scholarly journals Security assessment accounting uncertainties in line parameters and control variables with the considerations of transmission line unavailability

2018 ◽  
Vol 5 (3) ◽  
pp. 576-593
Author(s):  
Pushpendra Singh ◽  
L.S. Titare ◽  
S.C. Choube ◽  
L.D. Arya
Keyword(s):  
Transmission Line ◽  
Security Assessment ◽  
Control Variables ◽  
And Control

Food Security Doctrine – What Has Changed in 2020

2020 ◽  
pp. 7-10
Author(s):  
T.M. Yarkova ◽  
Keyword(s):  
Food Security ◽  
Public Administration ◽  
Russian Federation ◽  
Structural Changes ◽  
Food Policy ◽  
Assessment System ◽  
Security Assessment ◽  
Social Bias ◽  
The Russian Federation ◽  
And Control

This article presents an analysis of the changes that have occurred in one of the most important state documents - the Food Security Doctrine of the Russian Federation. Criticism of this document can be traced in many scientific works: some experts attribute the Doctrine only to a program document, while others expect it to be implement and control, i.e. much more in practice. An assessment of the significance and essence of such a document as the doctrine as a whole made it possible to determine its place both in the system of public administration and the degree of its significance in the regulatory field. Based on the findings, an attempt was made to analyze changes in the new Doctrine of Food Security of the Russian Federation, approved by Decree of the President of Russia No. 20 of 01.21.2020. Structural changes in the new Doctrine are highlighted, as well as a critical assessment of the features of all its main sections. The greatest changes were revealed in the state food security assessment system, and it was also determined that the new version of the Doctrine has a greater social bias. If there are positive changes, some omissions of the most important areas of agri-food policy have been identified, which, despite their absence or insufficient reflection in the Doctrine, can be presented and decided at the level of subsequent documents, but only if the Doctrine in practice will be a fundamental document of public administration and regulatory framework.

scholarly journals Optimal Control of an SIR Model with Delay in State and Control Variables

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Mohamed Elhia ◽  
Mostafa Rachik ◽  
Elhabib Benlahmar
Keyword(s):  
Optimal Control ◽  
Influenza A ◽  
Optimization Strategy ◽  
Sir Epidemic Model ◽  
Optimal Control Strategy ◽  
Control Variables ◽  
Sir Epidemic ◽  
Influenza A H1n1 ◽  
Using Data ◽  
And Control

We will investigate the optimal control strategy of an SIR epidemic model with time delay in state and control variables. We use a vaccination program to minimize the number of susceptible and infected individuals and to maximize the number of recovered individuals. Existence for the optimal control is established; Pontryagin’s maximum principle is used to characterize this optimal control, and the optimality system is solved by a discretization method based on the forward and backward difference approximations. The numerical simulation is carried out using data regarding the course of influenza A (H1N1) in Morocco. The obtained results confirm the performance of the optimization strategy.

scholarly journals Leverage Keuangan Dan Likuiditas Saham Perusahaan Manufaktur Yang Terdaftar Di Bursa Efek Jakarta

2008 ◽  
Vol 1 (3) ◽  
Author(s):  
I Made Sudana ◽  
Nurul Intan
Keyword(s):  
Multivariate Regression ◽  
Institutional Ownership ◽  
Financial Leverage ◽  
Return On Assets ◽  
Control Variables ◽  
Stock Liquidity ◽  
Market Capitalization ◽  
Risk Return ◽  
Independent Variable ◽  
And Control

This research focus on the effect of financial leverage on stock liquidity, with control variables included stock risk, return on assets, market capitalization, volume, institutional ownership during 2003-2004. This research used 86 manufacture company that listing in Jakarta Stock Exchange. Analysis method use multivariate regression. The result of partial multivariate regression indicates that financial leverage as independent variable and control variables include stock risk, return on assets, market capitalization, volume, institutional ownership have positive impact on stock liquidity. Independent variable is financial leverage and control variables include return on assets, volume, institutional ownership have significant impact on stock liquidity, while other control variables such as stock risk and market capitalization have not significant impact on stock liquidity. Simultaneously, financial leverage, stock risk, return on assets, market capitalization, volume, institutional ownership have significant impact on stock liquidity. 

