Results 41 to 50 of about 601,761 (190)

Aphasic status epilepticus presenting with prominent psychiatric symptoms: A case report

Psychiatry and Clinical Neurosciences Reports, Volume 5, Issue 4, December 2026.
Abstract Background Aphasic status epilepticus (ASE) is a subtype of nonconvulsive status epilepticus characterized by aphasia as its primary ictal manifestation. Although psychiatric symptoms are uncommon in ASE, they may obscure the diagnosis when present. We report an atypical case, presenting predominantly with agitation and irritability, which was
Yuto Yamada, Shigeru Takahashi, Masaki Fujiwara   +2 more
wiley   +1 more source

An optimized dual-polarized quad-ridges horn antenna with pyramidal sidewalls [PDF]

, 2013
Dissertation (MEng)--University of Pretoria, 2013.It is well known that quad-ridged horn antennas in general have impedance and radiation characteristics that are significantly worse than that of their double-ridged counterparts.

core   +1 more source

A Nearly Perfect Implementation of a Broadband Optical Null Media via Space‐Folding

Laser &Photonics Reviews, Volume 20, Issue 21, 6 November 2026.
A space‐folding optical null medium with impedance‐matching layers enables broadband directional wave projection and wavefront engineering. By tailoring the folding ratio and dilution ratio, the structure maintains near‐unity transmittance over 5–9 GHz.
Yichao Liu, Jiale Li, Fei Sun, Qin Liao
wiley   +1 more source

Energy Transfer Using Gradient Index Metamaterial

International Journal of Antennas and Propagation, 2018
The gradient refractive index structure in this paper is used to increase the quantum of energy transfer. This is done by improving the directive gain of the pyramidal horn antenna at a frequency of 10 GHz.
Boopalan Ganapathy, Subramaniam Chittur Krishnaswamy   +1 more
doaj   +1 more source

Experimental Multipath-Cluster Characteristics of 28-GHz Propagation Channel

IEEE Access, 2015
In this paper, a channel measurement campaign is introduced, which utilizes direction-scan-sounding to capture the spatial characteristics of 28-GHz wave propagation channels with 500-MHz sounding bandwidth in office environments.
Xuefeng Yin, Cen Ling, Myung-Don Kim
doaj   +1 more source

Analysis of Pyramidal Horn Antenna for J-Band Application

, 2016
In this research paper, design and development of pyramidal horn antenna for J-band application is reported. It is particularly designed for 17 dB gain and half beam width about 25 degrees at 6.93 GHz. Horn aperture, horn axial length and distance from the throat of the antenna to aperture are the main design constraints which are calculated and used ...
Muralidhar Bhanarkar, Ganesh Waghmare, Vaijjanath Navarkhele   +2 more
openaire   +2 more sources

Spatial patterns in prey relative abundance suggest top‐down effects at juvenile white shark aggregation sites

Ecosphere, Volume 17, Issue 10, October 2026.
Abstract Predators regulate prey populations across ecosystems, driving heterogeneity in prey distribution through both direct consumption and indirect “fear” effects. Such effects generally demonstrate a positive relationship with predator density and length of exposure to predation. Juvenile white sharks (Carcharodon carcharias; JWS) are a generalist
Zachariah S. Merson, Elizabeth E. Jahn, Matthew A. Barnes, Emily A. Spurgeon, Patrick T. Rex, Jack T. Elstner, Yamilla N. Samara Chacon, James M. Anderson, Whitney D. Jones, Christopher G. Lowe   +9 more
wiley   +1 more source

A Simple Approach to Select the Optimum Design Frequency for Pyramidal Horn Antenna Design

The Journal of Engineering
In this paper, a simple procedure is proposed to select the optimum design frequency for the horn antenna design by combining theory and simulation. The gain of horn antennas often increases and the aperture efficiency decreases while the frequency of ...
Abolfazl Azari, Hadi Aliakbarian
doaj   +1 more source

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, Volume 43, Issue 7, Page 4475-4514, October 2026.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

Reducing Motion Artifact in High Resolution 7 T MRI Using the Magnetic Resonance Minimal Motion (“MR‐MinMo”) Head Stabilization Device

Magnetic Resonance in Medicine, Volume 96, Issue 3, Page 1486-1501, September 2026.
ABSTRACT Purpose To evaluate the effectiveness of the MR‐MinMo head stabilization device in mitigating motion artifacts during long‐duration, high‐resolution 7 T MRI scans, with and without retrospective motion correction Methods The MR‐MinMo was tested on seven pediatric and 12 adult healthy volunteers using 0.6 mm isotropic, 3D Multi‐Echo Gradient ...
Jyoti Mangal, Simon Richardson, Yannick Brackenier, Matthew Gardner, Pierluigi Di Cio, Chiara Casella, Shaihan Malik, Jo Hajnal, Martina F. Callaghan, Fred Dick, David W. Carmichael   +10 more
wiley   +1 more source