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33542. Tornáda, víry a kvantová turbulence: aneb když pevná látka teče a víry se točí donekonečna
- Creator:
- Olivová, Jana
- Format:
- print, text, regular print, bez média, and svazek
- Type:
- article, články, journal articles, model:article, and TEXT
- Subject:
- Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, věda, fyzika, turbulentní proudění, science, physics, 12, and 00
- Language:
- Czech
- Description:
- Mikrosvět elementárních částic, atomů a procesů odehrávajících se mezi nimi je plný podivností. Částice může projít naráz dvěma různými štěrbinami, fotony mohou být navzájem provázané na obrovské vzdálenosti, kočka (alespoň ona pověstná Schrödingerova) může být zároveň živá i mrtvá... Může pozoruhodný kvantový svqt dovolit i stav, kdy by nějaká látka bya sočasně pevná a supratekutá? A mohou kvantové supratekuté systémy pomoci osvětlit jeden z posledních nevyřešených problémů klasické fyziky - turoblenci? Vědci, včetně českých, intenzivné hledají odpovědi. and Jana Olivová.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
33543. Tornádo 2021 v České republice - psychosociální pomoc IZS v zasažených oblastech
- Creator:
- Hoskovcová, Simona, Vymětal, Štěpán, and Wolf Čapková, Martina
- Format:
- počítač and online zdroj
- Type:
- model:article and TEXT
- Subject:
- psychosociální pomoc, psychologie krizí a katastrof, první psychická pomoc, krizová intervence, integrovaný záchranný systém, psychosocial support, crisis and disaster psychology, psychological first aid, crisis intervention, and integrated rescue system
- Language:
- Czech
- Description:
- Tornádo zasáhlo území několika obcí na jižní Moravě ve večerních hodinách ve čtvrtek 24. června 2021. Ačkoliv se jednalo o relativně malé území, rozsahem škod šlo o mimořádnou událost nevídaných rozměrů. Velké množství lidí se ocitlo v přímém ohrožení života svého a svých blízkých. V psychologii nazýváme takovou událost jako potenciálně traumatizující a ze zkušenosti víme, že může mít závažné dopady na lidskou psychiku. Článek má za cíl představit, jak fungoval systém psychosociální krizové pomoci a spolupráce zajišťovaný ze strany Integrovaného záchranného systému ČR, který tvořil jádro psychosociální pomoci v akutní fázi katastrofy. Je uvedena návaznost na další organizace, které mají svou funkci především ve fázi stabilizace, ve střednědobé a dlouhodobé péči o zasažené osoby. Považujeme také za potřebné zopakovat principy psychosociální pomoci při mimořádných událostech. and The tornado hit the territory of several municipalities in South Moravia in the evening on Thursday, June 24, 2021. Although it was a relatively small area, the extent of the damage was extraordinary and of unprecedented proportions. Many people found themselves in direct danger of themselves and their loved ones. In psychology, we call such an event potentially traumatic, and we know from experience that it can have serious effects on the human psyche. The article aims to present how the system of psychosocial crisis intervention and psychological first aid provided by the Integrated Rescue System of the Czech Republic worked. This psychosocial assistance in the acute phase of a disaster builds the core of psychosocial help. There is a link to other organizations, which have their function mainly in the stabilization phase, in the medium and long-term care of the affected persons. We also consider it necessary to repeat the principles of psychosocial assistance in emergencies.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
33544. Torsion of a bar with holes
- Creator:
- Franců, Jan and Rozehnalová-Nováčková, Petra
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- torsion of non-circular bar, Airy stress function, and profile with holes
- Language:
- English
- Description:
- The contribution is a continuation of [2] which deals with analytic solution of torsion of a bar with simply connected profile, i.e. profile without holes. In this paper the case of multiply connected profile, i.e. profile with holes, is studied. The stress-strain analysis leads to the Airy stress function Φ. On boundary of each hole the function Φ has prescribed an unknown constant value completed with an integral condition. The mathematical model is also derived from the variational principle. The second part of the paper contains solutions for the ring profile and for comparison also for incomplete ring profiles including the ‘broken‘ ring profile. The results are compared in tables and pictures. and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
33545. Torsion of a non-circular bar
- Creator:
- Franců, Jan, Nováčková, Petra, and Janíček, Přemysl
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- torsion of non-circular bar, Airy stress function, and rectangular profile
- Language:
- English
- Description:
- The contribution deals with strain-stress analysis of torsion of a non-circular bar. Mathematical model is exactly derived and solutions are introduced and visualised for cases of triangular, rectangular and some other profiles. and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
33546. Torsten Fischer: Ryby
- Creator:
- Hanel, Lubomír
- Type:
- article and TEXT
- Language:
- Czech
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/
33547. Toshihide Maskawa: Životopis: chlapec si přeje stát se vědcem
- Creator:
- Maskawa, Toshihide and Gregora, Ivan
- Format:
- print, bez média, and svazek
- Type:
- model:article and TEXT
- Subject:
- Masukawa, Toshihide, 1940-, 20.-21. století, fyzika elementárních částic, fyzici, elementary particle physics, physicists, Japonsko, Japan, japonští fyzici, 6, and 539
