Results 51 to 60 of about 22,231 (277)

Improving the accuracy of atom interferometers with ultracold sources

New Journal of Physics, 2018
We report on the implementation of ultracold atoms as a source in a state of the art atom gravimeter. We perform gravity measurements with 10 nm s ^−2 statistical uncertainties in a so-far largely unexplored temperature range for such a high accuracy ...
R Karcher, A Imanaliev, S Merlet, F Pereira Dos Santos   +3 more
doaj   +1 more source

Geothermal resources research in a granitic basement – the Braga area case study (NW Portugal)

European Geologist, 2022
Geothermal resources are increasingly being considered as a strategic alternative in energy production, especially with the latest geopolitical developments. The densely populated Braga region, in NW Portugal, is endowed with a geostructural setting that
Bruno Pereira, Margarida Antunes, Helena Sant’ovaia, Luís Gonçalves, Cláudia Cruz, João Azevedo, Jorge Oliveira   +6 more
doaj   +1 more source

Pore Size Effects of Mesoporous N‐Doped Carbon Nanospheres as Advanced Support Material on the Activity of Molybdenum Sulfide Catalysts for the Hydrogen Evolution Reaction

Advanced Functional Materials, EarlyView.
By tuning the pore size of mesoporous N‐doped carbon (MPNC) nanospheres as support material for molybdenum sulfide, the electrochemical activity of the composite material for the hydrogen evolution reaction can be optimized. An ideal MPNC pore size of 60 nm allows a high number of molybdenum sulfide active sites while maintaining efficient proton and ...
Niklas Ortlieb, Christian Völker, Lars Guggolz, Anna Fischer   +3 more
wiley   +1 more source

SOME FEATURES OF CURRENT TECHNOGENIC MOVEMENTS OF THE EARTH’S CRUST

Геодинамика и тектонофизика, 2021
We describe the history of studying the current crustal movements by various methods and discuss technogenic effects recorded at large water-reservoir zones and mineral deposits in Siberia.
V. Yu. Timofeev, D. G. Ardyukov, A. V. Timofeev, E. V. Boyko, M. G. Valitov, E. N. Kalish, Yu. F. Stus, D. A. Nosov, I. S. Sizikov   +8 more
doaj   +1 more source

Phases and relativity in atomic gravimetry

, 2012
The phase observable measured by an atomic gravimeter built up on stimulated Raman transitions is discussed in a fully relativistic context. It is written in terms of laser phases which are invariant under relativistic gauge transformations.
B Lamine, Bordé C J, Bouyer P, Bouyer P, Cheinet P, Cohen-Tannoudji C, Einstein A, Hohensee M A, Jaekel M-T, Klein A G, Landau L, Le Gouët J, M-T Jaekel, Møller C, Peters A, S Reynaud, Schwartz H M, Sinha S, Wolf P, Wolf P, Wolf P   +20 more
core   +1 more source

Positioning with stationary emitters in a two-dimensional space-time [PDF]

, 2006
The basic elements of the relativistic positioning systems in a two-dimensional space-time have been introduced in a previous work [Phys. Rev. D {\bf 73}, 084017 (2006)] where geodesic positioning systems, constituted by two geodesic emitters, have been ...
B. Coll, B. Coll, B. Coll, Bartolomé Coll, Joan Josep Ferrando, Juan Antonio Morales, W. Rindler   +6 more
core   +3 more sources

An Ultrafast Self‐Gelling Versatile Hydrogel for Rapid Infected Burn Wound Repair in Military Medicine

Advanced Functional Materials, EarlyView.
A self‐gelling PG@PAC (POD/Gel‐CDH@PA/CHX) powder is developed for infected burn care in austere settings. Upon contact with wound exudate, it instantly forms an adhesive hydrogel, providing simultaneous hemostasis, broad‐spectrum antibacterial activity, reactive oxygen species scavenging, and immunomodulation. In a murine model of S.
Liping Zhang, Zhangrui Wu, Xiansheng Zhao, Geng Wang, Quyang Yang, Minxia zhang, Xiaowei Wang, Xiujun Cheng, Changyue Wu, Dan Wu, Yutian Yang, Canbin Dong, Tao Zhang, Weiqiang Tan, Ningwen Zhu   +14 more
wiley   +1 more source

Laser‐Welded Cellulose‐Carbon Nanotube Nanocomposites as a 3D Scaffold of Si Anodes for High‐Performance Lithium‐Ion Batteries

Advanced Functional Materials, EarlyView.
A Si anode comprising entangled networks of cellulose and SWCNT (C‐CNT) nanocomposites as an anode electrode for a high‐performance LIB is realized by fully utilizing the generated microstructure of a novel conductive 3D scaffold via a low‐temperature and eco‐friendly process. Additionally, localized heating via photo‐thermal conversion can be utilized
Boeun Ryu, Younghoon Jung, Hojin Son, Min‐Young Kim, Jinsub Lim, Changhun Yun   +5 more
wiley   +1 more source

Annual and Interannual Oscillations of Greenland’s Ice Sheet Mass Variations from GRACE/GRACE-FO, Linked with Climatic Indices and Meteorological Parameters

Remote Sensing
The ongoing global warming threatens the Greenland Ice Sheet (GIS), which has exhibited an overall mass loss since 1990. This loss varies annually and interannually, reflecting the intricate interactions between the ice sheet and atmospheric and oceanic ...
Florent Cambier, José Darrozes, Muriel Llubes, Lucia Seoane, Guillaume Ramillien   +4 more
doaj   +1 more source

Experimental assessment of the speed of light perturbation in free-fall absolute gravimeters

, 2015
Precision absolute gravity measurements are growing in importance, especially in the context of the new definition of the kilogram. For the case of free-fall absolute gravimeters with a Michelson-type interferometer tracking the position of a free ...
Baumann, H., Blas, D., Eichenberger, A., Klingele, E. E., Pythoud, F., Sibiryakov, S.   +5 more
core   +1 more source