Hard X-ray spectra and positions of solar flares observed by RHESSI: photospheric albedo, directivity and electron spectra

<p><b>Aims</b>: We investigate the signature of the photospheric albedo contribution in solar flare hard X-ray spectra, the effect of low energy cutoffs in electron spectra, and the directivity of hard X-ray emission.</p> <p><b>Methods</b>: Using Ramaty High Energy Solar Spectroscopic Imager (RHESSI) flare data we perform a statistical analysis of spatially integrated spectra and positions of solar flares.</p> <p><b>Results</b>: We demonstrate clear centre-to-limb variation of photon spectral indices in the 15-20 keV energy range and a weaker dependency in the 20-50 keV range which is consistent with photospheric albedo as the cause. The results also suggest that low-energy cutoffs sometimes inferred in mean electron spectra are an artefact of albedo. We also derive the anisotropy (ratio of downward/observer directed photons) of hard X-ray emission in the 15-20 keV range for various heliocentric angles.</p&gt

Presentation Software - Triangle Basic Facts

Tato bakalářská práce se věnuje vývoji prezentačního softwaru pro podporu výuky matematiky - základní geometrické jevy v trojúhelníku. Připomíná základní poznatky o výuce a trojúhelnících. Ve druhé části se potom zabývá návrhem a implementací programu a nástroji použitými při jeho vývoji.This bachelor's thesis is about development of presentation software supporting teaching of mathematics - triangle basic geometrical facts. It suggests basic knowledge about education and triangles. The second part is about analysis and implementation of the program and tools that were applied in its development.

Children, work and education: first steps to unschooling as a result of current institutional child-care crisis in the Czech Republic

Rodiče, a v kontextu ČR především ženy, které se vrací po rodičovské dovolené zpět do práce zažívají v posledních letech nemilé situace, kdy jejich dítě není z kapacitních důvodů přijato do mateřské školy. Nastalou situaci je možno řešit několika způsoby, od privátní péče o dítě, přes výpomoc prarodičů až k přehodnocení současného životního stylu a snahy o skloubení péče o děti s vlastním povoláním. Možné řešení v tomto smyslu představuje forma domácího vzdělávání v zahraničí běžně označovaná jako unschooling. Autorka představuje toto alternativní vzdělávací hnutí v kontextu České republiky.For several years, Czech mothers of young children have faced the same dilemma: their child, due to low capacity, was not accepted in a state Kindergarten and the family has to decide what to do next. Only few alternatives to a state-run pre-school day care exist in the Czech Republic, yet women are expected and willing to work. The conflict between paid work and family life is emphasized in academic as well as public debates and women are pressurized to choose either work or care/family. Alongside semi-permanent alternatives to Kindergarten child care, several families solve their situation on the permanent basis and opt for the life strategy of unschooling, rooted in the belief in symbiosis of family life, education of the children and paid work of the parents. Paper explores and for the first time ever describes unschooling as practiced in the conditions of the Czech Republic. It introduces the individual education right, under which the Czech parents can practice homeschooling. Key theoretical concepts applied are the habitus and cultural capital of P. Bourdieu, cultural theories of B. Pfau-Effinger and preference theories of C. Hakim.. It also lays out propositions for a primary research, as planned to take place in the following years

How to educate Czech children: social network as a space of parental ethnotheories

Article introduces original research on parental ethnotheories, that are negotiated by Czech parents in four most frequently visited social networks and chat-forums, regarding learning and schooling processes of their children in current Czech society.Článek představuje původní výzkum rodičovských etnoteorií, tak jak jsou vyjednávany na čtyřech nejnavštěvovanějších sociálních sítích a fórech. Etnoteorie se týkají způsobu a míry vzdělávání dětí, jakož i samotného postavení rodičů ve vzdělávacím procesu.Article introduces original research on parental ethnotheories, that are negotiated by Czech parents in four most frequently visited social networks and chat-forums, regarding learning and schooling processes of their children in current Czech society

Measuring the Deceleration of Trucks up to 12 Tons of Weight with the Use of Engine Braking

Tato diplomová práce se zabývá brzdnými účinky motoru nákladních vozidel. Teoretická část čtenáře seznamuje se základní konstrukcí nákladních vozidel, přibližuje stavbu nejčastěji používaného motoru a vymezuje definice faktorů majících podstatný vliv na brzdění motorem. V praktické části se čtenář seznámí s technikou používanou při realizovaném měření a popisem jednotlivých vozidel vybraných pro realizaci měření. Výsledkem praktické části jsou hodnoty získané měřením včetně jejich interpretace obsažené v závěru.This thesis deals with braking effect of the truck’s engine. The theoretical part introduces the reader to the basic construction of trucks, describes most using engine and defines the factors having a significant effect on engine braking. In the practical part the reader is familiar with the technique used in making the measurement and description of the vehicle chosen for the implementation of measurement. The result of the practical part is the values obtained by measurement including their interpretation contained in the conclusion.

