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Content available remote Zastosowanie mezoporowatych krzemionek MCF oraz SBA-16 w procesie adsorpcji nikotynamidu
Kaszyński Ł., Geszke-Moritz M., Moritz M., Dadej A., Jelińska A.
Przemysł Chemiczny
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2018
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T. 97, nr 8
1387--1391
PL
Przedstawiono wyniki badań dotyczących oceny właściwości adsorpcyjnych wobec nikotynamidu niemodyfikowanych mezoporowatych krzemionek MCF oraz SBA-16. Przeprowadzono modelowanie procesu adsorpcji z zastosowaniem izoterm Freundlicha, Jovanovicia, Langmuira oraz Dubinina i Astachowa. Parametry równań oszacowano metodą dopasowania nieliniowego, zaś optymalne parametry równań wyznaczono stosując metodę sumy znormalizowanych błędów. Krzemionka SBA-16 odznacza się nieznacznie lepszą pojemnością adsorpcyjną wobec nikotynamidu niż materiał MCF.
EN
Two types of SiO2 were used in a proportion of 0.100 g per 0.01 L nicotinamide solns. in acetonitrile (concns. 250-7150 mg/L) to det. nicotinamide adsorption isotherms at 25°C by using the Freundlich, Jovanovic, Langmuir and Dubinin-Astakhov models. Non-linear matching anal. and the sum of normalized errors were used to est. isotherm parameters and det. their optimal values, resp. Adsorption of nicotinamide on silicas was best described by the Jovanovic and Dubinin-Astakhov models
2
Content available remote On duality between order and algebraic structures in Boolean systems
Dadej A., Halik K.
Journal of Mathematics and Applications
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2013
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Vol. 36
35--62
EN
We present an extension of the known one-to-one correspondence between Boolean algebras and Boolean rings with unit being two types of Boolean systems endowed with order and algebraic structures, respectively. Two equivalent generalizations of Boolean algebras are discussed. We show that there is a one-to-one correspondence between any of the two mentioned generalized Boolean algebras and Boolean rings without unit.
3
Content available remote Properties of differences in B-rings
Dadej A., Halik K.
Journal of Mathematics and Applications
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2011
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Vol. 34
5-13
EN
Motivated by Pettis' extensions of Sierpinski theorems on generated families of sets, we consider B-rings, a generalization of the notion of Boolean algebras, and present their various properties. In particular, we discuss properties of differences which will be used in the proofs of results given in our forthcoming papers.
4
Content available Adaptive handover control in IP-based mobility networks
Park T., Dadej A.
Journal of Telecommunications and Information Technology
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2003
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nr 2
62-70
EN
In this paper, we propose framework for an adaptive handover control architecture (AHCA), which aims at enhancing overall IP handover performance while maximising utilisation of resources in wireless access networks. The IP handover procedures in the AHCA adapt dynamically to network conditions, as well as to a wide range of user profiles and application quality of service (QoS) requirements. To confirm our expectations that the AHCA will bring performance benefits in heterogeneous mobile IP networking environment, we have investigated basic performance characteristics of different handover mechanisms. The preliminary simulation results demonstrate that the AHCA will bring significant performance improvements as compared with non adaptive IP handovers.
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