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Journal articles on the topic 'Progress'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Walsh, John. "Science Policy Programs Progress." Science 235, no. 4794 (1987): 1320–21. http://dx.doi.org/10.1126/science.235.4794.1320-b.

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WALSH, J. "Science Policy Programs Progress." Science 235, no. 4794 (1987): 1320–21. http://dx.doi.org/10.1126/science.235.4794.1320b.

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Kondro, W. "Fragmented organ donation programs hinder progress." Canadian Medical Association Journal 175, no. 9 (2006): 1043. http://dx.doi.org/10.1503/cmaj.061256.

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4

PENG, H. S., W. Y. ZHANG, X. M. ZHANG, et al. "Progress in ICF programs at CAEP." Laser and Particle Beams 23, no. 2 (2005): 205–9. http://dx.doi.org/10.1017/s0263034605050366.

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Laser technology developments, including construction of a 286-TW Ti:Sapphire laser with a focused intensity of 1021W/cm2, installation of the TIL, prototype of the SG-III, and operation of the SG-II laser are presented. Results of the experiments on hohlraum physics, indirect-drive implosion, Thomson scattering, EOS, and X-ray laser are briefly introduced. Simulations and a code package, LARED, for target physics are outlined.

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Crégut, P., and B. Heyd. "Progress properties for empty Unity programs." Information Processing Letters 69, no. 3 (1999): 107–9. http://dx.doi.org/10.1016/s0020-0190(98)00207-5.

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6

Cantor, Chris. "Progress—What Progress?" Crisis 23, no. 3 (2002): 135–36. http://dx.doi.org/10.1027//0227-5910.23.3.135.

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7

Felton, Richard. "Progress? What progress?" Metal Powder Report 59, no. 4 (2004): 3. http://dx.doi.org/10.1016/s0026-0657(04)00114-6.

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AZEVEDO, ANDRÉ NUNES DE. "AS NOÇÕES DE PROGRESSO DO IMPÉRIO á€ REPÚBLICA: transformações recônditas em uma mesma terminologia." Outros Tempos: Pesquisa em Foco - História 13, no. 22 (2016): 69–88. http://dx.doi.org/10.18817/ot.v13i22.539.

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A palavra progresso teve o seu campo semá¢ntico redimensionado ao longo do peráodo da passagem da Monarquia á República. Durante o peráodo imperial, o valor maior a ser cultivado pela elite polática brasileira era a ideia de construção de uma nação civilizada. A noção de progresso ainda se tornara autônoma á ideia de civilização, e não se encontrava centrada na ideia de desenvolvimento material. Com o advento da República e de uma série de transformações presentes no Brasil e no Rio de Janeiro de fins do século XIX, a ideia de progresso ganha autonomia, passa a se encontrar cada vez mais ce

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Fekete, András, and Peter Szendr'. "Editorial Preface." Progress in Agricultural Engineering Sciences 1 (December 2004): 5–6. http://dx.doi.org/10.1556/progress.0.2004.1.1.

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Sztachó-Pekáry, István. "The Effects of Fan Nozzles Orifice Wear on Flow Rate and Spray Pattern." Progress in Agricultural Engineering Sciences 1 (December 2004): 7–29. http://dx.doi.org/10.1556/progress.0.2004.1.2.

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Jóri, István J. "Tillage Intensity and Tillage-Induced CO2Loss." Progress in Agricultural Engineering Sciences 1 (December 2004): 31–45. http://dx.doi.org/10.1556/progress.0.2004.1.3.

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Fekete, András, and Péter Szendrő. "Editorial Preface." Progress in Agricultural Engineering Sciences 1, no. 1 (2005): 5–6. http://dx.doi.org/10.1556/progress.1.2005.1.1.

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Szente, Márk. "Slip Calculation and Analysis for Four-wheel Drive Tractors." Progress in Agricultural Engineering Sciences 1, no. 1 (2005): 7–31. http://dx.doi.org/10.1556/progress.1.2005.1.2.

