Results 41 to 50 of about 109,795 (259)

Study on vibration response characteristics of kilometre deep shaft induced by frozen soil blasting in ultra deep alluvium

Meitan kexue jishu, 2022
With the increasing demand for underground resources in China, the construction of ultra-deep shafts is becoming more and more popular. In order to stabilize the shaft wall and reduce the collapse of the shaft wall during the shaft excavation, the ...
Jianxin YU, Lianhao ZHOU, min GUO, Zhenzhen LI, Yingcai ZHANG   +4 more
doaj   +1 more source

On the basic mechanism of Pixelized Photon Detectors

, 2008
A Pixelized Photon Detector (PPD) is a generic name for the semiconductor devices operated in the Geiger-mode, such as Silicon PhotoMultiplier and Multi-Pixel Photon Counter, which has high photon counting capability. While the internal mechanisms of the
Amsler, Corsi, H. Oide, H. Otono, Jacobi, Kagawa, Maes, Piemonte, Piemonte, Renker, S. Yamashita, T. Yoshioka   +11 more
core   +1 more source

Photoconductivity‐Driven Quantum Efficiency Gain in Inorganic Ruddlesden‐Popper Layered Cs2PbBr2I2 Perovskite Photodetector for Visible Light Detection

Advanced Functional Materials, EarlyView.
Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah, Asif Abdullah Khan, Saikiran Khamgaonkar, Majid Haji Bagheri, Danyah Khan, Md Rasidul Islam, Mahmoud Almadoun, Aixi Pan, Alexander Li, Marwa Abd‐Ellah, Vivek Maheshwari, Dayan Ban   +11 more
wiley   +1 more source

Characterization of moderate ash‐and‐gas explosions at Santiaguito volcano, Guatemala, from infrasound waveform inversion and thermal infrared measurements

Geophysical Research Letters, 2016
The rapid discharge of gas and rock fragments during volcanic eruptions generates acoustic infrasound. Here we present results from the inversion of infrasound signals associated with small and moderate gas‐and‐ash explosions at Santiaguito volcano ...
S. De Angelis, O. D. Lamb, A. Lamur, A. J. Hornby, F. W. vonAulock, G. Chigna, Y. Lavallée, A. Rietbrock   +7 more
doaj   +1 more source

Falsely normalized ankle-brachial index despite the presence of lower-extremity peripheral artery disease: two case reports

Journal of Medical Case Reports, 2021
Background The ankle-brachial index measurement is used for screening and diagnosis of lower-extremity peripheral artery disease and cardiovascular risk assessment.
Tatsuya Maruhashi, Shogo Matsui, Farina Mohamad Yusoff, Shinji Kishimoto, Masato Kajikawa, Yukihito Higashi   +5 more
doaj   +1 more source

Broadband, Flexible, Skin‐Compatible Carbon Dots/Graphene Photodetectors for Wearable Applications

Advanced Functional Materials, EarlyView.
Broadband, flexible photodetectors integrating nitrogen‐rich carbon dots with single‐layer graphene on plastic substrates are demonstrated. A biocompatible chitosan–glycerol electrolyte enables efficient low‐voltage gating and on‐skin operation. The devices exhibit ultraviolet‐to‐near‐infrared response, mechanical robustness under bending, and verified
Nouha Loudhaief, Petr Rozhin, Ilaria Bertuol, Ali Raza, Leonardo Viti, Subhankar Roy, Enrico Cavarzerani, Luca Sbuelz, Matteo Brilli, Andrea Serinolli, Jacopo Nicoletti, Riccardo Piccoli, Sebastián Castilla, Simone Dal Zilio, Enrique Rodríguez‐Castellón, Miriam Serena Vitiello, Maurizio Selva, Flavio Rizzolio, Alvise Perosa, Giovanni Antonio Salvatore, Domenico De Fazio   +20 more
wiley   +1 more source

Gravitational wave emission from binary supermassive black holes

, 2013
Massive black hole binaries (MBHBs) are unavoidable outcomes of the hierarchical structure formation process, and according to the theory of general relativity are expected to be the loudest gravitational wave (GW) sources in the Universe.
Sesana, A.
core   +1 more source

Principal component analysis of atrial fibrillation: Inclusion of posterior ECG leads does not improve correlation with left atrial activity [PDF]

, 2015
Background Lead V? is routinely analysed due to its large amplitude AF waveform. V? correlates strongly with right atrial activity but only moderately with left atrial activity. Posterior lead V? correlates strongest with left atrial activity.
Bourke, John P., Langley, Philip, Lord, Stephen, Murray, Alan, Murray, Stephen, Raine, Daniel, Shepherd, Ewen   +6 more
core   +1 more source

Coherent Control of Nitrogen Nuclear Spins via the VB−${\rm V}_B^-$‐Center in Hexagonal Boron Nitride

Advanced Functional Materials, EarlyView.
This study demonstrates coherent control of 15N nuclear spins coupled to VB−${\text{V}}_{\text{B}}^{-}$ centers in isotope‐enriched hexagonal boron nitride. Selective addressing via spin‐state mixing enables Rabi driving, quantum gates, and coherence times exceeding 10 μs$\umu{\rm s}$.
Adalbert Tibiássy, Charlie J. Patrickson, Thomas Poirier, James H. Edgar, Bruno Lopez‐Rodriguez, Viktor Ivády, Isaac J. Luxmoore   +6 more
wiley   +1 more source

Attenuation Characteristics of Tuned Mass Dampers and Particle Tuned Mass Dampers in SDOF and MDOF Structures: Experimental Investigation and Simulation Analysis

Advances in Civil Engineering
This research article investigates the attenuation characteristics of passive control devices, viz., particle tuned mass damper (PTMD) and tuned mass damper (TMD) are used for a single degree of freedom (SDOF) and multidegree of freedom (MDOF) structure.
Prashant Sunagar, Manish S. Dharek, Manjunatha M, Ranjitha Tangadagi B, Sifatullah Bahij   +4 more
doaj   +1 more source