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Energies, Vol. 8, Pages 154-171: A Novel Constant-Pressure Pumped Hydro Combined with Compressed Air Energy Storage System

26-Dec-2014 | Yao, Erren ; Wang, Huanran ; Liu, Long ; Xi, Guang, Energies, 2014

As intermittent renewable energy is receiving increasing attention, the combination of intermittent renewable energy with large-scale energy storage technology is considered as an important technological approach for the wider application of wind power and solar energy. Pumped hydro combined with ...

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Energies, Vol. 7, Pages 8483-8507: On-Site Radon Detection of Mining-induced Fractures from Overlying Strata to the Surface: A Case Study of the Baoshan Coal Mine in China

22-Dec-2014 | Zhang, Wei ; Zhang, Dong-Sheng ; Wu, Li-Xin ; Wang, Hong-Zhi, Energies, 2014

Large-scale longwall mining of shallow coal seams may cause mining-induced fractures that can project completely through to the surface. This could lead to a series of mine safety and environmental issues, further deteriorating the already fragile ecological environment in the Western mining ...

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Energies, Vol. 7, Pages 8535-8553: Analysis and Design Optimization of a Coaxial Surface-Mounted Permanent-Magnet Magnetic Gear

22-Dec-2014 | Zhang, Xiaoxu ; Liu, Xiao ; Wang, Chao ; Chen, Zhe, Energies, 2014

This paper presents the analysis and design optimization of a coaxial surface-mounted permanent-magnet magnetic gear. The magnetic field distribution in the coaxial magnetic gear is calculated analytically in the polar coordinate system and then validated by the finite element method (FEM). The ...

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Flagellated bacterial motility in polymer solutions [Physics]

16-Dec-2014 | Vincent A. Martinez; Jana Schwarz-Linek; Mathias Reufer; Laurence G. Wilson; Alexander N. Morozov; Wilson C. K. Poon, Proceedings of the National Academy of Sciences current issue, 2014

It is widely believed that the swimming speed, v, of many flagellated bacteria is a nonmonotonic function of the concentration, c, of high-molecular-weight linear polymers in aqueous solution, showing peaked v(c) curves. Pores in the polymer solution were suggested as the explanation. Quantifying ...

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Observation of ice-like water layers at an aqueous protein surface [Biophysics and Computational Biology]

16-Dec-2014 | Konrad Meister; Simona Strazdaite; Arthur L. DeVries; Stephan Lotze; Luuk L. C. Olijve; Ilja K. Voets; Huib J. Bakker, Proceedings of the National Academy of Sciences current issue, 2014

We study the properties of water at the surface of an antifreeze protein with femtosecond surface sum frequency generation spectroscopy. We find clear evidence for the presence of ice-like water layers at the ice-binding site of the protein in aqueous solution at temperatures above the freezing ...

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Microtubule nucleation remote from centrosomes may explain how asters span large cells [Applied Physical Sciences]

16-Dec-2014 | Keisuke Ishihara; Phuong A. Nguyen; Aaron C. Groen; Christine M. Field; Timothy J. Mitchison, Proceedings of the National Academy of Sciences current issue, 2014

A major challenge in cell biology is to understand how nanometer-sized molecules can organize micrometer-sized cells in space and time. One solution in many animal cells is a radial array of microtubules called an aster, which is nucleated by a central organizing center and spans the entire ...

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Energies, Vol. 7, Pages 8317-8337: Energy Consumption of a Battery Electric Vehicle with Infinitely Variable Transmission

12-Dec-2014 | Bottiglione, Francesco ; De Pinto, Stefano ; Mantriota, Giacomo ; Sorniotti, Aldo, Energies, 2014

Battery electric vehicles (BEVs) represent a possible sustainable solution for personal urban transportation. Presently, the most limiting characteristic of BEVs is their short range, mainly because of battery technology limitations. A proper design and control of the drivetrain, aimed at ...

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In This Issue [This Week in PNAS]

09-Dec-2014 | Proceedings of the National Academy of Sciences current issue, 2014

Chemical gardens in quasi-2D Chemical gardens in confined geometry. When clumps of some solid metal salts are dropped into an anionic solution such as water glass, the salts tend to precipitate into a dazzling array of crystals with tendrils and offshoots that resemble a lush garden. Chemical ...

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Solution Structure of the SGTA Dimerisation Domain and Investigation of Its Interactions with the Ubiquitin-Like Domains of BAG6 and UBL4A

21-Nov-2014 | John F. Darby et al., PLoS ONE, 2014

by John F. Darby, Ewelina M. Krysztofinska, Peter J. Simpson, Aline C. Simon, Pawel Leznicki, Newran Sriskandarajah, David S. Bishop, Lisa R. Hale, Caterina Alfano, Maria R. Conte, Santiago Martínez-Lumbreras, Arjun Thapaliya, Stephen High, Rivka L. Isaacson Background The BAG6 complex resides ...

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Energies, Vol. 7, Pages 7519-7534: A Recursive Solution for Power-Transmission Loss in DC-Powered Networks

18-Nov-2014 | Kim, Sehwan ; Chou, Pai H., Energies, 2014

This article presents a recursive solution to the power-transmission loss in DC-powered networks. In such a network, the load cannot be modeled as a fixed equivalent resistance value, since the switching regulator may draw more or less current based on the actual supply voltage to meet the power ...

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