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| Registros recuperados: 31 | |
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| Azadbakht, Mohsen; Kiapey, Ali; Jafari, Ali. |
| Leaves scattered on the parks, passages, and other places have a detrimental effect on the beauty of the environment, and decrease photosynthesis, hence, the efficiency of plants. Leaves are also used in the production of peat. This makes using leaves collectors in parks, and organizations with a green space useful. Due to the fact that leaves take up a high volume, their transportation is difficult. Using the machine introduced in this paper which was equipped with a suction-blower system, increases efficiency, and at the same time decreases the costs of green space, and their workforce cost. Focusing on overcoming the mentioned difficulties, this study was carried out in order to design and produce a tractor powered leaves collector equipped with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leaves collector; Blower system; Suction system; Design; Power; Tractor. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2850 |
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| Bakhtiari, Mohammad Reza. |
| Potato is one of the most important agricultural products that has great nutritional and industrial value. Potato seed tubers are usually used for growing this crop, but separating the seed tubers from the edible ones is tedious, time consuming and costly process. Therefore, a rotating potato sorting machine was designed, developed and evaluated in this research. This machine was able to sort potato tubers according to their size. Effects of sieves slope angle and rotational speed on the tubers mechanical damage, sorting accuracy and capacity of designed machine were evaluated. The test was conducted in the factorial experiment format with three replications based on a completely randomized experimental design. Three levels of sieves slope angle (5, 10 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Design; Development; Edible; Potato; Seed; Sorting. |
| Ano: 2022 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7299 |
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| Singh, Shiv Pratap; Ekka, Utpal; Singh, Mukesh Kumar; Singh, M K. |
| Traditionally, the unit farm operations which require less muscle power is done by the women workers. The role of farm women are passive in majority of farm operations e.g. clod breaking, taking out weeds etc., assistance in sowing e.g. dropping seeds or carrying seeds, weeding and interculture, harvesting, partly threshing as well as assistance in threshing, winnowing, cleaning-grading, carrying produce as well as grain. During last three decades, many research organizations in the country are working on assessment, refinement and development of gender friendly farm equipment. Based on various study conducted on gender perspective, a need was felt to work on algorithm, as algorithms design is a specific method to create a mathematical process in solving... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Farm Machinery and Power Weeder; Gender-friendly; Mathematical model; Design; Push force; Pull force. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4966 |
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| Alonge, A.F.. |
| This research work involves the design and fabrication of Irvingia nut cracking machines. It operates using impact technique which involves collision between the seednut and stationary wall. The procedures employed the design stage, fabrication and testing. The machine components are: impact drum, shaft, impeller (rotor), electric motor, driver and driven pulley and hopper. The cracking chamber consists of the impeller and impact drum. The seednuts were pre-treated before testing by sun-drying to improve its crackability. The machine gave a better performance at the speed of 2600 revolution per minute with average cracking efficiency, percentage kernel breakage and capacity of 88%, 17.5% and 916 nuts/hr. The improvement in the design can be achieved by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Design; Construction; Irvingia gabonensis; Nut; Cracking; Efficiency. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3086 |
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| Arcidiacono, Claudia. |
| Heat stress in animal housing is one of the drivers affecting animal productivity and welfare in hot climates, and causing consequent reduced profits for the farmers. The main challenges that livestock breeding faces in hot climates regards how to foster, improve, and assess methods and strategies for animal heat stress abatement. Research studies in this field have generally proposed modifications in herd management and in feeding strategies, breed selection, and engineered solutions aimed at exploiting heat transmission phenomena. In this paper, the most recent engineered solutions for animal heat stress abatement in livestock buildings have been reviewed and described; they have involved new building and ventilation design and modelling, and improved... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rural buildings livestock buildings; Design; Modelling; Ventilation; Hot climate. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4705 |
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| MENDOZA,URSULA; CANDELLA,ROGÉRIO N.; ASSAD,LUIZ P.F.; CASTILLO,FEDERICO V.; AZEVEDO,LAURA; KNOPPERS,BASTIAAN A.; ALBUQUERQUE,ANA LUIZA S.. |
| This work addresses the design and configuration of a Eulerian sediment trap mooring array, which was deployed at the shelf edge (zm ≈ 140 m) 80 km off Cabo Frio, SE- Brazil (23° S). The site was subject to interplay between the Tropical Waters (TW) of the Brazil Current (BC), intrusions from the South Atlantic Central Waters (SACW), which are the source of upwelling in the region, and other oceanographic processes. Detailed computations were used to optimize the total weight, buoyancy balance, and maximum acceptable tilt to avoid hydrodynamic bias in the trapping efficiency and array adaptation to the local oceanographic conditions with the assistance of Matlab and Muringa programs and Modular Ocean Model 4.0 (MOM; i.e., to assert the vertical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Design; Mooring array; Sediment traps; Trap efficiency; Cabo Frio upwelling; SE-Brazil. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200589 |
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| Holzapfel,Eduardo A; Pannunzio,Alejandro; Lorite,Ignacio; Silva de Oliveira,Aureo; Farkas,István. |
