Results 81 to 90 of about 73,181 (230)

Fluorene‐based blue emitters: On the path to electrically pumped organic lasers

FlexMat, EarlyView.
Electrically pumped efficient operation remains unrealized, a major challenge in optoelectronics. Fluorene‐based blue‐emitting semiconductors are promising gain media, thanks to their structural tunability and favorable emission properties. This review summarizes recent advances, highlights their reliability and versatility in lasing, and outlines key ...
Yong Yan, Hao Li, Mengna Yu, Huiyin Wang, Jiangqiang He, Menghan Wu, Quanyou Feng, Linghai Xie   +7 more
wiley   +1 more source

High‐performance heat‐resistant tactile sensor for intelligent sensing and safe operation

FlexMat, EarlyView.
Abstract Tactile sensing in high‐temperature environments remains a critical challenge for robotic systems operating in industrial manufacturing, food processing, and other high‐temperature assembly operations. Herein, we report a heat‐resistant flexible tactile sensor with comprehensive high performance, featuring a hierarchical architecture ...
Yugang Chen, Shasha Wang, Haopeng Wang, Xun Fu, Qifei Lv, Shuting Xie, Yan Li, Jiangtian Tan, Linghai Xie   +8 more
wiley   +1 more source

The research progress in polyethylene oxide polymer electrolytes

FlexMat, EarlyView.
Polyethylene oxide (PEO) has become the mainstream matrix material for solid polymer electrolytes (SPEs) due to its excellent lithium salt complexation ability and processability. However, its high crystallinity results in low ionic conductivity at room temperature and difficulty in suppressing lithium dendrite growth, which significantly hinders the ...
Ying Wei, Yueting Pu, Zheng Zhang, Yang Li, Cheng Yang, Fangju Tao, Xinxin Han, Fangfang Wu, Linghai Xie   +8 more
wiley   +1 more source

Spectral noise in quantum frequency down-conversion from the visible to the telecommunication C-band

, 2019
We report a detailed study of the noise properties of a visible-to-telecom photon frequency converter based on difference frequency generation (DFG). The device converts 580 nm photons to 1541 nm using a strong pump laser at 930 nm, in a periodically ...
Afzelius, Mikael, Gisin, Nicolas, Martin, Anthony, Strassmann, Peter C.   +3 more
core   +2 more sources

Monitoring and assessment for obstructive sleep apnea

FlexMat, EarlyView.
This review systematically classifies Obstructive Sleep Apnea (OSA) monitoring indicators into three categories: physical, biochemical, and electrophysiological indicators, and lists several methods for each category. Abstract Obstructive sleep apnea (OSA) is a common chronic sleep‐disordered breathing disease characterized by recurrent upper airway ...
Yaowen Xu, Feifei Lin, Shujiao Chen, Zhen You, Shujing Zhu, Weiwei Zhao, Qiang Zhao   +6 more
wiley   +1 more source

Optimisation of connections to a fibre network [PDF]

Stronger competition together with the development of new technologies have forced the Telecom Service Providers (TSP's) in the Netherlands to look for sophisticated optimisation methods to reduce the costs of their communication services especially for ...
Groot, J.D. de, Leegwater, D.K.
core   +1 more source

A Deep Learning Framework for Forecasting Medium‐Term Covariance in Multiasset Portfolios

Journal of Forecasting, EarlyView.
ABSTRACT Forecasting the covariance matrix of asset returns is central to portfolio construction, risk management, and asset pricing. However, most existing models struggle at medium‐term horizons, several weeks to months, where shifting market regimes and slower dynamics prevail.
Pedro Reis, Ana Paula Serra, João Gama
wiley   +1 more source

Radio frequency optimization of a Global System for Mobile (GSM) network [PDF]

, 2008
Includes bibliographical ...
Sharma, Bishal
core  

A Fair and Efficient Packet Scheduling Scheme for IEEE 802.16 Broadband Wireless Access Systems

, 2010
This paper proposes a fair and efficient QoS scheduling scheme for IEEE 802.16 BWA systems that satisfies both throughput and delay guarantee to various real and non-real time applications.
Chowdhury, Prasun, Misra, Iti Saha
core   +2 more sources

Beyond the Bin: The Effect of Waste Reduction on Real Earnings Management

International Journal of Finance &Economics, EarlyView.
ABSTRACT We investigate the effect of waste management strategies on real earnings management. Using a sample of 6515 firm‐year observations from 22 countries spanning the 2011–2022 period, we show that companies that reduce their waste generation are less likely to engage in real earnings management, supporting the ethical theoretical perspective ...
Faten Lakhal, Assil Guizani, Khaled Ghozzi, Khaled Hussainey   +3 more
wiley   +1 more source