Provider: - Institution: - Data provided by Europeana Collections- Udgivet af Qinghai renmin Gengivelse af Gohua-maleri (国画) 76,2 x 25,6 cm. Nr. 3 ud af fire malerier (se Kob-kin-68-69 og 71)- All ...metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- Udgivet af Qinghai renmin Gengivelse af Guohua-maleri (国画) 76,2 x 25,6 cm. Nr. 1 ud af fire malerier (se Kob-kin-69-71)- All ...metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
Provider: - Institution: - Data provided by Europeana Collections- Udgivet af Qinghai renmin Gengivelse af Guohua-maleri (国画) 76,2 x 25,6 cm. Nr. 4 ud af fire malerier (se Kob-kin-68-70)- All ...metadata published by Europeana are available free of restriction under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
To explore the prevalence of depressive symptoms and the associated risk factors in frontline nurses under COVID-19 pandemic.
This cross-sectional study was conducted from February 20, 2020 to March ...20, 2020 and involved 562 frontline nurses. The effective response rate was 87.68%. After propensity score matched, there were 498 participants left. Extensive characteristics, including demographics, dietary habits, life-related factors, work-related factors, and psychological factors were collected based on a self-reported questionnaire. Specific scales measured the levels of sleep quality, physical activity, depressive symptoms, perceived organization support and psychological capital. Adjusted odds ratios and 95% confidence intervals were determined by binary paired logistic regression.
Of the nurses enrolled in the study, 50.90% had depressive symptoms. Three independent risk factors were identified: poor sleep quality (OR = 1.608, 95% CI: 1.384-1.896), lower optimism of psychological capital (OR = 0.879, 95% CI: 0.805-0.960) and no visiting friend constantly (OR = 0.513, 95% CI: 0.286-0.920).
This study revealed a considerable high prevalence of depressive symptoms in frontline nurses during the COVID-19 outbreak, and identified three risk factors, which were poor sleep quality, lower optimism of psychological capital, and no visiting friend constantly. Protecting mental health of nurses is important for COVID-19 pandemic control and their wellbeing. These findings enrich the existing theoretical model of depression and demonstrated a critical need for additional strategies that could address the mental health in frontline nurses for policymakers.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Mg/Al laminate composites were prepared at 400 ℃ for 15 min through single-pass rolling with reduction ratio from 10 to 27%. The bonding mechanism of the initial bonding stage under low pressure was ...studied. Two critical statuses (beginning bonding and complete bonding) are found at the reduction ratio of 14.5% and 21.75%. In this article, the coincidence of the ratio of external force (normal stress) and internal force (electronic force) at the two critical points shows that electrons overcome the potential barriers of Mg and Al respectively and make them move freely to form metal bonds. The free movement of electrons between two metal interfaces forms a metallic bond, which bonds the two metals. The formation of metallic bonds overcomes the classical barrier to achieve electron free motion. The ratio of
σ
Mg
to
σ
Al
(
σ
Mg
/
σ
Al
) is 0.7340, and the ratio of
f
Mg
to
f
Al
(
f
Mg
/
f
Al
) is 0.7988, where it can be found that the former agrees well with the latter. The good agreement between theory and experiment proves that overcoming the potential barrier plays an important role in the early bonding stage of bimetal composite plates.
The integrated urban drainage system has complicated sources of greenhouse gases (GHG) emissions, which is one of contribute to climate change. As a new model of low-carbon ecological city ...development in China, sponge city has great potential of carbon emission reduction. However, limited by the lack of awareness of the importance of carbon emissions from integrated urban drainage system, few studies have focused on the impact of sponge city construction on the carbon emissions from integrated urban drainage system. This study proposed an accounting framework for carbon emissions from integrated urban drainage system. The emission factor method was used to calculate carbon emissions. A case study was conducted in Xiamen, China, the carbon emission level of integrated urban drainage system and the carbon emission reduction effect of sponge city construction were discussed. The results show that the carbon emission from traditional city drainage system and sponge city drainage system accounts for about 3.4% and 1.7% of the city's carbon emission, respectively. Wastewater treatment and Sludge Treatment and Disposal are the main contributors to the carbon emissions from integrated urban drainage system. Electricity consumption is the main contributors to the indirect carbon emissions. Adjusting the sludge disposal method has the best carbon emission reduction effect, raising the standard of wastewater treatment plant tail water will lead to an increase in carbon emissions. Compared with the traditional city drainage system, the sponge city drainage system can reduce carbon emissions from integrated urban drainage system by an average of 49%, and the corresponding economic benefit was approximately 91–297 CNY/104 m3 wastewater. This study plays a positive role in understanding the carbon emission level of integrated urban drainage system and planning the low-carbon development of the city in the future.
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•A carbon emission accounting framework of integrated urban drainage system was proposed.•Sponge City can reduce carbon emissions from integrated urban drainage system by an average of 49%.•Wastewater treatment and Sludge Treatment and Disposal are the main sources of carbon emission in integrated urban drainage system.•The economic benefit of carbon emission reduction of sponge city drainage system is approximately 91–297 CNY/ten thousands m3 wastewater.
