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1.
Transboundary and Emerging Diseases ; 2023, 2023.
Artigo em Inglês | Web of Science | ID: covidwho-20238770

RESUMO

Wild animals are considered reservoirs for emerging and reemerging viruses, such as the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Previous studies have reported that bats and ticks harbored variable important pathogenic viruses, some of which could cause potential diseases in humans and livestock, while viruses carried by reptiles were rarely reported. Our study first conducted snakes' virome analysis to establish effective surveillance of potential transboundary emerging diseases. Consequently, Adenoviridae, Circoviridae, Retroviridae, and Parvoviridae were identified in oral samples from Protobothrops mucrosquamatus, Elaphe dione, and Gloydius angusticeps based on sequence similarity to existing viruses. Picornaviridae and Adenoviridae were also identified in fecal samples of Protobothrops mucrosquamatus. Notably, the iflavirus and foamy virus were first reported in Protobothrops mucrosquamatus, enriching the transboundary viral diversity in snakes. Furthermore, phylogenetic analysis revealed that both the novel-identified viruses showed low genetic similarity with previously reported viruses. This study provided a basis for our understanding of microbiome diversity and the surveillance and prevention of emerging and unknown viruses in snakes.

2.
Case Studies in Construction Materials ; 18, 2023.
Artigo em Inglês | Scopus | ID: covidwho-2244499

RESUMO

Since the COVID-19 outbreak in late 2019, a surprisingly large amount of personal protective equipment, such as medical rubber gloves, have been frequently used, and this medical waste can cause very major environmental problems. A multidisciplinary collaborative approach is needed to combat the pandemic and lessen the environmental risks associated with the disposal of medical waste. This study developed an innovative approach by incorporating shredded rubber glove fibers (RGF) into aggregates to enhance the fatigue resistance of concrete. In this study, different volume contents (0.5%, 1.0%, 1.5%, 2.0%) of RGF were added to the aggregate for the first time. The effects of different RGF contents on the fatigue characteristics of concrete were examined through repeated loading tests and SEM analysis. The results show that the width and number of cracks produced by rubber glove fiber concrete (RGFC) after repeated loading are significantly reduced compared with normal concrete (NC). Following repeated loading, RGFC exhibited higher total, plastic, and elastic strain values than NC, demonstrating greater deformability and elasticity. However, the maximum total strain growth rate and the total strain growth range of the RGFC group were only 2.26 × 10−3/time and 14.0%, which were significantly smaller than the 3.8 × 10−3/time and 31.7% of the NC group, showing better stability, corresponding to enhance the fatigue resistance of concrete. The interfacial transition zone (ITZ) was abnormally smooth with a thin thickness and no visible gaps were discovered, based on the results of SEM test performed on the RGFC. The findings obtained in this study may provide new ideas for the resource utilization of medical waste. © 2023

3.
Building and Environment ; 231, 2023.
Artigo em Inglês | Scopus | ID: covidwho-2246533

RESUMO

In sparsely occupied large industrial and commercial buildings, large-diameter ceiling fans1 (LDCFs) are commonly utilized for comfort cooling and destratification;however, a limited number of studies were conducted to guide the operation of these devices during the COVID-19 pandemic. This study conducted 223 parametrical computational-fluid-dynamics (CFD) simulations of LDCFs in the U.S. Department of Energy warehouse reference building to compare the impacts of fan operations, index-person, and worker-packing-line locations on airborne exposures to infectious aerosols under both summer and winter conditions. The steady-state airflow fields were modeled while transient exposures to particles of varying sizes (0.5–10 μm) were evaluated over an 8-h period. Both the airflow and aerosol models were validated by measurement data from the literature. It was found that it is preferable to create a breeze from LDCFs for increased airborne dilution into a sparsely occupied large warehouse, which is more similar to an outdoor scenario than a typical indoor scenario. Operation of fans at the highest feasible speed while maintaining thermal-comfort requirements consistently outperformed the other options in terms of airborne exposures. There is no substantial evidence that fan reversal is beneficial in the current large space of interest. Reversal flow direction to create upward flows at higher fan speeds generally reduced performance compared with downward flows, as there was less airflow through the fan blades at the same rotational speed. Reversing flow at lower fan speeds decreased airflow speeds and dilution in the space and, thus, increased whole-warehouse concentrations. © 2023 Elsevier Ltd

4.
2021 International Conference on Big Data and Intelligent Decision Making, BDIDM 2021 ; : 171-176, 2021.
Artigo em Inglês | Scopus | ID: covidwho-1741140

