2,952 research outputs found
Project to implement e-commerce solutions in company ELPOS Josef Tkadlec Ltd.
No full textDiplomová práce se zabývá návrhem a implemntací e-commerce řešení ve společnosti ELPOS Josef Tkadlec spol. s.r.o. V teoretické části jsou shrnuty veškeré důležité oblasti týkající se e-commecre, internetového marketingu a technické části projektu. Praktická část je pak věnována zpracování analýzy, jejíž výsledky vyústí v potřebu e-commerce řešení. Samotná realizace je popsána v projektové části. Na závěr nechybí vyhodnocení celého projektu a návrhy na zlepšení stávající situace.This master thesis deals with design and implementation of e-commerce solution in company ELPOS Josef Tkadlec spol.s.r.o. The theoretical section summarizes all the important areas such as e-commerce, internet marketing and technical part of the project. The practical part is devoted to the analysis, the results of which lead in the need of e-commerce solution. Implementation itself is described in the project part. In conclusion there is the evaluation of the project and suggestions for the improvements of the current situation.Ústav financí a účetnictvíobhájen
The Reform Catholic Josef Dobrovský
Full text linkReformní katolík Josef Dobrovský The Reform Catholic Josef Dobrovský Josef Táborský The goal of this dissertation thesis is to introduce Josef Dobrovský as a priest influenced by the Enlightenment and participating in reformative effort in Catholic church of 18th century. Author of this dissertation has not focused on Josef Dobrovský's excellent scientific work but rather on the importance of Josef Dobrovský as both the scholar and the the man oriented towards the Christian faith and questions connected with it
Atomic effect algebras with compression bases
No full textCompression base effect algebras were recently introduced by Gudder [6]. They generalize
sequential effect algebras [7] and compressible effect algebras [5]. The present
paper focuses on atomic compression base effect algebras and the consequences of
atoms being foci (so-called projections) of the compressions in the compression base.
Part of our work generalizes results obtained in atomic sequential effect algebras by
Tkadlec [11]. The notion of projection-atomicity is introduced and studied and several
conditions that force a compression base effect algebra or the set of its projections to
be Boolean are found. Finally, we apply some of these results to sequential effect algebras
and strengthen a previously established result concerning a sufficient condition
for them to be Boolean
Josef Formánek prose write (talented, admired, cursed)
Full text linkThis thesis aims to introduce a new figure in Czech prose, Josef Formanek. The focus is predominantly on the interpretation and evaluation of the novel Mluviti pravdu. Other parts of the thesis deal with a comprehensive characterisation of individual works of the author. The outcome is to depict how Josef Formanek is placed in the context of contemporary Czech literature. The aim of the thesis is to provide a monography about the new author of Czech prose ,whose monography hasn't been written up as of yet
Long Plane Trees
Full text linkIn the longest plane spanning tree problem, we are given a finite planar
point set , and our task is to find a plane (i.e., noncrossing)
spanning tree for with maximum total Euclidean edge length.
Despite more than two decades of research, it remains open whether this problem
is NP-hard. Thus, previous efforts have focused on olynomial-time algorithms
that produce plane trees whose total edge length approximates , the
maximum possible length. The approximate trees in these algorithms all have
small unweighted diameter, typically three or four. It is natural to ask
whether this is a common feature of longest plane spanning trees, or an
artifact of the specific approximation algorithms.
We provide three results to elucidate the interplay between the approximation
guarantee and the unweighted diameter of the approximate trees. First, we
describe a polynomial-time algorithm to construct a plane tree with diameter at
most four and total edge length at least . This
constitutes a substantial improvement over the state of the art. Second, we
show that a longest plane tree among those with diameter at most three can be
found in polynomial time. Third, for any candidate diameter , we
provide upper bounds on the approximation factor that can be achieved by a
longest plane tree with diameter at most (compared to a longest plane tree
without constraints).Comment: 40 pages, 30 figures; a preliminary version appeared at SoCG 202
Fast and strong amplifiers of natural selection
Full text linkPopulation structure can influence the probability of and time to fixation of new mutants. Here, Tkadlec et al. demonstrate mathematically that structures that increase fixation probability necessarily slow fixation, but also identify amplifying structures with minimal reductions in fixation time
Algebraic and measure-theoretic properties of the structures close to Boolean algebras
Full text linkTéma této disertační práce je studium konečně aditivních měr na strukturách blízkých Booleovým algebrám. Ve formulaci přijaté v teoretické fyzice jde o vyšetřování stavů na kvantových logikách. Přínos této disertační práce je obsažen v pěti přiložených článcích. V prvním z těchto článků se autor zabývá stavy s hodnotami v obecném tělese charakteristiky nula. Cílem je zobecnit klasickou Hornovu-Tarského větu o rozšiřování stavů (HT). Autor částečně uspěl v některých speciálních případech, ale obecně se ukázalo, že přirozená reformulace věty HT pro tělesa neplatí (kromě znaménkové formulace HT, kde se podařilo původní reálně hodnotovou HT zobecnit na tělesovou formulaci). V druhém článku autor vyšetřuje ortomodulární svazy, které dovolují zavedení symetrické diference. Tyto struktury, které jsou v současné době intenzivně studovány, byly v tomtu článku obohaceny o vhodný pojem stavu. Vznikla pak otázka, kdy se dá daný stav rozšířit na větší logiku (případně i takovou, která není množinově reprezentovatelná). Autor ukázal, že stavová rozšíření jsou možná pokud je stav definován na Booleově