The disease caused by the SARS-Cov 2 virus has spread to most areas of the world with high rates of infection and deaths. Facing the complicated developments of the epidemic, clinical medical staff (CMS) are at risk of suffering psychological pressure. This study aimed to investigate the situation of anxiety, depression, and related factors affecting CMS during the COVID-19 pandemic at Dong Da General Hospital and Dong Anh General Hospital in Hanoi. A cross-sectional study was conducted from April to July 2020 using self—administered questionnaires amongst 341 CMS. The participants’ anxiety levels were assessed using the standardized General Anxiety Disorder-7 (GAD-7) toolkit and levels of depression expression were assessed based on the standardized Patient Health Questionnaire-9 (PHQ-9) toolkit. Of the CMS who completed the questionnaire, 33.1% had an anxiety disorder and 23.2% exhibited mild to very severe depression. The factors associated with anxiety and depression were department of work, shortage of human resources, and discrimination from the community that directly affects the family of the CMS. The study results highlight the need for a training session to equip CMS with the skills required to cope with psychological stress in all circumstances in general and during the pandemic in particular. This training is especially important for those working in at-risk departments which are susceptible to infection.
Though many different results associated
with the optical properties
of semiconductor nanotetrapods were reported, the relation between
the spectral characteristics and change in energy offsets across core/arm
interfaces of tetrapods has not been clarified yet. Particularly,
the origin of an emission peaked at the high-energy region is still
an issue of debate. To
get more insight into these topical problems, we have studied systematically
the optical properties of CdSe tetrapods synthesized with various
precursor concentrations. Absorption and emission transitions in CdSe
tetrapods were identified by means of their spectroscopic characteristics.
We have identified the high-energy emission peak originating from
spatially direct recombination of photogenerated carriers, which are
located in the core of tetrapods. The relative-intensity increase
of this emission is mainly related to an increase in the potential
barrier for electrons and to a decrease in the potential barrier for
holes. The differences in spectroscopic characteristics of CdSe tetrapods
have also been further discussed in relation to their shape evolution
in the one-pot synthesis.
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