Template-Type: ReDIF-Article 1.0 Author-Name: Monika Božiková Author-Name: Petr Hlaváč Author-Workplace-Name: Department of Physics, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Author-Name: Ľubomír Híreš Author-Workplace-Name: Department of Physics, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Author-Name: Zuzana Hlaváčová Author-Workplace-Name: Department of Physics, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Author-Name: Michal Valach Author-Workplace-Name: Department of Physics, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Author-Name: Vlasta Vozárová Author-Workplace-Name: Department of Physics, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Author-Name: Martin Malínek Author-Workplace-Name: Department of Physics, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Title: Temperature effect on various biooils physical parameters Abstract: The article deals with thermal and rheological properties of two selected biooils (PL 64S - sample No. 1, and PL 04N - sample No. 2). For thermal parameters measurements, Hot wire method was used, for detection of rheological parameters rheometer Anton Paar MCR 102 was used and the density was measured by densimeter DM 40. For both biooil samples, two series of thermophysical parameters measurements were made. In the first series thermal conductivity and thermal diffusivity were measured at constant laboratory temperature. The second series was focused on identification of thermophysical parameters changes during temperature stabilisation. The parameters as dynamic viscosity, kinematic viscosity and density were measured in the temperature range (20-50°C). For samples with constant temperature basic statistical characteristics were calculated - standard deviation and probable error in %. For relations of thermal and rheological parameters to temperature nonlinear dependencies were obtained. The polynomial functions of the second degree were used for thermal parameters and exponential functions for rheological parameters. Keywords: thermal parameters, rheological parameters, density, oil, measurement Journal: Research in Agricultural Engineering Pages: 145-151 Volume: 63 Issue: 4 Year: 2017 DOI: 10.17221/60/2015-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/60/2015-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201704-0001.txt Handle: RePEc:caa:jnlrae:v:63:y:2017:i:4:id:60-2015-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Antonio Cordova Author-Workplace-Name: Faculty of Mechanical Engineering, Universidad Nacional de Ingeniería, Rímac, Lima, Perú Author-Name: Juan Manuel Zuñiga Author-Workplace-Name: Faculty of Mechanical Engineering, Universidad de Ingeniería y Tecnología, Barranco, Lima, Perú Author-Name: Jose Luis Mantari Author-Workplace-Name: Faculty of Mechanical Engineering, Universidad de Ingeniería y Tecnología, Barranco, Lima, Perú Author-Name: Helard Henry Alvarez Author-Workplace-Name: Faculty of Mechanical Engineering, Universidad de Ingeniería y Tecnología, Barranco, Lima, Perú Title: Estimation of the power consumed in disc crushers using a static analysis Abstract: The classic forms of disc crusher disintegration simulations are faced using methods that associate their analysis to the stochastic nature of the process. This paper introduces a method that can solve the disc crusher disintegration simulation with a partially deterministic manner. The paper presents the result of the thrust force and the consumed power of disc crushers which is estimated by a static analysis of forces that interact within the discs (fixed and mobile). This methodology uses the calculation of forces and directions involved in the process of particle fragmentation. The fragmented material is characterized. The fragmentation process is simulated with the help of the computer programme to finally estimate the consumed power. For comparison purposes, two types of disc crushers are designed to determine the capability of the method after assessing the results. Keywords: fragmentation, deterministic process, corn Journal: Research in Agricultural Engineering Pages: 152-159 Volume: 63 Issue: 4 Year: 2017 DOI: 10.17221/68/2016-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/68/2016-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201704-0002.txt Handle: RePEc:caa:jnlrae:v:63:y:2017:i:4:id:68-2016-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Mohammad