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The objective of the research of tires was to determine the dynamic rolling radius and to apply it to wheel slip calculations with special respect to vertical wheel load and to tire inflation pressure. It is typical of mechanical four-wheel drive tractors that there is a definite additional power in the tractor power chain. This additional power is dependent on the difference between the front wheel and rear wheel peripheral speeds. Further-more, the purpose was to determine the effect of additional slip on four-wheel drive tractors operated without drawbar pull. Experiments were performed on

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Szendrő, Péter, József Nagy, and Gyula Vincze. "Analysis of Chopping Cylinder Drive Torque Components." Progress in Agricultural Engineering Sciences 1, no. 1 (2005): 33–56. http://dx.doi.org/10.1556/progress.1.2005.1.3.

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Chopping biomaterials is an energy consuming process where considerable losses occur because of friction and the compaction of the material. The objective of the paper reported here is to show an energy saving chopping cylinder drive mechanism and to analyze the variations in the drive torque of the chopping cylinder. The chopping mechanism consists of a flexible drive mechanism. Field experiments were performed with a chopper fitted with such a mechanism and the components of the drive torque were determined from the results. The random excitation of the flexible drive mechanism (“multikator”

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15

Vranić, Marina, Mladen Knežević, Zsolt Seregély, Krešimir Bošnjak, Josip Leto, and Goran Perčulija. "Prediction of Dry Matter and Crude Protein Content in Fresh Grass Silage by Near Infrared Spectroscopy." Progress in Agricultural Engineering Sciences 1, no. 1 (2005): 57–75. http://dx.doi.org/10.1556/progress.1.2005.1.4.

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Intensive livestock feeding requires constant monitoring of diet composition to ensure a consistent level of milk or meat production. A rapid analysis of fresh grass silage samples for dry matter (DM) and crude protein (CP) content would provide basic, rapid information what would permit decision to be made regarding the need to supplement the diet. The aim of the present study was to determine dry matter (DM) and crude protein (CP) content in fresh grass silage samples by NIR spectroscopy. Crude protein content can be expressed as g per kg dry matter (g kg-1 DM) or as per cent of fresh weight

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16

Gillay, Bíborka, and David B. Funk. "Effects of Non-uniform Kernel Moisture Content on Moisture Measurement of Corn." Progress in Agricultural Engineering Sciences 1, no. 1 (2005): 77–93. http://dx.doi.org/10.1556/progress.1.2005.1.5.

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The price paid for corn is usually based on 15.0 or 15.5 percent moisture content. However, corn must be dried below 13 percent moisture to ensure safe storage for a year or more. In the U.S., such stored corn cannot be directly remoistened before selling it, but it can be mixed with moist new-crop corn. Accurate moisture measurement of mixtures of dry and moist corn is important to permit adjustment of blending ratios to maximize profitability, but grain moisture meters are less accurate for mixtures of wet and dry grain. This research evaluated the differences between dielectric-type moistur

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Mészáros, Péter, Eszter Vozáry, and David B. Funk. "Connection between Moisture Content and Electrical Parameters of Apple Slices during Drying." Progress in Agricultural Engineering Sciences 1, no. 1 (2005): 95–121. http://dx.doi.org/10.1556/progress.1.2005.1.6.

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Generally the drying process of fruits is followed by weight loss. The weight loss characterizes only the global moisture content of fruits and does not give information about the inner state of tissue. Electrical impedance spectroscopy of biological tissues shows ab-dispersion band that is associated with membrane structures and is sensitive to their integrity and functionality. The aim of this study was to measure the impedance spectra of apple slices during drying and to correlate impedance parameters to moisture content in the different drying periods. The electrical impedance spectra of a

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18

Láng, Z. "Prediction of root damaging during mechanical shaking of fruit trees." Progress in Agricultural Engineering Sciences 10, no. 1 (2014): 1–15. http://dx.doi.org/10.1556/progress.10.2014.1.

