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1.
Journal of Pharmaceutical Negative Results ; 13(3):823-829, 2022.
Article in English | EMBASE | ID: covidwho-2164809

ABSTRACT

This paper tried to explore the view of religious and non-religious people on severity of coronavirus disease 2019 in South Korea. Authors employs a survey method to investigate if religious people in South Korea have different opinions about the risk and dangers of coronavirus disease 2019 compared to non-religious people. The samples for this research were collected via Google Form and paper-pencil based from the university students of Korea. Correlation coefficient tests was performed and the difference-of-means t-test to see if there was a significant correlation between religiosity and the belief that the coronavirus is dangerous. The results showed that is no strong evidence to support our hypothesis. Copyright © 2022 Wolters Kluwer Medknow Publications. All rights reserved.

2.
European Psychiatry ; 65(Supplement 1):S141, 2022.
Article in English | EMBASE | ID: covidwho-2162459

ABSTRACT

Introduction: Coronavirus Disease 2019 has prompted widespread school closures and physical distancing measures. Concerns regarding COVID-19 school closures often increase stress levels in parents. Objective(s): This study examined whether higher levels of parental concerns were associated with children's problematic behaviors and other factors during COVID-19-related primary school closures. Method(s): Participants were 217 parents who responded to a webbased questionnaire covering parental concerns, subjective stress, and depression;children's sleep patterns, behavioral problems, and changes in activity level after COVID-19;previously received mental health services;and media usage during the online-only class period from community center in Suwon city. Result(s): The number of parental concerns was associated with children's behavioral problem index (BPI) score (Pearson correlation 0.211, p < 0.01), sleep problems (0.183, p < 0.01), increased smartphone usage (0.166, p < 0.05), increased TV usage (0.187, p < 0.01), parents' subjective stress levels (0.168, p < 0.05), and parental depression (0.200, p < 0.01). In families with children who previously received mental health services, the children reportedly suffered from more sleep and behavioral problems but not increased media usage, and parents noted more stress and depression. Parental concerns are related to family factors such as change of caregiver, no available caregiver, decreased household income, and recent adverse life events. Economically vulnerable people also reported higher rates of reported caregiver burden during COVID-19-related primary school closures, thus will require the potential heightened mental health needs. Conclusion(s): Ongoing monitoring of mental health at risky group and multiple support systems should be considered for parents having difficulty in caring their children.

4.
Journal of Pharmaceutical Negative Results ; 13(3):823-829, 2022.
Article in English | Web of Science | ID: covidwho-2156308

ABSTRACT

This paper tried to explore the view of religious and non-religious people on severity of coronavirus disease 2019 in South Korea. Authors employs a survey method to investigate if religious people in South Korea have different opinions about the risk and dangers of coronavirus disease 2019 compared to non-religious people. The samples for this research were collected via Google Form and paper-pencil based from the university students of Korea. Correlation coefficient tests was performed and the difference-of-means t-test to see if there was a significant correlation between religiosity and the belief that the coronavirus is dangerous. The results showed that is no strong evidence to support our hypothesis.

5.
J Chest Surg ; 2022.
Article in English | PubMed | ID: covidwho-2155636

ABSTRACT

BACKGROUND: Coronavirus disease 2019 (COVID-19) has been found to cause life-threatening respiratory failure, which can progress to irreversible lung damage. Lung transplantation can be a life-saving treatment in patients with terminal lung disease (e.g., acute respiratory distress syndrome caused by infection). This study aimed to present the clinical course and results after initial lung transplantation in patients with severe COVID-19 who did not recover even with optimal medical care. METHODS: From August 2019 to February 2022, this study enrolled 10 patients with COVID-19 (5 men;median age, 55.7 years) who underwent lung transplantation at a single center in Korea. All patients' characteristics, clinical pathway, overall survival, complications, and operative data were collected and analyzed. RESULTS: Veno-venous extracorporeal membrane oxygenation or an oxygenator in a right ventricular assist device circuit was applied to 90% of the patients, and the median length of extracorporeal life support before operation was 48.5 days. There were no cases of mortality after a median follow-up of 372.8 days (interquartile range, 262.25-489 days). The major complications included the requirement for postoperative extracorporeal membrane oxygenation support in 2 cases (20%), re-transplantation in 1 case (10%), and re-exploration due to bleeding in 2 cases (20%). During the follow-up period, 3 out of 10 patients died. CONCLUSION: Excellent early outcomes were observed for patients who underwent lung transplantation. Thus, lung transplantation can be an effective and feasible treatment for patients with end-stage lung disease caused by COVID-19.

