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1.
Chinese Journal of Disease Control and Prevention ; 25(4):405-410, 2021.
Article in Chinese | Scopus | ID: covidwho-1566854

ABSTRACT

Objective To explore the lag effect of daily average temperature on the incidence of coronavirus disease 2019 (COVID-19) in Hunan Province and to provide scientific evidences for effective prevention of COVID-19.  Methods  The meteorological factors, the air quality factors and the data conincidence of COVID-19 reported in Hunan Province during January 21, 2020 to March 2, 2020 were collected. Spearman correlation and distributed lag non-linear model analysis were performed.  Results  A total of 1 018 COVID-19 cases were reported in Hunan Province. The distribution lag non-linear model results showed that the influence of daily average temperature on the incidence of COVID-19 presented a nonlinear relationship. The cumulative relative incidence risk of COVID-19 decreased with the increase of daily average temperature, and the lowest temperature risk of the patients was 0 ℃. Both cold temperature and hot temperature increased incidence risk of COVID-19. It was indicated that the hot effects were immediate, however, the cold effects with obvious lag effect persisted up to 12 days. The highest relative risk of COVID-19 incidence was associated with lag 8-day daily average temperature of -5 ℃(RR=2.20, 95% CI=1.16-4.19). The influence of high temperature(10 ℃) was more significant than that of low temperature(6 ℃).  Conclusion  The daily average temperature, especially cold or hot temperature, was an important influencing factor of the incidence of COVID-19 in Hunan Province, which had lag influence on the incidence of COVID-19. We suggested that some related preventive measures should be adopted to protect vulnerable population and severe patients to reduce the incidence risk. © 2021, Publication Centre of Anhui Medical University. All rights reserved.

2.
IEEE/WIC/ACM International Joint Conference on Web Intelligence and Intelligent Agent Technology (WI-IAT) ; : 735-740, 2020.
Article in English | Web of Science | ID: covidwho-1398308

ABSTRACT

COVID-19 pandemic has profoundly changed many aspects of Chinese society. In the education field, the alternative online education system functions not only as a timely substitution but also as a new direction. This article examines the evaluation of online education systems by using the contents of blogs about online courses that are shared on Weibo China's social media network. By exploring the blogs' emotional tendency, this article aims to describe the characteristics of alternative online education systems in the events of risks and to discuss optimized programs for future online education.

3.
Proceedings of 2020 China Marketing International Conference ; : 1276-1283, 2020.
Article in Chinese | Web of Science | ID: covidwho-1371157

ABSTRACT

The novel coronavirus (the following is named COVID-19) epidemic in 2020 has greatly stimulated the development of "stay-at-home economy", and then affected the business pattern of all walks of life. During the epidemic, people were forced to be quarantined, which greatly increased the time of staying at home, offline demand quickly shifted to online. Users' habits and behavior of short video platform changed greatly, "short video + live", "short video + e-commerce" ,"short video + social" and other operation combination forms developed rapidly. Based on the special factors of epidemic stay-at-home economy, this paper studies the changes of users' behavior and habits brought by epidemic stay-at-home economy and analyzes the effects of these variables on "short video +" industry content generation mode, one of the important components of MCN (multi-channel Network) mode. It is concluded that "short video +" industry content generation mode has moved from PGC (professional production content), OGC (occupationally production content), UGC (user production content) to PUGC (professional user production content) based, plus 3C drive together. At the same time, combined with the current industry hot cases, analyze and promote the new "short video +" industrial chain business model, which will continue works for a long time from content production to operation, to user acquisition, then to commercial realization even after the end of the epidemic in the future.

4.
Online Learning ; 25(1):182-194, 2021.
Article in English | Web of Science | ID: covidwho-1155032

ABSTRACT

While all higher education was affected by the COVID-19 pandemic, study abroad programs were uniquely challenged by the associated restrictions and limitations. This case study integrates a Collaborative Online International Learning (COIL) pedagogy approach and virtual reality (VR) technologies into the curriculum redesign process to transform a business study abroad course into an online format. Using VR technology, U.S. students and their international partners in Germany, Brazil, and India created and shared cultural exchange virtual tours. The redesigned online study abroad course engaged students in active learning activities and cultivated students' intercultural competence development.

