Theoretical Concepts and Design of Modeling Languages for Mathematical Optimization

2004 ◽  
pp. 45-62 ◽  
Author(s):  
Hermann Schichl
Keyword(s):  
Mathematical Optimization ◽  
Modeling Languages ◽  
Theoretical Concepts

scholarly journals Web-Based Tool for Algebraic Modeling and Mathematical Optimization

Mathematics ◽  
2021 ◽  
Vol 9 (21) ◽  
pp. 2751
Author(s):  
Vaidas Jusevičius ◽  
Remigijus Paulavičius
Keyword(s):  
State Of The Art ◽  
Mathematical Optimization ◽  
Modeling Languages ◽  
Problem Type ◽  
Web Based ◽  
Complex Syntax ◽  
Algebraic Modeling Languages ◽  
Cross Compatibility ◽  
Language Knowledge ◽  
Compatibility Complex

In this article, we present a new open-source tool for algebraic modeling and mathematical optimization. We begin by distilling the main gaps within the existing algebraic modeling languages and tools (varying performance, limited cross-compatibility, complex syntax, and different solver, feature, and problem type support). Later, we propose a state-of-the-art web-based tool (WebAML and Optimization System) for algebraic modeling languages and mathematical optimization. The tool does not require specific algebraic language knowledge, allows solving problems using different solvers, and utilizes the best characteristics of existing algebraic modeling languages. We also provide clear extension points and ideas on how we could further improve such a tool.

Models of Thermodynamic Properties of Prominences

1979 ◽  
Vol 44 ◽  
pp. 349-355
Author(s):  
R.W. Milkey
Keyword(s):  
Thermodynamic Properties ◽  
Mass Transport ◽  
Emission Spectrum ◽  
Thermodynamic Parameters ◽  
Working Group ◽  
Physical Processes ◽  
Theoretical Concepts ◽  
Group 3 ◽  
Observational Techniques

The focus of discussion in Working Group 3 was on the Thermodynamic Properties as determined spectroscopically, including the observational techniques and the theoretical modeling of physical processes responsible for the emission spectrum. Recent advances in observational techniques and theoretical concepts make this discussion particularly timely. It is wise to remember that the determination of thermodynamic parameters is not an end in itself and that these are interesting chiefly for what they can tell us about the energetics and mass transport in prominences.

What’s Next?

2011 ◽  
Vol 23 (1) ◽  
pp. 60-63 ◽  
Author(s):  
Peter Vorderer
Keyword(s):  
Cultural Differences ◽  
Factor Model ◽  
New Developments ◽  
Theoretical Concepts ◽  
Open Questions ◽  
Entertainment Products ◽  
Entertainment Theory

This paper points to new developments in the context of entertainment theory. Starting from a background of well-established theories that have been proposed and elaborated mainly by Zillmann and his collaborators since the 1980s, a new two-factor model of entertainment is introduced. This model encompasses “enjoyment” and “appreciation” as two independent factors. In addition, several open questions regarding cultural differences in humans’ responses to entertainment products or the usefulness of various theoretical concepts like “presence,” “identification,” or “transportation” are also discussed. Finally, the question of why media users are seeking entertainment is brought to the forefront, and a possibly relevant need such as the “search for meaningfulness” is mentioned as a possible major candidate for such an explanation.

Economic effects of monetary policy in Russia: What do large datasets tell us?

2020 ◽  
pp. 31-53 ◽  
Author(s):  
Anna A. Pestova ◽  
Natalia A. Rostova
Keyword(s):  
Monetary Policy ◽  
Interest Rate ◽  
Interest Rates ◽  
Economic Activity ◽  
Global Financial Crisis ◽  
Exchange Rate Regime ◽  
Aggregate Demand ◽  
Economic Effects ◽  
Theoretical Concepts ◽  
Empirical Estimates

Is the Bank of Russia able to control inflation and, at the same time, manage aggregate demand using its interest rate instruments? In other words, are empirical estimates of the effects of monetary policy in Russia consistent with the theoretical concepts and experience of advanced economies? This paper is aimed at addressing these issues. Unlike previous research, we employ “big data” — a large dataset of macroeconomic and financial data — to estimate the effects of monetary policy in Russia. We focus exclusively on the period after the 2008—2009 global financial crisis when the Bank of Russia announced the abandoning of its fixed ruble exchange rate regime and started to gradually transit to an interest rate management. Our estimation results do not confirm standard responses of key economic activity and price variables to tightening of monetary policy. Specifically, our estimates do not reveal a statistically significant restraining effect of the Bank of Russia’s policy of high interest rates on inflation in recent years. At the same time, we find a significant deteriorating effect of the monetary tightening on economic activity indicators: according to our conservative estimates, each of the key rate increases occurred in March and December 2014 had led to a decrease in the industrial production index by about 0.2 percentage points within a year.