- Language:
- Czech
- Description:
- Toshihide Maskawa ; přeložil Ivan Gregora. and Obrázky
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
33548. Total body response to mechanical ventilation of healthy lungs: an experimental study in piglets
- Creator:
- Jiří Kobr, Fremuth, J., Kateřina Pizingerová, Šárka Fikrlová, Petr Jehlička, Honomichl, P., Lumír Šašek, Jaroslav Racek, and Ondřej Topolčan
- Format:
- Type:
- article, články, model:article, and TEXT
- Subject:
- Fyziologie člověka a srovnávací fyziologie, neurohumorální regulace, neurohumoral regulation, mechanical ventilation, inflammatory reaction, organ function, 14, and 612
- Language:
- English
- Description:
- The objective of our study was to assess the influence of mechanical ventilation on healthy body organs. Fifteen piglets (aged 6 weeks, 19-27 kg) were anesthetized, instrumented, and divided into three groups: Group A - spontaneously breathing, group B - mechanically ventilated with tidal volume 6 ml/kg, and group C - ventilated with tidal volume 10 ml/kg for 12 hours. The parameters of lung, heart, liver and kidney functions neurohumoral regulation and systemic inflammatory reaction were recorded initially (time-1) and after 12 hours (time-12) of mechanical ventilation. At the onset of experiment (time-1) the levels of soluble adhesive molecules were higher (CAM; P<0.01), glomerular filtration index and free water clearance were lower (P<0.05) in both ventilated groups than in group A. Right ventricle myocardial performance index was higher (RIMP; P<0.05) in group C when compared with group A. Levels of CAM (P<0.05) and creatinine clearance (P<0.01) were higher, free water clearance was lower (P<0.05) in group C when compared to group B. At time-12 the RIMP (P<0.05) and levels of CAM were increased (P<0.01), creatinine clearance was decreased (P<0.05) in both ventilated groups compared to the same parameter at time-1. Ventilation index was higher (P<0.05), and hypoxemic index was lower (P<0.01) in group C when compared to group B. In conclusion, this study showed that mechanical ventilation induced changes compatible with early inflammatory response in healthy animals. Higher tidal volumes had detrimental effect on ventilatory parameters, reduced myocardial performance and potentiated adverse reaction of other organs., J. Kobr ... [et al.]., and Obsahuje bibliografii a bibliografické odkazy
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
33549. Total carotenoid amount in crude twig extracts may be overestimated due to interference by high contents of co-extracted phenolics
- Creator:
- Levizou, E., Petropoulou, Y., and Manetas, Y.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Arbatus, HPLC, Pistacia, Populus, Prunus, and Quercus
- Language:
- Multiple languages
- Description:
- Total carotenoids assessed spectrophotometrically in crude extracts may be considerably overestimated when high contents of phenolic compounds are co-extracted. In this case, the absorbance tails of phenolics extend well into the blue part of the spectrum, interfering with carotenoid estimation. Extracts of phenolic-rich organs, with a low ratio of photosynthetic to heterotrophic and/or supportive cells (for example, stems or twigs) are vulnerable to such pitfalls and may need chromatographic separation of carotenoids. and E. Levizou, Y. Petropoulou, Y. Manetas.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
33550. Total β-adrenoceptor deficiency results in cardiac hypotrophy and negative inotropy
- Creator:
- Lee, S., Grafweg, S., Schneider, T., Jimenez, M., Giacobino, J.-P., Ghanem, A., Tiemann, K., Bloch, W., Müller-Ehmsen, J., Schwinger, R. H. G., and Brixius, K.
- Format:
- Type:
- article, články, model:article, and TEXT
- Subject:
- Fyziologie člověka a srovnávací fyziologie, kardiologie, cardiology, beta-1 adrenoceptor, beta-2 adrenoceptor, beta-3 adrenoceptor, knockout, mice, 14, and 612
- Language:
- English
- Description:
- The present study investigated cardiac function in hearts of mice with total deficiency of the β1-, β2- and β3-adrenoceptors (TKO) in comparison to wildtype mice (WT). We investigated cardiac morphology and echocardiographic function, measured protein expression of Ca2+-regulatory proteins, SERCA 2a activity, myofibrillar function, and performed running wheel tests. Heart weight and heart-to-body weight ratio were significantly smaller in TKO as compared to WT. This was accompanied by a decrease in the size of the cardiomyocytes in TKO. Heart rate and ejection fraction were significantly diminished in TKO as compared to WT. Protein expressions of SERCA 2a, ryanodine receptor and Na+/Ca2+-exchanger were similar in TKO and WT mice, but phospholamban protein expression was increased. PKAdependent phosphorylation of phospholamban at serine 16 was absent and CaMKII-dependent phosphorylation at threonine 17 was decreased in TKO. All alterations were paralleled by a decrease in SERCA 2a-activity. A similar maximal calciumdependent tension but an increased myofibrillar calciumsensitivity was measured in TKO as compared to WT. We did not observe relevant functional impairments of TKO in running wheel tests. In the absence of β-agonistic stimulation, SERCA 2a activity is mainly regulated by alterations of phospholamban expression and phosphorylation. The decreased SERCA 2a activity following β-adrenoceptor deficiency may be partly compensated by an increased myofibrillar calcium-sensitivity., S. Lee ... [et al.]., and Obsahuje bibliografii a bibliografické odkazy
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public