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| Registros recuperados: 1.540 | |
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| Bagheri, Nikrooz -. |
| This research is carried out to predict energy efficiency of a solar dryer by adaptive neuro-fuzzy inference system (ANFIS) model. In this model, temperatures in the collector inlet, collector outlet and in the dry chamber exit and also absorbed heat energy by collector and necessary energy for evaporation of product moisture were considered as an ANFIS network inputs. To investigate the capability of ANFIS models in prediction of dryer efficiency, empirical model and regression analysis were used and their results were compared by ANFIS models. To evaluate an accuracy ANFIS models, statistical parameters such as mean absolute error, mean squared error, sum squared error, correlation coefficient (R) and probability (P) were calculated. Results indicated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural machinery solar drying; Efficiency; ANFIS; Empirical modeling.. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2972 |
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| Adamala, Sirisha. |
| Evapotranspiration (ET) is a key variable for hydrologic, climatic and agricultural studies. Accurate quantification of this variable is of utmost importance for irrigation management and crop productivity. With the availability of only meteorological variables in climatic stations, reference gross evapotranspiration (ETo) estimation is becoming a challenging task. Hence, there is a scope to estimate the ETo using various physical and empirical methods. Among physical methods, FAO-56 PM method is best and Artificial Neural Network (ANN) models are accurate empirical methods. Further, ETo can also be estimated using a water budget approach i.e. variable infiltration capacity (VIC) model, which accounts for the sub-grid variability of land use and land cover... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4342 |
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| Omotade, Ifeoluwa Funmilola. |
| A field experiment was conducted to determine the growth and yield performance of hot pepper using aquaculture wastewater. Some parameters used as indicies to ascertain the usability of wastewaters such as pH, Total Suspended Solids (TSS), Dissolved Oxygen (DO), Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), nitrate, phosphate, chloride and Electrical Conductivity (EC) were also considered in the analysis. Soil analysis was also carried out to determine the quantity of the nutrients that affect the growth and yield performance of the pepper. ANOVA was used as a statistical tool for the analysis. The research was carried out at the Department of Fisheries and Aquaculture Technology, Teaching and Research Farm, the Federal University of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil and water engineering; Environmental engineering Aquaculture wastewater; Constructed wetlands; Hot pepper. |
| Ano: 2019 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5266 |
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| chavoshgoli, esmaeil; abdollahpour, shamsollah; ghassemzadeh, hamidreza. |
| The sunflower grain is very popular due to fresh and nutty consumption in some countries such as Iran, Turkey and many Arabic countries which is usually harvested without high capacity harvester at high moisture content in Iran. Also, the available methods have low efficiency for segregation the grains from sunflower head. Therefore, this study was conducted to design, construct and evaluate an innovative separator apparatus using the properties of nutty sunflower and applying kinematic equations. This apparatus includes the threshing and cleaning unit that the variables of its components are adjustable. So, with these capabilities, these variables can be optimized for any variety of sunflowers and this information can be used to develop suitable combine... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5935 |
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| Nkakini, Silas Ovua; Douglas, I. E.. |
| In this study, a comparative evaluation of tractive force models for disc harrowing, at different tillage speeds was carried out in order to determine optimal tillage speeds. The predictive models were developed using dimensional analysis. The tillage operation in a loamy sand soil, at tillage speeds of 1.94 m s-1, 2.22 m s-1 and 2.5 m s-1 respectively was conducted, using trace tractor techniques. Parameters such as drawbar pull, rolling resistance, wheel slip, moisture content, cone index, wheel numeric, contact pressure, speed, width of harrow, depth of harrow, and tractive force were measured. The developed mathematical models describing the tractors tyre-soil interactions parameters were evaluated using sensitivity analysis of the measured... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Predictive; Tractive force; Disc harrowing; Tillage; Loamy; Sand; Soil; Modelling; Sensitivity measurement; Soil moisture.. |
| Ano: 2013 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2374 |
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| da Silva, Raimunda Nonata Oliveira; Cavalcante, Jerffeson Araujo; Gadotti, Gizele Ingrid; Martins, Andrea Bicca Noguez; Teixeira, Sheila Bigolin; Vergara, Rafael Oliveira; de Tunes, Lilian Vanussa Madruga. |
