The Experts below are selected from a list of 234582 Experts worldwide ranked by ideXlab platform
Haitao Tang - One of the best experts on this subject based on the ideXlab platform.
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Application of Spatial Location Information to SIP
Cluster Computing, 2002Co-Authors: Jose Costa-requena, Haitao TangAbstract:This paper introduces an approach for providing the Spatial Location (SLO) information of the Session Initiation Protocol (SIP) devices connected to wire and wireless IP networks. The aim of the paper is to set up the framework for providing emergency call services. This method uses SIP as transport and the SLO as data format inserted in the SIP payload. It analyses the relationship among the network elements involved in the architecture, and its functionality for providing emergency call services using SIP. In conclusion, this proposal track down an emergency call via SIP, and additionally enables SIP to support some other Location-related services such as messaging, and Location-based commerce.
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Mobile Data Management - Serving Spatial Location Information over the Internet
2001Co-Authors: Haitao Tang, Mari Korkea-aho, Jose Costa-requena, Jussi RuuthuAbstract:This paper proposes a concept of serving Spatial Location information over IP networks. It clarifies and explores the requirements and solutions to realize the concept. The crucial issues elaborated with solutions are: definitions of target and its Location, its naming requirements and mechanisms, its roaming among Location servers, acquiring Spatial Location information over IP networks. Recently, issues of Location-based applications have been raised in the IP community. This paper contributes to a cutting edge effort for supporting such applications over IP networks.
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Serving Spatial Location information over the Internet
Lecture Notes in Computer Science, 2001Co-Authors: Haitao Tang, Mari Korkea-aho, Jose Costa-requena, Jussi RuutuAbstract:This paper proposes a concept of serving Spatial Location information over IP networks. It clarifies and explores the requirements and solutions to realize the concept. The crucial issues elaborated with solutions are: definitions of target and its Location, its naming requirements and mechanisms, its roaming among Location servers, acquiring Spatial Location information over IP networks. Recently, issues of Location-based applications have been raised in the IP community. This paper contributes to a cutting edge effort for supporting such applications over IP networks.
Jose Costa-requena - One of the best experts on this subject based on the ideXlab platform.
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Application of Spatial Location Information to SIP
Cluster Computing, 2002Co-Authors: Jose Costa-requena, Haitao TangAbstract:This paper introduces an approach for providing the Spatial Location (SLO) information of the Session Initiation Protocol (SIP) devices connected to wire and wireless IP networks. The aim of the paper is to set up the framework for providing emergency call services. This method uses SIP as transport and the SLO as data format inserted in the SIP payload. It analyses the relationship among the network elements involved in the architecture, and its functionality for providing emergency call services using SIP. In conclusion, this proposal track down an emergency call via SIP, and additionally enables SIP to support some other Location-related services such as messaging, and Location-based commerce.
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Mobile Data Management - Serving Spatial Location Information over the Internet
2001Co-Authors: Haitao Tang, Mari Korkea-aho, Jose Costa-requena, Jussi RuuthuAbstract:This paper proposes a concept of serving Spatial Location information over IP networks. It clarifies and explores the requirements and solutions to realize the concept. The crucial issues elaborated with solutions are: definitions of target and its Location, its naming requirements and mechanisms, its roaming among Location servers, acquiring Spatial Location information over IP networks. Recently, issues of Location-based applications have been raised in the IP community. This paper contributes to a cutting edge effort for supporting such applications over IP networks.
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Serving Spatial Location information over the Internet
Lecture Notes in Computer Science, 2001Co-Authors: Haitao Tang, Mari Korkea-aho, Jose Costa-requena, Jussi RuutuAbstract:This paper proposes a concept of serving Spatial Location information over IP networks. It clarifies and explores the requirements and solutions to realize the concept. The crucial issues elaborated with solutions are: definitions of target and its Location, its naming requirements and mechanisms, its roaming among Location servers, acquiring Spatial Location information over IP networks. Recently, issues of Location-based applications have been raised in the IP community. This paper contributes to a cutting edge effort for supporting such applications over IP networks.
G. D. Iannetti - One of the best experts on this subject based on the ideXlab platform.
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Dishabituation of laser-evoked EEG responses: dissecting the effect of certain and uncertain changes in stimulus Spatial Location
Experimental Brain Research, 2012Co-Authors: D. M. Torta, M. Liang, E. Valentini, A. Mouraux, G. D. IannettiAbstract:The repetition of nociceptive stimuli of identical modality, intensity and Location at short (1 s) and constant inter-stimulus interval (ISI) determines a strong habituation of the corresponding electroencephalographic (EEG) responses. To understand what determines this response habituation, we (1) examined the effect of introducing a selective change in the Spatial Location of the repeated stimulus (i.e., without altering its modality, intensity and timing), and (2) dissected the relative contribution of bottom-up, stimulus-driven Spatial changes and top-down, cognitive expectations of such a change. Multichannel EEG was recorded while participants received a triplet of stimuli (S1–S2–S3) delivered to the hand dorsum at 1-s ISI. S3 was delivered either to the same hand as S1 and S2 or to the other hand, and participants were either explicitly informed or not informed of the Location of S3. We found that, unlike the introduction of a change in the sensory modality of the repeated stimulus (Valentini et al. in J Cogn Neurosci 23:2822–2837, 2011 ), introducing a change in its Spatial Location did not produce a significant dishabituation of the laser-evoked N1, N2 and P2 peaks, but only a small amplitude increase following the P2 peak, maximal on the hemisphere contralateral to the stimulated hand. Furthermore, the magnitude of the elicited responses was not significantly affected by cognitive expectations. Altogether, these results indicate that bottom-up, stimulus-driven novelty resulting from a change in stimulus Spatial Location does not revert the habituation caused by repetition suppression, but determines a small increase of neural activity over the contralateral central-parietal cortex, likely reflecting shifts in Spatial attention.
