scholarly journals Effectiveness of the COVID-19 Contact-Confirming Application (COCOA) Based on Multi-Agent Simulation

2021 ◽  
Vol 25 (6) ◽  
pp. 931-943
Author(s):  
Yuto Omae ◽  
Jun Toyotani ◽  
Kazuyuki Hara ◽  
Yasuhiro Gon ◽  
Hirotaka Takahashi ◽  
...  
Keyword(s):  
Ministry Of Health ◽  
Usage Rate ◽  
The World ◽  
Agent Simulation ◽  
Multi Agent ◽  
Objective Value ◽  
Staying At Home ◽  
At Home

As of Aug. 2020, coronavirus disease 2019 (COVID-19) is still spreading in the world. In Japan, the Ministry of Health, Labour and Welfare developed “COVID-19 Contact-Confirming Application (COCOA),” which was released on June 19, 2020. By utilizing COCOA, users can know whether or not they had contact with infected persons. If those who had contact with infected individuals keep staying at home, they may not infect those outside. However, effectiveness decreasing the number of infected individuals depending on the app’s various usage parameters is not clear. If it is clear, we could set the objective value of the app’s usage parameters (e.g., the usage rate of the total populations) and call for installation of the app. Therefore, we develop a multi-agent simulator that can express COVID-19 spreading and usage of the apps, such as COCOA. In this study, we describe the simulator and the effectiveness of the app in various scenarios. The result obtained in this study supports those of previously conducted studies.

scholarly journals Stay-at-home policy: is it a case of exception fallacy? An internet-based ecological study

2020 ◽  
Author(s):  
Ricardo F. Savaris ◽  
Guilherme Pumi ◽  
Jovani Dalzochio ◽  
Rafael Kunst
Keyword(s):  
Linear Regression ◽  
Ecological Study ◽  
Dominant Role ◽  
Healthcare Access ◽  
Linear Regression Analysis ◽  
Study Data ◽  
The World ◽  
The Difference ◽  
Staying At Home ◽  
At Home

AbstractBackgroundCountries with strict lockdown had a spike on the number of deaths. A recent mathematical model has suggested that staying at home did not play a dominant role in reducing COVID-19 transmission. Comparison between number of deaths and social mobility is difficult due to the non-stationary nature of the COVID-19 data.ObjectiveTo propose a novel approach to assess the association between staying at home values and the reduction/increase in the number of deaths due to COVID-19 in several regions around the world.MethodsIn this ecological study, data from www.google.com/covid19/mobility/, ourworldindata.org and covid.saude.gov.br were combined. Countries with >100 deaths and with a Healthcare Access and Quality Index of ≥67 were included. Data were preprocessed and analyzed using the difference between number of deaths/million between 2 regions and the difference between the percentage of staying at home. Analysis was performed using linear regression and residual analysisResultsAfter preprocessing the data, 87 regions around the world were included, yielding 3,741 pairwise comparisons for linear regression analysis. Only 63 (1.6%) comparisons were significant.DiscussionWith our results, we were not able to explain if COVID-19 mortality is reduced by staying as home in ∼98% of the comparisons after epidemiological weeks 9 to 34.

scholarly journals How was the Mental Health of Colombian people on March during Pandemics Covid19?

2020 ◽  
Author(s):  
Josimar E. Chire Saire
Keyword(s):  
Public Health ◽  
Mental Health ◽  
Daily News ◽  
First Case ◽  
The World ◽  
Global Concern ◽  
Mining Algorithms ◽  
Use Of Internet ◽  
Staying At Home ◽  
At Home

Actual pandemic started with first cases in China and fast spread in Europe, Asia and the next continents became a global concern from March, so the most of countries ordered a lockdown to decrease infection rate forced people to stay at home. Meanwhile, the infection was growing around all the world, daily news usually show the number of cases per country and people increased the use of Internet to work trough videoconference tools and use of Social Networks to communicate what they think, feel about covid19 issue. In Colombia the first case was detected on March 6, the lockdwon was announced on March 20 and the first death on March 21. During all this time, people were evolving his concern about covid19 and staying at home slowly therefore this behaviour was changing over the time. The proposal of the paper is analyzed the behaviour of the population using Social Media and Text Mining algorithms. The results shows how the topic covid19 was increasing during the time, sleep patterns changed, and people were worried about fear to death, family travelling outside of Colombia and public health actions.

scholarly journals Impact of Social Networks on Diffusion of Products

2014 ◽  
Vol 5 (1) ◽  
pp. 35-50
Author(s):  
Yudai Arai ◽  
Tomoko Kajiyama ◽  
Noritomo Ouchi
Keyword(s):  
Social Networks ◽  
Consumer Behaviour ◽  
Advertising Budget ◽  
The World ◽  
Agent Simulation ◽  
Multi Agent ◽  
Simulation Results ◽  
The Difference ◽  
Using Data ◽  
The Impact

In light of the rapid growth of social networks around the world, this study analyses the impact of social networks on the diffusion of products and demonstrates the effective way to diffuse products in the society where social networks play an important role. We construct a consumer behaviour model by multi-agent simulation taking the movie market as an example. After validating it by using data from 13 US movies, we conduct simulations. Our simulation results show that the impact of social networks on the diffusion differs according to the customers’ expectations and evaluation for a movie. We also demonstrate the effective weekly advertising budget allocations corresponding to the types of movies. We find that the difference of weekly advertising budget allocations gives greater impact on the diffusion with the growth of social networks. This paper provides firm’s managers with important suggestions for diffusion strategy considering the impact of social networks.