6.
BMC Research Notes ; 15(1):357, 2022.
Article in English | MEDLINE | ID: covidwho-2153662

ABSTRACT

OBJECTIVE: We evaluated the sensitivity and specificity of the Panbio TM COVID-19 Ag rapid test device using nasal swabs and those of the SSf-COVID19 kit, one of RT-PCR tests, using saliva specimens. These tests were compared with RT-PCR tests using nasopharyngeal swabs for the diagnosis of SARS-CoV-2 infection. The three diagnostic tests were simultaneously conducted for patients aged >= 18 years, who were about to be hospitalized or had been admitted for COVID-19 confirmed by RT-PCR in two research hospitals from August 20 to October 29, 2021. Nasal swabs were tested using the Panbio TM COVID-19 Ag rapid test device. More than 1 mL of saliva was self-collected and tested using the SSf-COVID19 kit.

7.
2022 Ieee/Cvf Conference on Computer Vision and Pattern Recognition Workshops (Cvprw 2022) ; : 2103-2112, 2022.
Article in English | Web of Science | ID: covidwho-2152447

ABSTRACT

The importance of online education has been brought to the forefront due to COVID. Understanding students' attentional states are crucial for lecturers, but this could be more difficult in online settings than in physical classrooms. Existing methods that gauge online students' attention status typically require specialized sensors such as eye-trackers and thus are not easily deployable to every student in real-world settings. To tackle this problem, we utilize facial video from student webcams for attention state prediction in online lectures. We conduct an experiment in the wild with 37 participants, resulting in a dataset consisting of 15 hours of lecture-taking students' facial recordings with corresponding 1,100 attentional state probings. We present PAFE (Predicting Attention with Facial Expression), a facial-video-based framework for attentional state prediction that focuses on the vision-based representation of traditional physiological mind-wandering features related to partial drowsiness, emotion, and gaze. Our model only requires a single camera and outperforms gaze-only baselines.

8.
Open Forum Infect Dis ; 9(11), 2022.
Article in English | PubMed Central | ID: covidwho-2152126

ABSTRACT

Background: Identifying the source of healthcare personnel (HCP) coronavirus disease 2019 (COVID-19) is important to guide occupational safety efforts. We used a combined whole genome sequencing (WGS) and epidemiologic approach to investigate the source of HCP COVID-19 at a tertiary-care center early in the COVID-19 pandemic. Methods: Remnant nasopharyngeal swab samples from HCP and patients with polymerase chain reaction–proven COVID-19 from a period with complete sample retention (14 March 2020 to 10 April 2020) at Rush University Medical Center in Chicago, Illinois, underwent viral RNA extraction and WGS. Genomes with >90% coverage underwent cluster detection using a 2 single-nucleotide variant genetic distance cutoff. Genomic clusters were evaluated for epidemiologic linkages, with strong linkages defined by evidence of time/location overlap. Results: We analyzed 1031 sequences, identifying 49 clusters that included ≥1 HCP (265 patients, 115 HCP). Most HCP infections were not healthcare associated (88/115 [76.5%]). We did not identify any strong epidemiologic linkages for patient-to-HCP transmission. Thirteen HCP cases (11.3%) were attributed to a potential patient source (weak evidence involving nonclinical staff that lacked location data to prove or disprove contact with patients in same cluster). Fourteen HCP cases (12.2%) were attributed to HCP source (11 with strong evidence). Conclusions: Using genomic and epidemiologic data, we found that most HCP severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections were not healthcare associated. We did not find strong evidence of patient-to-HCP transmission of SARS-CoV-2.

