Results 71 to 80 of about 214,379 (306)

Development of a Sulfinamide Crossover Reaction

This study unveils a new catalytic crossover reaction of sulfinamides. Leveraging mild acid catalysis, the reaction demonstrates high tolerance to structural variations, yielding equimolar products across diverse sulfinamide substrates.
Jiri, Misek, Vladimir , Nosek
core   +1 more source

Invisible Polymer Walls Enhance Reorientational Optical Nonlinearity in Oligothiophene‐Doped Liquid Crystals

Advanced Functional Materials, EarlyView.
The polymer wall stabilized dye‐doped liquid crystals (PWLCs) enhance the sensitivity of photoinduced molecular reorientation in dye‐doped LC systems. The PWLC with an invisible polymer wall successfully reduces the threshold intensity and functions as an optical limiter under the incidence of low intensity light laser source.
Junki Yokota, Yuya Nakata, Erika Katayama, Miho Aizawa, Kyohei Hisano, Shoichi Kubo, Atsushi Shishido   +6 more
wiley   +1 more source

Short-term effects of ambient ozone on pediatric pneumonia hospital admissions: a multi-city case-crossover study in China

Environmental Health and Preventive Medicine
Background: Children’s respiratory health demonstrates particular sensitivity to air pollution. Existing evidence investigating the association between short-term ozone (O3) exposure and childhood pneumonia remains insufficient and inconsistent ...
Huan Wang, Huan-Ling Zeng, Guo-Xing Li, Shuang Zhou, Jin-Lang Lyu, Qin Li, Guo-Shuang Feng, Hai-Jun Wang   +7 more
doaj   +1 more source

Hierarchical Crossover in Genetic Algorithms

, 1996
This paper identifies the limitations of conventional crossover in genetic algorithms when operating on two chromosomes of differing lengths. To address these problems, the concept of a Semantic Hierarchy (i.e.
P. J. Bentley, Wakefield, Jonathan P., J. P. Wakefield, Bentley, Peter J.   +3 more
core  

Solution‐Processed Thin‐Film Transistors With Tunable Temporal Dynamics for Neuromorphic Computing

Advanced Functional Materials, EarlyView.
Solution‐processed CNT and CNT/P3HT ion‐gated transistors exhibit materials‐defined synaptic timescales: fast CNT devices for high‐frequency spiking and slow hybrid devices for temporal integration. Embedding these dynamics into coupled reservoir‐computing and spiking neural network simulations reveals that a Hybrid‐Reservoir / CNT‐SNN architecture ...
Kevin Schnittker, Haoyi Lin, Zahra Bahrami, Strahinja Marinkovic, Sung Hyun Lee, Joseph Andrews   +5 more
wiley   +1 more source

The association of cold weather and all-cause and cause-specific mortality in the island of Ireland between 1984 and 2007 [PDF]

, 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work ...
McAvoy, H, Goodman, Patrick, Zeka, A, Browne, Stephen, Goodman, P, McAvoy, Helen, Browne, S, Zeka, Ariana   +7 more
core   +1 more source

Twin Crystal Moiré Metasurfaces for Crossing Flat‐Band Transport

Advanced Functional Materials, EarlyView.
This study introduces twin crystal moiré metasurfaces, breaking in‐plane symmetry to enable reconfigurable acoustic wave manipulation. By adjusting the twin angle and interlayer twist angle, various combinations of hyperbolic, flat bands, and elliptic states can be synthesized in the system.
Shida Fan, Chenglin Han, Kuan He, Chadi Ellouzi, Yunlong Wang, Li‐Qun Chen, Jie Sun, Zhaodong Xu, Chen Shen, Tianzhi Yang   +9 more
wiley   +1 more source

Sample size estimation for case‐crossover studies

Statistics in Medicine, 2018
Case‐crossover study designs are observational studies used to assess postmarket safety of medical products (eg, vaccines or drugs). As a case‐crossover study is self‐controlled, its advantages include better control for confounding because the design controls for any time‐invariant measured and unmeasured confounding and potentially greater ...
Sai Dharmarajan, Joo‐Yeon Lee, Rima Izem   +2 more
openaire   +4 more sources

Crossover Inventions And Knowledge Diffusion Of General Purpose Technologies? Evidence From The Electrical Technology [PDF]

Scholars have long noted the significant impact of general purpose technologies (GPTs) on the economy. However, limited attention has been paid to exploring how they are employed to generate inventions in downstream sectors (crossover inventions), and ...
Shih-tse Lo, Dhanoos Sutthiphisal
core  

Histone variant H2A.W7 represses meiotic crossover formation in Arabidopsis heterochromatin

In eukaryotic genomes, DNA is packaged into nucleosomes to form chromatin. The incorporation of canonical or variant histones into nucleosomes confers different properties and influences chromatin structure to regulate cellular processes, including ...
Zhong, Z., Henderson, I. R., Lambing, C., Liu, X., Topp, S. D., Kuo, P., Tock, A. J.   +6 more
core   +1 more source