5.
Zhonghua Jie He He Hu Xi Za Zhi ; 43(4): 332-334, 2020 Apr 12.
Article in Chinese | MEDLINE | ID: covidwho-591071

ABSTRACT

Endotracheal intubation is an independent risk factor for respiratory infectious diseases. We conducted a retrospective study in 12 cases with COVID-19 who underwent endotracheal intubation at ICU of the Guangzhou eighth hospital from January 20 to February 10, 2020. The intubation procedure, anesthetic regimen, and complication were collected and analyzed. The 9 healthcare workers who involved in intubation received virus nucleic acid test and 14 days temperature monitoring. All 12 patients were successfully intubated under the guidance of bronchoscope, without any complications. Midazolam, Propofol and Morphine or fentanyl were used for sedation and analgesia, avoiding patients cough and agitated during the procedure. The 9 healthcare workers were protected under the Personal Protective Equipment(PPE) with positive pressure protective hood. The detection of oropharyngeal swab virus nucleic acid were negative in all 9 healthcare workers, none of them had fever or any respiratory symptoms. The PPE with positive pressure protective hood should be needed to perform bronchoscope-guided endotracheal intubation in patients with COVID-19, it could strengthen to protect healthcare workers from virus exposure.


Subject(s)
Bronchoscopes , Coronavirus Infections/therapy , Intubation, Intratracheal , Personal Protective Equipment , Pneumonia, Viral/therapy , Betacoronavirus , COVID-19 , China , Coronavirus Infections/prevention & control , Humans , Infection Control , Intensive Care Units , Pandemics/prevention & control , Pneumonia, Viral/prevention & control , Retrospective Studies , SARS-CoV-2
6.
Zhonghua Jie He He Hu Xi Za Zhi ; 43(4): 339-344, 2020 Apr 12.
Article in Chinese | MEDLINE | ID: covidwho-72745

ABSTRACT

The rapid spread of the coronavirus disease 2019 (COVID-19) has become a global threat. But the pathogenesis and treatment of the disease are not clear yet. Virological researches revealed close relationship between 2019-nCoV and SARS-CoV. The experience and knowledge we gained from severe acute respiratory syndrome (SARS), especially with regard to the time course of viral replication, host immune response and clinical progression of the patient, may provide important insights into understanding and management of COVID-19. Clinical deterioration accompanied by decreasing viral load in the second week after symptom onset was noted both in SARS and COVID-19, suggesting that the lung damage at this phase is more related to excessive host immune response rather than uncontrolled viral replication.


Subject(s)
Coronavirus Infections/therapy , Coronavirus Infections/virology , Pneumonia, Viral/therapy , Pneumonia, Viral/virology , SARS Virus , Severe Acute Respiratory Syndrome/therapy , Severe Acute Respiratory Syndrome/virology , Betacoronavirus , COVID-19 , Coronavirus Infections/immunology , Disease Progression , Humans , Pandemics , Pneumonia, Viral/immunology , SARS-CoV-2 , Severe Acute Respiratory Syndrome/immunology , Viral Load , Virus Replication
7.
Zhonghua Xin Xue Guan Bing Za Zhi ; 48(6): 456-460, 2020 Jun 24.
Article in Chinese | MEDLINE | ID: covidwho-8400

ABSTRACT

Objective: To analyze the clinical characteristics of the severe or critically ill patients with novel coronavirus pneumonia (COVID-19), and evaluate the impact of complicated myocardial injury on the prognosis of these patients. Methods: A retrospective study was conducted in 54 patients who admitted to Tongji hospital from February 3, 2020 to February 24, 2020 and met the criteria of severe or critical conditions of COVID-19. The clinical characteristics and hospital mortality rate were analyzed and compared between the patients with or without myocardial injury, which was defined with 3 times higher serum cardiac troponin value. Results: The age of the 54 patients was 68.0(59.8, 74.3) years. Among all the patients, 24 (44.4%) patients were complicated with hypertension, 13 (24.1%) with diabetes, 8 (14.8%) with coronary heart disease, and 3 (5.6%) with previous cerebral infarction. During hospitalization, 24 (44.4%) of the patients were complicated with myocardial injury and 26 (48.1%) patients died in hospital. In-hospital mortality was significantly higher in patients with myocardial injury than in patients without myocardial injury (14 (60.9%) vs. 8 (25.8%), P=0.013). Moreover, the levels of C-reactive protein (153.6 (80.3, 240.7) ng/L vs. 49.8 (15.9, 101.9) ng/L) and N-terminal pro-B-type natriuretic peptide (852.0 (400.0, 2 315.3) ng/L vs. 197.0 (115.3, 631.0) ng/L) were significantly higher than patients without myocardial injury (all P<0.01). Conclusions: Prevalence of myocardial injury is high among severe or critically ill COVID-19 patients. Severe or critically ill COVID-19 patients with myocardial injury face a significantly higher risk of in-hospital mortality. The study suggests that it is important to monitor and manage the myocardial injury during hospitalization for severe or critically ill COVID-19 patients.


Subject(s)
Betacoronavirus , Coronavirus Infections , Critical Illness , Heart Injuries , Pandemics , Pneumonia, Viral , Aged , COVID-19 , Coronavirus Infections/complications , Humans , Middle Aged , Pneumonia, Viral/complications , Retrospective Studies , SARS-CoV-2
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