A Simple Explanation for the X(3872) Mass Shift Observed for Decay to D^{*0} {D^0}bar

We propose a simple explanation for the increase of approximately 3 MeV/c^2 in the mass value of the X(3872) obtained from D^{*0} {D^0}bar decay relative to that obtained from decay to J/psi pi+ pi-. If the total width of the X(3872) is 2-3 MeV, the peak position in the D^{*0} {D^0}bar invariant mass distribution is sensitive to the final state orbital angular momentum because of the proximity of the X(3872) to D^{*0} {D^0}bar threshold. We show that for total width 3 MeV and one unit of orbital angular momentum, a mass shift ~3 MeV/c^2 is obtained; experimental mass resolution should slightly increase this value. A consequence is that spin-parity 2^- is favored for the X(3872).Comment: 3.5 pages, 4 eps figure

#quitbullyingme: Teachers’ and Speech-Language Pathologists’ Perceptions of the Academic, Social, and Emotional Impact of Cyberbullying on Individuals Who Stutter

The purpose of this study was to examine Teachers’ and Speech-Language Pathologists’ perceptions on the academic, social, and emotional impact that cyberbullying has on individuals who stutter. This study also looked at Teachers’ and Speech-Language Pathologists’ management skills of cyberbullying when cyberbullying arose with their students or clients. The researcher created a survey which included Likert-type questions and open response questions to address these topics. As concluded from the results of this study, Teachers and Speech-Language Pathologists both believe that students and clients who stutter are impacted the most emotionally, directly associating with cyberbullying. In addition to this, the results showed that Teachers and Speech-Language Pathologists were not as comfortable with managing bullying and cyberbullying when it has occurred. One major implication of this study is that Teachers and Speech-Language Pathologists should be provided training programs and bullying prevention models that specifically address cyberbullying. By including cyberbullying into these prevention models, it would increase the feelings of preparedness that these professionals feel when addressing any acts of bullying and/or cyberbullying

A cell autonomous role for the Notch ligand Delta-like 3 in αβ T- cell development

Notch signalling is critical to help direct T-cell lineage commitment in early T-cell progenitors and in the development of αβ T-cells. Epithelial and stromal cell populations in the thymus express the Notch DSL (Delta, Serrate and Lag2) ligands Delta-like 1 (Dll1), Delta-like 4 (Dll4), Jagged 1 and Jagged 2, and induce Notch signalling in thymocytes that express the Notch receptor. At present there is nothing known about the role of the Delta-like 3 (Dll3) ligand in the immune system. Here we describe a novel cell autonomous role for Dll3 in αβ T-cell development. We show that Dll3 cannot activate Notch when expressed in trans but like other Notch ligands it can inhibit Notch signalling when expressed in cis with the receptor. The loss of Dll3 leads to an increase in Hes5 expression in double positive thymocytes and their increased production of mature CD4+ and CD8+ T cells. Studies using competitive irradiation chimeras proved that Dll3 acts in a cell autonomous manner to regulate positive selection but not negative selection of autoreactive T cells. Our results indicate that Dll3 has a unique function during T-cell development that is distinct from the role played by the other DSL ligands of Notch and is in keeping with other recent studies indicating that Dll1 and Dll3 ligands have non-overlapping roles during embryonic development

Nativity Activity: Create Your Own 3D Nativity Scene

Nativity activity: Color, cut and create your own Nativity set. Materials: fine-tip markers or colored pencils; scissors; tape; paper clips (optional). The figures in the activity are based on the Nativity set from Denmark by Anne Beate. This set is part of the Van Mullekom Collection in the Marian Library Crèche Collection, University of Dayton

Chiral Suppression of Scalar Glueball Decay

Because glueballs are SU(3)_{Flavor} singlets, they are expected to couple equally to u,d, and s quarks, so that equal coupling strengths to \pi^+\pi^- and K^+K^- are predicted. However, we show that chiral symmetry implies the scalar glueball amplitude for G_0 \to \qbq is proportional to the quark mass, so that mixing with \sbs mesons is enhanced and decays to K^+K^- are favored over \pi^+\pi^-. Together with evidence from lattice calculations and from experiment, this supports the hypothesis that f_0(1710) is the ground state scalar glueball.Comment: 9 pages; This revision reconciles posting (approximately) with published version. Posting contains figures that are omitted in the publicatio

The dreams of the cashless society: A study of EFTPOS in New Zealand

This paper looks at the way in which Utopian dreams, such as the cashless society, influence the adoption of information technology. Some authors claim that Utopian visions are used by IT firms to market their services and products, and that the hype that often accompanies technological innovations is part of a large scale social process in contemporary societies. This article discusses the social role of technological utopianism with respect to the introduction of EFTPOS in New Zealand. The case of New Zealand is interesting, given that New Zealand has the highest saturation of EFTPOS terminals in the world

Career Guidance for Culturally and Linguistically Diverse Migrants and/or Refugees

Although growing numbers of Culturally and Linguistically Diverse Migrants and Refugees (CALDM/R) are entering higher education, the sector has limited knowledge of how they are supported to transition out of higher education and seek employment after they graduate. This is likely the result of CALDM/R students’ invisibility in the current formal Australian Government categories used to direct equity policy, funding and practice (which include students from low socioeconomic status (SES) backgrounds, Indigenous students and students who live in rural and remote Australia). For example, although some CALDM/R students may reside in low SES areas and/or regional/remote areas, the specific needs of this cohort are not recognised within these broad categories, while other CALDM/R students may not fall within any of the current equity categories at all. The focus on these current equity categories means that institutions are not mandated to respond to the nuanced needs of other specific groups, which is particularly problematic for CALDM/R because of their relatively poorer employment outcomes

The status of strange meson spectroscopy

The present status of strange meson spectroscopy is reviewed with emphasis on the results obtained with the LASS spectrometer at SLAC. The systematics of the level structure are discussed with respect to quark model expectations, and the impact of the proposed KAON Factory on the future of the subject considered. 12 refs., 14 figs