Constraints on extra dimensions from precision molecular spectroscopy

Accurate investigations of quantum level energies in molecular systems are shown to provide a test ground to constrain the size of compactified extra dimensions. This is made possible by the recent progress in precision metrology with ultrastable lasers on energy levels in neutral molecular hydrogen (H$_2$, HD and D$_2$) and the molecular hydrogen ions (H$_2^+$, HD$^+$ and D$_2^+$). Comparisons between experiment and quantum electrodynamics calculations for these molecular systems can be interpreted in terms of probing large extra dimensions, under which conditions gravity will become much stronger. Molecules are a probe of space-time geometry at typical distances where chemical bonds are effective, i.e. at length scales of an \AA. Constraints on compactification radii for extra dimensions are derived within the Arkani-Hamed-Dimopoulos-Dvali framework, while constraints for curvature or brane separation are derived within the Randall-Sundrum framework. Based on the molecular spectroscopy of D$_2$ molecules and HD$^+$ ions, the compactification size for seven extra dimensions (in connection to M-theory defined in 11 dimensions) of equal size is shown to be limited to $R_7 < 0.6 \mu$m. While limits on compactification sizes of extra dimensions based on other branches of physics are compared, the prospect of further tightening constraints from the molecular method is discussed

The Adapted Ordering Method for Lie Algebras and Superalgebras and their Generalizations

In 1998 the Adapted Ordering Method was developed for the representation theory of the superconformal algebras in two dimensions. It allows: to determine maximal dimensions for a given type of space of singular vectors, to identify all singular vectors by only a few coefficients, to spot subsingular vectors and to set the basis for constructing embedding diagrams. In this article we present the Adapted Ordering Method for general Lie algebras and superalgebras, and their generalizations, provided they can be triangulated. We also review briefly the results obtained for the Virasoro algebra and for the N=2 and Ramond N=1 superconformal algebras.Comment: Many improvements in the redaction for pedagogical purposes. Latex, 11 page

Parenting desires, parenting intentions, and anticipation of stigma upon parenthood among lesbian, bisexual and heterosexual women in Portugal

We explored parenting desires, parenting intentions, and anticipation of stigma upon parenthood in a sample of 257 self-identified lesbian, bisexual, and heterosexual childfree women in Portugal. No differences between the groups were observed concerning parenting desires. However, lesbian and bisexual women reported lower intentions to have children than their heterosexual counterparts. Although lesbian women considered themselves to have a higher chance of being victims of social stigma as mothers, this was not associated with their parenting desires. Furthermore, younger lesbian women intended to have children to a greater extent than did older lesbian women; relational status did not relate to lesbian women’s parenting intentions, desires, or anticipation of stigma. Overall, this study contributes to knowledge about family formation processes among Portuguese women diverse in sexual identity

Family formations and LGBT+ parenting: pioneering waves of self-defining families and their implications for children

Reviews of lesbian, gay, bisexual and transgender (LGBT+) parenting research have identified three waves of research on same-sex parenting since the 1980s (e.g., Golombok, 2007; Johnson, 2012). A first wave of studies concerned lesbian women, and to a lesser extent gay men, who had become parents while in heterosexual relationships. A second wave examined mostly women (and more residually men) who became parents in the context of a non-heterosexual identity. In both these waves, family and child outcome comparisons with heterosexual families were conducted. Later, moving away from a comparative agenda (Clarke, Ellis, Peel, & Riggs, 2010; Gato, 2016), a third wave was composed of studies dwelling on the unique challenges faced by lesbian mothers associated to their sexual minority status, such as decisions about genetic versus nongenetic parenthood, how childcare tasks would be shared out between a same-gender couple parenting together, or how to manage and cope with sexual minority stigma. We propose a new fourth wave of contemporary research denoting studies in which family members are allowed to self-define enabling families to deconstruct or queer cisheteronormative family structures

Galois Modular Invariants of WZW Models

The set of modular invariants that can be obtained from Galois transformations is investigated systematically for WZW models. It is shown that a large subset of Galois modular invariants coincides with simple current invariants. For algebras of type B and D infinite series of previously unknown exceptional automorphism invariants are found.Comment: phyzzx macros, 38 pages. NIKHEF-H/94-3

Platelet-rich plasma in osteoarthritis treatment: review of current evidence

Review[Abstract] Platelet-rich plasma (PRP) is defined as a volume of plasma with a platelet concentration higher than the average in peripheral blood. Many basic, preclinical and even clinical case studies and trials report PRP’s ability to improve musculoskeletal conditions including osteoarthritis, but paradoxically, just as many conclude it has no effect. The purpose of this narrative review is to discuss the available relevant evidence that supports the clinical use of PRP in osteoarthritis, highlighting those variables we perceive as critical. Here, recent systematic reviews and meta-analyses were used to identify the latest randomized controlled trials (RCTs) testing a PRP product as an intra-articular treatment for knee osteoarthritis, compared with an intra-articular control (mostly hyaluronic acid). Conclusions in the identified RCTs are examined and compared. In total, five recent meta-analyses and systematic reviews were found meeting the above criteria. A total of 19 individual trials were identified in the five reviews but only 9 were level of evidence I RCTs, and many had moderate or high risks of bias. At present, results from these RCTs seem to favor PRP use over other intra-articular treatments to improve pain scales in the short and medium term (6–12 months), but the overall level of evidence is low. As a result, clinical effectiveness of PRP for knee osteoarthritis treatment is still under debate. This is, prominently, the result of a lack of standardization of PRP products, scarceness of high quality RCTs not showing high risks of bias, and poor patient stratification for inclusion in the RCTs.Insituto de Salud Carlos III PI12/00329Insituto de Salud Carlos III; PI16/0212

A matrix S for all simple current extensions

A formula is presented for the modular transformation matrix S for any simple current extension of the chiral algebra of a conformal field theory. This provides in particular an algorithm for resolving arbitrary simple current fixed points, in such a way that the matrix S we obtain is unitary and symmetric and furnishes a modular group representation. The formalism works in principle for any conformal field theory. A crucial ingredient is a set of matrices S^J_{ab}, where J is a simple current and a and b are fixed points of J. We expect that these input matrices realize the modular group for the torus one-point functions of the simple currents. In the case of WZW-models these matrices can be identified with the S-matrices of the orbit Lie algebras that we introduced in a previous paper. As a special case of our conjecture we obtain the modular matrix S for WZW-theories based on group manifolds that are not simply connected, as well as for most coset models.Comment: Phyzzx, 53 pages 1 uuencoded figure Arrow in figure corrected; Forgotten acknowledment to funding organization added; DESY preprint-number adde

Nutrição e adubação: conceitos e aplicações na formação de mudas de pimenta longa.

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