Centralization of Power Supply; President's Address

On the Power of Centralization in Distributed Processing

In this thesis, we propose and analyze a multi-server model that captures a performance trade-off between centralized and distributed processing. In our model, a fraction p of an available resource is deployed in a centralized manner (e.g., to serve a most-loaded station) while the remaining fraction 1− p is allocated to local servers that can only serve requests addressed specifically to their...

Relationship between perception of power bases sport federations' presidents and employees' effectiveness

The purpose of this study was to investigate the relationship between power bases of sport federations' president (PBSP-other) with employees effectiveness. Population of this study was employees included of experts, federation committee chiefs and vise chiefs federation committee, n=288 that completed (POSP-other) questionnaire and employees Effectiveness. PBSP–other questionnaire (with 15 que...

Power Quality Improvement in Traction Power Supply Networks

AC railway traction loads are usually huge single phase loads. As a result, a significant amount of Negative Sequence Current (NSC) is injected into utility grid. Moreover, harmonics and consumption ofreactive power are further power quality problems that the supply network is encountering. In this paper, acompensation strategy with the aid of Railway Power Conditioner (RPC) is proposed to over...

Presidents, Vice Presidents, and Death: Closing the Constitution's Succession Gap

Underwriting the presidents.

The United States has had 43 presidents. We examined whether they survive significantly longer or shorter than their contemporaries. We found that survival was better for presidents elected in the 1789-1841 and 1933-2001 periods (SMRs of 0.7 and 0.6, respectively), but worse for those elected in 1845-1929 (SMR = 2.9). We also found increased mortality during the years lived in office (SMR = 1.4...