scholarly journals Modeling Simulation of COVID-19 in Indonesia based on Early Endemic Data

2020 ◽  
Vol 3 (1) ◽  
pp. 1-8
Author(s):  
Nuning Nuraini ◽  
Kamal Khairudin ◽  
Mochamad Apri
Keyword(s):  
Parameter Estimation ◽  
Simple Model ◽  
South Korea ◽  
Logistic Equation ◽  
Infected People ◽  
Modeling Simulation ◽  
The World ◽  
Drastic Increase ◽  
S Curve ◽  
Parameter Values

The COVID-19 pandemic has recently caused so much anxiety and speculation around the world. This phenomenon was mainly driven by the drastic increase in the number of infected people with the COVID-19 virus worldwide. Here we propose a simple model to predict the endemic in Indonesia. The model is based on the Richard’s Curve that represents a modified logistic equation. Based on the similar trends of initial data between Indonesia and South Korea, we use parameter values that are obtained through parameter estimation of the model to the data in South Korea. Further, we use a strict assumption that the implemented strategy in Indonesia is as effective as in South Korea. The results show that endemic will end in April 2020 with the total number of cases more than 8000.

The Irresistible Rise of Asian Cinema 1

1994 ◽  
Author(s):  
Gerald Pratley
Keyword(s):  
Hong Kong ◽  
South Korea ◽  
Motion Pictures ◽  
The Philippines ◽  
New Wave ◽  
World Today ◽  
The World ◽  
Production Activity ◽  
Exciting Development ◽  
Asian Cinema

PRODUCTION ACTIVITY It was not so many years ago it seems when speaking of motion pictures from Asia meant Japanese films as represented by Akira Kurosawa and films from India made by Satyajit Ray. But suddenly time passes and now we are impressed and immersed in the flow of films from Hong Kong, Taiwan, China, South Korea, the Philippines, with Japan a less significant player, and India and Pakistan more prolific than ever in making entertainment for the mass audience. No one has given it a name or described it as "New Wave," it is simply Asian Cinema -- the most exciting development in filmmaking taking place in the world today. In China everything is falling apart yet it manages to hold together, nothing works yet it keeps on going, nothing is ever finished or properly maintained, and yes, here time does wait for every man. But as far...

Heterotrophic Kinetic Parameter Estimation for Enhanced Biological Phosphorus Removal Processes Operated in Conventional and Membrane-Assisted Modes

2006 ◽  
Vol 41 (1) ◽  
pp. 72-83 ◽  
Author(s):  
Zhe Zhang ◽  
Eric R. Hall
Keyword(s):  
Parameter Estimation ◽  
Phosphorus Removal ◽  
Growth Yield ◽  
Pilot Scale ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Nitrogen And Phosphorus ◽  
Parameter Values ◽  
The Impact ◽  
Biological Phosphorus

Abstract Parameter estimation and wastewater characterization are crucial for modelling of the membrane enhanced biological phosphorus removal (MEBPR) process. Prior to determining the values of a subset of kinetic and stoichiometric parameters used in ASM No. 2 (ASM2), the carbon, nitrogen and phosphorus fractions of influent wastewater at the University of British Columbia (UBC) pilot plant were characterized. It was found that the UBC wastewater contained fractions of volatile acids (SA), readily fermentable biodegradable COD (SF) and slowly biodegradable COD (XS) that fell within the ASM2 default value ranges. The contents of soluble inert COD (SI) and particulate inert COD (XI) were somewhat higher than ASM2 default values. Mixed liquor samples from pilot-scale MEBPR and conventional enhanced biological phosphorus removal (CEBPR) processes operated under parallel conditions, were then analyzed experimentally to assess the impact of operation in a membrane-assisted mode on the growth yield (YH), decay coefficient (bH) and maximum specific growth rate of heterotrophic biomass (µH). The resulting values for YH, bH and µH were slightly lower for the MEBPR train than for the CEBPR train, but the differences were not statistically significant. It is suggested that MEBPR simulation using ASM2 could be accomplished satisfactorily using parameter values determined for a conventional biological phosphorus removal process, if MEBPR parameter values are not available.

scholarly journals Wealth Rheology

Entropy ◽  
2021 ◽  
Vol 23 (7) ◽  
pp. 842
Author(s):  
Zdzislaw Burda ◽  
Malgorzata J. Krawczyk ◽  
Krzysztof Malarz ◽  
Malgorzata Snarska
Keyword(s):  
Exchange Rate ◽  
Simple Model ◽  
Real Data ◽  
Ranking List ◽  
Kendall’S Τ ◽  
The World ◽  
The Usa ◽  
Overlap Ratio ◽  
Growth Volatility ◽  
Wealth Rank

