Results 21 to 30 of about 451 (121)

High‐Performance Noble‐Metal‐Free Perovskite Solar Cells Enabled by MoOX/Cr/Al Multilayer Electrodes

Advanced Energy Materials, EarlyView.
Cost‐effective perovskite solar cells (PSCs) are developed using a noble‐metal‐free MoOX/Cr/Al multilayer electrode. The devices achieve a power conversion efficiency (PCE) of 25.6%, competitive with that of Au‐based devices (26.3%), and a 25.5 cm2 mini‐module shows 21.3% PCE.
Wooyeon Kim, Soyeon Kim, In Choi, Seoyeong Lee, Subin Yu, Young Yun Kim, Bonkee Koo, Min Jae Ko   +7 more
wiley   +1 more source

Hertz-level Measurement of the 40Ca+ 4s 2S1/2-3d 2D5/2 Clock Transition Frequency With Respect to the SI Second through GPS

, 2011
We report a frequency measurement of the clock transition of a single ^40Ca^+ ion trapped and laser cooled in a miniature ring Paul trap with 10^-15 level uncertainty.
Cao, J., Gao, K., Guan, H., Huang, X., Huang, Y., Li, T., Liang, K., Liu, P., Ou, B.   +8 more
core   +1 more source

Electric field noise above surfaces: a model for heating rate scaling law in ion traps [PDF]

, 2008
We present a model for the scaling laws of the electric field noise spectral density as a function of the distance, $d$, above a conducting surface. Our analytical approach models the patch potentials by introducing a correlation length, $\zeta$, of the ...
Coudreau, Thomas, Dubessy, Romain, Guidoni, Luca   +2 more
core   +4 more sources

From Awareness to Action: Consumer Behaviour, Attitudes and Business Strategy in Sustainable and Circular Electronic Devices

Business Strategy and the Environment, EarlyView.
ABSTRACT Technological change and the increasing use of electronic devices have made electronic waste one of the fastest‐growing waste streams worldwide, posing significant environmental and social challenges. Thus, understanding consumer behaviour regarding the purchase, use and disposal of electronic products is key to developing effective circular ...
Idiano D'Adamo, Steven De Meester, Simone Di Leo, Massimo Gastaldi, Domiziana Lunadei   +4 more
wiley   +1 more source

Controlling fast transport of cold trapped ions

, 2012
We realize fast transport of ions in a segmented micro-structured Paul trap. The ion is shuttled over a distance of more than 10^4 times its groundstate wavefunction size during only 5 motional cycles of the trap (280 micro meter in 3.6 micro seconds ...
A. Steane, A. Walther, D. Hucul, F. Schmidt-Kaler, F. Ziesel, K. Ott, K. Singer, M. Hettrich, M. Rowe, R. Bowler, S. T. Dawkins, T. Ruster, U. Poschinger   +12 more
core   +1 more source

WSPLK: A systematic approach to the thermodynamic characterization of light and heavy Mexican crude oil

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract A streamlined characterization framework (WSPLK) is presented for modelling complex reservoir fluids using cubic equations of state. The key methodological contribution is the introduction of a single global parameter ε directly into Pedersen's boiling‐point correlation, restoring pure‐component calibration and eliminating the need for ...
Angélica Merlo‐Robredo, Heber Barragán‐Mayet, Lourdes Mayet‐Cruz, José Fernando Barragán‐Aroche   +3 more
wiley   +1 more source

Spouted bed drying parameters and adjuvant effects on polyphenol retention and antioxidant activity in mango peel powders

The Canadian Journal of Chemical Engineering, EarlyView.
Spouted bed drying of mango peels with colloidal SiO2 and corn starch produces a free‐flowing powder with reduced agglomeration, increased drying yield, and preserved antioxidant and polyphenol content. Abstract The production of polyphenol‐rich powders is a promising strategy for valorizing agro‐industrial byproducts. This study evaluated drying yield,
Guilherme Henrique Alves Pinto, Fábio Bentes Freire, José Teixeira Freire, Wanderley Pereira Oliveira   +3 more
wiley   +1 more source

Hybrid Osprey‐Salp Swarm Optimization Algorithm for Single and Multiobjective Optimal Power Flow in Smart Grids With Renewable Energy Integration

Energy Science &Engineering, EarlyView.
The proposed hybrid osprey‐salp swarm optimization algorithm addresses optimal power flow (OPF) problems in smart grids incorporating solar, hydro, and thermal generators. The algorithm is validated on Institute of Electrical and Electronics Engineers 30‐, 57‐, and 118‐bus test systems across five single and multiobjective OPF scenarios.
Mujtaba Ali, Muhammad Yaqoob Javed, Aamer Bilal Asghar, Gang Xiong, Krzysztof Ejsmont, Xiaoli Liu   +5 more
wiley   +1 more source

Single ion heat engine with maximum efficiency at maximum power [PDF]

, 2012
We propose an experimental scheme to realize a nano heat engine with a single ion. An Otto cycle may be implemented by confining the ion in a linear Paul trap with tapered geometry and coupling it to engineered laser reservoirs. The quantum efficiency at
E. Lutz, F. Schmidt-Kaler, G. Cerefolini, G. Jacob, J. Gemmer, J. Roßnagel, K. Singer, L. D. Landau, O. Abah, S. Deffner, S. A. Jacobson, Y. A. Cengel   +11 more
core   +2 more sources

Forecasting Natural Gas Futures Price Volatility of the United States: National Versus State‐Level Climate Concern Indexes

Journal of Futures Markets, EarlyView.
ABSTRACT This paper uses GARCH‐MIDAS to predict US natural gas futures volatility using national and state‐level Climate Concern Indexes (CCIs). We find that both national and state‐level CCIs positively affect price volatility. Notably, models using state‐level data—specifically those utilizing least‐squares (LS) weighting combinations—surpass the ...
Afees A. Salisu, Ahamuefula E. Ogbonna, Rangan Gupta, Onur Polat   +3 more
wiley   +1 more source