9.
1st ACIS International Symposium on Emotional Artificial Intelligence and Metaverse, EAIM 2022 ; 1067:183-197, 2023.
Article in English | Scopus | ID: covidwho-2148560

ABSTRACT

The COVID-19 pandemic has made most MICE (an acronym that stands for Meeting, Incentive travel, Convention and Exhibition) events postponed or canceled but some are held as online and virtual, or as hybrid events combining online and offline format. In recent years, evolved from the physical MICE events, metaverse-based MICE events are spot-lighted as the participants can indirectly participates in the virtual world called metaverse through avatars, the virtual self. As various metaverse contents are developed based on advanced technology, the MZ (millennials and Generation Z) generation, who proficiently handle digital platforms, accepts the virtual world as a part of reality, and enjoys new experiences (Hwang, Media Issue Trend 45:6–15, [3]). The purpose of this study is to investigate which factors of the metaverse-based MICE events affect the participants’ loyalty and intention to attend the MICE events and provide empirical data for establishing an effective metaverse-based MICE marketing strategy. To do that this study adopted SPICE(Seamlessness, Presence, Interoperability, Concurrence, Economy) model of metaverse suggested by Kim and Shin (S.K. Kim, B.H. Shin, Metaverse new opportunity. Vegabooks (2021)). A total of valid responses collected from MICE industry stakeholders were investigated. The findings of this study identified that among five dimensions of SPICE model, Seamlessness, Presence, and Economy factors have statistically significant influence on participants’ loyalty of the event while only Presence and Economy factors have significant influence on intention to attend the event. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

10.
Journal of the American Society of Nephrology ; 33:309, 2022.
Article in English | EMBASE | ID: covidwho-2125274

ABSTRACT

Background: The recent novel coronavirus disease (COVID-19) pandemic has led to restrictions in physical activity. We evaluated the impact of risk perception on physical activity, and its impact on kidney function in chronic kidney disease (CKD) patients during the pandemic. Method(s): A population of CKD patients registered in a SKETCH (Study on Kidney disease and EnvironmenTal Chemicals, Clinical Trial No. NCT04679168) cohort recruited from June 2020 to October 2020 was included in the study. Patients were followed-up every 3 months for a year. We obtained risk perception and physical activity information by a questionnaire survey. Physical exercise, 3-times/week, was categorized into three groups according to the frequency of positive response during 5 visits: group 1, 0-2;group 2, 3-4;group 3, 5. We used Logistic regression analysis to identify the significance of risk perception to physical activity. The cox-proportional hazard model was used to identify the significance of physical activity for kidney function. Result(s): A total of 262 patients were included, and the mean age was 60.5+/-12.8 years old. Mean eGFR was 43.4+/-20.9 mL/min/1.73 m2, and there were 220 (84.0%) with eGFR <60 mL/min/1.73m2. There were 122 (46.6%) of patients who showed higher risk perception for COVID-19 infection. After adjustment with age, sex, comorbidities, and laboratory results, higher risk perception was significantly associated with decreased physical activity (adjusted OR 0.44, 95% CI, 0.23, 0.84). During 364.8+/-38.6 days, 52 (19.8%) patients showed decreased kidney function with decreasing eGFR >=30%. Group 1 showed a significantly increased risk for kidney dysfunction (adjusted HR 3.36, 95% CI 1.23, 9.20). This result was prominent in age over 60, male sex, patients with hypertension. Conclusion(s): Decreased physical activity related to higher risk-perception, and that was significantly increased risk for kidney dysfunction. Healthcare provider needs to consider a new strategy to encourage physical activity irrespective of risk perception.

11.
Journal of the American Society of Nephrology ; 33:332-333, 2022.
Article in English | EMBASE | ID: covidwho-2125273

ABSTRACT

Background: Low total CO2 (tCO2) levels are significantly associated with allcause mortality. Lots of factors are related to the poor prognosis of COVID-19, it was a lack of data to evaluate the impact of tCO2. We evaluated the impact of metabolic acidosis on all-cause mortality in patients with COVID-19. Method(s): We retrospectively reviewed the data from two independent hospitals that care for admitted patients with COVID-19 between February 2020 and September 2021. We excluded subjects with underlying end-stage kidney disease, no data of tCO2 value, and age under 18 years old. The primary outcome was in-hospital mortality. We evaluate the impact of tCO2 as a continuous variable on mortality using the Cox-proportional hazard model. In addition, we tried to find the relative value of tCO2 to increase the risk of mortality using a generalized additive model. We also evaluated the impact of such a value of tCO2 and 22mEq/L of tCO2 on mortality. Result(s): A total of 4,423 patients were included, and the mean age was 54.7+/-18.3 years old. Mean tCO2 was 26.2+/-3.6 mEq/L, and there were 792 (17.9%) with tCO2 <22 mEq/L. Increased in 1 mEq/L of tCO2 significantly decreased risk for all-cause mortality after adjustment with age, sex, history of hypertension, diabetes, and laboratory results such as serum white blood count, hemoglobin, platelet, calcium, phosphate, albumin, and eGFR (adjusted HR 0.95, 95% CI 0.91, 0.99). We found that the level of 24 mEq/L of tCO2 as a cut-off value to increase risk of mortality. In the Cox-proportional hazard model, the risk of all-cause mortality was significantly increased by around 1.6 times in subjects with lower tCO2 irrespective of the cut-off value of 22 or 24 mEq/L. Conclusion(s): Decreased tCO2 significantly increased the risk of all-cause mortality in patients with COVID-19. Monitoring of tCO2 could be a good indicator to predict prognosis, and it needs to be considered to encourage in patients with a specific condition.

