Tag Archives: lighting

261-268 M. Rajaniemi, M. Turunen and J. Ahokas
Direct energy consumption and saving possibilities in milk production
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Direct energy consumption and saving possibilities in milk production

M. Rajaniemi, M. Turunen and J. Ahokas*

University of Helsinki, Faculty of Agriculture and Forestry, Department of Agricultural Sciences, PL 28 (Koetilantie 5), 00014 Helsingin yliopisto, Finland; *Correspondence: jukka.ahokas@helsinki.fi

Abstract:

Direct energy consumption in milk production varies largely because of machinery, production systems, working habits and maintenance. There are good possibilities to save energy in milk production. The magnitude of energy savings are in the order of tens of percent, which means that energy saving potential is quite high. Energy saving can be achieved with efficient system and machinery choices. Also adjustments and maintenance have an effect on energy consumption. To save energy the farmers should have means to measure energy and follow energy consumption. There should also be more information of energy saving possibilities and machinery energy consumptions.

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889-894 V. Nídlová and J. Hart
The impact of light conditions on identifying facial features
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The impact of light conditions on identifying facial features

V. Nídlová* and J. Hart

Department of Technological Equipment of Buildings, Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 16521 Prague, Czech republic; *Correspondence: nidlova@tf.czu.cz

Abstract:

Biometry in the field of identifying people is a highly topical theme these days. The most widespread area is identification of a person on the basis of fingerprints, nevertheless scanners of the bloodstream, iris and retina in particular are undergoing development, as well as identification on the basis of facial features. In the case of scanners which distinguish people according to their face, user problems are appearing. One of these problems is the surrounding environment of the scanner device, in particular light conditions. According to tests, it is necessary to conduct identification of people under laboratory conditions, which is not acceptable from the user perspective. It is essential to consider this problem and to innovate and extend the system for identification on the basis of facial features. It is necessary for the system to react, if possible, with a minimal error rate and within the fastest response time. Through the help of testing light conditions, an improvement was achieved in the capability of identifying facial features, and at the same time a further modification was proposed to perfect the existing technology.

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293-297 A. Marcinkevičienė, S. Raudonius and R. Velička
Weed suppression by increasing spring rape crop density
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Weed suppression by increasing spring rape crop density

A. Marcinkevičienė, S. Raudonius and R. Velička

Lithuanian University of Agriculture, Studentu 11, Akademija, Kaunas district, LT-53067,Lithuania, e-mail: lzuustotis@hotmail.com, steponas.raudonius@lzuu.lt

Abstract:

Field experiments were conducted in 2003 and 2004 at the Experimental Station of the Lithuanian University of Agriculture to study the influence of different spring rape (Brassica napus L.) densities (50.1–100, 100.1–150, 150.1–200, 200.1–250, 250.1–300, 300.1–350, 350.1–400, 400.1–450 plants m-2) on weed abundance. Increase of crop density and herewith increase of canopy should intensify the competition ability of spring rape plants and suppress weeds better. The results show that light intensity on the soil surface decreases when the assimilation area of spring rape leaves and total crop biomass increases. Weed density decreases when spring rape crop is densier. A significant negative relationship exists between weed biomass and spring rape leaf area index (LAI) (r = -0.62, P < 0.05), as well as between weed biomass and spring rape biomass (r = -0.67, P < 0.01). A significant positive correlation appears between weed abundance and light intensity on soil surface (r = 0.68, P < 0.01).

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