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Siting Study of Solar Thermoelectric Plants in the State of Minas Gerais

Journal of Geographic Information System 2014年第5期6卷 423-439页

作者： Chigueru Tiba Ruibran Januario dos Reis Reis Julio Cesar Ezequiel da Costa Veronica Wilma Bezerra Azevedo joao francisco abreu Melina Amoni Silveira Alves Daniel Pereira Guimaraes Marco Aurelio Dumont Porto Nuclear Energy Department Federal University of PernambucoRecifeBrazil Programa de Pos-Graduacao em Geografia PUCBelo HorizonteBrazil Companhia Energetica de Minas Gerais Belo HorizonteBrazil Embrapa Milho e Sorgo Sete LagoasBrazil

The generation of heliothermal electricity has received increasing attention throughout the world in countries such as Spain, the USA, Germany and many others. In Brazil, this type of energy generation in the form of large projects (above 80 MW) remains unexplored. However, it is known that in the country, there are extensive areas of normal direct irradiation with high intensity and a low seasonality factor, especially in the semiarid regions in Brazil, mainly the North and Northeast of Minas Gerais. Moreover, these Minas Gerais regions have other significant characteristics for the installation of these plants: proximity to transmission lines, flatness, the fact that the respective vegetation is not endangered, a suitable land use profile (availability of land not used in agriculture), low wind speed, low population density, and, most recently, an increase in the demand for local electric energy due to the economic growth above the Brazilian average rate. Furthermore, the introduction of solar plants in that region, due to its distributed nature, will bring development and growth to the region (normally poor) by generating employment and income. This article presents a study of the optimal location of thermoelectric plants in the semiarid regions of Minas Gerais, conducted with Geographical Information System (GIS) technology. GIS consists of a set of specialised resources that allow the manipulation of spatial data, bringing efficiency and agility in the identification of suitable places for the installation of solar plants, while simultaneously enabling the consideration of future scenarios for energy planning, with its respective impact, costs and benefits. The study has identified very promising solar irradiation levels for the electric generation by solar energy, whether thermoelectric or photovoltaic, reaching an annual solar irradiation of 2700 kWh/m2 in the summer and in the range of 2200 - 2400 kWh/m2 on an annual basis. This area includes a vast region i

关键词： Solar Energy Thermoelectric Solar Plant Geographical Information System Promising Regions in the Minas Gerais

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What is the effect of Tribulus terrestris on testicular morphology and sperm production?An experimental study in the rat model

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Asian Journal of Andrology 2024年第1期26卷 67-70页

作者： Marcello Henrique Araujo Da Silva Gabriela Faria Buys-Goncalves joao Henrique Duque Reis Estrada francisco Jose Barcellos Sampaio Diogo Benchimol de Souza Urogenital Research Unit Rio de Janeiro State UniversityRio de Janeiro 20551-030RJBrazil

The objective of this study was to investigate whether treatment with Tribulus terrestris(Tt)has any impact on the testicular morphology and function in a rodent *** male rats were divided into a control group and a group receiving 100 mg kg^(-1) body weight of Tt *** 4o days of experiment,the animals were submitted to euthanasia;epididymal tail spermatozoa were collected;and spermatozoa concentration,motility,and viability were *** addition,testicles were collected and processed for histomorphometrical *** were compared using the Student's t-test and considered significant when P<*** concentration,motility,and viability showed no difference between the ***,testicular weight and volume,seminiferous tubule diameter,tunica propria surface density,seminiferous epithelium surface density,and intertubular compartment surface density were statistically similar between the ***,seminiferous epithelium height and tubular lumen surface density were augmented in animals treated with *** with Tt does not cause a major impact on testicular morphology,promoting only subtle *** difference on spermatozoa parameters was observed.

关键词： morphometry testicle Tribulus terrestris

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Analysing vaccine efficacy evaluated in phase 3 clinical trials carried out during outbreaks

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Infectious Disease Modelling 2024年第4期9卷 1027-1044页

作者： francisco Antonio Bezerra Coutinho Marcos Amaku Fernanda Castro Boulos Jose Alfredo de Sousa Moreira joao Italo DiasFranca Julio Antonio do Amaral Eliana Nogueira Castro de Barros Claudio Jose Struchiner Esper Jorge Kallas Eduardo Massad School of Medicine University of Sao PauloBrazil Instituto Butantan Sao PauloBrazil School of Applied Mathematics Fundacao Getulio VargasRio de JaneiroBrazil

