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782. A / Věda a výzkum
- Type:
- model:periodicalitem and TEXT
- Language:
- Czech
- Description:
- 2
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
783. A / Věda a výzkum
- Type:
- issue, normal, model:periodicalitem, and TEXT
- Language:
- Czech
- Description:
- 2
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
784. A 15,000-year history of Early Upper Paleolithic hunters moving through the Pustý Žleb valley - Artefacts and chronology of Pod Hradem Cave, Moravian Karst, Czech Republic
- Creator:
- Nejman, Ladislav, Škrdla, Petr, Wright, Duncan, Bartík, Jaroslav, and Přichystal, Antonín
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Middle-Upper Paleolithic transition, chronostratigraphy, stone artefacts, and EUP cultures
- Language:
- Czech
- Description:
- Archaeological evidence shows that Paleolithic hunters occasionally used the difficult-to-access Pod Hradem Cave for short-term visits. The small collection of artefacts spanning a c. 15,000-year period were made from a range of different raw materials collected from known sources in the surrounding regions up to 120 km away. In this paper, we interpret the sum of the archaeological evidence associated with artefacts from Pod Hradem Cave against an updated chronology, and report a previously unpublished stone artefact. Combined, this information suggests variable cave use throughout the site history. During the Early-Upper Paleolithic this likely involved visits by small, mobile bands using Pod Hradem Cave as a short stop over while passing through the Pustý Žleb valley.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
785. A 33-35 kDa circulating antigen from Plasmodium falciparum
- Creator:
- Dominguez, de Neira and Rodriguez-Acosta, Alexis
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Plasmodium falciparum, soluble antigens, malaria, excretion antigens, hyperimmune serum, and thermal stability
- Language:
- English
- Description:
- Isolation and characterisation of Plasmodium falciparum (Welch, 1897) soluble antigens from infected patient plasma, Western blotting, thermal stability and ELISA assays using hyperimmune IgG-antimalaria antibodies was the main objective of this work. A circulating antigen of approximately Mr 33-35 kDa with good specificity and antigenicity, in the plasma of malarial patients was shown. Heating at 100°C did not destroy its antigenicity. When fractions highly enriched in the 33-35 kDa proteins were used in ELISAs, a seroreactivity in plasma obtained from primary-infected individuals was found. Controls from normal patients were always negative. The antigenic characteristics suggest that it may be included within the group of new described Plasmodium soluble antigens.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
786. A bibliometric analysis of research papers published on photosynthesis: 1992-2009
- Creator:
- Yu, J. J., Wang, M. H., Xu, M., and Ho, Y. S.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- bibliometrie, bibliometrics, author keyword, research trend, scientometrics, science citation index expanded, 12, and 00
- Language:
- Multiple languages
- Description:
- We present here a bibliometric analysis of publications on photosynthesis research from 1992 to 2009 in the Science Citation Index Expanded (SCI-Expanded) Web of Science. This has allowed us to examine the growing trends and the key topics on this subject. We have assessed the document type, language of the publications, publication output, subject category, journal distribution, countries and territories of these publications, institutions involved, hot topics and highly cited papers. The top 30 countries/territories were ranked according to their total number of articles (TA), single country articles (SCA), internationally collaborative articles (ICA), first author articles (FAA) and corresponding author articles (CAA). Research directions on the subject of photosynthesis were also investigated and evaluated by statistically analyzing the distribution of author keywords in the database. Our analysis indicates that “water”, “stress”, “carbon dioxide”, “nitrogen” and “climate change” are hot topics of research on photosynthesis during this period., J. J. Yu ... [et al.]., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
787. A British view of the Czech right
- Creator:
- Gjuričová, Adéla
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- English
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
788. A calibration-free evapotranspiration mapping technique for spatially-distributed regional-scale hydrologic modeling
- Creator:
- Szilágyi, József and Kovács, Ákos
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- spatially distributed evapotranspiration, complementary relationship of Evaporation, MODIS data, priestorové rozdelenie evapotranspirácie, komplementárny vzťah pre evapotranspiráciu, and údaje MODIS
- Language:
- Slovak
- Description:
