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See detailPolicy Report on migration and asylum 2010 - Luxembourg
Baltes-Löhr, Christel UL; Koch, Anne UL; Besch, Sylvain

Report (2011)

The Policy report on migration and asylum is destined for the European Migration Network (EMN) and gives an idea of the main political debates and developments in this area in Luxembourg during the year ... [more ▼]

The Policy report on migration and asylum is destined for the European Migration Network (EMN) and gives an idea of the main political debates and developments in this area in Luxembourg during the year 2010. The year 2010 was highlighted in particular by the financial and economic crisis, which was set off during the first quarter of 2008, and the reform proposals presented by the government in order to meet this crisis. Given this context, it must be understood that in terms of general political preoccupation in Luxembourg, the subject areas of migration, asylum and integration took on a more or less secondary role compared to other subject areas. Notwithstanding, the field of migration was subject to important political debates in 2010, related either to legislative changes or to concrete themes. [less ▲]

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See detailPractical Measures for Reducing Irregular Migration
Koch, Anne UL; Monteiro, Joaquim UL; Besch, Sylvain et al

Report (2011)

In this study, the EMN NCP LU attempts to provide, as far as possible, an overview of existing approaches, mechanisms and measures implemented in Luxembourg in order to address irregular migration. The ... [more ▼]

In this study, the EMN NCP LU attempts to provide, as far as possible, an overview of existing approaches, mechanisms and measures implemented in Luxembourg in order to address irregular migration. The analysis of different governmental programmes has shown that the fight against irregular migration has gradually become a priority on policy level over the last decade. As a matter of fact, for national authorities the fight against irregular migration is one part of a general immigration policy. Addressing irregular migration thus goes hand-in-hand with the promotion of legal migration in accordance with labour force requirements of the economic activity sectors. In this sense, national policy largely follows the guiding lines of European policy on the subject. This latest assertion is equally reflected by the transposition of two main EU directives relating to irregular migration into national law, in particular the “return” directive and the "sanctions" directive. On the other hand, the national legislation remains nevertheless the reflection of national political wills. Beyond the transpositions of Community law, it can be observed that the national legislative framework can and has been adapted as a response to a particular situation. Faced with pressures exerted by several associations which argue for the rights of foreigners, national authorities have stipulated pathways out of irregularity. Even if these provisions are considered widely ineffective by the associations, they are nonetheless enshrined in national law. [less ▲]

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See detailCircular and Temporary Migration, Empirical Evidence, Current Policy Practice and Future Options in LUXEMBOURG
Koch, Anne UL; Thormann, Anne; Besch, Sylvain et al

Report (2011)

Circular and temporary migrations have become important concepts at the global and EU-level and have elicited remarkable interest among policy-makers and scholars, notably in relation to the wider issue ... [more ▼]

Circular and temporary migrations have become important concepts at the global and EU-level and have elicited remarkable interest among policy-makers and scholars, notably in relation to the wider issue of migration and development. The preparation of the national contribution to the EMN study on circular and temporary migration has shown that, in Luxembourg, both political and civil society actors are unfamiliar with the concept of circular migration, which is virtually absent in political or societal debates. To a lesser degree, this also applies to temporary migration. There are no empirical studies on the subject-matter in Luxembourg. The present report therefore constitutes the first publication that addresses the topic in the national context, systematically brings together relevant sources and analyses national policy, legislation and available data. Given the lack of a national definition of both circular and temporary migration based on national legislation, the first part of the report has focused on the elaboration of working definitions of these terms. The national policy approach and vision on circular and temporary migration have been analysed in the main part of the report. In order to identify the approach to circular and temporary migration and policy preferences in the context of Luxembourg, an analysis of national legislation (including the legal provisions for relevant categories of immigrants, long-term residence status, plural nationality and the portability of social benefits) and public documents was conducted. The co [less ▲]

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See detailProperty Rights, Optimal Public Enforcement, and Growth
Irmen, Andreas UL; Kuehnel, Johanna

Report (2011)

We study the link between public enforcement of property rights, innovation investments, and economic growth in an endogenous growth framework with an expanding set of product varieties. We find that a ... [more ▼]

We study the link between public enforcement of property rights, innovation investments, and economic growth in an endogenous growth framework with an expanding set of product varieties. We find that a government may assure positive equilibrium growth through public employment in the enforcement of property rights, if the economic environment is sufficiently favorable to growth and/or public enforcement is sufficiently effective. However, in terms of welfare an equilibrium path without property rights protection and growth might be preferable. In this case the enforcement of property rights involves too much reallocation of labor from production and research towards the public sector. [less ▲]

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See detailBevölkerungsstrukturen, Umweltverhalten und Regionalökonomische Aktivitäten
Nienaber, Birte UL; Lübke, Stephanie

Report (2011)

Biosphärenreservate bieten die Chance und haben den Auftrag, neue Perspektiven für eine regionale Entwicklung zu erproben. Dabei stehen der wirtschaftende Mensch und seine Umwelt im Mittelpunkt. Die ... [more ▼]

Biosphärenreservate bieten die Chance und haben den Auftrag, neue Perspektiven für eine regionale Entwicklung zu erproben. Dabei stehen der wirtschaftende Mensch und seine Umwelt im Mittelpunkt. Die sozialwissenschaftliche Untersuchung der Universität des Saarlandes und der TU Kaiserslautern zum Biosphärenreservat Bliesgau sollen Informationen zur Bevölkerungsstruktur, zu Lebensstilen, Umweltwahrnehmung und Umweltverhalten sowie zum ökonomischen Handeln ermitteln. [less ▲]

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See detailIst Wirtschaftswachstum systemimmanent?
Irmen, Andreas UL

Report (2011)

No abstract is available for this item.

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See detailThe Type System of VCL Structural and Assertion Diagrams
Amalio, Nuno UL

Report (2011)

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See detailLes mesures pratiques mises en oeuvre afin de réduire la migration irrégulière
Koch, Anne UL; Monteiro, Joaquim UL; Besch, Sylvain et al

Report (2011)

Dans cette étude, le EMN NCP LU essaie de donner, dans la mesure du possible, les différentes perspectives et initiatives par rapport à la migration irrégulière au niveau national, en particulier les ... [more ▼]

Dans cette étude, le EMN NCP LU essaie de donner, dans la mesure du possible, les différentes perspectives et initiatives par rapport à la migration irrégulière au niveau national, en particulier les mesures pratiques mises en place pour essayer de la contenir. Du point de vue du cadre politique, la lutte contre la migration irrégulière est progressivement devenue une priorité au fil de la dernière décennie comme le démontrent les différents programmes gouvernementaux analysés dans l’étude. En effet, les autorités nationales situent la lutte contre la migration irrégulière dans une politique dite cohérente des flux migratoires. Le frein à la migration irrégulière va de pair avec une stimulation des migrations régulières en accord avec les besoins en main-d’œuvre des secteurs d’activités économiques. En ce sens, la politique nationale suit les grandes lignes d’orientation de la politique européenne en la matière. Cette dernière affirmation se reflète également par la transposition des principales directives relatives à la migration, en particulier la directive dite « retour » et la directive dite « sanctions » . D’un autre côté, la législation nationale reste toutefois également le reflet des volontés politiques nationales. Au-delà des transpositions du droit communautaire, nous pouvons constater que le cadre législatif peut être adapté pour faire face à une situation particulière. Ainsi, face aux pressions exercées par les associations qui militent pour les droits des étrangers, les autorités nationales prévoient des voies pour sortir de l’irrégularité ; certes considérées largement inefficaces par les associations mais cependant consacrées dans la loi. [less ▲]

