Results 131 to 140 of about 2,972,655 (297)

National security

, 2021
openaire   +3 more sources

Speckle‐Engineered Upconversion Amplification in Nanoemulsion‐Templated Hydrogel Microdomes

Advanced Functional Materials, EarlyView.
Nanoemulsion‐confined PEGDA microdomes generate speckle‐like excitation fields that strongly amplify upconversion luminescence upon dehydration, enabling filter‐free visible readout with reversible on–off switching. DMD‐based lithography yields scalable, shape‐programmable arrays for moisture‐responsive displays and optical encryption.
Chaeyeong Ryu, Byungcheon Yoo, Seunghun Lee, Hyungyo Jeong, Sanggyun Jeong, Heesu Cho, Jongwon Oh, Dahye Baek, Jongkyu Kim, Yubin Lee, Eunsu Gu, Dong‐Hwan Kim, Jung‐Hoon Park, Jiseok Lee   +13 more
wiley   +1 more source

Opinion mining for national security: techniques, domain applications, challenges and research opportunities. [PDF]

J Big Data, 2021
Razali NAM, Malizan NA, Hasbullah NA, Wook M, Zainuddin NM, Ishak KK, Ramli S, Sukardi S.   +7 more
europepmc   +1 more source

Robust Polymer Hydrogels Improve Electric‐Fish‐Inspired Batteries

Advanced Functional Materials, EarlyView.
ABSTRACT Electric‐fish‐inspired hydrogel batteries based on ion‐concentration gradients offer an attractive route to soft power sources; however, the poor mechanical properties of existing hydrogels limit device assembly and performance. Here, we report poly(ethylene glycol) methyl ether acrylate hydrogels that enable ion‐gradient batteries composed of
Nick Zahnd, Satyajit Das, John Marc C. Puguan, Carolina Pierucci, Michael Mayer, Christoph Weder   +5 more
wiley   +1 more source

Lightweight deep learning model for crime pattern recognition based on transformer with simulated annealing sparsity and CNN

Scientific Reports
This study addresses the pressing need for high efficiency and low resource consumption in crime pattern recognition within public safety governance by proposing a lightweight deep learning model known as the lightweight crime recognition network (LCRNet)
HongYuan Lu, ChengXin Chen, YuQi Ma, YanMing Ma   +3 more
doaj   +1 more source

Neurodiversity and National Security: How to Tackle National Security Challenges with a Wider Range of Cognitive Talents.

Rand Health Q, 2023
Weinbaum C, Khan O, Thomas TD, Stein BD.
europepmc   +1 more source

Metachromatic Butterfly Bile Pigments for Multi‐Level Optical Security Films

Advanced Functional Materials, EarlyView.
Bio‐derived optical security materials are manufactured by embedding butterfly‐based pigments in polymer films. Tunable color and fluorescence responses arise from concentration‐controlled metachromasy, enabling spatially encoded patterns with distinct visible, UV‐active, and spectral signatures.
Limin Wang, Bodo D. Wilts
wiley   +1 more source

Impacts of COVID-19 pandemic on national security issues: Indonesia as a case study. [PDF]

Secur J, 2022
Alam MM, Fawzi AM, Islam MM, Said J.
europepmc   +1 more source

Security After 9/11: Strategy Choices and Budget Tradeoffs [PDF]

, 2003
The White House issued a National Security Strategy document in 2002 that stated the nation's new foreign policy and national security policy goals. Are the choices it identifies the right choices, and how best should resources be allocated to reach ...

core  

Biocompatible but Antibacterial Mechanism of Graphene Oxide for Sustainable Antibiotics

Advanced Functional Materials, EarlyView.
Graphene oxide (GO) exhibits selective antibacterial activity through specific interactions between its oxygen functional groups and bacterial membrane phospholipid POPG, causing membrane destabilization while maintaining biocompatibility. Model membrane studies and infected wound models in mice and pigs demonstrate effective bacterial suppression and ...
Sujin Cha, Ju Yeon Chung, Seungju Yang, Seung Cheol Lee, Chan Woo Lee, Colin Wing‐Lok Cheng, Jun Beom Kim, Nam Jun Kim, Ayoung Park, Heewon Choi, Junpyo Sinn, Ralph Weissleder, Nicholas A. Kotov, Myungeun Seo, Hyun Jung Chung, Sang Ouk Kim   +15 more
wiley   +1 more source