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| Registros recuperados: 1.391 | |
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| Sangeeta Chopra; Anil K Jain. |
| The gasification of biomass into useful fuel enhances its potential as a renewable energy resource. The fixed bed gasification systems are classified as updraft, Imbert downdraft, throatless downdraft, crossdraft and two stage gasifiers. Updraft gasifiers are suitable for gasification of biomass containing high ash (up to 15 %) and high moisture content (up to 50 %) and generate producer gas having high tar content (50–100 g/Nm3). The high temperature (830 oC) air gasification of biomass in updraft gasifiers increase the lower calorific value of producer gas and reduce the tar content. The updraft gasifiers have been used for gasification of bark, wood blocks, chips and pellets, straw, maize cobs, refuse derived fuel (RDF), and waste pellets with air and... |
| Ano: 1969 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/960 |
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| O. K Owolarafe; C. Arumughan. |
| An assessment of the oil palm plantation management and fruit supply, under the Indian contract-growers scheme was conducted in this study. Data was collected from about 96 plantations on the age of plantation, size of plantation, cost of establishment, maintenance practices and cost , yield of fresh fruit bunches, profitability of the scheme for the farmers and so on. It was observed that most of the plantations (69.8%) are in the range of 6-10 years of age while the size of 1-5 ha dominates the sample (76%). Farmers are able to procure land and source fund for the establishment of plantations. Farmers also perform maintenance activities (irrigation, weeding and fertilizer application) satisfactorily, though incure considerable cost on the activities.... |
| Ano: 1969 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/959 |
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| Sahdev, Ravinder Kumar; Kumar, Mahesh; Dhingra, Ashwani Kumar. |
| Limited sources and rising cost of fossil fuels has instigated researchers to look towards renewable energy resources. Among renewable energy resources, solar energy is required to become indispensable in the future, as it is inexpensive, abundant, inexhaustible, environmental friendly and non-pollutant. Most of the people living in developing countries are dependent on agriculture. Agricultural products are dried to increase the storage life, minimize the packaging requirement and reduce the transportation weight. Solar drying for drying agricultural products is being practiced since long back throughout the world. Because of its drawbacks, advance technique, i.e. greenhouse drying, is being adopted for drying crops to reduce the drying time and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Greenhouse drying; Agricultural products; Convective heat transfer coefficient; Energy and exergy analysis; Economical aspects; Drying performance. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3530 |
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| Ajao, Lukman Adewale. |
| The worldwide connectivity design of embedded wireless sensor-based Internet of Things (IoT) using 6LoWPAN platform has significantly increases in industry. However, the development of smart technology in agriculture precision for remote control, monitoring and sensing usually encounter some challenges in the IoT architecture, these include: high power consumption, interoperability, security, and end-to-end communication. In this paper, the authors developed a smart agriculture precision monitoring system using scheduling-based algorithm techniques to accomplished low energy consumption during the system operations. The IEEE 802.11 b/g/n technology (ESP 8266) was used as IoT gateway, ATmega 2560 development chip, with other wireless sensor nodes (such as... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5929 |
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| Hiroshi Nakashima; Kyoto University. |
| We applied a serial domain decomposition method (DDM) to our two-dimensional discrete element method (DEM) program and investigated the effectiveness of DDM in terms of computer hardware. The developed program could obtain sufficiently accurate results for wheel slip, traction, and gross traction, comparable to DEM without serial DDM. We also confirmed that the soil deformation field under the wheel for DEM with serial DDM was similar to that for DEM without DDM. Moreover, the increased sub-domain loop was effective in reducing computational time in the case of serial DDM. Since each sub-domain loop contains the time integration and coordinate update routine, further optimization of memory usage in our serial DDM may be possible, which would allow... |
| Ano: 1969 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1239 |
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| Jakob, Martina Carola; Thinius, Maxi. |
| Studies across the globe have shown that at least 3 out of 5 milkers experience pain in the musculoskeletal system (MSS), mostly in the upper extremities (DOUPHRATE et al., 2014, JAKOB, 2011, KOLSTRUP, 2012, PINZKE, 2003, TUURE & ALASUUTARI, 2009, KAUKE et al., 2010, THINIUS, 2012). The World Health Organisation (WHO) defines health as a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity. It is well known that dairy farming, and milking in particular is coupled with several risk factors for developing musculoskeletal disorders (KOLSTRUP, 2012). Technical measures seem to be insufficient to avoid physical overload. Therefore a more comprehensive approach seems to be necessary. In this study, four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ergonomics; Health; Safety workplace health promotion dairy farms ergonomics TOP principle participatory approach. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3183 |
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| Kim, Hak-Jin. |
| A front-end loader for agricultural purposes is the most commonly used implement for agri-tractors in Korea. As it is operated to raise, lower and carry various objects in a farming field, it introduces a large amount of stress to a tractor, causing vibrations and often lead to a mechanical breakdown. These high stresses are observed at the starting and ending points of operation, that is, the points at which the highest acceleration and deceleration occur. To reduce the sudden change of the speed, soft-start & end operation were tested with an electrohydraulic directional valve, which has a built-in ramp time spool control function. This valve was controlled by SAE-J1939 associated messages via CANBUS. This shock-absorbing system contains three ECUs... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Front-end loader; Shock absorbing; Electrohydraulic directional valve; J1939; ECU.. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3136 |
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| NOURANI, Ahmed; KADRI, Ahmed; MEHENNI, Mokhtar; SALEM, Ahmed. |
