Spatial processing redundancy and accuracy of multichannel estimation of radar object angular coordinates

2016 ◽  
Author(s):  
Vladislav S. Pavlov
Keyword(s):  
Spatial Processing ◽  
Angular Coordinates

Encoding oriented depth video spatial processing algorithm

2014 ◽  
Author(s):  
Hao Zhou ◽  
Fen Chen ◽  
Zongju Peng ◽  
Gangyi Jiang ◽  
Mei Yu ◽  
...  
Keyword(s):  
Spatial Processing ◽  
Processing Algorithm ◽  
Depth Video

Spatial Processing for Improved Quality Recognition of Optically Recorded Voice Signals and Illumination Varied Scenery

2011 ◽  
Vol 1 (2) ◽  
pp. 91-100
Author(s):  
Yevgeny Beiderman ◽  
Yaniv Azani ◽  
Yoni Cohen ◽  
Chen Nisankoren ◽  
Mina Teicher ◽  
...  
Keyword(s):  
Spatial Processing

scholarly journals Comparison of spatial processing techniques for sonar array data

1988 ◽  
Vol 84 (S1) ◽  
pp. S16-S16
Author(s):  
David V. Wyllie ◽  
Brian G. Ferguson ◽  
Garry C. Speechley
Keyword(s):  
Spatial Processing ◽  
Array Data ◽  
Processing Techniques

Serum Micronutrient Status, Sleep Quality and Neurobehavioral function among Early Adolescents

2021 ◽  
pp. 1-27
Author(s):  
Xiaopeng Ji ◽  
Charlene W. Compher ◽  
Sharon Y. Irving ◽  
Jinyoung Kim ◽  
David F. Dinges ◽  
...  
Keyword(s):  
Sleep Quality ◽  
Early Adolescents ◽  
Serum Zinc ◽  
Spatial Processing ◽  
Poor Sleep ◽  
Poor Sleep Quality ◽  
Attention Task ◽  
Neurobehavioral Function ◽  
Iron And Zinc ◽  
Nonverbal Reasoning

Abstract Objective: To examine associations between serum micronutrients and neurobehavioral function and the mediating role of sleep quality in early adolescents. Design: In this cross-sectional study, peripheral blood samples were analyzed for iron and zinc levels. The Pittsburgh Sleep Quality Index and Penn Computerized Neurocognitive Battery were used to assess sleep quality and neurobehavioral function, respectively. The generalized linear regressions (bootstrap) were performed to estimate the associations. Setting: Jintan, China Participants: 226 adolescents (106 females) from the Jintan Child Cohort study. Results: Adolescents with low iron (< 75 ug/dl) (OR=1.29, p=0.04) and low zinc (< 70 ug/dl) (OR=1.58, p<0.001) were associated with increased odds for poor sleep quality. Adolescents with low iron and zinc were associated with fast (Iron: β=−1353.71, p=0.002, zinc: β=−2262.01, p=0.02) but less-accurate (Iron: β=−0.97, p=0.04; zinc: β=−1.76, p=0.04) performance on nonverbal reasoning task and poor sleep quality partially mediated the associations between low iron/zinc and nonverbal reasoning (p<0.05). Additionally, low iron was associated with a slower reaction on spatial processing task (β=276.94, p=0.04), and low zinc was associated with fast (β=−1781.83, p=0.03) but error-prone performance (β=−1.79, p=0.04) on spatial processing ability and slower reaction speed (β=12.82, p=0.03) on the attention task. We observed similar trends using a cutoff point of 75 ug/dl for low serum zinc, except for the association with attention task speed (p>0.05). Conclusion: Iron and zinc deficiencies may possibly be associated with poor sleep and neurobehavioral function among early adolescents. Poor sleep may partially mediate the relationship between micronutrients and neurobehavioral function.

Review lecture: Apposition eyes of large diurnal insects as organs adapted to seeing

1980 ◽  
Vol 207 (1168) ◽  
pp. 287-309 ◽  
Keyword(s):  
Nodal Point ◽  
Visual Fields ◽  
Photoreceptor Cells ◽  
Resolving Power ◽  
Field Size ◽  
Correct Position ◽  
Anatomical Arrangement ◽  
Angular Coordinates ◽  
And Function ◽  
Facet Size

(1) The fields of view of the photoreceptor cells are determined by the dimensions and anatomical arrangement of the optical part of the ommatidium. The dimensions, and therefore the fields of view of the ommatidia are also related across the eye. In the relation between structure and function there are many points that invite discussion, but the intention is to order our knowledge so that the gaps become obvious. (2) The first step has been to make maps of the eyes showing the maximum theoretical resolving power of the facets and also the interommatidial angle, the reciprocal of which is the maximum spatial resolution of combinations of facets. The ratio of these two resolutions at each point shows the minimum overlap of the visual fields. These maps can be made from the outside of the eye; they show the main types of eye. (3) The next step is to work out the optics of individual ommatidia so that the focal lengths and receptor widths can be measured. The field width can then be predicted from the facet size and the subtense of the receptor at the posterior nodal point. The final step is to measure the field widths of individual ommatidia experimentally as a test of the optical theory, and to make maps of the actual fields in their correct position on the eye in angular coordinates. (4) Three examples of maps of actual fields are given, and their anato­mical and diffraction components are separated. The maps are an essential step towards the electrophysiological analysis of the ganglia behind the eye. A theory of the origin of the fields in terms of anatomy and optics also opens the way to an analysis of mechanisms that change the field size upon adaptation to light. A comparative study of the fields in different eye regions and in different species can also be related to visual habits and behaviour.

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