When applied to genomic data, many popular unsupervised explorative data analysis tools based on clustering algorithms often fail due to their small cardinality and high dimensionality. In this paper we propose a wrapper method for gene selection based on simulated annealing and unsupervised clustering. The proposed approach, even if computationally intensive, permits to select the most relevan...

This paper proposes location-aware mobile eye-tracking as a new method for the explanation of wayfinding behavior. We argue that the recording and analysis of an individual’s visual attention during wayfinding can provide insights into her spatial abilities and employed wayfinding strategies. Examples from an explorative pilot study with a pedestrian audio guide in an urban context illustrate t...

BACKGROUND The aim of the paper is to present the Polish adaptation of the Humor Climate Questionnaire (HCQ), designed to measure humor as organizational climate feature. MATERIAL AND METHODS The authors employed back-translation and independent judges method to choose the best version of the translated items. The psychometric properties of HCQ were estimated on the basis of 2 samples: the ba...

Even though today’s recommender algorithms are highly sophisticated, they can hardly take into account the users’ situational needs. An obvious way to address this is to initially inquire the users’ momentary preferences, but the users’ inability to accurately state them upfront may lead to the loss of several good alternatives. Hence, this paper suggests to generate the recommendations without...

This paper introduces a Visual Analytics framework for the support of collaborative explorative data analysis (EDA) based on task-relevant visualization components embedded in HTML documents. The goal of our research is to let the analyst visually explore and search the answers to various questions about data and simultaneously capture and save important discoveries and thus enable collaboratio...

Natural language is a medium for expressing things belonging to conceptual and cognitive levels, made of words and grammar rules used to carry semantics. However, its natural ambiguity is the main critical issue that computational systems are generally asked to solve. In this paper, we propose to go beyond the current conceptualization of word similarity, i.e., the building block of disambiguat...

Color is one of the most important visual variables in information visualization. In many cases, two-dimensional information can be color-coded based on a 2D color map. A variety of color maps as well as a number of quality criteria for the use of color have been presented. The choice of the best color map depends on the analytical task users intend to perform and the design space in choosing a...