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See detailExternal Sovereign Debt in a Monetary Union: Bailouts and the Role of Corruption
Achury, Carolina; Koulovatianos, Christos UL; Tsoukalas, John

Report (2011)

We build a tractable stylized model of external sovereign debt and endogenous international interest rates. In corrupt economies with rent-seeking groups stealing public resources, a politico-economic ... [more ▼]

We build a tractable stylized model of external sovereign debt and endogenous international interest rates. In corrupt economies with rent-seeking groups stealing public resources, a politico-economic equilibrium is characterized by permanent fiscal impatience which leads to excessive issuing of sovereign bonds. External creditors envision the corrupt economy’s fiscal impatience and buy its bonds at higher interest rates. In turn, this interest-rate increase exacerbates the problem of oversupplying debt, leading the economy to a perfect-foresight trap. In incorrupt countries which have entered a high-interest-rate/high debt-GDP-ratio trap because an immediately recent disaster has caused a sudden jump to a high outstanding debt-GDP ratio, we show that bailout plans with controlled interest rates can help in reducing debt-GDP ratios after some time. On the contrary, under corruption, we show that bailouts are ineffective unless rent-seeking groups are eradicated. [less ▲]

Detailed reference viewed: 82 (7 UL)
See detailAsset Pricing under Rational Learning about Rare Disasters
Koulovatianos, Christos UL; Wieland, Volker

Report (2011)

This paper proposes a new approach for modeling investor fear after rare disasters. The key element is to take into account that investors' information about fundamentals driving rare downward jumps in ... [more ▼]

This paper proposes a new approach for modeling investor fear after rare disasters. The key element is to take into account that investors' information about fundamentals driving rare downward jumps in the dividend process is not perfect. Bayesian learning implies that beliefs about the likelihood of rare disasters drop to a much more pessimistic level once a disaster has occurred. Such a shift in beliefs can trigger massive declines in price-dividend ratios. Pessimistic beliefs persist for some time. Thus, belief dynamics are a source of apparent excess volatility relative to a rational expectations benchmark. Due to the low frequency of disasters, even an infinitely-lived investor will remain uncertain about the exact probability. Our analysis is conducted in continuous time and offers closed-form solutions for asset prices. We distinguish between rational and adaptive Bayesian learning. Rational learners account for the possibility of future changes in beliefs in determining their demand for risky assets, while adaptive learners take beliefs as given. Thus, risky assets tend to be lower-valued and price-dividend ratios vary less under adaptive versus rational learning for identical priors. [less ▲]

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See detailCorrectness of Model Synchronization Based on Triple Graph Grammars - Extended Version
Hermann, Frank UL; Ehrig, Hartmut; Orejas, Fernando et al

Report (2011)

Success and efficiency of software and system design fundamentally relies on its models. The more they are based on formal methods the more they can be automatically transformed to execution models and ... [more ▼]

Success and efficiency of software and system design fundamentally relies on its models. The more they are based on formal methods the more they can be automatically transformed to execution models and finally to implementation code. This paper presents model transformation and model integration as specific problem within bidirectional model transformation, which has shown to support various purposes, such as analysis, optimization, and code generation. The main purpose of model integration is to establish correspondence between various models, especially between source and target models. From the analysis point of view, model integration supports correctness checks of syntactical dependencies between different views and models. The overall concept is based on the algebraic approach to triple graph grammars, which are widely used for model transformation. The main result shows the close relationship between model transformation and model integration. For each model transformation sequence there is a unique model integration sequence and vice versa. This is demonstrated by a quasi-standard example for model transformation between class models and relational data base models. [less ▲]

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See detailFrom state- to delta-based bidirectional model transformations: the symmetric case
Diskin, Zinovy; Xiong, Yingfei; Czarnecki, Krzysztof et al

Report (2011)

Success and efficiency of software and system design fundamentally relies on its models. The more they are based on formal methods the more they can be automatically transformed to execution models and ... [more ▼]

Success and efficiency of software and system design fundamentally relies on its models. The more they are based on formal methods the more they can be automatically transformed to execution models and finally to implementation code. This paper presents model transformation and model integration as specific problem within bidirectional model transformation, which has shown to support various purposes, such as analysis, optimization, and code generation. The main purpose of model integration is to establish correspondence between various models, especially between source and target models. From the analysis point of view, model integration supports correctness checks of syntactical dependencies between different views and models. The overall concept is based on the algebraic approach to triple graph grammars, which are widely used for model transformation. The main result shows the close relationship between model transformation and model integration. For each model transformation sequence there is a unique model integration sequence and vice versa. This is demonstrated by a quasi-standard example for model transformation between class models and relational data base models. [less ▲]

Detailed reference viewed: 198 (1 UL)
See detailIst Wirtschaftswachstum systemimmanent?
Irmen, Andreas UL

Report (2011)

No abstract is available for this item.

Detailed reference viewed: 68 (2 UL)
See detailRapport intermédiaire de la première phase de la recherche PSE/VE. Santé, absentéisme et travail.
Askenazy, Philippe; Cartron, Damien; Prunier-Poulmaire, Sophie et al

Report (2011)

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See detailConcurrent Model Synchronization with Conflict Resolution Based on Triple Graph Grammars-Extended Version
Hermann, Frank UL; Ehrig, Hartmut; Ermel, Claudia et al

Report (2011)

Triple graph grammars (TGGs) have been used successfully to analyse correctness of bidirectional model transformations. Most recently, also a corresponding formal approach to model synchronization has ... [more ▼]

Triple graph grammars (TGGs) have been used successfully to analyse correctness of bidirectional model transformations. Most recently, also a corresponding formal approach to model synchronization has been presented, where a forward propagation operation updates a source model modification from source to target, and symmetrically, a backward propagation operation takes care of updates from target to source models. However, a corresponding formal approach of concurrent model synchronization, where a source and a target modification have to be synchronized simultaneously, has not yet been presented and analysed. This paper closes this gap taking into account that the given and propagated source or target model modifications are in conflict with each other. Our conflict resolution strategy is semi-automatic, where a formal resolution strategy – known from previous work – can be combined with a user-specific strategy. As first main result, we show correctness of concurrent model synchronization with respect to the TGG. This means that each result of our nondeterministic concurrent update leads to a consistent correspondence between source and target models, where consistency is defined by the TGG. As second main result, we show compatibility of concurrent with basic model synchronization. In other words, concurrent model synchronization can be realized either to coincide with forward or with backward propagation. The main results are illustrated by a running example on updating organizational models. [less ▲]

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See detailVersorgungsatlas Rheinland-Pfalz: Versorgungssurvey - Berufsmonitoring - Hochrechnungen
Siegert, Michael; Leidinger, Erwin; Pitzius, Oliver et al

Report (2010)

Die wohl bedeutendste sozio-ökonomische Entwicklung, die auf unsere Gesellschaft zukommt, ist der demografische Wandel: Die Bevölkerung wird insgesamt älter und die Bevölkerungszahl wird abnehmen. Dabei ... [more ▼]

