scholarly journals A first study on earth-air heat exchanger in Pelotas

2020 ◽  
Vol 5 (6) ◽  
Author(s):  
Eduardo De Sá Bueno Nóbrega ◽  
Ruth Da Silva Brum ◽  
Jairo Valões de Alencar Ramalho ◽  
Régis Sperotto Quadros
Keyword(s):  
Standard Penetration Test ◽  
Subtropical Climate ◽  
Penetration Test ◽  
In Situ Data ◽  
The Earth ◽  
Air Conditioning Systems ◽  
A Site ◽  
The City

Earth-air heat exchangers (EAHE) represent a promising option to reduce theheating/cooling load of buildings. Unlike traditional air conditioning systems, the EAHE employ a renewable source of energy and they can work using low electric power. Basically, EAHE employ underground ducts where the air is blown to exchange heat with the ground. Since the superficial layers of the Earth are warmer than outside air in winter and cooler than it in summer, the soil canbe used as a heat source or sink. Therefore, the air leaves the ducts at milder temperatures. Recent research has shown that the Brazilian south region, where prevails a subtropical climate, has a high potential for the use of EAHE. However, such references are still very limited. Hence, this work aims to analyze the thermal performance of EAHE considering the city of Pelotas, located in the south Brazilian state of Rio Grande do Sul. As a case study, we used in situ data, covering thesoil geotechnical profiles from a site in the city, which were obtained by a standard penetration test (SPT). To make the computer simulations, we used an analytical model, which was previously tested and validated. The results point out good prospects for the installation of these devices in the city of Pelotas, taking advantage of its geological potential

Assessment of the range of variation of Nγ from 60 estimation methods for footings on sand

2013 ◽  
Vol 50 (7) ◽  
pp. 793-800 ◽  
Author(s):  
Edgar Giovanny Diaz-Segura
Keyword(s):  
Friction Angle ◽  
Standard Penetration Test ◽  
Estimation Methods ◽  
Penetration Test ◽  
In Situ Tests ◽  
Vertical Loading ◽  
Simplified Method ◽  
Bearing Capacity Factor ◽  
Range Of Variation

The range of variation of the bearing capacity factor, Nγ, was assessed using 60 estimation methods for rough footings on sand subjected to static vertical loading. The influence on the Nγ values of the use of correlations for the estimation of the friction angle, [Formula: see text], derived from in situ tests was also assessed. The analysis shows a marked dependency on the methods used to determine Nγ, showing differences for the same [Formula: see text] values of up to 267% between estimated values. Uncertainty in the estimation of [Formula: see text], due to the use of correlations with in situ tests, leads to a range of variation for Nγ higher than that seen using the 60 estimation methods. Finally, given the regular use of the in situ standard penetration test (SPT) on sands, and based on a series of analyses using finite elements, a simplified method in terms of the SPT N-values is proposed for estimation of Nγ in footings on sands.

scholarly journals SENSORIAMENTO REMOTO APLICADO AO MANEJO DA IRRIGAÇÃO EM ÁREAS COM ESCASSEZ DE DADOS: ESTUDO DE CASO EM PIVÔ CENTRAL EM ITATINGA-SP

Irriga ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 585-598
Author(s):  
Pedro Henrique Jandreice Magnoni ◽  
Cesar De Oliveira Ferreira Silva ◽  
Rodrigo Lilla Manzione
Keyword(s):  
Remote Sensing ◽  
Water Budget ◽  
Irrigation Management ◽  
Irrigation Scheduling ◽  
In Situ Data ◽  
Joint Application ◽  
E Mail ◽  
Sentinel 2