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The possible effect of shaker harvest on root damage of 10-year-old cherry trees was studied on a simple tree structure model. The model was composed of elastic trunk and rigid main roots, the ends of which were connected to the surrounding soil via springs and dumping elements. Equations were set up to be able to calculate the relation between shaking height on the trunk and strain in the roots. To get the data for root break and their elongation at different shaking heights on the trunk, laboratory and field experiments were carried out on cherry trees and on their roots. Having evaluated th

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Antal, T., L. Sikolya, and B. Kerekes. "Quality evaluation of different pre-treatments and combined convective-freeze drying of sour cherry (Prunus Cerasus L.)." Progress in Agricultural Engineering Sciences 10, no. 1 (2014): 17–33. http://dx.doi.org/10.1556/progress.10.2014.2.

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In this study, the influences of various pre-treatments and combined drying (CD) on the drying kinetics and quality parameters of sour cherry were investigated. Prior to freeze drying (FD), sour cherry was pre-treated by blanching in boiling water (100 °C, 3 and 6 min), immersion in sugar solution (20% w/w, 10 and 20 min) and blanching (100 °C) in sugar solution (20% w/w, 3 and 6 min). Freeze-drying of raw samples was taken as a control. Combined drying (CD) can be accomplished in two distinct ways: freeze drying assisted with hot-air drying application (FD-HAD) and hot-air drying followed by

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20

Czupy, I. "Energetic comparison of some stump-removing methods." Progress in Agricultural Engineering Sciences 10, no. 1 (2014): 35–51. http://dx.doi.org/10.1556/progress.10.2014.3.

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Concerns about climate change and fossil fuel shortages are encouraging interest in stumps, as alternative energy sources. Stumps are an almost unused resource in the context of bio fuels. Stump harvesting signifies an intensification of forest management compared with conventional stem-only or above-ground biomass-only harvesting. There are many benefits of stump harvesting. These include: the production of wood fuel, fossil fuel substitution, and improved soil preparation.Removing tree trunks in Hungary has been going on according to the principle of stump extraction, which means stumps are

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21

Bodor, P., L. Baranyai, V. Parrag, and Gy Bisztray. "Effect of row orientation and elevation on leaf morphology of grapevine (Vitis vinifera L.) c.v. Furmint." Progress in Agricultural Engineering Sciences 10, no. 1 (2014): 53–69. http://dx.doi.org/10.1556/progress.10.2014.4.

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Grapevine (Vitis vinifera L.) shows morphological plasticity influenced by environmental factors such as radiation and temperature. The effect of row orientation, exposition of leaves and orchard altitude on leaf morphological traits was evaluated. Grapevine cultivar ‘Furmint’ was investigated in this study with the new version of the GRA.LE.D. raster graphic software. The standard OIV (International Organization of Vine and Wine) descriptors were used with additional size parameters. High morphological variability was observed among the leaves collected from 4 different row orientations and 5

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22

Tiba, Zsolt. "Bending and Torsional Vibrations of Long Cardan Drives." Progress in Agricultural Engineering Sciences 2, no. 1 (2006): 1–34. http://dx.doi.org/10.1556/progress.2.2006.1.1.

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23

Sztachó-Pekáry, István. "Influence of Fan Nozzle Tip Orifice Wear on Spray Pattern." Progress in Agricultural Engineering Sciences 2, no. 1 (2006): 35–49. http://dx.doi.org/10.1556/progress.2.2006.1.2.

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24

Patay, István, and Virág Sándor. "Energetic relationships for crushing of soil clods." Progress in Agricultural Engineering Sciences 2, no. 1 (2006): 51–72. http://dx.doi.org/10.1556/progress.2.2006.1.3.

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Clod crushing is a principal problem with soils of high clay content. Therefore, there is a need for determining the conditions for clod breaking and clod crushing. The objective of the work was to develop a special purpose tool for single clod breaking both by rigid support of the clod and by a single clod supported by soil and to develop a machine for clod crushing. Furthermore, the purpose was to determine the relationship between the specific energy requirement for clod crushing in the function of soil plasticity and the soil moisture content by the means of the developed tool and machine.