12.
Clinical and Experimental Vaccine Research ; 11(3):285-289, 2022.
Article in English | EMBASE | ID: covidwho-2145131

ABSTRACT

Various vaccines have been developed to fight severe acute respiratory syndrome coro-navirus 2 (SARS-CoV-2), the virus responsible for the coronavirus disease 2019 pandemic. However, new variants of SARS-CoV-2 undermine the effort to fight SARS-CoV-2. Here, we produced S proteins harboring the receptor-binding domain (RBD) of the Omicron variant in plants. Plant-produced S proteins together with adjuvant CIA09A triggered strong immune responses in mice. Antibodies in serum inhibited interaction of recombinant human angiotensin-converting enzyme 2 with RBD of the Omicron variant, but not RBD of other variants. These results suggest that antibodies induced by RBD of the Omicron variant are highly specific for the Omicron RBD, but not for that of other variants. Copyright © Korean Vaccine Society.

13.
7th International Conference on Platform Technology and Service, PlatCon 2022 ; : 53-58, 2022.
Article in English | Scopus | ID: covidwho-2136455

ABSTRACT

Contact tracing is an effective strategy to slow down the COVID-19 pandemic. However, the use of digital footprints as supportive evidences in the contact tracing process rises the privacy problems since private information must be shared to the contact tracing providers. This paper proposed a novel privacy-preserving contact tracing procedure based on zero-knowledge-range-proof and blockchain platform, which helps users to prove whether they in contact with the confirmed patient without disclosing the exact location they have visited. The blockchain is used to guarantee anonymity through the use of address as an identity, and provide strong non-repudiation from transactions. Finally, we provide a proof-of-concept implementation of our proposal using Hyperledger Fabric and smartphone application. The evaluation showed that the proposed system can work as intended with minimal processing delay. © 2022 IEEE.

14.
Annals of Medicine ; 54(1):2998-3006, 2022.
Article in English | MEDLINE | ID: covidwho-2134153

ABSTRACT

BACKGROUND: Limited data are available in COVID-19 patients on the prediction of treatment response to systemic corticosteroid therapy based on systemic inflammatory markers. There is a concern whether the response to systemic corticosteroid is different according to white blood cell (WBC) counts in COVID-19 patients. We aimed to assess whether WBC count is related with the clinical outcomes after treatment with systemic corticosteroids in severe COVID-19.

