Template-Type: ReDIF-Article 1.0 Author-Name: M. Müller Author-Workplace-Name: Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: P. Valášek Author-Workplace-Name: Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic Title: Degradation medium of agrocomplex - adhesive bonded joints interaction Abstract: Research of degradation medium occurring in agrocomplex at the current interaction with bonded joints strength and lifetime is desired owing to the possibilities of bonding applications in this dynamically developing field. The bonding technology is used in construction of machines, lines and devices of agriculture, forestry and food industry. Among the perspectives of bonding technologies the adhesive bonding can be considered thanks to its predominant pluses. At the bonding technology or more precisely adhesive bonding technology application the limits must be characterized, which occur in the process of application in the concrete medium. On the basis of characteristics and analyses the countermeasures eliminating the negative factors can be taken. Published results set themselves the goal to know degradation processes taking place in bonded joints contemporarily with taking account of adhesive/adherend interaction with accent on application in agriculture. Experimentally found results confirm the presumption of a significant portion of the adhesive layer on the adhesive bond strength decrease in the practice due to the degradation processes. Keywords: liquid contaminants, bonding method, cyclic degradation, bond strength, bond lifetime Journal: Research in Agricultural Engineering Pages: 83-91 Volume: 58 Issue: 3 Year: 2012 DOI: 10.17221/27/2011-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/27/2011-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201203-0001.txt Handle: RePEc:caa:jnlrae:v:58:y:2012:i:3:id:27-2011-RAE Template-Type: ReDIF-Article 1.0 Author-Name: P. Valášek Author-Workplace-Name: Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: M. Müller Author-Workplace-Name: Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: A. Proshlyakov Author-Workplace-Name: Department of Physics, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic Title: Effect of sedimentation on the final hardness of polymeric particle composites Abstract: In present days composite materials are the indispensable part of many branches. They make a foray into the branch of agricultural production, where they are getting to intensive development of systems utilized e.g. at soil processing. Composites can be defined as materials which synergically combine properties of matrix and filler. One of possibilities of polymeric particle composites preparation is the application of suitable filler together with some types of epoxy resins. This application extends the usable properties of resins. For the exact definition of these materials use it is necessary to map their behaviour. In the paper the problems are described, which concern the composite hardness changes as a consequence of the filler particle sedimentation in the course of the resin curing. The composite matrix was the two-component epoxy resin and the filler were chips of materials cutting process. The use of waste filler suggests itself the ecological possibility of recycling, which should be preferred in consideration to the environment friendliness. Keywords: epoxy resin, hardness, X-ray analysis, waste Journal: Research in Agricultural Engineering Pages: 92-98 Volume: 58 Issue: 3 Year: 2012 DOI: 10.17221/5/2011-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/5/2011-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201203-0002.txt Handle: RePEc:caa:jnlrae:v:58:y:2012:i:3:id:5-2011-RAE Template-Type: ReDIF-Article 1.0 Author-Name: A. Alipour Author-Workplace-Name: Department of Agronomy, University of Zabol, Zabol, Iran Author-Name: H. Veisi Author-Workplace-Name: Department of Agroecology, Institute of Environmental Science, Shahid Beheshti University, Tehran, Iran Author-Name: F. Darijani Author-Workplace-Name: Department of Agroecology, Institute of Environmental Science, Shahid Beheshti University, Tehran, Iran Author-Name: B. Mirbagheri Author-Workplace-Name: RS & GIS Department, Faculty of Earth Sciences, Shahid Beheshti University, Tehran, Iran Author-Name: A.G. Behbahani Author-Workplace-Name: Department of Agronomy, Ferdowsi University of Mashad, Mashad, Iran Title: Study and determination of energy consumption to produce