Partial words are sequences over a finite alphabet that may have holes that match, or are compatible with, all letters in the alphabet; partial words without holes are simply words. Given a partial word w, we denote by subw(n) the set of subwords of w of length n, i.e., words over the alphabet that are compatible with factors of w of length n. We call a set S of words h-representable if S = sub...

background and aims. the aim of this study was to assess the opening torque of grooved and non-grooved screws made of shape memory alloys (sma) for fixation of mandibular fractures. materials and methods. in this in vitro study the opening torques of ten sma screws with grooves and ten sma screws without grooves were compared in 20 holes (10 holes for grooved screws and 10 holes for non-grooved...

Lake Trout (Salvelinus namaycush) spawn in fall and hatch in spring; to protect their eggs over the winter they spawn on rocky reefs, where the eggs settle deeply into interstices. Uptake of water swells the eggs, further protecting them by lodging in crevices. Freshwater sculpin (Cottidae), the primary predator of salmonid eggs, are small, benthic fishes with malleable bodies and large heads. ...

www.physicstoday.org After decades of effort, numerical relativists can now simulate the inspiral and merger of two black holes orbiting each other. That computational triumph has come none too soon—physicists are on the verge of detecting gravitational waves for the first time, and at long last they know what to look for. Black holes are strong-field objects whose properties are governed by Ei...

I consider a truncation of low-energy string theory which contains two U(1) gauge fields. After making some general comments on the theory, I describe a previously-obtained instanton for the pair creation of black holes when both gauge fields are non-zero, and obtain the pair creation rate by calculating its action. This calculation agrees qualitatively with the earlier calculation of the pair ...

We propose and demonstrate a purely electrical method for measuring the effective temperature T, of majority carriers under the injection of hot minority carriers. The T, of holes in a thin p-type InGaAs layer, heated by electron injection from an InAlAs layer in a three-terminal lattice-matched heterostructure, was determined by measuring the thermionic emission current of holes over another s...

We develop and test a theory of the origins and consequences of structural holes, using a theoretical framework that argues that network structures emerge from the interplay of two complementary forces: structural constraints and network opportunities. Our data comprises a co-membership network among 501 production teams in the Italian TV industry tracked over a period of 12 years. Using analys...

As was suggested about a year ago, one of the most dramatic consequences of low-scale (∼ 1 TeV) quantum gravity is copious production of mini black holes at future accelerators and in ultra-high-energy cosmic ray collisions. Hawking radiation of these black holes is constrained mainly to our (3+1)-dimensional world and results in rich phenomenology. With the original idea having been cited over...

An analysis of cosmic string breaking with the formation of black holes attached to the ends reveals a remarkable feature: the black holes can be correlated or uncorrelated. We find that, as a consequence, the number-of-states enhancement factor in the action governing the formation of uncorrelated black holes is twice the one for a correlated pair. We argue that when an uncorrelated pair forms...

In parts of North China Plain, there are several aquifers in the thick alluvium over coal seam, which overlays a large amount resources. Roof water inrush accident occurred during mining often caused by multiple reasons. Based on case roof Zhaogu Mining Area, hydrologic supplementary exploration north flank, stratum data were obtained; combined with previous geological drilling mine, structural...