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Wyszukujesz frazę "linking" wg kryterium: Temat


Tytuł:
Evaluation of polymers designed for radiation processing
Autorzy:
Przybytniak, G.
Nowicki, A.
Mirkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/148299.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
polyethylene
radiation processing
cross-linking
Opis:
Five types of commercially available polyethylene (PE) and some selected blends with components supporting cross-linking were radiation cross-linked. Mechanical properties and gel fraction were determined upon electron beam irradiation to such a dose that induces about 60% gel fraction. It was confirmed that for easily cross-linked PEs strength at break usually was growing and for polyethylenes less susceptible to radiation cross-linking – was reduced. Similar dependence was found for elongation at break. It was confirmed that for polyethylenes demonstrating high strength at break the efficiency of radiation cross-linking is limited. Additionally, for selected polymeric materials, stress relaxation and accelerated thermal aging were estimated. In order to enhance cross-linking yield some blends with EVA copolymer (ethylene-vinyl acetate) were prepared. On the basis of the literature data, the influence of crystalline regions on cross-linking and mechanical properties was discussed as well.
Źródło:
Nukleonika; 2008, 53, suppl. 2; 67-72
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Project management and entrepreneurship competences
Autorzy:
Tamberg, Taavi
Kuura, Arvi
Soosaar, Reet
Powiązania:
https://bibliotekanauki.pl/articles/1356518.pdf
Data publikacji:
2021-01-29
Wydawca:
Uniwersytet Warszawski. Wydział Nauk Ekonomicznych
Tematy:
competences
entrepreneurship
linking
project management
Opis:
Competence frameworks are increasingly used in several practice fields and have been an object of research. A typical development trend has been encapsulation into a particular field, not considering the developments in related fields. Similarly, in research, learning from neighbouring disciplines has been rare. Yet, during the past decade, there have been several attempts at linking essentially related disciplines in practice, such as entrepreneurship and project management. This is a reaction to the trends in the labour market – a growing demand for people with diverse competences. In this context, converging different fields via competences deserves more attention. This paper compares the competences required for project managers and entrepreneurs; in addition, it explores the possibilities for mutual enrichment, contributing to further linking of project management and entrepreneurship conceptually. The cross-examination of competences for entrepreneurs (The Entrepreneurship Competence Framework or EntreComp) and for project managers (International Project Management Association's Individual Competence Baseline [IPMA-ICB]) reveals some quite significant, but also weak, correlations. The linguistic approach used has natural limitations, as different terms have been used to convey the same concepts. Thus, a relational linguistic analysis and conceptual analysis have also been applied. The main implication is the recommendation to integrate core project management competences into competence models for entrepreneurs. A natural progression of this work is to build a common competence model for entrepreneurs and project managers.
Źródło:
Central European Economic Journal; 2021, 8, 55; 25 - 43
2543-6821
Pojawia się w:
Central European Economic Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of polyethylene cross-linking on properties of foams
Autorzy:
Głuszewski, Wojciech
Stasiek, Andrzej
Raszkowska-Kaczor, Aneta
Kaczor, Daniel
Powiązania:
https://bibliotekanauki.pl/articles/147154.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
polyethylene foam
radiation cross-linking
postradiation oxidation
Opis:
The process of cross-linking of polyethylene using gamma radiation (γ) and electron beam (EB) was tested from the point of view of density of foam. Particular attention was paid to the postradiation oxidation effect of the polymers. The study used two types of radiation sources of varying dose rates: gamma radiation (4 kGy/h) and EB (14 000 kGy/h). Radiolysis studies of the polymers used the radiation yield of hydrogen evolved (GH2 , approximately proportional to the number of radicals) and radiation yield of oxygen absorbed by the polymer (GO2 ). Oxidation of polymer due to radiation was also evaluated using diffuse reflectance spectroscopy.
Źródło:
Nukleonika; 2020, 65, 3; 81-85
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of radiation sterilization on poly(ester urethanes) designed for medical applications
Autorzy:
Przybytniak, G.