Die wohl bedeutendste sozio-ökonomische Entwicklung, die auf unsere Gesellschaft zukommt, ist der demografische Wandel: Die Bevölkerung wird insgesamt älter und die Bevölkerungszahl wird abnehmen. Dabei wird diese Entwicklung in ländlichen Gebieten früher beginnen als in städtischen Gebieten. Bis zum Jahr 2020 wird sich der Altersaufbau der Bevölkerung Deutschland verglichen mit dem heutigen Aufbau wenig ändern – danach aber umso stärker. Vor diesem Hintergrund dient der Versorgungsatlas zum einen als Bestandsaufnahme von Angebot und Nachfrage der ambulanten Versorgung in Rheinland-Pfalz. Zum anderen wird hochgerechnet, wie sich Angebot und Nachfrage in Zukunft entwickeln könnten. Dazu werden verschiedene Datenquellen zusammengeführt. Es handelt sich dabei um Befragungsdaten aus einem erstmals in Rheinland-Pfalz durchgeführten Versorgungssurvey in der allgemeinen Bevölkerung und einem Berufsmonitoring bei Medizinstudenten der Universität Mainz sowie Sekundärdaten der KV RLP. Diese Berechnungen sind Basis für die Beantwortung der Frage, ob die ambulante Versorgung in Rheinland-Pfalz auch in Zukunft qualitativ und quantitativ ausreichend gesichert ist. Der Versorgungsatlas ist das Resultat einer intensiven Zusammenarbeit von Wissenschaft und Praxis. Die KV RLP, zuständig für die Sicherstellung der ambulanten Versorgung hat die Stabsstelle Versorgungsforschung eingerichtet, um bislang brachliegende Daten und ungenutzte Ressourcen für die Versorgungsforschung zu nutzen. Der Atlas soll exemplarisch zeigen, welche Möglichkeiten der Darstellung und Analyse diese Daten und das von der Versorgungsforschung entwickelte Datenbank- und Analysesystem bietet. Dabei hat die vorliegende Printversion nur exemplarischen Charakter. Der Innovationsgehalt liegt in der Online-Nutzung der Daten. Hier verfolgt die KV RLP zwei Strategien. Zum einen werden Karten auf der Internetseite der KV RLP unter www.kv-rlp.de in kontinuierlich aktualisierter Form für die Öffentlichkeit bereitgestellt, zum anderen sind aktuelle und sehr differenzierte Analysen – zum Beispiel für die kleinräumige Niederlassungsberatung – auf Anfrage möglich. [less ▲]

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See detailLow- and High-Level Petri Nets with Individual Tokens
Modica, Tony; Gabriel, Karsten; Ehrig, Hartmut et al

Report (2010)

In this article, we present a new variant of Petri nets with markings called Petri nets with individual tokens, together with rule-based transformation following the double pushout approach. The most ... [more ▼]

In this article, we present a new variant of Petri nets with markings called Petri nets with individual tokens, together with rule-based transformation following the double pushout approach. The most important change to former Petri net transformation approaches is that the marking of a net is no longer a collective set of tokens, but each each has an own identity leading to the concept of Petri nets with individual tokens. This allows us to formulate rules that can change the marking of a net arbitrarily without necessarily manipulating the structure. As a first main result that depends on nets with individual markings we show the equivalence of transition firing steps and the application of firing-simulating rules. We define categories of low-level and of algebraic high-level nets with individual tokens, called PTI nets and AHLI nets, respectively and relate them with each other and their collective counterparts by functors. To be able to use the properties and analysis results of \MCALM-adhesive HLR systems (formerly know as weak adhesive high-level replacement systems) we show in further main results that both categories of PTI nets and AHLI nets are \MCALM-adhesive categories. By showing how to construct initial pushouts we also give necessary and sufficient conditions for the applicability of transformation rules in these categories, known as gluing condition in the literature. [less ▲]

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See detailSteady-State Growth and the Elasticity of Substitution
Irmen, Andreas UL

Report (2010)

In a neoclassical economy with endogenous capital- and labor-augmenting technical change the steady-state growth rate of output per worker is shown to increase in the elasticity of substitution between ... [more ▼]

In a neoclassical economy with endogenous capital- and labor-augmenting technical change the steady-state growth rate of output per worker is shown to increase in the elasticity of substitution between capital and labor. This confirms the assessment of Klump and de La Grandville (2000) that the elasticity of substitution is a powerful engine of economic growth. However, unlike their findings my result applies to the steady-state growth rate. Moreover, it does not hinge on particular assumptions on how aggregate savings come about. It holds for any household sector allowing savings to grow at the same rate as aggregate output. [less ▲]

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See detailFormal Analysis of Functional Behaviour for Model Transformations Based on Triple Graph Grammars - Extended Version
Hermann, Frank UL; Ehrig, Hartmut; Orejas, Fernando et al

Report (2010)

Triple Graph Grammars (TGGs) are a well-established concept for the specification of model transformations. In previous work we have formalized and analyzed already crucial properties of model ... [more ▼]

Triple Graph Grammars (TGGs) are a well-established concept for the specification of model transformations. In previous work we have formalized and analyzed already crucial properties of model transformations like termination, correctness and completeness, but functional behaviour - especially local confluence - is missing up to now. In order to close this gap we generate forward translation rules, which extend standard forward rules by translation attributes keeping track of the elements which have been translated already. In the first main result we show the equivalence of model transformations based on forward resp. forward translation rules. This way, an additional control structure for the forward transformation is not needed. This allows to apply critical pair analysis and corresponding tool support by the tool AGG. However, we do not need general local confluence because confluence for source graphs not belonging to the source language is not relevant for the functional behaviour of a model transformation. For this reason we only have to analyze a weaker property, called translation confluence. This leads to our second main result, the functional behaviour of model transformations, which is applied to our running example, the model transformation from class diagrams to database models. [less ▲]

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See detailDie Qualität des Erlebens von Lernenden in integrativen und separativen Schulformen
Venetz, Martin; Tarnutzer, Rupert; Zurbriggen, Carmen UL et al

Report (2010)

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See detailA constraint system for a SML type error slicer
Rahli, Vincent UL; Wells, J. B.; Kamareddine, Fairouz

Report (2010)

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See detailConfronting the Representative Consumer with Household-Size Heterogeneity
Koulovatianos, Christos UL; Schroeder, Carsten; Schmidt, Ulrich

Report (2010)

Much analysis in macroeconomics empirically addresses economy-wide incentives behind consumer/investment choices by using insights from the way a single representative household would behave ... [more ▼]

Much analysis in macroeconomics empirically addresses economy-wide incentives behind consumer/investment choices by using insights from the way a single representative household would behave. Heterogeneity at the micro level can jeopardize attempts to back up the representative consumer construct with microfoundations. One complex aspect of micro-level heterogeneity is household size, as individuals living in multi-member households have the potential to share goods within the household, benefiting from household-size economies. Theoretically, we show that validating the role of a representative consumer would require that the way individuals benefit from intra-household sharing is strictly aligned across the rich and the poor: once expenditures for subsistence needs are subtracted from disposable household income, household-size economies the remainder (discretionary) household incomes entail must be the same across the rich and the poor. We have designed a survey method that allows the testing of this stringent property of intra-household sharing and find that it holds. [less ▲]

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See detailAnalyse des élections au Luxembourg de Juin 2009
Dumont, Patrick UL; Kies, Raphaël UL; Spreitzer, Astrid et al

