Elektronický doklad v účetnictví

Diplomová práce se zabývá souvislosti elektronické fakturace v České republice. Propojuje poznatky z oblasti účetnictví s možnostmi současných informačních technologií. Prace podává přehled výhod a nevýhod zavedení elektronické fakturace v podniku

Decision-making on the purchase of an information system for an enterprise

Tato disertační práce se zabývá procesem výběru informačního systému / aplikací v segmentu malých a středních podniků. V teoretické části je pozornost věnována tématu podniku a aspektům, které významně ovlivňují jeho fungování a rozhodování a mají vliv i na předmět této práce. Jedná se zejména o velikost podniku, organizační strukturu vč. pozice IT oddělení i role pracovníků, jejich kompetencí a vzájemných vazeb. V další části jsou přiblíženy pojmy a koncepty z oblasti podnikové informatiky. Na základě poznatků z odborné literatury a kombinace pohledu uživatelů (dotazníkové šetření) s pohledem managementu MSP a expertů (rozhovory) je sestaven normativní model výběru informačního systému v segmentu malých a středních podniků, jehož sestavení má přispět k lepší orientaci managementu MSP v dané problematice, efektivnějšímu a rychlejšímu výběru informačních systémů a pomoci předejít mnoha zbytečným chybám a případným finančním ztrátám.This dissertation thesis concerns with the selection process of an information system / applications in small and medium enterprises. In the theoretical part, the focus is on the enterprise and aspects that significantly affect its functioning and decision-making and also have influence on the subject of this work. These include the enterprise size, organizational structure, incl. IT department position and the role of employees, their competences and interactions. In the following part, terms and concepts from the field of business informatics are described. Based on the literature and a combination of users' views (survey) with the management of small and medium enterprises and experts perspectives (interviews), a normative model of selection of an information system in small and medium enterprises has been set up, which aims to contribute to better orientation of the management of SMEs in the issue, to more efficient and faster selection of information systems and help prevent many unnecessary errors and potential financial losses

Decision-making on the purchase of an information system for an enterprise

This dissertation thesis concerns with the selection process of an information system / applications in small and medium enterprises. In the theoretical part, the focus is on the enterprise and aspects that significantly affect its functioning and decision-making and also have influence on the subject of this work. These include the enterprise size, organizational structure, incl. IT department position and the role of employees, their competences and interactions. In the following part, terms and concepts from the field of business informatics are described. Based on the literature and a combination of users' views (survey) with the management of small and medium enterprises and experts perspectives (interviews), a normative model of selection of an information system in small and medium enterprises has been set up, which aims to contribute to better orientation of the management of SMEs in the issue, to more efficient and faster selection of information systems and help prevent many unnecessary errors and potential financial losses

Opening of steroid ring a by means of lead tetraacetate

The lead tetraacetate oxidation of cholestan-1β-ol and cholestan-1α-ol in benzene solution did not afford cyclic ethers but resulted, in major part, in the opening of ring A with formation of 1,10-seco-aldehydes. In addition, cholestane, cholest-1-ene and cholestan-1-one were also obtained

Structure-reactivity relationship in the solvolysis of 5,10-secosteroidal 5-p-nitrobenzoates

The solvolysis of (Z)- and (E)-3β-acyloxy-5,10-seco-1(10)-cholesten-5β-ol p-nitrobenzoates 4 and 5 has been investigated and compared with the solvolytic reactivity of the epimeric (Z)- and (E)-5α-p-nitrobenzoates 1 and 2, as well as of the reference compound, i.e. the 1,10-saturated 5α-p-nitrobenzoate. Kinetic data and product analysis revealed that the relative spatial orientation of the 1(10)-olefinic double bond and the chiral center at C(5) in the 10-membered ring, which these secosteroidal 5-p-nitrobenzoates can adopt in the transition state, is the main factor which determines their solvolytic behaviour, so that the esters 1,2 and 5 solvolyse with transannular double bond participation, while such an interaction is not present in the case of the (Z)-5β-ester 4. © 1979

Synthesis, structure, and reactions of secosteroids containing a medium-sized ring. Part 17. Structure-reactivity relationship in the solvolysis of 5,10-secosteroidal 3-tosylates

Kinetic measurements of the solvolysis of (Z)-3α- and (Z)-3β-, and (E)-3α- and (E)-3β-tosyloxy-5,10-secocholest-1(10)-en-5-ones in buffered aqueous acetone (90 : 10 v/v) reveal that the (Z)-3α-, (E)-3α-, and (E)-3β-tosylates are solvolysed according to a first-order rate law (the relative rates being ca. 1 : 3 : 8), while the (Z)-3β-ester, under the same conditions, reacts at a much slower rate by a complex mechanism, the kinetics of which are best approximated by a second-order law. These data and product analysis indicate that the former three esters are solvolysed with considerable double bond participation [resulting in the case of the (E)-3-esters in intramolecular cyclopropane ring closure], and that this interaction is unimportant for the (Z)-3β-tosylate. On the basis of conformational analysis of the starting tosylates and stereoelectronic requirements for homoallylic interaction, a possible mechanistic pathway for these solvolyses is proposed

Configuration and reactivity of ten-membered 5,10-seco-compounds obtained by fragmentation of 5-hydroxy-steroids

Assignment of configuration to the 1,10-double bond in the cis-trans isomeric 3β-acetoxy-5,10-seco-1,10-cholesten-5-ones has been achieved by means of NMR spectrometry. Some reactions of these new compounds have been studied and, as expected from conformational analysis, it was found that only the trans-isomer readily undergoes transannular cyclization

Synthesis, structure, and reactions of secosteroids containing a medium-sized ring. Part 17. Structure-reactivity relationship in the solvolysis of 5,10-secosteroidal 3-tosylates

Kinetic measurements of the solvolysis of (Z)-3α- and (Z)-3β-, and (E)-3α- and (E)-3β-tosyloxy-5,10-secocholest-1(10)-en-5-ones in buffered aqueous acetone (90 : 10 v/v) reveal that the (Z)-3α-, (E)-3α-, and (E)-3β-tosylates are solvolysed according to a first-order rate law (the relative rates being ca. 1 : 3 : 8), while the (Z)-3β-ester, under the same conditions, reacts at a much slower rate by a complex mechanism, the kinetics of which are best approximated by a second-order law. These data and product analysis indicate that the former three esters are solvolysed with considerable double bond participation [resulting in the case of the (E)-3-esters in intramolecular cyclopropane ring closure], and that this interaction is unimportant for the (Z)-3β-tosylate. On the basis of conformational analysis of the starting tosylates and stereoelectronic requirements for homoallylic interaction, a possible mechanistic pathway for these solvolyses is proposed