In this paper we examine several definitions of vaccine efficacy(VE)that we found in the literature,for diseases that express themselves in outbreaks,that is,when the force of infection grows in time,reaches a maximum and then *** fact that the disease occurs in outbreaks results in several problems that we *** propose a mathematical model that allows the calculation of VE for several *** trials usually needs a large number of volunteers that must be ***,all volunteers should be enrolled in approximately the same time,but this is generally impossible for logistic reasons and they are enrolled in a fashion that can be replaced by a continuous density function(for example,a Gaussian function).The outbreak can also be replaced by a continuous density function,and the use of these density functions simplifies the ***,for example Gaussian functions,one of the problems one can immediately notice is that the peak of the two curves do not occur at the same *** model allows us to conclude:First,the calculated vaccine efficacy decreases when the force of infection increases;Second,the calculated vaccine efficacy decreases when the gap between the peak in the force of infection and the peak in the enrollment rate increases;Third,different trial protocols can be simulated with this model;different vaccine efficacy definitions can be calculated and in our simulations,all result are approximately the *** final,and perhaps most important conclusion of our model,is that vaccine efficacy calculated during outbreaks must be carefully examined and the best way we can suggest to overcome this problem is to stratify the enrolled volunteer's in a cohort-by-cohort basis and do the survival analysis for each cohort,or apply the Cox proportional hazards model for each cohort.

关键词： Vaccine efficacy Clinical trials Mathematical models Simulations Covid-19

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小型水坝安全管理现状(英文)

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岩土工程学报 2008年第11期30卷 1713-1721页

作者： joao francisco Alves Silveira Technical Director SBB Engenharia Ltda 1265 Miguel Petroni St - Sao Carlos S.P. Brazil

提出了关于小型水坝安全管理的一些见解,并尝试区分小坝与大坝之间的主要特征。小型水坝的安全管理包括一些政策、程序和现场监测,目的在于将水坝风险最小化。有关设计标准、材料参数和小坝降等原始资料的仔细检查,小坝巡视检查表,水坝... 详细信息

提出了关于小型水坝安全管理的一些见解,并尝试区分小坝与大坝之间的主要特征。小型水坝的安全管理包括一些政策、程序和现场监测,目的在于将水坝风险最小化。有关设计标准、材料参数和小坝降等原始资料的仔细检查,小坝巡视检查表,水坝监测指导性文件和对小型坝按安全进行分级都是本文阐述的主要内容。

关键词：安全监测巡视检查小型水坝

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Investigation of Galactic open cluster remnants： the case of NGC 7193

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Research in Astronomy and Astrophysics 2017年第1期17卷 31-54页

作者： Mateus de Souza Angelo joao francisco Coelho dos Santos Jr Wagner Jose Barbosa Corradi francisco Ferreira de Souza Maia Andres Eduardo Piatti Departamento de Fisica ICEx Universidade Federal de Minas Gerais Av. Antonio Carlos 6627 31270-901 Belo Horizonte MG Brazil Observatorio Astronomico Universidad Nacional de Cordoba Laprida 854 5000 Cordoba Argentina Consejo Nacional de Investigaciones Cientificas y Tecnicas Av. Rivadavia 1917 C1033AAJ Buenos AiresArgentina

Galactic open clusters （OCs） that survive the early gas-expulsion phase are gradually de- stroyed over time by the action of disruptive dynamical processes. Their final evolutionary stages are characterized by a poorly populated concentration of stars called an open cluster remnant （OCR）. This study is devoted to assessing the real physical nature of the OCR candidate NGC 7193. GMOS/Gemini spectroscopy of 53 stars in the inner target region were obtained to derive radial velocities and at- mospheric parameters. We also employed photometric and proper motion data. The analysis method consists of the following steps：（i） analysis of the statistical resemblance between the cluster and a set of field samples with respect to the sequences defined in color-magnitude diagrams （CMDs）; （ii） a 5-dimensional iterative exclusion routine was employed to identify outliers from kinematical and posi- tional data; （iii） isochrone fitting to thes× （J - Ks） CMD of the remaining stars and the dispersion of spectral types along empirical sequences in the （J - H） × （H - Ks） diagram were checked. A group of stars was identified for which the mean heliocentric distance is compatible with that obtained via isochrone fitting and whose metallicities are compatible with each other. Fifteen of the member stars observed spectroscopically were identified together with another 19 probable members. Our results indi- cate that NGC 7193 is a genuine OCR, of a once very populous OC, for which the following parameters were derived： d = 501±46 pc, t = 2.5±1.2 Gyr, （[Fe/H]） = -0.17±0.23 and E（B-V） = 0.05±0.05. Its luminosity and mass functions show depletion of low mass stars, confirming the OCR is in a dynam- ically evolved state.

