In this paper, a novel algorithm for the load flow analysis problem in an islanded microgrid is proposed. The problem is modeled without any slack bus by considering the steady state frequency as one of the load flow variables. To model different control modes of DGs, such as droop, PV and PQ, in an islanded microgrid, a new formula for load flow equations is proposed. A hybrid optimization alg...

This paper presents Chemo-tactic PSO-DE (CPSO-DE) optimization algorithm combined with Lagrange Relaxation method (LR) for solving Unit Commitment (UC) problem. The proposed approach employs Chemo-tactic PSO-DE algorithm for optimal settings of Lagrange multipliers. It provides high-quality performance and reaches global solution and is a hybrid heuristic algorithm based on Bacterial Foraging O...

This paper studies the population of chess players and the distribution of their performances measured by Elo ratings and by computer analysis of moves. Evidence that ratings have remained stable since the inception of the Elo system in the 1970’s is given in several forms: by showing that the population of strong players fits a simple logistic-curve model without inflation, by plotting players...

Flap monitoring technology has progressed alongside flap design. The highly variable vascular anatomy and the complexity associated with modern perforator flaps demands dynamic, real-time, intraoperative information about the vessel location, perfusion patterns and flap physiology. Although most surgeons still assess flap perfusion and viability based solely on clinical experience, studies have...

A 52-year-old man presented with decreased vision in his right eye from 1 month ago. He had no history of systemic disorders or drug consumption. Best corrected visual acuity (BCVA) was 1/10 in his right eye and 10/10 in the left eye at presentation. Anterior segment examination and intraocular pressure were within normal limits. Based on fundus examination, optical coherence tomography (OCT) (...

Polypoidal choroidal vasculopathy (PCV) is a subtype of subretinal neovascularization and a variant of agerelated macular degeneration. Recent advances in diagnosis and treatment of this disease entity have improved the management of PCV and its outcomes. The diagnosis of PCV is often made based on funduscopic findings, but more definitively on indocyanine green angiography (ICGA) patterns. OCT...

In recent years enormous progress has been achieved in investigational procedures for uveitis. One field where these advances are most patent is imaging with the occurence of new methods such as indocyanine green angiography (ICGA), ultrasound biomicroscopy (UBM) and optical coherence tomography (OCT) to cite only the most important. This tremendous increase in precision and accuracy in the ass...

Two-player games of billiards, of the sort seen in recent Computer Olympiads held by the International Computer Games Association, are an emerging area with unique challenges for A.I. research. Drawing on the insight gained from our victory in the 2008 ICGA billiards tournament, we define a game-theoretic model of these types of billiards games. The modeling is surprisingly subtle. While sharin...

Most of the blood from the iris, ciliary body and choroid is drained by the vortex vein lying behind the equator in each quandrant of the eye. About half of the vortex veins show dilatations of varying sizes and shapes which are referred to as the vortex vein ampullae [1]. Occasionally, an unusually large dilatation of the vortex vein ampulla can be found by fundus examination and sometimes mis...