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25

Mészáros, Péter, and David B. Funk. "Unifying Calibration Parameters for Dielectric Moisture Meter." Progress in Agricultural Engineering Sciences 2, no. 1 (2006): 73–94. http://dx.doi.org/10.1556/progress.2.2006.1.4.

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The Unified Grain Moisture Algorithm is capable of improved accuracy and allows the combination of many grain types into a single “unified calibration”. The purposes of this research were to establish processes for determining unifying parameters from the chemical and physical properties of grains. The data used in this research were obtained as part of the United States Department of Agriculture-Grain Inspection, Packers and Stockyards Administration's Annual Moisture Calibration Study. More than 5,000 grain samples were tested with a Hewlett-Packard 4291A Material/Impedance Analyzer. Tempera

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26

Jung, András, Péter Kardeván, and László Tőkei. "Hyperspectral Technology in Vegetation Analysis." Progress in Agricultural Engineering Sciences 2, no. 1 (2006): 95–117. http://dx.doi.org/10.1556/progress.2.2006.1.5.

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The objective of the work reported is the development of red-edge methodology in order to characterize agricultural vegetation types and the determination of relationships between different vegetation (high biomass, low biomass) and thermal images. Therefore, the aim was to calculate red-edge position (REP) values and compare them to traditional vegetation indices (NDVI) and thermal images. Images were taken by a DAIS 7915 airborne imaging spectrometer that was equipped with an additional thermal imaging system. An exponential relationship was found between the on-curve-evaluation based (REP)

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27

Takács, László, and Gyula Vatai. "Osmotic Pressure Modeling of White Wine Diafiltration and Red Wine Concentration by Reverse Osmosis." Progress in Agricultural Engineering Sciences 2, no. 1 (2006): 119–32. http://dx.doi.org/10.1556/progress.2.2006.1.6.

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During our research concentrations of quality wines were investigated by membrane separation on nanofiltration and reverse osmosis membranes. The practicability of the process was examined by experimental design in our laboratory experiments. The effects of the operating parameters on the efficiency of the methods were analyzed, from which the conclusion was drawn that the sugar content of the wines affects the filtrate capacity considerably. This phenomenon was attributed to the resistance appearing during the process. This resistance is the osmotic pressure which is faced with the driving fo

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28

Pires, Luiz, Miguel Cooper, Nivea Dias, Osny Bacchi, and Klaus Reichardt. "Micro-morphological analysis of the effect of sampling by the volumetric ring method on soil structure." Progress in Agricultural Engineering Sciences 3, no. 1 (2007): 1–19. http://dx.doi.org/10.1556/progress.3.2007.1.

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This report investigates the effect of sampling by the volumetric ring method on pore size number and shape distributions. Soil porosity was analyzed using the micromorphological image analysis technique, which helped to explain soil structure changes near the border of samples collected in cylinders and provided detailed information about pore shape, number, and size distribution variations along the samples. Compaction due to sampling affects mainly large irregular and rounded pores of the soils utilized in this study. When evaluating inaccuracies in density measurements due to the compacted

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Zsom-Muha, Viktoria, and József Felfödi. "Vibration behavior of long shape vegetables." Progress in Agricultural Engineering Sciences 3, no. 1 (2007): 21–46. http://dx.doi.org/10.1556/progress.3.2007.2.

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The acoustic response method is one of the most important dynamic methods used for assessment of the mechanical texture of different fruits and vegetables. The method is based on the mechanical excitation of the sample and the assessment of its resonant frequency. Different approaches are known for the interpretation of the vibration behavior of the samples having definite shapes. According to the most widely used interpretation, the stiffness of the sample ( s ) is dependent on the resonant frequency ( f ) and the mass ( m ) of the sample. The aim was to extend the acoustic response method to

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Dalmadi, István, Dávid Kántor, Kai Wolz, et al. "Instrumental analysis of strawberry puree processed by high hydrostatic pressure or thermal treatment." Progress in Agricultural Engineering Sciences 3, no. 1 (2007): 47–66. http://dx.doi.org/10.1556/progress.3.2007.3.

