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2272. Archivace sociologických dat

Creator:
Vávra, Martin
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
sociologický výzkum, sociologická data, datové archivy, archivace dokumentů, records retention, sociological research, archives, archivace dat, archivy sociálních dat, standard DDI, 316:303, 316:004.6, 005.921.1, 23, and 004.4/.6
Language:
Czech
Description:
Cílem článku je podat přehled o problematice archivace sociologických dat. Článek se zabývá archivací z několika úhlů pohledu. Rozebírá její význam pro vědeckou práci a místo archivů v „cyklu oběhu dat“. Následně se věnuje přípravě dat pro archivaci - nárokům, které z toho plynou jak pro výzkumníky, tak i pro pracovníky archivů. V další části je rozebrán standard DDI jakožto nástroj vhodný pro popis (nejen) sociologických dat., Martin Vávra., 1 schéma, and Obsahuje bibliografii
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2275. Archivy sociálních dat jako informační a výukové zdroje

Creator:
Čížek, Tomáš
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
sociologická data, datové archivy, digitální repozitáře, výukový software, digital archives, educational software, Economic and Social Data Service (Velká Británie), Inter-University Consortium for Political and Social Research (USA), 316:004.6, 930.25:004.08, 371.68-028.23, 23, and 004.4/.6
Language:
Czech
Description:
Tomáš Čížek. and 4 obrázky
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2276. Arcona

Creator:
Zikoff, Friedrich
Format:
bez média and 10 instrumentálních partů (10 stran)
Type:
model:sheetmusic, notated music, and TEXT
Subject:
udc:785, Konspekt:9, udc:78.084, udc:(0.032)78, Konspekt:Instrumentální hudba. Symfonická hudba. Hudba pro více nástrojů., 19. století, and pochody
Language:
No linguistic content
Description:
(Statement of Responsibility) Friedrich Zikoff, Violino 1, Violinio 2, Viola, Bassa, Flauto, Clarinett A, Clarinett C, Tromba 1 F, Tromba 2 F, Trombon, (Ownership) Provenience: Klášter minoritů Český Krumlov CZ-CbJVK, and (Version Identification) B 48 CZ-CbJVK
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2277. Are Acute Changes After Status Epilepticus in Immature Rats Persistent?

Creator:
Suchomelová, L., Hana Kubová, Renata Haugvicová, Rastislav Druga, and Pavel Mareš
Format:
print, bez média, and svazek
Type:
article, studie, model:article, and TEXT
Subject:
Fyziologie člověka a srovnávací fyziologie, fyziologie člověka, human physiology, Status epilepticus, Rat, Development, EEG, Behavior, Histology, Motor performance, 14, and 612
Language:
English
Description:
Early consequences of lithium-pilocarpine convulsive status epilepticus (SE) were studied six days after this status had been induced in rat pups at the age of either 12 or 25 days. Studies of spontaneous EEG activity demonstrated the presence of epileptic phenomena (isolated spikes) in both hippocampus and cortex (cortical spikes were more expressed in the older group). There were no marked behavioral correlates of spikes and transition into the ictal phase was exceptional. The motor performance on a rotorod and a horizontal bar was the same in experimental and control rats of both ages. Behavior in the open field was changed in a reverse manner in the two age groups: the locomotor activity of rats with induced seizures at the age of 12 days was significantly lower than that of their control siblings, whereas animals undergoing status at the age of 25 days were hyperactive. In addition, they also exhibited increased exploratory activity (rearing) and their habituation to the open field was deranged. Nissl-stained brain sections demonstrated extensive brain damage in the older group in contrast to the negative findings in younger animals. EEG, behavioral and morphological changes induced by status epilepticus in developing rats persisted for 6 days after the status. They markedly differed according to the age of animals., L. Suchomelová, H. Kubová, R. Haugvicová, R. Druga, P. Mareš., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

2278. Are calcium ions and calcium channels involved in the mechanisms of Cu2+ toxicity in bean plants? The influence of leaf age

Creator:
Maksymiec, W. and Baszyński, T.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
chlorophyll fluorescence, copper, lanthanum, Phaseolus coccineus, photosystem 2, senescence, toxicity, and verapamil
Language:
Multiple languages
Description:
The influence of calcium channel blockers and ionophore on Cu2+-induced changes of the photosynthetic activity of runner bean plants (Phaseolus coccineus L.) was investigated. Excess Cu2+ was applied to leaves by injection or via the roots to examine a short/local or a long time/systemic effect of this metal, respectively. The changes in fluorescence parameters indicated that the mechanism of toxic action of Cu2+ ions on the photosynthetic apparatus was only partially connected with Ca2+ or Ca2+ channels. In young plants Ca2+ diminished especially photochemical and nonphotochemical dissipative processes induced by short- and long-term influence of excess Cu2+. Blocking of Ca2+ channels did not change direct Cu2+ action on the photosynthetic activity, however, their opening distinctly intensified the inhibitory effect of the metal. After a longer accumulation peri od the effect of Cu2+ ions did not change significantly due to modified Ca2+ penetration through membranes (except that caused by La3+). Copper directly introduced into older leaves diminished only at its highest concentration the activity both of the donor and acceptor sides of photosystem 2 (PS2) connected with Rfd decrease and increase of LNU. A similar effect was observed also after a long-term Cu2+ action, but disturbances on the acceptor side of PS2 were observed only at a higher Ca2+ content in the nutrient solution. Ca2+ ions, particularly after openning of channels, intensified direct inhibitory Cu2+ action on the photosynthetic activity expressed by decreased values of Fv/F0 and Rfd. Lanthanum and verapamil, at a lower Ca2+ content in the medium, decreased the photosynthetic activity of Cu2+-treated plants. This effect was also seen after additional Ca2+ supply to the leaves. and W. Maksymiec, T. Baszyński.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

