, environmental perceptions, and expected production or extraction incomes.

Simulation of the Impact of Dams and Fishing Weirs on Reproductive Potential of Silver-Phase American Eels in the Kennebec River Basin, Maine

I modeled the cumulative impact of hydroelectric projects with and without commercial fishing weirs and water-control dams on the production, survival to the sea, and potential fecundity of migrating female silver-phase American eels, Anguilla rostrata in the Kennebec River basin, Maine, This river basin has 22 hydroelectric projects, 73 water-control dams, and 15 commercial fishing weir sites. The modeled area included an 8,324 km(2) segment of the drainage area between Merrymeeting Bay and the upper limit of American eel distribution in the basin. One set of input,, (assumed or real values) concerned population structure (Le., population density and sex ratio changes throughout the basin, female length-class distribution, and drainage area between dams), Another set concerned factors influencing survival and potential fecundity of migrating American eels (i.e., pathway sequences through projects, survival rate per project by length-class. and length-fecundity relationship). Under baseline conditions about 402,400 simulated silver female American eels would be produced annually reductions in their numbers due to dams and weirs would reduce the realized fecundity (i.e., the number of eggs produced by all females that survived the migration). Without weirs or water-control dams, about 63% of the simulated silverphase American eels survived their freshwater spawning migration run to the sea when the survival rate at each hydroelectric dam was 9017, 40% survived at 80% survival per dam, and 18% survived at 60% survival per dam. Removing the lowermost hydroelectric dam on the Kennebec River increased survival by 6.0-7.6% for the basin. The efficient commercial weirs reduced survival to the sea to 69-76%( of what it would have been without weirs', regardless of survival rates at hydroelectric dams. Water-control dams had little impact on production in this basin because most were located in the upper reaches of tributaries. Sensitivity analysis led to the conclusion that small changes in population density and female length distribution had greater effects on survival and realized fecundity than similar changes in turbine survival rate. The latter became more important as turbine survival rate decreased. Therefore, it might be more fruitful to determine population distribution in basins of interest than to determine mortality rate at each hydroelectric project.

Facetas de la vulnerabilidad sociodemográfica de la provincia de Misiones (Argentina)

Geográficamente, el objetivo de este trabajo es describir e interpretar el comportamiento de la distribución de la población y su influencia en la vulnerabilidad y en la pobreza de los hogares y de los habitantes de una provincia argentina de frontera. Se consideran las Necesidades Básicas Insatisfechas, el hacinamiento, los problemas del hábitat y las viviendas, los servicios públicos y algunas repercusiones en la educación y la protección sanitaria.

Facetas de la vulnerabilidad sociodemográfica de la provincia de Misiones (Argentina)

Geográficamente, el objetivo de este trabajo es describir e interpretar el comportamiento de la distribución de la población y su influencia en la vulnerabilidad y en la pobreza de los hogares y de los habitantes de una provincia argentina de frontera. Se consideran las Necesidades Básicas Insatisfechas, el hacinamiento, los problemas del hábitat y las viviendas, los servicios públicos y algunas repercusiones en la educación y la protección sanitaria.

Facetas de la vulnerabilidad sociodemográfica de la provincia de Misiones (Argentina)

Geográficamente, el objetivo de este trabajo es describir e interpretar el comportamiento de la distribución de la población y su influencia en la vulnerabilidad y en la pobreza de los hogares y de los habitantes de una provincia argentina de frontera. Se consideran las Necesidades Básicas Insatisfechas, el hacinamiento, los problemas del hábitat y las viviendas, los servicios públicos y algunas repercusiones en la educación y la protección sanitaria.

When “Where” is More Important Than “When”: Birthplace and Birthdate Effects On The Achievement Of Sporting Expertise

In this study, we assessed whether contextual factors related to where or when an athlete is born influence their likelihood of playing professional sport. The birthplace and birth month of all American players in the National Hockey League, National Basketball Association, Major League Baseball, and Professional Golfer's Association, and all Canadian players in the National Hockey League were collected from official websites. Monte Carlo simulations were used to verify if the birthplace of these professional athletes deviated in any systematic way from the official census population distribution, and chi-square analyses were conducted to determine whether the players' birth months were evenly distributed throughout the year. Results showed a birthplace bias towards smaller cities, with professional athletes being over-represented in cities of less than 500,000 and under-represented in cities of 500,000 and over. A birth month/relative age effect (in the form of a distinct bias towards elite athletes being relatively older than their peers) was found for hockey and baseball but not for basketball and golf. Comparative analyses suggested that contextual factors associated with place of birth contribute more influentially to the achievement of an elite level of sport performance than does relative age and that these factors are essentially independent in their influences on expertise development.