- Monthly evapotranspiration (ET) rates over Hungary for 2000-2008 are mapped at a spatial scale of about 1 km with the help of MODIS daytime land surface temperature as well as sunshine duration, air temperature and humidity data. Mapping is achieved by a linear transformation of MODIS daytime land surface temperature values employing the complementary relationship of evaporation. Validation of the ET rates has been performed at spatial scales spanning almost three magnitudes from a few hundred meters to about a hundred kilometers employing eddy-covariance (EC) measurements and catchment water balance closures. Typically the unbiased ET estimates are within 15 % of EC values at a monthly basis, within 7 % at an annual, and within only a few percent at a multi-year basis. The ET estimates yield an especially remarkable match (relative error of 0.2 %, R2 = 0.95) with high-tower EC measurements at a monthly basis. The spatial distribution of the ET estimates confirm earlier, complex regional hydrologic model results and observations as well as yields a perfect estimate of the country’s precipitation recycling index (the ratio of the multi-year mean ET and precipitation rates spatially aggregated for the whole country) of 89.2 % vs an observed value of 89.6 %. The CREMAP method is very simple, easy to implement, requires minimal data, calibration-free, and works accurately when conditions for the complementary relationship are met. and Pomocou údajov ročlenených podľa MODIS (moderate resolution imaging spectroradiometer), s využitím dennej povrchovej teploty, trvania slnečného svitu, teploty vzduchu a jeho vlhkosti boli zostrojené mapy mesačnej evapotranspirácie (ET) Maďarska pre roky 2000-2008 s priestorovým rozlíšením približne 1 km. Mapovanie bolo zrealizované lineárnou transformáciou MODIS dennej teploty povrchu s uvážením doplňujúceho vzťahu pre evapotranspiráciu CR, navrhnutou Bouchetom (1963). Výsledky dosiahnuté touto metódou boli verifikované v priestorovej mierke pokrývajúcej tri rády od niekoľkých stoviek metrov po stovky kilometrov, použijúc merania metódou pulzácií (eddy covariance, EC), a bilanciou vody v koncovom profile povodí. Typicky, hodnoty ET sú v medziach 15 % mesačných hodnôt EC a 7 % ročných hodnôt a len v medziach niekoľkých percent viacročných hodnôt evapotranspirácie, ktoré boli určené inými metódami. Hodnoty ET sú v dobrej zhode s výsledkami meraní ET na vysokej veži metódou EC (relatívna chyba 0.2 %, R2 = 0,95). Priestorové rozdelenia vypočítaných hodnôt ET potvrdzujú predchádzajúce výsledky modelovania regionálnymi modelmi, ako aj hodnoty indexu recyklácie zrážok krajiny (precipitation recycling index), čo je pomer mnohoročnej priemernej ET a zrážok agregovaných v krajine, s hodnotou 89,2 % vs pozorovaná hodnota 89,6 %. Metóda CREMAP je jednoduchá, ľahko implementovateľná, vyžaduje minimum vstupných hodnôt, nie je ju potrebné kalibrovať a keď sú splnené podmienky jej použiteľnosti, je aj dostatočne presná.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
789. A case study of Heleomyzidae (Diptera) recorded on snow in Poland with a review of their winter activity in Europe
- Creator:
- Soszńska-Maj, Agnieszka and Woźnica, Andrzej J.
- Format:
- print, počítač, and online zdroj
- Type:
- article, články, journal articles, model:article, and TEXT
- Subject:
- Zoologie, dvoukřídlí, fenologie, Diptera, phenology, Evropa, Polsko, Europe, Poland, Heleomyzidae, winter activity, snow fauna, 2, and 59
- Language:
- English
- Description:
- Twenty eight species of winter-active Heleomyzidae were collected during a long-term study in Poland. More than 130 samples of insects, including Heleomyzidae, were collected from the surface of snow in lowland and mountain areas using a semi-quantitative method. Lowland and mountain assemblages of Heleomyzidae recorded on snow were quite different. Heleomyza modesta (Meigen, 1835) and Scoliocentra (Leriola) brachypterna (Loew, 1873) dominated in the mountains, Tephrochlamys rufiventris (Meigen, 1830) mainly in the lowlands and Heteromyza rotundicornis (Zetterstedt, 1846) was common in both habitats. Heleomyzidae were found on snow during the whole period of snow cover, but the catches peaked from late November to the beginning of February. In late winter and early spring the occurrence of heleomyzids on snow decreased. Most individuals were active on snow at air temperatures between -2 and +2.5°C. A checklist of 78 winter active European Heleomyzidae is presented. Helomyza nivalis Wahlgren, 1918 is herein considered as a new junior synonym of Helomyza caesia Meigen, 1830, syn. n., Agnieszka Soszyńska-Maj, Andrzej J. Woźnica., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
790. A causal-mentalist view of propositions
- Creator:
- Joaquin, Jeremiah Joven B. and Franklin, James
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- propositions, causal-mentalist view, cluster analysis, game theory, perception algorithms, Platonism, and symbol grounding
- Language:
- Slovak
- Description:
- In order to fulfil their essential roles as the bearers of truth and the relata of logical relations, propositions must be public and shareable. That requirement has favoured Platonist and other non-mental views of them, despite the well-known problems of Platonism in general. Views that propositions are mental entities have correspondingly fallen out of favour, as they have difficulty in explaining how propositions could have shareable, objective properties. We revive a mentalist view of propositions, inspired by Artificial Intelligence work on perceptual algorithms, which shows how perception causes persistent mental entities with shareable properties that allow them to fulfil the traditional roles of (one core kind of) propositions. The clustering algorithms implemented in perception produce outputs which are (implicit) atomic propositions in different minds. Coordination of them across minds proceeds by game-theoretic processes of communication. The account does not rely on any unexplained notions such as mental content, representation, or correspondence (although those notions are applicable in philosophical analysis of the result).
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public