| The objective of this study was to verify the separation of soybean seed lots according tovigor levels by the rapid ethanol test follow ing the adapted ethylometer method. The design used was entirely randomized, with four repetitions. The treatments consisted of five soybean seed lots, which were submitted to germination tests, first germination count, accelerated aging, field emergence, and electrical conductivity and ethanol measurement test. To measure ethanol, 50 soybean seeds were placed in plastic bottles containing 50 mL of distilled water, then placed in a BOD incubator for different temperatures and exposure times. After the imbibition period, measurements were performed with the aid of an adapted ethylometer. It is possible to quantify ethanol... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max L.; Physiological quality; Deterioration; Alcohol. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6453 |
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| F. A., Shreen; Badr, S.E.; Morad, M.M.. |
| This study was carried out at a private farm in Owlad Sakr District, Sharkia governorate Egypt during 2015 summer season. It aimed to maximize wheat crop yield by modifying a stationary thresher. The modification involved tractor mounting the thresher to move among the field and the thresher was attached with a feeding device and a straw container. The experiment was established and designed statistically as a factorial experiment in complete randomized blocks with three replications. The tested treatments were wheat plant feeding rate levels of 500, 700,900 and 1100 kg/h and wheat plant moisture content levels of 16%, 18% and 20% (w.b.). The obtained results showed that the modified thresher decreased the total grain losses with 45.24%, increased the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Develop; Experiment; Threshing efficiency; Mobile thresher. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3505 |
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| Ekka, Utpal; Singh, Naseeb; Bharti, Nitin; Sahoo, P Kumar; Singh, Mukesh Kumar. |
| Broadcasting method for jute seed planting, is time consuming,create constraints in weeding, thinning, fertilizer application and harvesting. Broadcasting method requires thinning operation within three weeksdue to high plant population.Both weeding and thinning are done by hand hoe, which is tedious and time consuming operation. The hand weeding is performed in bending or squatting posture, hence there is increased incidence of knee osteoarthritis amongst squatters who squat for hours a day for many years. Use of seed drill or planter for jute seed reduces burden in intercultural operation and makes the jute cultivation profitable by uniform plant population and saving of seed. Low cost mechanical seed metering system for use in planterwas designed to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Farm machinery equipment Jute mechanization; Seed metering unit; Irregular shape seed. |
| Ano: 2019 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5453 |
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| Kumi, Francis. |
| The postharvest losses of agricultural produce in Ghana and other developing countries is high. Efforts to promote shelf-life extension of the fresh produce is centred around temperature and moisture management. Moisture control by drying is suited to a number of crops as it inhibits microbial decay and physiological processes of deterioration. However, there are often inefficient drying infrastructure in developing countries. Thus, the focus of this research was to structurally modify a chimney solar dryer originally designed by the Horticulture Innovation Laboratory of the University of California, Davis and include sea pebbles in the collector base to enhance its heating system and drying performance. A computational fluid dynamics analysis using ANSYS... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chimney; Dryer; Computational fluid dynamics; Simulation; Moisture content. |
| Ano: 2022 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7005 |
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| Dogra, Ritu. |
| The effect of spade angle and spading frequency on various dependent variables, i.e. specific soil resistance encountered, energy consumed per unit volume of soil moved, weighted mean clod size, soil bulk density, soil cone index and cone index ratio were studied. The experiments were conducted in soil having 15.7% clay, 53.6% silt, and 30.7% sand. During experimentation, moisture content of soil was maintained between 13% and 14%. The spade angles used were A1 (0°), A2 (15°) and A3 (30°). Four levels of bite lengths viz. 4, 6, 8 and 10 cmat travel speed of 18.47 cms-1 were selected for the study. These corresponded to four levels of spading frequencies namely F1 (1.85 cycles s-1), F2 (2.31 cycles s-1), F3 (3.08 cycles s-1) and F4 (4.62 cycles s-1). ... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural Engineering; Farm Machinery and power Engineering spading machine; Spade angle; Spading frequency; Degree of pulverization. |
| Ano: 2017 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3580 |
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| H.T.L. Lai; Wageningen UR Livestock Research; A.J.A. Aarnink; Wageningen UR Livestock Research, Wageningen, the Netherlands; M. Cambra-López; Institute of Animal Science and Technology Universidad Politécnica de Valencia, Spain; T.T.T. Huynh; Nong Lam University, Ho Chi Minh City, Vietnam; H.K. Parmentier; Adaptation Physiology Group, Wageningen University, Wageningen, the Netherlands; P.W.G. Groot Koerkamp; Farm Technology Group, Wageningen University, Wageningen, the Netherlands. |