Askari Author-Name: Gholamhossein Shahgholi Author-Workplace-Name: Department of Agricultural Machinery, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran Author-Name: Yousef Abbaspour-Gilandeh Author-Workplace-Name: Department of Agricultural Machinery, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili, Ardabil, Iran Title: The effect of tine, wing, operating depth and speed on the draft requirement of subsoil tillage tines Abstract: In this study, the effect of tine type, adding wing, operating depth and forward speed on the draft requirement of subsoil tillage tines was investigated in clay loam soil. Three subsoil tillage tines (subsoiler, bentleg and paraplow), four levels of forward speed (1.8, 2.3, 2.9 and 3.5 km/h), three levels of depth (30, 40 and 50 cm) and winged and no-wing tines were examined with the exception of bentleg as it would not be winged. It was revealed that draft of the tines is less affected by forward speed but is much affected by tine type, depth and wing. It was observed that an increase of speed and depth plus adding wing results in an increase of draft in all tines. Additionally, it was found that in all depths and speeds, subsoiler required more draft than paraplow and paraplow required more draft than bentleg. Multiple regression models including the studied parameters were developed to predict the draft requirements for each tine with high accuracy. Keywords: soil, subsoiler, bentleg, paraplow, compaction Journal: Research in Agricultural Engineering Pages: 160-167 Volume: 63 Issue: 4 Year: 2017 DOI: 10.17221/4/2016-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/4/2016-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201704-0003.txt Handle: RePEc:caa:jnlrae:v:63:y:2017:i:4:id:4-2016-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Christoforos Perakis Author-Workplace-Name: Centre for Renewable Energy Sources and Saving, Development Programs Division, Pikermi, Greece Author-Name: George Kyriakarakos Author-Workplace-Name: Centre for Renewable Energy Sources and Saving, Development Programs Division, Pikermi, Greece Author-Name: Nabeel Bani Hani Author-Workplace-Name: National Center for Agricultural Research and Extension, Baq'a, Jordan Author-Name: Shaker Hammad Author-Workplace-Name: National Energy Research Centre/Royal Scientific Society, Amman, Jordan Author-Name: Markos Damasiotis Author-Workplace-Name: Centre for Renewable Energy Sources and Saving, Development Programs Division, Pikermi, Greece Title: Investigation of solar-powered drip irrigation: The case study of the Jordan Valley Abstract: Agriculture is the sector that consumes by far most water globally. Much research efforts aim at minimizing losses through the use of drip irrigation. Rural agricultural areas often do not have access to a main electrical grid to power the pumps needed for drip irrigation; it reduces the options in paying for a grid extension, getting a diesel generator or investing in an off-grid renewable energy system. In this paper, these alternatives are assessed technically and economically under real world conditions through the Jordan Valley case study. The results show that the autonomous photovoltaic (PV)-battery system is preferable to the use of a diesel generator, as well as it is preferable to the main grid extension in many cases depending on the cost of grid electricity and distance from the grid. For current subsidized grid electricity retail price to farmers, the PV-battery system becomes more attractive above a 300 m distance from the grid, while if the actual cost of electricity production in Jordan is taken into account, then it breaks even to 128 m. Keywords: photovoltaics, batteries, conventional fuels, pumping, net present cost Journal: Research in Agricultural Engineering Pages: 168-171 Volume: 63 Issue: 4 Year: 2017 DOI: 10.17221/12/2016-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/12/2016-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201704-0004.txt Handle: RePEc:caa:jnlrae:v:63:y:2017:i:4:id:12-2016-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Indera Sakti Nasution Author-Name: Thomas Rath Author-Workplace-Name: Biosystems Engineering Laboratory (BLab), University of Applied Science Osnabrueck, Osnabrueck, Germany Title: Optimal laser marking of 2D data matrix