Avoiding power broadening in optically detected magnetic resonance of single NV defects for enhanced DC-magnetic field sensitivity

We report a systematic study of the magnetic field sensitivity of a magnetic sensor based on a single Nitrogen-Vacancy (NV) defect in diamond, by using continuous optically detected electron spin resonance (ESR) spectroscopy. We first investigate the behavior of the ESR contrast and linewidth as a function of the microwave and optical pumping power. The experimental results are in good agreement with a simplified model of the NV defect spin dynamics, yielding to an optimized sensitivity around 2 \mu T/\sqrt{\rm Hz}. We then demonstrate an enhancement of the magnetic sensitivity by one order of magnitude by using a simple pulsed-ESR scheme. This technique is based on repetitive excitation of the NV defect with a resonant microwave \pi-pulse followed by an optimized read-out laser pulse, allowing to fully eliminate power broadening of the ESR linewidth. The achieved sensitivity is similar to the one obtained by using Ramsey-type sequences, which is the optimal magnetic field sensitivity for the detection of DC magnetic fields

A SYSTEMATIC APPROACH AND GENDER ASPECTS OF EPILEPSY

Epilepsy affects patients of opposite gender differently, hence requires gender-specific approaches in both management and treatment of such patients. Reproductive health, sexual function and other symptomatic disorders of various organ systems ought to be of cen-ter-focus for doctors treating patients with epilepsy, especially considering the fact that, all these conditions can adversely affect the quality of life of these patients. A considerate amount of scientific interest is being devoted to epilepsy in separate genders, however, insufficient attention is given to the comparative analysis peculiarities in these patients in terms of impact on health, level of depression and anxiety, leading psychological defense mechanisms, satisfaction and overall quality of life of patients with epilepsy. When activity of component parameters are viewed separately, they may not reveal pathogenesis as a whole, thus can’t be used to assess patients’ condition. Complex of electrographic and clinical characteristics are considered as a semiotic system. Such combined analysis of both physiological as well as clinical factors allow biologically-based systematic assessment of syndrome formation and relationship establishment between human biological peculiarities and clinical characteristics of the disease based on gender. Systematic approach in the analysis of physical, psychological and social aspects of epilepsy in men and women will focus attention to gender based disease peculiarities optimize treatment, outpatient follow-up and overall improvement of quality of life of patients.</jats:p

ПідготовкА майбутніХ учителіВ початковоЇ школИ дО формуваннЯ комунікативноЇ компетентностІ учніВ

У статті зроблено спробу здійснити практичне розв'язання наукової проблеми підготовки майбутніх учителів до формування комунікативної компетентності молодших школярів. Обґрунтовано сутність цього поняття як інтегрованої системи спеціальних знань, умінь та навичок спілкування та особистісних якостей, які визначають загальний та професійний рівень культури спілкування, що забезпечить можливість формування комунікативної компетентності молодшого школяр