Providing High Reliability in a Minimum Redundancy Archival Storage System

Author(s):  
D. Bhagwat ◽  
K. Pollack ◽  
D.D.E. Long ◽  
T. Schwarz ◽  
E.L. Miller ◽  
...  
2003 ◽  
Vol 3 (4) ◽  
pp. 169-175 ◽  
Author(s):  
S. Barbagallo ◽  
F. Brissaud ◽  
G.L. Cirelli ◽  
S. Consoli ◽  
P. Xu

In arid and semiarid regions the reclamation and reuse of municipal wastewater can play a strategic role in alleviating water resources shortages. Public awareness is growing about the need to recycle and reuse water for increasing supply availability. Many wastewater reuse projects have been put in operation in European and Mediterranean countries adopting extensive treatment systems such as aquifer recharge, lagooning, constructed wetlands, and storage reservoirs, mainly for landscape and agricultural irrigation. In agricultural reuse systems, there is an increasing interest in extensive technologies because of their high reliability, and easy and low cost operation and maintenance. Wastewater storage reservoirs have become the option selected in many countries because of the advantages they present in comparison with other treatment alternatives, namely the coupling of two purposes, stabilization and seasonal regulation. This paper describes an example of a wastewater storage system, built in Caltagirone (Sicily, Italy). The storage results in a tertiary treatment of a continuous inlet flow of activated sludge effluents. The prediction of the microbiological water quality has been evaluated by means of a non-steady-state first-order kinetic model. Single and multiple regressions were applied to determine the main variables that most significantly affected die-off coefficients. The proposed model has been calibrated using the results of a field monitoring carried out during a period from March to October 2000.


2016 ◽  
Vol 51 (4) ◽  
pp. 637-649 ◽  
Author(s):  
James Bornholt ◽  
Randolph Lopez ◽  
Douglas M. Carmean ◽  
Luis Ceze ◽  
Georg Seelig ◽  
...  

IEEE Micro ◽  
2017 ◽  
pp. 1-1 ◽  
Author(s):  
James Bornholt ◽  
Randolph Lopez ◽  
Douglas Carmean ◽  
Luis Ceze ◽  
Georg Seelig ◽  
...  

IEEE Micro ◽  
2017 ◽  
Vol 37 (3) ◽  
pp. 98-104 ◽  
Author(s):  
James Bornholt ◽  
Randolph Lopez ◽  
Douglas M. Carmean ◽  
Luis Ceze ◽  
Georg Seelig ◽  
...  

Author(s):  
Dan-Yun Li ◽  
◽  
Qun-Tai Shen ◽  
Zhen-Tao Liu ◽  
Hui Wang ◽  
...  

A stand-alone doubly fed induction generator (DFIG)-based wind power generation system using a third-harmonic injection indirect matrix converter (THIIMC) is proposed. The THIIMC has the same performance of a back-to-back pulse width modulation converter, but does not require the bulky direct current (dc)-link capacitor. Because of both its compact construction and high reliability, it is very suitable for embedding into DFIG-based wind generators. It also overcomes the drawbacks of indirect matrix converters and improves the reactive power output capability. The THIIMC consists of a rectifier-side converter, an inverter-side converter (ISC), and an active third-harmonic current injection circuit. A direct stator voltage vector control scheme for the ISC provides the desired stator voltage to the loads. The control scheme is designed to compensate the reactive power of the loads based on the THIIMC working principle. Maximum power point tracking control is performed by a battery energy storage system, which is placed in the dc-link of the THIIMC to smooth out the power fluctuations caused by load or wind speed variations. Simulation results demonstrate the performance and feasibility of the proposed topology and control scheme.


2014 ◽  
Vol 926-930 ◽  
pp. 2462-2465 ◽  
Author(s):  
Hui Xiang Zhou ◽  
Qiao Yan Wen

In order to solve the problem of growing massive of data in sensor network, we propose a new scheme of data storage for sensor network based on HDFS which is a cloud-based storage platform, it effectively alleviate the pressure of mass data storage on sensor network, and improved the scalability of storage system and part of the enhanced the data storage security on sensor network. And this scheme is based on cloud storage platform, storage the data which collected by sensors to each data node using a distributed architecture solution, and keep multiple copies of data in order to maintain its high reliability of data. As reducing the pressure of data storage, but also protects the security of stored data as shown by security analysis.


2009 ◽  
Vol 5 (2) ◽  
pp. 1-35 ◽  
Author(s):  
Mark W. Storer ◽  
Kevin M. Greenan ◽  
Ethan L. Miller ◽  
Kaladhar Voruganti

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