We study wealth rank correlations in a simple model of macroeconomy. To quantify rank correlations between wealth rankings at different times, we use Kendall’s τ and Spearman’s ρ, Goodman–Kruskal’s γ, and the lists’ overlap ratio. We show that the dynamics of wealth flow and the speed of reshuffling in the ranking list depend on parameters of the model controlling the wealth exchange rate and the wealth growth volatility. As an example of the rheology of wealth in real data, we analyze the lists of the richest people in Poland, Germany, the USA and the world.

scholarly journals A Model of the International Monetary System*

2017 ◽  
Vol 133 (1) ◽  
pp. 295-355 ◽  
Author(s):  
Emmanuel Farhi ◽  
Matteo Maggiori
Keyword(s):  
Simple Model ◽  
Gold Standard ◽  
Supply And Demand ◽  
International Monetary System ◽  
Rate System ◽  
Monetary System ◽  
The World ◽  
The Common ◽  
Triffin Dilemma ◽  
World Supply

AbstractWe propose a simple model of the international monetary system. We study the world supply and demand for reserve assets denominated in different currencies under a variety of scenarios: a hegemon versus a multipolar world; abundant versus scarce reserve assets; and a gold exchange standard versus a floating rate system. We rationalize the Triffin dilemma, which posits the fundamental instability of the system, as well as the common prediction regarding the natural and beneficial emergence of a multipolar world, the Nurkse warning that a multipolar world is more unstable than a hegemon world, and the Keynesian argument that a scarcity of reserve assets under a gold standard or at the zero lower bound is recessionary. Our analysis is both positive and normative.

scholarly journals HCV Detection, Discrimination, and Genotyping Technologies

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3423 ◽  
Author(s):  
Shrikant Warkad ◽  
Satish Nimse ◽  
Keum-Soo Song ◽  
Taisun Kim
Keyword(s):  
Hepatitis C ◽  
Hcv Infection ◽  
World Health ◽  
Clinical Samples ◽  
Infected People ◽  
Advantages And Disadvantages ◽  
Highly Sensitive ◽  
The World ◽  
Health Organization

According to the World Health Organization (WHO), 71 million people were living with Hepatitis C virus (HCV) infection worldwide in 2015. Each year, about 399,000 HCV-infected people succumb to cirrhosis, hepatocellular carcinoma, and liver failure. Therefore, screening of HCV infection with simple, rapid, but highly sensitive and specific methods can help to curb the global burden on HCV healthcare. Apart from the determination of viral load/viral clearance, the identification of specific HCV genotype is also critical for successful treatment of hepatitis C. This critical review focuses on the technologies used for the detection, discrimination, and genotyping of HCV in clinical samples. This article also focuses on advantages and disadvantages of the reported methods used for HCV detection, quantification, and genotyping.

Risk Comparison of Karachi Stock Exchange with Next Eleven Countries: A Country Beta Approach

2014 ◽  
Vol 4 (1) ◽  
pp. 202
Author(s):  
Aqeel Abbas ◽  
Sajjad Ahmad Baig ◽  
Muhammad Zia-ur-Rehman ◽  
Muhammad Abrar
Keyword(s):  
South Korea ◽  
Stock Exchange ◽  
Country Risk ◽  
Stock Exchanges ◽  
Global Index ◽  
The World ◽  
Better Than

This study is based on the Country risk of different stock exchanges of the world. Here Country risk is derived from the Country Beta Approach, as this approach is described by the Erb, Harvey and Viskanta (1996). Specifically, this study is based on the risk comparison of KSE 100 with next eleven countries (South Korea, Iran, Mexico, Philippine, Indonesia, Turkey, Egypt, Nigeria, Pakistan, Vietnam and Bangladesh), which are defined by the Goldman Sachs (2005). For this purpose, the stock exchange's data of these countries is compared with the global index. Actually, the global index is consisted on the 44 countries of the world. Here only one factor is discussed, which is a country risk (country beta). Actually the riskiness is measured in this study on the basis of beta, higher the beta means higher the risk; lower the beta means low the risk. The result shows that the performance of KSE is much better than the next eleven economies but Nigerian stock exchange has less risk than the KSE 100.