Climate change and anthropogenic activity are the primary drivers of water cycle changes. Hydrological droughts are caused by a shortage of surface and/or groundwater resources caused by climate ...change and/or anthropogenic activity. Existing hydrological models have primarily focused on simulating natural water cycle processes, while limited research has investigated the influence of anthropogenic activities on water cycle processes. This study proposes a novel framework that integrates a distributed hydrological model and an attribution analysis method to assess the impacts of climate change and anthropogenic activities on hydrological drought The distributed dualistic water cycle model was applied to the Fuhe River Basin (FRB), and it generated a Nash–Sutcliffe efficiency coefficient > 0.85 with a relative error of <5 %. Excluding the year with extreme drought conditions, our analysis revealed that climate change negatively impacted the average drought duration (−105.5 %) and intensity (−23.6 %) because of increasing precipitation. However, anthropogenic activities continued to contribute positively to the drought, accounting for 5.5 % and 123.6 % of the average drought duration and intensity, respectively, because of increased water consumption. When accounting for extreme drought years, our results suggested that climate change has contributed negatively to the average duration of drought (−113.2 %) but positively to its intensity (7.8 %). Further, we found that anthropogenic activities contributed positively to both the average drought duration and intensity (13.2 % and 92.2 %, respectively). While climate change can potentially mitigate hydrological drought in the FRB by boosting precipitation levels, its overall effect may exacerbate drought through the amplification of extreme climate events resulting from global climate change. Therefore, greater attention should be paid to the effects of extreme drought.
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•Novel method revealed impacts of climate change and human activity on droughts.•Climate change negatively impacted drought duration (increased precipitation).•Extreme climate events due to climate change may exacerbate drought.•Increased water consumption caused an increase in the anthropogenic influence.
A novel heterogeneous copper catalyst has been developed by supporting copper nanoparticles on activated charcoal via in situ reducing copper(II) with aqueous hydrazine as reductant. The ...characterization of Cu/C catalyst showed that the Cu0 nano-particles were formed on the surface of charcoal. This catalyst displayed good catalytic activities toward the N-arylation of primary amides and lactams with aryl iodides.
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•A novel charcoal based heterogeneous copper nanoparticle catalyst has been developed.•The Cu0 nano-particles were dispersed on the surface of charcoal uniformly.•This Cu/C catalyst displayed good catalytic reactivity in Goldberg reactions.•This Cu/C catalyst displayed good reuseability.
Background
Urethral diverticula (UD) affect 1–6% of adult women. Complex UD are rare, but can be challenging to manage. To evaluate the efficacy and safety of transurethral endoscopic extensive ...incision of complex UD in symptomatic women.
Materials and methods
We retrospectively evaluated 22 female patients with complex UD who underwent transurethral endoscopic extensive incision management in our hospital. This technique was completed by one experienced surgeon over a 7-year period between August 2012 and July 2019. The surgical technique involved placing the patient in a lithotomy position, inserting the needle electrode endoscopically, and incising the tented roof of the UD from its orifice until the entire roof had been opened widely. Outcome data included complete symptom resolution rate, imaging data, de novo stress urinary incontinence (SUI), recurrence, short-term and long-term complications. Cure was defined as decreased UD volume on postoperative magnetic resonance imaging and no post-voiding urinary retention in the diverticular cavity, with symptom resolution.
Results
The initial symptom-resolution rate after 37.0 (27.0, 50.0) months’ follow-up was 81.80% (18/22) and the de novo SUI rate was 13.60% (3/22). No patients required additional operations after conservative therapy. There was no symptomatic or imaging recurrence, and no short-term complications.
Conclusion
Transurethral endoscopic extensive incision was an effective and safe treatment for symptomatic female complex UD. Its symptom-resolution rate and de novo SUI rate might be superior to the conventional transvaginal approach. Moreover, it was less invasive and easier to conduct, with fewer complications.
The synthesis of well-defined light-element-derived quantum dots (LEQDs) with advanced optical properties under mild conditions is highly desirable yet challenging. Here, a polyaniline (PANI) ...structure is introduced into carbon-rich LEQDs to yield well-defined, fluorescent polyaniline quantum dots (PAQDs), PAQD24, through a one-pot room temperature reaction. The mild synthetic conditions effectively minimize the defects introduced during the conventional synthesis and endow PAQD24 with desirable optical properties, including a narrow emission band (full width at half maximum = 55 nm), an optimal quantum yield of 32.5% and two-photon fluorescence. Furthermore, the bandgap of PAQD24 is highly sensitive toward pH variations in the near-neutral region, due to the proton doping and dedoping of the PANI structure. Such unique properties together with its fine bio-compatibility enable the application of this material as a turn-on fluorescent probe for the labeling of acidic biotargets from sub-cellular to organ levels, providing potential applications in diagnosis and surgery guidance for certain diseases.
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