Publications (40) View all
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Article: Non-digitizing Data Restoration with Using Indirect Data Processing
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ABSTRACT: In this study, we proposed the method of automatics searching predefined events location in digital images of old paper-tape data recording, which in essence is indirect processing. The main idea of proposed algorithm is isomorphic transformation of paper–tape digital images to the time-serial data. The time-serial data obtained by this transformation is clustered and classified to obtain the positions of predefined events in digital paper-tape-images. The regular approach to data processing (pattern recognition for image or advanced image processing) is very laborious. In most cases only part of information contained in paper tape is interesting. The method can be used as preliminary estimation amount information and position in a paper-tape of this information before more sophisticated data processing. Proposed algorithm is fast and has sufficient good quality of data restoration for the positioning of predefined events.Future Computing, Service Computation, Cognitive, Adaptive, Content, Patterns, Computation World. 11/2009; -
Article: Behavioral indications of object-presence in haptic virtual environments.
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ABSTRACT: The success of many virtual environment (VE) applications relies on their ability to induce in their users a sense of presence. In immersive VE, presence is a sense of being and acting inside a virtual place, whereas in a nonimmersive haptic VE, it is a sense of being able to touch and manipulate a virtual object. This latter sense of object-presence is typically measured by questionnaires, and the current study aimed to find objective behavioral indications for it. Participants moved a stylus along the blades of a virtual razor and along identical virtual lines with haptic feedback but without the context of a razor. Our measurements show that participants' movements were slower and they exerted less force on the stylus in the razor condition than in the simple lines condition. This behavioral pattern suggests that some degree of object-presence illusion was formed, which caused participants to act more cautiously in order to avoid any harm from the virtual razor.Cyberpsychology & behavior: the impact of the Internet, multimedia and virtual reality on behavior and society 02/2009; 12(2):183-6. · 1.59 Impact Factor -
Article: Sensory dominance in combinations of audio, visual and haptic stimuli.
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ABSTRACT: Participants presented with auditory, visual, or bi-sensory audio-visual stimuli in a speeded discrimination task, fail to respond to the auditory component of the bi-sensory trials significantly more often than they fail to respond to the visual component--a 'visual dominance' effect. The current study investigated further the sensory dominance phenomenon in all combinations of auditory, visual and haptic stimuli. We found a similar visual dominance effect also in bi-sensory trials of combined haptic-visual stimuli, but no bias towards either sensory modality in bi-sensory trials of haptic-auditory stimuli. When presented with tri-sensory trials of combined auditory-visual-haptic stimuli, participants made more errors of responding only to two corresponding sensory signals than errors of responding only to a single sensory modality, however, there were no biases towards either sensory modality (or sensory pairs) in the distribution of both types of errors (i.e. responding only to a single stimulus or to pairs of stimuli). These results suggest that while vision can dominate both the auditory and the haptic sensory modalities, it is limited to bi-sensory combinations in which the visual signal is combined with another single stimulus. However, in a tri-sensory combination when a visual signal is presented simultaneously with both the auditory and the haptic signals, the probability of missing two signals is much smaller than of missing only one signal and therefore the visual dominance disappears.Experimental Brain Research 12/2008; 193(2):307-14. · 2.39 Impact Factor -
Article: Repetition priming for multisensory stimuli: task-irrelevant and task-relevant stimuli are associated if semantically related but with no advantage over uni-sensory stimuli.
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ABSTRACT: Signals presented simultaneously in two sensory modalities are detected faster and more accurately than their uni-modal presentations. We investigated the effect of repeated experience in successive test blocks (Repetition Priming, RP) for simultaneously presented multi-sensory stimuli, as compared to uni-sensory, visual, stimuli. Participants had to decide whether the order of letters in two letter-strings (the visual stimulus) was reversed or not. The visual stimuli were presented alone or accompanied by a task-irrelevant auditory or a haptic signal. The letter-strings denoted words that were either semantically related or unrelated to the auditory or haptic signals. RT measurements showed significant RP across all conditions, with accuracy at ceiling. The RP gains were not significantly different for the uni- and the bi-sensory stimulus combinations in the initial three blocks. However, in the 4th block, where instead of the paired bi-sensory stimuli the previously paired visual stimulus was presented alone, the RP gains were significantly smaller in the semantically-related stimuli (disassociation cost). Congruent bi-sensory stimuli had been shown to improve perceptual learning compared to uni-sensory stimuli when both signals were task-relevant. Our results suggest that when an additional signal, in a different sensory modality, is irrelevant for the task's performance, there may be no advantage--in terms of greater RP gains--for multisensory stimuli. Nevertheless, semantically related stimuli experienced simultaneously in different sensory modalities may be represented in an associative manner in implicit memory even when only one stimulus is task-relevant.Brain research 12/2008; 1251:236-44. · 2.46 Impact Factor -
Chapter: When an Image Turns into Knowledge: The Role of Visualization in Thought Experimentation
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ABSTRACT: This chapter will suggest that experiments carried out in thought are a valid and powerful tool for the construction of insight into the behavior of the world. Thought experiments (TEs) include five components, the central of which is visualization. We suggest that the bounded yet structured visualization of imaginary worlds, integrated with logical and conceptual derivations from them, provide a powerful cognitive mechanism for ‘knowing’. We define kinds of visualization in a TE by analyzing well known historical thought experiments in science and students’ TEs. We suggest that the structures of these imaginary worlds are based on a kind of ‘instinctive knowledge’ which is frequently tacit.12/2007: pages 295-309;
