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1.
Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi ; 35(2): 213-216, 2023 Apr 25.
Article in Chinese | MEDLINE | ID: covidwho-20239137

ABSTRACT

OBJECTIVE: To perform an epidemiological investigation on a case of visceral leishmaniasis reported from Shule County, Kashi Prefecture, Xinjiang Uygur Autonomous Region in 2021, so as to provide insights into differential diagnosis of visceral leishmaniasis during the COVID-19 pandemic. METHODS: The epidemiological history of this case was collected, and the case was diagnosed for Leishmania infection with the immunochromatographic (rK39) strip test, bone marrow smear microscopy and PCR assay. RESULTS: The patient had typical clinical symptoms of leishmaniasis, including irregular fever, hepatosplenomeg- aly, low serum albumin and elevated globulin. Bone marrow smear microscopy identified L. donovani amastigotes, and both rK39 strip test and PCR assay were positive, while the case was tested negative for SARS-CoV-2. COVID-19 was therefore excluded and visceral leishmaniasis was diagnosed. Standard full-dose treatment with sodium stibogluconate was given, and no Leishmania was found on blood smears during the reexamination. No recurrence was found during the followup after discharge for hospital. CONCLUSIONS: During the COVID-19 pandemic, it is recommended to increase the perception of differential diagnosis of visceral leishmaniasis among first-contact doctors, and reinforce the capability of differential diagnosis and health education of visceral leishmaniasis among medical and healthcare institutions at all levels, to prevent missed diagnosis and misdiagnosis of visceral leishmaniasis.


Subject(s)
COVID-19 , Leishmania donovani , Leishmaniasis, Visceral , Humans , Leishmaniasis, Visceral/diagnosis , Leishmaniasis, Visceral/drug therapy , Leishmaniasis, Visceral/epidemiology , Pandemics , COVID-19/diagnosis , COVID-19/epidemiology , SARS-CoV-2
2.
Cogent Arts & Humanities ; 10(1), 2023.
Article in English | Web of Science | ID: covidwho-2326517

ABSTRACT

Classical gardens in Suzhou were designed not only as an art of work but also for use in daily life. This study explored the tourist experience in the Net Master's Garden in Suzhou, China, as a restorative environment based on attention restoration theory. Analysis of the results of the on-site questionnaire survey revealed three dimensions of perceived restorative characteristics: "fascination-compatibility", "being away" and "extent". Using multiple correspondence analysis, we also found three types of restorative experiences influenced by different activities and landscape impressions: a salient sightseeing experience, an immersive experience and a low restorative experience. In a salient sightseeing experience, when strolling visitors enjoyed the varying picturesque views, they perceived "fascination-compatibility" and "being away" more strongly. In an immersive experience, the visitors tended to do leisure activities, acquired a holistic sense of the garden, and perceived "extent" and "fascination-compatibility" more strongly. Visitors who acted more passively tended to perceive a low restorative experience. We think this study provides clues to expanding the meaning of garden visits from "appreciation" to "restoration" for both garden management and garden visitors. The classical garden might play a more important role in pleasure-derived leisure experiences in local areas, especially during times of the COVID-19 pandemic.