Political Economy of Post-Soviet Marxism (Theses to Forming of Scientific School)

2005 ◽  
pp. 36-55 ◽  
Author(s):  
A. Buzgalin ◽  
A. Kolganov
Keyword(s):  
Economic Theory ◽  
Political Economy ◽  
Transition Economies ◽  
Alternative Schools ◽  
Scientific School ◽  
Theoretical Concepts ◽  
Limited Ability ◽  
Socialist System ◽  
Soviet Marxism ◽  
Modern Russian

The limited ability of neoclassical "mainstream" to explain deep fundamental shifts in economic structures of the present day world determines the renaissance of alternative schools of economic theory, including Marxism. The article is aimed to show theoretical concepts of modern Russian neomarxism, which has a potential to explain the contradictions of the capitalist globalization, the tendencies of forming new types of socioeconomic relations, of the specific forms of transition economies in the post-socialist countries and basic causes of the birth and collapse of the socialist system.

Dimensioning a recovery boiler furnace using mathematical optimization

TAPPI Journal ◽  
2015 ◽  
Vol 14 (2) ◽  
pp. 119-129 ◽  
Author(s):  
VILJAMI MAAKALA ◽  
PASI MIIKKULAINEN
Keyword(s):  
Radial Basis Function Network ◽  
High Capacity ◽  
Mathematical Optimization ◽  
Optimization Procedure ◽  
Optimization Method ◽  
Performance Criteria ◽  
Boiler Furnace ◽  
Starting Point ◽  
Recovery Boiler ◽  
Base Design

Capacities of the largest new recovery boilers are steadily rising, and there is every reason to expect this trend to continue. However, the furnace designs for these large boilers have not been optimized and, in general, are based on semiheuristic rules and experience with smaller boilers. We present a multiobjective optimization code suitable for diverse optimization tasks and use it to dimension a high-capacity recovery boiler furnace. The objective was to find the furnace dimensions (width, depth, and height) that optimize eight performance criteria while satisfying additional inequality constraints. The optimization procedure was carried out in a fully automatic manner by means of the code, which is based on a genetic algorithm optimization method and a radial basis function network surrogate model. The code was coupled with a recovery boiler furnace computational fluid dynamics model that was used to obtain performance information on the individual furnace designs considered. The optimization code found numerous furnace geometries that deliver better performance than the base design, which was taken as a starting point. We propose one of these as a better design for the high-capacity recovery boiler. In particular, the proposed design reduces the number of liquor particles landing on the walls by 37%, the average carbon monoxide (CO) content at nose level by 81%, and the regions of high CO content at nose level by 78% from the values obtained with the base design. We show that optimizing the furnace design can significantly improve recovery boiler performance.

More than victims: Resiliency of undocumented Latinas near Chicago, United States, and the strategic use of psychological suffering in obtaining legal status

2019 ◽  
Vol 16 (3) ◽  
pp. 361-368
Author(s):  
Stephanie Jean Kohl
Keyword(s):  
United States ◽  
Domestic Violence ◽  
Legal Status ◽  
The United States ◽  
Immigration Law ◽  
Application Process ◽  
Theoretical Concepts ◽  
Psychological Suffering ◽  
Visa Application ◽  
Biological Citizenship

Caught between abusive partners and restrictive immigration law, many undocumented Latina women are vulnerable to domestic violence in the United States. This article analyzes the U-Visa application process experienced by undocumented immigrant victims of domestic violence and their legal advisors in a suburb of Chicago, United States. Drawing on theoretical concepts of structural violence and biological citizenship, the article highlights the strategic use of psychological suffering related to domestic violence by applicants for such visas. It also investigates the complex intersection between immigration law and a humanitarian clause that creates a path towards legal status and eventual citizenship.

The Politics of Repressed Guilt

2018 ◽  
Author(s):  
Claudia Leeb
Keyword(s):  
Historical Analysis ◽  
Political Life ◽  
Right Wing ◽  
National Socialist ◽  
Theoretical Concepts ◽  
Political Consequences ◽  
Critical Scholarship ◽  
Important Addition ◽  
Defensive Mechanisms ◽  
The Right

Through a critical appropriation of Hannah Arendt, and a more sympathetic engagement with Theodor W. Adorno and psychoanalysis, this book develops a new theoretical approach to understanding Austrians’ repression of their collaboration with National Socialist Germany. Drawing on original, extensive archival research, from court documents on Nazi perpetrators to public controversies on theater plays and museums, the book exposes the defensive mechanisms Austrians have used to repress individual and collective political guilt, which led to their failure to work through their past. It exposes the damaging psychological and political consequences such failure has had and continues to have for Austrian democracy today—such as the continuing electoral growth of the right-wing populist Freedom Party in Austria, which highlights the timeliness of the book. However, the theoretical concepts and practical suggestions the book introduces to counteract the repression of individual and collective political guilt are relevant beyond the Austrian context. It shows us that only when individuals and nations live up to guilt are they in a position to take responsibility for past crimes, show solidarity with the victims of crimes, and prevent the emergence of new crimes. Combining theoretical insights with historical analysis, The Politics of Repressed Guilt is an important addition to critical scholarship that explores the pathological implications of guilt repression for democratic political life.

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