codes on Cavendish bananas Abstract: A traceability system is an effective tool to guarantee safety in horticultural products and to improve supply chain transparency. A direct data matrix (DM) code created with carbon dioxide laser (wavelength 10.6 µm) can be used as a trust mark on bananas. In this study, green bananas were marked with the above-mentioned CO2 laser. Subsequently, the samples were held under storage conditions. Images of the codes on bananas were captured by using two different cameras; i.e. hyperspectral imaging camera and charge-couple device (CCD) camera. Image processing was used for evaluating print quality of 2D codes based on the ISO/IEC 15415 standard. The quality of the codes on bananas mainly depends on some parameters: laser power, laser energy, marking time per module and storage time. The best readability results were achieved by using laser power of 1.8 W and marking time of 0.09 s per data matrix module, whereby an 80-100% readability of DM codes after the storage was obtained. Keywords: traceability, CO2 laser, image processing, readability Journal: Research in Agricultural Engineering Pages: 172-179 Volume: 63 Issue: 4 Year: 2017 DOI: 10.17221/26/2016-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/26/2016-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201704-0005.txt Handle: RePEc:caa:jnlrae:v:63:y:2017:i:4:id:26-2016-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Riry Prihatini Author-Workplace-Name: Indonesian Tropical Fruit Research Institute, Solok, Indonesia Author-Name: Mohamad Puad Abdullah Author-Workplace-Name: Department of Cell and Molecular Biology, Faculty Biotechnology and Biomolecular Sciences, University Putra Malaysia, Selangor DE, Malaysia Author-Name: Tuan Abdul Rashid bin Tuan Abdullah Author-Workplace-Name: Department of Electrical Engineering, Faculty Engineering, University Tenaga Nasional, Selangor DE, Malaysia Author-Name: Ismail Said Author-Workplace-Name: Department of Electrical Engineering, Faculty Engineering, University Tenaga Nasional, Selangor DE, Malaysia Author-Name: Halil Hussin Author-Workplace-Name: Department of Electrical Engineering, Faculty Engineering, University Tenaga Nasional, Selangor DE, Malaysia Author-Name: Norihan Mohamad Saleh Author-Workplace-Name: Department of Cell and Molecular Biology, Faculty Biotechnology and Biomolecular Sciences, University Putra Malaysia, Selangor DE, Malaysia Author-Workplace-Name: Agro-Biotechnology Institute Malaysia, National Institute of Biotechnology Malaysia, Selangor DE, Malaysia Title: Extremely low frequency electromagnetic field generator suitable for plant in vitro studies Abstract: The extremely low frequency electromagnetic field (ELF-EMF) occurs naturally from the earth and artificially as a human invention. The objectives of this study were to develop a suitable ELF-EMF generator for in vitro plants culture studies and to determine the effect of ELF-EMF exposure on in vitro tobacco (Nicotiana tabacum) growth and chlorophyll content. An ELF-EMF generator, the coGEM 1,000 was constructed using four coils of copper wires that were connected to a transformer, multimeter and rheostat. The coGEM 1,000 suitable for tissue culture plants is able to produce stable and uniform 6 and 12 mT 50Hz ELF-EMF in the four coils of the ELF-EMF generator. The tobacco in vitro plantlets were exposed to 6 and 12 mT of 50 Hz ELF-EMF for a period of 0.5, 1, 2 and 4 hours. The exposure to 12 mT ELF-EMF for an hour increased plant growth (shoot height); whereas the exposure to 6 mT Elf-EMF for an hour increased chlorophyll a, chlorophyll b and the total chlorophyll content. Keywords: chlorophyll content, coGem 1, 000, ELF-EMF, growth, tobacco plant Journal: Research in Agricultural Engineering Pages: 180-186 Volume: 63 Issue: 4 Year: 2017 DOI: 10.17221/47/2016-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/47/2016-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201704-0006.txt Handle: RePEc:caa:jnlrae:v:63:y:2017:i:4:id:47-2016-RAE Template-Type: ReDIF-Article 1.0 Author-Name: editors Title: INDEX OF VOLUME 63 (2017) Journal: Research in Agricultural Engineering Pages: X1 Volume: 63 Issue: 4 Year: 2017 DOI: 10.17221/10402-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/10402-RAE.html File-Format: text/html Handle: RePEc:caa:jnlrae:v:63:y:2017:i:4:id:10402-RAE