Report (2010)

Le chapitre 1 Législations, partis et campagne électorale au Luxembourg retrace d’une part les transformations du système politique luxembourgeois (avec la modification de la loi électorale, la ... [more ▼]

Le chapitre 1 Législations, partis et campagne électorale au Luxembourg retrace d’une part les transformations du système politique luxembourgeois (avec la modification de la loi électorale, la promulgation de loi sur le financement des partis politiques et les évènements qui ont marqué la législature 2004-2009) et, d’autre part analyse les enjeux et challenges de la législature 2004-2009. Il se focalise sur la campagne électorale de septembre 2008 à juin 2009 (aussi bien à travers les sondages que par un dépouillement exhaustif de la presse quotidienne et hebdomadaire luxembourgeoise de langue allemande et française à caractère politique). Le chapitre 2 Formation de l’opinion et candidats aux législatives et européennes a pour objet les conditions de la formation de l’opinion, de la représentation et de la médiation en politique au Grand-Duché. Ce chapitre informe particulièrement sur comment les citoyens forment leurs intentions de vote, les stratégies des partis tant dans le choix des candidatures que dans la mise en forme de leurs identités politiques et leurs relations avec les autres acteurs du système politique, communément appelés la « société civile ». Le chapitre 3 Résultats des élections législatives et européennes introduit non seulement de nouveaux modes de calculs pour la présentation des résultats, mais établit aussi des corrélations entre des caractéristiques socio-démographiques, tirées des données du recensement de 2001, des données statistiques sur la population en 2008 et en 2009 du STATEC et de l’IGSS de 2009 et des résultats des partis au niveau des 116 communes du Luxembourg. Les chapitre 4 et 5 Électorats dans les sondages pré & post-électoral visent, quant à eux, à établir le portrait sociologique des électorats des partis et leurs valeurs à travers tant les classiques déterminants du vote, comme la structure par âge, par genre, par niveau d’instruction et par situation face à l’emploi que par l’échelle des valeurs « matérialistes »/ »post-matérialistes » conceptualisée par Ronald Inglehart et ses disciples. En plus de l’étude des Luxembourgeois, pour la première fois, nous analysons aussi les étrangers résidents au Luxembourg. Le chapitre 6 Étude des bulletins marque la continuité avec les études précédentes sur les élections législatives et européennes, puisque c’est la huitième fois qu’il est procédé à un échantillonnage des bulletins réels pour les élections législatives. Cette analyse permet, d’une part, d’évaluer les proximités entre les partis eux-mêmes et, d’autre part, de mesurer les performances des politiques électorales personnelles des candidats, indépendamment de leurs affiliations personnelles. Nouveauté en 2009, il a été étudié également les bulletins pour les élections européennes. [less ▲]

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See detailModeling and Reconfiguration of critical Business Processes for the purpose of a Business Continuity Management respecting Security Risk and Compliance requirements at Credit Suisse using Algebraic Graph Transformation: Extended Version
Brandt, Christoph; Hermann, Frank UL; Groote, Jan-Friso

Report (2010)

Critical business processes can fail. A Business Continuity Management System is a special management system that will de ne how to recover from such failures and speci es temporary work-arounds to make ... [more ▼]

Critical business processes can fail. A Business Continuity Management System is a special management system that will de ne how to recover from such failures and speci es temporary work-arounds to make sure a company is not going out of business in the worst case. However, because today's implementations are primarily organizational best-practice solutions, their security, risk and compliance issues in such a recovery situation are mostly unknown. Algebraic graph theory can be used as a formal method supporting employees when running business processes need to be recon gured to recover from speci c failures. The example discussed is a loan granting process in a real-world banking environment. Because such a process has to respect certain laws, regulations and rules even in emergency situations, we sketch how this can be done during the process recon guration by looking at security, risk and compliance issues, compatible with the graph technique. Furthermore, we show how the analysis can be extended to requirements concerning the information ow using the process algebra mCRL2. [less ▲]

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See detailEfficient Process Analysis of Transformation Systems Based on Petri nets
Hermann, Frank UL; Corradini, Andrea; Ehrig, Hartmut et al

Report (2010)

In the framework of adhesive transformation systems with Negative Application Conditions (NACs), we show how the problem of computing the set of equivalent derivations to a given one can be reduced to the ... [more ▼]

In the framework of adhesive transformation systems with Negative Application Conditions (NACs), we show how the problem of computing the set of equivalent derivations to a given one can be reduced to the analysis of the reachability graph of a generated Place/Transition Petri net. This net encodes the dependencies among rule applications of the derivation, including the inhibiting e ects of the NACs. We show the e ectiveness of this approach by comparing the cost of a brute force-approach with the cost of the presented analysis applied to a derivation of a simple system, showing a signi cant improvement in speed. [less ▲]

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See detailEfficient Analysis and Execution of Correct and Complete Model Transformations Based on Triple Graph Grammars - Extended Version
Hermann, Frank UL; Ehrig, Hartmut; Golas, Ulrike et al

Report (2010)

Triple Graph Grammars are a well-established, formal and intuitive concept for the specification and analysis of bidirectional model transformations. In previous work we have formalized and analyzed ... [more ▼]

Triple Graph Grammars are a well-established, formal and intuitive concept for the specification and analysis of bidirectional model transformations. In previous work we have formalized and analyzed already termination, correctness, completeness, local confluence and functional behaviour. In this paper, we show how to improve the efficiency of the execution and analysis of model transformations in practical applications by using triple rules with negative application conditions (NACs). In addition to specification NACs, which improve the specification of model transformations, the generation of filter NACs improves the efficiency of the execution and the analysis of functional behaviour supported by critical pair analysis of the tool AGG. We illustrate the results for the well-known model transformation from class diagrams to relation database models. [less ▲]

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See detailEnterprise Modelling using Algebraic Graph Transformation - Extended Version
Brandt, Christoph; Hermann, Frank UL; Ehrig, Hartmut et al

Report (2010)

An analysis of today's situation at Credit Suisse has shown severe problems, because it is based on current best practices and ad-hoc modelling techniques to handle important aspects of security, risk and ... [more ▼]

An analysis of today's situation at Credit Suisse has shown severe problems, because it is based on current best practices and ad-hoc modelling techniques to handle important aspects of security, risk and compliance. Based on this analysis we propose in this paper a new enterprise model which allows the construction, integration, transformation and evaluation of di erent organizational models in a big decentralized organization like Credit Suisse. The main idea of the new model framework is to provide small decentralized models and intra-model evaluation techniques to handle services, processes and rules separately for the business and IT universe on one hand and for human-centric and machine-centric concepts on the other hand. Furthermore, the new framework provides inter-modelling techniques based on algebraic graph transformation to establish the connection between di erent kinds of models and to allow integration of the decentralized models. In order to check for security, risk and compliance in a suitable way, our models and techniques are based on di erent kinds of formal methods. In this paper, we show that algebraic graph transformation techniques are useful not only for intra-modelling { using graph grammars for visual languages and graph constraints for requirements { but also for inter-modelling { using triple graph grammars for model transformation and integration. Altogether, we present the overall idea of our new model framework and show how to solve speci c problems concerning intra- and inter-modelling as rst steps. This should give evidence that our framework can also ? This work is partially supported by Credit Suisse (Luxembourg) S.A., 56, Grand Rue BP 40, L-1660 Luxembourg, Telephone: +352 46 00 11-1, Fax: +352 46 32 70 handle important other requirements for enterprise modelling in a big decentralized organization like Credit Suisse. [less ▲]

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See detailELER - Plan zur Entwicklung des ländlichen Raums im Saarland 2007-2013, Halbzeitbewertung 2007-2009
Doluschitz, Rainer; Grosskopf, Werner; Nienaber, Birte UL

Report (2010)

This is the mid-term evaluation of the EAFRD programme (2007-2013) in Saarland, Germany.

