Nationwide epidemiologic surveys are needed to further explore the prevalence of insomnia in China. The low percentage of subjects treated for insomnia indicates a major public health problem that should be addressed. Strict controls on use of benzodiazepines are warranted.

No abstract

HgSe CQD based narrowband photodetectors with plasmonic nano-disk arrays were developed for the detection of mid-wave infrared.

Colloidal quantum dots (CQDs) are promising materials for developing infrared (IR) detectors. Absorption spectra and spectral photoresponse can be continuously tuned by controlling the size, shape, and composition of CQDs. However, the incapability to achieve site-selective patterning of CQDs by conventional methods (i.e., drop casting, spin coating, and spray coating) greatly hinders the realization of CQD-based multipixel or multispectral detectors. In this paper, we demonstrate a simple and highly efficient poly­(methyl methacrylate)-assisted transfer technique for the scalable fabrication of CQD-based photodetectors with multiple pixels, which respond to different spectral ranges of IR, by using patterned HgTe CQD films. Large arrays of three-pixel photodetectors were produced on both flat and curved substrates with a high fabrication success rate of over 95%. The maximum room-temperature responsivity of up to 0.1 A/W under low operation voltage (<10 V) was achieved. Furthermore, a spectral photodetector was fabricated, and an IR spectrum ranging from 2 to 10 μm was successfully reconstructed. The proposed fabrication method acted as a reliable approach for manufacturing high-performance photodetector arrays for applications in multicolor focal plane cameras and microspectrometers.

Objective The objective of this meta-analysis is to estimate the pooled prevalence of suicidal ideation and suicide attempts in the general population of Mainland China. Methods A systematic literature search was conducted via the following databases: PubMed, PsycINFO, MEDLINE, China Journals Full-Text Databases, Chongqing VIP database for Chinese Technical Periodicals and Wan Fang Data. Statistical analysis used the Comprehensive Meta-Analysis program. Results Eight studies met the inclusion criteria for the analysis; five reported on the prevalence of suicidal ideation and seven on that of suicide attempts. The estimated lifetime prevalence figures of suicidal ideation and suicide attempts were 3.9% (95% Confidence interval [CI]: 2.5%–6.0%) and 0.8% (95% CI: 0.7%–0.9%), respectively. The estimated female-male ratio for lifetime prevalence of suicidal ideation and suicide attempts was 1.7 and 2.2, respectively. Only the difference of suicide attempts between the two genders was statistically significant. Conclusion This was the first meta-analysis of the prevalence of suicidal ideation and suicide attempts in the general population of Mainland China. The pooled lifetime prevalence of both suicidal ideation and suicide attempts are relatively low; however, caution is required when assessing these self-report data. Women had a modestly higher prevalence for suicide attempts than men. The frequency for suicidal ideation and suicide attempts in urban regions was similar to those in rural areas.