Results 11 to 20 of about 6,827,916 (188)

Low-Level Acoustic Reflex Thresholds [PDF]

International Journal of Audiology, 1979
The acoustic reflex threshold (ART) can be detected at lower than normal sound pressure levels by means of facilitation. This procedure entails simultaneous presentation of a high frequency tone at a level just below the ART and a threshold seeking stimulus.
I M, Blood, H J, Greenberg
openaire   +2 more sources

Exploring optoelectronic properties of C-doped GaAs for photocathode application from first-principles calculation

AIP Advances, 2022
In the preparation process of negative electron affinity GaAs photocathodes, the p-type doped property is beneficial to photoemission, and the doping element is usually Be or Zn.
Xin Guo, Feng Shi, Yijun Zhang, Ruoyu Zhang, Hongjin Qiu   +4 more
doaj   +1 more source

NEA surface AlGaN heterojunction tilted nanowire array photocathode for vacuum electron sources

Journal of Materials Research and Technology, 2023
As the core component of the electron accelerator, the electron source is responsible for providing high-quality electron beams. GaN has a wide bandgap and must be driven by an ultraviolet laser, making it a strong candidate for photocathode electron ...
Xingyue Zhangyang, Lei Liu, Hongchang Cheng, Feifei Lu, Xin Guo, Jian Tian   +5 more
doaj   +1 more source

Effect of Gradient Doping on Charge Collection Efficiency of EBCMOS Devices

Advances in Multimedia, 2022
We investigated the effect of different gradient doping methods on the charge collection efficiency of the electron multiplication layer of EBCMOS devices.
Xulei Qin, Qidong Shi, Feng Shi, Ye Li, De Song   +4 more
doaj   +1 more source

Deep Water PAH Cycling in the Japan Basin (the Sea of Japan)

Journal of Marine Science and Engineering, 2022
A vertical pattern of fractionated polycyclic aromatic hydrocarbons (PAH) was studied in the Japan Basin in the Sea of Japan. The highest PAH concentration was found in the mesopelagic realm, possibly resulting from deep convection and/or subduction of ...
Yuliya Koudryashova, Tatiana Chizhova, Mutsuo Inoue, Kazuichi Hayakawa, Seiya Nagao, Evgeniya Marina, Rodrigo Mundo   +6 more
doaj   +1 more source

The Low-level Spectrum of the $W_3$ String [PDF]

, 1992
We investigate the spectrum of physical states in the $W_3$ string theory, up to level 2 for a multi-scalar string, and up to level 4 for the two-scalar string. The (open) $W_3$ string has a photon as its only massless state.
Lu, H., Nilsson, B. E. W., Pope, C. N., Stelle, K. S., West, P. C.   +4 more
core   +2 more sources

Mechanism of bright halo defects induced by electric field distortion on microchannel plate surface [PDF]

AIP Advances
Localized bright halo defects critically impair the performance of third-generation image intensifiers, presenting as central dark zones surrounded by luminous rings.
Yang Li, Yu Ma, Linyu Gan, Zhifeng Xu, Ziheng Hao, Haoyu Wu, Ze Yao, Shilong Li, Xin Guo   +8 more
doaj   +1 more source

Low power laser efficacy in the therapy of inflamed gingive in diabetics with parodontopathy [PDF]

Vojnosanitetski Pregled, 2011
Background/Aim. There is clear evidence on direct relationship between periodontal disease and diabetes mellitus. Many investigations point out greater prevalence and severity of periodontal disease among diabetic patients.
Obradović Radmila, Kesić Ljiljana, Jovanović Goran, Petrović Dragan, Radičević Goran, Mihailović Dragan   +5 more
doaj   +1 more source

Enhancement of near-infrared response for GaAs-based photocathode with laminated graded-bandgap structure: theory and experiment

Journal of Materials Research and Technology, 2022
To enhance the quantum efficiency of GaAs-based photocathode in the near-infrared range, a laminated graded-bandgap photocathode structure consisting of a distributed Bragg reflection layer and a graded-bandgap emission layer is proposed. The theoretical
Ziheng Wang, Yijun Zhang, Shiman Li, Shan Li, Jingjing Zhan, Yunsheng Qian, Feng Shi, Hongchang Cheng, Gangcheng Jiao, Yugang Zeng   +9 more
doaj   +1 more source

Exploring metal-supported few-layer graphene for photocathode application through Cs/O activation process

Journal of Materials Research and Technology, 2022
Exploring a photocathode with features of visible-light response, high quantum efficiency, long life-span, easy availability and low cost is the desire of electron source applications.
Yijun Zhang, Jingjing Zhan, Shiman Li, Song Tang, Kaimin Zhang, Ziheng Wang, Yunsheng Qian, Junju Zhang, Feng Shi, Gangcheng Jiao, Lei Yan   +10 more
doaj   +1 more source