Precise adjustable power suplly

Tato bakalářská práce se zabývá navržením precizního spínaného zdroje. Tento spínaný zdroj pracuje s maximální střídou 99 %. Vstupní napětí je 12 V a výstupní je možno nastavit v rozsahu 1,2 V - 11,9 V. Proudově je možno zdroj zatížit 0 A - 20 A. Celý zdroj je řízen mikrokontrolérem. Při samotném řešení návrhu spínaného zdroje bylo vyvinuto pět prototypů. Poslední prototyp funguje dobře, avšak na výstupu se objevilo značné rušení.This bachelor´s thesis deals with the proposing precise switching power supply. This switching power supply works with a maximum of 99 % duty cycle. Input voltage is 12 V and output can be set in the range of 1.2 V - 11.9 V. Current can be a source of burden 0 A - 20 A. The entire power supply is controlled by microcontroller. While addressing the proposal switching power supply have been developed five prototypes. Last prototype works well, but the output appeared significant interference.

The process of identity (re)construction of six brazilian english language learners: a poststructuralist qualitative study

Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Inglês, Florianópolis, 2013.Este estudo qualitativo investiga o processo de (re)construção identitária de seis aprendizes brasileiros de língua inglesa. O estudo enfocou nas experiências mais memoráveis dos participantes em relação à aprendizagem da língua inglesa ao longo de suas vidas; nos seus investimentos na aprendizagem de inglês; nas comunidades imaginadas significativas em suas experiências de aprendizagem da língua; nas posições de sujeito que os participantes assumiram em suas turmas na universidade; e nas posições de sujeito que assumiram em relação à língua inglesa. Os dados foram gerados com seis alunos fazendo o curso de graduação em Letras-Inglês na UFSC, de 2011 a 2013, enquanto eu fazia Estágio de Docência, e incluíram observação de aulas, notas de campo, uma ficha do aluno, uma narrativa escrita, um questionário aberto, definições escritas de língua e cultura, apresentações orais, entrevistas, e e-mails. A análise seguiu algumas estratégias da teoria fundamentada nos dados, com um foco em investimentos e comunidades imaginadas (Norton, 2000; 2001, por exemplo) e levou em consideração os comentários dos participantes. Os resultados sugerem que os participantes passaram por um processo de (re)construção identitária enquanto aprendiam inglês. Além disso, os resultados mostram que as famílias exercem uma grande influência na aprendizagem de inglês, e que a aprendizagem acontece principalmente em contextos informais, portanto os contextos educacionais funcionam como apêndices. Os participantes investiram na aprendizagem de inglês desde a infância, com a esperança de adquirir recursos materiais e/ou simbólicos. As comunidades imaginadas estão relacionadas a pessoas com quem os participantes gostariam de interagir através do inglês, e incluem o mundo virtual, pessoas com mais poder, experiência, conhecimento e/ou status, e que respeitam e valorizam a diversidade. Os alunos participaram mais em aula quando se sentiam confiantes e validados, e recorriam à não-participação quando eram posicionados de formas indesejadas. Finalmente, todos os alunos desejam se relacionar com o mundo através da língua inglesa, mas frequentemente sentiam-se marginalizados e separados de outros falantes e usuários da língua.Abstract : This qualitative study investigates the process of identity (re)construction of six Brazilian English language learners. The study focused on the participants' most memorable experiences regarding English language learning throughout their entire lives; their investments in learning English; the significant imagined communities in their language learning experiences; the subject positions they assumed within their college groups; the subject positions they assumed regarding the English language. Data were generated with six students taking the undergraduate degree in Letras-Inglês at UFSC, from 2011 to 2013, while I was doing Estágio de Docência, and included class observation, field notes, a student profile form, a written narrative, an open questionnaire, written definitions of culture and language, oral presentations, interviews, and e-mail correspondences. Data analysis followed some strategies of grounded theory, with a focus on investment and imagined communities (Norton, 2000; 2001, for example), and took the participants' comments into consideration. The findings suggest that participants went through a process of identity (re)construction while learning English. Moreover, the results show that families greatly influence students' learning of English, and that learning happens mostly in informal contexts, thus the educational contexts function as appendices. The participants invested in learning English since their childhood, hoping to acquire material and/or symbolic resources. Imagined communities were related to people with whom the participants wished to connect through English, including the virtual world, people with more power, experience, knowledge and/or status, and who respect and value diversity. The students participated more in class when they felt confident and validated, and resorted to non-participation when they were positioned in undesirable ways. Finally, all students wished to relate to the world through the English language, but often felt marginalized and separated from other speakers and users of the language

