CONTEXT Having a boyfriend or girlfriend, especially an older one, is associated with increased sexual risk in early adolescence. The mechanisms underlying this association are unclear. METHODS Middle school students in Northern California were surveyed annually from 1997 to 2000. For a sample of 1,214 males and 1,308 females who were sexually inexperienced in seventh grade, logistic and line...

In a previous issue of The Journal, I anticipated the decision of the Ninth Circuit in United States v. Loughner. The Ninth Circuit's opinion upheld the involuntary medication of Mr. Loughner under a Harper order, with awareness that he could thereby gain trial competence, and it allowed Mr. Loughner's extended commitment to Federal Medical Center (FMC)-Springfield for the purpose of rendering ...

In this paper we report about the 2016 competitive evaluation of quantified Boolean formulas (QBFs) solvers (QBFEVAL’16), the last in a series of events established with the aim of assessing the advancements in reasoning about QBFs. Aim of this preliminary report is to show at a glance design and results of QBFEVAL’16.

So far as the program has gone, therefore, all the evidence points to a great distance for these objects. As the spirals are undoubtedly in revolution-any other explanation of the spiral form seems impossible-r the failure to find any evidences of rotation would indicate that they must be of enormous actual size, and at enormous distances from us. At a distance of one-thousand light-years, supp...

The prediction of students’ achievement in algebra in eighth and ninth grades has become a research interest for practical issues of placement. A group of simple, easily accessible variables was used to predict student performance in algebra after completion of eighth grade. The three variables of school type, grade level, and previous year mathematics performance explained 54% of the variance ...

Arotisenet, Pierre: “Heavy Quarkonium Production in Hadron Collisions” In this talk, I will discuss heavy quarkonium production in the framework of Non-Relativistic Quantum ChromoDynamics. I will briefly describe the main features of this theory, highlighting both the successes and the current open questions in quarkonium production in collider experiments. I will next move on to an updated ana...

The only subtle thing to be careful of is that this involves an infinite sum, which does not a priori make sense. On the other hand, note that to compute the coefficient of x, (after substituting for y) we only need the first n+1 terms. Thus each coefficient can be computed using only finitely many terms and so the sum does make sense. With this said, it is then clear that (1 + y + y + . . . )(...