Results 191 to 200 of about 70,174 (264)

Delay Correction Method Based on VLF Timing Signal Phase Variation Model. [PDF]

Sensors (Basel)
Ma X, Yan W, Hu Z, Yuan J, Hua Y, Li S.
europepmc   +1 more source

Pressure‐Driven Phase Transition Unlocking Unique Eu2+ Luminescence in Li2SrSiO4 for Optical Sensing and White‐LEDs

Advanced Science, EarlyView.
This study demonstrates, for the first time, the use of a large‐format high‐pressure press to modify synthesized Li2SrSiO4:Eu2+,Cs+ phosphors after its preparation. The pressure treatment results in the formation of new materials with distinctive optical properties, opening pathways for the development of advanced LED devices and high‐performance ...
Przemysław Woźny, Peng Du, Teng Zheng, Junpeng Xue, Liang Peng, Shuailing Ma, Szymon Sobczak, Victor Lavín, Tian Cui, Marcin Runowski   +9 more
wiley   +1 more source

Enhanced optical visible light positioning via RSS-based evolutionary optimization under LOS and NLOS conditions. [PDF]

Sci Rep
Pathak P, Sharavanan S, Karthikeyan M, Mubarakali A, Arun Kumar U.   +4 more
europepmc   +1 more source

Extreme‐Thickness Meta‐Membrane for Controlling Terahertz Vectorial Beams

Advanced Science, EarlyView.
We propose ultra‐thin (λ/30) transmissive terahertz metasurfaces combining near‐field resonant and detour phases in coupled‐slit meta‐atoms, enabling continuous phase and polarization control beyond conventional designs. Based on leaky‐mode theory, scalar and vectorial terahertz Bessel beams at 0.39 THz are experimentally demonstrated, with ...
Yufei Song, Yixiang Xu, Yikai Xu, Yuanxi Liu, Shaojie Ma, Qiong He, Zhuo Wang, Lei Zhou   +7 more
wiley   +1 more source

Improving QoS for streaming data transmission over 6G networks using reconfigurable intelligent surfaces (RIS). [PDF]

Sci Rep
Ibrahim HM, Shiha MM, Nasr ME, Napoleon SA.   +3 more
europepmc   +1 more source

Stress Accumulation Induced by Ion Exchange for Synchronous Modulation of Mode and Wavelength in Microlasers

Advanced Science, EarlyView.
This work demonstrates a paradigm‐shifting strategy to simultaneously achieve broadband wavelength tunability and single‐mode control within a single perovskite microwire structure. Using a facile heating‐assisted solid–solid anion‐exchange strategy, we synthesized phase‐pure CsPbClxBr3‐x microwires that exhibit the widest reported continuous lasing ...
Bingwang Yang, Lingling Sun, Jinhui Wang, Jitao Li, Peng Wan, Daning Shi, Caixia Kan, Mingming Jiang   +7 more
wiley   +1 more source

Ground Penetrating Radar for Subsurface Utility Detection: Methods, Challenges, and Future Directions. [PDF]

Sensors (Basel)
Gao S, Hu D.
europepmc   +1 more source

Unusual Thermally Induced Blueshift and Emission Amplification of Mn2+ Ions Enable Filter‐Free Luminescent Thermal Imaging

Advanced Science, EarlyView.
ABSTRACT The shift from point‐based thermal sensing to filter‐free thermal imaging requires luminescent thermometers that exhibit pronounced and thermally driven spectral changes within spectral regions matching the sensitivity profiles of the red, green and blue (RGB) channels of a digital camera.
Y. Abe, M. Szymczak, J. Zeler, L. Marciniak   +3 more
wiley   +1 more source

Tumor Detection and Characterization Using Microwave Imaging Technique-An Experimental Calibration Approach. [PDF]

Sensors (Basel)
Nair AJ, Rajagopalan S, Radhakrishna Pillai NK, Donelli M, Menon SK.   +4 more
europepmc   +1 more source

Photoelectric‐Coupled Ferroelectric Heterojunctions for Ultrahigh NO2 Sensing With Polarization‐Memory‐Assisted Interfacial Modulation

Advanced Science, EarlyView.
This study demonstrates a Bi2WO6/SrBi2Ta2O9 heterojunction where light‐driven ferroelectric polarization reversal couples with persistent photoconductivity, enabling exclusive NO2 selective room‐temperature sensing. The device achieves a two‐order‐of‐magnitude sensitivity enhancement over an unpolarized device, a sub‐ppb detection limit, and robust ...
Liping Tan, Xuefeng Hu, Ming Zhou, Weiwei Qing, Along Li, Zilong Wang, Mudan Feng, Shuang Zhao, Xiaoliang Wang, Peipei Li, Yali Bi, Wei Zhang   +11 more
wiley   +1 more source