PySCIPOpt: Mathematical Programming in Python with the SCIP Optimization Suite

This is the author accepted manuscript. The final version is available frpm Springer Verlag via the DOI in this record5th International Congress on Mathematical Software (ICMS 2016), 11-14 July 2016, Berlin, GermanySCIP is a solver for a wide variety of mathematical optimization problems. It is written in C and extendable due to its plug-in based design. However, dealing with all C specifics when extending SCIP can be detrimental to development and testing of new ideas. This paper attempts to provide a remedy by introducing PySCIPOpt, a Python interface to SCIP that enables users to write new SCIP code entirely in Python. We demonstrate how to intuitively model mixed-integer linear and quadratic optimization problems and moreover provide examples on how new Python plug-ins can be added to SCIP.German Federal Ministry of Education and Researc

Technical and economic performance favours fully automated climate control broiler housing.

Abstract: 1. This study compared two broiler housing models with different technologies (conventional versus fully automated climate control) to verify their performance and carcass characteristics at slaughter, as well as the economics of production. 2. A database regarding 20 443 flocks of heavy broilers produced in an integrated operation during the years 2020 and 2021, in eight Brazilian regions was used in the analysis. The dependent variables included feed conversion, average live weight gain, total and partial carcass condemnation and the total mortality. For economic analysis, the production cost of each technology including feed, labour, energy, heating and depreciation was calculated. 3. The technology used in the broiler houses had a significant effect on the technical indicators which were positive for fully automated climate control in most geographical regions. One important exception was the effect on total and partial carcass condemnations, with better results seen for conventional housing. The total cost per ton of broiler meat delivered, deducting condemnation losses, was lower in the automated climate controlled housing compared to conventional housing. 4. In conclusion, there was a reduction in broiler chicken production costs for birds raised in fully automated climate controlled housing, indicating better economic results for this model in Brazil

Synergistic effect of fibres on the physical, mechanical, and microstructural properties of aerogel-based thermal insulating renders

There is an increasing demand for highly efficient thermal insulating materials in buildings. This study presents a novel solution incorporating nanomaterials, such as silica aerogel, which can achieve low thermal conductivity values (below 0.030 W m-1 K-1) in renders. A key challenge of using aerogels is their low mechanical strength and high capillary water absorption. Here we describe a novel approach employing fibres which mitigates against some key properties which are decreased as a consequence of using aerogel. The incorporation of aramid (0.50%), sisal (0.10%), and biomass (0.10%) fibres (by total volume) was evaluated experimentally in terms of physical, mechanical, and microstructural properties. A synergistic effect between the fibres and aerogel increased mechanical resistance and a reduction in the capillary water absorption, when compared to the reference render (without fibres), whilst maintaining the low thermal conductivity. However, these properties depended significantly on whether the fibres were synthetic or organic. This study is important as it demonstrates that aerogel-based fibre-enhanced thermal renders can contribute to higher energy efficiency in both new construction and retrofitting. The use of these materials will have a direct positive impact on addressing the climate crisis

Avaliação do comportamento humano nas organizações: uma proposta.

Referencial teórico; Proposta de instrumento de avaliação comportamental; Metodologia para operacionalização.bitstream/CNPTIA/11402/1/doc66.pdfAcesso em 28 maio 2007

Synergistic effect of fibres on the physical, mechanical, and microstructural properties of aerogel-based thermal insulating renders

There is an increasing demand for highly efficient thermal insulating materials in buildings. This study presents a novel solution incorporating nanomaterials, such as silica aerogel, which can achieve low thermal conductivity values (below 0.030 W m-1 K-1) in renders. A key challenge of using aerogels is their low mechanical strength and high capillary water absorption. Here we describe a novel approach employing fibres which mitigates against some key properties which are decreased as a consequence of using aerogel. The incorporation of aramid (0.50%), sisal (0.10%), and biomass (0.10%) fibres (by total volume) was evaluated experimentally in terms of physical, mechanical, and microstructural properties. A synergistic effect between the fibres and aerogel increased mechanical resistance and a reduction in the capillary water absorption, when compared to the reference render (without fibres), whilst maintaining the low thermal conductivity. However, these properties depended significantly on whether the fibres were synthetic or organic. This study is important as it demonstrates that aerogel-based fibre-enhanced thermal renders can contribute to higher energy efficiency in both new construction and retrofitting. The use of these materials will have a direct positive impact on addressing the climate crisis

Acompanhamento parasitário de rebanhos suínos no Sistema Intensivo de Suínos Criados ao Ar Livre - SISCAL.

bitstream/CNPSA/15616/1/cot253.pd

Administración de sulfato de cobre sobre la hemoquímica, hematología y bioactividad del líquido ruminal en vacas

El trabajo se realizó en unidades de producción pertenecientes a la Granja Pecuaria Santa Clara de la provincia de Villa Clara. Se estudiaron 150 hembras bovinas divididas en tres grupos de tratamientos, (A, B y C) de 50 animales cada uno El grupo A, control; el B, fue tratado con 2 ml (25 mg/ml) de un compuesto de sulfato de cobre (CuSO4) inyectado subcutáneamente (alopáticamente) y el grupo C, se trató con acupuntura utilizando 0.1 ml de dicho producto subcutáneamente en el punto PaHuai o Bahuai; los animales del grupo A, no recibieron ningún tratamiento. A los animales de los grupos tratados (B y C) se les repitió el tratamiento cada 60 días en dos aplicaciones más. Los análisis hematológicos y hemoquímicos se efectuaron en los laboratorios de la Facultad de Ciencias Agropecuarias de la Universidad Central de Las Villas. Los datos obtenidos fueron valorados mediante el paquete estadístico Statgraphics Plus 4.1. Las investigaciones hematológicas y hemoquímicas en los animales confirmaron la existencia de la carencia de cobre en los animales y la respuesta a la suplementación de los mismos ya que aumentaron significativamente (