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| Bulanon, Duke M.; Burks, Thomas F.; Kim, Dae G.; Ritenour, Mark A.. |
| A recently discovered fungal disease called citrus black spot, is threatening the Florida citrus industry. The fungal disease, which causes cosmetic lesions on the rind of the fruit and can cause a tree to drop its fruit prematurely, could possibly lead to a ban on sales of fresh Florida citrus in other citrus-producing states. The objective of this research is to develop a multispectral imaging algorithm to detect citrus black spots based on hyperspectral image data. Hyperspectral images of citrus fruits (Valencias) were collected in the wavelength range of 480 nm to 950 nm. Five surface conditions were examined, citrus black spot, greasy spot, melanose, wind scar, and normal one. The first part of the image analysis determined the optimal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural Engineering citrus disease; Multispectral imaging; Hyperspectral imaging. |
| Ano: 2013 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2382 |
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| Soleimani Pour, Alireza; Chegini, Gholamreza; Massah, Jafar. |
| Two main steps in object recognition systems involve feature representation and classification. In this study, the combination of principal components analysis (PCA), linear discriminant analysis (LDA) and support vector machine (SVM) approaches were used to develop a cultivar classification system for Anthurium flower, which PCA, LDA, and SVM were applied for data reduction, feature extraction, and classification, respectively. The system was tested on a database of Anthurium flower images, which included the images of 20 cultivars of the flower with different sizes, angles of rotation placed under the imaging camera, and lighting conditions. Results were evaluated from the two point of view of classification accuracy and processing time, and the approach... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4491 |
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| P, Rajkumar; C, Dr. Indu Rani; N, Dr.Wang; G.S.V, Dr. Raghavan. |
| A study was undertaken to classify the banana fruits based on their ripening/maturity by using zNose flavour detection technique. The quality parameters of banana fruits viz., respiratory quotient (RQ), total soluble solids (TSS), moisture content and firmness at each ripening/maturity stage were determined and the results were correlated with zNose flavour data. The principal component analysis (PCA) was used to identify the ripening/maturity stages of banana fruits and also to test the variability of the observed data. By using multiple linear regression (MLR), models were established to predict the fruit quality parameters. The coefficient of determination (r2) corresponding to the predicted respiratory quotient, total soluble solids, moisture content... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: E-Nose/Z-Nose; Banana fruits; Maturity; Ripening; PCA; MLR. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3359 |
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| Dimitris K. Papanastasiou. |
| Many researchers have found that physiology, welfare, health, and productivity of ruminants are significantly affected when they are exposed to heat-stress conditions. In such cases, heat-stress may also cause a reduction of farmers’ profit in various ways. Heat-stress levels are significantly affected by the prevailing meteorological conditions. This paper aims to study the potential daily peak heat-stress conditions to which sheep are exposed and to classify them according to the prevailing meteorological conditions. For these purposes, temperature, relative humidity, wind speed and incoming solar radiation data were analyzed. The meteorological data were recorded during the summers of the period 2007 – 2012 by an automated... |
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Palavras-chave: Sheep; Heat-stress; Temperature humidity index; Meteorological conditions; Cluster analysis; Greece. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3099 |
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| AURASOPON, APINAN. |
| Time periods of walking-grazing, standing and lyingof cattle’s life can be used to predict their health. However, famer cannot observe those in all the time. Therefore, this paper proposes a simple technique to classify the cattle behaviors by using the magnitude and the variance of accelerometer output signal. There are two steps of algorithm detection, the first step employed the magnitude of each axis for classifying the cattle behaviors into two groups: 1) walking-grazing and standing and 2) lying. After that, the second step used the variance of Y-axis to notify between walking-grazing and standing behaviors. The classification results were inform time periods of each behavior and tested with two cattle. The measured precise times of each behavior... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle behaviors; Accelerometer; Variance; Decision tree and activity monitoring. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3422 |
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| bagherpour, hossein. |
| Near-Infrared (NIR) spectroscopy gives information about the chemical properties of objects, and it is of particular interest for agricultural and food science applications given its rapid and non-destructive nature. This paper presents a study on the prediction of protein content in whole wheat kernels by NIR, comparing two statistical discriminant analysis techniques, namely PLS-DA and LDA, to classify wheat varieties and protein levels at the farm’s site. Data were collected from 3 varieties collected from 9 farms located in the same region, with a total of 54 samples analyzed. The NIR spectrometer used had a range of 950-1650 nm and it was used to classify different wheat samples according to their varieties and protein level. The optimal spectral... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: NIR spectroscopy; Wheat protein; Wheat variety identification; Protein variability. |
| Ano: 2022 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7205 |
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| Coto-Fonseca, Alberto; Rojas, Carlos; Molina-Murillo, Sergio. |
| Besides the need to reduce its own emissions, the challenge of the agricultural sector worldwide is also to adapt to a changing and more variable climate. Coffee is an important crop in Costa Rica based on cultivated area and on the number of families connected to this activity that has a long historical tradition. In this context, the potential distribution shifts of coffee production based on climate change scenarios has been identified and targeted in this study. Bioclimatic variables along with elevation were used to evaluate changes in suitable areas for coffee production under the framework of four climate change scenarios for the year 2070. Results suggest that highlands have a high probability of being suitable for coffee under all four scenarios... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3958 |
