Bitcoin: A Peer-to-Peer Electronic Cash System

... care about later attempts to double-spend. The only way to confirm the absence of a transaction is to be aware of all transactions. In the mint based model, the mint was aware of all transactions ... Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com www.bitcoin.org Abstract. A purely peer-to-peer version of electronic cash would allow onl...

Ngày tải lên: 25/03/2014, 10:52

... separate data area is reserved for this purpose. The separate data area of these database systems means that they do not need the segment cleaning mechanisms of the Sprite LFS to reclaim log space. ... described here was supported in part by the Na- tional Science Foundation under grant CCR-8900029, and in part by the National Aeronautics and Space Administration and the Defense Advanced Rese...

Ngày tải lên: 12/09/2012, 15:05

Ngày tải lên: 02/03/2013, 16:57

... MATERIALS AND METHODS TCE (99+%) was obtained from Aldrich Chemical Co, and the TiO 2 used was Degussa P-25, which was mostly anatase and had a BET surface area of 50-m 2 /g and an average particle ... important potential in the treatment of water and wastewaters because the process is relatively rapid, capable of simultaneously degrading a wide range of contaminants, and potentia...

Ngày tải lên: 05/09/2013, 08:40

... wetland was as core technology, combined with the ecological and scenical design, was adopted to treat a typical village sewage. There is the long rain season in local place always accompanied ... constructed wetland systems for treating rural domestic wastewater in Lake Dianchi Valley., Proceedings of Asian waterqual’2003, IWA Asia-Pacific Regional conference, Abstract on pp. 70, Pape...

Ngày tải lên: 05/09/2013, 08:40

... colloids. Enhanced radionuclide transport at Chalk River Nuclear laboratories in Canada [12,13] Oak Ridge National laboratory in Tennessee [14,15] and Uranium deposit in Australia [16] were attributed ... International Energy & Environment Foundation. All rights reserved. Spatial moment analysis of colloid facilitated radionuclide transport in a coupled fracture-matrix system...

Ngày tải lên: 05/09/2013, 17:03

... TECHNOLOGY. Downloaded on November 25, 2008 at 23:56 from IEEE Xplore. Restrictions apply. Authorized licensed use limited to: TOKYO INSTITUTE OF TECHNOLOGY. Downloaded on November 25, 2008 at 23:56 from ... Xplore. Restrictions apply. Authorized licensed use limited to: TOKYO INSTITUTE OF TECHNOLOGY. Downloaded on November 25, 2008 at 23:56 from IEEE Xplore. Restrictions apply. Authorized li...

Ngày tải lên: 15/10/2013, 16:11

... security and connected to the moni- toring system. As long as the doors are closed, sense switches are also closed. The monitoring system can be installed at a convenient central place for easy operation. Fig. ... T10 via resistor R10 to turn it on. (Capacitor C10 serves as a filter capacitor.) As a re- sult, the collector voltage of transistor T10 falls to forward bias transistor T1...

Ngày tải lên: 05/11/2013, 21:15

... that can navigate a robot or a human towards an exit by avoiding the hazardous areas. Their approach, however, assumes a static hazard and there is no evaluation for a simulation scenario that ... consider a spreading hazard nor evaluate their approach in a simulation scenario that involves evacuees. Our approach focuses on the design and evaluation of a decision support system...

Ngày tải lên: 07/12/2013, 11:41

... social infrastructures using multicriteria value analysis and decision conferencing: A case study. International Transactions in Operational Research, 13(4), 279-297. Bana e Costa, C .A. , Lourenço, ... Paper LSEOR 09.108 1 1. Introduction Suppose that a manager has several projects, each one expected to add value to his organization. The manager has associated a forward cost...

Ngày tải lên: 07/12/2013, 11:41