3.
Topics in Antiviral Medicine ; 31(2):215, 2023.
Article in English | EMBASE | ID: covidwho-2320550

ABSTRACT

Background: Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is a novel and highly pathogenic coronavirus and is the causative agent of COVID-19, an ongoing pandemic that has posed a serious threat to public health and global economy. Thus, there is a pressing need for therapeutic interventions that target essential viral proteins and regulate virus spread and replication. To invade the host cell, the receptor-binding domain (RBD) of SARS-CoV-2 Spike protein binds to the host cell's ACE2 receptor, followed by cleavage events that allow the Spike protein to fuse with the host cell membrane. Thus, the essential role of Spike protein in ACE2 receptor binding and viral fusion makes it a prime target for therapeutic interventions. Method(s): We performed molecular docking and molecular dynamics (MD) simulation-based virtual screening against SARS-CoV-2 RBD/ACE2 interface using a commercial library of 93,835 drug-like compounds. Compounds with promising docking poses and scores were selected for further MD simulation refinement, from which ten lead compounds were identified. Antiviral potencies of ten lead compounds were evaluated against lentiviral vectors pseudotyped with SARS-CoV-2 Spike to down select to a single lead compound, SAI4. ELISA-based assays were employed to determine the binding affinities of SAI4 to recombinant SARS-CoV-2 RBD. Antiviral potential of SAI4 was validated against genuine SARS-CoV-2 in a BSL3 setting. Result(s): We identified SAI4 as a candidate small molecule, which inhibited SARS-CoV-2 pseudovirus entry with IC50 value of ~18 muM. We determined that SAI4 binds RDB with a Kd of ~20 muM. Using cells engineered to express ACE2 and cells that express physiological levels of ACE2, we found that SAI4 inhibited SARS-CoV-2 pseudovirus entry at both engineered and physiological ACE2 levels. We validated the antiviral potential of SAI4 against genuine SARS-CoV-2 and HCoV-NL63. Lastly, we demonstrated antiviral potential of SAI4 against four SARS-CoV-2 variants of concern (alpha, beta, gamma, and delta). Conclusion(s): Using virtual screening, we identified SAI4 as the promising hit compound which displayed inhibitory activities against SARS-CoV-2 entry and its four variants of concern. Thus, our study will pave the way for further development of small molecules for therapeutic targeting of SARS-CoV-2 entry to combat the COVID-19 pandemic.

4.
Medical Journal of Wuhan University ; 43(6):885-890, 2022.
Article in Chinese | Scopus | ID: covidwho-2316738

ABSTRACT

Objective: To provide a basis for the early identification and treatment of severe and critical coronavirus disease 2019 (COVID - 19) by analyzing the clinical characteristics of the death cases. Methods: We retrospectively analyzed the clinical characteristics of 71 COVID - 19 cases which died during hospitalization. The clinical data included general data, underlying disease, clinical manifestation, biochemical laboratory examination, imaging examination, complications, and treatment, then the influencing factors of in - hospital survival were analyzed. Results: Most of the 71 patients were ≥60 years old (78. 9%) and had underlying diseases (74. 6%), in which hypertension ranked first, and fever was the most common first symptom. Biochemical laboratory tests showed that D-Dimer and C-reactive protein maintained at high levels during hospitalization, and lymphocyte count declined. Leukocyte/neutrophil counts, neutrophil to lymphocyte ratio, procalcitonin, creatine kinase, and lactate dehydrogenase increased. The main imaging features of the dead cases were the multifocal ground glass changes and consolidation of the lungs. The most common complications were acute respiratory distress syndrome (89. 9%), shock (34. 3%), and acute myocardial injury (30. 4%). 90% of the patients received auxiliary ventilation, and the decrease of blood oxygen saturation and the increase of procalcitonin may be the risk factors for shorter in-hospital survival. Conclusion: Severe and critical COVID-19 patients show different characteristics in clinical manifestations, biochemical laboratory examination, imaging examination, complications, and treatment reactions, which need early identification and treatment, and bewaring of acute respiratory distress syndrome and multiple organs failure. © 2022 Editorial Board of Medical Journal of Wuhan University. All rights reserved.

5.
4th International Conference on Frontiers Technology of Information and Computer, ICFTIC 2022 ; : 1073-1077, 2022.
Article in English | Scopus | ID: covidwho-2293330

ABSTRACT

With the worldwide spread of COVID-19, people's life safety has been greatly threatened. So, we consider using YOLOv3-tiny algorithm to detect mask wearing. Since there are few detection models for correctly wearing masks, we decided to use three classifications to detect correctly wearing masks, incorrectly wearing masks, and not wearing masks. Besides, in order to enhance the performance of our model in small object detection, we propose the k-means++ algorithm to make the size of the initial anchor boxes closer to the actual size of the object, and add a YOLO detection layer to effectively improve the accuracy of a small object. The results show that the mAP@50 values of our model are 4.68% higher than YOLOv3-tiny algorithm. Our model has significantly improved the detection ability of crowd scenes, and mask detection is more accurate and robust, which has good application value for mask detection in natural scenes. © 2022 IEEE.