15.
Annals of Oncology ; 33(Supplement 9):S1459-S1460, 2022.
Article in English | EMBASE | ID: covidwho-2129907

ABSTRACT

Background: In an interim analysis of Asian pts with uHCC in the observational REFINE study of regorafenib (NCT03289273), treatment-emergent adverse events (TEAEs) were consistent with those reported in the global, phase 3 RESORCE trial. Here, we present the final analysis of Asian pts with uHCC in REFINE. Method(s): REFINE is an international, prospective, multicenter study that enrolled pts with uHCC for whom a decision to treat with regorafenib was made by the treating physician prior to enrollment, according to the local health authority approved label. The primary objective is safety, including the incidences of TEAEs and dose modifications due to TEAEs (NCI-CTCAE v4.03). Secondary endpoints include overall survival, progression-free survival, and treatment duration. Result(s): Of the 1005 evaluable pts, 557 (55%) were from Asia (Korea [31%], Japan [26%], Taiwan [24%], China [18%], Thailand [1%]) and 82% were male. At baseline, median age was 65 years (range 21-94) and the most common HCC etiology in Asian pts was hepatitis B (60%) and in non-Asian pts was alcohol use (36%;Table). More Asian pts (71%) had received prior transarterial chemoembolization vs non-Asian pts (42%). The initial daily regorafenib dose was 160/120/80/40 mg in 51%/12%/35%/3% of Asian pts and 42%/9%/45%/4% of non-Asian pts. The median treatment duration was 3.7 months (range 0-34.4) in Asian pts and 3.6 months (range 0-38.9) in non-Asian pts. The most common TEAEs in Asian pts were hand-foot skin reaction (40%), diarrhea (27%), and decreased appetite (17%). TEAEs led to dose modification in 44% of Asian pts. [Formula presented]. Conclusion(s): These final data from REFINE confirm the safety and effectiveness of regorafenib in Asian pts with uHCC from a broad population in real-world practice. Final analyses from REFINE are ongoing and will be presented at the conference. Clinical trial identification: NCT03289273. Editorial acknowledgement: Editorial assistance in the preparation of this manuscript was provided by Matthew Reynolds of OPEN Health Communications (London, UK), with financial support from Bayer. Legal entity responsible for the study: Bayer. Funding(s): Bayer. Disclosure: Y.J. Kim: Financial Interests, Personal, Advisory Role: Bayer, Bristol Myers Squibb, Samil, PharmaKing, Celltrion, Bukwang;Financial Interests, Personal, Invited Speaker: Roche, AbbVie, Eisai, Ipsen, Boston Scientific, Bristol Myers Squibb, BTG, Bayer, MSD, Gilead Sciences, Novo Nordisk, Green Cross Cell, Boehringer Ingelheim, AstraZeneca;Financial Interests, Personal, Funding: BTG, Bayer, Boston Scientific, AstraZeneca, Gilead Sciences, Samjin, BL&H. M. Kurosaki: Financial Interests, Personal, Speaker's Bureau: Gilead Sciences, AbbVie, Eisai, Chugai, Lilly, Takeda. H.Y. Lim: Financial Interests, Personal, Advisory Role: Bayer, Eisai, Roche, Ipsen. M. Ikeda: Financial Interests, Personal, Advisory Board: AstraZeneca, Chugai, Eli Lilly Japan, Eisai, Nihon Servier, Novartis, Ono, Takeda, GlaxoSmithKline;Financial Interests, Personal, Invited Speaker: AstraZeneca, Bayer, Bristol Myers Squibb, Chugai, Eli Lilly Japan, Eisai, Nihon Servier, Novartis, Taiho, Yakult, Teijin Pharma, AbbVie, Abbott Japan, Fujifilm Toyama Chemical, Incyte Biosciences Japan, ASLAN, Chugai, Nihon Servier, Takeda;Financial Interests, Institutional, Invited Speaker: Bayer, Bristol Myers Squibb, Eisai, AstraZeneca, Eli Lilly Japan, Chugai Pharmaceutical, Merck Serono, MSD, Ono, Yakult, Novartis, Takeda, J-Pharma, Pfizer, Chiome Bioscience, Nihon Servier, Delta-Fly Pharma, Syneos Health, Merus.N.V. M. Kudo: Financial Interests, Personal, Invited Speaker: Eisai, Chugai, Eli Liiy, Bayer, Takeda, MSD;Financial Interests, Institutional, Research Grant: Otsuka, Sumitomo Dainippon Pharma, EA Pharma, Taiho, Eisai, AbbVie, Gilead Sciences, Takeda, GE Healthcare, Chugai. Y. Huang: Financial Interests, Personal, Advisory Role: Eisai, Bayer, BMS, Ono, Gilead, Lilly, AbbVie, Roche;Financial Interests, Personal, Invited Speaker: Eisai, Bayer, BMS, Ono, Gilead, Lilly, AbbVie, Roche;Financial Inte ests, Personal, Speaker's Bureau: Eisai, Bayer, BMS, Ono, Gilead, Lilly, AbbVie, Roche;Financial Interests, Institutional, Funding: Gilead. N. Kato: Financial Interests, Personal, Invited Speaker: Gilead Sciences Inc., AbbVie G.K., Ohtsuka Pharmaceutical Co., Ltd., Bayer Yakuhin Ltd., Chugai Pharmaceutical Co., Ltd., AstraZeneca K.K., Sumitomo Dainippon Pharma Co., Ltd., Takeda Pharmaceutical Co., Ltd., Zeria Pharmaceutical Co., Ltd., Olympus Corporation, Eisai Co., Ltd., Aska Pharmaceutical Co., Ltd., Tsumura & Co., Mochida Pharmaceutical Co., Ltd., Miyarisan Pharmaceutical Co., Ltd., Covidien Japan Inc., Eli Lilly Japan K.K., Nobelpharma Co., Ltd., Kowa Company, Ltd., Incyte Biosciences Japan GK, Yakult Honsha Co.,Ltd., Olympus Marketing, Inc., Taisho Pharmaceutical Co.,Ltd., Janssen Pharmaceutical K.K.;Financial Interests, Institutional, Research Grant: AbbVie G.K., Ohtsuka Pharmaceutical Co., Ltd., Bayer Yakuhin Ltd., Chugai Pharmaceutical Co., Ltd., Mitsubishi Tanabe Pharma Corporation, Sumitomo Dainippon Pharma Co., Ltd., Shionogi & Co., Ltd., Eisai Co., Ltd., Tsumura & Co., Nippon Kayaku Co., Ltd., JIMRO Co., Ltd., Kowa Company, Ltd. C. Hsu: Financial Interests, Personal, Speaker's Bureau: Bristol Myers Squibb, Ono Pharmaceutical, Merck Sharp & Dohme, Roche, Eisai;Financial Interests, Institutional, Funding: Ono Pharmaceutical, AstraZeneca, MSD, Merck Serono, Taiho Pharmaceutical, Bristol Myers Squibb, BeiGene, NuCana BioMed, Johnson & Johnson, Roche/Genentech, BeiGene;Financial Interests, Personal, Advisory Role: Ono Pharmaceutical, MSD, Bristol Myers Squibb, Merck Serono, Roche/Genentech. B. Chewaskulyong: Financial Interests, Personal, Advisory Role: Pfizer, STADA;Financial Interests, Personal, Invited Speaker: AstraZeneca, Pfizer, DKSH, Janssen, BMS, MSD, Roche, TAIHO;Financial Interests, Personal, Speaker's Bureau: AstraZeneca, Pfizer, DKSH, Janssen, BMS, MSD, Roche, TAIHO;Financial Interests, Institutional, Funding: Bayer. J. Khan: Financial Interests, Institutional, Full or part-time Employment: Bayer. K. Ozgurdal: Financial Interests, Institutional, Full or part-time Employment: Bayer;Financial Interests, Personal, Stocks/Shares: Bayer. All other authors have declared no conflicts of interest. Copyright © 2022

