Results 71 to 80 of about 280,390 (261)

A Commentary on US Sovereign Debt Persistence and Nonlinear Fiscal Adjustment

Mathematics
The purpose of this paper is to show how the self-exciting threshold autoregressive (SETAR) model might be a suitable econometric framework for characterizing the dynamics of the US public debt/GDP ratio after the Bretton Woods collapse.
Vladimir Andric, Dusko Bodroza, Mihajlo Djukic   +2 more
doaj   +1 more source

Effect of Oxygen Content on Surface and Subsurface Integrity During Turning of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
This study examines how oxygen content in the ambient atmosphere affects the surface and subsurface properties of Ti–6Al–4V during turning. Results show that oxygen does not influence surface roughness. However, machining in an extremely high vacuum‐adequate atmosphere increases surface hardness by up to 7.8% and induces compressive residual stresses ...
Benjamin Bergmann, Berend Denkena, Hilke Petersen, Florian Schaper   +3 more
wiley   +1 more source

Unravelling the nexus between energy prices and exchange rate in Malaysia: Fresh insights from a non-linear perspective using threshold cointegration analysis

Heliyon
This paper proposes a nonlinear threshold cointegration framework to study how energy prices affect Malaysia's nominal exchange rate, considering the money supply, income, and interest rate.
Shamaila Butt, Muhammad Ramzan, Wing-Keung Wong, Muhammad Ali Chohan, Ayman Hassan Bazhair   +4 more
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Movement of equilibrium of Cournot duopoly and the visualization of bifurcations of its adjustment dynamics [PDF]

This paper deals with the analytical and graphical representation of the bifurcations appearing from the adjustment dynamics of a 2- player Cournot duopoly, proposed by Puu (1997).
Chokri Dridi, Michael Sonis
core  

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

Advanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold, Dylan Jennings, Robert Vaßen   +2 more
wiley   +1 more source

Forward Exchange Rate Puzzle: Joining the Missing Pieces in the Rand-US Dollar Exchange Market [PDF]

The Unbiased Forward Rate Hypothesis (UFRH) stipulates that the forward rates should be a perfect predictor for the future spot rates. A number of studies have tested the UFRH and foreign market efficiency and concluded that the hypothesis does not hold.
Lumengo Bonga-Bonga
core   +1 more source

Stimulated Raman scattering in an optical parametric oscillator based on periodically poled MgO-doped stoichiometric LiTaO3

, 2009
The evolution versus pump power of the spectrum of a singly resonant optical parametric oscillator based on an MgO-doped periodically poled stoichiometric lithium tantalate crystal is observed.
Bruner, C. Drag, F. Bretenaker, Harris, Henderson, Henderson, Hirohashi, Johnston, Melkonian, My, O. Mhibik, O. Robin, Okishev, Penna, Samanta, Samanta, Samanta, Strossner, T-H. My, Vainio   +19 more
core   +1 more source

Numerical Modeling of Tank Cars Carrying Hazardous Materials With and Without Composite Metal Foam

Advanced Engineering Materials, EarlyView.
Large‐scale puncture models consisting of hazardous materials (HAZMATs) tank car with protective steel–steel composite metal foam (S–S CMF) are solved numerically. Tank car plate with added 10.91–13.33 mm thick S–S CMF layer does not puncture. Protective S–S CMF absorbs impact energy, reduces plate deformation, and prevents shear bands formation ...
Aman Kaushik, Afsaneh Rabiei
wiley   +1 more source

Partial Volume Prediction Through Nonlinear Mixed Modeling

Floresta e Ambiente
The objective of this study was to assess the prediction of partial volumes with nonlinear mixed modeling for Pinus taeda. The volume of 558 trees was measured.
Marcos Felipe Nicoletti, Samuel de Pádua Chaves e Carvalho, Sebastião do Amaral Machado, Afonso Figueiredo Filho, Gustavo Silva Oliveira   +4 more
doaj   +1 more source