Results 91 to 100 of about 47,639 (261)

Novel Sulfur‐Rich Polymers from Inverse Vulcanization as Functional Building Blocks for Photonics

Macromolecular Rapid Communications, EarlyView.
Isopropenyl aromatic comonomers, in particular novel 2,7‐diisopropenylfluorene and 2,8‐diisopropenyldibenzothiophene, synthesized by sustainable, facile, single‐step SMCCR from available brominated substrates are exploited in the Inverse Vulcanization process to obtain functional Sulfur‐rich macromolecular materials.
Raimondo Insogna, Fabiano Martorelli, Daniela Di Fonzo, Martina Martusciello, Roberto Utzeri, Angelo Angelini, Davide Comoretto, Paola Stagnaro   +7 more
wiley   +1 more source

Transforming Fabry-Perot resonances into a Tamm mode

, 2012
We propose a novel photonic structure composed of metal nanolayer, Bragg mirror and metal nanolayer. The structure supports resonances that are transitional between Fabry-Perot and Tamm modes.
Durach, Maxim, Rusina, Anastasia
core   +1 more source

Mechanistic Insights of Support Dynamics During Reactive Metal‐Support Interaction

Small Methods, EarlyView.
This study uses in situ environmental scanning transmission electron microscopy to investigate the reduction of PdO nanoparticles on ZnO and the formation of intermetallic ZnPd. Hydrogen spillover activates the ZnO support, inducing encapsulation and Zn reduction.
Ansgar Meise, Hiroaki Matsumoto, Marc Botifoll, Rafal E. Dunin‐Borkowski, Marc Armbrüster, Marc Heggen   +5 more
wiley   +1 more source

Dispersion‐Enhanced Nitrogen‐Centered Photocatalysis of the Direct Hydrogen Atom Transfer

Angewandte Chemie, Volume 138, Issue 6, 2 February 2026.
Nitrogen‐centered acridine photocatalysts for direct hydrogen atom transfer have been developed, leveraging dispersion interactions to enhance photocatalytic activity. This approach enables diverse functionalization reactions of strong C─H bonds even under cryogenic conditions and provides a new strategy for boosting the efficiency of direct HAT ...
Jiasong Zhang, Kaitong Zhuang, Ramon Trevino, Babu Raj Dhungana, Huiying Sun, Shuyu Yin, Yuting Li, Jacob A. Sanchez, Xiaoyu Xia, Ramy Elerian, Yao Sun, Seth O. Fremin, Chao Huang, Min He, Maosheng Cheng, Oleg V. Larionov, Shengfei Jin   +16 more
wiley   +2 more sources

Optically pumped GaN-based vertical cavity surface emitting laser with strain-compensated AlGaN/InGaN distributed Bragg reflector

Applied Physics Express
We proposed a strain-compensated distributed Bragg reflector (DBR) with high reflectivity and a practical growth time. The DBR consists of AlGaN/GaN multilayer as the low refractive index layer and InGaN as the high refractive index layer.
T. Kawashima, M. Kaminishi, C. Kimura, S. Sato   +3 more
doaj   +1 more source

Saturated flow boiling in small- to micro- diameter metallic tubes: Experimental results and modeling [PDF]

, 2008
Some results of a long-term study of flow boiling patterns, heat transfer rates and pressure drop of R134a at pressures of 6-14 bar in five vertical stainless steel tubes of internal diameter 4.26, 2.88, 2.01, 1.1 and 0.52 mm are presented in this paper.
Karayiannis, TG, Kenning, DBR, Shiferaw, D   +2 more
core  

Efficient single frequency fibre lasers using novel photosensitive Er/Yb optical fibres

, 1997
Boron- and germanium-doped highly photosensitive cladding is used in a novel design to achieve photosensitive Er/Yb-doped fibers, permitting short, strong gratings (length ~1cm, reflectivity >99%) to be written without hydrogenation.
Caplen, J.E., Dong, L., Hsu, K., Loh, W.H., Minelly, J.D., Reekie, L.   +5 more
core   +1 more source

Optical properties of DBR-lasers.

The Review of Laser Engineering, 1989
We have fabricated the InGaAsP/InP DBR-lasers with the wavelength range of 1.5μm, and investigated their optoelectronic properties. High sub-mode suppression ratios of exceeding 35 dB, and very narrow spectral linewidths less than 10 MHz were obtained. Wavelengthtuning was performed by an injection of tuning current in Bragg reflector region.
Mitsuo TAKAHASHI, Manabu YOSHIMURA, Yasunori MICHITSUJI, Hiromi NAKANISHI, Yoshimitsu YAMAZOE, Tetsuo SUGIMOTO   +5 more
openaire   +2 more sources

Suitable habitat of Himalayan wolf in Upper Mustang, Annapurna Conservation Area, Nepal

Wildlife Biology, EarlyView.
Decades ago, the Himalayan wolf Canis lupus chanco, a genetically distinct sub‐species of the gray wolf Canis lupus, faced persecution by local communities in the Nepalese Himalayas. Recently, wolf populations have returned and recolonized, sparking concerns about conflicts over livestock depredation, and emphasizing the urgent need for comprehensive ...
Deu Bahadur Rana, Jhamak Bahadur Karki, HimLal Shrestha, Thakur Silwal, Bikash Ghimire, Bikram Shrestha   +5 more
wiley   +1 more source

animal2vec and MeerKAT: A self‐supervised transformer for rare‐event raw audio input and a large‐scale reference dataset for bioacoustics

Methods in Ecology and Evolution, EarlyView.
Abstract Bioacoustic research, vital for promoting conservation and understanding animal behaviour and ecology, faces a monumental challenge: analysing vast datasets where animal vocalizations are rare. While deep learning techniques are becoming standard, adapting them to bioacoustics remains difficult.
Julian C. Schäfer‐Zimmermann, Vlad Demartsev, Baptiste Averly, Kiran L. Dhanjal‐Adams, Mathieu Duteil, Gabriella Gall, Marius Faiß, Lily Johnson‐Ulrich, Dan Stowell, Marta B. Manser, Marie A. Roch, Ariana Strandburg‐Peshkin   +11 more
wiley   +1 more source