A large deviation principle for Minkowski sums of heavy-tailed random compact convex sets with finite expectation

We prove large deviation results for Minkowski sums of iid random compact sets where we assume that the summands have a regularly varying distribution and finite expectation. The main focus is on random convex compact sets. The results confirm the heavy-tailed large deviation heuristics: ``large'' values of the sum are essentially due to the ``largest'' summand. These results extend those in Mikosch et al. (2011) for generally non-convex sets, where we assumed that the normalization of the sum grows faster than the number of terms.Thomas Mikosch's research is partly supported by the Danish Natural Science Research Council (FNU) Grant 09-072331, ``Point process modelling and statistical inference''. Zbyn\v ek Pawlas is partly supported by the Czech Ministry of Education, research project MSM 0021620839 and by the Grant Agency of the Czech Republic, grant P201/10/0472. Gennady Samorodnitsky's research is partially supported by a US Army Research Office (ARO) grant W911NF-10-1-0289 and a National Science Foundation (NSF) grant DMS-1005903 at Cornell University.

Effect of Common Buffers and Heterocyclic Ligands on the Binding of Cu(II) at the Multimetal Binding Site in Human Serum Albumin

Visible-range circular dichroism titrations were used to study Cu(II) binding properties of Multimetal Binding Site (MBS) of Human Serum Albumin (HSA). The formation of ternary MBS-Cu(II)-Buffer complexes at pH 7.4 was positively verified for sodium phosphate, Tris, and Hepes, the three most common biochemical buffers. The phosphate > Hepes > Tris order of affinities, together with strong spectral changes induced specifically by Tris, indicates the presence of both Buffer-Cu(II) and Buffer-HSA interactions. All complexes are strong enough to yield a nearly 100% ternary complex formation in 0.5 mM HSA dissolved in 100 mM solutions of respective buffers. The effects of warfarin and ibuprofen, specific ligands of hydrophobic pockets I and II in HSA on the Cu(II) binding to MBS were also investigated. The effects of ibuprofen were negligible, but warfarin diminished the MBS affinity for Cu(II) by a factor of 20, as a result of indirect conformational effects. These results indicate that metal binding properties of MBS can be modulated directly and indirectly by small molecules

Benefits of E-shop for Company and its Propagation

Bakalářská práce hodnotí současný stav elektronického obchodu Mgr. Elžbiety Jedzokové a jeho přínosy pro firmu. Na základě vyhodnocení současného stavu jsou navrženy kroky, které zajistí optimalizaci a propagaci na Internetu.Bachelor´s thesis evaluates the current state of e-commerce Mgr. Elžbiety Jedzokové and its benefits for the company. Based on the evaluation of the current situation are proposed steps to ensure optimization and promotion on the Internet.

Notes to Albert Schweitzer, His Concept of "Reverence for Life" and the Fifth Commandment

The theologian, musician and physician Albert Schweitzer is one of the great Persons of  modern times. But he was a big critic of modernity and even of Christianity, and tried to give his time a new ethical basis with his concept of "Reverence for Life". However, it must be revealed that his concept has certainly to do with moments of self-promotion. With his ethical concept he stands in a special relation to the Fifth Commandment "Thou shalt not kill". The more important it must be to realize, what influence had this relation in the political debates on war and peace he was engaged in. But even if it is to see that Schweitzer's conclusions remain contradictory  and even if he was not successfull to built up a perfekt ethical system, his concept of "Reverence for Life" gives an important impuls against the modern rational manipulation and exploitation of the world and for a life in God"˜s creation that is worth living

E-commerce Model and its Marketing Strategy

Obsahem práce je vytvoření elektronického obchodu pro firmu Dagen, s.r.o. na doméně Skutrymoto.cz. Předmětem prodeje jsou skútry, čtyřkolky, motorky a moto příslušenství. E-shop je vytvořen pomocí open source systému Prestashop. Práce řeší také problematiku současných marketingových modelů a jejích využití.The content of the work is the creation e-shop of company Dagen Ltd. on Skutrymoto.cz domain. The subject of sold are the scooters, ATVs, motorcycles and motorcycle accessories. E-shop is developed using open source system Prestashop. The work also deals with issues of current marketing model and its use.