Family Firms And Their Social Responsibility Disclosure

Family firms play an important role in the economy. Even they are more conservative than non-family firms, they monitor new trends like corporate social responsibility reporting as well. Studies on family business CSR reporting are not widespread. Because of this, the aim of paper was to find out whether and about what topics family firms disclose information, in what detail and where. Author analysed websites of the 30 Czech largest family firms using content analysis. Results show that family firms disclose more often information about their activities in the community and about their certification standards or more precisely about fulfilment of their commitments resulting from voluntarily accepted norms. If they decide to disclose CSR information, they often provide information in more detail. Information about their social responsibility behaviour is placed usually in the section called “About Us” most frequently in subsections and partly directly in the main body of the section.Family firms play an important role in the economy. Even they are more conservative than non-family firms, they monitor new trends like corporate social responsibility reporting as well. Studies on family business CSR reporting are not widespread. Because of this, the aim of paper was to find out whether and about what topics family firms disclose information, in what detail and where. Author analysed websites of the 30 Czech largest family firms using content analysis. Results show that family firms disclose more often information about their activities in the community and about their certification standards or more precisely about fulfilment of their commitments resulting from voluntarily accepted norms. If they decide to disclose CSR information, they often provide information in more detail. Information about their social responsibility behaviour is placed usually in the section called “About Us” most frequently in subsections and partly directly in the main body of the section

THE CZECH CSR REPORTS: TOPICS AND QUALITY OF THEIR PROCESSING

From the long-term perspective, Europe as a whole has been described as the leader in reporting on socially responsible behaviour. European enterprises consider a compilation of CSR reports standard. Also, the quality of information provided is, compared to the surrounding regions, relatively high. However, several studies show that regional differences exist. In the Czech Republic, this type of reporting is still at the initial stage of development. Therefore, the first objective of the research is to find out whether Czech companies provide information about their social activities and what specific topics they prefer. The second objective is to determine what the quality of provided information is. To carry out this research, annual reports of 69 companies were assessed. The paper uses the method of conceptual content analysis. The results indicate that in their annual reports, companies tend to disclose issues beyond what is legally required. The most common reported topics concern the company’s direction, information that promote the credibility of information provided and the confidence in the good corporate governance. However, the results also show that the quality of information provided is not too high.Evropa je dlouhodobě považována za lídra v oblasti reportování o společensky odpovědném chování. Evropské firmy považují vydávání reportů za standard. Také kvalita poskytovaných informací je ve srovnání s okolními částmi světa poměrně vysoká. Přesto však některé studie naznačují, že existují regionální rozdíly i uvnitř Evropy. V České republice se tento typ reportu ještě stále nachází ve svém zárodku. Proto se stalo prvním cílem výzkumu zjistit, zda české firmy poskytují informace o svých společensky odpovědných aktivitách a která témata preferují. Druhým cílem bylo určit, jaká je kvalita poskytovaných informací. Bylo zkoumáno 69 výročních zpráv pomocí obsahové analýzy. Z výsledků vyplývá, že výroční zprávy obsahují i informace nad rámec zákonné povinnosti. Nejčastěji se jedná o informace o směřování firmy, informace zvyšující důvěryhodnost poskytovaných informací a důvěryhodnost v dobré corporate governance. Jejich kvalita však není příliš vysoká.From the long-term perspective, Europe as a whole has been described as the leader in reporting on socially responsible behaviour. European enterprises consider a compilation of CSR reports standard. Also, the quality of information provided is, compared to the surrounding regions, relatively high. However, several studies show that regional differences exist. In the Czech Republic, this type of reporting is still at the initial stage of development. Therefore, the first objective of the research is to find out whether Czech companies provide information about their social activities and what specific topics they prefer. The second objective is to determine what the quality of provided information is. To carry out this research, annual reports of 69 companies were assessed. The paper uses the method of conceptual content analysis. The results indicate that in their annual reports, companies tend to disclose issues beyond what is legally required. The most common reported topics concern the company’s direction, information that promote the credibility of information provided and the confidence in the good corporate governance. However, the results also show that the quality of information provided is not too high

User Interface for Pole-Dance Training Application

Cílem této práce je vytvořit efektivní grafické uživatelské rozhraní pro výuku pole dance. Dílčím úkolem je vývoj experimentální aplikace, jejíž pomocí bude rozhraní testováno. Nejvýznamnější částí práce bylo zjištění potřeb uživatele a vytvoření vhodného návrhu. Testováním bylo zjištěno, že případné uživatelky jsou se systémem spokojeny. Aplikaci tak budou moci využít pro zdokonalování se i mimo kurzy pole dance v pohodlí svého domova.Goal of this project is making effective graphical user interface for learning pole dance. A sub-task is development of experimental application, by which the interface would be tested. The most important part of this thesis was finding out user's needs and making suitable components layout. Tests have shown that potential users are satisfied with the system. They can use this application for learning pole dance to improve outside of pole dance courses in the comfort of their homes.

Preliminary report on fish diversity at the Prince Gustav Channel, the northern part of the James Ross Island, Antarctica

Notothenioid fish were collected in the coastal part of the James Ross Island (Antarctica) mainly during Austral summer in 2012. In this paper, we report the list of species records and their basic biometric measurements as a reaction to missing ichthyofaunal investigation of this particular area. Collected fishes belong to the families Nototheniidae (Trematomus bernacchii Boulenger, 1902; T. eulepidotus Regan, 1914; T. newnesi Boulenger, 1902; Gobionotothen gibberifrons (Lönnberg, 1905); Notothenia coriiceps Richardson, 1844) and Bathydraconidae (Gymnodraco acuticeps Boulenger, 1902)