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High hydrostatic pressure (HHP) processing technology offers the possibility to preserve quality attributes. Objective test methods describing quality in a complex form have an important role in the development of new products and in the quality assurance of different technologies. Therefore, research was performed to compare the effects of HHP treatment and heat pasteurization on visual appearance, volatile composition, taste and texture properties of strawberry purees measured by sensorial and objective methods. Sensory evaluation did not show significant differences between samples. Similar

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Firtha, Ferenc. "Development of data reduction function for hyperspectral imaging." Progress in Agricultural Engineering Sciences 3, no. 1 (2007): 67–88. http://dx.doi.org/10.1556/progress.3.2007.4.

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Algorithms have been developed for controlling the calibration and the measurement cycles of hyperspectral equipment. Special calibration and preprocessing methods were necessary to obtain suitable signal level and acceptable repeatability of the measurements. Therefore, the effect of the noise of NIR sensor was decreased, the signal level was enhanced and stability was ensured simultaneously. In order to investigate the properties of the number of objects suitable for statistical analysis, the enormous size of acquired hypercube (gigabytes per object) should be reduced by vector-to-scalar mat

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Gillay, Zoltán, and László Fenyvesi. "3D reconstruction and calculation of surface area and volume of bell pepper." Progress in Agricultural Engineering Sciences 3, no. 1 (2007): 89–113. http://dx.doi.org/10.1556/progress.3.2007.5.

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There was a method developed that generates the three-dimensional model of not axisymmetric produce, based on an arbitrary number of photos. The model can serve as a basis for calculating the surface area and the volume of produce. The efficiency of the reconstruction was tested on bell peppers and artificial shapes. In case of bell peppers 3-dimensional reconstruction was created from 4 images rotated in 45° angle intervals. The surface area and the volume were estimated on the basis of the reconstructed area. Furthermore, a new and simple reference method was devised to give precise results

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33

Loukanov, Ivan, and Jacek Uziak. "Application of enamel-coating for draught reduction of a mouldboard plough." Progress in Agricultural Engineering Sciences 3, no. 1 (2007): 115–29. http://dx.doi.org/10.1556/progress.3.2007.6.

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The effect of enamel-coating on the draught performance of an animal-drawn mouldboard plough was studied. A single furrow swing mouldboard plough-Maun Series, and the same type enamel-coated plough both ox-drawn, are compared under similar working conditions such as soil moisture content, depth and width of cut and approximately constant speed of ploughing. It was found that the enamel-coating reduces both the plough draught and the specific draught. The percentage reduction of the plough draught for enamel-coated plough compared to uncoated plough varied from 12.7% at 25% soil moisture conten

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Kalácska, Gábor. "Abrasive wear of polymer/steel gear drives." Progress in Agricultural Engineering Sciences 4, no. 1 (2008): 1–26. http://dx.doi.org/10.1556/progress.4.2008.1.

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Research was performed on the friction, wear and efficiency of plastic gears made of modern engineering polymers and their composites both in a clean environment (adhesive sliding surfaces) and in an environment contaminated with solid particles and dust (abrasive), with no lubrication at all. The purpose is to give a general view about the results of abrasive wear tests including seven soil types as abrasive media. At the first stage of the research silicious sand was applied between the meshing gears and the wear of plastic and steel gears was evaluated and analyzed from the point of differe

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Csatár, Attila, and László Fenyvesi. "Effect of UV radiation and temperature on rheological features of multi-layer agricultural packaging foils." Progress in Agricultural Engineering Sciences 4, no. 1 (2008): 27–44. http://dx.doi.org/10.1556/progress.4.2008.2.

