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| Registros recuperados: 341 | |
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| Romero Romano, Carlos Osvaldo. |
| Actualmente el uso excesivo de fertilizantes sintéticos en la producción agrícola y el mal uso de estiércoles generados en las actividades pecuarias, ha generado una serie de problemas ambientales en todo el mundo, ejemplo de esto es la contaminación de las aguas superficiales y subterráneas por efecto de elementos como nitrógeno, en forma de nitrato, y fósforo, como fosfato, a la vez que cationes como potasio (K+), magnesio (Mg++), etc. Por otro lado, el uso excesivo de fertilizantes genera el empobrecimiento de los suelos agrícolas; debido a la pérdida de materia orgánica y la biota del suelo. Con base a esta problemática, en este trabajo se presentan tres investigaciones; que pueden resultar como alternativas para la reducción del uso de fertilizantes... |
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Palavras-chave: Alternativas; Contaminación; Medio ambiente; Alternatives; Environment; Pollution; EDAR; Estrategias para el Desarrollo Agrícola Regiona; Maestría. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/647 |
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| Griggs, David; Monash Sustainability Institute, Monash University; dave.griggs@monash.edu; Stafford Smith, Mark; CSIRO Climate Adaptation Flagship; mark.staffordsmith@csiro.au; Gaffney, Owen; International Geosphere-Biosphere Programme; owen.gaffney@igbp.kva.se; Glaser, Gisbert; International Council for Science; gisbert.glaser@icsu.org; Kanie, Norichika; Tokyo Institute of Technology; United Nations University Institute of Advanced Studies; kanie@valdes.titech.ac.jp; Noble, Ian; Notre Dame Global Adaptation Index; Monash Sustainability Institute, Monash University; iannoble@me.com; Steffen, Will; Fenner School of Environment and Society, Australian National University; Stockholm Resilience Centre, Stockholm University; will.steffen@anu.edu.au; Shyamsundar, Priya; South Asian Network for Development and Environmental Economics; priyas@sandeeonline.org. |
| The United Nations (UN) Rio+20 summit committed nations to develop a set of universal sustainable development goals (SDGs) to build on the millennium development goals (MDGs) set to expire in 2015. Research now indicates that humanity’s impact on Earth’s life support system is so great that further global environmental change risks undermining long-term prosperity and poverty eradication goals. Socioeconomic development and global sustainability are often posed as being in conflict because of trade-offs between a growing world population, as well as higher standards of living, and managing the effects of production and consumption on the global environment. We have established a framework for an evidence-based architecture for new goals... |
| Tipo: Peer-Reviewed Insight |
Palavras-chave: Development; Environment; Sustainability; Sustainable development; Sustainable development goals. |
| Ano: 2014 |
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| Jacobson, Susan K.; Department of Wildlife Ecology and Conservation, University of Florida; jacobson@ufl.edu; Seavey, Jennifer R; Shoals Marine Laboratory; School of Marine Science and Ocean Engineering, University of New Hampshire; College of Agriculture and Life Science, Cornell University; jennifer.seavey@unh.edu; Mueller, Robert C; School of Art and Art History, University of Florida; bmueller@ufl.edu. |
| An interdisciplinary field trip to a remote marine lab joined graduate students from fine arts and natural resource science departments to think creatively about the topic of climate change and science communication. We followed a learning cycle framework to allow the students to explore marine ecosystems and participate in scientific lectures, group discussions, and an artist-led project making abstract collages representing climate change processes. Students subsequently worked in small groups to develop environmental communication material for public visitors. We assessed the learning activity and the communication product using pre- and post-field trip participant surveys, focus group discussions, and critiques by art and communication experts of the... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Collage; Creativity; Education; Environment; Field trip; Interpretation; Peer learning; Survey. |
| Ano: 2016 |
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| Casagrandi, Renato; Dipartimento di Elettronica e Informazione, Politecnico di Milano; casagran@elet.polimi.it; Rinaldi, Sergio; CIRITA, Politecnico di Milano; rinaldi@elet.polimi.it. |
| This paper shows that it is difficult, if not impossible, to formulate policies that guarantee that tourism can be maintained for a long time without severely impacting on the environment. The analysis is purely theoretical and is based on very simple and general assumptions about the interactions between the three main components of the system: the tourists, the environment, and the capital. These assumptions are encapsulated in a so-called minimal model, used to predict the economic and environmental impact of any given policy. This paper is of value for three reasons. First, it introduces the approach of minimal descriptive models in the context of tourism, which has traditionally been dominated by the use of black-box econometric models. Second, the... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Bifurcation analysis; Environment; Model; Nonlinear dynamics; Sustainability; Tourism. |
| Ano: 2002 |
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| Machado,Renata F; Cerezer,Felipe O; Hendges,Carla D; Cáceres,Nilton C. |
| We evaluated several factors that might be related to the home-range size of felids at both inter and intraspecific levels. At the interspecific level, we tested the influence of body mass on home range size of 19 felid species, while controlling for phylogeny. At the species level, we evaluated the effect of sex and habitat type (open vs. closed) on the home range size of three species of felids occurring in America, Panthera onca, Leopardus pardalis and Puma concolor, which are among the most studied species concerning home ranges. Body mass, sex, and home range data were extracted from the Pantheria database (for 19 species, for interspecific comparisons) and from 48 studies for intraspecifc comparisons. We assessed the influence of body mass on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pantera onca; Leopardus pardalis; Puma concolor; Sexual dimorphism; Body size; Environment; Territory. |
| Ano: 2017 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2017000300004 |
