Results 81 to 90 of about 153,653 (286)

Statistical properties of an ensemble of vortices interacting with a turbulent field

, 2005
We develop an analytical formalism to determine the statistical properties of a system consisting of an ensemble of vortices with random position in plane interacting with a turbulent field. We calculate the generating functional by path-integral methods.
Amit D. J., F. Spineanu, Jensen R. J., Krommes J. A., M. Vlad, Mikhailovskaya L. A., Spineanu F., Stewart H. J.   +7 more
core   +1 more source

Stability of a Jensen type functional equation

Banach Journal of Mathematical Analysis, 2007
The authors solve the following Jensen type functional equation \[ mf\left(\frac{x+y+z}{m}\right)+f(x)+f(y)+f(z)= n \left[ f\left(\frac{x+y}{n}\right) + f\left(\frac{y+z}{n}\right) + f\left(\frac{z+x}{n}\right)\right], \] where \(m\) and \(n\) are nonnegative integers with \((m,n)\neq (1,1)\).
Lee, Young-Su, Chung, Soon-Yeong
openaire   +3 more sources

ESG Performance, Debt Financing, and R&D Output: Evidence From the Healthcare Sector

Business Strategy and the Environment, EarlyView.
ABSTRACT Amid growing calls for sustainability in the healthcare sector, this study examines how and under what conditions environmental, social, and governance (ESG) performance influences research and development (R&D) output. Although existing studies suggest that ESG performance enhances R&D output, the financial mechanisms that enable or constrain
Sarmad Ali, Oriana Ciani, Simone Ghislandi   +2 more
wiley   +1 more source

ESG Assurance and Dividends: Evidence From 18 Countries in Africa

Business Strategy and the Environment, EarlyView.
ABSTRACT This study examines the impact of environmental, social and governance (ESG) assurance on a firm's dividend payout policies within the unique African context. Using a staggered difference‐in‐differences (DiD) model, this study examines how voluntary third‐party assurance of ESG reports influences firms' dividend payout policies compared to ...
Samuel Karanja Kogi, June Cao
wiley   +1 more source

Stability of generalized quadratic functional equation on a set of measure zero

Annales Universitatis Paedagogicae Cracoviensis: Studia Mathematica, 2015
In this paper we prove the Hyers-Ulam stability of the following K-quadratic functional equation ∑ k ∈ K f(x+ k.y)= Lf(x)+ Lf(y), x,y ∈ E, where E is a real (or complex) vector space.
Youssef Aribou, Hajira Dimou, Abdellatif Chahbi, Samir Kabbaj   +3 more
doaj   +1 more source

Stability of Jensen functional equation on semigroups

Journal of Mathematical Analysis and Applications, 2010
A real function \(f\) defined on a semigroup \(S\) is Jensen if it satisfies the functional equation \(f(xyz)+f(xzy)+2f(x)-2f(xy)-2f(xz)=0\). In this paper, the authors investigate the Hyers-Ulam stability of the above equation and prove that each semigroup can be embedded into a semigroup such that the equation above is stable.
Faĭziev, Valeriĭ A., Riedel, Thomas
openaire   +2 more sources

Does Managerial Ability Improve Environmental Performance and Overall ESG Ratings? The Impact of the European Sustainability Reporting Mandate

Business Strategy and the Environment, EarlyView.
ABSTRACT This study examines the role of managerial ability in driving environmental performance and overall environmental, social, and governance (ESG) ratings in the context of the European Union sustainability reporting regulations. Using a sample of 7242 firm‐year observations over the period 2015–2023, our results indicate a structural change in ...
Mihaela Ionașcu, Ion Ionașcu, Elena Turuianu   +2 more
wiley   +1 more source

Solvent‐Driven Pore Engineering in Coffee‐Derived Activated Hydrochar: Implications for Post‐Combustion CO2 Capture

Carbon Energy, EarlyView.
Solvent washing of coffee‐ground hydrochars produces activated carbons with tunable pore sizes while maintaining surface area. Removing non‐polar contaminants enhances microporosity, increasing CO2 uptake by 40%. Moderate pore sizes (9–12 Å) yield optimal CO2:N2 selectivity, whereas smaller pores reduce selectivity due to stronger interactions between ...
Muhammad Irfan Maulana Kusdhany, Maryna Vorokhta, Kazunari Sasaki, Masamichi Nishihara, Stephen Matthew Lyth   +4 more
wiley   +1 more source

Stability of a Cauchy-Jensen Functional Equation in Quasi-Banach Spaces

Journal of Inequalities and Applications, 2010
We obtain the generalized Hyers-Ulam stability of the Cauchy-Jensen functional equation .
Park Won-Gil, Bae Jae-Hyeong
doaj  

An observation‐driven state‐space model for claims size modelling

Canadian Journal of Statistics, EarlyView.
Abstract State‐space models are popular in econometrics. Recently, these models have gained some popularity in the actuarial literature. The best known state‐space models are of the Kalman‐filter type. These are called parameter‐driven because the observations do not impact the state‐space dynamics.
Jae Youn Ahn, Himchan Jeong, Mario V. Wüthrich   +2 more
wiley   +1 more source