Kornacka, E.
Ryszkowska, J.
Bil, M.
Rafalski, A.
Woźniak, P.
Lewandowska-Szumieł, M.
Powiązania:
https://bibliotekanauki.pl/articles/146105.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
polyurethane
radiation sterilization
EPR
cross-linking
degradation
Opis:
Preparation of scaffolds for tissue regeneration requires elucidation of chemical and physical processes induced by ionizing radiation during radiation sterilization of polymeric materials used for these purposes. Such treatment induces many unintended and desired reactions that lead either to degradation or cross-linking of macromolecules. It was found that in poly(ester urethane) the ester segments are responsible predominantly for radiation induced phenomena. Some radicals generated following irradiation were identified under cryogenic conditions. Upon exposure to sterilizing dose cross-linking was confirmed on the basis of rheological changes in melted polymers. The results obtained by EPR spectroscopy and DRS revealed a relatively high susceptibility of poly(ester urethanes) on oxidation.
Źródło:
Nukleonika; 2006, 51,suppl.1; 121-128
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterisation of chitosan after cross-linking by tannic acid
Autorzy:
Sionkowska, Alina
Kaczmarek, Beata
Lewandowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1035183.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
chitosan
cross-linking
mechanical properties
tannic acid
Opis:
Chitosan is widely applied in biomedical and cosmetic fields. For this reason, there is a need to modify this biopolymer to achieve new properties of chitosan-based materials. The properties of chitosan can be modified by several cross-linking methods. In this work, we used the chemical cross-linking of chitosan with tannic acid, after which cross-linked chitosan was shaped into a 3D structure by the lyophilisation process. For the material obtained, FTIR-ATR analysis was performed to characterise the structure of cross-linked chitosan. Moreover, mechanical properties and swelling properties were measured for chitosan before and after cross-linking. The results show that several properties of chitosan can be changed after cross-linking by tannic acid. The positions of bands in the FTIR spectra of chitosan were shifted after cross-linking. Mechanical properties were altered for cross-linked chitosan. However, the highest compressive modulus was observed for pure chitosan. The lowest compressive modulus was observed for chitosan cross-linked with 20 wt% of tannic acid. Swelling behaviour also depends on the cross-linking of chitosan. It decreases for chitosan after cross-linking by tannic acid. Overall, the properties of cross-linked chitosan depend on the amount of tannic acid used for modification. This method of cross-linking can be useful for obtaining materials with specific properties.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2014, 19; 135-138
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bindeelementer i danske nominalkomposita
Autorzy:
Szubert, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1177422.pdf
Data publikacji:
2009-01-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
bindeelement
nominalt kompositum
fugeelement
linking element
nominal compound
Opis:
The aim of the article is to present the phenomenon of linking elements in Danish nominal compounds. The article presents the possible linking elements being used in Danish nominal compounds and tries to show the mechanisms in the choice of a particular linking element. There is also a discussion, whether we have to do with linking elements or inflexion in Danish nominal compounds. As a part of the conclusion some statistics on the linking elements in Danish nominal compounds is shown.
Źródło:
Folia Scandinavica Posnaniensia; 2009, 10; 237-244
1230-4786
2299-6885
Pojawia się w:
Folia Scandinavica Posnaniensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rektionskomposita im Deutschen und im Chinesischen
Synthetic compounds in German and Chinese
Autorzy:
Yang, Yaqing
Powiązania:
https://bibliotekanauki.pl/articles/926685.pdf
Data publikacji:
2019-04-26
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
synthetic compound
argument linking
German
Chinese
word formation
Opis:
The subject of this article are nominal compounds in German and Chinese which are assigned to the class of synthetic compounds. Such compounds are based on a verb stem, to which are added lexical morphemes and/or suffixes anchored in the grammar and semantics of the (verbal) head. In German, the verb with the suffix forms a derivative which, as the basic word, selects an argument (object or subject) in function of the determinative word. In this way, a government relationship is established between the constituents of the compound. This applies equally to action nouns and agent nouns. In Chinese, there are not formal exponents of the action noun, so the analysis had to be limited to agent nouns. In their derivation, the verb stem and its object mostly form a constituent that acts as a complement of the agent exponent. The examination of such synthetic compounds is carried out from the perspective of the argument.