SENSORIAMENTO REMOTO APLICADO AO MANEJO DA IRRIGAÇÃO EM ÁREAS COM ESCASSEZ DE DADOS: ESTUDO DE CASO EM PIVÔ CENTRAL EM ITATINGA-SP*     PEDRO HENRIQUE JANDREICE MAGNONI1; CÉSAR DE OLIVEIRA FERREIRA SILVA1 E RODRIGO LILLA MANZIONE2   1 Departamento de Engenharia Rural, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista", Avenida Universitária, n° 3780, Altos do Paraíso, 18610-034, Botucatu, São Paulo, Brasil,  [email protected]; [email protected]. 2 Departamento de Engenharia de Biossistemas, Faculdade de Ciências e Engenharia, Universidade Estadual Paulista “Júlio de Mesquita Filho”, Rua Domingos da Costa Lopes, 780, CEP 17602496, Tupã – SP, Brasil. E-mail: [email protected]. *Este artigo é proveniente das dissertações de mestrado dos dois primeiros autores.     1 RESUMO   Ferramentas baseadas em sensoriamento remoto possibilitam o monitoramento do balanço hídrico da água em diferentes resoluções espaciais e temporais. Ainda assim, modelos que exigem dados in-situ impossibilitam sua aplicação em áreas com escassez de dados. No sentido de lidar com esse desafio, o presente trabalho apresenta uma abordagem de escolha do momento de irrigar, pelo balanço hídrico da água no solo, baseada em estimativa da evapotranspiração real (ETA) obtida com o uso conjunto de imagens multiespectrais do sensor MSI/SENTINEL-2 e dados de uma estação meteorológica pública. A área de estudo foi um pivô central localizado no munícipio de Itatinga-SP. Para a tomada de decisão do momento de irrigar, com base em um manejo por lâmina de irrigação fixa, foi feita a interpolação da fração evapotranspirativa entre os dias com imagens disponíveis para obter a ETA nos dias sem imagens por meio do seu produto com a evapotranspiração de referência. Essa abordagem captou variações climáticas essenciais para a estimativa do balanço hídrico em dias sem imagem. Destaca-se nessa aplicação conjunta sua capacidade de ser realizada sem necessitar de parâmetros específicos da cultura, do microclima ou do relevo, tornando-se interessante para regiões com escassez de dados.   Palavras-chave:  evapotranspiração, momento de irrigar, agriwater.     MAGNONI, P. H. J.; SILVA, C. O. F.; MANZIONE, R. L. REMOTE SENSING APPLIED TO IRRIGATION MANAGEMENT IN AREAS WITH LACK OF DATA: A CASE STUDY IN A CENTRAL PIVOT IN ITATINGA-SP     2 ABSTRACT   Remote sensing-based tools allow the monitoring of water budgets over different spatial and temporal resolutions. Nevertheless, some models require in situ data, preventing their application in areas with a lack of data. To address this challenge, this work presents an approach for irrigation scheduling, based on soil water budget estimation using actual evapotranspiration (ETA) obtained using MSI/SENTINEL-2 multispectral images and data from a public meteorological station. The study area consisted of a central pivot located in the municipality of Itatinga-SP, Brazil. For decision-making of irrigation scheduling, considering a fixed irrigation rate, the evapotranspiration fraction was interpolated between the days with available images to obtain the ETA on the days without images using its product with the reference evapotranspiration. This approach captured essential climate variations for estimating the water budget on non-image days. Noteworthy in this joint application is its suitability to be performed not requiring crop-, microclimate- or relief-specific parameters, making it useful for regions with a lack of data.   Keywords: evapotranspiration, irrigation scheduling, agriwater.

Improving Climatic Comfort of Citizens by Adjusting the Orientation and Extension of Physics of City Squares: Case Study of Yazd

2017 ◽  
Vol 05 (02) ◽  
pp. 1750012
Author(s):  
Fouad KHEIRABADI ◽  
Hooshmand ALIZADEH ◽  
Hossein NOURMOHAMMADZAD
Keyword(s):  
Solar Radiation ◽  
Correlation Method ◽  
The Body ◽  
Human Beings ◽  
The North ◽  
The Earth ◽  
The City ◽  
High Building ◽  
Software Measures

The heat of the earth is provided by solar radiation. A change in the angle of solar radiation and the surface of the earth causes changes in the ambient temperature. Sometimes, these changes reduce climatic comfort of human beings. Climatic comfort is established when there is a balance between excreted and absorbed temperatures of the skin of the body. Orientation and extension rates of physics of squares relative to the geographical north influence the amount of received direct sunlight in different months. Relevant studies show that the squares of the city of Yazd reduce the climatic comfort of its citizens; moreover, the physics of Yazd's squares apply various extension rates, which led to high building costs to citizens and relevant organizations. This study, by using the correlation method and R software, measures different orientation and extension rates of physics of squares in Yazd. It analyzes two models with orientation and physical extension as variables and evaluates the shade and sunlight in the space. The results reveal significant differences between desirable and undesirable options. Considering the climatic comfort of space users and residents at the same time, a rectangle with an extension ratio of one to several and the north-south orientation, making the lowest facade face the south, is the most appropriate physic for city squares.

scholarly journals Kalman filter physical retrieval of surface emissivity and temperature from geostationary infrared radiances

2013 ◽  
Vol 6 (12) ◽  
pp. 3613-3634 ◽  
Author(s):  
G. Masiello ◽  
C. Serio ◽  
I. De Feis ◽  
M. Amoroso ◽  
S. Venafra ◽  
...  
Keyword(s):  
Kalman Filter ◽  
High Temporal Resolution ◽  
Target Area ◽  
Surface Emissivity ◽  
In Situ Data ◽  
Infrared Imager ◽  
Filter Approach ◽  
Infrared Radiances