| The aim of this work is determination a several date palm related-information to be utilized in designing of date palm service machines. Different parameters were collected from 37 farms in Biskra province, due its importance in Algerian dates production, such as: height of trees (to crown), circumferences of trees and position of the dates bunch in the tree, number of tractor, irrigation mode. According to the results of this survey, several points were defined applicable in date palm mechanization, such as the machine work height must reach up 8 m higher, in minimum and the irrigation channels and the intercropping are, generally, along the rows which facility the displacement of wheeled machine. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Date palm – mechanization – height of tree – irrigation mode – service machine. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2943 |
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| Ahmed Celik; Ismail Ozturk; Thomas R. Way. |
| Horizontal axis rotary tillers produce irregularities in the tillage depth when they are inappropriately operated and constructed. In such cases, mixing and breaking of soil throughout the tillage layer is not uniform and some untilled ridges will remain at the bottom determining the effect of design and operational characteristics on the height of the resultant ridges at the bottom of the tillage layer. In this study, a method based on the derived geometrical relationships between the rotary tiller operational parameters was developed to determine heights of ridges occurring at the bottom of the tillage layer. The ridge heights can be calculated for various combinations of blade peripheral speed, forward travel speed, rotor radius, and the number of... |
| Ano: 1969 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1168 |
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| Catania, Pietro; Vallone, Mariangela; Lo Re, Giuseppe; Ortolani, Marco. |
| Wine quality depends on many factors, such as the choice of variety, stock, training system, pruning as well as environmental parameters and cultivation techniques performed in the vineyard. Monitoring the micro-climate of grapevine allows to conveniently perform the most important cultivation techniques (soil management, pesticide treatments, green pruning, harvest) thus reducing the operating costs of the vineyard, and increasing the overall quality of the grapes. The aim of the present study is to monitor the micro-climate of grapevine in order to control spring period hazards, to reduce the operating costs of the vineyard and to increase the quality of grapes. For this purpose a Wireless Sensor Network was used, and a comparison was performed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural mechanization; Management vineyard temperature relative humidity Wireless Sensor Network (WSN). |
| Ano: 2013 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2615 |
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| Mazher, Azza. |
| This experiment was carried out during two successive seasons of 2014 and 2015 at the National Research Centre, Dokki, Giza, Egypt, to investigate the effect of irrigation with two types of water (Tap water and Waste water) on growth, and chemical composition of some seedlings of woody trees (Terminalia angustifolia, Rademachera ignea and Ficus mango). Growth parameter (plant hight(cm), No. of leaves/plant, length of root (cm) and stem dimeter (cm) increased significantly in all seedlings by using waste water than tap water, except in Rademachera ignea seedlings irrigated with tap water significantly increased number of leaves compared with wastewater. Irrigation with wastewater significantly increased fresh and dry weight of... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4537 |
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| Kogler, Robert; Quendler, Elisabeth; Boxberger, Josef. |
| Accidents with fertilizer distributors at work happen in the Austrian agriculture every year. In accordance with Machinery Directive 2006/42/EC and the standards ISO 4254-1 and DIN EN 14017, fertilizer distributors undergo a risk assessment before construction and market entry to ensure their complying with these legal recommendations and to eliminate largely the risk of injury for the operators. To determine the accident scenarios, causes, and technical solutions, a narrative analysis of 14 reports of accidents that led to moderate and serious injuries from 2008 to 2010 was done, eight victims interviewed, and seven accident machines and eight new ones, which were sold in 2013, evaluated according to applicable regulations. Mostly farm managers were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Work safety; Ergonomics Agricultural machinery; Fertilizer distributors; Accident analysis; Statistical analysis. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2941 |
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| Suministrado, Delfin C.. |
| Acoustic impulse responses of young coconut fruits were analyzed using Fourier analysis and the correlation of signal characteristics with the mucous-like stage, cooked rice-like stage and leather-like stage maturity levels was determined. Analyses of sound signals of unshaved and shaved fruit samples were performed to determine if the difference in acoustic response could help enhance the differentiation of the fruits at different maturity levels. Results of statistical analysis showed that the frequency of the impulse response of the unshaved fruits increases with maturity levels and are significantly different from each other, while those of the shaved fruits are not. Also, results of regression analysis showed that as the fruits mature and the meat or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Young coconut fruit; Acoustic impulse response; Frequency analysis. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6309 |
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| Dahri, Shahzad Hussain; Mangrio, Munir Ahmed; Shaikh, Irfan Ahmed; Dahri, Zakir Hussain; Syed, Ain-ul-Abad; Jakhrani, Jazib Hussain; Syed, Taimoor Ali. |
| This experiment aimed to determine the crop evapotranspiration (ETc), groundwater input in total water used by wheat crop, and to simulate the CROPWAT model to envisage the crop evapotranspiration rate. To estimate on-field ETc and groundwater contribution the combining lysimeter technique was used. The water levels below the soil surface were kept at 1.60, 2.20, and 2.80 m and each water table depth was replicated three times. The experiment was conducted under silt loam (SL) and silty-clay loam (SCL) soil conditions. The climatic parameters and water balance components were recorded accordingly. The on-field ETc was compared with the predicted ETc by CROPWAT model. Under SL soil, the observed ETc was 442, 427, and 401 mm at the water table depth of 1.60,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water conservation; Irrigation amount; Groundwater; And Crop evapotranspiration. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6605 |
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| Registros recuperados: 1.391 | |
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