Spatial scale effects on model parameter estimation and predictive uncertainty in ungauged basins

2012 ◽  
Vol 44 (3) ◽  
pp. 441-453 ◽  
Author(s):  
Denis A. Hughes ◽  
Evison Kapangaziwiri ◽  
Jane Tanner
Keyword(s):  
Parameter Estimation ◽  
Spatial Scale ◽  
Scale Effects ◽  
Physical Property ◽  
Hydrological Modelling ◽  
Ungauged Basins ◽  
Estimation Equations ◽  
Property Data ◽  
Physical Property Data ◽  
Parameter Values

The most appropriate scale to use for hydrological modelling depends on the model structure, the purpose of the results and the resolution of available data used to quantify parameter values and provide the climatic forcing. There is little consensus amongst the community of model users on the appropriate model complexity and number of model parameters that are needed for satisfactory simulations. These issues are not independent of modelling scale, the methods used to quantify parameter values, nor the purpose of use of the simulations. This paper reports on an investigation of spatial scale effects on the application of an approach to quantify the parameter values (with uncertainty) of a rainfall-runoff model with a relatively large number of parameters. The quantification approach uses estimation equations based on physical property data and is applicable to gauged and ungauged basins. Within South Africa the physical property data are available at a finer spatial resolution than is typically used for hydrological modelling. The results suggest that reducing the model spatial scale offers some advantages. Potential disadvantages are related to the need for some subjective interpretation of the available physical property data, as well as inconsistencies in some of the parameter estimation equations.

scholarly journals ESports: a Review of Foreign and Russian Media Resources

2021 ◽  
Vol 26 (2) ◽  
pp. 325-330
Author(s):  
Alina G. Chernyavskaya
Keyword(s):  
South Korea ◽  
Internet Resources ◽  
The World ◽  
The Usa ◽  
Russian Media ◽  
Video Format ◽  
Resources Development ◽  
Media Market

Millions of people all over the world watch ESports matches and follow the news about favourite teams and players. Due to the COVID-19 pandemic ESports market has received unprecedented growth of audience. The present paper is aimed at exploring and comparing specific features of ESports internet resources development around the world. The author observes the most visited ESports sites in such countries as South Korea, China, the USA, and Russia. Also, this article examines website traffic statistics to analyze the popularity of ESports internet resources among an audience. The data is based on the number of views and visitors for each country during the day, month, and year. The study showed that the Asian ESports media market prefers to use video format for providing content compared to the USA and Russia. The USA and Russia still use text and video formats.

scholarly journals Parameter Selection in the Parameter Estimation of Grade Transitions in a Polyethylene Plant

2015 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
Niklas Andersson ◽  
Per-Ola Larsson ◽  
Johan Åkesson ◽  
Niclas Carlsson ◽  
Staffan Skålén ◽  
...  
Keyword(s):  
Parameter Estimation ◽  
Steady State ◽  
State Parameter ◽  
Parameter Selection ◽  
Selection Algorithm ◽  
Parameter Estimations ◽  
Dynamic Case ◽  
Nominal Parameter ◽  
Best Parameter ◽  
Parameter Values

A polyethylene plant at Borealis AB is modelled in the Modelica language and considered for parameter estimations at grade transitions. Parameters have been estimated for both the steady-state and the dynamic case using the JModelica.org platform, which offers tools for steady-state parameter estimation and supports simulation with parameter sensitivies. The model contains 31 candidate parameters, giving a huge amount of possible parameter combinations. The best parameter sets have been chosen using a parameter-selection algorithm that identified parameter sets with poor numerical properties. The parameter-selection algorithm reduces the number of parameter sets that is necessary to explore. The steady-state differs from the dynamic case with respect to parameter selection. Validations of the parameter estimations in the dynamic case show a significant reduction in an objective value used to evaluate the quality of the solution from that of the nominal reference, where the nominal parameter values are used.

scholarly journals A very simple model to account for the rapid rise of the British variant of SARS-CoV-2 in several countries and the world

2021 ◽  
Author(s):  
Hugo Fort
Keyword(s):  
Simple Model ◽  
Evolutionary Model ◽  
Single Parameter ◽  
Rapid Rise ◽  
The World ◽  
The Uk

Since its first detection in the UK in September 2020, a highly contagious version of the coronavirus, called the British variant or B.1.1.7 SARS-CoV-2 virus lineage, is rapidly spreading across several countries and becoming the dominant strain in the outbreak. Here it is shown that a very simple evolutionary model, when including the latest available data from March 2021, can fit the observed change in frequency of B.1.1.7 for several countries, regions of countries and the whole world with a single parameter which is almost universal.

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