Conhecimentos sobre a RNCCI: um estudo exploratório sobre a perceção dos alunos do curso de enfermagem

A Rede Nacional de Cuidados Continuados (RNCCI) foi criada em 2006 pelo decreto-lei nº 101/2006, no âmbito do Ministério da Saúde e da Segurança Social. A RNCCI tem como missão prestar os cuidados adequados, de saúde e apoio social, a todas as pessoas que, independentemente da idade, se encontrem em situação de dependência, e articula-se com os serviços de saúde e sociais já existentes. Para cumprir a sua missão, a RNCCI, necessita de uma equipa multidisciplinar, na qual integram vários profissionais, tais como: médicos, enfermeiros, assistentes sociais, psicólogos, entre muitos outros, de entre estes os enfermeiros são os profissionais que maior percentagem detêm na constituição da mesma. Daí que seja pertinente a realização de estudos de investigação, com enfermeiros e estudantes de enfermagem, nesta nova valência de cuidados. O presente estudo incide sobre os conhecimentos dos estudantes de enfermagem sobre a RNCCI, que frequentam o terceiro e quarto ano na Escola Superior de Saúde do Instituto Politécnico de Bragança. Sendo a questão de investigação deste estudo: “Quais os conhecimentos dos alunos de enfermagem do terceiro e quarto ano da licenciatura em enfermagem sobre a RNCCI?”. Foi realizado um estudo de natureza quantitativa, descritivo, correlacional, num plano transversal. Optou-se por um processo de amostragem não probabilística de conveniência, que refletisse a distribuição da população por ano de escolaridade. Assim, considerou-se uma amostra de 120 alunos (75 % da população), selecionados acidentalmente, visando a disponibilidade, rapidez e o menor custo na recolha de dados. Concluiu-se que os alunos de enfermagem de uma forma geral apresentam conhecimentos sobre a RNCCI. Destacando-se uma percentagem de 90% de respostas corretas referentes sobre a RNCCI. No entanto 75% dos alunos responderam erradamente às afirmações relacionados com o processo de referenciação e tipologia das respostas da RNCCI. Comparando estes resultados com estudos realizados com enfermeiros que exercem funções na RNCCI, verifica-se que os alunos não apresentam conhecimentos suficientes para desencadear funções ou processos relacionados com a RNCCI, apesar de terem conhecimentos gerais da mesma, pois apresentam consideráveis falhas desde logo no processo de referenciação, assim como profissionais que já trabalham na área. Tais factos constatados salientam a importância de formação teórica e/ou prática, no plano curricular da licenciatura de enfermagem, preparando os futuros enfermeiros para exercerem as suas funções na RNCCI, e não só. Pois os enfermeiros que trabalham nos cuidados de saúde primários e secundários, também eles necessitam de ter conhecimentos sobre a RNCCI, verificando-se muito frequentemente é durante o internamento que se inicia o processo de referenciação. Sugerindo que o conhecimento dos alunos sobre a RNCCI, são adquiridos na sua maioria durante a realização do ensino clínico, onde acompanham este tipo de atividades. Embora a formação base da licenciatura, permita uma vasta aquisição de competências teórico-práticas, e a integração de formação sobre a RNCCI, seja considerada pelos alunos de enfermagem, como importante ou muito importante, a mesma pode considerar-se atualmente praticamente inexistente.

Quantum interference effects in a cavity QED system

We consider the effect of quantum interference on population distribution and photon statistics of a cavity field interacting with dressed states of a strongly driven three-level atom. We analyse three coupling configurations of the cavity field to the driven atom, with the cavity frequency tuned to the outer Rabi sideband, the inner Rabi sideband and the central frequency of the 'singly dressed' three-level atom. The quantum doubly dressed states for each configuration are identified and the population distribution and photon statistics are interpreted in terms of transitions among these dressed states and their populations. We find that the population distribution depends strongly on quantum interference and the cavity damping. For the cavity field tuned to the outer or inner Rabi sidebands the cavity damping induces transitions between the dressed states which are forbidden for the ordinary spontaneous emission. Moreover, we find that in the case of the cavity field coupled to the inner Rabi sideband the population distribution is almost Poissonian with a large average number of photons that can be controlled by quantum interference. This system can be considered as a one-atom dressed-state laser with controlled intensity.

Fuel cells, hydrogen and energy supply in Australia

Australia is unique in terms of its geography, population distribution, and energy sources. It has an abundance of fossil fuel in the form of coal, natural gas, coal seam methane (CSM), oil, and a variety renewable energy sources that are under development. Unfortunately, most of the natural gas is located so far away from the main centres of population that it is more economic to ship the energy as LNG to neighboring countries. Electricity generation is the largest consumer of energy in Australia and accounts for around 50% of greenhouse gas emissions as 84% of electricity is produced from coal. Unless these emissions are curbed, there is a risk of increasing temperatures throughout the country and associated climatic instability. To address this, research is underway to develop coal gasification and processes for the capture and sequestration Of CO2. Alternative transport fuels such as biodiesel are being introduced to help reduce emissions from vehicles. The future role of hydrogen is being addressed in a national study commissioned this year by the federal government. Work at the University of Queensland is also addressing full-cycle analysis of hydrogen production, transport, storage, and utilization for both stationary and transport applications. There is a modest but growing amount of university research in fuel cells in Australia, and an increasing interest from industry. Ceramic Fuel Cells Ltd. (CFCL) has a leading position in planar solid oxide fuel cells (SOFCs) technology, which is being developed for a variety of applications, and next year Perth in Western Australia is hosting a trial of buses powered by proton-exchange fuel cells. (C) 2004 Elsevier B.V. All rights reserved.