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Wyświetlanie 1-7 z 7
Tytuł:
Impact of internationalization on the capital structure of commercial companies
Autorzy:
Wyrobek, J.
Lane, P.
Powiązania:
https://bibliotekanauki.pl/articles/887859.pdf
Data publikacji:
2019
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Źródło:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Polityki Europejskie, Finanse i Marketing; 2019, 22[71]
2081-3430
Pojawia się w:
Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Polityki Europejskie, Finanse i Marketing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational Characterization of Two Di-1,2,3,4-tetrazine Tetraoxides, DTTO and iso-DTTO, as Potential Energetic Compounds
Autorzy:
Politzer, P.
Lane, P.
Murray, J. S.
Powiązania:
https://bibliotekanauki.pl/articles/358276.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
DTTO
iso-DTTO
detonation properties
impact sensitivities
Opis:
Abstract: The isomeric di-1,2,3,4-tetrazine tetraoxides DTTO and iso-DTTO have aroused considerable interest in recent years as potential energetic compounds, due to their predicted high densities and heats of formation and superior detonation properties. While neither has yet been synthesized, it has been suggested that the N→O linkages on alternate nitrogens will have a stabilizing effect. In the present study, we have reassessed the expected properties of DTTO and iso-DTTO. We fnd their anticipated detonation velocities and detonation pressures to be improved over HMX and similar to CL-20. The molecular surface electrostatic potentials of DTTO and iso-DTTO are consistent with the proposed stabilizing infuence of the N→O bonds. Furthermore, estimates of the available free space in the crystal lattices indicate that DTTO and iso-DTTO may be signifcantly less sensitive to impact than either HMX or CL-20.
Źródło:
Central European Journal of Energetic Materials; 2013, 10, 1; 37-52
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational Characterization of a Potential Energetic Compound: 1,3,5,7-Tetranitro-2,4,6,8-tetraazacubane
Autorzy:
Politzer, P.
Lane, P.
Murray, J. S.
Powiązania:
https://bibliotekanauki.pl/articles/357960.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
1,3,5,7-tetranitro-2,4,6,8-tetraazacubane
energetic performance
density
impact sensitivity
Opis:
The high densities and (strain-induced) enthalpies of formation of cage-type molecules have drawn attention to their polynitro derivatives as potential energetic materials. Several such compounds have been synthesized, including octanitrocubane and hexanitrohexaazaisowurtzitane. One that has not yet been prepared but has evoked continuing interest is 1,3,5,7-tetranitro-2,4,6,8- tetraazacubane. Some years ago, on the basis of a very high estimated density (about 2.19 g/cm3), it was predicted to have detonation properties greatly superior to those of HMX. We have now used computational procedures developed since that time to reassess the expected detonation performance of this compound. We find: density, 1.940 g/cm3; solid phase enthalpy of formation at 298 K, 757 cal/g; detonation velocity, 9.8 mm/µs; detonation pressure, 444 kbar; impact sensitivity, h50 ∼ 40 cm. These are all better than the corresponding values for HMX, but not by as much as had been estimated earlier.
Źródło:
Central European Journal of Energetic Materials; 2011, 8, 1; 39-52
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tricyclic polyazine n-oxides as proposed energetic compounds
Autorzy:
Politzer, P.
Lane, P.
Murray, J. S.
Powiązania:
https://bibliotekanauki.pl/articles/358097.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
tricyclic polyazine N-oxides
detonation performance
sensitivity
free space in crystal lattice
molecular electrostatic potentials
Opis:
In designing proposed new explosives, we seek a balance between high detonation performance and low sensitivity. Accordingly we focus upon (1) planar molecules, for better packing efficiency and reduced shear strain upon impact/ shock, (2) high nitrogen content, for greater density and enthalpy of formation, (3) N→O linkages rather than NO2 or ONO2 groups as sources of oxygen, and (4) presence of NH2 groups, if possible, to increase density and diminish sensitivity. Here we report the results of a computational assessment of three tricyclic polyazine N-oxides that essentially satisfy these structural criteria. Their predicted crystal densities range from 1.96 to 2.03 g/cm3. The calculated solid phase enthalpies of formation are between 135 and 314 kcal/mol. The computed detonation velocities and detonation pressures are similar to HMX for two of the compounds and significantly greater for the third, exceeding even CL-20. Impact sensitivities were estimated on the basis of (1) the free space available in the respective crystal lattices, and (2) the molecular surface electrostatic potentials. All three compounds are expected to be less impact sensitive than both HMX and CL-20. One of the three in particular is suggested to represent the best balance between detonation performance and sensitivity.