6.
Chinese Journal of Applied Clinical Pediatrics ; 35(2):97-104, 2020.
Article in Chinese | EMBASE | ID: covidwho-2288487

ABSTRACT

Novel Coronavirus Pneumonia (NCP) is a class B infectious disease, which is prevented and controlled according to class A infectious diseases. Recently, children's NCP cases have gradually increased, and children's fever outpatient department has become the first strategic pass to stop the epidemic.Strengthening the management of the fever diagnosis process is very important for early detection of suspected children, early isolation, early treatment and prevention of cross-infection. This article proposes prevention and control strategies for fever diagnosis, optimizes processes, prevents cross-infection, health protection and disinfection of medical staff, based on the relevant diagnosis, treatment, prevention and control programs of the National Health and Health Commission and on the diagnosis and treatment experience of experts in various provinces and cities. The present guidance summarizes current strategies on pre-diagnosis;triage, diagnosis, treatment, and prevention of 2019-nCoV infection in common fever, suspected and confirmed children, which provide practical suggestions on strengthening the management processes of children's fever in outpatient department during the novel coronavirus pneumonia epidemic period.Copyright © 2020 by the Chinese Medical Association.

7.
Chinese Journal of Applied Clinical Pediatrics ; 36(18):1426-1428, 2021.
Article in Chinese | EMBASE | ID: covidwho-2254649

ABSTRACT

Clinical data and follow-up of a case of congenital disorder of glycosylation type Ia (CDG-Ia) combined with dilated cardiomyopathy admitted to the Department of Cardiology, Children's Hospital of Nanjing Medical University were analyzed retrospectively.The 5-year-old female patient was admitted in December 2016 due to recu-rrent shortness of breath for 2 months.Clinical symptoms and signs included repeated attacks of shortness of breath, physical retardation, malnutrition, binocular esotropia, multiple episodes of hypoglycemia, hepatosplenomegaly, hypotonia and other multi-system damages.Cardiac echocardiography suggested the feature of dilated cardiomyopathy, including the significant enlargement of the left ventricle, and decreased systolic function.Genetic testing revealed a compound heterozygous mutation in the PMM2 gene, and as a result, the patient was diagnosed as CDG-Ia.The patient's condition improved after symptomatic treatments such as Cedilanid, Dopamine, Dobutamine, Furosemide, as well as support treatments like myocardium nutrition, blood sugar maintenance, liver protection, etc.After discharge, the patient was given oral Digoxin, Betaloc, Captopril and diuretics, and hypoglycemia-controlling agents.The patient was followed up every 3-6 months.After more than 2 years of follow-up, the heart function and heart enlargement gradually returned to normal.During the Corona Virus Disease 2019 outbreak, self-withdrawal continued for 2 months.Re-examinations showed decreased cardiac function and enlarged left ventricle again.Medications were resumed again, and the patient was followed up closely.This case report suggested that CDG-Ia may be associated with dilated cardiomyopathy, and the cardiac phenotype may be improved by symptomatic supportive treatment.Copyright © 2021 by the Chinese Medical Association.

8.
North American Journal of Economics and Finance ; 64, 2023.
Article in English | Scopus | ID: covidwho-2242808

ABSTRACT

COVID-19 seriously affects the tourism and hospitality industry. In this study, we investigate the behavior of 40 tourism and hospitality stock market indices worldwide from two perspectives. First, empowered by the Granger causality test and network analysis, we test the spillover effects among these stock markets and find that the dynamics of interconnectedness network structures differ significantly in the pre-pandemic and in-pandemic periods. Second, we employ econometric models to explore how the influence of COVID-19 on these stock markets varies by considering the interconnectedness structure, the government response stringency index, and other country-level characteristics. We find that the interconnectedness structure significantly and robustly affects stock returns in the tourism and hospitality markets. Our investigation provides a better understanding of the impact of COVID-19 on tourism and hospitality industry. © 2022 Elsevier Inc.

