Template-Type: ReDIF-Article 1.0 Author-Name: Ladislav Libich Author-Workplace-Name: Department of Technological Equipment of Buildings, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: Michal Hruška Author-Name: Petr Vaculík Author-Workplace-Name: Department of Technological Equipment of Buildings, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: Miroslav Přikryl Author-Workplace-Name: Department of Technological Equipment of Buildings, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic Title: The use of stereophotogrammetry to determine the size and spatial coordinates to generate a 3D model of an animal Abstract: This study considers the process of 3D scanning of farm animals using the method of stereophotogrammetry. This involves taking stereoscopic pictures of an animal, from which the spatial coordinates of selected anatomic points on the animal are determined using triangulation. These points are chosen in such a way to make it possible to determine from them the dimensions used in animal breeding databases and to draw a skeleton to be used in generating a 3D model of the animal. The dimensions of the animals were identified from this test group using an analysis of stereoscopic images and these were then compared with measurements done by hand on the same group. It can be said that the process of scanning farm animals in an authentic environment, which can be modified according to the current needs of the required imaging, was verified based on this measurement. This system also allows us to obtain 3D coordinates for further data evaluation and for the possible generation of a 3D model. Keywords: farm animals, dairy cows, stereoscopic pictures, 3D scanning, modelling Journal: Research in Agricultural Engineering Pages: 47-53 Volume: 63 Issue: 2 Year: 2017 DOI: 10.17221/65/2015-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/65/2015-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201702-0001.txt Handle: RePEc:caa:jnlrae:v:63:y:2017:i:2:id:65-2015-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Petr Junga Author-Name: Pavel Mach Author-Workplace-Name: Department of Agricultural, Food and Environmental Engineering, Faculty of Agronomy, Mendel University in Brno, Brno, Czech Republic Author-Name: Jan Mareček Author-Workplace-Name: Department of Agricultural, Food and Environmental Engineering, Faculty of Agronomy, Mendel University in Brno, Brno, Czech Republic Title: Evaluation of efficiency of technologies for wastewater sludge hygienisation Abstract: The paper compares the methods of hygienisation of wastewater treatment plants sludges with respect to meet legislative requirements of conditions for using the treated sludge on agricultural land. The paper draws a comparison of the experimental results between the method of hygienisation and stabilisation of the sludge through the autothermic aerobic thermophilic stabilisation (AATS) by pure oxygen and the method of sludge hygienisation by pasteurization. Results of the experiment confirm that sewage sludge treated by both assessed hygienisation technologies meets legislation requirements for application to agricultural soil. Keywords: wastewater treatment plant, sludge, indicator microorganism, microbiological standards, stabilisation Journal: Research in Agricultural Engineering Pages: 54-61 Volume: 63 Issue: 2 Year: 2017 DOI: 10.17221/10/2016-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/10/2016-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201702-0002.txt Handle: RePEc:caa:jnlrae:v:63:y:2017:i:2:id:10-2016-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Jiří Vegricht Author-Name: Josef Šimon Author-Workplace-Name: Research Institute of Agricultural Engineering, Prague, Czech Republic Author-Name: Jiří Bradna Author-Workplace-Name: Research Institute of Agricultural Engineering, Prague, Czech Republic Title: Manure leachate production and change in manure weight during the storage depending on the amount of bedding Abstract: In the experiment, a group of 10 dairy cows was housed in a pen bedded with various amounts of wheat straw (5.2-13 kg/cow per day). The resulting mixture of feces, urine and bedding was stored in cubic containers with a volume of 1.5 m3. At regular intervals, the containers containing manure were weighed and manure leachate production was assessed. Daily changes in individual monitored variables over time in accordance with the amount of bedding per livestock unit per day (1 livestock unit = 500 kg live weight) were modelled using nonlinear mixed regression models. It was determined that manure weight changes and daily production of manure leachate released from manure stored in containers were related to storage duration and bedding amount in a statically significant manner. The results support the hypothesis that the amount of bedding has a statistically significant effect on the properties of manure stored in a manure pile. Keywords: manure weight, bedding amount, manure leachate production Journal: Research in Agricultural Engineering Pages: 62-70 Volume: 63 Issue: 2 Year: 2017 DOI: 10.17221/7/2016-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/7/2016-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201702-0003.txt Handle: RePEc:caa:jnlrae:v:63:y:2017:i:2:id:7-2016-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Somaye Akbari Author-Workplace-Name: Department of Biosystems Engineering, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran Author-Name: Reza Amiri Chayjan Title: Moisture content modelling of thermal properties of persimmon (cv. 