Influence of phonons on exciton-photon interaction and photon statistics of a quantum dot

In this paper, we investigate, phonon effects on the optical properties of a spherical quantum dot. For this purpose, we consider the interaction of a spherical quantum dot with classical and quantum fields while the exciton of quantum dot interacts with a solid state reservoir. We show that phonons strongly affect the Rabi oscillations and optical coherence on first picoseconds of dynamics. We consider the quantum statistics of emitted photons by quantum dot and we show that these photons are anti-bunched and obey the sub-Poissonian statistics. In addition, we examine the effects of detuning and interaction of quantum dot with the cavity mode on optical coherence of energy levels. The effects of detuning and interaction of quantum dot with cavity mode on optical coherence of energy levels are compared to the effects of its interaction with classical pulse

Determinants of outpatient health service utilization according to andersen�s behavioral model: A systematic scoping review

Background: The present review focuses on identifying factors contributing to health service utilization (HSU) among the general adult population according to Anderson�s behavioral model. Methods: Published articles in English on factors related to HSU were identified by systematically probing the Web of Science, MEDLINE (via PubMed research engine), and Scopus databases between January 2008 and July 2018, in accordance with the PRISMA guidelines. The search terms related to HSU were combined with terms for determinants by Boolean operators AND and OR. The database search yielded 2530 papers. Furthermore, we could find 13 additional studies following a manual search we carried out on the relevant reference lists. Results: Thirty-seven eligible studies were included in this review, and the determinants of HSU were categorized as predisposing, enabling, and need factors according to Andersen�s model of HSU. The results demonstrated that all predisposing, enabling, and need factors influence HSU. In most studies, the female gender, being married, older age, and being unemployed were positively correlated with increased HSU. However, evidence was found regarding the associations between education levels, regions of residence, and HSU. Several studies reported that a higher education level was related to HSU. Higher incomes and being insured, also, significantly increased the likelihood of HSU. Conclusion: This review has identified the importance of predisposing, enabling, and need factors, which influence outpatient HSU. The prediction of prospective demands is a major component of planning in health services since, through this measure, we make sure that the existing resources are provided in the most efficient and effective way. © 2020, Shriaz University of Medical Sciences. All rights reserved

Shaping and Being Shaped by Environments for Learning Science

Environments of learning often remain unnoticed and unacknowledged. This study follows a student and myself as we became aware of our local environment at MIT and welcomed that environment as a vibrant contributor to our learning. We met this environment in part through its educational heritage in two centennial anniversaries: John Dewey’s 1916 work Democracy and Education, and MIT’s 1916 move from Boston to the Cambridge campus designed by architect William Welles Bosworth. Dewey argued that for learning to arise through constructive, active engagement among students, the environment must be structured to accommodate investigation. In designing an environment conducive to practical and inventive studies, Bosworth created organic classical forms harboring the illusion of symmetry, while actually departing from it. Students and I are made open to the effects of this environment through the research pedagogy of “critical exploration in the classroom”, which informs my practice of listening and responding, and teaching while researching; it lay fertile grounds for involvement of one student and myself with our environment. Through viewing the moon and sky by eye, telescope, airplane and astrolabe, the student developed as an observer. She became connected with the larger universe, and critical of formalisms that encage mind and space. Applying Euclid’s geometry to the architecture outdoors, the student noticed and questioned classical features in Bosworth’s buildings. By encountering these buildings while accompanied by their current restorer, we came to see means by which their structure and design promote human interaction and environmental sustainability as intrinsic to education. The student responded creatively to Bosworth’s buildings through photography, learning view-camera and darkroom techniques. In Dewey’s view, democracy entails rejecting dualisms endemic in academic culture since the Greek classical era. Dewey regarded experimental science, where learners are investigators, as a means of engaging the world without invoking dualism. Although Dewey’s theory is seldom practiced, our investigations cohered with Deweyan practice. We experienced the environment with its centennial philosophy and architecture as educational agency supportive of investigation that continues to evolve across personal and collective history