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See detailWunnéngshëllef: Eine Institution im Wandel. Anlayse der Erfahrungen, Interessen und Motive der Mitarbeiter als Grundlage der Konzept- und Strategieentwicklung
Biewers, Sandra UL; Joachim, Patrice UL

Report (2009)

Der vorliegende Evaluationsbericht dokumentiert die Ergebnisse einer Studie, die im Sommer 2005 durch die Wunnéngshëllef beim luxemburgischen Forschungsinstitut CESIJE (Centre d'Etudes sur la Situation ... [more ▼]

Der vorliegende Evaluationsbericht dokumentiert die Ergebnisse einer Studie, die im Sommer 2005 durch die Wunnéngshëllef beim luxemburgischen Forschungsinstitut CESIJE (Centre d'Etudes sur la Situation des Jeunes en Europe) in Auftrag gegeben wurde. Sie hat das Ziel, die strukturellen und konzeptionellen Leistungen der Institution Wunnéngshëllef mit sozialwissenschaftlichen Instrumenten zu beleuchten und zu analysieren, um hieraus Einschätzungen zur Ist-Situation der institutionellen und organisatorischen Abläufe, ihrer Qualität, aber auch des Entwicklungsbedarfs und des Entwicklungspotentzials zu erhalten. [less ▲]

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See detailOn-the-Fly Construction, Correctness and Completeness of Model Transformations based on Triple Graph Grammars: Long Version
Ehrig, Hartmut; Ermel, Claudia; Hermann, Frank UL et al

Report (2009)

Triple graph grammars (TGGs) are a formal and intuitive concept for the specification of model transformations. Their main advantage is an automatic derivation of operational rules for bidirectional model ... [more ▼]

Triple graph grammars (TGGs) are a formal and intuitive concept for the specification of model transformations. Their main advantage is an automatic derivation of operational rules for bidirectional model transformations, which simplifies specification and enhances usability as well as consistency. In this paper we continue previous work on the formal definition of model transformations based on triple graph rules with negative application conditions (NACs). The new notion of partial source consistency enables us to construct consistent model transformations on-the-fly instead of analyzing consistency of completed model transformations. We show the crucial properties termination, correctness and completeness (including NAC-consistency) for the model transformations resulting from our construction. Moreover we define parallel independence for model transformation steps which allows us to perform partial-order reduction in order to improve efficiency. The results are applicable to several relevant model transformations and in particular to our example transformation from class diagrams to database models. [less ▲]

Detailed reference viewed: 63 (1 UL)
See detailKnowledge Structures
Müller, Moritz; COWAN, Robin; Duysters, Geert et al

Report (2009)

This paper investigates how technological distance between firms affects their network of R\&D alliances. Our theoretic model assumes that the benefit of an alliance between two firms is given by their ... [more ▼]

This paper investigates how technological distance between firms affects their network of R\&D alliances. Our theoretic model assumes that the benefit of an alliance between two firms is given by their technological distance. This benefit-distance relationship determines the ego-network of each firm as well as the overall network structure. Empirical relevance is confirmed for the bio-pharmaceutical industry. Although we find that the network structure is largely explained by firm size, technological distance determines the positioning of firms in the network. [less ▲]

Detailed reference viewed: 101 (3 UL)
See detailReconciliation between work, private and family life in the European Union
Margherita, Antonia UL; O'Dorchai, Sile; Bosch, Jelle et al

Report (2009)

Work is a source of income, professional satisfaction and social contact. However, work is not always easy to combine with family life and other private activities, especially for parents. Reconciling ... [more ▼]

Work is a source of income, professional satisfaction and social contact. However, work is not always easy to combine with family life and other private activities, especially for parents. Reconciling both demands is an important issue for many citizens in the European Union. This publication looks at various aspects of the issue of reconciliation of work with family life. It features discussions of the data sources used and gives an overview of the differences in the relevant legal arrangements in the Member States. The report starts with a description of the labour market situation, including developments in part-time work, fixed-term contracts and household composition. The following chapters cover working hours with special attention to unpaid family work, childcare and other care services, maternity and parental leave and flexibility in working time arrangements, including atypical working times such as working at night or at the weekend. [less ▲]

Detailed reference viewed: 637 (17 UL)
See detailShe Figures 2009 – Statistics and Indicators on Gender Equality in Science
O'Dorchai, Sile; Meulders, Danièle; Crippa, Francesca et al

Report (2009)

She Figures 2009 is the third publication (following She Figures 2003 and She Figures 2006) of a key set of indicators that are essential to correctly comprehend the situation of women in science and ... [more ▼]

She Figures 2009 is the third publication (following She Figures 2003 and She Figures 2006) of a key set of indicators that are essential to correctly comprehend the situation of women in science and research. [less ▲]

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See detailKeep It Small, Keep It Real: Efficient Run-time Verification of Web Service Compositions
Baresi, Luciano; Bianculli, Domenico UL; Guinea, Sam et al

Report (2009)

Detailed reference viewed: 97 (2 UL)
See detailAutomated Performance Assessment for Service-Oriented Middleware
Bianculli, Domenico UL; Binder, Walter; Drago, Mauro Luigi

Report (2009)

Detailed reference viewed: 106 (0 UL)
See detailYouth in Europe - A statistical portrait
Desurmont, Arnaud; Margherita, Antonia UL; Alciator, Marco et al

Report (2009)

This publication attempts to draw a portrait of young people living in Europe. ‘Youth in Europe’ is based on data available at EU level, using mainly a broad selection of harmonised data sources available ... [more ▼]

This publication attempts to draw a portrait of young people living in Europe. ‘Youth in Europe’ is based on data available at EU level, using mainly a broad selection of harmonised data sources available at Eurostat. The reader will find statistical information on a wide range of topics relating to youth in Europe, including demographic aspects (ageing of the population, founding a family), health and living conditions, education and starting out in working life, and participation in cultural and social activities. The data presented in ‘Youth in Europe’ show that the situation of young people differs considerably from one country to another, which can be explained by a range of cultural, social and economic factors. This publication aims to encourage further interest and research into the fascinating world of young people in order to better understand the Europe of today and of tomorrow. [less ▲]

Detailed reference viewed: 330 (24 UL)
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See detailPermutation Equivalence of DPO Derivations with Negative Application Conditions based on Subobject Transformation Systems: Long Version
Hermann, Frank UL

Report (2009)

Switch equivalence for transformation systems has been successfully used in many domains for the analysis of concurrent behaviour. When using graph transformation as modelling framework for these systems ... [more ▼]

