Anomalous in-plane magneto-optical anisotropy of self-assembled quantum dots

We report on a complex nontrivial behavior of the optical anisotropy of quantum dots that is induced by a magnetic field in the plane of the sample. We find that the optical axis either rotates in the opposite direction to that of the magnetic field or remains fixed to a given crystalline direction. A theoretical analysis based on the exciton pseudospin Hamiltonian unambiguously demonstrates that these effects are induced by isotropic and anisotropic contributions to the heavy-hole Zeeman term, respectively. The latter is shown to be compensated by a built-in uniaxial anisotropy in a magnetic field B_c = 0.4 T, resulting in an optical response typical for symmetric quantum dots.Comment: 5 pages, 3 figure

Complexity of a Discrete-Time Predator-Prey Model Involving Prey Refuge Proportional to Predator

In this paper, a discrete-time predator-prey model involving prey refuge proportional to predator density is studied. It is assumed that the rate at which prey moves to the refuge is proportional to the predator density. The fixed points, their local stability, and the existence of Neimark-Sacker bifurcation are investigated. At last, the numerical simulations consisting of bifurcation diagrams, phase portraits, and time-series are given to support analytical findings. The occurrence of chaotic solutions are also presented by showing the Lyapunov exponent while some parameters are varied

A quasi-experimental intervention to assess the effectiveness of a physician-delivered tobacco cessation intervention in India: A detailed study protocol

INTRODUCTION: Tobacco cessation is the most important, cost-effective preventive maintenance that clinicians can offer study participants who use tobacco. There is lack of preparedness among primary care physicians in delivering cessation interventions. There are also limited studies which record the effectiveness of cessation interventions in the Indian context. This study is designed to evaluate the effectiveness of brief and intensive tobacco cessation interventions delivered by trained primary care providers in two states of India. METHODS AND ANALYSIS: A quasi-experimental study design has been adopted for the study with around 20 primary care practices, selected from four districts of two states in India (Odisha and Rajasthan). Brief (3A) and Intensive tobacco (5A) cessation intervention services will be provided to two groups of tobacco users, respectively. Both groups will be followed up for 6 months to determine the effectiveness of the cessation interventions. The cost-effectiveness of the services will also be documented at the end of the study. The entire study will be completed in 24 months, of which the final 6 months will be reserved for study participant follow-up and quit rate evaluation. When comparing the two groups, differences between proportions will be assessed by chi-square test and differences between means with t-test. The conventional significance level of 0.05 will be used in all analyses in order to reject the null hypothesis of no difference between groups. We will use difference-in-differences methods to assess the impact of the interventions on physicians' behavior to deliver tobacco cessation in their clinical practice. CONCLUSION: The study is in participant recruitment phase

Performance Outcomes of Test-Driven Development: An Experimental Investigation

Despite the growing popularity of test-driven development (TDD), there is no empirical confirmation of the benefits that this contemporary practice confers on its users. Prior research findings on its efficacy have largely been inconclusive. We conducted a laboratory experiment to assess the impact of TDD on software quality and task satisfaction. Additionally, we investigated the productivity aspect of TDD as compared to the traditional test-last method of software development. Results indicate that software quality and task satisfaction are significantly improved when TDD is used. Despite the additional requirements of testing, TDD is not more resource intensive than the test-last method. We also examined TDD’s impact on learning post hoc and discuss the implications of our findings and directions for future research

POST COVID PNEUMONIA: MODERN THERAPEUTIC APPROACH BY PULMONARY DRUG DELIVERY DEVICE

Streptococcus pneumonia (also known as pneumococcal) is a commensal that colonizes the upper respiratory tract and a pathogen that causes intrusive illnesses like otitis media, pneumonia, sepsis, and meningitis. In India, the Invasive Bacterial Infection Surveillance (IBIS) organization and South Asian Pneumococcal Alliance (SAPNA) have been associated with assortment of significant information in regards to serotype dissemination and antimicrobial obstruction of pneumococcal diseases for over 12 years. COVID 19 Patients are much more prone towards this infection, if untreated at appropriate time. So development of New Device are immense Important which contributes rapid and Proper Drug Delivery to lungs. Research must be carried out in the field of Novel Drug Delivery System for target delivery of Drugs like Antibiotic, Bronchodiator and Corticosteroid to Respiratory Tract. The present Review article focus Different grade of Pneumococcal Infection and Infection associated with Post COVID Condition. The article also highlights new devices which helpful for Pulmonary drug delivery which is vital during COVID Associated Pneumococcal Infection

Characterisation and Liberation of Graphite Schist

This paper deals with the characterisation and liberation studies of graphite schist from Shivaganga, Tamilnadu. The graphite flakes are interbanded with quartz and calcite. Secondary calcite veins often traverses graphite flakes and quartz grains. Based on grain counting, frequency curves , comminution followed by flotation tests , the liberation size of graphite is estimated between 150to 90 microns. Therougher concentrate achieved at d&, passing of 145 micron size product contain 35 % FC with 99% recovery.The SFM study reveals the presence of minute inclusions of calcite and quartz within graphite flakes