National Repository of Grey Literature 17 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
MIDI over Ethernet
Lukáš, Vojtěch ; Říha, Kamil (referee) ; Krajsa, Ondřej (advisor)
This paper is about designing and building a device to adapt MIDI protocol for use on a standard computer network. The paper also includes a brief description of a network editor, which controls the whole system.
Microcode-Controlled Ram Bist
Lukáš, Vykydal
This paper deals with memory testing principles, focusing mainly on March algorithms. It describes their usage on word based memories. In second part it proposes small programmable BIST controller that can be used in digital circuits.
Creating of variable rate application maps based on the mapping of spatial variability of soil agrochemical properties and crop yield heterogeneity
Lukas, V. ; Neudert, L. ; Širůček, P. ; Kraus, M. ; Novák, J. ; Mezera, J. ; Zemek, František ; Pikl, Miroslav ; Žížala, D.
The methodology describes how to create application maps based on digital soil mapping and soil sampling results and how to determine the dose of variable rate application of fertilizer addressed to spatial variability of nutrient content in soil and crop yields within the field. It includes also the results of a comparison of these procedures with respect to the total amount of fertilizer applied and the occuracy of the dose distribution across the fields.
COMPARISON OF ACTUAL EVAPOTRANSPIRATION FROM ALEXI AND SOILCLIM MODELS
Jurečka, František ; Hlavinka, Petr ; Lukas, Vojtěch ; Trnka, Miroslav ; Anderson, M. ; Hain, C. ; Balek, Jan ; Bláhová, Monika ; Žalud, Zdeněk
Actual evapotranspiration (ETa) determined by the Atmosphere-land Exchange Inverse (ALEXI) model and water balance model SoilClim was compared for selected districts of the Czech Republic. The ALEXI model uses the land surface temperature (LST) from remote sensing and provides information on ETa and subsequently the surface moisture status. The SoilClim is a dynamic model of watcr content in soil and represents a model based on water balance approach. The current version of the model is able to estimate the value of ETa, as well as soil moisture content in two layers of the soil profile. Investigated period of ETa comparison were years 2014 and 2015. Especially the year 2015 had a special relevance due to the significant summer drought that occurred in CR. Model performance was compared for the period when changes in vegetation are most significant from April to August. Week sums of ETa from both models were compared at the district level for Vysodina, JihomorayskY and Olomouck, regions. The ETa values were generally higher from ALEXI as compared to SoilClim. ALEXI values were in some cases even two or three time higher. Moreover, the seasonal dynamics showed sometimes opposite trends. As this is a pilot testing of ALEXI based ETa in the conditions of Central Europe and show large differences as compared to well established methods, more detailed testing is required prior drawing any general conclusions.
Spatial heterogeneity of selected soil properties assessed from airborne imaging spectroscopy and satellite imagery data
Zemek, František ; Pikl, Miroslav ; Lukas, Vojtěch ; Ždímal, V. ; Kraus, M. ; Širůček, P.
The methodology aims at presenting new and economically efficient approaches to assessment of spatial heterogeneity of selected properties of bare soils. There are three key features the authors paid attention: 1/the simplicity in usage with keeping sufficient accuracy, 2/data availability, 3/economic aspects allowing application to many users. The methodology covers two complementary parts. The first one gives an overview of laboratory and field soil spectroscopy. It is followed by a detail description of practical application of airborne hyperspectral and satellite multispectral data in assessment of spatial heterogeneity of bare soils. All applied methods have been developed and tested on scale of medium size farm.
Regional yield forecasting for improved decision making in the plant production
Trnka, Miroslav ; Hlavinka, Petr ; Kudláčková, Lucie ; Balek, Jan ; Meitner, Jan ; Možný, Martin ; Štěpánek, Petr ; Bartošová, Lenka ; Semerádová, Daniela ; Bláhová, Monika ; Lukas, Vojtěch ; Žalud, Zdeněk
The methodology describes how to predict yields of key crops, and at the same time addresses reliability of the predictions and how these can be used. The ability to predict yield levels more than 2 months prior the harvest on the level of regions (NUTS3¨) and districts (LAU1) brings also new opportunities to mitigate impacts of adverse conditions. The methodology shows that the yield forecasts and yield anomalies in particular are consistent and usable in practices. In this methodology, the results of 2018 yield forecasts are presented as an example. The yield forecasting system for the Czech Republic is fully functional and is and will be available through www.vynosy-plodin.cz.