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The objective of the work reported here was to determine the influence of UV radiation and environmental temperature on the strength and rheological characteristics of multilayer agricultural packaging foils. The transmission properties of the experimental foils were tested in 286–363.5 nm range. The analysis of transmission properties of the foils showed that the maximum transmission was 10 % and 45 % with the experimental violet foils having 20 % and 5 % UV inhibitor in them, respectively. However, the transmission was higher than 80 % with the white foils of 5 % and 20 % inhibitor.The effec

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Baranyai, László, and Manuela Zude. "Analysis of laser light migration in apple tissue by Monte Carlo simulation." Progress in Agricultural Engineering Sciences 4, no. 1 (2008): 45–59. http://dx.doi.org/10.1556/progress.4.2008.3.

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The distribution of laser light in the tissue of Golden Delicious and Idared apples was measured with backscattering imaging and simulated with Monte Carlo (MC) method. The settings of the vision system (sensitivity and resolution) and the parameters of the laser modules (wavelength, power and beam diameter) were used in a time resolved MC model to optimize the computation. The 1 ns pulse containing 1.42 × 10 7 (at 670 nm) and 2.49 × 10 8 (at 785 nm) photons was selected for the simulation of backscattering on the fruit surface. The statistical effect of the scattering coefficient (µ s ), abso

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Kaszab, Tímea, Ferenc Firtha, and András Fekete. "Influence of non-ideal storage conditions on carrot moisture content loss." Progress in Agricultural Engineering Sciences 4, no. 1 (2008): 61–75. http://dx.doi.org/10.1556/progress.4.2008.4.

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The objective of the work reported here was to determine changes in the moisture content, firmness characteristics, color attributes and NIR absorbance of two carrot cultivars during storage. There was a definite loss in the moisture content that caused changes in the firmness. This result shows that carrot firmness is very sensitive to the moisture content. The firmness — especially the cutting force — is a good characteristic for predicting changes in carrot moisture content during storage. The color characteristics — a* and b* — showed a slight change in the function of the moisture content

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Molina, Jesus, Gyula Vatai, Eszter Fogarassy, and Erika Bekassy-Molnar. "Application of membrane filtration to wastewater desalination." Progress in Agricultural Engineering Sciences 4, no. 1 (2008): 77–92. http://dx.doi.org/10.1556/progress.4.2008.5.

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The problem of wastewater with high content of salt is a frequent problem for the environmental authorities, because the existing municipal and industrial wastewater treatments are incapable to remove effectively inorganic compounds. In this paper an attempt was made to report new results with reverse osmosis (RO) and nano-filtration (NF) membranes to remove salts from fermentation wastewater.The basic target of the experiments was to find an industrial membrane, which can separate salts from fermentation wastewater with a high efficiency and the concentration of the clean water should satisfy

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Farkas, József, and István Dalmadi. "Near infrared and fluorescence spectroscopic methods and electronic nose technology for monitoring foods." Progress in Agricultural Engineering Sciences 5, no. 1 (2009): 1–29. http://dx.doi.org/10.1556/progress.5.2009.1.

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There is a clear need for application of proper methods for measuring food quality and safety in the globalized food-webs. Numerous instrumental methods have been established in the course of the 20th century and are developing further, together with data analysis techniques, for such purposes. Among them, near-infrared and fluorescence spectroscopic methods and chemical sensor arrays called electronic noses show particular promise for rapid, non-destructive, non-invasive and cost-effective ways for assessing changes and enhancing control during processing and storage of foods. Their key advan

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40

Adekalu, K., and D. Okunade. "A model for deficit irrigation analysis of crops." Progress in Agricultural Engineering Sciences 5, no. 1 (2009): 31–53. http://dx.doi.org/10.1556/progress.5.2009.2.