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Dishabituation of laser-evoked EEG responses: dissecting the effect of certain and uncertain changes in stimulus Spatial Location
Experimental Brain Research, 2012Co-Authors: D. M. Torta, M. Liang, E. Valentini, A. Mouraux, G. D. IannettiAbstract:The repetition of nociceptive stimuli of identical modality, intensity and Location at short (1 s) and constant inter-stimulus interval (ISI) determines a strong habituation of the corresponding electroencephalographic (EEG) responses. To understand what determines this response habituation, we (1) examined the effect of introducing a selective change in the Spatial Location of the repeated stimulus (i.e., without altering its modality, intensity and timing), and (2) dissected the relative contribution of bottom-up, stimulus-driven Spatial changes and top-down, cognitive expectations of such a change. Multichannel EEG was recorded while participants received a triplet of stimuli (S1–S2–S3) delivered to the hand dorsum at 1-s ISI. S3 was delivered either to the same hand as S1 and S2 or to the other hand, and participants were either explicitly informed or not informed of the Location of S3. We found that, unlike the introduction of a change in the sensory modality of the repeated stimulus (Valentini et al. in J Cogn Neurosci 23:2822–2837, 2011 ), introducing a change in its Spatial Location did not produce a significant dishabituation of the laser-evoked N1, N2 and P2 peaks, but only a small amplitude increase following the P2 peak, maximal on the hemisphere contralateral to the stimulated hand. Furthermore, the magnitude of the elicited responses was not significantly affected by cognitive expectations. Altogether, these results indicate that bottom-up, stimulus-driven novelty resulting from a change in stimulus Spatial Location does not revert the habituation caused by repetition suppression, but determines a small increase of neural activity over the contralateral central-parietal cortex, likely reflecting shifts in Spatial attention.
Elizabeth Hampson - One of the best experts on this subject based on the ideXlab platform.
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Sex differences in the weighting of metric and categorical information in Spatial Location memory
Psychological Research, 2015Co-Authors: Mark P. Holden, Sarah J. Duff-canning, Elizabeth HampsonAbstract:According to the Category Adjustment model, remembering a Spatial Location involves the Bayesian combination of fine-grained and categorical information about that Location, with each cue weighted by its relative certainty. However, individuals may differ in terms of their certainty about each cue, resulting in estimates that rely more or less on metric or categorical representations. To date, though, very little research has examined individual differences in the relative weighting of these cues in Spatial Location memory. Here, we address this gap in the literature. Participants were asked to recall point Locations in uniform geometric shapes and in photographs of complex, natural scenes. Error patterns were analyzed for evidence of a sex difference in the relative use of metric and categorical information. As predicted, women placed relatively more emphasis on categorical cues, while men relied more heavily on metric information. Location reproduction tasks showed a similar effect, implying that the sex difference arises early in Spatial processing, possibly during encoding.
Sylvain Houle - One of the best experts on this subject based on the ideXlab platform.
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distinct neural correlates of visual long term memory for Spatial Location and object identity a positron emission tomography study in humans
Proceedings of the National Academy of Sciences of the United States of America, 1995Co-Authors: C Moscovitch, Shitij Kapur, Stefan Kohler, Sylvain HouleAbstract:Abstract The purpose of the present study was to investigate by using positron emission tomography (PET) whether the cortical pathways that are involved in visual perception of Spatial Location and object identity are also differentially implicated in retrieval of these types of information from episodic long-term memory. Subjects studied a set of displays consisting of three unique representational line drawings arranged in different Spatial configurations. Later, while undergoing PET scanning, subjects' memory for Spatial Location and identity of the objects in the displays was tested and compared to a perceptual baseline task involving the same displays. In comparison to the baseline task, each of the memory tasks activated both the dorsal and the ventral pathways in the right hemisphere but not to an equal extent. There was also activation of the right prefrontal cortex. When PET scans of the memory tasks were compared to each other, areas of activation were very circumscribed and restricted to the right hemisphere: For retrieval of object identity, the area was in the inferior temporal cortex in the region of the fusiform gyrus (area 37), whereas for retrieval of Spatial Location, it was in the inferior parietal lobule in the region of the supramarginal gyrus (area 40). Thus, our study shows that distinct neural pathways are activated during retrieval of information about Spatial Location and object identity from long-term memory.