9.
International Journal of Contemporary Hospitality Management ; 2023.
Article in English | Scopus | ID: covidwho-2239749

ABSTRACT

Purpose: Because of the COVID-19, the digital transformation of global hospitality and tourism speeds up. This paper aims to provide comprehensive frame of the digital transformation for further hospitality and tourism research. Design/methodology/approach: Through conducting a critical review of the impact of COVID-19, the current situation about the application of digital technology and digital transformation in hospitality and travel, this study used a qualitative approach to present the viewpoints. Findings: This research presents a theoretical research framework for the hospitality and tourism about digital transformation, including possible directions, contexts and methods. It highlights the importance of digital transformation, and further proposing specific research topics. Research limitations/implications: This research brings valuable implications and guidance for future research from the aspects of key research streams, research context and methodological approaches in hospitality and tourism about digital transformation. Originality/value: This paper supplies existing critical reviewed research through paying attention to the digital transformation approach in hospitality and tourism, providing research guidance technically to the industry of hotels and travel. © 2022, Emerald Publishing Limited.

10.
European Journal of Psychology of Education ; 38(1):269-285, 2023.
Article in English | Scopus | ID: covidwho-2246172

ABSTRACT

Due to the impact of COVID-19, children and their parents are spending more time at home, which increases parent–child interactions. The goals of the present study were to examine the mediating effects of children's learning engagement on the relationships of parental involvement in Chinese, English, and math performance and to investigate whether parent-perceived parental involvement and child-perceived parental involvement consistently affected children's academic performance. Data were collected from 253 Chinese primary school students (117 boys, Mage = 10.53) during the COVID-19 pandemic. We included parental involvement perceived by the parents and by the children to comprehensively describe parental involvement (in wave 2);we collected children's learning engagement (wave 2);and we compared children's Chinese, English and math academic performances before (wave 1) and after (wave 3) China's first wave of COVID-19 in 2020. The results showed that after controlling for gender, age, and SES, the parental involvement perceived by parents could be directly and positively related to children's learning engagement, and it also indirectly influenced children's learning engagement through the children's perceived parental involvement. Learning engagement was a mediator of the relationship between parental involvement and children's academic performance. Parental involvement significantly predicted children's Chinese and English performances through their learning engagement, while parental involvement failed to predict children's mathematics performances during the COVID-19 pandemic. The current research provides insights into the underlying mechanisms of how parental involvement affects children's academic performances during school closures and hopes to guide parents and schools to consider how to cooperate and continue to use rapidly developing digital education resources amid the long-term impact of COVID-19 to provide children using more effective and suitable guidance in the future. © 2022, Instituto Universitário de Ciências Psicológicas, Sociais e da Vida.

11.
International Journal of Contemporary Hospitality Management ; 2023.
Article in English | Scopus | ID: covidwho-2191391

ABSTRACT

Purpose: Because of the COVID-19, the digital transformation of global hospitality and tourism speeds up. This paper aims to provide comprehensive frame of the digital transformation for further hospitality and tourism research. Design/methodology/approach: Through conducting a critical review of the impact of COVID-19, the current situation about the application of digital technology and digital transformation in hospitality and travel, this study used a qualitative approach to present the viewpoints. Findings: This research presents a theoretical research framework for the hospitality and tourism about digital transformation, including possible directions, contexts and methods. It highlights the importance of digital transformation, and further proposing specific research topics. Research limitations/implications: This research brings valuable implications and guidance for future research from the aspects of key research streams, research context and methodological approaches in hospitality and tourism about digital transformation. Originality/value: This paper supplies existing critical reviewed research through paying attention to the digital transformation approach in hospitality and tourism, providing research guidance technically to the industry of hotels and travel. © 2022, Emerald Publishing Limited.

