Interaction-driven transition between the Wigner crystal and the fractional Chern insulator in topological flat bands

We investigate an interaction-driven transition between crystalline and liquid states of strongly correlated spinless fermions within topological flat bands at low density (with filling factors nu = 1/5, 1/7, 1/9). Using exact diagonalization for finite-size systems with periodic boundary conditions, we distinguish different phases, whose stability depends on the interaction range, controlled by the screening parameter of the Coulomb interaction. The crystalline phases are identified by a crystallization strength, calculated from the Fourier transforms of pair correlation density, while the fractional Chern insulator (FCI) phases are characterized using momentum counting rules, entanglement spectrum, and overlaps with corresponding fractional quantum Hall states. The type of the phase depends on a particular single-particle model and its topological properties. We show that for nu = 1/7 and 1/5 it is possible to tune between theWigner crystal and fractional Chern insulator phase in the kagome lattice model with the band carrying the Chern number C = 1. In contrast, in the C = 2 models, the Wigner crystallization was absent at nu = 1/5, and appeared at nu = 1/9, suggesting that C = 2 FCIs are more stable agains

Promoting Interprofessional Collaboration Among Pediatric Physical Therapy Students Through Remote Simulation

Interprofessional collaboration must be taught in healthcare curriculum to ready graduates for the clinic, however, limited evidence is available to guide pediatric physical therapy faculty in best practices. This quantitative retrospective pretest-posttest study examined collaborative competency attainment, satisfaction, and self-confidence of 84 Doctor of Physical Therapy students from four campuses of a private university. Students participated in a live, remote simulated learning experience and completed the Student Satisfaction and Self-Confidence in Learning scale and the Interprofessional Collaborative Competencies Attainment Survey–Revised. There was significant improvement in student collaborative competencies after the simulated learning experience and students were satisfied and confident in the learning experience regardless of demographics. Findings support implementation of a remote simulation for the purpose of interprofessional collaboration in pediatric physical therapy education and may relate to other fields. Future research may explore the influence of interdisciplinary, remote simulation interventions on student behavior in the clinic and patient outcomes

EPR Paradox,Locality and Completeness of Quantum Theory

The quantum theory (QT) and new stochastic approaches have no deterministic prediction for a single measurement or for a single time -series of events observed for a trapped ion, electron or any other individual physical system. The predictions of QT being of probabilistic character apply to the statistical distribution of the results obtained in various experiments. The probability distribution is not an attribute of a dice but it is a characteristic of a whole random experiment : '' rolling a dice''. and statistical long range correlations between two random variables X and Y are not a proof of any causal relation between these variable. Moreover any probabilistic model used to describe a random experiment is consistent only with a specific protocol telling how the random experiment has to be performed.In this sense the quantum theory is a statistical and contextual theory of phenomena. In this paper we discuss these important topics in some detail. Besides we discuss in historical perspective various prerequisites used in the proofs of Bell and CHSH inequalities concluding that the violation of these inequalities in spin polarization correlation experiments is neither a proof of the completeness of QT nor of its nonlocality. The question whether QT is predictably complete is still open and it should be answered by a careful and unconventional analysis of the experimental data. It is sufficient to analyze more in detail the existing experimental data by using various non-parametric purity tests and other specific statistical tools invented to study the fine structure of the time-series. The correct understanding of statistical and contextual character of QT has far reaching consequences for the quantum information and quantum computing.Comment: 16 pages, 59 references,the contribution to the conference QTRF-4 held in Vaxjo, Sweden, 11-16 june 2007. To be published in the Proceeding

Academic Success and College Readiness: A Study of Predominantly Hispanic Students in South Texas High Schools

The purpose of this study was to determine if there was a significant difference between Early College High School students, ECHS students within a traditional high school, and traditional public high school students in south Texas as pertaining to college readiness. End of Course tests scores for English classes in grades nine and ten were tested. The population comprised of students from a 98% Hispanic and low socio-economic education region. In the state of Texas, EOC scores determine college readiness. Results revealed the ECHS stand-alone model had a significant difference in English EOC scores among the three models

Social presence in the 21st Century: an adjustment to the Community of Inquiry framework

The Community of Inquiry framework, originally proposed by Garrison, Anderson and Archer (2000) identifies teaching, social and cognitive presences as central to a successful online educational experience. This article presents the findings of a study conducted in Uruguay between 2007 and 2010. The research aimed to establish the role of cognitive, social and teaching presences in the professional development of 40 English language teachers on Continuous Professional Development (CPD) programmes delivered in blended learning settings. The findings suggest that teaching presence and cognitive presence have themselves 'become social'. The research points to social presence as a major lever for engagement, sense-making and peer support. Based on the patterns identified in the study, this article puts forward an adjustment to the Community of Inquiry framework, which shows social presence as more prominent within the teaching and cognitive constructs than the original version of the framework suggests

On the Consequences of Retaining the General Validity of Locality in Physical Theory

The empirical validity of the locality (LOC) principle of relativity is used to argue in favour of a local hidden variable theory (HVT) for individual quantum processes. It is shown that such a HVT may reproduce the statistical predictions of quantum mechanics (QM), provided the reproducibility of initial hidden variable states is limited. This means that in a HVT limits should be set to the validity of the notion of counterfactual definiteness (CFD). This is supported by the empirical evidence that past, present, and future are basically distinct. Our argumentation is contrasted with a recent one by Stapp resulting in the opposite conclusion, i.e. nonlocality or the existence of faster-than-light influences. We argue that Stapp's argumentation still depends in an implicit, but crucial, way on both the notions of hidden variables and of CFD. In addition, some implications of our results for the debate between Bohr and Einstein, Podolsky and Rosen are discussed.Comment: revtex, 11 page