algebře. V obecnosti ani logiky velice blízké Booleovským stavová rozšíření nedovolují. Ve třetím článku autor dále analyzoval množinově reprezentovatelné logiky. Jako hlavní výsledky lze jmenovat kritérium pro rozšiřování stavů na Gudderových logikách a příspěvek k jistým fyzikálně motivovaným otázkám pro klasickou hustotní logiku (určitý nový pohled na Banachovy limity). Ve čtvrtém článku se autor zabývá pravděpodobnostně motivovaným pojmem Jauchova-Pironova stavu. Autor nalezl nutnou a postačující podmínku pro rozšiřování stavů definovaných na Booleově algebře a zachovávající při rozšíření Jauchovu-Pironovu vlastnost. Aplikací tohoto výsledku je dokázána věta o rozšiřování Jauchových-Pironových stavů na projektorovou logiku L(H). V pátém článku je zavedeno jisté nekonečné rozšíření Gudderovy logiky. V poněkud překvapivém kontrastu s konečnou Gudderovou logikou je dokázáno, že tyto zobecněné logiky dovolují rozšiřování stavů na potenční množinu.The theme of the thesis is, in general terms, a study of finitely additive measures on the structures similar to Boolean algebras. Formulating this theme in the language of theoretical physics, it is an investigation of states on (algebraic) quantum logic. The contribution of the thesis is based on five papers included in the thesis. In the first paper, the author considers field-valued states for the fields of characteristics zero. The intention is to generalize the classic Horn-Tarski state extension theorem (HT). The author partially succeded in special cases but in general it was shown that a natural formulation of HT cannot be obtained (except for the signed form of HT where the original real-valued HT result allows for the field-valued formulation). In the second paper, the author investigated the orthomodular lattices that can be endowed with a symmetric difference. This orthomodular lattices, recently intensely studied, was enriched in this paper with an appropriate notion of state. Then a question was asked when, given a state, one can extend it over a bigger (possibly non-set-representable) logic. The author showed that this state extension is possible when the ``domain'' logic is a Boolean algebra, but in general even ``almost Boolean'' logics do not allow for a state extension. In the third paper, the author further analyzed the set-representable logics. Main results obtained are a state extension criterion for Gudder's logics and a clarification of certain physically motivated questions on the classic density logic (a certain new view of Banach limits). The fourth paper deals with the quantum-probabilistically justified notion of Jauch-Piron states. The author found a necessary and sufficient condition for the extension of states, as Jauch-Piron states, defined on Boolean algebras. This result, as an application, establishes a Jauch-Piron state extension over the projection logic L(H). The fifth paper brings an infinite generalization of Gudder's logics and shows, in a slightly surprising contrast to Gudder's logics, that the states on these generalized logics allow for the extension over the power set
Interpretation of fairy tales authored by Josef Štefan Kubín
Full text linkInterpretation of fairy tales authored by Josef Štefan Kubín Ondřej Vojtíšek Abstract: This bachelor's thesis deals with interpretation of Josef Štefan Kubín's author fairy tales both in theory and application. Its goal is to describe options of interpretation of children's literature and to demonstrate these options by means of Kubín's literal work. As a result, this bachelor's thesis also highlights semantics riches and valuable qualities of this part of Kubín's work, which is being neglected by publishers nowadays. In its theoretical part, the thesis addresses several issues: different ways of interpretation of fairy tales, specification of the term "author fairy tale" and the different forms of Kubín's fairy tales. As a method of interpretation, synthesis of several approaches (Franz, Šmahelová, Urbanová, and others) was used and each of these approaches was described by one example. This synthesis provides insight into the meaning of fairy tales that can be therefore understood as representation of situations outlined not only with help of motives but with help of specific expressions as well. Collections of fairy tales authored by Kubín are analyzed in respect to the amount of Kubín's own invention compared with the quantity of folk motives. This analysis is accompanied by brief Kubín's biography and..
Josef Mitterer’s Escape from Essentialism
No full textEwa Bińczyk Josef Mitterer’s Escape from Essentialism
In her review of Josef Mitterer’s book “Ucieczka z dowolności”, the Author provides a critical evaluation of the book which proposes to depart from dualist assumptions in the process of communication.Ewa Bińczyk Josef Mitterer’s Escape from Essentialism
In her review of Josef Mitterer’s book “Ucieczka z dowolności”, the Author provides a critical evaluation of the book which proposes to depart from dualist assumptions in the process of communication
Josef Willomitzer (1849 - 1900). Life and Work of German Writing Author from Bohemia.
No full textJosef Willomitzer (1849 - 1900). Life and Work of German Writing Author from Bohemia. The bachelor theses deals with life and work of german writing author from Bohemia, Josef Willomitzer. The work describes as a introduction the social and culture situation in Prague in the end of 19. century. The following chapters concern Willomitzers life and work in context of the historical and political development of Bohemia. The work is based on information available from ressources such as lexicons, newspaper articles and archive ressources. Apart from his life is in this work described also his journalistic activity. In the last part is summarized Willomitzers literary work. The analysis of chosen works which correspond to certain historical topics is also involved. The purpose of this work is to draw up a compact biography of Josef Willomitzer and a summary of his work. Keywords: Josef Willomitzer, humoresque, journalism, Bohemia, German Prague in the end of 19. centur
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