13 research outputs found
Design of a highly-birefringent microstructured photonic crystal fiber for pressure monitoring
We present the design of an air hole microstructured photonic crystal fiber for pressure sensing applications. The air-hole photonic crystal lattices were designed to produce a large intrinsic birefringence of 1.16x10-3. The impact of the surrounding air holes for pressure sensing to the propagation mode profiles and indices were studied and improved, which ensures single mode propagation in the fiber core defined by the photonic crystal lattice. An air hole matrix and a practical chemical etching process during the fiber perform preparation stage is proposed to produce an optical fiber with a birefringence-pressure coefficient of 43.89×10-6MPa-1 or a fiber Bragg grating pressure responsivity of 44.15 pm/MPa, which is a 17 times improvement over previous photonic crystal fiber designs. © 2010 Optical Society of America
Genetic diversity of the pampas deer (Ozotoceros bezoarticus) population in the Brazilian Pantanal assessed by combining fresh fecal DNA analysis and a set of heterologous microsatellite loci
The Wide-field Spectroscopic Telescope (WST) Science White Paper
The Wide-field Spectroscopic Telescope (WST) is proposed as a new facility dedicated to the efficient delivery of spectroscopic surveys. This white paper summarises the initial concept as well as the corresponding science cases. WST will feature simultaneous operation of a large field-of-view (3 sq. degree), a high multiplex (20,000) multi-object spectrograph (MOS) and a giant 3x3 sq. arcmin integral field spectrograph (IFS). In scientific capability these requirements place WST far ahead of existing and planned facilities. Given the current investment in deep imaging surveys and noting the diagnostic power of
spectroscopy, WST will fill a crucial gap in astronomical capability and work synergistically with future ground and space-based facilities. This white paper shows that WST can address outstanding scientific questions in the areas of cosmology; galaxy assembly, evolution, and enrichment, including our own Milky Way; origin of stars and planets; time domain and multi-messenger astrophysics. WST's uniquely rich dataset will deliver unforeseen discoveries in many of these areas. The WST Science Team (already including more than 500 scientists worldwide) is open to the all astronomical community. To register in the WST Science Team please visit https://www.wstelescope.com/for-scientists/participat
Finite difference analysis of acoustic reflection and radiation from fluid-loaded plates
Fatores associados ao atraso no desenvolvimento em crianças, Rio Grande, Rio Grande do Sul, Brasil Factores asociados con retraso en el desarrollo de los niños, Rio Grande, Rio Grande do Sul, Brasil Factors associated with delay in development in children, Rio Grande, Rio Grande do Sul, Brazil
Estudo analĂtico com o objetivo de avaliar os fatores associados ao atraso no desenvolvimento em crianças entre 8 a 12 meses de idade indicadas como de risco ao nascer no municĂpio do Rio Grande, Rio Grande do Sul, Brasil. Foram utilizados como instrumentos o Teste de Triagem de Desenvolvimento de Denver II (TTDD II), a avaliação antropomĂ©trica e questionários estruturados. Participaram 220 crianças consideradas de risco ou nĂŁo ao nascer. Foi encontrada uma prevalĂŞncia de 20,5% de suspeita de atraso no desenvolvimento neuropsicomotor. As crianças que apresentaram risco de um TTDD II suspeito faziam parte de famĂlias de mais baixa renda; eram filhos de mĂŁes que haviam realizado menos de seis consultas de prĂ©-natal e apresentavam Ăndice peso-idade inadequado. Os dados sugerem a necessidade de um replanejamento das polĂticas de saĂşde infantil, visto que outros critĂ©rios poderiam ser incluĂdos nas condições de risco para a criança ao nascer.<br>Estudio analĂtico con el objetivo de evaluar los factores asociados al atraso en el desarrollo en niños de 8 a 12 meses de edad indicados como riesgo al nacer en el municipio de Rio Grande, RS, Brasil. Fueron utilizadas como herramientas la Prueba de Tamizaje del Desarrollo de Denver II, la evaluaciĂłn antropomĂ©trica y cuestionarios estructurados. Participaron 220 niños considerados de riesgo o no al nacer. Fue encontrada una prevalencia del 20,5% de sospecha de atraso en el desarrollo neuropsicomotor. Los niños que presentaron riesgo de un DDST II sospechoso formaban parte de familias de más baja renta; eran hijos de madres que habĂan realizado menos de seis consultas de prenatal y presentaban Ăndice peso-edad inadecuado. Los datos sugieren la necesidad de un replanteamiento de las polĂticas de salud infantil, asĂ como otros criterios podrĂan ser inclusos en las condiciones de riesgo para el niño al nacer.<br>This analytical study aims to evaluate the factors associated to developmental delay in 8-12 months aged children, indicated as at risk at birth in Rio Grande, Rio Grande do Sul, Brazil. The instruments used were the Denver Development Screening Test II, anthropometric evaluation and questionnaires. Participated 220 children considered or not at risk at birth. A prevalence of 20.5% of potential delay in psychomotor development was found. Children who presented a risk of a suspicious DDST II were part of lower income families, were children of mothers who had gone to fewer than six prenatal visits and had inappropriate weight-age indicator. The data suggest the need of a rethinking of policies on child health, given that other criteria could be included in the risk conditions to the child at birth