conventional rice of the Guilan province Abstract: The aim of this study was to determine the energy efficiency indices in the agro-ecosystems of the Guilan province in 2010. One hundred and twenty-seven farmers were interviewed using a particularly designed questionnaire. The inputs in the calculation of energy use in agro-ecosystems embraced labour, machinery, electricity, diesel oil, fertilizers, seeds, while rice and straw yield were included in the output. The results depicted that total input and output energy into these agro-ecosystems were about 47,604 and 90,680.04 MJ/ha, respectively. The highest energy input was related to water (38.84%), electricity (27.87%) and nitrogen fertilizer (17.5%). Energy efficiency and energy productivity in these agro-ecosystems was 2.19 and 0.064 kg/MJ, respectively, and water productivity was 0.11 kg/m3. The results also showed that due to application of flood irrigation in these agro-ecosystems and also water elicited from subterranean sources by electrical pump, the inputs had the largest portion among the energy inputs to agro-ecosystems that this matter increased energy use in the unit area and also reduced energy efficiency and productivity. Keywords: energy input, energy output, energy efficiency, energy productivity Journal: Research in Agricultural Engineering Pages: 99-106 Volume: 58 Issue: 3 Year: 2012 DOI: 10.17221/8/2011-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/8/2011-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201203-0003.txt Handle: RePEc:caa:jnlrae:v:58:y:2012:i:3:id:8-2011-RAE Template-Type: ReDIF-Article 1.0 Author-Name: E. Ahmadi Author-Workplace-Name: Department of Agricultural Machinery Engineering, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran Title: Bruise susceptibilities of kiwifruit as affected by impact and fruit properties Abstract: Kiwifruit bruise damage is a common postharvest disorder that substantially reduces fruit quality and marketability. Fruit bruise cause tissue softening and make them more susceptible to undesired agents such as diseases-inducing agents. Factors that affect kiwifruit bruise susceptibility such as impact properties and fruit properties were investigated. Two bruise prediction models were constructed for the damage susceptibility of kiwifruit (measured by absorbed energy) using multiple linear regression analyses. Kiwifruits were subjected to dynamic loading by means of a pendulum at three levels of impact. Significant effects of acoustic stiffness, temperature and the radius of curvature and some interactions on bruising were obtained at 5% probability level. Keywords: absorbed energy, dynamic impact, mechanical damage, postharvest, regression models Journal: Research in Agricultural Engineering Pages: 107-113 Volume: 58 Issue: 3 Year: 2012 DOI: 10.17221/57/2011-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/57/2011-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201203-0004.txt Handle: RePEc:caa:jnlrae:v:58:y:2012:i:3:id:57-2011-RAE Template-Type: ReDIF-Article 1.0 Author-Name: C.F.H. Bishop Author-Workplace-Name: Writtle College, Lordship Road, Chelmsford, United Kingdom Author-Name: A.F.J. Gash Author-Workplace-Name: Department of Agricultural Sciences, Lincoln University, Christchurch, New Zealand Author-Name: C. Heslim Author-Workplace-Name: Writtle College, Lordship Road, Chelmsford, United Kingdom Author-Name: S. Hanney Author-Workplace-Name: Writtle College, Lordship Road, Chelmsford, United Kingdom Title: The coefficient of friction of individual potatoes and various handling materials - Short communication Abstract: The dynamic coefficient of friction of single potatoes was determined on mild steel, rubber and plastic, for tubers in each of four conditions: dry and dirty, wet and dirty, clean and wet and clean and dry. Steel had the lowest overall mean coefficient of friction. The highest value was recorded for plastic, but this material also had the largest coefficient of variation. Overall, rubber was considered to be the most suitable all-condition material for tubers in a range of conditions. Keywords: handling equipment, machinery, potato damage, surfaces Journal: Research in Agricultural Engineering Pages: 114-117 Volume: 58 Issue: 3 Year: 2012 DOI: 10.17221/15/2011-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/15/2011-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201203-0005.txt Handle: RePEc:caa:jnlrae:v:58:y:2012:i:3:id:15-2011-RAE