16.
Nucleic Acids Res ; 2022 Nov 09.
Article in English | MEDLINE | ID: covidwho-2107542

ABSTRACT

GenBank® (https://www.ncbi.nlm.nih.gov/genbank/) is a comprehensive, public database that contains 19.6 trillion base pairs from over 2.9 billion nucleotide sequences for 504 000 formally described species. Daily data exchange with the European Nucleotide Archive (ENA) and the DNA Data Bank of Japan (DDBJ) ensures worldwide coverage. Recent updates include resources for data from the SARS-CoV-2 virus, NCBI Datasets, BLAST ClusteredNR, the Submission Portal, table2asn, a Foreign Contamination Screening tool and BioSample.

17.
Infrared Sensors, Devices, and Applications Xii ; 12234, 2022.
Article in English | Web of Science | ID: covidwho-2108174

ABSTRACT

For chalcogenide-based infrared glass materials, the need was emphasized along with the spread of thermal imaging cameras in COVID 19 environment. Commercial Ge-As-Se glass system exhibits a dispersion value of 100 similar to 180 and a refractive index of 2.5 or more, and is suitable for the glass molding process, so it is used as an aspherical infrared lens for various thermal imaging cameras. However, some compositions are not suitable for glass molding process. In this study, the composition of the long wavelength infrared glass melting was designed based on the Ge-As-Se system with a Ge composition range of 0 similar to 35 at%, As composition range of 20 similar to 40 at%, and Se composition range of 25 similar to 60 at%. As a result of XRD analysis for each Ge-As-Se-based composition, it was confirmed that all amorphous grains were obtained in the developed composition area. For the Ge-As-Se glass-forming composition region, the glass transition temperature ranged from 180 to 425 degrees C. The refractive index was measured using the prism method in the 3 to 12 mu m wavelength band. The refractive index (lambda=10 mu m) of Ge5As40Se55 and Ge5As35Se60 was 2.6913 and 2.6538, respectively. Moldability test was performed using a glass molding press. As a result of observing whether the lens has internal defects and microcracks after molding, it was confirmed that there was no abnormality and that it was suitable for glass molding process.

