Results 91 to 100 of about 40,912 (303)
Chemie Ingenieur Technik, EarlyView.This study explores the process chain for reverse engineering and additive manufacturing of a water pump impeller in a process plant. Key aspects include digital twin creation, CAD redesign, material certification, Hirtisation postprocessing, and performance testing. Insights highlight iterative design for improved precision and reliability.
Michael Stadler +3 more
wiley +1 more source
A COMPARISON OF ARCH MODELS: THE DETERMINANTS OF BITCOIN’S PRICE [PDF]
Akademičnij OglâdThe aim of this study is to determine the number of transactions among the currencies, which will eventually become a part of our lives, cannot be physically held, can move quickly, and emerge as a new shopping and investment tool in the changing world
Esin Demirel
doaj +1 more source
A Fast and Highly Stable Aqueous Calcium‐Ion Battery for Sustainable Energy Storage
ChemSusChem, Volume 18, Issue 6, March 15, 2025.Aqueous batteries provide a low‐cost, safer alternative to lithium‐ion batteries, but their viability is often limited by rapid electrode degradation. This study shows that replacing K+ with divalent Ca2+ ions in the electrolyte significantly boosts the stability of both copper hexacyanoferrate cathodes and polyimide anodes, enabling fast‐charging ...
Raphael L. Streng +4 more
wiley +1 more source
Estimando o value-at-risk (VaR) de carteiras via modelos da família Garch e simulação de Monte Carlo
Revista de Economia Mackenzie, 2013 O objetivo deste trabalho é calcular o VaR de carteiras por meio dos modelos da família Garch com erros normais e t-Student e via simulação de Monte Carlo. Foram utilizadas três carteiras compostas por ações preferenciais de cinco empresas do Ibovespa.
Lucas Lúcio Godeiro
doaj
Decoding the Nifty50 Puzzle with ANN: FIIs, DIIs and Market Magic
Финансы: теория и практикаIn the context of a dynamic and highly competitive financial market, understanding the behaviour of various categories of investors becomes a key factor in developing effective investment strategies and forecasting market trends.
N. Seth, S. Siddiqui
doaj +1 more source
Jurnal Matematika Integratif, 2019 Investors having an understanding of investment statistics are important. Especially quantitative tools related to investment risk measurement. Value-at-Risk Adjusted is one of the investment risk measurement tools, which assumes that returns are not ...
F Sukono +4 more
doaj +1 more source
Estimating the volatility of cryptocurrencies during bearish markets by employing GARCH models
Heliyon, 2019 This study examines the volatility of certain cryptocurrencies and how they are influenced by the three highest capitalization digital currencies, namely the Bitcoin, the Ethereum and the Ripple.
Νikolaos A. Kyriazis +4 more
semanticscholar +1 more source
Coupling Fluid Neutrals to Gyrokinetic Plasma Dynamics for Edge and SOL Turbulence Simulations
Contributions to Plasma Physics, EarlyView.ABSTRACT Accurate modeling of turbulent transport in magnetic confinement fusion devices requires extending first‐principles gyrokinetic simulations from the core to the edge and scrape‐off layer (SOL), where additional physics—particularly plasma–neutrals interactions—must be included.
Sabine Ogier‐Collin +3 more
wiley +1 more source
Modelling the volatility of Bitcoin returns using GARCH models
Quantitative Finance and Economics, 2019 Bitcoin has received a lot of attention from both investors and analysts, as it forms the highest market capitalization in the cryptocurrency market. This paper evaluates the volatility of Bitcoin returns using three GARCH models (sGARCH, iGARCH, and ...
S. Gyamerah
semanticscholar +1 more source
Edge Fluid Turbulence Simulations of Stellarators With GRILLIX
Contributions to Plasma Physics, EarlyView.ABSTRACT The edge fluid turbulence code GRILLIX has recently been extended from axisymmetric tokamak geometries to support 3D stellarator configurations. Following successful proof‐of‐principle simulations published in Stegmeir et al., we present here a comprehensive simulation of the Wendelstein 7‐AS stellarator.
Andreas Stegmeir +4 more
wiley +1 more source