Search results for " flows"
showing 10 items of 110 documents
Particle transport in recirculated liquid metal flows
2008
PurposeAims to present recent activities in numerical modeling of turbulent transport processes in induction crucible furnace.Design/methodology/approach3D large eddy simulation (LES) method was applied for fluid flow modeling in a cylindrical container and transport of 30,000 particles was investigated with Lagrangian approach.FindingsParticle accumulation near the side crucible boundary is determined mainly by the ρp/ρ ratio and according to the presented results. Particle settling velocity is of the same order as characteristic melt flow velocity. Particle concentration homogenization time depends on the internal flow regime. Separate particle tracks introduce very intensive mass exchang…
The Consequences of Banking Crises for Public Debt
2010
The aim of this paper is to assess the consequences of banking crises for public debt. Using an unbalanced panel of 154 countries from 1980 to 2006, the paper shows that banking crises are associated with a significant and longlasting increase in government debt. The effect is a function of the severity of the crisis. In particular, for severe crises, comparable to the most recent one in terms of output losses, banking crises are followed by a medium-term increase of about 37 percentage points in the government gross debt-to-GDP ratio. In addition, the debt ratio increased more in countries with higher initial gross debt-to-GDP ratio, with a higher share of foreign debt, and with a lower qu…
How to pay for the debt — Coping with the Third World's crisis
1990
The Brady Plan is the first official proposal to give priority to a tangible reduction in the debtor countries' debt service burden and is thus a milestone along the path towards overcoming the international debt crisis. However, the instruments foreseen in the Plan virtually invite criticism and scepticism. What are the main inadequacies of the Brady Plan? How can the international debt strategy be developed further and made more effective?
MEDIUM-TERM DETERMINANTS OF INTERNATIONAL INVESTMENT POSITIONS: THE ROLE OF STRUCTURAL POLICIES
2012
This paper provides an empirical investigation of the medium-term determinants of international investment positions for a large sample of advanced and emerging economies. In addition to the usually considered drivers of foreign assets and liabilities, the analysis focuses on the role of structural policy indicators. Using cross-section and panel regression techniques the results suggest that structural policy settings are important medium-term drivers of capital flows, having a relatively large impact on gross and net foreign capital positions and on their composition. In particular, the results suggest that certain kinds of structural policy reform could help to narrow global imbalances,…
Fiscal sustainability in the EU: From the short-term risk to the long-term challenge
2015
Abstract The paper analyses fiscal sustainability of public debt using a dynamic computable general equilibrium model. First, we identify the short-term risk for fiscal stress at country level; second, we investigate the assumption of convergence towards the government debt threshold (medium-term challenge); and, third, the requirement that debt projections do not show unsustainable trends (long-term challenge). The empirical implementation includes 18 EU Member States. Our findings show that the constant tax rate that stabilizes the public debt converges to 50 percentage of GDP for all the sample countries and tax revenues are the main driving forces for fiscal sustainability. Also our fin…
Can re-regulation of the financial sector strike back public debt?
2015
This paper analyzes the impact of financial sector policy changes on the dynamics of public debt. Using a panel of 89 countries from 1973 to 2005, we find that while the implementation of (large) financial liberalisation policies significantly raises the public debt growth rate, the adoption of financial re-regulation measures leads to a mild reduction of public debt. Looking at the different typologies of financial sector policy changes, we show that stricter banking supervision, privatisations and restrictions to international capital flows contribute to a fast decline of the growth rate of public debt. In contrast, the removal of entry barriers and the elimination of interest rate contro…
The Role of Risk and Information for International Capital Flows: New Evidence from the SDDS
2012
In this paper, we investigate whether better information about the macroeconomic environment of an economy has a positive impact on its capital inflows, namely portfolio and foreign direct investment (FDI). The purpose of our study is to explicitly quantify information asymmetries by compliance with the IMF's Special Data Dissemination Standard (SDDS). For FDI, we fi nd statistically signi cant and robust support for this hypothesis: SDDS subscription increased inflows by an economically relevant magnitude of about 60 percent. We also find evidence of aversion against political and macroeconomic risk as determinants of portfolio and FDI flows and use a non-parametric test for spatial correl…
The distributed assembly permutation flowshop scheduling problem
2013
Nowadays, improving the management of complex supply chains is a key to become competitive in the twenty-first century global market. Supply chains are composed of multi-plant facilities that must be coordinated and synchronised to cut waste and lead times. This paper proposes a Distributed Assembly Permutation Flowshop Scheduling Problem (DAPFSP) with two stages to model and study complex supply chains. This problem is a generalisation of the Distributed Permutation Flowshop Scheduling Problem (DPFSP). The first stage of the DAPFSP is composed of f identical production factories. Each one is a flowshop that produces jobs to be assembled into final products in a second assembly stage. The o…
Transport equations and quasi-invariant flows on the Wiener space
2010
Abstract We shall investigate on vector fields of low regularity on the Wiener space, with divergence having low exponential integrability. We prove that the vector field generates a flow of quasi-invariant measurable maps with density belonging to the space L log L . An explicit expression for the density is also given.
Mapping Susceptibility to Debris Flows Triggered by Tropical Storms: A Case Study of the San Vicente Volcano Area (El Salvador, CA)
2021
In this study, an inventory of storm-triggered debris flows performed in the area of the San Vicente volcano (El Salvador, CA) was used to calibrate predictive models and prepare a landslide susceptibility map. The storm event struck the area in November 2009 as the result of the simultaneous action of low-pressure system 96E and Hurricane Ida. Multivariate Adaptive Regression Splines (MARS) was employed to model the relationships between a set of environmental variables and the locations of the debris flows. Validation of the models was performed by splitting 100 random samples of event and non-event 10 m pixels into training and test subsets. The validation results revealed an excellent (…