Avaliação de dados de radiação solar na escala diária modelada a partir de sensor remoto orbital para o Brasil.

Nesse trabalho, avaliou-se um método do qual se obtém dados estimados de radiação solar diária, derivados de satélites por banco de dados do Nasa-Power, já utilizado nos Estados Unidos, Argentina e Austrália, e que vem apresentando resultados satisfatórios quando comparados com os dados observados das estações automáticas

Modeling the optical/UV polarization while flying around the tilted outflows of NGC 1068

Recent modeling of multi-waveband spectroscopic and maser observations suggests that the ionized outflows in the nuclear region of the archetypal Seyfert-2 galaxy NGC 1068 are inclined with respect to the vertical axis of the obscuring torus. Based on this suggestion, we build a complex reprocessing model of NGC 1068 for the optical/UV band. We apply the radiative transfer code STOKES to compute polarization spectra and images. The effects of electron and dust scattering and the radiative coupling occurring in the inner regions of the multi-component object are taken into account and evaluated at different polar and azimuthal viewing angles. The observed type-1/type-2 polarization dichotomy of active galactic nuclei is reproduced. At the assumed observer's inclination toward NGC 1068, the polarization is dominated by scattering in the polar outflows and therefore it indicates their tilting angle with respect to the torus axis. While a detailed analysis of our model results is still in progress, we briefly discuss how they relate to existing polarization observations of NGC 1068.Comment: To appear in the proceedings of the meeting "The Central Kiloparsec in Galactic Nuclei" held in Bad Honnef (Germany) from August 29th to September 2nd 201

Subcentimeter depth resolution using a single-photon counting time-of-flight laser ranging system at 1550 nm wavelength

We demonstrate subcentimeter depth profiling at a stand off distance of 330m using a time-of-flight approach based on time-correlated single-photon counting. For the first time to our knowledge, the photon-counting time-of-flight technique was demonstrated at a wavelength of 1550nm using a superconducting nanowire single-photon detector. The performance achieved suggests that a system using superconducting detectors has the potential for low-light-level and eye-safe operation. The system’s instrumental response was 70ps full width at half-maximum, which meant that 1cm surface-to-surface resolution could be achieved by locating the centroids of each return signal. A depth resolution of 4mm was achieved by employing an optimized signal-processing algorithm based on a reversible jump Markov chain Monte Carlo method

Modeling a Microstretch Thermoelastic Body with Two Temperatures

We consider a theory of thermoelasticity constructed by taking into account the heat conduction in deformable bodies which depends on two temperatures. The first one is the conductive temperature, the second is the thermodynamic temperature, and the difference between them is proportional to the heat supply

Parametrização do modelo CANEGRO para as cultivares brasileiras de cana-de-açúcar.

O objetivo do presente trabalho foi a parametrização do modelo CANEGRO para a as cultivares brasileiras IAC 91-1099 e SP 89 1115.Trabalho apresentado na V Mostra de Trabalhos de Estagiários e Bolsistas, Campinas, out. 2009

Desarrollo e implementación de un sistema de seguridad de bajo costo

One of the main security problems in Colombia is home burglary since most of the time these are left alone during working hours or other types of occupations. This article presents an analysis of the problem of home security due to theft, looking for an effective solution at a lower cost than those available in the market. This arises from the analysis of the figures given by the DANE and a solution is proposed using the ESP32 development board, the HC-SR501 motion sensor, and the RC522 RFID (Radio Frequency Identification) reader, which allows us to generate an economical and reliable security system with the implementation of the IoT (Internet of Things) to make it more versatile.Una de las principales problemáticas de la seguridad en Colombia es el hurto a viviendas, dado que en la mayoría del tiempo estas quedan solas durante los horarios laborales u otros tipos de ocupaciones. En este artículo se presenta un análisis a la problemática de seguridad en las viviendas por hurtos, buscando una solución efectiva y con un costo menor a los que hay en el mercado. Este surge del análisis realizado a las cifras dadas por el DANE y se propone una solución haciendo uso de la placa de desarrollo ESP32, el sensor de movimiento HC-SR501 y el lector RFID (Identificación por radiofrecuencias) RC522lo que nos permite generar un sistema de seguridad económico, fiable y con implementación de las IoT (Internet de las cosas) para que sea más versátil

Cenários futuros para cana-de-açucar no Estado de São Paulo.

Com a atual contribuição econômica e tecnológica alcançada pelo setor canavieiro no Brasil é de altíssima importância a preocupação sobre os cenários futuros na agricultura e avaliação do impacto gerado pelas mudanças climáticas. Sobre a vulnerabilidade dos sistemas agrícolas, conseqüentemente, torna se de grande utilidade para o planejamento de médio e longo prazo do setor no País, adaptando-se aos possíveis impactos e observando as diferenças regionais quanto aos efeitos da mudança no clima. Portanto a necessidade de estudos com modelagem e análise de dados visando à avaliação dos possíveis impactos das mudanças climáticas sobre atividades humanas, recursos naturais e, particularmente, sobre a agricultura brasileira contém enormes valores econômicos e sociais com grande potencial de impacto no desenvolvimento nacional.Trabalho apresentado na V Mostra de Trabalhos de Estagiários e Bolsistas, Campinas, out. 2009

Efeito das mudanças climáticas para cana-de-açúcar com base no modelo APSIM/Sugarcane.

O objetivo deste trabalho foi avaliar a sensibilidade do modelo Agricultural production simulator - sugarcane (APSIM/Sugarcane) (Keating et al. 1998; Thorburn et al., 2005) quanto aos parâmetros climáticos [CO2], temperatura e precipitação, e analisar cenários futuros de mudança climática para a cultura de cana-de-açúcar

Discovery of Blue Hook Stars in the Massive Globular Cluster M54

We present BV photometry centered on the globular cluster M54 (NGC 6715). The color-magnitude diagram clearly shows a blue horizontal branch extending anomalously beyond the zero age horizontal branch theoretical models. These kinds of horizontal branch stars (also called ``blue hook'' stars), which go beyond the lower limit of the envelope mass of canonical horizontal branch hot stars, have so far been known to exist in only a few globular clusters: NGC 2808, Omega Centauri (NGC 5139), NGC 6273, and NGC 6388. Those clusters, like M54, are among the most luminous in our Galaxy, indicating a possible correlation between the existence of these types of horizontal branch stars and the total mass of the cluster. A gap in the observed horizontal branch of M54 around T(eff)= 27000 K could be interpreted within the late helium flash theoretical scenario, a possible explanation for the origin of those stars.Comment: 10 pages, 2 figures, accepted for publication in the Astrophysical Journa

White noise flashing Brownian pump

A Brownian pump of particles powered by a stochastic flashing ratchet mechanism is studied. The pumping device is embedded in a finite region and bounded by particle reservoirs. In the steady state, we exactly calculate the spatial density profile, the concentration ratio between both reservoirs and the particle flux. A simple numerical scheme is presented allowing for the consistent evaluation of all such observable quantities