Źródło:
Studia Germanica Posnaniensia; 2018, 39; 181-194
0137-2467
Pojawia się w:
Studia Germanica Posnaniensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ground states for fractional nonlocal equations with logarithmic nonlinearity
Autorzy:
Guo, Lifeng
Sun, Yan
Shi, Guannan
Powiązania:
https://bibliotekanauki.pl/articles/2048894.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
linking theorem
ground state
logarithmic nonlinearity
variational methods
Opis:
In this paper, we study on the fractional nonlocal equation with the logarithmic nonlinearity formed by $$\begin{cases}\mathcal{L}_{K} u(x)+u \log |u|+|u|^{q-2} u=0, & x \in \Omega \\ u=0, & x \in \mathbb{R}^{n} \backslash \Omega\end{cases}$$ where 2 < q < 2∗s, LK is a non-local operator, Ω is an open bounded set of Rn with Lipschitz boundary. By using the fractional logarithmic Sobolev inequality and the linking theorem, we present the existence theorem of the ground state solutions for this nonlocal problem.
Źródło:
Opuscula Mathematica; 2022, 42, 2; 157-178
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hierarchical EPC models – review of model linking concepts
Autorzy:
Szczęśniak, Bartosz
Powiązania:
https://bibliotekanauki.pl/articles/2064927.pdf
Data publikacji:
2019
Wydawca:
STE GROUP
Tematy:
business process modelling
EPC
BPM
linking of process models
Opis:
EPC models are currently among the leading standard business process modelling solutions. As long as the rules for creating flat EPC models are explicit and raise no significant doubts, when it comes to linking models of different types, the literature of the subject delivers diversified solutions. Four such alternative concepts that can be applied in this respect have been identified and described in this article. They have been used to link EPC models for four cases proposed. These cases differ as to the degree of complexity, and they represent different kinds of potential links between processes being modelled. Using the concepts in question with reference to the cases defined has made it possible to identify situations in which it is impossible to link models, or when it raises certain doubts. What has also been proposed is that one of the concepts identified in the paper can be modified in such a manner that using it to link EPC models does not pose any problem in any of the cases discussed.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2019, 2, 1; 476--486
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Role of Cohesion in Text Creation
Autorzy:
Jassim, Abdulmalek Hammed
Powiązania:
https://bibliotekanauki.pl/articles/2196168.pdf
Data publikacji:
2023-05-25
Wydawca:
Akademia Pedagogiki Specjalnej. Language and Society Research Committee
Tematy:
grammatical cohesion
coherence
conjunctions
lexical linking
surface structure
textuality
Opis:
This paper aims at exploring the role of cohesion in persuading listeners through answering the following questions; what types of grammatical cohesive relations are displayed and what is their frequency of occurrence in the sampled text? and how does cohesion contribute to the creation and understanding of a text? A program for corpus analysis called (AntConc Tutorial (Ver. 3.2.4) developed by Laurence Anthony (Anthony, L., 2004) is used for analyzing the sample of this study which will be the speech of the Singaporean prime minister, Lee Hsien Loong, on the COVID-19 ‘New Normal’, on 31 May 2021 (Appendix A). The study devotes attention to the speech of the Singaporean prime minister on this occasion due to the importance of this event which occupied the world. This paper depends on Halliday and Hasan’s (1976) taxonomy of cohesive devices to analyze data.
Źródło:
Language, Discourse & Society; 2023, 11, 1; 159-170
2239-4192
Pojawia się w:
Language, Discourse & Society
Dostawca treści:
Biblioteka Nauki
Artykuł

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