Switch equivalence for transformation systems has been successfully used in many domains for the analysis of concurrent behaviour. When using graph transformation as modelling framework for these systems the concept of negative application conditions (NACs) is widely used -- in particular for the specification of operational semantics. In this paper we show that switch equivalence can be improved essentially for the analysis of systems with NACs by our new concept of permutation equivalence. Two derivations respecting all NACs are called permutation-equivalent if they are switch-equivalent disregarding the NACs. In fact, there are permutation-equivalent derivations which are not switch-equivalent with NACs. As main result of the paper, we solve the following problem: Given a derivation with NACs, we can efficiently derive all permutation-equivalent derivations to the given one by static analysis. The results are based on extended techniques for subobject transformation systems which have been introduced recently. [less ▲]

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See detailCompleteness and Correctness of Model Transformations based on Triple Graph Grammars with Negative Application Conditions (Long Version)
Ehrig, Hartmut; Hermann, Frank UL; Sartorius, Christoph

Report (2009)

Model transformations are a key concept for modular and distributed model driven development. In this context, triple graph grammars have been investigated and applied to several case studies and they ... [more ▼]

Model transformations are a key concept for modular and distributed model driven development. In this context, triple graph grammars have been investigated and applied to several case studies and they show a convenient combination of formal and intuitive specification abilities. Especially the automatic derivation of forward and backward transformations out of just one specified set of rules for the integrated model simplifies the specification and enhances usability as well as consistency. Since negative application conditions (NACs) are key ingredient for many model transformations based on graph transformation we embed them in the concept of triple graph grammars. As a first main result we can extend the composition/decomposition result for triple graph grammars to the case with NACs. This allows us to show completeness and correctness of model transformations based on rules with NACs and furthermore, we can extend the characterization of information preserving model transformations to the case with NACs. The presented results are applicable to several model transformations and in particular to the well known model transformation from class diagrams to relational data bases, which we present as running example with NACs. [less ▲]

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See detailTransformation of Type Graphs with Inheritance for Ensuring Security in E-Government Networks (Long Version)
Hermann, Frank UL; Ehrig, Hartmut; Ermel, Claudia

Report (2008)

E-government services usually process large amounts of confidential data. Therefore, security requirements for the communication between components have to be adhered in a strict way. Hence, it is of main ... [more ▼]

E-government services usually process large amounts of confidential data. Therefore, security requirements for the communication between components have to be adhered in a strict way. Hence, it is of main interest that developers can analyze their modularized models of actual systems and that they can detect critical patterns. For this purpose, we present a general and formal framework for critical pattern detection and user-driven correction as well as possibilities for automatic analysis and verification at meta-model level. The technique is based on the formal theory of graph transformation, which we extend to transformations of type graphs with inheritance within a type graph hierarchy. We apply the framework to specify relevant security requirements. The extended theory is shown to fulfil the conditions of a weak adhesive HLR category allowing us to transfer analysis techniques and results shown for this abstract framework of graph transformation. In particular, we discuss how confluence analysis and parallelization can be used to enable parallel critical pattern detection and elimination. [less ▲]

Detailed reference viewed: 42 (2 UL)
See detailEvidence on the Insurance Effect of Marginal Income Taxes
Grant, Charles; Koulovatianos, Christos UL; Michaelides, Alexander et al

Report (2008)

Marginal income taxes may have an insurance effect by decreasing the effective fluctuations of after-tax individual income. By compressing the idiosyncratic component of personal income fluctuations ... [more ▼]

Marginal income taxes may have an insurance effect by decreasing the effective fluctuations of after-tax individual income. By compressing the idiosyncratic component of personal income fluctuations, higher marginal taxes should be negatively correlated with the dispersion of consumption across households, a necessary implication of an insurance effect of taxation. Our study empirically examines this negative correlation, exploiting the ample variation of state taxes across US states. We show that taxes are negatively correlated with the consumption dispersion of the within-state distribution of non-durable consumption and that this correlation is robust. [less ▲]

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See detailOn the Relationship of Model Transformations Based on Triple and Plain Graph Grammars (Long Version)
Ehrig, Hartmut; Ermel, Claudia; Hermann, Frank UL

Report (2008)

Triple graph grammars have been applied and implemented as a formal basis for model transformations in a variety of application areas. They convince by special abilities in automatic derivation of forward ... [more ▼]

Triple graph grammars have been applied and implemented as a formal basis for model transformations in a variety of application areas. They convince by special abilities in automatic derivation of forward backward and several other transformations out of just one specified set of rules for the integrated model defined by a triple of graphs. While many case studies and all implementations, which state that they are using triple graph grammars, do not use triples of graphs this paper presents the justification for many of them. It shows a one to one correspondence between triple graph grammars and suitable plain graph grammars, thus results and benefits of the triple case can be transferred to the plain case. Main results show the relationship between both graph transformation approaches, syntactical correctness of model transformations based on triple graph grammars and a sound and complete condition for functional behaviour. Theoretical results are elaborated on an intuitive case study for a model transformation from class diagrams to database models. [less ▲]

Detailed reference viewed: 58 (2 UL)
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See detailCross-Country Income Differences and Technology Diffusion in a Competitive World
Irmen, Andreas UL

Report (2008)

This paper develops a new open-economy endogenous growth model where technology diffusion allows for a stable and non-degenerate world income distribution. In accordance with the empirical literature, I ... [more ▼]

This paper develops a new open-economy endogenous growth model where technology diffusion allows for a stable and non-degenerate world income distribution. In accordance with the empirical literature, I find that country characteristics such as the social infrastructure, the degree of openness, the investment rate, population growth, the level of human capital, or growth policies such as subsidies to innovation investments explain a country’s position in the eventual world income distribution. Club convergence in growth rates can be traced back to a country’s openness and to a minimum required level of human capital. [less ▲]

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See detailFrom Model Transformation to Model Integration based on the Algebraic Approach to Triple Graph Grammars (Long Version)
Ehrig, Hartmut; Ehrig, Karsten; Hermann, Frank UL

Report (2008)

Success and efficiency of software and system design fundamentally relies on its models. The more they are based on formal methods the more they can be automatically transformed to execution models and ... [more ▼]

Success and efficiency of software and system design fundamentally relies on its models. The more they are based on formal methods the more they can be automatically transformed to execution models and finally to implementation code. This paper presents model transformation and model integration as specific problem within bidirectional model transformation, which has shown to support various purposes, such as analysis, optimization, and code generation. The main purpose of model integration is to establish correspondence between various models, especially between source and target models. From the analysis point of view, model integration supports correctness checks of syntactical dependencies between different views and models. The overall concept is based on the algebraic approach to triple graph grammars, which are widely used for model transformation. The main result shows the close relationship between model transformation and model integration. For each model transformation sequence there is a unique model integration sequence and vice versa. This is demonstrated by a quasi-standard example for model transformation between class models and relational data base models. [less ▲]

Detailed reference viewed: 50 (2 UL)
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See detailProcess Definition of Adhesive HLR Systems
Hermann, Frank UL

Report (2008)

Process models of graph transformation systems are based on the concept of occurrence grammars, which are a generalization of Petri net processes given by occurrence nets. Recently, subobject ... [more ▼]

Process models of graph transformation systems are based on the concept of occurrence grammars, which are a generalization of Petri net processes given by occurrence nets. Recently, subobject transformation systems were proposed as an abstract framework for occurrence grammars in adhesive categories, but they are restricted to monomorphic matches for transformation steps. In this paper we review the construction of STSs as processes for plain graph grammars and present an extension to weak adhesive HLR categories with non-monomorphic matching, such that e.g. attributed graph grammars are included. [less ▲]

