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The set of linear, differential operators preserving the vector space of couples of polynomials of degrees n and n − 2 in one real variable leads to an abstract associative graded algebra A(2). The irreducible, finite dimensional representations of this algebra are classified into five infinite discrete sets and one exceptional case. Their matrix elements are given explicitely. The results are ...

We examine effects of state-level job losses on student achievement. Job losses to 1% of states’ working-age populations decrease states’ eighth-grade math scores by .076 standard deviations. This result is an order of magnitude larger than effects in studies comparing students whose parents lose employment to otherwise similar students, suggesting that downturns affect all students, not just s...

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Abstract Introduction Past research on Persistent Genital Arousal Disorder (PGAD) has shown that a history of sexual abuse is common among women with PGAD (Leiblum et al., 2007; Pink 2014), higher rates those who are most symptomatic 2007). However, there need for replication and developing theoretical understanding the mechanisms developmental course this association. Moreover, although little...

Abstract Study question Does sperm selection by thermotaxis increase competent spermatozoa count? Summary answer When compared to capacitation alone, our findings suggest an improvement in the availability of high quality after terms motility and morphology. What is known already Thermotaxis a natural mechanism that guides through female genital tract. It has been previously shown that, mice mo...