2279. Are cometary dust Mars loss rates deduced from optical emissions reliable?

Creator:
Crifo, J. F.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astrophysics, Comet Halley, and cometary dust
Language:
Czech
Description:
We present additional evidence in support of our prevlous work (Crifo, 1987 bc) in which, from theoretical fits to Comet Halley near -to far- infrared emissions, based on the in-situ flyby probes data, we estimated that the comet was losing half or more of its mass under the form of large (> 1 gram) grains of small (0.3 g cm-^3) density. We confirm that the comet dust-to-gas mass loss rate ratio lies somewhere between the values 0.80 and 18.6, with a best estimate at 3.46. We discuss this result in the context of the general agreement that comets loose less than half of their total mass loss in dust, and this dominantly at very smáli grain sizes. We trace this agreement back to overconfidence placed in a model size distribution which inherently excludes substantial mass loss in large grains without appropriate experimental justification.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2280. Are diurnal fluctuations in streamflow real?

Creator:
Cuevas, Jaime G., Calvo, Matías, Little, Christian, Pino, Mario, and Dassori, Paul
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
iInstrumental analysis, methodological artifacts, southern rainforests, stream and air temperatures, inštrumentálna analýza, metodologické artefakty, južné dažďové pralesy, and teploty vzduchu a vody
Language:
Slovak
Description:
Diurnal variations in streamflow (DVS) have been studied in detail by underwater pressure loggers. Some of this equipment requires barometric compensation with a logger or sensor located outside the water. Studies related to this topic have not offered a critical report of the validity of patterns inferred with these instruments. While studying a forested watershed in Southern Chile (40° S), we detected a DVS when the external logger was placed 1.5 m above ground, under a marked diurnal fluctuation in air temperature (amplitude 12.4 °C) and a dampened fluctuation in stream temperature (amplitude 1.4 °C). Synchronization was apparent between air and stream temperature in a direct relationship, but the synchronization between air/stream temperature and streamflow was negative, with some hours of lag time. In laboratory experiments, when the external logger is considerably warmer than the water-level logger, depth measurements can be underestimated by up to 1.5 cm. When the opposite occurs, water depths can be overestimated by up to 0.9 cm and are large instrumental/methodological artifacts compared to the field water diurnal variation of 1.3 cm. Finally, we relocated the external logger in front of the water-level logger and inside a weir, but exposed to the air. Results confirmed the pattern previously detected in the field, but streamflow fluctuations were 19% less accentuated. We conclude that the incorrect placement of the external logger, along with an instrumental artifact, can intensify a DVS pattern. and Počas dňa sme podrobne sledovali zmeny prietokov v tokoch tlakovými snímačmi, umiestnenými pod vodou. Niektoré z týchto zariadení vyžadujú barometrickú kompenzáciu snímačov, ktoré nie sú umiestnené vo vode. Štúdie z tejto oblasti obyčajne nehodnotia kriticky správnosť výsledkov meraní týmito zariadeniami. Počas meraní v zalesnenom povodí na juhu Chile (40° S), sme zistili zmeny prietokov v tokoch počas dňa, ak bol externý tlakový snímač (logger) uložený 1,5 m nad zemou, počas výrazných denných zmien teploty vzduchu (amplitúda 12.4 °C) a stlmené fluktuácie teploty vody v toku (amplitúda 1.4 °C). Synchronizácia medzi teplotami vody a vzduchu bola zrejmá, ale synchronizácia medzi teplotami vody v toku a prietokmi bola negatívna, s hodinovými posunmi voči sebe. V experimentoch v laboratóriu, keď bol externý snímač podstatne teplejší ako snímač vo vode, meranie hĺbok bolo podhodnotené až o 1,5 cm. V opačnom prípade, hĺbka hladiny vody bola nadhodnotená až o 0,9 cm a boli zistené významné inštrumentálne/metodologické artefakty v porovnaní s poľnými meraniami až o 1,3 cm. Nakoniec, externý snímač bol umiestnený pred snímač s údajmi o vodnej hladine a dovnútra prepadu, ale bol vo vzduchu. Výsledky meraní potvrdili chody prietokov namerané v teréne, ale fluktuácie prietokov boli nižšie o 19 %. Z toho vyplýva, že nesprávne umiestnenie externého snímača, spolu s prístrojovými artefaktmi, môžu intenzifikovať zmeny prietokov v tokoch počas dňa.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

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