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See detailDie Jugend in Esch. Lebenslagen, Freizeitinteressen und Freundesgruppen
Heinen, Andreas UL; Boultgen, Danielle; Willems, Helmut UL

Report (2007)

Detailed reference viewed: 96 (16 UL)
See detailPour le multilinguisme: Exploiter à l’école la diversité des contextes européens. Rapport final de la facette 2.
Artus, Frédérique; Demeuse, Marc; Reichert, Monique UL et al

Report (2007)

Detailed reference viewed: 78 (4 UL)
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See detailAn Ethical Theory of Corporate Governance History
Zetzsche, Dirk Andreas UL

Report (2007)

The present Anglo-American system of corporate control is said to be a random result of market forces, the strong influence of which resulted from a weak state, and undefined principles in the state's ... [more ▼]

The present Anglo-American system of corporate control is said to be a random result of market forces, the strong influence of which resulted from a weak state, and undefined principles in the state's economic policy until the 1930s. In contrast, in Continental Europe, strong states with a tendency to interfere with market forces were established. The events resulting in these two divergent systems must be analysed in order to understand what predominant factors catalyzed the development of the current corporate governance structures. Though values other than religious principles are likely to prevail today, this paper posits that religious foundations provide a sound explanation for the developmental path of corporate governance in Anglo-America and Continental Europe. Further, it assesses the impact of such an ethical theory of corporate governance history on contemporary convergence debate. In particular, it asserts that ethical restraints may explain path dependency, and that such an ethical path dependency is more likely in times of economic decline than in times of economic growth. Finally, it holds that, in homogeneous societies, ethics can in many respects substitute for good law. [less ▲]

Detailed reference viewed: 119 (2 UL)
See detailEuropean Union foreign direct investment yearbook 2007
Margherita, Antonia UL; Hult, Merja; Corsini, Cristina et al

Report (2007)

The direct investment pocketbook provides users with analytical aspects of foreign direct investment stocks, flows and income for the European Union. The pocketbook has a simple objective: to provide ... [more ▼]

The direct investment pocketbook provides users with analytical aspects of foreign direct investment stocks, flows and income for the European Union. The pocketbook has a simple objective: to provide political and corporate decision-makers with high quality statistical information on direct investment. [less ▲]

Detailed reference viewed: 101 (6 UL)
See detailEtat des lieux de la démocratie participative dans les Communautés Urbaines de France
Ghamroun, Samer; JUNG ép. PRELLER, Bérénice UL; Manz, Isabelle

Report (2007)

Detailed reference viewed: 128 (12 UL)
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See detailSomething out of Nothing? Neoclassical Growth and the ‘Trivial’ Steady State
Hakenes, Hendrik; Irmen, Andreas UL

Report (2006)

A common perception about the neoclassical growth model is that an economy devoid of capital cannot evolve to strictly positive levels of output if capital is essential. We challenge this view by positing ... [more ▼]

A common perception about the neoclassical growth model is that an economy devoid of capital cannot evolve to strictly positive levels of output if capital is essential. We challenge this view by positing a broad class of production functions, encompassing the neoclassical production function, that—surprisingly—show that a take-off is possible even though the initial capital stock is zero and capital is essential. Since the marginal product of capital is initially infinite, the “trivial” steady state becomes so unstable that the solution to the equation of motion involves the possibility of a take-off. When it happens, the take-off is spontaneous: there is no causality, not even randomness. [less ▲]

Detailed reference viewed: 76 (1 UL)
See detailInvestment in a Monopoly with Bayesian Learning
Koulovatianos, Christos UL; Mirman, Leonard J.; Santugini, Marc

Report (2006)

We study how learning affects an uninformed monopolist's supply and investment decisions under multiplicative uncertainty in demand. The monopolist is uninformed because it does not know one of the ... [more ▼]

We study how learning affects an uninformed monopolist's supply and investment decisions under multiplicative uncertainty in demand. The monopolist is uninformed because it does not know one of the parameters defining the distribution of the random demand. Observing prices reveals this information slowly. We first show how to incorporate Bayesian learning into dynamic programming by focusing on sufficient statistics and conjugate families of distributions. We show their necessity in dynamic programming to be able to solve dynamic programs either analytically or numerically. This is important since it is not true that a solution to the infinite-horizon program can be found either analytically or numerically for any kinds of distributions. We then use specific distributions to study the monopolist?s behavior. Specifically, we rely on the fact that the family of normal distributions with an unknown mean is a conjugate family for samples from a normal distribution to obtain closed- form solutions for the optimal supply and investment decisions. This enables us to study the effect of learning on supply and investment decisions, as well as the steady state level of capital. Our findings are as follows. Learning affects the monopolist's behavior. The higher the expected mean of the demand shock given its beliefs, the higher the supply and the lower the investment. Although learning does not affect the steady state level of capital since the uninformed monopolist becomes informed in the limit, it reduces the speed of convergence to the steady state. [less ▲]

Detailed reference viewed: 85 (2 UL)
See detailFamily-Type Subsistence Incomes
Koulovatianos, Christos UL; Schroeder, Carsten; Schmidt, Ulrich

Report (2006)

Different family types may have a fixed flow of consumption costs, related to subsistence needs. We use a survey method in order to identify and estimate such a fixed component of spending for different ... [more ▼]

Different family types may have a fixed flow of consumption costs, related to subsistence needs. We use a survey method in order to identify and estimate such a fixed component of spending for different families. Our method involves making direct questions about the linkup between aggregate disposable family income and well-being for different family types. Conducting our survey in six countries, Germany, France, Cyprus, China, India and Botswana, we provide evidence that fixed costs of consumption are embedded in welfare evaluations of respondents. More precisely, we find that the formalized relationship between welfare-retaining aggregate family incomes across different family types, suggested by Donaldson and Pendakur (2005) and termed “Generalized Absolute Equivalence Scale Exactness,” is prevalent and robust in our data. We use this relationship to identify subsistence needs of different family types and to calculate income inequality. [less ▲]

Detailed reference viewed: 122 (2 UL)
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See detailA computational approach to microRNA detection
May, Patrick UL; Bauer, Markus; Köberle, Christian et al

Report (2006)

During the last few years more and more functionalities of RNA have been discovered that were previously thought of being carried out by proteins alone. One of the most striking discoveries was the de ... [more ▼]

During the last few years more and more functionalities of RNA have been discovered that were previously thought of being carried out by proteins alone. One of the most striking discoveries was the de tection of microRNAs, a class of noncoding RNAs that play an important role in post-transcriptional gene regulation. Large-scale analyses are needed for the still increasingly growing amount of sequen ce data derived from new experimental technologies. In this paper we present a framework for the detection of the distinctive precursor structure of microRNAS that is based on the well-known Smith-Wat erman algorithm and various filtering steps. We conducted experiments on real genomic data and we found several new putative hits for microRNA precursor structures. [less ▲]

Detailed reference viewed: 86 (4 UL)
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See detailTHESEUS - Protein Structure Prediction at ZIB
May, Patrick UL; Steinke, Thomas

Report (2006)

THESEUS, the ZIB threading environment, is a parallel implementation of a protein threading based on a multi-queued branch-and-bound optimal search algorithm to find the best sequence-to-structure ... [more ▼]

