Selective Suppression of IRNSS S-band Signals for Specific Applications

Author(s):  
Uttama Ghosh ◽  
A.D. Sarma ◽  
Mohd Qurram Javeed ◽  
N.V. Koteswara Rao
Perception ◽  
10.1068/p6916 ◽  
2011 ◽  
Vol 40 (11) ◽  
pp. 1282-1289 ◽  
Author(s):  
Ludovica Lorusso ◽  
Gavin Brelstaff ◽  
Linda Brodo ◽  
Andrea Lagorio ◽  
Enrico Grosso

Following other researchers, we investigated the premise that visual judgment of kinship might be modelled as a signal-detection task, strictly related to similar facial features. We measured subjects' response times to face-pair stimuli while they performed visual judgments of kinship, similarity, or dissimilarity, and examined some priming effects involved. Our results show that kinship judgment takes longer on average than either similarity or dissimilarity judgment—which is compatible with existing models, yet might also suggest that kinship judgments are of a more complex character. In our priming study we observed selective suppression/enhancement of the efficacy of dissimilarity judgments whenever they followed similarity and kinship judgments. This finding confounds the notion, inherent in previous models, of resemblance cues signalling for kinship, since similarity and dissimilarity cannot be considered just as opposite concepts, and observed priming effects need to be explicitly modelled, including dissimilarity cues. To model kinship judgments across faces that are perceived as dissimilar, a new framework may be required, perhaps accepting the perspective of a task-driven use of the visual cues, modulated by experience and cultural conditioning.


1998 ◽  
Vol 40 (4) ◽  
pp. 505-510 ◽  
Author(s):  
Kagayaki Kuroda ◽  
Koichi Oshio ◽  
Robert V. Mulkern ◽  
Ferenc A. Jolesz

1983 ◽  
Vol 30 (6) ◽  
pp. 867-874 ◽  
Author(s):  
Vivian V. Smith ◽  
Bruce P. Halpern

1969 ◽  
Vol 68 (1-6) ◽  
pp. 468-473 ◽  
Author(s):  
J. B. Janeke ◽  
L. B. W. Jongkees ◽  
W. J. Oosterveld

Neoplasia ◽  
2005 ◽  
Vol 7 (5) ◽  
pp. 457-465 ◽  
Author(s):  
Sophie Kusy ◽  
Patrick Nasarre ◽  
Daniel Chan ◽  
Vincent Potiron ◽  
David Meyronet ◽  
...  

2018 ◽  
Vol 72 (3-4) ◽  
pp. 149-161 ◽  
Author(s):  
Luke W. Arbogast ◽  
Frank Delaglio ◽  
Joel R. Tolman ◽  
John P. Marino

2012 ◽  
Vol 24 (10) ◽  
pp. 2043-2056 ◽  
Author(s):  
Ayano Matsushima ◽  
Masaki Tanaka

Resistance to distraction is a key component of executive functions and is strongly linked to the prefrontal cortex. Recent evidence suggests that neural mechanisms exist for selective suppression of task-irrelevant information. However, neuronal signals related to selective suppression have not yet been identified, whereas nonselective surround suppression, which results from attentional enhancement for relevant stimuli, has been well documented. This study examined single neuron activities in the lateral PFC when monkeys covertly tracked one of randomly moving objects. Although many neurons responded to the target, we also found a group of neurons that exhibited a selective response to the distractor that was visually identical to the target. Because most neurons were insensitive to an additional distractor that explicitly differed in color from the target, the brain seemed to monitor the distractor only when necessary to maintain internal object segregation. Our results suggest that the lateral PFC might provide at least two top–down signals during covert object tracking: one for enhancement of visual processing for the target and the other for selective suppression of visual processing for the distractor. These signals might work together to discriminate objects, thereby regulating both the sensitivity and specificity of target choice during covert object tracking.


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