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30232. Středověká přírodovědná encyklopedie
- Creator:
- Hadravová, Alena
- Type:
- article, model:article, and TEXT
- Language:
- Czech
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
30233. Středověké podlahy s obrazem císaře Nerona
- Creator:
- Merhautová, Anežka
- Format:
- Type:
- model:internalpart and TEXT
- Language:
- Czech
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
30234. Středověké rukopisy z knihovny hrabat von Manderscheid-Blankenheim dochované ve fondu Národní knihovny České republiky
- Creator:
- Svobodová, Milada
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- aristocratic libraries, Rhineland, and medieval manuscripts
- Language:
- Multiple languages
- Description:
- The library of the Counts von Manderscheid-Blankenheim at Blankenheim Castle vas established in the 1470s and closed after Napoleon's army invaded the Rhineland in 1794. The last owner of the castle, Augusta von Sternberg-Manderscheid, probably took some of the books to the Sternberg Palace in Prague. After the sale of the Sternberg library in 1830, it was incorporated into the Lobkowicz princes Prague palace library, with which it was incorporated into the National Library of the Czech Republic fonds in 1928. The present study presents the results of research into the manuscript fonds of the Prague Lobkowicz library, which was based on the discovered Lobkowicz list of purchased Sternberg manuscripts. It presents a total of seven manuscripts of Blankenheim origin from the first half of the 13th century to the first half of the 16th century.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
30235. Středověké umění v sociálních a mocenských souřadnicích
- Creator:
- Čornej, Petr
- Format:
- Type:
- model:internalpart and TEXT
- Language:
- Czech
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
30236. Středovýchodní studia v USA - rizikové povolání?
- Creator:
- Dobbs, MIchael
- Format:
- Type:
- model:internalpart and TEXT
- Language:
- Czech
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
30237. Streptozotocin Induces Lipolysis in Rat Adipocytes in Vitro
- Creator:
- Szkudelski, T. and Szkudelska, K.
- Format:
- print, bez média, and svazek
- Type:
- article, studie, model:article, and TEXT
- Subject:
- Fyziologie člověka a srovnávací fyziologie, fyziologie člověka, human physiology, Adipocytes, Streptozotocin, Lipolysis, 14, and 612
- Language:
- English
- Description:
- Streptozotocin (STZ) is used to induce experimental diabetes in animals and is also applied for the treatment of patients with insulinoma. The aim of the present work was to investigate the direct effect of STZ on lipolysis in isolated rat adipocytes. After the isolation, the cells were incubated in a Krebs-Ringer buffer of pH 7.4, at the temperature 37 °C for 90 min with different concentrations of STZ: 0.5, 1 or 2 mmol/l. STZ caused a significant rise in basal values (99 %, 199 %, and 377 %, respectively) and epinephrine-stimulated (1 µmol/l) lipolysis (15 %, 24 % and 46 %, respectively). Augmentation of basal lipolysis by STZ was neither restricted by insulin (1 nmol/l) nor by H-89 (an inhibitor of protein kinase A, 50 µmol/l). These results indicate the stimulatory influence of STZ on the action of hormone-sensitive lipase in isolated cells of white adipose tissue. The obtained outcomes suggest that in studies employing STZ, it is necessary to consider its direct effect upon lipolysis in adipocytes., T. Szkudelski, K. Szkudelska., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
30238. Stresory ve škole z pohledu učitelů a jejich souvislosti s individuálními charakteristikami a vyhořením
- Creator:
- Vorlíček, Radek, Kollerová, Lenka, Janošová, Pavlína, and Jungwirthová, Rút
- Format:
- počítač and online zdroj
- Type:
- model:article and TEXT
- Subject:
- job demands-resources model, educational psychology, stressor, schools, teachers, model pracovních nároků a zdrojů, pedagogická psychologie, stresor, školy, and učitelé
- Language:
- Czech
- Description:
- Objectives. Teaching is a stressful job, but it is not clear what stressors teachers perceive at school and how these perceptions are associated with teacher characteristics and burnout.Sample and setting. The data were collected from 594 teachers of 6th to 9th grades from 118 schools. In an online survey, participants an-swered an open-ended question about what they perceive as the most important problems at school, and they filled a burnout scale.Questions and hypotheses. The study described types of stressors that teachers perceive. Then, it verified whether stressors and their number reported by teachers associate with gender, so-cio-economic status (SES), teaching experience, and burnout.Analyses. A mixed design was used. Stressors were identified using thematic analysis and re-lationships were verified using statistical tests.Results. The stressors found were as follows: problematic relationships with student,s parents (31%), student inappropriate behaviors (29%), non-functioning policies (27%), student lack of motivation (23%), underappreciation of educa-tion (22%), administrative overload (22%), im-proper parenting (17%), poorly