RESUMO

Food security refers to the state where everyone can stably get enough food. If the food system can meet our nutritional needs at different stages of life in an economical, easy and sustainable way, it can be defined that the food system is safe. People make plans to determine the long-term capabilities and direction of the food system. The 2020 COVID-19 pandemic and the outbreak of the locust plague in eastern Africa have dimmed the economic outlook. Therefore, the Ω model is established which uses the entropy method to quantify the survival or decline of a food system with biodiversity, self-sufficiency, and average dietary energy supply. It is well known that the current state of the food system pays more attention to efficiency and profit. The Ω model adds the influence of environment, diet, gender differences, wealth gap, and political factors on the sustainability and fairness of the food system to the existing food system. The comprehensive evaluation of these four aspects of the food system greatly optimizes the reliability and applicability of the model, and helps decision-makers accurately formulate relevant policies. At the same time, the Ω model evaluates the food systems of developed and developing countries. It selected an important indicator from the three aspects of environment, equity and eating habits for the autoregressive integrated moving average model time series analysis, and set a threshold for the establishment of a fairer and sustainable food system. © 2021 IEEE

5.
3rd IEEE International Conference on Frontiers Technology of Information and Computer, ICFTIC 2021 ; : 174-177, 2021.
Artigo em Inglês | Scopus | ID: covidwho-1705666

RESUMO

In this paper, we aim to predict whether the patients are COVID-inflected or not using machine learning models, including AlexNet, VGG, YOLOv5, and ResNet18. Since the X-ray images are large for processing, we utilize image decomposition and selective search to decouple the images and then send them to the network to predict the label. We analyze the available dataset, which concludes that the VGG network obtains the best performance with 86.84%. Furthermore, we find that the detection process in image pre-processing can help the classification method to handle the prediction task. © 2021 IEEE.

6.
Applied Energy ; 308, 2022.
Artigo em Inglês | Scopus | ID: covidwho-1608905

RESUMO

To meet the 2060 carbon neutrality target, China will need to phase out existing coal-fired power plants by 2050 or before. The electricity supply sector directly employs over 2 million and an additional 2 million when indirect employment including product and machinery production are included. To investigate the policy options and pathways available to meet the national climate goal while transitioning this jobs-intensive and economically powerful sector, we developed a plant-level job accounting model, and combine it with a power sector optimization model to assess job loss in the coal sector, as well as job creation in the burgeoning renewable power sector in China. We find that national and provincial policy actions to support an early and managed transition help to ensure a job-rich and both geographically and socioeconomically equitable shift from coal to clean energy. Specifically, the projected decline in fossil-fuel jobs can be fully offset by job new creation in the expanding renewable energy sector. Current COVID-19 economic stimulus plans include a potential new coal boom, where China could build up to 247 GW of additional plants, and thus delay the transition by a decade or more. We find that this action would result in up to 90% of coal-fired workers losing jobs between 2030 and 2040 without a clear pathway to absorb these workers in what will be an already mature clean energy economy. Provinces with massive coal fleets and limited renewable energy resources, notably Anhui, Henan, Hebei and Shandong, etc., would face a particularly disruptive mismatch of job gains and losses. © 2021 Elsevier Ltd

7.
2021 International Conference on Energy, Power and Electrical Engineering, EPEE 2021 ; 2087, 2021.
Artigo em Inglês | Scopus | ID: covidwho-1592962

RESUMO

With the sudden outbreak and rapid spread of COVID-19, global economic development and social stability have been seriously affected. The virus mainly spreads infection among people on a large scale through the air. People are gradually focusing on how to use HVAC system, so that it can play a more efficient and positive role in epidemic prevention and control. Consequently, we designed an intelligent purification and disinfection apparatus for air-conditioning units. The apparatus integrates rapid virus detection and high-efficiency disinfection functions. It uses a modular design and different operating modes for different levels of epidemic periods. This apparatus is not only suitable for daily life, but also can meet the prevention and control requirements during the epidemic period, which takes the economy, energy saving, and environmental protection into account. © 2021 Institute of Physics Publishing. All rights reserved.