'Kaki') Abstract: Persimmon is one of the tasty and sweet fruits with short shelf life. Thermal conductivity, thermal diffusivity and specific heat are necessary for storage, drying, packaging and designing of distillation machines. In this research, thermal conductivity and thermal diffusivity of persimmon were calculated using the line-heat source probe and Dickerson method. The experiments were conducted at four temperature levels of 40, 50, 60 and 70°C, and four moisture content levels of 37.77, 56.49, 70.47 and 88.42 (%, w.b). Results showed that the thermal conductivity of persimmon was improved by increasing temperature and moisture content of the samples. The effects of moisture content and temperature on thermal properties were highly significant. Regression equations were established which can be used to estimate thermal property values at different moisture content levels. Keywords: thermal conductivity, thermal diffusivity, specific heat, line heat source Journal: Research in Agricultural Engineering Pages: 71-78 Volume: 63 Issue: 2 Year: 2017 DOI: 10.17221/3/2016-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/3/2016-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201702-0004.txt Handle: RePEc:caa:jnlrae:v:63:y:2017:i:2:id:3-2016-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Christopher Tunji Oloyede Author-Workplace-Name: Department of Agricultural Engineering, Faculty of Engineering and Technology, Ladoke Akintola University of Technology, Ogbomoso, Nigeria Author-Name: Fatai Bukola Akande Author-Workplace-Name: Department of Agricultural Engineering, Faculty of Engineering and Technology, Ladoke Akintola University of Technology, Ogbomoso, Nigeria Author-Name: Kazeem Olaniyi Oriola Author-Workplace-Name: Department of Agricultural Engineering, Faculty of Engineering and Technology, Ladoke Akintola University of Technology, Ogbomoso, Nigeria Author-Name: Oluwole Oluwatoyin Oniya Title: Thermal properties of soursop seeds and kernels Abstract: The thermal properties of soursop seeds and kernels were determined as a function of moisture content, ranged from 8.0 to 32.5% (d.b.). Three primary thermal properties: specific heat capacity, thermal conductivity and thermal diffusivity were determined using Dual-Needle SH-1 sensors in KD2-PRO thermal analyser. The obtained results shown that specific heat capacity of seeds and kernels increased linearly from 768 to 2,131 J/kg/K and from 1,137 to 1,438 J/kg/K, respectively. Seed thermal conductivity increased linearly from 0.075 to 0.550 W/m/K while it increased polynomially from 0.153 to 0.245 W/m/K for kernel. Thermal diffusivity of both seeds and kernels increased linearly from 0.119 to 0.262 m2/s and 0.120 to 0.256 m2/s, respectively. Analysis of variance results showed that the moisture content has a significant effect on thermal properties (p ≤ 0.05). These values indicated the ability of the material to retain heat which enhances oil recovery and can be used in the design of machine and selection of suitable methods for their handling and processing. Keywords: specific heat capacity, thermal conductivity, thermal diffusivity, SH-1 sensors, moisture content Journal: Research in Agricultural Engineering Pages: 79-85 Volume: 63 Issue: 2 Year: 2017 DOI: 10.17221/22/2016-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/22/2016-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201702-0005.txt Handle: RePEc:caa:jnlrae:v:63:y:2017:i:2:id:22-2016-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Jiří Souček Author-Workplace-Name: Research Institute of Agriculture Engineering, Prague, Czech Republic Title: Content of microorganisms in cereal straw Abstract: Straw is an important agricultural raw material with application in agriculture, energy sector and other fields of activity. A major impact on reduction of the straw quality is that of an excessive content of microbiological agents caused by improper storage. By simulation of different conditions of storage the development of microorganisms (moulds and yeasts) was determined in the straw of wheat under different water content. Total content of microorganisms varied in a wide range from 103 up to 105 CFU/g. The excessive amount of these microorganisms results not only in a reduction in the quality of raw material due to the development of biodegradable processes, but also causes an increase of hygienic risks in the nearby area. Keywords: storage of biomass, microbiology, agricultural constructions, health risks, mould, yeasts Journal: Research in Agricultural Engineering Pages: 86-90 Volume: 63 Issue: 2 Year: 2017 DOI: 10.17221/9/2016-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/9/2016-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201702-0006.txt Handle: RePEc:caa:jnlrae:v:63:y:2017:i:2:id:9-2016-RAE Template-Type: ReDIF-Article 1.0 Author-Name: Milan Brožek Author-Workplace-Name: Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic Title: Abrasive wear resistance of selected woods Abstract: In this contribution, the results of the wear resistance study of 10 sorts of wood (apple, aspen, beech, hornbeam, horse-chestnut, London plane, mahogany, silver fir, sour cherry and sweet cherry) are published. The laboratory tests were carried out using the pin-on-disk machine when the abrasive clothes of three different grits (240, 120 and 60) were used. The wear intensity was assessed by the volume, weight and length losses of the tested samples. From the results of the carried out tests it follows that the wear resistance of different woods is different. It was proved that the wear resistance of different woods depends on the abrasive particles size, too. Also the technical-economical evaluation was part of the carried out tests. It was univocally proved that at the intensive abrasive wear using the abrasive cloth the best results were shown by hard woods, e.g. apple, beech or mahogany. Soft woods, e.g. horse-chestnut, silver fir or sweet cherry, are cheap, but their wear is bigger compared to hard woods. Keywords: bonded abrasive particles, abrasive cloth, laboratory tests, technical-economical evaluation Journal: Research in Agricultural Engineering Pages: 91-97 Volume: 63 Issue: 2 Year: 2017 DOI: 10.17221/74/2015-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/74/2015-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201702-0007.txt Handle: RePEc:caa:jnlrae:v:63:y:2017:i:2:id:74-2015-RAE