Źródło:
Central European Journal of Energetic Materials; 2013, 10, 3; 305-323
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computational Investigation of Amine Complexes of 2,4,6-Trinitrotoluene
Autorzy:
Politzer, P.
Murray, J. S.
Koppes, W. M.
Concha, M. C.
Lane, P.
Powiązania:
https://bibliotekanauki.pl/articles/358818.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
trinitrotoluene
amine interactions
hypergolic reactions
Opis:
Using the B3PW91/6-31G(d) computational procedure, we fnd two types of complexes to be formed between aliphatic amines and 2,4,6-trinitrotoluene (TNT). Type 1 are noncovalent, primarily electrostatic interactions that occur in the vicinities of the NO2 groups; Type 2 are δ-adducts, at carbons 1, 3 and 5. In Type 1, the TNT framework is very little affected. In Type 2, however, the site of the complex becomes quasi-tetrahedral, with longer bonds to its neighbors in the ring; the C-NO2 bonds are shortened. The Type 1 complexes have weakly negative (attractive) interaction enthalpies. For one of them, utilizing a chargetransfer formalism, we obtained a wave length for an electronic transition to a low-lying dative excited state that is in good agreement with observed values. The Type 2 interaction enthalpies are near-zero or even positive; however all of the complexes correspond to energy minima (no imaginary frequencies). For one of the Type 2, a transition state to a nitronic acid was found, with an activation enthalpy of only 5.6 kcal/mole. This indicates a possible route for amine-induced decomposition of TNT.
Źródło:
Central European Journal of Energetic Materials; 2009, 6, 2; 167-182
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of e-business techologies on healthcare - new horizons or false dawns?
Autorzy:
Lane, V.
Hayward, P.
Lane, D.
Powiązania:
https://bibliotekanauki.pl/articles/332860.pdf
Data publikacji:
2002
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
technologie e-biznesu
telemedycyna
e-zdrowie
oprogramowanie wspierające decyzje
ocena stanu zdrowia rannych
e-publikacje
e-business technologies
telemedicine
e-health
decision-support software
NHS direct
triage
e-publishing
Opis:
The expectation that computer networks combined with the Internet and associated technologies will be common in all businesses of the future has resulted in a flurry of investment in ICT around the globe, and in wide interest in the Internet, e-commerce and e-business. For example the Malaysian government has created a high-speed data highway, a federal capital that is a 'wired city', and a 'paperless hospital' [1]. The UK Government too has recently approved plans for major ICT projects [5, 10]. These projects are in healthcare, and involve large financial sums. It is important that the use of these public funds leads to successful outcomes. This paper analyses a large successful ICT project that uses e-business technologies. The aim of the paper is to identify the success factors in this completed project to see if these pointers indicate favourable prospects for the outcome of these new healthcare projects.
Źródło:
Journal of Medical Informatics & Technologies; 2002, 3; IP15-23
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Designing a protocol to aid decision making in a billion dollar healthcare organisation: using collaborative research
Autorzy:
Lane, V.
Avalon, J.
Hayward, P.
Snaith, J.
Powiązania:
https://bibliotekanauki.pl/articles/333944.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
medycyna oparta na dowodach
pamięć korporacyjna
kultura organizacji
zarządzanie wiedzą
organizacje nauczania
evidence-based medicine
corporate memory
organisational culture
knowledge management
learning organisations
Opis:
This paper describes a method to accomplish 'a pre-planned guided search of interesting and known knowledge and information sources for decision making in public health medicine', i.e. a search protocol. The protocol is based around a knowledge base of known information and knowledge sources. These sources have been useful in earlier public health studies. The database of sources is maintained and updated as a consequence of each new study on which the search protocol is used. The paper outlines how the protocol has been created, built and tested. The results of using the protocol on five different public health studies are presented and analysed.
Źródło:
Journal of Medical Informatics & Technologies; 2010, 15; 93-100
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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