8.
Medical Journal of Wuhan University ; 42(5):704-708, 2021.
Artigo em Chinês | Scopus | ID: covidwho-1456546

RESUMO

Objective: To investigate the role of chest CT scan in the diagnosis and evaluation of COVID⁃19 by analyzing the imaging features of patients with COVID⁃19 at different stages. Methods: The clinical data and radiologic findings were retrospectively collected in medical staff who were confirmed COVID⁃19 and admitted in our hospital from January 10 to March 20, 2020. We analyzed the characteristics of clinical manifestations, the frequency and interval of chest CT scans in the course of illness, imaging features in different stages of diseases, and the CT imaging outcomes during follow⁃up. Results: A total of 95 patients who met the criteria were included. The average time from symptom onset to aggravation and to alleviation were 8.3 days and 17.6 days, respectively. Patients received an average of 5 chest CT scans. The average intervals from onset to the first positive CT signs, the most serious CT signs, and the CT signs starting to disappear were 3.5 days, 7.8 days and 15.7 days, respectively. The mean CT follow⁃up time were 38.2 days. The lung lesions were completely absorbed on CT images in 38 patients, or presented with disappearing of the CT signs in the other patients. No patients had serious fibrosis residues. Conclusion: Chest CT has high sensitivity for early diagnosis of COVID⁃19. The moderate and some serious COVID⁃19 patients have good outcomes on CT images by recent follow⁃up. The changes of clinical symptoms are consistent with the changes of chest CT signs, and both are easy indicators for the outcomes of COVID⁃19 patients. © 2021, Editorial Board of Medical Journal of Wuhan University. All right reserved.

9.
American Journal of Translational Research ; 13(6):6191-6199, 2021.
Artigo em Inglês | EMBASE | ID: covidwho-1445159

RESUMO

The aim of this study was to evaluate factors affecting the recurrence of positive RT-PCR results. By performing a retrospective analysis, we evaluated the clinical data of recurrent positive coronavirus disease 2019 (COVID-19) patients in multiple medical institutions in Wuhan. We recruited COVID-19 patients who were hospitalized from January 1 to March 10, 2020, in three tertiary hospitals in Wuhan, met the discharge criteria and received at least one additional nucleic acid test before leaving the hospital. According to the RT-PCR results, patients were split into a recurrent positive group (RPos group) and a nonrecurrent positive group (non-RPos group). Clinical characteristics, therapeutic schedules and antibody titers were compared between the two groups. AI-assisted chest high-resolution computed tomography (HRCT) technology was applied to investigate pulmonary inflammatory exudation and compare the extent of lung areas with different densities. This study involved 122 COVID-19 patients. There were no significant differences in age, sex, preexisting diseases, clinical symptoms, clinical classification, course of disease, therapeutic schedules or serum-specific antibodies between the two groups. A higher proportion of patients who showed pulmonary inflammatory exudation on HRCT scans were recurrent positive at the time of discharge than other patients (81.6% vs 13.7%, P < 0.01). In addition, the degree of pulmonary fibrosis was higher in the RPos group than in the non-RPos group (P < 0.05). Subpleural exudation at the peripheral edge of the lung and extensive pulmonary fibrosis at the time of discharge represent risk factors for the recurrence of COVID-19.

10.
Medical Journal of Wuhan University ; 42(4):594-598, 2021.
Artigo em Chinês | Scopus | ID: covidwho-1299712

RESUMO

Objective: To evaluate the clinical efficacy of Lopinavir-Ritonavir combined with interferon alpha on coronavirus disease 2019 (COVID-19). Methods: A prospective and real-world observational clinical research was conducted on COVID-19 cases who were admitted to the Renmin Hospital of Wuhan University from January 25, 2020 to February 12, 2020. Of the 109 cases involved, 58 cases were treated with interferon alpha (group A), while 58 cases were treated with Lopinavir-Ritonavir combined with interferon alpha (group B). The recent outcomes were compared between the two groups by Kruskal Wallis test or Chi square test. Results: The baseline data of the two groups were basically the same. On the 7th day after treatment, the lung inflammation in group B was higher than in group A, and the leukocyte count and neutrophil count in the normal range increased as compared with the baseline value in group B. On the 14th day after treatment, the leukocyte count, lymphocyte count, CD4/CD8 cell count increased as compared with the baseline value, while CRP decreased from baseline in the B group, with statistically significant differnce. Conclusion: Lopinavir-Ritonavir combined with interferon alpha can accelerate the improvement of pulmonary inflammation, and increase the levels of immune cells in COVID-19 patients. © 2021, Editorial Board of Medical Journal of Wuhan University. All right reserved.