THESEUS, the ZIB threading environment, is a parallel implementation of a protein threading based on a multi-queued branch-and-bound optimal search algorithm to find the best sequence-to-structure alignment through a library of template structures. THESEUS uses a template core model based on secondary structure definition and a scoring function based on knowledge-based potentials reflecting pairwise interactions and the chemical environment, as well as pseudo energies for homology detection, loop alignment, and secondary structure matching. The threading core is implemented in C++ as a SPMD parallization architecture using MPI for communication. The environment is designed for generic testing of different scoring functions, e.g. different secondary structure prediction terms, different scoring matrices and information derived from multiple sequence alignments. A validaton of the structure prediction results has been done on the basis of standard threading benchmark sets. THESEUS successfully participated in the 6th Critical Assessment of Techniques for Protein Structure Prediction (CASP) 2004. [less ▲]

Detailed reference viewed: 94 (10 UL)
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See detailProcess Reference Model "IT Grundschutz"
Asselborn, Jean-Claude; Dagorn, Nathalie; Niederkorn, Philippe et al

Report (2006)

Detailed reference viewed: 57 (0 UL)
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See detailProcess Reference Model "Mehari"
Asselborn, Jean-Claude; Dagorn, Nathalie; Niederkorn, Philippe et al

Report (2006)

Detailed reference viewed: 72 (0 UL)
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See detailEnjeux de coopération métropolitaine au sein de l’Aire Ligérienne. Synthèse et analyse des documents abordant l’aire ligérienne
Blondel, Cyril UL; Demazière, Christophe; Carrière, Jean-Paul et al

Report (2006)

Detailed reference viewed: 52 (0 UL)
See detailEuropean Union foreign direct investment yearbook 2006
Hult, Merja; Margherita, Antonia UL; Foltête, Anne et al

Report (2006)

The direct investment pocketbook provides users with analytical aspects of foreign direct investment stocks, flows and income for the European Union. The pocketbook has a simple objective: to provide ... [more ▼]

The direct investment pocketbook provides users with analytical aspects of foreign direct investment stocks, flows and income for the European Union. The pocketbook has a simple objective: to provide political and corporate decision-makers with high quality statistical information on direct investment. [less ▲]

Detailed reference viewed: 77 (5 UL)
See detailA typed attributed Graph Grammar for syntax-directed editing of UML Sequence Diagrams
Hermann, Frank UL

Report (2006)

Success and efficiency of software and system design fundamentally relies on its models. The more they are based on formal methods the more they can be automatically transformed to execution models and ... [more ▼]

Success and efficiency of software and system design fundamentally relies on its models. The more they are based on formal methods the more they can be automatically transformed to execution models and finally to implementation code. This paper presents model transformation and model integration as specific problem within bidirectional model transformation, which has shown to support various purposes, such as analysis, optimization, and code generation. The main purpose of model integration is to establish correspondence between various models, especially between source and target models. From the analysis point of view, model integration supports correctness checks of syntactical dependencies between different views and models. The overall concept is based on the algebraic approach to triple graph grammars, which are widely used for model transformation. The main result shows the close relationship between model transformation and model integration. For each model transformation sequence there is a unique model integration sequence and vice versa. This is demonstrated by a quasi-standard example for model transformation between class models and relational data base models. [less ▲]

Detailed reference viewed: 91 (4 UL)
See detailTutorial d'installation de la distribution Debian
Varrette, Sébastien UL

Report (2005)

Detailed reference viewed: 47 (1 UL)
See detailIntroduction aux réseaux de tri tolérants aux fautes
Varrette, Sébastien UL

Report (2005)

Detailed reference viewed: 33 (0 UL)
See detailEuropean Union foreign direct investment yearbook 2005
Passerini, Paolo; Margherita, Antonia UL; Kounadis, Vasileios et al

Report (2005)

In the European Union direct investment pocketbook 2005, Eurostat presents and analyses harmonised statistics on FDI flows, stocks and income for the EU as a whole.

Detailed reference viewed: 46 (6 UL)
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See detailCompétitivité de l’économie luxembourgeoise 2004
Bourgain, Arnaud UL; Bley, Laurent; Pieretti, Patrice UL et al

Report (2005)

Detailed reference viewed: 40 (1 UL)
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See detailCompétitivité de l'économie luxembourgeoise
Bourgain, Arnaud UL; Bley, Laurent; Pieretti, Patrice UL et al

Report (2005)

Detailed reference viewed: 60 (0 UL)
See detailNeoclassical Growth and the 'Trivial' Steady State
Hakenes, Hendrik; Irmen, Andreas UL

Report (2005)

If capital is an essential input, the neoclassical growth model has a steady state with zero capital. From this, one is inclined to conclude that an economy starting without capital can never grow. We ... [more ▼]

If capital is an essential input, the neoclassical growth model has a steady state with zero capital. From this, one is inclined to conclude that an economy starting without capital can never grow. We challenge this view and claim that, if the production function satisfies the Inada conditions, a take-off is possible even though the initial capital stock is zero and capital is essential. Since the marginal product of capital is initially infinite, the ‘trivial’ steady state becomes so unstable that the solution to the equation of motion involves the possibility of a take-off, even without capital. When it happens, the take-off is spontaneous; there is no causality. [less ▲]

Detailed reference viewed: 163 (3 UL)
See detailThe Effects of Market Structure on Industry Growth: Rivalrous Non-excludable Capital
Koulovatianos, Christos UL; Mirman, Leonard J.

Report (2005)

We analyze imperfect competition in dynamic environments where firms use rivalrous but nonexcludable industry-specific capital that is provided exogenously. Capital depreciation depends on utilization, so ... [more ▼]

We analyze imperfect competition in dynamic environments where firms use rivalrous but nonexcludable industry-specific capital that is provided exogenously. Capital depreciation depends on utilization, so firms influence the evolution of the capital equipment through more or less intensive supply in the final-goods market. Strategic incentives stem from, (i) a dynamic externality, arising due to the non-excludability of the capital stock, leading firms to compete for its use (rivalry), and, (ii) a market externality, leading to the classic Cournot-type supply competition. Comparing alternative market structures, we isolate the effect of these externalities on strategies and industry growth. [less ▲]

Detailed reference viewed: 103 (2 UL)
See detailPreferences and the Dynamic Representative Consumer
Koulovatianos, Christos UL

Report (2005)

This paper provides families of time-separable, twice continuously differentiable, and strictly concave utility functions of a group of consumers that are both suffcient and necessary in order to have ... [more ▼]

This paper provides families of time-separable, twice continuously differentiable, and strictly concave utility functions of a group of consumers that are both suffcient and necessary in order to have linear aggregation in a single-commodity-type deterministic dynamic environment, in the presence of consumer wealth-, labor-productivity, and preference heterogeneity, for alternative settings where the rates of time preference can be the same or different across consumers. The employed concept of linear aggregation pertains the existence of a representative consumer with a time-separable utility function. It is proved that when the rates of time preference are choice-independent and heterogeneous across consumers, a representative consumer exists if, and only if, the momentary utility functions of all consumers are exponential. Results are also provided for, (i) common across consumers choice-independent rates of time preference, and, (ii) heterogeneous choice-dependent rates of time preference, and compared with previously identified sufficient conditions for aggregation in the existing literature. [less ▲]

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