A unifying framework for game tree algorithms is GSEARCH, designed by Ibaraki Ibaraki 86]. In general, a relatively great deal of memory is necessary for instances of this framework. In Ibaraki 91A] an extended framework, called RSEARCH, is discussed, in which the use of memory can be controlled. In this paper variants of above frameworks are introduced, to be called Gsearch and Rsearch respect...

This paper summarizes recent analytical Invest igations of the mathematical properties of heuris­ t ics and the i r Influence on the performance of common search techniques. The results are reported without proofs, together with discussions of moti­ vations and Interpretations. Highlights include the fol lowing: relations between the precision of the heurist ic estimates and the average complex...

Well-known algorithms for the evaluation of the minimax function in game trees are alpha-beta Knuth] and SSS* Stockman]. An improved version of SSS* is SSS-2 Pijls-1]. All these algorithms don't use any heuristic information on the game tree. In this paper the use of heuristic information is introduced into the alpha-beta and the SSS-2 algorithm. Extended versions of these algorithms are presen...

PURPOSE The identification of sick sinus syndrome (SSS) in patients with atrial flutter (AFL) is difficult before the termination of AFL. This study investigated the patient characteristics used in predicting a high risk of SSS after AFL ablation. MATERIALS AND METHODS Out of 339 consecutive patients who had undergone radiofrequency ablation for AFL from 1991 to 2012, 27 (8%) had SSS (SSS gro...

BACKGROUND AND PURPOSE Hypoplasia of the rostral third of the SSS is a well-known variant and constitutes the most frequent variation of the SSS after preferential drainage to one of the transverse sinuses. Our aim was to describe unilateral hypoplasia of the rostral end of the SSS. MATERIALS AND METHODS CTA performed in 100 consecutive patients studied for conditions other than dural sinus t...

BACKGROUND Although sleep is conserved throughout evolution, the molecular basis of its control is still largely a mystery. We previously showed that the quiver/sleepless (qvr/sss) gene encodes a membrane-tethered protein that is required for normal sleep in Drosophila. SLEEPLESS (SSS) protein functions, at least in part, by upregulating the levels and open probability of Shaker (Sh) potassium ...

f T f a m t o q t . INTRODUCTION n the past decade, spatial solitons (SSs) supported by hotorefractive effect have attracted much attention. he photorefractive effect is a saturable nonlinearity that an support oneor two-dimensional optical SSs at a very ow (microwatts) power level. Interesting discoveries, uch as self-trapping of incoherent white light, interacion of the SSs, self-trapping of ...

In 1979 Stockman introduced the SSS* minimax search algorithm that dominates Alpha-Beta in the number of leaf nodes expanded. Further investigation of the algorithm showed that it had three serious drawbacks, which prevented its use by practitioners: it is difficult to understand, it has large memory requirements, and it is slow. This paper presents an alternate formulation of SSS*, in which it...

The quiver/sleepless (qvr/sss) gene encodes a small, glycosylphosphatidylinositol-anchored protein that plays a critical role in the regulation of sleep in Drosophila. Loss-of-function mutations in qvr/sss severely suppress sleep and effect multiple changes in in situ Shaker K(+) currents, including decreased magnitude, slower time-to-peak, and cumulative inactivation. Recently, we demonstrated...

OBJECTIVE Lower subjective socioeconomic status (SSS) consistently shows associations with poorer health with the strongest relationships emerging with global self-rated health. Though often interpreted as reflecting the impact of low SSS on health, the association could also arise from confounding SSS with negative affect. In this research we sought to determine if negative affect confounds, o...