18.
International Review for Spatial Planning and Sustainable Development ; 10(4):112-129, 2022.
Article in English | Scopus | ID: covidwho-2100447

ABSTRACT

Though the activities in urban facilities have declined during the COVID-19, the demand for visiting open spaces and parks has increased. Visitors to city parks also increased in Seoul. People have realized that nature is an important space for safety, health, and leisure in their everyday life. This study implied that people intended to visit city parks as a natural space in the urban area. So, an assessment criterion of the quality of environments of city parks, naturalness is selected as one of the indicators. This study chose six parks as a study subject in Seoul and found differences for users in the perception of naturalness in city parks. Q methodology is a useful tool to identify differences between individual's perceptions of nature. Through the Q analysis, six groups have differences in the perception and the valuation of naturalness. The study found that differences have resulted from their past experiences, personal preferences, and psychological status. The first group can be named a dynamic type who enjoys various landscapes, and the second is the group of people who love to meditate in serene woodlands. The third group wants to observe the animals and consider the ecosystem as important, and the fourth group is those who love to feel the changing seasons with sensitivity. The fifth group recognizes nature through the contrast between the building and the natural environment in the city. The last group is those who pursue conservation for old trees or the existing nature environment itself. As a general, appraisal of perceived naturalness is subjective and individual. The perception of naturalness influences landscape preferences and attitudes to city parks. Therefore, the naturalness perceived by users should be a crucial consideration to maximize park services so that users can appreciate various tastes © This open access article is published under a Creative Commons [Attribution-NonCommercial-NoDerivatives 4.0 International] license. https://creativecommons.org/licenses/by-nc-nd/4.0/

19.
Optics Education and Outreach Vii ; 12213, 2022.
Article in English | Web of Science | ID: covidwho-2097886

ABSTRACT

A comprehensive education of optical engineers is of paramount importance to the development of the industry. While optical sciences and engineering curricula are set up to teach theoretical concepts comprehensively, there appears to be a lack of required coursework that teaches students how to use industry-standard software that they will inevitably use in their careers. The Practical Optics Workshop (POW) is an initiative at the University of Arizona's Wyant College of Optical Sciences to support the education of students that use optical design software. POW's aim is to bridge the gap between the theory of optical system design and the problems the optical engineers of the future will face daily. POW has principally engaged students through short workshop sessions and optical design problems through inquiry-based learning activities. However, during the COVID-19 pandemic new activities have been designed to support self-paced and virtual learning to ensure the accessibility of Optical Design software education. We present the status of POW's current initiatives and how they have impacted student learning, as well as the design of future initiatives that POW is developing for a self-paced curriculum.

20.
Computers, Materials and Continua ; 74(1):1561-1574, 2023.
Article in English | Scopus | ID: covidwho-2091626

ABSTRACT

COVID-19 is a contagious disease and its several variants put under stress in all walks of life and economy as well. Early diagnosis of the virus is a crucial task to prevent the spread of the virus as it is a threat to life in the whole world. However, with the advancement of technology, the Internet of Things (IoT) and social IoT (SIoT), the versatile data produced by smart devices helped a lot in overcoming this lethal disease. Data mining is a technique that could be used for extracting useful information from massive data. In this study, we used five supervised ML strategies for creating a model to analyze and forecast the existence of COVID-19 using the Kaggle dataset” COVID-19 Symptoms and Presence.” RapidMiner Studio ML software was used to apply the Decision Tree (DT), Random Forest (RF), K-Nearest Neighbors (K-NNs) and Naive Bayes (NB), Integrated Decision Tree (ID3) algorithms. To develop the model, the performance of each model was tested using 10-fold cross-validation and compared to major accuracy measures, Cohan’s kappa statistics, properly or mistakenly categorized cases and root means square error. The results demonstrate that DT outperforms other methods, with an accuracy of 98.42% and a root mean square error of 0.11. In the future, a devised model will be highly recommendable and supportive for early prediction/diagnosis of disease by providing different data sets. © 2023 Tech Science Press. All rights reserved.

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