| Irrigation systems should be a relevant agent to give solutions to the increasing demand of food, and to the development, sustainability and productivity of the agricultural sector. The design, managing, and operation of irrigation systems are crucial factors to achieve an efficient use of the water resources and the success in the production of crops and orchards. The aim of this paper is to analyze knowledge and investigations that enable to identify the principal criteria and processes that allow improving the design and managing of the irrigation systems, based on the basic concept that they facilitate to develop agriculture more efficient and sustainable. The design and managing of irrigation systems must have its base in criteria that are relevant,... |
| Tipo: Journal article |
Palavras-chave: Irrigation; Design; Water management; Operation systems. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000500003 |
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| Talamantes Castorena, Ismael. |
| El estado de Sinaloa es el principal productor de maíz en México bajo riego, aportando el 65% de la producción nacional, sin embargo, la eficiencia de aplicación de riego se mantiene en 45% y escenarios frecuentes de baja disponibilidad hídrica, han puesto en riesgo la estabilidad económica y social del estado. Con el fin de generar alternativas tecnológicas de aplicación inmediata que contribuyan a mejorar la eficiencia en el uso del agua del maíz, en el presente estudio se evaluaron cinco técnicas parcelarias de riego por gravedad de alta eficiencia: 1) surcos alternos, 2) camas, 3) reducción de gasto, 4) riego intermitente y 5) riego deficitario, comparándolas con el sistema tradicional (testigo). El estudio se realizó en el distrito de riego 075 (norte... |
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Palavras-chave: Diseño; Riego de precisión; Productividad del agua; Rendimiento; Design; Irrigation technique; Water use efficiency; Yield; Hidrociencias; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2136 |
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| Almeida,Alex N. de; Coelho,Rubens D.; Costa,Jéfferson de O.; Farías,Asdrúbal J.. |
| ABSTRACT: In Brazil, the conventional center pivot is widely used for irrigation of agricultural crops and its use has grown continuously. However, when improperly managed, it facilitates the development of diseases in all parts of the plant, with a direct effect on productivity, besides favoring losses of water by evaporation. The drip may be an alternative, since it minimizes the losses and does not wet the aerial parts of the plants, thereby reducing the incidence of diseases. A new system called localized mobile drip irrigation (IRGMO) is being developed in an attempt to combine the practicality and rusticity of the center pivot with the efficiency and water savings of the dripping irrigation systems. This fusion system is the central pivot with drip... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Design; Drip irrigation; Center pivot. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000400828 |
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| Campos,Alessandro T.; Castro,Jaqueline de O.; Schiassi,Leonardo; Yanagi Junior,Tadayuki; Pires,Maria de Fátima Á.; Mattioli,Cristiano C.. |
| The goal of this study was to develop a fuzzy model to predict the occupancy rate of free-stalls facilities of dairy cattle, aiding to optimize the design of projects. The following input variables were defined for the development of the fuzzy system: dry bulb temperature (Tdb, °C), wet bulb temperature (Twb, °C) and black globe temperature (Tbg, °C). Based on the input variables, the fuzzy system predicts the occupancy rate (OR, %) of dairy cattle in free-stall barns. For the model validation, data collecting were conducted on the facilities of the Intensive System of Milk Production (SIPL), in the Dairy Cattle National Research Center (CNPGL) of Embrapa. The OR values, estimated by the fuzzy system, presented values of average standard deviation of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Confinement systems; Bovine facilities; Design; Stalls; Dairy cattle. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000600001 |
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| SOARES, J. M.. |
| A irrigacao por inundacao e uma pratica utilizada tanto para a exploracao de terrenos cuja declividade nao exceda 1% e para pequenas manchas de solos situadas nas baixadas ao longo das margens dos rios, cuja topografia se apresenta bastante irregular. As diversas modalidades de irrigacao por inundacao, podem ser empregadas para a exploracao da rizicultura, fruticultura, pastagens ou cereais, dependendos dos tipos de solos (argiloso ou arenoso). O sucesso da irrigacao por inundacao depende do dimensionamento correto e do manejo eficiente do sistema projetado. As informacoes basicas referentes ao solo, suprimento de agua, culturas a serem exploradas e o clima podem proporcionar o dimensionamento tecnico e economico desse metodo de irrigacao. |
| Tipo: Folhetos |
Palavras-chave: Dimensionamento; Flooding irrigation; Management; Irrigação; Inundação; Manejo; Irrigation; Design. |
| Ano: 1988 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133402 |
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| SOARES, J. M.. |
| A irrigação por aspersão e uma maneira prática de aplicação de água no solo para qualquer cultura ou solo. Um sistema de irrigação por aspersão pode aplicar água no solo em intensidades iguais ou menores que a sua velocidade de infiltração, além da possibilidade de ser manejado automática ou manualmente. Em geral, a irrigação por aspersão pode ser empregada em muitas condições de solo e topografia e em áreas onde a irrigação por superfície apresenta-se ineficiente e dispendiosa. O aspersor e a parte mais importante do sistema de irrigação por aspersão. Uma ampla classificação em tipos de aspesores e bocais permite ao projetista selecionar o aspersor apropriado e a pressão de serviço para satisfazer um solo específico e/ou requerimento da cultura. Fatores... |
| Tipo: Livros |
Palavras-chave: Dimensionamento; Irrigação; Aspersão; Irrigation; Design; Sprinkler irrigation. |
| Ano: 1986 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133409 |
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| Registros recuperados: 31 | |
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