关键词： open cluster remnants - Galactic open clusters

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A measure of ionospheric irregularities:zonal velocity and its implications for L-band scintillation at low-latitudes

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Earth and Planetary Physics 2021年第5期5卷 450-461页

作者： Claudio Cesaroni Luca Spogli Giorgiana De Franceschi Juliana Garrido Damaceno Marcin Grzesiak Bruno Vani joao francisco Galera Monico Vincenzo Romano Lucilla Alfonsi Massimo Cafaro Istituto Nazionale di Geofisica e Vulcanologia Italy SpacEarth Technology Italy Space Research Centre of the Polish Academy of Sciences Poland Instituto Federal de Educação Ciência e Tecnologia de São PauloBrazil Universidade Estadual Paulista“Júlio de Mesquita Filho” Brazil University of Salento Italy

We estimate the zonal drift velocity of small-scale ionospheric irregularities at low latitude by leveraging the spaced-receivers technique applied to two GNSS receivers for scintillation monitoring installed along the magnetic parallel passing in Presidente Prudente(Brazil,magnetic latitude 12.8°S).The investigated ionospheric sector is ideal to study small-scale irregularities,being located close to the expected position of the southern crest of the equatorial ionospheric *** measurement campaign took place between September 2013 and February 2014,*** and summer solstice seasons under solar maximum,during which the probability of formation of small-scale irregularities is expected to *** found that the hourly average of the velocity increases up to 135 m/s right after the local sunset at ionospheric altitudes and then smoothly decreases in the next *** measurements are in agreement with independent estimations of the velocity made by the Incoherent Scatter Radar located at the Jicamarca Radio Observatory(magnetic latitude 0.1°N),by the Boa Vista Ionosonde(magnetic latitude 12.0°N),and by applying a recently-developed empirical regional short-term forecasting ***,we investigated the relationship with the percentage occurrence of amplitude scintillation;we report that it is exponentially dependent on the zonal velocity of the irregularities that cause it.

关键词： ionospheric irregularities GNSS scintillation plasma drift velocity low-latitude ionosphere spaced receivers Equatorial Plasma Bubbles

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Increasing analyzable steel thickness for thin layer activation experiments

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Nuclear Science and Techniques 2020年第3期31卷 35-44页

作者： joao francisco de Oliveira Antunes Mauro Lucio Borges Lemos Michel de Almeida Franca Julio Cezar Suita Celso Marcelo Franklin Lapa Instituto de Engenharia Nuclear Rio de Janeiro 21941-614Brazil Programa de Engenharia Nuclear-COPPE/UFRJ Riode Janeiro 21941-450Brazil

The thin layer activation technique(TLA)is very effective in wear analysis for tribological systems where disassembly is costly or *** its development in the 1970s,TLA has been applied through direct irradiation of solid targets using ionizing particle beams to obtain an activation with a specific *** profile is then used to measure wear in a variety of *** experiments rely heavily on how deep the normalized activation *** of 30μm to 50μm are obtained for constant activation by the standard method,which for many experiments is ***,many others would benefit greatly from a 300μm constant activation layer,such as high-performance engines,softer alloys(brakes),and oil transport *** this aim was the goal of this ***,we needed to find an adequate irradiation line for the TLA ***,another technique/system was developed(the Attenuation Wheel),which would bring the depth of constant activation from 50μm to 300μm.

关键词： Thin layer activation Wear Proton beam Attenuation wheel

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Leaf Gas Exchange,Photon Capture and Light Harvest in Aldina heterophylla along a Vegetation Gradient in the Amazon Rainforest

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American Journal of Plant Sciences 2014年第10期5卷 1477-1488页

作者： joao Victor Figueiredo Cardoso Rodrigues José francisco de Carvalho Goncalves Federal University of Amazonas Center for Distance EducationManausBrazil Laboratory of Plant Physiology and Biochemistry National Institute for Research in the AmazonManausBrazil

Adaptation along environmental gradients is presumed to induce physiological and biochemical leaf changes in plant species. In this paper, we report how leaf gas exchange, photon capture and light harvest for photosynthesis in Aldina heterophylla change along a vegetation gradient from low stature open vegetation on extremely nutrient-poor white sand (Campina, CP), through inter-mediate closet type (Campinarana, CR) to tall closed rain forest (RF). The pigment concentrations did not differ between the CP, CR and RF habitats. The performance index for the photosynthesis (PIABS) of individuals in RF and CP was approximately 30% higher than that in CR individuals. This species showed similar potential rates of photosynthesis in the different vegetation types;however, the dark respiration rates were higher in CP. Our results indicate that the differences in the leaves and soil nitrogen concentrations are not enough to change the levels of gas exchange. Other environmental features may be driving the observed morphological features in this gradient, in particular, the tree height.

