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Stamatina N. Vouyiouka Evangelos Topakas Adamantia Katsini Constantine D. Papaspyrides Paul Christakopoulos 《大分子材料与工程》2013,298(6):679-689
Lipase‐catalyzed polycondensation of two biobased diacids, 1,12‐dodecanedioic acid and 1,14‐tetradecanedioic acid, with 1,8‐octanediol was achieved using immobilized Lipase B from Candida antarctica. The procedure resulted in partially renewable prepolymers, while poly(octylene adipate) from petroleum‐based adipic acid was also synthesized for comparison reasons, revealing a dependence of the enzymatic polymerization degree on monomer composition. The prepolymers were further submitted to bulk postpolymerization at temperatures in the vicinity of their melting point under flowing nitrogen. The intrinsic viscosity increase was found up to 12%, with no significant impact on the polyesters thermal properties.
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Raptis George E. Fidas Christos Katsini Christina Avouris Nikolaos 《User Modeling and User-Adapted Interaction》2019,29(1):9-65
User Modeling and User-Adapted Interaction - The heterogeneity of the audience of cultural heritage institutions introduces numerous challenges to the delivery of the content. Considering that... 相似文献
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Christina Katsini Christos Fidas Marios Belk George Samaras Nikolaos Avouris 《International journal of human-computer interaction》2013,29(19):1800-1812
ABSTRACTGraphical password composition is an important part of graphical user authentication which affects the strength of the chosen password. Considering that graphical authentication is associated with visual search, perception, and information retrieval, in this paper we report on an eye-tracking study (N = 109) that aimed to investigate the effects of users’ cognitive styles toward the strength of the created passwords and shed light into whether and how the visual strategy of the users during graphical password composition is associated with the passwords’ strength. For doing so, we adopted Witkin’s Field Dependence-Independence theory, which underpins individual differences in visual information and cognitive processing, as graphical password composition tasks are associated with visual search. The analysis revealed that users with different cognitive processing characteristics followed different patterns of visual behavior during password composition which affected the strength of the created passwords. The findings underpin the need of considering human-cognitive characteristics as a design factor in graphical password schemes. The paper concludes by discussing implications for improving recognition-based graphical passwords through adaptation and personalization techniques based on individual cognitive characteristics. 相似文献
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