The Optical Polaron versus the Effective Dimensionality in Quantum Well Systems ‫الكمية‬ ‫الحفر‬ ‫انظمة‬ ‫في‬ ‫الفعالة‬ ‫األبعاد‬ ‫مع‬ ‫الضوئي‬ ‫البوالرون‬

Abstract The confined optical polaron is investigated within the framework of an improved variational technique yielding a unified characterization of problem for all the coupling strengths. The ground state energy is studied as a function of the effective dimensionality of the quantum well to interpolate between all possible confinement geometries. ‫ملخص‬ ‫لنظرية‬ ‫معدلة‬ ‫طريقة‬ ‫باستخدام‬ ‫المحصور‬ ‫الضوئي‬ ‫البالرون‬ ‫مسألة‬ ‫دراسة‬ ‫تم

It Could Be Worse But It Should Be Better: COVID-19 and The Lebanese Radiology Departments Preparedness.

An unprecedented sanitary challenge is threatening human beings due to COVID-19 pandemic. There is no light at the end of the tunnel concerning treatment and worries from a possible second wave start to arise even before the end of the first one. We conducted a multicenter study to reassess the different aspects of radiology departments’ preparedness in Lebanon stating the points of strength and more importantly depicting the points of weakness. Lessons were then extracted to be more prepared for possible future similar circumstances