Results 91 to 100 of about 747,618 (290)

Biomechanical indicators for the selection of talents in Colombian schoolchildren from 11 to 15 years old/Indicadores biomecánicos para la selección de talentos en escolares colombianos de 11 a 15 años

Podium, 2022
The selection of talents is carried out on the basis of biological, psychological, sociological and technical indicators. The objective of the study was to establish the level of correlation between running speed and some jumps for the selection of ...
Samuel Villamarin Menza, José Alcibíades Acero Jauregui, Bergelino Zaldívar Pérez   +2 more
doaj  

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Power Deficit Analysis of Multiple Hydrokinetic Power Plants in an Open-Channel System

Circuit: Jurnal Ilmiah Pendidikan Teknik Elektro
The electricity generation capacity of hydrokinetic power plants can be enhanced by paralleling multiple plants simultaneously. This study focuses on the longitudinal configuration of multiple hydrokinetic turbines installed in a water channel. The energy production rate of downstream turbines is lower than that of upstream turbines when placed close ...
Muhammad Ikhsan, Zufrizal Zufrizal, Taufik Taufik   +2 more
openaire   +1 more source

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

Advanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He, Minxian Zhang, Jinqiang Zhang, Hongqi Sun, Shaobin Wang, Xiaoguang Duan   +5 more
wiley   +1 more source

Neural Network Based Autonomous Power Regulation Method for Soft Open Points [PDF]

Dianli jianshe
[Objective] The soft open point （SOP） is a key solution for addressing challenges such as distributed photovoltaic （PV） integration， as it can connect multiple low-voltage distribution networks and offer functions including flexible power regulation ...
LIU Ya, SUN Lingfei, QIU Deyi, MENG Xiangjian, XU Tao, XING Lantao
doaj   +1 more source

Scalable Polyelectrolyte Complex‐Based Sorbent With Hourly Sorption−Desorption Cycles for Multicyclic Atmospheric Water Harvesting in Arid Environments

Advanced Functional Materials, EarlyView.
A polyelectrolyte complex‐based sorbent is produced by scalable, environmentally benign aqueous phase inversion. Its porous, LiCl‐ and GO‐integrated architecture enables hourly adsorption−desorption cycles at low relative humidity (RH < 30%). A large‐scale prototype achieves multicyclic, solar‐driven atmospheric water harvesting of 1.37 L kg−1 day−1 ...
Seung‐Hwan Oh, Incheol Heo, Won Cheol Yoo, Soo‐Hyung Choi   +3 more
wiley   +1 more source

In‐Situ Solution Complexation for n‐Type Surface‐Energetics Reconstruction in 2.0 eV Ultra‐Wide‐Bandgap Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
A reactive in situ solution complexation strategy reconstructs the surface of 2.0 eV ultra‐wide‐bandgap perovskites via proton transfer. This chemical modulation eliminates metallic defects and induces a degenerate‐like n‐type surface, establishing an Ohmic tunneling contact.
Saemon Yoon, Han‐Gyun Lim, Jinyoung Kim, Gyu Min Kim, Seojun Lee, Jun Ryu, SungWon Cho, Jincheol Kim, Hyosung Choi, Jung Sang Cho, Jongsung Park, Dong‐Won Kang   +11 more
wiley   +1 more source

A Comparative Study on Optimal Engine-Start Performance of Parallel Hybrid Electric Vehicles With Various Starter Motors

IEEE Access
Pre-transmission parallel hybrid electric vehicles (HEVs) have various architectures, depending on the type and size of the engine-starter motor. Such architectural variations pose a design trade-off between cost and engine-start performance.
Jaeyoon Kim, Kijong Park, Dongwoo Kim, Dongsuk Kum   +3 more
doaj   +1 more source

Determining Absorption, Emissivity Reduction, and Local Suppression Coefficients inside Sunspots

, 2010
The power of solar acoustic waves is reduced inside sunspots mainly due to absorption, emissivity reduction, and local suppression. The coefficients of these power-reduction mechanisms can be determined by comparing time-distance cross-covariances ...
A.D. Crouch, A.G. Kosovichev, A.G. Kosovichev, B.W. Hindman, B.W. Lites, D.-Y. Chou, D.-Y. Chou, D.-Y. Chou, D.-Y. Chou, D.-Y. Chou, D.C. Braun, D.C. Braun, H.C. Spruit, J. Hollweg, Junwei Zhao, K.-R. Chen, K.V. Parchevsky, M. Goossens, M. Gordovskyy, N. Hurlburt, O. Burtseva, P.H. Scherrer, P.S. Cally, P.S. Cally, R. Leighton, R. Wachter, S.P. Rajaguru, Stathis Ilonidis, T. Bogdan, T. Sakurai, T.L. Duvall Jr., Y.-Q. Lou   +31 more
core   +1 more source

A Universal Interfacial Dipole Strategy for Defect Suppression in Inverted Perovskite Solar Cells With Tunable Bandgaps

Advanced Functional Materials, EarlyView.
A 2D heterointerface with a two‐site anchor bridge suppresses nonradiative recombination at the perovskite/C₆₀ interface by reducing surface defects, elevating the Fermi level, and strengthening the electric field. This strategy enables efficient electron extraction, delivering 26.32% efficiency, 1.217 V Voc, excellent operational stability, and broad ...
Chaohui Li, Hyoungwon Park, Fabian Streller, Klaus Götz, Jiwon Byun, Shudi Qiu, Zhangyu Yuan, Jonas Englhard, Andrej Vincze, Zijian Peng, Lirong Dong, Yanxue Wang, Chao Liu, Jingjing Tian, Mingjie Feng, Peichun Liao, Fu Yang, Andreas Späth, Andres Osvet, Thomas Heumueller, Marcus Halik, Silke H. Christiansen, Tobias Unruh, Julien Bachmann, Rainer H. Fink, Ning Li, Larry Lüer, Christoph J. Brabec   +27 more
wiley   +1 more source