scholarly journals CHILDHOOD MOOD DISORDERS DURING PANDEMIC; LEARNING MANAGEMENT BASED ON SELF DISCIPLINE

2020 ◽  
Vol 2 (3) ◽  
pp. 331-344
Author(s):  
Akmal Mundiri ◽  
Chodijatus Sholehah
Keyword(s):  
Qualitative Research ◽  
Early Childhood ◽  
Mood Disorders ◽  
Case Studies ◽  
Human Activities ◽  
Working At Home ◽  
The World ◽  
The Government ◽  
Staying At Home ◽  
At Home

This paper describes the management of early childhood mood in the midst of the COVID-19 pandemic through qualitative research approaches and types of case studies. Covid’s-19 pandemic that hit the world has changed most of human activities. This pandemic anables everyone to do their own work by staying at home, studying at home and working at home. It was requested that the government had appealed. This research aims to learn how to regulate early childhood moods so that they can be disciplined in the midst of this pandemic. There are several methods that can be used, use the exemplary method, habitation, and discuss individuals. Besides that, there are other things that can also be done, such a giving awards to children who have met the specified discipline standards, for example, providing additional play time. And give punishment the sentence consist of no award received, not with punches, screams or twists.

scholarly journals State Policies Decrease Movement During COVID-19

Contexts ◽  
2020 ◽  
Vol 19 (4) ◽  
pp. 51-55
Author(s):  
A H M Belayeth Hussain
Keyword(s):  
World Health Organization ◽  
State Policies ◽  
World Health ◽  
Social Distancing ◽  
The World ◽  
Health Organization ◽  
Staying At Home ◽  
At Home

“Amid the COVID-19 pandemic, ‘social distancing’ and ‘stay-at-home’ have become two of the most pushed recommendations from the World Health Organization (WHO) and governments across countries. This paper presents exploratory graphs and analyses to show the relationships among the governments' initiatives during the coronavirus pandemic and people’s responses to keep them staying at home.”

scholarly journals Stay-at-home policy is a case of exception fallacy: an internet-based ecological study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
R. F. Savaris ◽  
G. Pumi ◽  
J. Dalzochio ◽  
R. Kunst
Keyword(s):  
Linear Regression ◽  
Ecological Study ◽  
Dominant Role ◽  
Healthcare Access ◽  
Linear Regression Analysis ◽  
Study Data ◽  
The World ◽  
The Difference ◽  
Staying At Home ◽  
At Home

AbstractA recent mathematical model has suggested that staying at home did not play a dominant role in reducing COVID-19 transmission. The second wave of cases in Europe, in regions that were considered as COVID-19 controlled, may raise some concerns. Our objective was to assess the association between staying at home (%) and the reduction/increase in the number of deaths due to COVID-19 in several regions in the world. In this ecological study, data from www.google.com/covid19/mobility/, ourworldindata.org and covid.saude.gov.br were combined. Countries with > 100 deaths and with a Healthcare Access and Quality Index of ≥ 67 were included. Data were preprocessed and analyzed using the difference between number of deaths/million between 2 regions and the difference between the percentage of staying at home. The analysis was performed using linear regression with special attention to residual analysis. After preprocessing the data, 87 regions around the world were included, yielding 3741 pairwise comparisons for linear regression analysis. Only 63 (1.6%) comparisons were significant. With our results, we were not able to explain if COVID-19 mortality is reduced by staying at home in ~ 98% of the comparisons after epidemiological weeks 9 to 34.

scholarly journals Hydroxychloroquine for the Treatment of COVID-19: Evidence, Possible Mode of Action and Industrial Supply of the Drug

2020 ◽  
Author(s):  
Mario Pagliaro ◽  
Francesco Meneguzzo
Keyword(s):  
Mode Of Action ◽  
Early Phase ◽  
Scale Up ◽  
Modes Of Action ◽  
The World ◽  
Staying At Home ◽  
At Home

Hydroxychloroquine, a known antiviral metabolite of chloroquine, is increasingly used along with antibiotic azithromycin for the treatment of COVID-19 infection. In about one month India, the world’s largest manufacturer, delivered hydroxychloroquine for treating COVID-19 to over 50 countries. The therapy is being used across the world both for patients staying at home at the early phase of symptoms, as well as for patients hospitalized. We summarize achievements as of late April 2020, review possible modes of action and suggest avenues for the quick scale-up of production of hydroxychloroquine.

scholarly journals Multi-Agent Simulation of Iceberg Mass Loss during Its Energy-Efficient Towing for Freshwater Supply

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 4031
Author(s):  
Sergiy Filin ◽  
Iouri Semenov ◽  
Ludmiła Filina-Dawidowicz
Keyword(s):  
Mass Loss ◽  
Energy Efficient ◽  
Melting Rate ◽  
Transport Time ◽  
Transport Efficiency ◽  
Mass Losses ◽  
The World ◽  
Agent Simulation ◽  
Multi Agent ◽  
Towing Speed

The problem of freshwater deficit in the last decade has progressed, not only in Africa or Asia, but also in European countries. One of the possible solutions is to obtain freshwater from drifting icebergs. The towing of large icebergs is the topic analyzed in various freshwater supply projects conducted in different zone-specific regions of the world. These projects show general effects of iceberg transport efficiency but do not present a detailed methodology for the calculation of their mass losses. The aim of this article is to develop the methodology to calculate the mass losses of icebergs transported on a selected route. A multi-agent simulation was used, and the numerical model to estimate the melting rate of the iceberg during its energy-efficient towing was developed. Moreover, the effect of towing speed on the iceberg’s mass loss was determined. It was stated that the maximum use of ocean currents, despite longer route and increased transport time, allows for energy-efficient transport of the iceberg. The optimal towing speed of the iceberg on the selected route was recommended at the range of 0.4–1 m/s. The achieved results may be of interest to institutions responsible for sustainable development and dealing with water resources and freshwater supply.

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