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Faliagka E.,Technological Educational Institution of Western Greece | Rigou M.,University of Patras | Sirmakessis S.,Technological Educational Institution of Western Greece
Behaviour and Information Technology | Year: 2015

The intuitiveness of gestural devices offers great potential for more physical ways of interacting, but it is imperative that such devices comply with existing, platform-independent usability principles that have proven their effect in heterogeneous settings over the last decades. This study focuses on iPhone, one of the most widely used haptic devices and reviews the usability problems of five built-in iPhone applications documented in related sources. The study investigates whether these problems are actually reported during testing with novice users, which is their severity and whether testing reveals additional issues. Overall, the study confirmed the list of usability problems documented and stressed the importance of conforming to established usability principles. © 2014 Taylor & Francis.

Vlahos N.,Technological Educational Institution of Western Greece | Vlahos N.,University of Thessaly | Vasilopoulos M.,Technological Educational Institution of Western Greece | Mente E.,University of Thessaly | And 3 more authors.
Integrative Zoology | Year: 2015

In order to conserve and culture the cichlid fish Archocentrus nigrofasciatus, more information about its reproductive biology and its larval behavior and morphogenesis is necessary. Currently, temperatures ranging from 21 to 27 °C are used in ornamental aquaculture hatcheries. Lower temperatures are preferred to reduce the costs of water heating, and 23 °C is usually the selected temperature. However, there is limited information on culturing protocols for ornamental species and most of the information generated on this topic remains scarce. Thus, the present study examines the morphological development of Archocentrus nigrofasciatus during the yolk-sac period up to the age of 100 h post-hatching in relation to 2 temperature regimes used in ornamental aquaculture: a temperature of 27 °C (thermal optimum) and a decreased temperature of 23 °C (thermal tolerance). The results of this study suggest that the 27 °C temperature generates intense morphological changes in yolk-sac development in a shorter period. This has advantages as it reduces the time of yolk-sac larval development, and, thus, minimizes the transition phase to exogenous feeding and maximizes the efficiency at which yolk is converted into body tissues. The present paper provides necessary information to produce freshwater ornamental fish with better practices so as to increase larval survival and capitalize on time for growth. © 2015 International Society of Zoological Sciences, Institute of Zoology/Chinese Academy of Sciences and Wiley Publishing Asia Pty Ltd.

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