11.
20th International Conference on Electronic Business, ICEB 2020 ; 2020-December:496-500, 2020.
Artigo em Inglês | Scopus | ID: covidwho-1232897

RESUMO

Crowdfunding is an emerging industry in the past decades, which proliferates and has attracted an enormous population from the public to be involved in various funding projects in multiple fields such as business entrepreneurship, healthcare, and fintech. Meanwhile, charitable crowdfunding platforms such as GoFundMe, Indiegogo, and Kickstarter have allowed internet users to provide help and donation to the fundraisers directly. As the year 2020 is surrounded by the COVID-19 global pandemic spreading out the world, the topic of coronavirus relief has surged. Thus, it is worthy of evaluating the crowdfunding campaign's effectiveness during the coronavirus context by making a connection between fundraising activities and coronavirus relief. This paper aims to investigate the effects of various factors affecting a donation-based crowdfunding campaign for coronavirus relief of food donation in the United States and determine the significant factors affecting the campaign's success rate. To achieve this research purpose, secondary data were extensively collected from the crowdfunding platform GoFundMe for regression analysis. The sample data was derived from crowdfunding campaigns launched from March 1st, 2020, to May 31st, 2020. During this period, the United States was severely affected by the COVID-19 pandemic with an exponentially surged number of confirmed cases. This paper derives the independent variables that have been examined from previous studies and further applies in the coronavirus context to identify whether these factors are significant influencers to the success of crowdfunding campaigns for coronavirus relief of food donation. The factors being examined include target funding amount, the existence of spelling mistakes, the presence of pictures, video, social network sites, project updates, comments between fundraisers and backers, and links to external websites. That the significant factors contributing to a successful funding project are similar, as identified in previous reward-based and equity crowdfunding studies. On the other hand, several independent variables' effectiveness varied between the normal scenario and the coronavirus context, as such variables demonstrate a much compelling role to attract donors for the coronavirus relief activations. The analysis is valuable and worthy of different viewpoints. First, understanding the donor's motivation and the success features of funding projects is valuable for fundraisers to have a strategic mindset for decision-making criteria when initiating funding projects to attract more donors and the amount of money. Second, because of the lack of literature focusing on examining the success features for donation-based crowdfunding campaigns, this study fills the gap and further focus on the crowdfunding activations in the context of coronavirus food relief in the US. Therefore, this study provides significant insight to understand the dynamics of the donation-based crowdfunding campaign and provides a recommendation to develop coronavirus relief more efficiently. © 2020 International Consortium for Electronic Business. All rights reserved.

12.
Chinese Traditional and Herbal Drugs ; 52(7):2178-2183, 2021.
Artigo em Chinês | Scopus | ID: covidwho-1190614

RESUMO

Traditional Chinese medicine injection, a scientific and technological innovation of traditional Chinese medicine, plays a unique advantage in the treatment of severe patients with new corona virus pneumonia (COVID-19). Epidemiological studies have found that a considerable number of severe patients with COVID-19 have cardiovascular diseases such as hypertension and coronary heart disease, which need to be controlled during anti-virus treatment, resulting in the increasingly prevalence of drug interactions between traditional Chinese medicine injections and chemical medicines. By consulting the literatures, we summarized the effects of eight commonly used traditional Chinese medicine injections in Diagnosis and Treatment Protocol for COVID-19 (Trial Version 8) on cytochrome P450 enzyme (CYP450), and analyzed their interaction with commonly used chemical medicines for cardiovascular diseases, so as to provide references for clinical rational administration and promote the advantages of traditional Chinese medicine against the epidemic disease. © 2021, Editorial Office of Chinese Traditional and Herbal Drugs. All right reserved.

14.
Chinese Journal of Urban and Environmental Studies ; 8(3):21, 2020.
Artigo em Inglês | Web of Science | ID: covidwho-1097029

RESUMO

The COVID-19 disease broke out globally, bringing great challenges to public health security and increasing the difficulties in constructing ecological civilization governance system. Under the leadership of the Central Committee of the Communist Party of China with Comrade Xi Jinping at its core, the Chinese Government and people have fought against the disease with courage and put people's health and safety first. Through hard work, China has made achievements in controlling the COVID-19 pandemic and accelerated the restoring of work and life back to normalcy. While continuing to control the pandemic domestically, China promotes the building of a human community with shared destiny, and plays an active role in promoting global cooperation in public health, contributing extraordinarily to global public health and world economy. Guided by Xi Jinping's Thought of Ecological Civilization, China has endeavored for modernization characterized by harmonious coexistence between man and nature. In response to the current crisis in public health and the challenges facing human-nature harmony thus incurred, the Editorial Department of Chinese Journal of Urban and Environmental Studies has co-hosted a seminar with CASS Thinktank for Eco-civilization Studies, aiming at brainstorming on and enhancing faith in continuing the building of an ecological civilization after completing the construction of a moderately well-off society in all respects. This paper intends to call for other countries to exchange and cooperate in building ecological civilization and building the world into a beautiful home for all.