关键词： Chloroplast Pigments Dark Respiration Net Photosynthesis Physiological Plasticity Tropical Forest Biomass Accumulation

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Intellectual capital and value creation in the production and assembly of vehicles and auto-parts sector in Brazil： A panel data analysis

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Journal of Modern Accounting and Auditing 2010年第8期6卷 15-25页

作者： Leonardo Fernando Cruz Basso Herbert Kimura joao francisco de Aguiar Mackenzie Presbyterian University S6o Paulo 01302-907 Brasil

This work investigates the relationship between intellectual capital and value creation in the sector of production and assembly of vehicles and auto-parts in Brazil. Through the access of the database from the annual industrial research conducted by the Brazilian Institute of Geography and Statistics, we gathered 865 observations, from 2000 to 2006, of public and private Brazilian companies with more than 100 employees. The database allows the estimate of relevant aggregated variables such as national accounts, gross domestic product, intermediate consumption, as well as propitiates a sectorial study of business strategies and performance, including value added by individual companies. In particular, in this study we use data on variables associated to intellectual capital. To achieve the goal of the study, we consider intellectual capital as defined by Pulic （2000, 2002）, including human capital and structural capital. For the analysis of business performance, we used Pulic＇s VAIC （Value Added Intellectual Cofficient） index as a measure of efficiency of the employed financial and intellectual capital. Regression models were run to verify the relationship among the efficiency in the use of intellectual capital and the profitability of Brazilian companies. The gross income, calculated as before selling, general and administrative expenses, depreciation expenses, amortization and interest expenses, was used as measure of the flows of value creation and the profitability was measured by the gross income to the total assets of the companies. Considering the constructs defined by Pulic （2000, 2002）, we tested, for the Brazilian sector of Production and Assembly of Vehicles and Auto-parts, the following hypotheses：（l） there is a positive relationship between value creation and intellectual capital, （2） there is a positive relationship between value creation and stock of intellectual capital, （3） there is a positive relationship between value creation and efficiency of t

关键词： intellectual capital value creation panel data analysis production and assembly of vehicles andauto-parts sector in Brazil

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Bioengineered exosomal-membrane-camouflaged abiotic nanocarriers: neurodegenerative diseases, tissue engineering and regenerative medicine

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Military Medical Research 2023年第5期10卷 699-725页

作者： Daniela Lopes Joana Lopes Miguel Pereira-Silva Diana Peixoto Navid Rabiee francisco Veiga Omid Moradi Zhan-Hu Guo Xiang-Dong Wang joao Conde Pooyan Makvandi Ana Claudia Paiva-Santos Department of Pharmaceutical Technology Faculty of Pharmacy of the University of CoimbraUniversity of Coimbra3000-548 CoimbraPortugal REQUIMTE/LAQV Group of Pharmaceutical TechnologyFaculty of Pharmacy of the University of CoimbraUniversity of Coimbra3000-548 CoimbraPortugal School of Engineering Macquarie UniversitySydneyNsW 2109Australia Centre for Molecular Medicine and Innovative Therapeutics Murdoch UniversityPerthWA 6150Australia Department of Chemistry Shahr-e-Qods BranchIslamic Azad UniversityTehran 374-37515Iran lntegrated Composites Laboratory(iCL) Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon Tyne NE18STUK Department of Pulmonary and Critical Care Medicine Zhongshan HospitalFudan University Shanghai Medical CollegeShanghai 200032China Faculdade de Ciencias Medicas NOVA Medical SchoolUniversidade Nova de Lisboa1169-056 LisbonPortugal Centre for Toxicogenomics and Human Health GeneticsOncology and Human ToxicologyFaculdade de Ciencias MedicasNOVA Medical SchoolUniversidade Nova de Lisboa1169-056 LisbonPortugal school of Engineering Institute for Bioengineeringthe University of EdinburghEdinburgh EH93JLUK.

A bio-inspired strategy has recently been developed for camouflaging nanocarriers with biomembranes,such as natural cell membranes or subcellular structure-derived *** strategy endows cloaked nanomaterials with improved interfacial properties,superior cell targeting,immune evasion potential,and prolonged duration of systemic ***,we summarize recent advances in the production and application of exosomal membrane-coated *** structure,properties,and manner in which exosomes communicate with cells are first *** is followed by a discussion of the types of exosomes and their fabrication *** then discuss the applications of biomimetic exosomes and membrane-cloaked nanocarriers in tissue engineering,regenerative medicine,imaging,and the treatment of neurodegenerative ***,we appraise the current challenges associated with the clinical translation of biomimetic exosomal membrane-surface-engineered nanovehicles and evaluate the future of this technology.

关键词： Biomimetic Cell membrane coating Exosome Exosomal-membrane-coated nanoparticle Extracellular vesicle(EV)

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