| The concentration and size distribution of airborne particles were measured inside and outside typical animal houses such as broilers, broiler breeders (both floor housing with litter); layers (floor housing system and aviary housing system); turkeys (floor housing with litter), pigs: fattening pigs (traditional houses, low emission houses with dry feed, and low emission houses with wet feed), piglets, sows (individual and group housing); cattle (cubicle house), and mink (cages). Using an aerosol spectrometer, particles were counted and classified into 30 size classes (total range: 0.25 – 32 µm). Particles were measured on for two days, one in spring and the other in summer, in two of each species/housing combination during 30 min inside and outside the... |
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Palavras-chave: Livestock; Environment; Dust; Particle size distribution animal houses CMD MMD temperature relative humidity. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2465 |
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| Hasan, Md. Mehedi; Rahman, Md. Abedur; Ashik-E-Rabbani, Muhammad. |
| To overwhelmed high human strain and tedious work in urea application for rice cultivation, a manually operated push type Urea Super Granule (USG) applicator was designed and developed. There are four small drive wheels inserted in lieu of float which was fabricated using small steel rings instead of the traditional skid concept. The discharge tubes were reformed with the additional bent PVC tubes. The average effective field capacity and field efficiency of the USG applicator was 0.16 ha/hr and 88.1%, respectively. In the laboratory test, the average missing rate, applicator capacity, the distance amid two dropped USG, covering performance and force requirement in developed model were 6.25%, 13.21 kg/hr, 41.61 cm, 77.5% and 69.18 N. The developed... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4556 |
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| Dennis G. Watson; Tony V. Harrison; Richard W. Steffen. |
| Accurate measurement of fuel consumption is required to quantify the efficiency of an engine orpredict emissions. As part of a larger project, accurate instantaneous fuel consumption data was required for a John Deere 4045T diesel engine. While establishing test criteria, it became evident that literature did not provide clear recommendations on the number of data points or time duration for data collection, for a diesel engine. Fuel consumption tests were conducted using up to 15 data points of percent fuel rate and up to 15 min of data collection. ased on statistical analysis of test results, at least 2 data points (0% and 100% of fuel rate) and 2 min of data collection are recommended for similar fuel-injected, diesel engine fuel rate tests. When a... |
| Ano: 1969 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1238 |
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| Iwe, Maduebibisi; Okoro, Chinonso; Eke, A.B.; Agiriga, Anna. |
| A solar cabinet dryer was fabricated and used in evaluating thin layer drying of Ighu. Three air-plenums (40mm, 60mm, 80mm), three loading densities (330g/mm2, 530g/mm2, 730g/mm2) and three moisture contents (57.8%, 67.3%, 75.6%) were applied to the process of drying to determine their effects on drying time. Fresh Ighu samples were prepared and dried by a natural open sun drying method. The experimental moisture ratios of the samples were fitted to nine drying models. The mathematical models were tested with the drying behaviour of Ighu in the solar dryer and open sun. The Page model and modified Page model were the best model based on statistical parameters of coefficient of determination, root mean square error and reduced mean square errors. They are... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2019 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4956 |
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| Punyong, Kraisorn; Ongsara , Suppakrit; Khongleng , Wilasinee. |
| The aim of this research is to design, develop and test a lemon cutting machine for processing lemon fruits. A prototype is designed and developed to consist of four main parts. Firstly, a power transmission system is designed as a source of power for driving a mechanism to rotate a rotor and blades. Secondly, a suspension system is fabricated with a lockable wheel that is able to fix the machine during the operation process without moving. Thirdly, a feeder system is constructed to include a hole with an incline tray that assists the feeding of lemons into the machine. Finally, a cutting system is manufactured for slicing a lemon into 2 pieces based on shear force. The experimental investigation is performed by a comparative study between the developed... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2023 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/8759 |
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| Kianmehr, Mohammad-Hossein. |
| Abstract: Pellet production is an effective method for efficient use; reduce transportation costs and improvement of economic efficiency for organic wastes such as vermicompost and municipal solid waste compost. Physical and rheological properties of the material are essential for the design of pellet machine accessories. In this study the rheological parameters of yield stress (σ0), shear stress (τ0) and velocity factors (α and β) were determined by using a capillary rheometer. The number of holes of single screw extruder die was also determined according to achieved results. The experiments on the materials at 45% moisture content resulted the values, σ0 = 0.09 MPa, τ0 = 0.009 MPa, α = 3.1 MPa sm-1and β = 0.11 MPa sm-1for paste compost and σ0= 0.506 MPa,... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4274 |
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| Registros recuperados: 1.540 | |
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