12.
Journal of Chinese Agricultural Mechanization ; 43(9):165-173, 2022.
Article in Chinese | Scopus | ID: covidwho-2203863

ABSTRACT

In the context of the complex international situation and novel Coronavirus pandemic, the issue of food security in China has become more important. Shaanxi province is an important agricultural production base in northwest China. It is of great significance to explore and analyze the spatial-temporal evolution characteristics and driving factors of cultivated land pressure in Shaanxi Province. This study is based on the number and distribution situation of cultivated land from 1995 to 2019 in Shaanxi, the minimum area of cultivated land per capita Sminand cultivated land pressure index P measure, to integrate the traditional difference index, establish the overall differentiation measure index of GDI, reference gravity mobile model and overall differentiation measure index of GDI describe the spatial and temporal variation characteristics of cultivated land pressure in the area. The driving factors of cultivated land pressure change were analyzed and discussed by using grey correlation analysis method. The results showed that the cultivated land area in Shaanxi province decreased firstly and then increased from 1995 to 2019. The cultivated land pressure index showed a downward trend, and remained at the level of "warning pressure" for a long time, with a small variation range. The center of cultivated land pressure in Shaanxi province was located in Guanzhong area, and moved northwestward first, then southward year by year. The spatial differentiation of cultivated land pressure in Shaanxi province was not obvious before 2003, and the state was relatively stable, and the differentiation pattern became more and more obvious after 2003. Frost-free period, precipitation, grain yield per unit, fertilizer use, income of rural residents, income of urban residents, economic development level and industrial level had significant effects on cultivated land pressure in Shaanxi Province from 1995 to 2019. © 2022 Journal of Chinese Agricultural Mechanization Editorial Office. All rights reserved.

13.
Chinese Journal of School Health ; 43(10):1539-1543, 2022.
Article in Chinese | Scopus | ID: covidwho-2155911

ABSTRACT

Objective To explore the relationship between group risk perception, self-efficacy and attitudes among college students, and its associations with individual prevention and control behaviors regarding COVID-19 pandemic. Methods From October to November 2021, data were collected among 4 092 undergraduate students from eight colleges and universities in Anhui Province, using a multi-stage stratified cluster sampling method. A t-teat and analysis of variance were performed for comparison between groups, while multiple linear regression was employed to investigate group risk perception, self-efficacy and attitudes among college students in terms of individual COVID-19 prevention and control measures. Results The total scores of group emotional risk perception (ARP), cognitive risk perception (CRP), distance perception (DIP) and self-efficacy were (19.72±4.01) (14.56± 3.64)(18.04±5.33) and (27.27±6.74), respectively. The total score of attitudes and beliefs was (26.15±4.54), while individual prevention and control behavior was (25.67±4.45). Emotional risk perception (B = 0.16), cognitive risk perception (B = 0.08), attitudes (B = 0.23) and self-efficacy (B = 0.13) were positively correlated with individual prevention and control behaviors of college students(P<0.05). However, distance risk perception had no significant effect (P>0.05). Conclusion Risk perception, self-efficacy and attitude of college students are correlated with individual COVID-19 prevention and control behaviors. Therefore, colleges and universities should strengthen general self-efficacy and attitude, and improve risk awareness towards COVID-19 among college students, and promote the effective prevention and control of campus epidemic. © 2021 Chinese Medical Journals Publishing House Co.Ltd. All rights reserved.

14.
Journal of Chinese medicinal materials ; 44(4):1021-1030, 2021.
Article in Chinese | EMBASE | ID: covidwho-2145400

ABSTRACT

Corona Virus Disease 2019(COVID-19)constitutes a pandemic worldwide, the novel coronavirus(SARS-CoV-2)is still the focus of prevention and control before the full spread of vaccines.Prevention is the key to controlling the epidemic. The Health Management Administration of the various provinces and cities have released the "Traditional Chinese Medicine Diagnosis and Treatment Programs for New Coronavirus Pneumonia" in response to the epidemic situation, among them including a lot of preventive prescriptions of TCM, which emphasizes to adhere to the advanced disease prevention concept of TCM preventing treatment of disease, and based on the principle of "strengthening vital energy and expelling pathogenic factors", through the methods of taking traditional Chinese medicine, medicated diet, medicated tea, acupuncture and guidance, and actively mobilizes the vital qi of human body and strengthen the physique, so as to achieve the epidemic prevention purpose of "the vital qi is stored in the body, the pathogenic factors cannot". The article reviews the prevention programs of TCM issued by various regions, analyzes and summarizes the rules of preventive medicine of TCM, in order to provide reference for the general public and the front-line clinical prevention of COVID-19. Copyright © 2021, Central Station of Chinese Medicinal Materials Information, National Medical Products Administration. All right reserved.