Abstract. The high temporal resolution of data acquisition by geostationary satellites and their capability to resolve the diurnal cycle allows for the retrieval of a valuable source of information about geophysical parameters. In this paper, we implement a Kalman filter approach to apply temporal constraints on the retrieval of surface emissivity and temperature from radiance measurements made from geostationary platforms. Although we consider a case study in which we apply a strictly temporal constraint alone, the methodology will be presented in its general four-dimensional, i.e., space-time, setting. The case study we consider is the retrieval of emissivity and surface temperature from SEVIRI (Spinning Enhanced Visible and Infrared Imager) observations over a target area encompassing the Iberian Peninsula and northwestern Africa. The retrievals are then compared with in situ data and other similar satellite products. Our findings show that the Kalman filter strategy can simultaneously retrieve surface emissivity and temperature with an accuracy of ± 0.005 and ± 0.2 K, respectively.

scholarly journals PENGEMBANGAN METODE ANALISIS RISIKO BENCANA: SEBUAH STUDI KASUS PULAU LOMBOK

2018 ◽  
Author(s):  
Syamsuddin
Keyword(s):  
Risk Index ◽  
Input Parameter ◽  
Hazard Index ◽  
Warning System ◽  
Disaster Mitigation ◽  
Hazard Risk ◽  
Input Parameters ◽  
A Site ◽  
The City

Earthquakes often cause fatalities to human being. Unfortunately, the event of earthquakes cannot be forecasted. But, the hazard risk due to these earthquakes could be reduced if the geological, seismic and physical surface conditions are known. This reduction plays an important role in disaster mitigation. This paper discusses the development of a method for hazard risk analysis due to earthquakes. The development is based on the input parameters of the hazard and vulnerability components of a site being investigated. Each parameter is then rated, so the total rating of hazard and vulnerability input parameters is obtained. The comparison between the applied rating and the total rating of hazard and vulnerability input parameters results in an index of each input parameter, consecutively. Thus, the multiplication of indexes, (hazard and vulnerability), results in a hazard risk index. Based on the proposed hazard index, a case study in the city of Mataram of Lombok Island has been conducted. The result shows that the city of Mataram has a medium hazard risk index. This means that if an earthquake occurs in the city of Mataram, a medium scale of fatalities may be experienced by the city. However, this index should be considered as an early warning system in disaster mitigation. So, the real condition of the city should be evaluated in order to increase the degree of preparedness due to the event of earthquakes that could occur at any time.

scholarly journals ECOTURISMO E AÇÕES DE SUSTENTABILIDADE COMO FATORES DE VALORIZAÇÃO DA ATIVIDADE ECOTURÍSTICA EM PRUDENTÓPOLIS, PR

2019 ◽  
Vol 4 (15) ◽  
pp. 106
Author(s):  
Ronaldo Ferreira Maganhotto ◽  
Vanessa Alberton ◽  
Maria Beatriz Petroski Bonetti ◽  
Marciel Lohmann
Keyword(s):  
Data Collection ◽  
Socioeconomic Development ◽  
Local Community ◽  
Structured Interviews ◽  
Sustainable Practices ◽  
The World ◽  
Ecological Tourism ◽  
The City