Cyber Security Assessment of NPP I&C Systems

2020 ◽  
pp. 221-238
Author(s):  
Oleksandr Klevtsov ◽  
Artem Symonov ◽  
Serhii Trubchaninov
Keyword(s):  
Control Systems ◽  
Cyber Security ◽  
Nuclear Power ◽  
Power Plants ◽  
Cyber Attacks ◽  
Security Assessment ◽  
Nuclear Facilities ◽  
Security Risks ◽  
Cyber Threats ◽  
And Control

The chapter is devoted to the issues of cyber security assessment of instrumentation and control systems (I&C systems) of nuclear power plants (NPP). The authors examined the main types of potential cyber threats at the stages of development and operation of NPP I&C systems. Examples of real incidents at various nuclear facilities caused by intentional cyber-attacks or unintentional computer errors during the maintenance of the software of NPP I&C systems are given. The approaches to vulnerabilities assessment of NPP I&C systems are described. The scope and content of the assessment and periodic reassessment of cyber security of NPP I&C systems are considered. An approach of assessment to cyber security risks is described.

An efficient approximate method for solving two-dimensional fractional optimal control problems using generalized fractional order of Bernstein functions

2020 ◽  
Author(s):  
Ali Ketabdari ◽  
Mohammad Hadi Farahi ◽  
Sohrab Effati
Keyword(s):  
Optimal Control ◽  
Fractional Order ◽  
Operational Matrix ◽  
Two Dimensional ◽  
Algebraic Equations ◽  
Control Variables ◽  
Fractional Optimal Control ◽  
Bernstein Functions ◽  
Fractional Optimal Control Problems ◽  
And Control

Abstract We define a new operational matrix of fractional derivative in the Caputo type and apply a spectral method to solve a two-dimensional fractional optimal control problem (2D-FOCP). To acquire this aim, first we expand the state and control variables based on the fractional order of Bernstein functions. Then we reduce the constraints of 2D-FOCP to a system of algebraic equations through the operational matrix. Now, one can solve straightforward the problem and drive the approximate solution of state and control variables. The convergence of the method in approximating the 2D-FOCP is proved. We demonstrate the efficiency and superiority of the method by comparing the results obtained by the presented method with the results of previous methods in some examples.

Resiliency and Stock Returns

2019 ◽  
Vol 33 (2) ◽  
pp. 747-782
Author(s):  
Jian Hua ◽  
Lin Peng ◽  
Robert A Schwartz ◽  
Nazli Sila Alan
Keyword(s):  
Stock Returns ◽  
Web Site ◽  
Trading Volume ◽  
Expected Returns ◽  
Control Variables ◽  
Oxford University ◽  
And Control ◽  
Published Paper ◽  
Extensive List ◽  
Oxford University Press

Abstract We present resiliency as a measure of liquidity and assess its relationship to expected returns. We establish a covariance-based measure, RES, that captures opening period resiliency, and use it to find a significant nonresiliency premium that ranges from 33 to 57 basis points per month. The premium persists after accounting for an extensive list of other liquidity-related measures and control variables. The results are significant for both value-weighted and equal-weighted returns, when micro-cap stocks are excluded, and for a sample of large cap stocks. The premium is particularly pronounced when trading volume is high. Authors have furnished an Internet Appendix, which is available on the Oxford University Press Web site next to the link to the final published paper online.

Funding Liquidity Risk and the Dynamics of Hedge Fund Lockups

2020 ◽  
pp. 1-29
Author(s):  
Adam L. Aiken ◽  
Christopher P. Clifford ◽  
Jesse A. Ellis ◽  
Qiping Huang
Keyword(s):  
Hedge Funds ◽  
Regression Discontinuity ◽  
Hedge Fund ◽  
Liquidity Risk ◽  
Causal Link ◽  
Regression Discontinuity Design ◽  
Control Variables ◽  
Funding Liquidity ◽  
And Control ◽  
Funding Risk

Abstract We exploit the expiring nature of hedge fund lockups to create a new measure of funding liquidity risk that varies within funds. We find that hedge funds with lower funding risk generate higher returns, and this effect is driven by their increased exposure to equity-mispricing anomalies. Our results are robust to a variety of sampling criteria, variable definitions, and control variables. Further, we address endogeneity concerns in various ways, including a placebo approach and regression discontinuity design. Collectively, our results support a causal link between funding risk and the ability of managers to engage in risky arbitrage.

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