Towards a combining of remote sensing and in situ evapotranspiration measurements
Fischer, Milan ; Jurečka, František ; Anderson, M. ; Hain, C. ; Pozníková, Gabriela ; Hlavinka, Petr ; Orság, Matěj ; Lukas, V. ; Žalud, Z. ; Trnka, Miroslav
This study provides preliminary results from combining in situ Bowen ratio energy balance (BREB) and\nevapotranspiration (ET) measurements techniques with physically based remote sensing ET estimates determined\nby the Atmosphere-Land Exchange Inverse (ALEXI) model. Evapotranspiration measurements\nand ALEXI estimates were analysed in an agricultural area close to Polkovice, Czech Republic during 2015,\nwhen a drought spell and intensive heatwaves appeared in the country. The BREB system was monitoring a\nwinter wheat (Triticum aestivum L.) field (~26 ha) while the ALEXI pixel (~5 km resolution) covered a wide\nrange of crops, including mainly winter wheat, spring barley, and winter rape. The study results showed that,\nalthough the applied methods work at different spatial scales (field vs. landscape), their combination can provide\nfurther insights into ET at both scales. For instance, such approach can be used to identify whether a specific\necosystem investigated in situ contributes to cooling or warming of the landscape.
Application of multispectral remote sensing indices for sensing indices for estimating crop yields at field level
Jurečka, František ; Lukas, Vojtěch ; Hlavinka, Petr ; Semerádová, Daniela ; Fischer, Milan ; Žalud, Zdeněk ; Trnka, Miroslav
Remote sensing can be used for yield estimation prior to harvest and can replace or complement classical\nways of estimating crop yields. This study was undertaken in Polkovice, located in the Czech Republic’s\nHaná region. For 2015 and 2016, two data sets of satellite imagery were used: the Moderate Resolution\nImaging Spectroradiometer and the Landsat 8. Vegetation indices from satellites were compared with crop\nyields at the level of land blocks. Winter wheat and spring barley yield data, representing crops planted\nover the analysed period, were used for the comparison. The results of the index–yield comparison showed\nthat vegetation indices from remote sensing data provide reliable information for yield estimation prior to\nharvest. Indices are also able to evaluate the spatial variability of a crop within the field. The results showed\nthat remote sensing data need to have detailed spatial resolution in order to provide reasonable information\nabout yield at such a detailed level.
The concept of fatherhood in the women's lifestyle magazines for different target groups defined by the level of women's income
Lukáš, Vojtěch ; Vochocová, Lenka (advisor) ; Bednařík, Petr (referee)
The thesis is focused on the role of fathers represented in different lifestyle magazines for women. There were selected two kinds of magazine brands for women from different social-economic groups. The representative magazines from higher social-economic groups were chosen Elle, Harper's Bazaar, Cosmopolitan and Marianne. The representative magazines for women from lower social-economic groups were chosen Vlasta, Chvilka pro tebe, Žena a život and Překvapení. There were found only articles which show man as father, including description, in all selected magazines. The terms were generated according to the method of open coding from each article. Then they were merged into superior categories. The final categories served as a tool for describing representation of father, as he had been described in the individual magazines. From individual magazines we moved to the whole groups of magazines, which were designed for the same social-economic groups of women. Differences and similarities in the representations of fathers were found not only between the groups but also inside of the groups themselves. Nevertheless, our work has successfully shown that there were significant differences in the descriptions of the father in the magazines for different social-economic groups of women.

National Repository of Grey Literature : 17 records found   1 - 10next  jump to record:
See also: similar author names
2 Lukas, V.
6 Lukas, Vojtěch
6 Lukáš, Vojtěch
1 Lukáš, Vykydal
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