handled inclu-sion (13%), and unfavorable collegial climate (8%). On average, teachers mentioned two stressors. Women more often reported student inappropriate behaviors. SES proved no signifi-cant effects. More experienced teachers less of-ten mentioned student inappropriate behaviors and unfavorable collegial climate and reported a lower number of stressors. Teachers with higher level of burnout more often complained about problematic relationships with parents and re-ported a higher number of stressors.Limitations. Although the generalizability of the results may be limited to 6th to 9th grade teachers in the Czech Republic, the study brings novel insights into the demands of teaching. and Cíle. Učitelství je považováno za stresující po-volání, ale dosud nebylo zkoumáno, jak stresory ve školách vnímají samotní učitelé a zda souvisí s jejich individuálními charakteristikami a vy-hořením.Soubor a metody. Výzkumu se zúčastnilo 594 učitelů 6.–9. ročníků ze 118 škol. Účastníci v online dotazníku odpověděli na otevřenou otázku, co považují za nejdůležitější problémy, se kterými se ve škole potýkají, a vyplnili škálu měřící vyhoření.Otázky a hypotézy. Výzkum zachytil, jaké typy stresorů ve škole učitelé vnímají. Poté ověřoval, zda jednotlivé stresory a jejich počet souvisí s pohlavím, socioekonomickým statusem, dél-kou praxe a vyhořením učitele.Analýzy. Použitý byl smíšený výzkumný design. Stresory byly identifikovány tematickou analý-zou a souvislosti mezi proměnnými byly ověřo-vány pomocí statistických testů.Výsledky. Učitelé považují za stresory ve škole tyto oblasti: problematické vztahy s rodiči žáků (31 %), nevhodné chování žáků (29 %), ne-funkční koncepce (27 %), nemotivovanost žáků (23 %), nedoceněnost školství (22 %), zahlcení administrativou (22 %), špatnou rodičovskou výchovu (17 %), nezvládnutou inkluzi (13 %) a nekolegiální klima (8 %). Ve svých odpově-dích zmiňovali průměrně dvě oblasti. Ženy si častěji než muži stěžovaly na nevhodné chování žáků. Socioekonomický status s vnímáním stre-sorů nesouvisel. Učitelé s delší praxí si méně často stěžovali na nevhodné chování žáků a ne-kolegiální klima a uváděli menší počet stresorů. Učitelé s vyšší mírou vyhoření uváděli častěji problematické vztahy s rodiči a vyšší počet stre-sorů.Limity. Přestože může být zobecnitelnost vý-sledků studie omezena na populaci učitelů 6.– 9. ročníků v ČR, výzkum přináší nové vhledy do nároků učitelské profese.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
30239. Stress analysis of the hip joint endoprosthesis with shape deflections
- Creator:
- Fuis, Vladimír and Návrat, Tomáš
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- computational modelling, hip joint endoprosthesis, micro-unevenness modelling, stress and failure probability analyses, and Weibull weakest link theory
- Language:
- English
- Description:
- The paper deals with the problems of ceramic head of hip joint endoprosthesis destructions, and with assessing the impact of shape deflections of conical surfaces on the probability of this failure. Concerned are shape deflections from the ideal conical surfaces of the stem and the head of the endoprosthesis, which - when the head is put on the stem and the endoprosthesis loaded - form a contact configuration. The shape deflections may be modelled at the macro-level - this concerns model shape inaccuracies such as deflection from the nominal degree of taper, ovality, and their combination, or, possibly, at the micro-level - when the stochastic distribution of unevenness on the contact areas is respected. The problem of stress in ceramic heads was solved using the algorithm of the finite element metod for spatial contact tasks, and the Weibull probability model was used for solving the problem of head cohesion failure probability. In the paper are presented and analysed the results of solution of the micro-level shape deflections, obtained from measurements made on the cones of stems and heads.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
30240. Stress analysis of the radial head replacements in an elbow articulation
- Creator:
- Hlavoň, Pavel, Fuis, Vladimír, and Florian, Zdeněk
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- elbow joint, elbow articulation, FEM, radial head replacement, partial radio-humeral alloplasty, contact stress, and computational modelling
- Language:
- English
- Description:
- The paper is focused on computational modeling of elbow articulation with radial head replacement. The main part of the project is aimed towards the creation of computational model of suitable partial endoprothesis of proximal part of the radial bone tissue which would keep the function of the elbow articulation while replacing the distance created by resection. The geometrical and computational models of radial head replacements and elbow joint were created. Computational models with these implants were compared with given physiological state of elbow articulation. The influence of friction and material characteristics of bone tissue and cartilage on changes in contact pressure (and therefore to the abrasion) were analyzed using those models. and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public