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| Gonçalves,Indira C. M.; Turco,Sílvia H. N.; Leitão,Mário de M. Vilas Boas R.; Oliveira,Leane N.; Amorim,Danielle M.. |
| ABSTRACT The spatial variability in meteorological conditions was evaluated in two small ruminant house with different constructive aspects, based on the variables of dry bulb temperature, relative humidity, wind speed and temperature humidity index (THI), through the generation of maps using the Kriging interpolation method. The experiment was conducted in two seasons, winter and summer, and the small ruminant house were denominated as: FNRG (facility at ground level with no ridge vent) and FWRG (facility at ground level and with ridge vent). The studied parameters were recorded by portable digital sensors, thermo-anemometers and thermo-hygrometers, with data collections at 9 am and 3 pm. With the analysis of the spatial variability of the data, it was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environment; Animal production; Welfare. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000300300 |
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| Furtado,Dermeval A.; Peixoto,Adriana P.; Nascimento,José W. B. do; Regis,Jonh E. F.. |
| The objective of this study was to evaluate the quality of air, bioclimatic indexes of facilities and physiological indices of Guzera and Sindhi calves, reared in climatic conditions of Agreste. The study was conducted at the experimental station of Alagoinha, PB, Brazil, using 16 calves of Sindi and Guzerá races. The average concentration of oxygen (20.85%), ammonia (1.99 ppm), carbon monoxide (<0.01 ppm), methane (0.13 ppm) and hydrogen sulfide (<0.01) within facilities, were within the limits established by the Brazilian and international standards, for both animals and workers. The bioclimatic index of temperature and humidity and the temperature of the black globe and humidity index were within the thermal comfort zone for cattle in most of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environment; Cattle; Adaptability; Physiological responses. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000100001 |
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| Coradi,Paulo C.; Martins,Márcio A.; da Costa,Douglas R.; Vigoderis,Ricardo B.; Tinôco,Ilda de F. F.. |
| ABSTRACT Animal welfare is essential for livestock yield gains, which has been ethically justifiable and socially acceptable. Thus, our research aimed to test computational fluid dynamics model (CFD) to simulate heated air within a poultry barn. Data were simulated in CFD software based on Navier-Stokes equations (geometry of 3 m x 6 m, considering a symmetric mesh). As boundary conditions, a temperature of 38ºC was considered for walls where heating pipe outlets are, to the west side, besides a heat flow of zero, in symmetry to the same side. As for the sides east, south and north, walls were taken as isolated, i.e. heat flow equals to zero. The aviary heating system did not achieve a homogeneous temperature distribution, heat flow, heated air pressure... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environment; Animals; Thermal comfort; Airflow. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000500768 |
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| Pereira,Danilo F.; Tavares,Bartira de O.; Lean,Priscilla A. B. Mac. |
| ABSTRACT: Lighting, either in its intensity or in its luminous spectrum, affects the eggs quality. This study evaluated the effect of four lamps (sodium vapor lamp, mercury vapor lamp, fluorescent lamp and incandescent lamp) that have different luminous spectra in the form of commercial poultry eggs. For this, 60 laying hens of the same age were separated for 63 days in four aviaries with reduced and distorted scale. In each treatment, different lamps were installed which provided similar luminous intensities. At the end of the period, these eggs were taken as samples for the fluorescent, incandescent, mercury vapor and sodium vapor lamps. In this way, images were made of these eggs, using a camera installed on a fixed tripod on a flat table with black... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environment; Image analysis; Precision animal production. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000500848 |
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| Leva,Flávia F. de; Camacho,José R.; Oliveira Filho,Delly. |
| This study was conducted to evaluate and compare the behavior of the heating inside poultry shed through gas hood and underfloor heating. The experiment was conducted in poultry shed belonging to the Federal Institute of Education, Science and Technology of Triângulo Mineiro Region, Uberlândia city  state of Minas Gerais (MG), Brazil. The dimensions of the shed are 24 meters long and 9.6 meters wide and with a ceiling height of 3.2 meters. The temperature was measured with an optical thermometer of Minipa brand, MT 350 model. It was used, to the analysis of temperature behavior, the public domain software FEMM 4.2, which uses finite elements techniques, with data collected from two lots. Underfloor heating is made using hot water flowing through a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Energy consumption; Underfloor heating; Environment; Thermal comfort; Solar energy. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400023 |
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| Caldara,Fabiana R.; Rosa,Poliana S. G.; Ferreira,Rony A.; Reis,Nayana M. de O.; Nääs,Irenilza de A.; Paz,Ibiara C. de L. A.; Garcia,Rodrigo G.; Ferreira,Viviane M. O. dos S.. |
| An experiment was conducted to evaluate the behavior, performance and physiological parameters of pigs in different production systems. Twenty four animals in the growth phase were distributed in a randomized block design in three treatments: T1 - concrete floor, T2 - deep bedding with wood shaving, and T3 - deep bedding with coffee husks. The behavioral study was carried out by observing the animal behavior for an uninterrupted period of eight hours throughout seven weeks. The proportions of time spent in each behavior were characterized using the frequency histogram composition. Environmental (IBGTH), physiological (rectal and skin temperature and respiratory rate) and performance (weight gain, feed intake and feed conversion) parameters were measured in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environment; Animal welfare; Coffee husks; Wood shaving; Swine production. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000100005 |
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| Registros recuperados: 341 | |
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