Template-Type: ReDIF-Article 1.0 Author-Name: U. Brehme Author-Workplace-Name: Institut für Agrartechnik Bornim e. V. (ATB), Potsdam, Germany Author-Name: U. Stollberg Author-Workplace-Name: Institut für Agrartechnik Bornim e. V. (ATB), Potsdam, Germany Author-Name: R. Holz Author-Workplace-Name: Ingenieurbüro Holz, Falkenhagen, Germany Author-Name: T. Schleusener Author-Workplace-Name: Ingenieurbüro Schleusener, Mixdorf, Germany Title: ALT pedometer - a new sensor-aided measurement system for improvement in oestrus detection Abstract: Without sensor-aided animal data measuring systems far fewer oestrus cycles are recognized because cycle length, oestrus duration and oestrus intensity have developed negatively at high animal performance rates. This development makes it eminently clear that observation of the mating season in the dairy cattle sector is even more important than assumed so far if the financial losses due to insufficient herd fertility are not to become a business problem. Electronic identification and measuring systems represent key technologies for progressive automation in animal husbandry in modern, future-oriented livestock farming. Suitable objective measuring systems are needed in animals husbandry to quickly and safely recognize animal illness, normal oestrus cycle, silent heat or suffering from stress. Pedometer and transponder from different companies play an important role for measuring from animals data and statements in animals health and oestrus monitoring. Modern sensors (sensors, bio sensors), increasingly non-invasive measuring and transfer methods make crucial improvements in the potential for measuring animal data. A new type of pedometer, called ALT pedometer, for three measurement parameters (activity, lying time, temperature), a real time watch and a change measuring time interval was developed. With this system it is possible to select different time intervals between 1 and 60 min for continuous measuring. The results for oestrus detection are excellent. The high correspondence between the measuring parameters activity and lying time allow a statement to be made early and safely on animal illnesses and the time of the oestrus cycle. Keywords: oestrus detection, pedometers, sensors, dairy cow Journal: Research in Agricultural Engineering Pages: 1-10 Volume: 52 Issue: 1 Year: 2006 DOI: 10.17221/4873-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/4873-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-200601-0001.txt Handle: RePEc:caa:jnlrae:v:52:y:2006:i:1:id:4873-RAE Template-Type: ReDIF-Article 1.0 Author-Name: V. Uhlíř Author-Workplace-Name: Faculty of Agronomy, Mendel University of Agriculture and Forestry in Brno, Brno, Czech Republic Author-Name: J. Mareček Author-Workplace-Name: Faculty of Agronomy, Mendel University of Agriculture and Forestry in Brno, Brno, Czech Republic Author-Name: J. Červinka Author-Workplace-Name: Faculty of Agronomy, Mendel University of Agriculture and Forestry in Brno, Brno, Czech Republic Title: Impact of soil compaction in sowing on development and crops of sugar beet Abstract: Putting together work operations minimizes the number of machine passes across the plot, which helps to reduce negative soil compaction and to save fuels. However, the combination of working operations also reflects in the increased weight of machines, which - on the other hand - can result exactly in soil compaction. This is why the potential adverse phenomenon can be compensated by using tyres with a larger contact surface with the base. In the case of sowing root crops, some problems may appear with the application of these tyres as a certain part of the stand has been sown in their track. The paper brings an assessment of the possibility to use twin assembly tyres on the tractor model Fendt 822 and on the sowing drill model Monosem NG plus with 18 drilling mechanisms. Parameters to be assessed were soil compaction, and the development of plants sown inside and outside the tractor track. Although the degree of soil compaction was higher in the tractor track, the biological characteristic of plants including yield reached more favourable criteria of assessment. The situation paradoxically resulted from the creation of more favourable moisture conditions in the soil. Keywords: sowing, sugar beet, soil compaction, combination of working operations Journal: Research in Agricultural Engineering Pages: 11-16 Volume: 52 Issue: 1 Year: 2006 DOI: 10.17221/4874-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/4874-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-200601-0002.txt Handle: RePEc:caa:jnlrae:v:52:y:2006:i:1:id:4874-RAE Template-Type: ReDIF-Article 1.0 Author-Name: M. Kroulík Author-Workplace-Name: Department of Agricultural Machines, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Author-Name: M. Mimra Author-Workplace-Name: