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2. Bifurcation and chaos in electromenchanical drive sysstems with small MPTPRS
- Creator:
- Houfek, Lubomír, Houfek, Martin, Krejsa, Jiří, Kratochvíl, Ctirad, Koláčný, Josef, and Nykodým, Pavel
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- chaos, drive systems, bifurcation, and attractor
- Language:
- English
- Description:
- The purpose of this article is to provide an elementary introduction to the subject of chaos in the electromechanical drive systems with small MPTPRS. In this article, we explore chaotic solutions of maps and continuous time systems. These solutions are also bounded like equilibrium, periodic and quasiperiodic solutions. and POZOR! Nadpis obsahuje dvě chyby (překlepy - správně je: electromechanical (tj. vypustit chybné n) + systems (tj. vypustit druhé chybné s)
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3. MODIS-based multi-parametric platform for mapping of flood affected areas.: case study: 2006 Danube extreme flood in Romania
- Creator:
- Craciunescu, Vasile, Stancalie, Gheorghe, Irimescu, Anisoara, Catana, Simona, Mihailescu, Denis, Nertan, Argentina, Morcov, George, and Constantinescu, Stefan
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- flood extent mapping, MODIS, web services, and 2006 Danube flood
- Language:
- Slovak
- Description:
- Flooding remains the most widely distributed natural hazard in Europe, leading to significant economic and social impact. Earth observation data is presently capable of making fundamental contributions towards reducing the detrimental effects of extreme floods. Technological advance makes development of online services able to process high volumes of satellite data without the need of dedicated desktop software licenses possible. The main objective of the case study is to present and evaluate a methodology for mapping of flooded areas based on MODIS satellite images derived indices and using state-of-the-art geospatial web services. The methodology and the developed platform were tested with data for the historical flood event that affected the Danube floodplain in 2006 in Romania. The results proved that, despite the relative coarse resolution, MODIS data is very useful for mapping the development flooded area in large plain floods. Moreover it was shown, that the possibility to adapt and combine the existing global algorithms for flood detection to fit the local conditions is extremely important to obtain accurate results.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
4. Photosynthetic limitations caused by different rates of water-deficit induction in Glycine max and Vigna unguiculata
- Creator:
- Bertolli, S. C., Rapchan, G. L., and Souza, G. M.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- botanika, botany, cowpea, photosynthesis, rapid and slow water-deficit induction, recovery, soybean, 2, and 58
- Language:
- Multiple languages
- Description:
- Plants are constantly subjected to variations in their surrounding environment, which affect their functioning in different ways. The influence of environmental factors on the physiology of plants depends on several factors including the intensity, duration and frequency of the variation of the external stimulus. Water deficit is one of the main limiting factors for agricultural production worldwide and affects many physiological processes in plants. The aim of this study was to analyse the effects of different rates of induced water deficit on the leaf photosynthetic responses of soybean (Glycine max L.) and cowpea (Vigna unguiculata L.). The plants were subjected to two types of water deficit induction: a rapid induction (RD) by which detached leaves were dehydrated by the exposure to air under controlled conditions and a slow induction (SD) by suspending irrigation under greenhouse conditions. The leaf gas exchange, chlorophyll (Chl) a fluorescence, and relative water content (RWC) were analysed throughout the water-deficit induction. V. unguiculata and G. max demonstrated similar dehydration as the soil water percentage declined under SD, with V. unguiculata showing a greater stomatal sensitivity to reductions in the RWC. V. unguiculata plants were more sensitive to water deficit, as determined by all of the physiological parameters when subjected to RD, and the net photosynthetic rate (PN) was sharply reduced in the early stages of dehydration. After the plants exposed to the SD treatment were rehydrated, V. unguiculata recovered 65% of the PN in relation to the values measured under the control conditions (initial watering state), whereas G. max recovered only 10% of the PN. Thus, the better stomatal control of V. unguiculata could enable the maintenance of the RWC and a more efficient recovery of the PN than G. max., S. C. Bertolli, G. L. Rapchan, and G..M. Souza., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public