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demographic and behavioral responses of the White-winged Dove to human disturbances during winter in northwestern Mexico

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Avian Research 2022年第4期13卷 437-444页

作者： Ruben Ortega-Alvarez Jovani Le on-Aguilar Antonio Isain Contreras-Rodríguez gustavo casta neda.de los santos Instituto de Investigaciones en Ecosistemas y Sustentabilidad(IIES)-Universidad Nacional Autonoma de Mexico Campus MoreliaAntigua Carretera a Patzcuaro 8711Col.San Jose de la HuertaMoreliaMichoacan58190Mexico Programa de Aves Urbanas(PAU) Los MochisSinaloaMexico Quirino Mendoza#320 Colonia del CarmenXochimilcoCiudad de Mexico16720Mexico departamento de Educacion Ambiental Jardín Bot anico Benjamin Francis JohnstonSinaloaMexico

The simultaneous study of demography and behavior might provide a more comprehensive understanding about animal responses to anthropogenic *** White-winged Dove(Zenaida asiatica)is a frequent dweller of urban and agricultural habitats in North America,Central America,and the ***,research on the species is heavily biased to the *** analyzed the response of the species to human disturbances during winter across an urban-agricultural landscape in northwestern Mexico through a demographic and behavioral *** modeled the effect of disturbance types(pedestrians,cars,pavement and building cover)on the density of the ***,we investigated if surveillance behavior varied across the landscape by estimating and comparing perching proportion among land uses(urban grey areas,urban green areas,cropfields,shrublands).We did not detect the species within cropfields,possibly because food resources were not available for the dove during winter in this land *** cover limited species’density,as it might reduce the surface of the preferred feeding substrates of the *** and building cover increased the density of the species,as they might provide food and shelter for the dove,*** behavior peaked in urban grey areas,whereas it dropped in urban green *** on threat levels,threat type,and protective cover among land uses might in-fluence such behavioral *** approach contributes to the knowledge of the species and demonstrates that both demographic and behavioral cues provide complementary evidence for analyzing the impact of human disturbances on animals.

关键词： Agriculture density Perch Sinaloa Urbanization Zenaida asiatica

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Analysis of Daily Rainfall in São Carlos/SP, Brazil over 1979-2017 Using Laplace Trend Test

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Journal of Geoscience and Environment Protection 2020年第7期8卷 104-125页

作者： Rafael Grecco Sanches Bruno César Dos santos Rodrigo Sanches Miani gustavo Zen de Figueiredo Neves Mauricio Sanches Duarte Silva Adriano Rogério Bruno Tech São Carlos School of Engineering Program in Environmental Engineering Sciences University of S&#227o Paulo (USP) Sao Car-los Sao Paulo Brazil School of Computer Science Federal University of Uberlandia (UFU) Uberlandia Minas Gerais Brazil department of Animal Science and Food Engineering University of Sao Paulo (USP) Sao Paulo Brazil

Rainfall expresses one of the most complex climate factors in Southeastern Brazil. Understanding the dynamics and temporal trends of rainfall represents a significant challenge due to regional and even global mechanisms, such as FS (Frontal Systems) and the SACZ (South Atlantic Convergence Zone), and the interaction with the Atlantic and Pacific Oceans. The present study aimed at analyzing the pluviometric tendencies in São Carlos/SP, in the countryside of São Paulo State. Laplace trend test was used to comprehend the temporal evolution of daily rainfall in the region in the historical series 1979-2017, in seven pluviometric stations (climatological or surface stations). Significant fluctuations in interannual trends and between seasons were observed. However, it was noted that the beginning of the 1980s showed positive trends, whereas, as of the year 2000, most of the stations demonstrated negative trends, indicating a reduction in daily rainfall volume due to the great tropical climatic variability of Brazil. Emphasis should also be given to the regional and local effects, such as elevation and urbanization, respectively, which corroborate such differences among the analyzed stations. This methodology is of considerable value for the observation of pluviometric trends, and future studies can validate such a tool in climatological studies.

关键词： Tropical Climatology Climate Variability Rainfall Trends Statistical Tool Laplace Trend Test

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Effect of Nanoparticles on Mechanical Properties of Cement-Sand Mortar Applications

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Advances in Chemical Engineering and Science 2017年第3期7卷 270-276页

作者： José Salvador Cavazos gustavo González Oxana V. Kharissova Beatriz Ortega Laura Pe&ntilde a Mario Osorio Mauricio Garza-casta&ntilde ón Universidad de Monterrey Physics and Mathematics Department Engineering and Technologies Division San Pedro Garza-García N.L.México Universidad Autónoma de Nuevo León Facultad de Ciencias Físico-Matemáticas Pedro de Alba S/N Ciudad Universitaria San Nicolás de los Garza N.L. Mexico

Cement-sand mortar is a construction material widely used;tile adhesive is one of the main applications where the compressive strength is the key performance metric. Nanoparticles like MWCNTs and HNTs are currently being used to improve the mechanical performance of the cement mortar due to their properties. The cost of MWCNTs has limited their application in the construction industry. This study focuses on the effect of two different concentrations of MWCNTs and HNTs in cement mortar;HNTs are proposed in this study to compare performance and cost overall benefits. A common problem with MWCNTs is agglomeration;to achieve a proper dispersion an ultrasonic processor was utilized. Mechanical properties of a cement mortar modified with nanoparticles were investigated with compression and bending tests on specimens performed at the age of 7 days. Results showed that concentrations of 0.1% of MWCNTs increase in compression strength by 56% and concentrations of 0.1% of HNTs performance increased by 31%, both compared to plain cement mortar.

关键词： Mechanical Properties Compressive Strength Cement Cement Manufacture

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Integration of a Didactic Manufacturing Cell with Different Robot Configurations

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Journal of Mechanics Engineering and Automation 2018年第3期8卷 118-126页

作者： Martin Eduardo Rodriguez-Franco santos Miguel Orozco-Soto Yadira Fabiola Loez-Alvarea Mechatronics Division Technological University of North Aguascalientes Rincdn de Romos Aguascalientes 20400 Mexico Advanced Technology Center CIATEQ Aguascalientes Aguascalientes Valley Industrial Park San Francisco de los Romo Aguascalientes 20358 Mexico Automatic Control department Center for Research and Advanced Studies of National Polytechnic Institute Zacatenco Unit Gustavo A. Madero Mexico City 07360 Mexico University Center of Lagos University of Guadalajara Lagos de Moreno Jalisco 47460 Mexico

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