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Scarcity and high cost of water is the most important limiting factor for crop production in irrigated agriculture. Deficit irrigation can be implemented to optimize the use of available water resources and put more land on productive use. A model was developed to determine the savings in water and the economic benefit derived from deficit irrigation. The model was tested using yield-water use data of maize, tomato, okra and cowpea grown under irrigated condition in Nigeria. Cowpea is the main source of plant protein in the local diet and okra one of the major vegetable crops planted in Nigeri

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Patay, István, Miklós Erdélyi, and László Gulyás. "Developing and testing solar collectors." Progress in Agricultural Engineering Sciences 5, no. 1 (2009): 55–74. http://dx.doi.org/10.1556/progress.5.2009.3.

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A relatively new trend is the development of concentrator-type solar collectors and cells for the use in micro-concentrators. The geometry of these concentrators is simple, the reflexion surfaces or mirrors are usually flat-plate surfaces. The relations of radiation in the inner spaces of these collectors are complicated. The OSLO optical edition software can be used to study and simulate the light paths in the concentrator elements and resonators, using the laws of geometrical optics. Based on the results of study and simulation, a pilot collector was built for energetic testing. In the appli

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Kovács, Zoltán, Dániel Szöllősi, and András Fekete. "Application of electronic tongue to soya drink discrimination." Progress in Agricultural Engineering Sciences 5, no. 1 (2009): 75–96. http://dx.doi.org/10.1556/progress.5.2009.4.

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The objective of the research was to compare the taste attributes of different commercial soya drinks. Furthermore, the task was to determine the effect of different ingredients and processing technologies on the taste attributes of the product. Based on the results of electronic tongue measurements the instrument is able to determine the effect of the applied technology and to distinguish soya juice samples according to sensory preferences. Canonical discriminant analysis showed that the groups of two measurements of the same products were overlapping. Therefore, the electronic tongue measure

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Hodúr, Cecilia, Szabolcs Kertész, József Csanádi, Gábor Szabó, and Zsuzsanna László. "Investigation of vibratory shear-enhanced processing system." Progress in Agricultural Engineering Sciences 5, no. 1 (2009): 97–110. http://dx.doi.org/10.1556/progress.5.2009.5.

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In this study the performance of a vibratory shear-enhanced processing system (VSEP) for the concentration of cheese whey was assessed and compared with a classical, cross-flow, plate and frame membrane configuration system (3DTA) with the same membrane (i.e. a C30F UF regenerated cellulose UF membrane with a 30 kDa molecular weight cutoff). The temperature and pressure dependences of the permeate flux, the permeate flux reduction ratio, the resistances and the rejection values were investigated. Comparison of the two systems revealed a definite advantage for the VSEP system equipped with the

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Dani, Árpád, and Péter Szendrő. "Uro-mechanics: Technical solutions in the development of a new urological catheter." Progress in Agricultural Engineering Sciences 5, no. 1 (2009): 111–45. http://dx.doi.org/10.1556/progress.5.2009.6.

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The authors developed and constructed a new type of urological catheter, named “short catheter”. Experiments were performed with the new catheter and the valves developed for the catheter. Based on the results, one can conclude that the material Sh°60 seems to be suitable for constructing valve for short catheter. It meets the basic requirements made for the valve: less than 100 water cm pressure it is able to discharge 300 ml urine within 2 minutes. However, the valves made of material Sh°40 are better for the circumferential ribs and concerning elasticity. Because of the theoretical consider

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Cubero, S., E. Moltó, A. Gutiérrez, et al. "Real-time inspection of fruit by computer vision on a mobile harvesting platform under field conditions." Progress in Agricultural Engineering Sciences 6, no. 1 (2010): 1–16. http://dx.doi.org/10.1556/progress.6.2010.1.

