Numerical modeling of surface runoff and erosion due to moving rainstorms at the drainage basin scale

A physically-based distributed erosion model (MEFIDIS) was applied to evaluate the consequences of storm movement on runoff and erosion from the Alenquer basin in Portugal. Controlled soil flume laboratory experiments were also used to test the model. Nine synthetic circular storms were used, combining three storm diameters (0.5, 1 and 2 times the Alenquer basin's axial length) with three speeds of storm movement (0.5, 1 and 2 m/s); storm intensities were synthesized in order to maintain a constant rainfall depth of 50 mm. The model was applied to storms moving downstream as well as upstream along the basin's axis. In all tests, downstream-moving storms caused significantly higher peak runoff (56.5%) and net erosion (9.1%) than did upstream-moving storms. The consequences for peak runoff were amplified as the storm intensity increased. The hydrograph shapes were also different: for downstream-moving storms, runoff started later and the rising limb was steeper, whereas for upstream moving storms, runoff started early and the rising limb was less steep. Both laboratory and model simulations on the Alenquer basin showed that the direction of storm movement, especially in case of extreme rainfall events, significantly affected runoff and soil loss.http://www.sciencedirect.com/science/article/B6V6C-4K7WTYF-3/1/05f00859098982a6ae43cfee9cc48fe

Composição de aminoácidos de cereal matinal de arroz e feijão.

O objetivo deste trabalho foi elaborar um cereal matinal extrudado de arroz e feijão e verificar a influência do processo de extrusão no perfil de aminoácidos do produto obtido. O extrudado foi formulado adicionando-se 30% de farinha de bandinha de feijão e 5% de açúcar refinado à farinha de quirera de arroz e processado em extrusora mono-rosca. As farinhas de quirera de arroz, bandinha de feijão e o cereal matinal obtido foram analisados quanto ao perfil de aminoácidos. De acordo com os resultados, verificou-se que para o cereal matinal de arroz e feijão, os aminoácidos sulfurados, a lisina e o triptofano foram limitantes, ou seja, a combinação de arroz e feijão, na proporção utilizada neste trabalho, não foi suficiente para atender as exigências mínimas requeridas para crianças de 1 a 3 anos. Em relação aos demais aminoácidos essenciais, o cereal matinal atingiu as necessidades requeridas para crianças, com destaque para os aminoácidos fenilalanina e tirosina

Recursos florestais não madeireiros: experiência e novos rumos em Rondônia.

Nesta publicação apresenta-se, de forma resumida, as principais pesquisas com Produtos Florestais Não Madeireiros (PFNM) realizadas pela Embrapa Rondônia e as novas tendências de aproveitamento da biodiversidade do Estado de Rondônia.bitstream/CPAF-RO-2010/14327/1/doc115-recursosflorestaisnaomadeireiros.pd

Deciphering M-T diagram of shape memory Heusler alloys: reentrance, plateau and beyond

We present our recent results on temperature behaviour of magnetization observed in Ni_47Mn_39In_14 Heusler alloys. Three regions can be distinguished in the M-T diagram: (I) low temperature martensitic phase (with the Curie temperature T_CM = 140 K), (II) intermediate mixed phase (with the critical temperature T_MS = 230 K) exhibiting a reentrant like behavior (between T_CM and T_MS) and (III) high temperature austenitic phase (with the Curie temperature T_CA = 320 K) exhibiting a rather wide plateau region (between T_MS and T_CA). By arguing that powerful structural transformations, causing drastic modifications of the domain structure in alloys, would also trigger strong fluctuations of the order parameters throughout the entire M-T diagram, we were able to successfully fit all the data by incorporating Gaussian fluctuations (both above and below the above three critical temperatures) into the Ginzburg-Landau scenario

On Matrix Superpotential and Three-Component Normal Modes

We consider the supersymmetric quantum mechanics (SUSY QM) with three- component normal modes for the Bogomol'nyi-Prasad-Sommerfield (BPS) states. An explicit form of the SUSY QM matrix superpotential is presented and the corresponding three-component bosonic zero-mode eigenfunction is investigated.Comment: 17 pages, no figure. Paper accepted for publication in Journal of Physics A: Mathematical and Theoretica

Acousto-optical multiple interference devices

We present a new concept for waveguide acousto-optical devices based on coupled MachZehnder interferometers driven by acoustic waves. These acousto-optical multiple interference devices use the periodic refractive index modulation induced by the acoustic wave to realize functionalities such as ON/OFF switching for an arbitrary time interval, as well as for efficient light modulation at high harmonics of the acoustic frequency and pulse shaping for, e.g., integrated Q-switches. We also discuss application of the concepts to light modulation by very high acoustic frequencies, where the acoustic wavelengths become much shorter than the optical ones