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Previous research on the effects of interruptions on the speed of performing the computerized tasks gave rather non-homogeneous results: many authors insist that interrupted users always complete tasks slower than when performing the same tasks without interruption, but others showed that interrupting a user during some categories of tasks caused that user(More)
1. Introduction With recent trends in labour requirements moving from manual labour to cognitive oriented tasks, the need for understanding of the factors that influence skilled cognitive task performance has never been greater. One of such factors are interruptions during performing computer aided mental tasks. We have chosen interruptions as a topic for(More)
of the material is concerned, specifically the rights of translation, reprinting, re-use of illustrations, recitation, broadcasting, reproduction on microfilms or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its(More)
We report a detailed scaling analysis of resistivity rho(T,n) measured for several high-mobility 2D electron systems in the vicinity of the 2D metal-insulator transition. We analyzed the data using the two-parameter scaling approach and general scaling ideas. This enables us to determine the critical electron density, two critical indices, and temperature(More)
In the past few years flat user interface design has become the predom‐ inating visual style of operating systems, websites and mobile apps. Although flat design has been widely criticized by HCI and usability experts, empirical research on flat design is still scarce. We present the results of an experimental comparative study of visual search(More)
Online air ticket booking is a cognitively complex task even on fully-functional internet-access devices such as desktops, representing a repetitive multi-parametric search in the flights database and then browsing long lists of flights found, consisting of different carriers, prices, dates and times, to create an optimal combination of outbound and inbound(More)