Results 61 to 70 of about 1,449,714 (389)

Primary Beam and Dish Surface Characterization at the Allen Telescope Array by Radio Holography

, 2011
The Allen Telescope Array (ATA) is a cm-wave interferometer in California, comprising 42 antenna elements with 6-m diameter dishes. We characterize the antenna optical accuracy using two-antenna interferometry and radio holography. The distortion of each
Ackermann, R. F., ATA GROUP, Atkinson, Shannon, Backer, D. C., Backus, P. R., Barott, William, Bauermeister, Amber, Blair, Samantha K., Blitz, Leo, Bock, D. C. -J., Bower, Geoffrey C., Bradford, Tucker, Cheng, Calvin, Croft, Steve, Davis, M. M., DeBoer, D. R., Dexter, Matt, Dreher, John, Engargiola, Greg, Fields, Ed, Forster, J. R., Gutierrez-Kraybill, Colby, Harp, G. R., Heiles, Carl, Helfer, Tamara, Jordan, Jane, Jorgensen, Susan, Keating, Garrett, Kilsdonk, Tom, Law, Casey, Lugten, John, MacMahon, D. H. E., McMahon, Peter, Milgrome, Oren, Nadler, Z. J., Pierson, Tom, Randall, Karen, Ross, John, Shostak, Seth, Siemion, Andrew, Smolek, Ken, Tarter, J. C., Thornton, Douglas, Urry, Lynn, Welch, W. J., Werthimer, Dan, Whysong, David, Williams, Peter K. G., Wright, M. C. H.   +48 more
core   +1 more source

Correction to: A Compact Reconfigurable Antenna for UWB and Cognitive Radio Applications [PDF]

, 2022
Deeplaxmi V. Niture, S. P. Mahajan
openalex   +1 more source

Infrared Neural Stimulation Elicits Distinct Molecular Pathways in Astrocytes Based on Laser Pulse Parameters

Advanced Biology, EarlyView.
Infrared (IR) light evokes distinct calcium and water transport responses in astrocytes, depending on stimulation duration and protocol. This study uses widefield imaging and pharmacology to reveal differential engagement of astroglial signaling pathways.
Wilson R. Adams, Ana I Borrachero‐Conejo, Pratheepa Kumari Rasiah, Emanuela Saracino, Roberto Zamboni, Eric Duco Jansen, Valentina Benfenati, Anita Mahadevan‐Jansen   +7 more
wiley   +1 more source

MULTIFUNCTIONAL ANTENNA DEVICE FOR PROTECTION OF RADIO COMMUNICATION CHANNELS OF UNITS OF LAW ENFORCEMENT FORCES

Сучасні інформаційні системи, 2020
Safe conduct of mass events requires from law enforcement forces to protect the units’ radio communication channels, detection and suppression of counterparty control radio channel.
Valentyn Kozlov, Yury Kozlov, Olexander Shcherbina, Olena Novykova, Olexander Iokhov   +4 more
doaj   +1 more source

Research on discharge spark safety of equivalent receiving antenna of underground metal structure

Gong-kuang zidonghua, 2021
The metal structures distributed in underground coal mine roadways can be equivalent to the receiving antenna to absorb electromagnetic wave energy and release the energy in the form of discharge sparks under specific conditions.
LIU Xiaoyang1, MA Xinyan1, TIAN Zijian1, CHEN Wei2, WANG Shuai1, HU Zongqun1   +5 more
doaj   +1 more source

Systems and methods for determining radio frequency interference [PDF]

, 1978
The presence, frequency and amplitude of radio frequency interference superimposed on communication links originating from a terrestrial region and including a relay in a geostationary spacecraft are determined by pointing a narrow beam antenna on the ...
Henry, V. F., Johannsen, K. G., Sabaroff, S.   +2 more
core   +1 more source

Laser radio transmitter

, 2019
Since the days of Hertz, radio transmitters have evolved from rudimentary circuits emitting around 50 MHz to modern ubiquitous Wi-Fi devices operating at gigahertz radio bands.
Belyanin, Alexey, Capasso, Federico, Chevalier, Paul, Connors, Michael K., McNulty, Daniel, Piccardo, Marco, Rubin, Noah A., Schwarz, Benedikt, Tamagnone, Michele, Wang, Christine A., Wang, Yongrui   +10 more
core   +2 more sources

Radiodetection of Cosmic Ray Extensive Air Showers [PDF]

, 2004
We present the characteristics and performance of a demonstration experiment devoted to the observation of ultra high- energy cosmic ray extensive air showers using a radiodetection technique. In a first step, one antenna narrowed band filtered acting as
Ardouin, D., Belletoile, A., Charrier, D., Collaboration, the Codalema, Dallier, R., Denis, L., Eschstruth, P., Gousset, T., Haddad, F., Lamblin, J., Lautridou, P., Lecacheux, A., Monnier-Ragaiggne, D., Rahmani, A., Ravel, O.   +14 more
core   +4 more sources

Instrumentation for Radio Interferometers with Antennas on a Regular Grid [PDF]

, 2022
Deepthi Gorthi
openalex   +1 more source

Enhancing Corrosion Resistance and Mechanical Strength of 3D‐Printed Iron Polylactic Acid for Marine Applications via Laser Surface Texturing

Advanced Engineering Materials, EarlyView.
Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat, Mojtaba Karamimoghadam, Mohammadreza Lalegani Dezaki, Ali Zolfagharian, Giuseppe Casalino, Antonio Mateo, Mahdi Bodaghi   +6 more
wiley   +1 more source