15.
Chinese Journal of Biologicals ; 35(3):293-298 and 303, 2022.
Article in Chinese | EMBASE | ID: covidwho-2102632

ABSTRACT

Objective To establish a sample panel for detection of severe acute respiratory symptom coronavirus 2 (SARS-CoV-2) antigen and apply to the development and quality evaluation of SARS-CoV-2 antigen colloidal gold test cassettes. Methods A sample panel for detection of SARS-CoV-2 antigen was established using 12 kinds of bulks of inactivated non-SARS-CoV-2 vaccine as negative controls, while two batches (Bl and B2) of bulks of inactivated SARS-CoV-2 vaccine (Bl, B2) and one batch (SI) of inactivated SARS-CoV-2 culture as positive controls. Bl was used as a positive control to evaluate the colloidal gold test cassettes from four manufacturers (A, B, C and D), and to monitor the development process of cassette from manufacturer A to improve its sensitivity. The negative sample panel was used to evaluate the specificity of colloidal gold test cassettes from five manufacturers (A, C, E, F and G), while positive sample panel (B2, SI and recombinant N protein) to evaluate the sensitivity. Inactivated SARS-CoV-2 culture SI was deter-mined with the commercial SARS-CoV-2 nucleic acid detection kit, and the result was compared with that by the colloidal gold test cassette from manufacturer A. Results N protein was determined as the main epitope of SARS-CoV-2 antigen by evaluation with positive control. The colloidal gold test cassettes from manufacturer A showed a sensitivity of 1 : 2 x 103to B1. The colloidal gold test cassettes from five manufacturers showed no cross reactions with inactivated non-SARS-CoV-2 vaccines, indicating a high specificity. The sensitivity of colloidal gold test cassette from manufacturer A was 106to B2 and 1 : 2 x 107to S1. However, the sensitivities of colloidal gold test cassettes from manufacturers E, F and were more than 1 : 103to B2 and 1 : 104- 1 : 105to SI, and that from manufacturer C was 1 : 104to B2 and 1 : 106to SI. The sensitivity of colloidal gold test cassette from manufacturer A was 100 pg/mL, while those from the other four manufacturers were 10 pg/mL, to recombinant N protein. The sensitivity of commercial nucleic acid detection kit to SI was 1 : 107, which was equal to that of colloidal gold test cassette from manufacturer A (1 : 2 x 107). Conclusion A sample panel for detection of SARS-CoV-2 antigen was successfully established, which showed high specificity and sensitivity, and might be used for the development and quality evaluation of SARS-CoV-2 antigen colloidal gold test cassettes. Copyright © 2022 Changchun Institute of Biological Products. All rights reserved.

16.
1st IEEE IAS Global Conference on Emerging Technologies, GlobConET 2022 ; : 115-120, 2022.
Article in English | Scopus | ID: covidwho-2058828

ABSTRACT

LiDAR sensors are widely used in autonomous driving, mobile robotics, aerospace, manufacturing, and many other fields. The speed, reliability, and range of LiDAR sensors can be affected by environmental conditions and usage patterns. Each application requires a deep understanding of sensor limitations. This paper explores the operational parameters of one of the most miniature and least expensive LiDAR sensors packaged in a wearable case. The target application, in this case, is social distancing during pandemics. This study focuses on the performance of miniature LiDAR sensors under different levels of light intensity, temperature, distance to the object, object size, angle of view, and object color. The experimental data enables a match between the sensor capabilities and application scenarios and provides direction for future work in improving the wearable sensors of this class. © 2022 IEEE.

