Quantum phase transition in spin glasses with multi-spin interactions

We examine the phase diagram of the $p$-interaction spin glass model in a transverse field. We consider a spherical version of the model and compare with results obtained in the Ising case. The analysis of the spherical model, with and without quantization, reveals a phase diagram very similar to that obtained in the Ising case. In particular, using the static approximation, reentrance is observed at low temperatures in both the quantum spherical and Ising models. This is an artifact of the approximation and disappears when the imaginary time dependence of the order parameter is taken into account. The resulting phase diagram is checked by accurate numerical investigation of the phase boundaries.Comment: 20 Pages including 10 figures, Revte

Shipwreck and salvage in the tropics: the case of HMS Thetis, 1830–1854

In 1830, the British frigate HMS Thetis was wrecked at Cabo Frio, on the Brazilian coast. A British naval force was subsequently despatched to undertake a major salvage operation which lasted for well over a year. The substantial textual and visual archive associated with the case of the Thetis raises wider questions about the entanglement of naval, scientific, artistic, financial and legal concerns in an age of British maritime expansion. If the loss of such a ship brought into question the capacity of the British to act at a distance, it also provided an opportunity to mend and strengthen the networks of power and knowledge. The sources of error exposed by the disaster were to be subject to investigation by numerous authorities, including hydrographers keen to refine their charts and sailing directions and Fellows of the Royal Society seeking to advance the claims of science, as well as the Admiralty itself, in the judicial setting of a court martial. We focus here especially on narratives of the wreck and the salvage of the Thetis, and the significance of their repeated tellings of the story after the event; and on the evidential and representational status of the visual images of the scene in sketches, maps, charts, diagrams, engravings and paintings

The Road Less Traveled: Why Black males Choose Alternative Routes that Lead to Education

This study uses critical race theory and qualitative interviews to understand the perspectives of 10 Black males that have entered the field of education through non-traditional routes. It seeks to highlight the rationale for not choosing education as a first option, what eventually led them into the field, and finally how educational leaders might better recruit. As the field continues to evolve with demographics still heavily favoring women, decision makers in school districts, universities, and alternative certification programs need to understand the best methods to recruit and retain Black males in education. The findings of this research will benefit these stakeholders and their constituents and inform practitioners, particularly after the Covid-19 pandemic and current teacher shortage

Educational Accountability and Equity: Superintendent Perspectives

Educational equity is understood as the recognition of a school system to ensure resources to safeguard that all students have equitable access, opportunity, and outcomes (Galloway & Ishimaru, 2015). Yet inequity persists in the American educational system. School accountability remains at the forefront of education policy to ensure equitable achievement between students from all backgrounds regardless of race, ethnicity, family income, linguistic background, and ability (Krejsler, 2018; Skrla, 2001). This article reflects a qualitative approach to understanding public school superintendent voices regarding experiences, feelings, and beliefs related to our ongoing era of accountability in a changing social environment. This study examines the results of interviews of 13 public school superintendents in a large metropolitan area and identifies emergent themes in superintendent thinking as it revolves around school accountability. These themes are couched in larger discussion of educational equity

Technikbasiertes Spiel von Tagespflegebesuchern mit und ohne Demenz: Effekte, Heuristiken und Korrelate

Das Spiel von alten Menschen ist bislang relativ unbeachtet geblieben. Wir untersuchen dieses Thema mithilfe eines Tablet-Memory-Spiels wissenschaftlich auf 2 Ebenen: anhand einer psychologischen Beobachtung, die durch eine Spielprotokollanalyse ergänzt wird, und anhand einer deduktiv-induktiven Interpretation der kulturellen Spieltheorie

Aviso prévio cumprido em casa: análise da sua legalidade

Trabalho de Conclusão de Curso apresentado ao Departamento Acadêmico de Direito da Fundação Universidade Federal de Rondônia, campus Professor Francisco Gonçalves Quiles, para obtenção do título de Bacharel em Direito. Orientador: Prof. Esp. Jônathas SivieroO trabalho em questão traz à baila os efeitos da concessão do aviso prévio cumprido em casa na relação de emprego, destacando se gera prejuízos para o empregado ou empregador. Quando este rescinde um contrato de trabalho por tempo indeterminado, sem justa causa, pode optar, no tocante ao aviso prévio, entre indenizar, dispensar ou exigir o seu cumprimento, contudo, quando optar pela indenização ou dispensa do aviso, as verbas rescisórias deverão ser pagas até o décimo dia, contado da data da notificação da demissão, caso contrário até o primeiro dia útil imediato ao término do contrato. Alguns empregadores têm exigido que o empregado cumpra o aviso em casa aguardando ordens; essa modalidade, além de conferir ao trabalhador todas as garantias inerentes ao aviso prévio trabalhado, tais como o pagamento do salário referente ao tempo do aviso no primeiro dia útil imediato ao término do contrato bem como a contagem de seu prazo para todos os efeitos trabalhistas, dá ainda tempo integral para procurar novo emprego. Ocorre que, por outro lado, o TST tem entendido que o cumprimento do aviso prévio em casa constitui clara tentativa de burlar a legislação, o empregador usa desse artifício para prorrogar ao máximo o pagamento das verbas rescisórias, causando prejuízo ao trabalhador, que teria que aguardar o fim do prazo do aviso para receber as verbas, frente ao exposto foi criado a OJ14. Para sua realização foi utilizado o método da dogmática jurídica e o procedimento técnico aplicado foi de pesquisa bibliográfica

Deconstructing the LGBT-Victimization Association: The Case of Sexual Assault and Alcohol-Related Problems

Research on lesbian, gay, bisexual and/or transgender (LGBT) students has been gaining traction in the fields of criminology, victimology, and education, but available data lag behind the demand for studies on this underserved population. While LGBT students are often perceived to face greater risk of victimization and subsequent health problems than their counterparts, little research has investigated the mechanisms behind problematic outcomes for LGBT students. This research uses data from a Southeastern University to examine sexual assault among LGBT students and their experiences with alcohol-related problems. The results show that LGBT youth are at an increased risk for sexual victimization but that LGBT status does not have a direct effect on alcohol-related problems

Spectral and Timing Properties of IGR J17091-3624 in the Rising Hard State During its 2016 Outburst

We present a spectral and timing study of the NuSTAR and Swift observations of the black hole candidate IGR J17091-3624 in the hard state during its outburst in 2016. Disk reflection is detected in each of the NuSTAR spectra taken in three epochs. Fitting with relativistic reflection models reveals that the accretion disk is truncated during all epochs with $R_{\rm in}>10~r_{\rm g}$, with the data favoring a low disk inclination of $\sim 30^{\circ}-40^{\circ}$. The steepening of the continuum spectra between epochs is accompanied by a decrease in the high energy cut-off: the electron temperature $kT_{\rm e}$ drops from $\sim 64$ keV to $\sim 26$ keV, changing systematically with the source flux. We detect type-C QPOs in the power spectra with frequency varying between 0.131 Hz and 0.327 Hz. In addition, a secondary peak is found in the power spectra centered at about 2.3 times the QPO frequency during all three epochs. The nature of this secondary frequency is uncertain, however a non-harmonic origin is favored. We investigate the evolution of the timing and spectral properties during the rising phase of the outburst and discuss their physical implications.Comment: 11 pages, 9 figures, accepted by Ap