Department of Machinery Utilisation, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Author-Name: F. Kumhála Author-Workplace-Name: Department of Agricultural Machines, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Author-Name: V. Prošek Author-Workplace-Name: Department of Machinery Utilisation, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Title: Mapping spatial variability of soil properties and yield by using geostatic method Abstract: The Czech University of Agriculture in Prague (CUA) Farm at Lány started with precision farming technology several years ago. In the first step the yield and nutrients content were monitored. For precision application development, detailed description of soil conditions and interrelationship will be necessary. Pulling force and soil electric conductivity measurement as indirect measuring methods were used for mapping spatial soil variability. These methods demonstrate other ways for description of complex soil media. Keywords: precision agriculture, geostatistics, maps, spatial variability Journal: Research in Agricultural Engineering Pages: 17-24 Volume: 52 Issue: 1 Year: 2006 DOI: 10.17221/4875-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/4875-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-200601-0003.txt Handle: RePEc:caa:jnlrae:v:52:y:2006:i:1:id:4875-RAE Template-Type: ReDIF-Article 1.0 Author-Name: M. Trojanowska Author-Workplace-Name: Department of Energetics of Agriculture, Agricultural University of Cracow, Cracow, Poland Title: Applicability of models based on deterministic chaos theory for forecasting of electricity sales in rural areas Abstract: The applicability of models based on deterministic chaos theory, in particular the self-similar fractal models, logistic models according to Prigogine, logistic models according to Schuster, and heuristic crossing models for one-year-ahead forecasting of the sales of electric energy in the rural areas, is verified in the paper. The model quality assessment was carried out based on the errors analysis of the 10-year ex post forecasts of the electric energy sale to rural consumers by three selected distribution companies. As the electric energy consumption were disturbed by economic crises, the forecasts were developed using not only annual sales value but also using their 2-, 3-, 4- and 5-year totals. The best forecast were obtained when the electric energy sales were predicted using the Schuster and heuristic crossing models, made on the basis of four- and five-year totals of annual sales values. Keywords: electric energy, forecast, deterministic chaos Journal: Research in Agricultural Engineering Pages: 25-29 Volume: 52 Issue: 1 Year: 2006 DOI: 10.17221/4876-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/4876-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-200601-0004.txt Handle: RePEc:caa:jnlrae:v:52:y:2006:i:1:id:4876-RAE Template-Type: ReDIF-Article 1.0 Author-Name: M. Müller Author-Workplace-Name: Department of Material and Engineering Technologies, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Author-Name: P. Hrabě Author-Workplace-Name: Department of Material and Engineering Technologies, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Author-Name: R. Chotěborský Author-Workplace-Name: Department of Material and Engineering Technologies, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Author-Name: D. Herák Author-Workplace-Name: Department of Mechanics and Engineering, Technical Faculty, Czech University of Agriculture in Prague, Prague, Czech Republic Title: Evaluation of factors influencing adhesive bond strength Abstract: In the last ten years periods the bonding technology noted a great boom not only in manufacturing industry but in repairing industry, too. The expansion of chemical industry is the cause of this boom. In this way the use of bonding technology in industrial applications brings considerable cost savings. For the successful use of adhesives the knowledge of used adhesives and of further affecting factors is important. Respecting of this know-how is the presumption of the bonded joint successful design. The breaking of the technological procedure and the incorrect design are very often reasons of wrong joints. The paper contains theoretical in formation about the bonded joints creation and some results of laboratory tests inquiring into the reasons which affect the bonded joint strength. For tests the two-component epoxy adhesives were used. Keywords: bonding, bonding technology, surface preparation, testing of adhesive bonds Journal: Research in Agricultural Engineering Pages: 30-37 Volume: 52 Issue: 1 Year: 2006 DOI: 10.17221/4877-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/4877-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-200601-0005.txt Handle: RePEc:caa:jnlrae:v:52:y:2006:i:1:id:4877-RAE