ECOTOURISM AND SUSTAINABILITY ACTIONS AS VALUING FACTORS OF ECOTOURISM ACTIVITY IN PRUDENTÓPOLIS, PRECOTURISMO Y ACCIONES DE SOSTENIBILIDAD COMO FACTORES DE VALORIZACIÓN DE LA ACTIVIDAD ECOTURÍSTICA EN PRUDENTÓPOLIS, PRRESUMODiante da realidade de que a humanidade cada vez mais se concentra nas grandes cidades, uma das alternativas encontradas é a busca pelo turismo ecológico, que tem crescido de forma significativa no Brasil e no mundo, mas principalmente nos países que apresentam diversidade de belezas naturais e riqueza de fauna e flora. A presente pesquisa, realizada no município de Prudentópolis/PR, apresenta o desenvolvimento dos atrativos ecoturísticos e as ações sustentáveis presentes em cada propriedade. Este estudo de caso foi desenvolvido entre o período de setembro de 2015 a agosto de 2016. A coleta de dados deu-se por meio bibliográfico, documental, observação in loco e entrevista semiestruturada com os proprietários dos empreendimentos. Na coleta de dados foram identificadas várias práticas sustentáveis em cada dimensão da sustentabilidade que permite apontar que essas práticas são propulsoras ao desenvolvimento socioeconômico e valorização do turismo e da comunidade local do Município de Prudentópolis.Palavras-chave: Ecoturismo; Sustentabilidade; Meio Ambiente. ABSTRACT Faced with the reality that humanity is increasingly concentrated in the big cities, one of the alter-natives found is the search for ecological tourism, which has grown significantly in Brazil and in the world, but especially in countries with a diversity of beauties and richness of fauna and flora. The present research, carried out in the city of Prudentópolis/PR, presents the development of the ecotourism attractions and the sustainable actions present in each property. This case study was developed between September 2015 and August 2016, data collection was done through bibliographical, documentary, on-site observation and semi-structured interviews with project owners. In the collection of data, several sustainable practices were identified in each dimension of sustainability, which allows us to point out that these practices are propulsive to the socioeconomic development and valorization of tourism and the local community of the Municipality of Prudentópolis..Keywords: Ecotourism; Sustainability; Environment.RESUMENAnte la realidad de que la humanidad cada vez más se concentra en las grandes ciudades, una de las alternativas encontradas es la búsqueda por el turismo ecológico, que ha crecido de forma significativa en Brasil y en el mundo, pero principalmente en los países que presentan diversidad de bellezas naturales y riqueza de fauna y flora. La presente investigación, realizada en el municipio de Prudentópolis/PR, presenta el desarrollo de los atractivos ecoturísticos y las acciones sostenibles presentes en cada propiedad. Este estudio de caso fue desarrollado entre el período de septiembre de 2015 hasta agosto del 2016. La recabación de datos se dio a través de la recopilación bibliográfica, documental, observación in situ y entrevistas semiestructuradas con los propietarios de los emprendimientos. Durante el trabajo de campo se identificaron varias prácticas sostenibles en cada dimensión de la sostenibilidad que permite apuntar que esas prácticas son propulsoras al desarrollo socioeconómico y valorización del turismo y de la comunidad local del municipio de Prudentópolis.Palabras clave: Ecoturismo; Sostenibilidad; Medio Ambiente.

scholarly journals Strip plazas in the suburbs: a redevelopment framework for convenience centres

2021 ◽  
Author(s):  
Natalie Elizabeth Hickey
Keyword(s):  
Real Estate ◽  
Key Words ◽  
Service Needs ◽  
Suburban Communities ◽  
The People ◽  
Post War ◽  
A Site ◽  
The City

Convenience centres are a prominent retail form in the suburban communities of Toronto. Built to satisfy the goods and service needs of the people who inhabit the suburbs, convenience centres were first built in the post-war era, and consist of one-story retail units connected by a shared canopy. They have one or more rows of parking adjacent to the street and are designed to create a convenient experience for drivers. Convenience centres in Toronto typically occupy real estate along the Avenues and major arterial roads: areas designated in the City of Toronto Official plan to support future intensification, density, and housing. Therefore, the research in this project describes a set of recommendations in the form of a framework for redevelopment of convenience centres. It also outlines a case study for a site in Scarborough, Ontario, in which this framework was applied. Key words: retail; strip plaza; convenience centre; suburbs; redevelopment; Toronto;

scholarly journals Ash plume top height estimate using AATSR

2014 ◽  
Vol 7 (4) ◽  
pp. 3863-3913
Author(s):  
T. H. Virtanen ◽  
P. Kolmonen ◽  
E. Rodríguez ◽  
L. Sogacheva ◽  
A.-M. Sundström ◽  
...  
Keyword(s):  
Volcanic Ash ◽  
Quality Parameters ◽  
Height Estimate ◽  
Brightness Temperatures ◽  
In Situ Data ◽  
Estimate Method ◽  
Ash Plume ◽  
Along Track

Abstract. An algorithm is presented for estimation of volcanic ash plume top height using the stereo view of the Advanced Along Track Scanning Radiometer (AATSR) aboard ENVISAT. The algorithm is based on matching the top of atmosphere (TOA) reflectances and brightness temperatures of the nadir and 55° forward views, and using the resulting parallax to obtain the height estimate. Various retrieval parameters are discussed in detail, several quality parameters are introduced, and post-processing methods for screening out unreliable data have been developed. The method is compared against other satellite observations and in-situ data. The proposed algorithm is designed to be fully automatic, and can be implemented into operational retrieval algorithms. Combined with automated ash detection using the brightness temperature difference between the 11 μm and 12 μm channels, the algorithm allows simultaneous retrieval of horizontal and vertical dispersion of volcanic ash efficiently. A case study on the eruption of the Icelandic volcano Eyjafjallajökull in 2010 is presented. The height estimate method results are validated against available satellite and ground based data.

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