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| Calcante, Aldo; Fontanini, Luca; Mazzetto, Fabrizio. |
| Purchasing and maintaining agricultural machines are two of the most considerable costs of the agricultural sector, which includes farm equipment manufacturers, farm contractors and farms. In this context, repair and maintenance costs (R&M costs) generally constitute 10%-15% of the total costs related to agricultural equipment and tend to increase with the age of the equipment; hence, an important consideration in farm management is the optimal time for equipment replacement. R&M cost estimation models, calculated as a function of accumulated working hours, are usually developed by ASAE/ASABE for the agricultural situation in the United States, which is considerably different than agricultural context of other countries. So, the goal of this... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural Engineering; Agricultural mechanization Repair and maintenance costs; Self propelled combine harvesters; Cost estimation models.. |
| Ano: 2013 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2512 |
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| Rashid, Gholami; Hekmat, Rabbani; Ali Nejat, Lorestani; Payam, Javadikia; Farzad, Jaliliantabar. |
| Agricultural machinery is an important source of emission of air pollutant in rural locations. This work deals with the effects of types of tractors and operation conditions on engine emission. The values of some exhaust gases (HC, CO, CO2, O2 and NO) from two common tractors (MF285 and U650) at three situations (use of ditcher, plowing and cultivator) were evaluated in the West of IRAN (Kermanshah). In addition, engine oil temperature at operation conditions was measured. Also results showed the values of exhaust HC and O2 of MF285 are lower than U650, while the other exhausts gases (CO, CO2, and NO) of MF285 are higher than U650. Value of NO emission increased as engine oil temperature increased. All of exhaust gases except CO have a significant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental pollution; Exhaust gases; Tractors. |
| Ano: 2013 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2363 |
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| EKOP, INEMESIT EDEM; Simonyan, Kayode Joshua; Onwuka, Udochukwu Nelson. |
| AbstractThis study was conducted to investigate and compare the mechanical properties of Tympanotonus fuscatus and Pachymelania aurita varieties of periwinkle. The mechanical properties namely; rupture force, rupture energy, deformation and young’s modulus of periwinkle samples were determined. The average force to rupture of P. aurita under longitudinal and transverse loading orientations was higher than that of T. fuscatus. It was also observed that the mean rupture energy of T. fuscatus under longitudinal and transverse loading orientations was lower than that of P. aurita. The mean deformation for T. fuscatus under longitudinal and transverse loading orientations was found to be lower than that of P. aurita. The deformation under transverse loading... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2022 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6071 |
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| Orhevba, Bosede Adelola. |
| The comparative analysis of the effect of hermetic storage models on the quality of soybean seeds was studied. Freshly harvested soybean pods were depodded and the seeds were sundried at 330C temperature with an average relative humidity of 62% for three days. The seeds were then divided into three portions of 400g and each portion was poured into different storage models which were PVC bags of 400g, jars of one litre capacity and another jar (perforated) of one litre capacity which served as the control. The initial quality parameters of the soybean seeds were determined, while the storage models and control were kept for six weeks. Samples in each storage model and control were analysed for proximate composition and other quality parameters at the end of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Post Harvest Technology soybean; Hermetic; Storage; Hectoliter weight; Proximate Composition. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3952 |
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| Amponsah, Shadrack Kwadwo; Sheriff, J Thajudhin; Byju, Gangadharan. |
| Abstract: In India, cassava is consumed as a secondary staple along with the main staple, rice, and many rural poor consume it as the staple in different forms of preparations. Though harvesting is known to be one of the most difficult and cost-intensive field operation in cassava cultivation, mechanisation of cassava harvesting is still very low in most cassava growing areas of India due to topographic constraints, methods and scale of cultivation. The most viable solution to overcome these constraints is to promote the use of more efficient manual harvesting tools. Thus, the main objective of this study was to field evaluate the efficiency of four manual cassava harvesting techniques under different land preparation methods in terms of field capacity,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Farm power and machinery; Agronomy cassava; Field capacity; Drudgery; Coppiced; Efficiency. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2793 |
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| Anyanwu, Cosmas; Ibelegbu, Charity; Ugwu, Chinyere; Okonkwo, Valentine; Mgbemene, Chigbo. |
| This paper presents the design, construction and comparative performance evaluation a cereal slurry sieving machine. For the evaluation, wet slurries of maize, millet and sorghum were each sieved with three sieves of mesh sizes of 1.19 mm, 1.00 mm and 0.354 mm. The machine performed satisfactorily in the sieving of wet maize slurry, recording an efficiency of 85%. The output capacity was 22.07 kg/hr in comparison with 8.82 kg/hr achieved in the traditional manual method. The average sieving time for 1kg of maize slurry using the machine was about 2.5 times shorter than in manual sieving. The sieving capacity of the machine was about 2.4 times higher than that of the traditional manual method. The Analysis of Variance (ANOVA) carried out on the results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cereal; Slurry; Machine design; Sieving capacity; Mesh size; Efficiency. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5737 |
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| Registros recuperados: 1.391 | |
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