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The best alternative for reducing citrus production costs is mechanization. Machine vision is a reliable technology for the automatic inspection of fresh fruits and vegetables that can be adapted to harvesting machines. In these, fruits can be inspected before sending them to the packinghouse and machine vision provides important information for subsequent processing and avoids spending further resources in non-marketable fruit. The present work describes a computer vision system installed on a harvesting machine developed jointly by IVIA and a Spanish enterprise. In this machine, hand pickers

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Ignat, Timea, Amos Mizrach, Ze’ev Schmilovitch, and József Felföldi. "Bell pepper maturity determination by ultrasonic techniques." Progress in Agricultural Engineering Sciences 6, no. 1 (2010): 17–34. http://dx.doi.org/10.1556/progress.6.2010.2.

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Ultrasonic wave attenuation within the flesh of intact greenhouse-grown pepper (Capsicum annum L.) fruits was measured during growth, to try to correlate this attenuation with quality-related physical properties: firmness, dry weight percentage (DW%) and total soluble solids (TSS) contents, and chemical composition. Twenty examples of each of three cultivars were picked weekly during a 7-week growth period, and weight, color, and ultrasonic wave attenuation were recorded, to nondestructively trace the changes during growth, and each intact pepper was then subjected to a relaxation test to dete

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Brázio, António, Ana Cavaco, and Rui Guerra. "A simplified two layer model for light diffuse reflectance in thin skin fruits." Progress in Agricultural Engineering Sciences 6, no. 1 (2010): 35–72. http://dx.doi.org/10.1556/progress.6.2010.3.

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A simple model of light diffuse reflectance in thin skin fruits is presented. The model is based in a semi-infinite two-layer geometry (skin and flesh) and introduces simplifications due to the fact that the first layer is very thin. The flesh is described in terms of the usual reduced scattering and absorption coefficients µs′ and µa but the skin is modeled by simple reflection (R), absorption (A) and transmission (T) coefficients. The problem of diffuse reflectance is thus reduced to the problem of determining the four constants µs′, µa, R and T. It is shown that the problem can be solved by

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Horváth, Ernő, and György Sitkei. "Energy consumption of tree shakers as a function of frequency." Progress in Agricultural Engineering Sciences 6, no. 1 (2010): 73–83. http://dx.doi.org/10.1556/progress.6.2010.4.

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In the last decade considerable progress was achieved in the theory of tree shakers used for fruit harvesting. New calculation methods were developed including the vibrating soil mass which enabled the calculation of effective soil masses on a strictly physical basis. However, these earlier investigations did not treat with the effect of stroke frequency. In these investigations, first of all, the friction behavior of the soil mass is discussed as a function of stroke frequency. It turned out that the decrease and shifting of the soil deformation waves as a function of distance measured from t

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Patay, István, and Márk Montvajszki. "Capillary volume and evaporation of textile materials." Progress in Agricultural Engineering Sciences 7, no. 1 (2011): 1–15. http://dx.doi.org/10.1556/progress.7.2011.1.

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The objectives of the paper were to show that the evaporation intensity of water can be increased by the application of appropriate textile materials. The purpose was to determine the dependence of the evaporation intensity on the textile characteristics and the influence weather conditions on the evaporation intensity of different textiles. Five different textile strips of different widths and of single- and multi-layer were tested in definite experimental pots under open air conditions. The results of the experiments showed the total evaporation surface of the textiles depended on the textur

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Kecskés-Nagy, Eleonóra, Milan Koszel, and István Sztachó-Pekáry. "Effect of working pressure, travel speed and nozzle wear rate on spray quality of different flat fan nozzles." Progress in Agricultural Engineering Sciences 7, no. 1 (2011): 17–31. http://dx.doi.org/10.1556/progress.7.2011.2.

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The objective of the work was to determine the influence of working pressure and working speed on drop tracks size and changes in flow rate of flat fan nozzles. New nozzles and nozzles after laboratory wear were tested. The influence of nozzles wear on drop tracks size was tested. It was found that the increase in liquid flow rate resulted in higher values of mean diameter of the droplet track. The increase in working pressure or working speed causes decrease in drop tracks size and reduction in merging of droplets on sprayed surface. The increase of the wear was followed by increased coverage

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