17.
Fundamental Research ; 1(6):838-839, 2021.
Article in English | Web of Science | ID: covidwho-2041754

ABSTRACT

In 2020, the COVID-19 pandemic has brought "digital contact tracing" to the forefront of public attention. In the context of COVID-19, technology has offered public health investigators a new capability for locating infected individuals, i.e., digital contact tracing. Through this technology, investigators were able to track the location of patients without relying on their memory, which alleviated disease surveillance pressure. The practical application of this technology is known as "Exposure Notification." Developers were able to complete the creation and operation of this digital contact tracing system within a few weeks, and they made the code open-source to ensure that Apple and Android users worldwide could utilize it. (1)

18.
IEEE Transactions on Intelligent Transportation Systems ; : 1-10, 2022.
Article in English | Scopus | ID: covidwho-2019013

ABSTRACT

Multi-object tracking is of great importance in autonomous driving. However, with the outbreak of COVID-19, multi-object tracking faces new challenges in areas gripped by epidemics because of complex motion blur, frequent occlusions, and appearance deformations. To reliably improve object trajectory association in epidemic-plagued areas, we propose a temporal-spatial aggregation embedding network (TSAEN) for multi-object tracking. Our embedding network contains a temporal-aware correlation module (TACM) and spatial-aggregate embedding module (SAEM) that can fully obtain and aggregate appearance clues related to moving objects in previous frames. The TACM learns the temporal homogeneity features of the current and previous frames to perceive features with correlated appearance cues. Then, the SAEM adjusts the spatial deformation for each perceived temporal homogeneity feature and aggregates them for re-ID embedding learning. The experimental results demonstrate that our proposed method is able to achieve excellent overall performance. IEEE

19.
Concurrency and Computation: Practice and Experience ; 2022.
Article in English | Scopus | ID: covidwho-1958725

ABSTRACT

There is a growing need for next-generation science gateways to increase the accessibility of emerging large-scale datasets for data consumers (e.g., clinicians, researchers) who aim to combat COVID-19-related challenges. Such science gateways that enable access to distributed computing resources for large-scale data management need to be made more programmable, extensible, and scalable. In this article, we propose a novel socio-technical approach for developing a next-generation healthcare science gateway, namely, OnTimeEvidence that addresses data consumer challenges surrounding the COVID-19 pandemic related data analytics. OnTimeEvidence implements an intelligent agent, namely, Vidura Advisor that integrates an evidence-based filtering method to transform manual practices and improve scalability of data analytics. It also features a plug-in management middleware that improves the programmability and extensibility of the science gateway capabilities using microservices. Lastly, we present a usability study that shows the important factors from data consumers' perspective to adopt OnTimeEvidence with chatbot-assisted middleware support to increase their productivity and collaborations to access vast publication archives for rapid knowledge discovery tasks. © 2022 John Wiley & Sons, Ltd.

20.
Journal of Electronic Commerce Research ; 23(1), 2022.
Article in English | Scopus | ID: covidwho-1772360

ABSTRACT

The Covid-19 pandemic has dramatically changed social and economic life in almost all countries due to strict physical restrictions, such as social distancing and local or national lockdowns, required to promote public health and save lives. The policies implemented by most countries during each wave of the Covid-19 pandemic placed great pressure on global supply chains, bringing unprecedented challenges to international business (Mena et al., 2022), including cross-border e-commerce (Wang et al., 2021). Even with domestic markets, customers have changed consumption behaviors due to uncertainties of the pandemic and policies of quarantine. They are reducing their frequency of outdoor activities and preferring online shopping (Kawasaki et al., 2021). The Covid-19 pandemic has thus fueled the growth of e-commerce (Beckers et al., 2021), and forced traditional enterprises to rapidly convert from offline to online channels and respond with digital transformation of their business models to meet customer preferences (Amankwah-Amoah et al., 2021). Changing customer preferences and behaviors caused by the Covid-19 pandemic has been a catalyst for innovation in the platform economy (Chan & Gao, 2021) and financial technology (FinTech) (Chen et al., 2021). As consumers craved greater social presence during the Covid-19 pandemic, live streaming on social networking sites and e-commerce platforms became more popular. However, the pandemic has also negatively affected sharing economy and traditional industries such as the restaurant industry, tourism and retail. Obviously, the development of the digital economy, typified by e-commerce, faces unprecedented opportunities and challenges during the Covid-19 pandemic, presenting interesting research questions for the field. © 2022, Journal of Electronic Commerce Research. All rights reserved.

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