Results 271 to 280 of about 1,235,187 (346)
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Toward Reliable Non-Line-of-Sight Localization Using Multipath Reflections
Proceedings of the ACM on Interactive Mobile Wearable and Ubiquitous Technologies, 2022The past decade's research in RF indoor localization has led to technologies with decimeter-level accuracy under controlled experimental settings. However, existing solutions are not reliable in challenging environments with rich multipath and various ...
Xianan Zhang +3 more
semanticscholar +1 more source
On Landau’s Eigenvalue Theorem for Line-of-Sight MIMO Channels
IEEE Wireless Communications Letters, 2022An alternative derivation is provided for the degrees of freedom (DOF) formula on line-of-sight (LOS) channels via Landau’s eigenvalue theorem for bandlimited signals. Compared to other approaches, Landau’s theorem provides a general framework to compute
Andrea Pizzo, A. Lozano
semanticscholar +1 more source
2011
In line-of-sight (LOS) radiocommunications, the main route is the direct path between the transmitter and receiver considering the curvature of radiowave trajectory. In Chap. 2, we discussed the general phenomena such as free-space loss (FSL) , gas and vapor loss, Fresnel radius, K-factor, and other mechanisms such as diffraction, reflection, and ...
Abdollah Ghasemi +2 more
openaire +2 more sources
In line-of-sight (LOS) radiocommunications, the main route is the direct path between the transmitter and receiver considering the curvature of radiowave trajectory. In Chap. 2, we discussed the general phenomena such as free-space loss (FSL) , gas and vapor loss, Fresnel radius, K-factor, and other mechanisms such as diffraction, reflection, and ...
Abdollah Ghasemi +2 more
openaire +2 more sources
Leveraging Rough-Relay-Surface Scattering for Non-Line-of-Sight mmWave Radar Sensing
IEEE Internet of Things JournalNon-line-of-sight (NLOS) sensing is essential for unmanned robots and intelligent transportation systems, as it enables the sensor to detect targets around street corners, reducing the collision risk.
You Xu, Guanghua Liu, Tao Jiang
semanticscholar +1 more source
Journal of Clinical Pediatric Dentistry, 2016
Objectives: It remains unclear how the realignments of the face and basicranium that characterize humans were acquired, both phylogenetically and ontogenetically. The developmentally constrained nature of the skull has been previously demonstrated in other primates using Donald H. Enlow's mammalian craniofacial architectural relationships.
Michala K, Stock +4 more
openaire +2 more sources
Objectives: It remains unclear how the realignments of the face and basicranium that characterize humans were acquired, both phylogenetically and ontogenetically. The developmentally constrained nature of the skull has been previously demonstrated in other primates using Donald H. Enlow's mammalian craniofacial architectural relationships.
Michala K, Stock +4 more
openaire +2 more sources
Ergonomics, 1986
Abstract Recent experiments with 16 male and 16 female subjects indicated that they like to look down rather steeply at an average of −29° below horizontal, s.d. 11·6°, when sitting with trunk and head upright. This angle is steeper when the visual target is at 0·50 m distance (−33°±11·3°) but flatter when the target is at 1·00 m (−24° ± 10·4°).
K H, Kroemer, S G, Hill
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Abstract Recent experiments with 16 male and 16 female subjects indicated that they like to look down rather steeply at an average of −29° below horizontal, s.d. 11·6°, when sitting with trunk and head upright. This angle is steeper when the visual target is at 0·50 m distance (−33°±11·3°) but flatter when the target is at 1·00 m (−24° ± 10·4°).
K H, Kroemer, S G, Hill
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Reflection-Assisted Non-Line-of-Sight Ultraviolet Communications
Journal of Lightwave Technology, 2022Considering high path loss (PL) of the non-line-of-sight (NLOS) ultraviolet communications (UVC) realized by the atmospheric scattering effect of ultraviolet light, we propose to use a reflective plane to improve the received optical power and further ...
Tian Cao +4 more
semanticscholar +1 more source
Impact time and angle constrained guidance via range‐based line‐of‐sight shaping
International Journal of Robust and Nonlinear Control, 2022In this article, impact time and angle constrained guidance law is proposed using a range‐based line‐of‐sight (LOS) shaping strategy. The relative motion of missile and target is described in a polar coordinate, where the LOS angle can be shaped as a ...
Yadong Chen +4 more
semanticscholar +1 more source
2023
Perspective, color and rhythm are the basic elements I lend to create my abstract aesthetic form. I seek subject matter that is both of the aesthetic and of the world. Spontaneity is achieved through the collage technique I have adopted. This technique uses magazine color fields and textures out of context to create contemporary image fragments into ...
openaire +1 more source
Perspective, color and rhythm are the basic elements I lend to create my abstract aesthetic form. I seek subject matter that is both of the aesthetic and of the world. Spontaneity is achieved through the collage technique I have adopted. This technique uses magazine color fields and textures out of context to create contemporary image fragments into ...
openaire +1 more source
Line-of-Sight MIMO Systems: DoF Analysis and Hybrid Beamforming Design
IEEE Internet of Things JournalA millimeter wave (mmWave) line-of-sight (LOS) multi-input-multioutput (MIMO) system is studied, where spatial multiplexing is achieved through LOS transmissions in near-field areas.
Ruihao Song +6 more
semanticscholar +1 more source