Results 41 to 50 of about 1,857,656 (210)

Spectral‐Integrated Thermal Absorption Model for Broadband Laser‐Protective Reflectors Under Supercontinuum Irradiation

Advanced Science, EarlyView.
A universal laser absorption model based on spectral integration enables the design of ultrabroadband dielectric multilayer reflectors for laser protection. The model reveals exponential decay of absorption characterized by two coefficients, and a design that prioritizes short‐wavelength reflection minimizes heating.
Yukang Feng, Yanzhi Wang, Yulin Zhang, Yesheng Lu, Yu Chen, Fanxin Meng, Huisong Hu, Zhongyang Xing, Jianda Shao   +8 more
wiley   +1 more source

Boosting Photo‐Pyroelectric Effect via Tunable Polarization and Interfacial Defect Engineering

Advanced Science, EarlyView.
This study reports Ba(Ti0.85Zr0.15)O3 nanocatalysts with enhanced polarization and oxygen‐vacancy‐rich interfaces for efficient NIR‐II photo‐pyroelectric therapy. Zr doping boosts the pyroelectric coefficient and accelerates polarization switching, while oxygen vacancies improve photothermal conversion and surface reactivity.
Yanli Huang, Haifen Luo, Jie Yin, Shuai Cao, Gaolei Dong, Zhi Tan, Chunlin Zhao, Peiye Wen, Fengwei Sun, Shan Zhang, Xianzeng Zhang, Yunlu Dai, Zhen Yang, Wei Huang   +13 more
wiley   +1 more source

Implications of the 2022–2023 Situation in Ukraine for Possible Nuclear Weapons Use in Northeast Asia

Journal for Peace and Nuclear Disarmament, 2023
The Russian invasion of Ukraine in February of 2022, and the ongoing (as of this writing) conflict that has followed, has prompted many of the actors responsible for determining military and nuclear weapons strategy and policy to rethink their approaches.
David von Hippel
doaj   +1 more source

Contests of legitimacy and value: the Treaty on the Prohibition of Nuclear Weapons and the logic of prohibition

International Affairs, 2019
The recently adopted Treaty on the Prohibition of Nuclear Weapons (TPNW) has caused much debate and controversy in global nuclear politics. Given that the stated goal of the TPNW supporters (states and NGOs alike) is to embed the treaty in the ...
L. Considine
semanticscholar   +1 more source

Photonuclear Population of 229m,gTh in Th‐Doped Crystals Toward Nuclear Clock Development

Advanced Science, EarlyView.
This study demonstrates a novel photonuclear approach for producing the nuclear clock isomer 229mTh in thorium‐doped crystals, overcoming current supply limitations. Through cross‐section calculations and Monte Carlo simulations, we identify optimal crystal materials and irradiation conditions, achieving high signal‐to‐noise ratios.
Hao‐Yang Lan, Di Wu, Mei‐Zhi Wang, Zhong‐Yi Chen, Jian‐Feng Lv, Yu‐Hui Xia, Zhe‐Nan Wang, Wen Luo, Xin‐Lu Xu, Xue‐Qing Yan   +9 more
wiley   +1 more source

Information retrieval or document retrieval? Terminological confusions and unrealistic goals in information science, exemplified in relation to generative artificial intelligence

Journal of the Association for Information Science and Technology, EarlyView.
Abstract ChatGPT and related technologies have revived an old issue in information science (IS) concerning information retrieval (IR) versus document retrieval. Since 1950, the term IR has primarily been used as a misnomer for document retrieval. This problematic terminology reflects a desire to go beyond documents and provide, in response to user ...
Birger Hjørland
wiley   +1 more source

International security regimes in preventing the spread of nuclear armaments and their global significance

Vojnotehnički Glasnik
Introduction/purpose: The paper provides an overview of international regimes and agreements that aimed to halt the spread of nuclear weapons. For each regime, its impact on nuclear weapons proliferation is presented, as well as its significance in ...
Srećko D. Ilić, Radоvan V. Radovanović, Aleksandar S. Ivković   +2 more
doaj   +1 more source

To protect and preserve? Explaining the gap between structural and superficial racial equality regimes in North Atlantic Rim universities

British Educational Research Journal, EarlyView.
Abstract This article examines how UK and US universities manage racial equality regimes through governance structures that prioritise institutional reputation over substantive racial justice reform. Drawing on Bourdieu's field, habitus and capital theory, the study demonstrates how universities neutralise racial justice efforts through bureaucratic ...
David Roberts
wiley   +1 more source

Potential Use of Low-Yield Nuclear Weapons in a Korean Context

Journal for Peace and Nuclear Disarmament, 2022
This report explores the potential uses of low-yield nuclear weapons in the context of a possible conflict on the Korean Peninsula. It starts with a definition of low-yield weapons – typically, weapons with yields of ten kilotons or less that are ...
Eva Lisowski
doaj   +1 more source

Prioritizing Feasible and Impactful Actions to Enable Secure AI Development and Use in Biology

Biotechnology and Bioengineering, EarlyView.
ABSTRACT As artificial intelligence continues to enhance biological innovation, the potential for misuse must be addressed to fully unlock the potential societal benefits. While significant work has been done to evaluate general‐purpose AI and specialized biological design tools (BDTs) for biothreat creation risks, actionable steps to mitigate the risk
Josh Dettman, Emily Lathrop, Aurelia Attal‐Juncqua, Matthew Nicotra, Allison Berke   +4 more
wiley   +1 more source