15.
Regional Studies, Regional Science ; 8(1):51-53, 2021.
Artigo em Inglês | Scopus | ID: covidwho-1078787

RESUMO

In response to the outbreak of COVID-19, the Chinese government imposed stringent lockdown measures to minimize the spread of the disease. This paper shows that under these measures, the PM2.5 concentrations were lower in February 2020 than in February 2019. However, after the measures were removed, the PM2.5 concentration returned to the same level as in the previous year, thus implicating that the reduction was temporary. © 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

16.
American Journal of Translational Research ; 12(11):7501-7509, 2020.
Artigo em Inglês | EMBASE | ID: covidwho-962529

RESUMO

Background: COVID-19 patients showed certain characteristic features of multiple signs in bilateral lungs. Some patients only had a single pulmonary lobe lesion, which has not been reported previously. Single pulmonary lobe lesions are easily missed or misdiagnosed if they do not receive enough attention. Objective: To study the imaging manifestations, clinical features and outcomes of patients with COVID-19 with only one single pulmonary lobe lesion. Methods: Patient clinical data were collected only from patients with confirmed SARS-CoV-2 infection by RT-PCR, which was confined to only single lobe lesions on chest CT imaging findings at the onset. Which lobe was frequently involved, the imaging manifestations, clinical features and outcomes were also analyzed. Result: From January 1, 2020, to March 14, 2020, a total of 367 inpatients were diagnosed with COVID-19, in which 50 (13.6%) patients were confirmed with only one single pulmonary lobe lesion. The most frequently involved lobe was the right lower lobe (18 patients, 36%, highest). Lesions in the lower lobe easily spread to all lobes of the bilateral lungs (P<0.001, χ2=10.264), especially the left lower lobe, and were less frequent in the right upper lobe. During hospitalization, 2 (4%) patients were admitted to the ICU, 2 (4%) patients died, and 28 (56%) patients developed lesions in other lobes within 6.32±3.71 days. Conclusions: The general pattern of COVID-19 imaging with localized nodules may also cause severe respiratory symptoms of bilateral lung disease, serious complications, or even death in patients with multiple lobe lesions or bilateral lung lesions, which should not be underestimated.

17.
Eur Rev Med Pharmacol Sci ; 24(10): 5778-5782, 2020 May.
Artigo em Inglês | MEDLINE | ID: covidwho-541069

RESUMO

Since the end of 2019, China and other regions around the world have been facing a pandemic of novel coronavirus pneumonia (COVID-19). The virus is highly transmissible, and the human population is generally susceptible. Most patients with osteoporosis are postmenopausal women or elderly people with hypoimmunity, so the osteoporosis clinic has become a new hotspot for corona virus infection. During the COVID-19 pandemic, it is necessary to establish standardized out-patient protocols to provide safe and effective treatment for osteoporosis patients and medical staff. In an osteoporosis clinic, we advocate the following suggestions to prevent and control osteoporosis during the pandemic period: (1) specialized diagnosis and treatment techniques for osteoporosis patients in the outpatient care, including enhancing the prevention for outpatient medical staff, strengthening awareness of COVID-19 prevention, strictly screening outpatients with COVID-19 infection, and insistent administration of anti-osteoporosis drugs during outbreaks; (2) home prevention for osteoporosis patients including keeping windows open, exposing them to sunlight, supplementing them with enough protein, exercising regularly, and administrating calcium supplements; and (3) simplifying the follow-up and evaluation of osteoporosis using online platforms.


Assuntos
Infecções por Coronavirus/diagnóstico , Osteoporose/patologia , Pneumonia Viral/diagnóstico , Betacoronavirus , Conservadores da Densidade Óssea/uso terapêutico , COVID-19 , Cálcio/administração & dosagem , Infecções por Coronavirus/complicações , Infecções por Coronavirus/epidemiologia , Infecções por Coronavirus/virologia , Suplementos Nutricionais , Humanos , Estilo de Vida , Corpo Clínico/psicologia , Medicina Tradicional Chinesa , Osteoporose/complicações , Osteoporose/tratamento farmacológico , Pacientes Ambulatoriais , Pandemias , Pneumonia Viral/complicações , Pneumonia Viral/epidemiologia , Pneumonia Viral/virologia , SARS-CoV-2 , Vitamina D/administração & dosagem
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