Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
Full Text
Peer Reviewed
See detailDynamical structure functions for the reverse engineering of LTI networks
Goncalves, Jorge UL; Howes, R.; Warnick, S.

in Proceedings of the 46th IEEE Conference on Decision and Control (2007)

This research explores the role and representation of network structure for LTI systems with partial state observations. We demonstrate that input-output representations, i.e. transfer functions, contain ... [more ▼]

This research explores the role and representation of network structure for LTI systems with partial state observations. We demonstrate that input-output representations, i.e. transfer functions, contain no internal structural information of the system. We further show that neither the additional knowledge of system order nor minimality of the true realization is generally sufficient to characterize network structure. We then introduce dynamical structure functions as an alternative, graphical-model based representation of LTI systems that contain both dynamical and structural information of the system. The main result uses dynamical structure to precisely characterize the additional information required to obtain network structure from the transfer function of the system. [less ▲]

Detailed reference viewed: 90 (0 UL)
Full Text
Peer Reviewed
See detailDynamics and feedback loops in the transforming growth factor beta signaling pathway.
Wegner, Katja; Bachmann, Anastasia; Schad, Jan-Ulrich et al

in Biophysical chemistry (2012), 162

Transforming growth factor beta (TGF-beta) ligands activate a signaling cascade with multiple cell context dependent outcomes. Disruption or disturbance leads to variant clinical disorders. To develop ... [more ▼]

Transforming growth factor beta (TGF-beta) ligands activate a signaling cascade with multiple cell context dependent outcomes. Disruption or disturbance leads to variant clinical disorders. To develop strategies for disease intervention, delineation of the pathway in further detail is required. Current theoretical models of this pathway describe production and degradation of signal mediating proteins and signal transduction from the cell surface into the nucleus, whereas feedback loops have not exhaustively been included. In this study we present a mathematical model to determine the relevance of feedback regulators (Arkadia, Smad7, Smurf1, Smurf2, SnoN and Ski) on TGF-beta target gene expression and the potential to initiate stable oscillations within a realistic parameter space. We employed massive sampling of the parameters space to pinpoint crucial players for potential oscillations as well as transcriptional product levels. We identified Smad7 and Smurf2 with the highest impact on the dynamics. Based on these findings, we conducted preliminary time course experiments. [less ▲]

Detailed reference viewed: 170 (1 UL)
See detailThe Dynamics Implications of Liberalizing Global Migration
Delogu, Marco UL

E-print/Working paper (2013)

Detailed reference viewed: 94 (11 UL)
Full Text
Peer Reviewed
See detailDynamics in Argumentation with Single Extensions: Abstraction Principles and the Grounded Extension
Boella, Guido UL; Kaci, Souhila UL; van der Torre, Leon UL

in Symbolic and Quantitative Approaches to Reasoning with Uncertainty, 10th European Conference, ECSQARU 2009, Verona, Italy, July 1-3, 2009. Proceedings (2009)

In this paper we consider the dynamics of abstract argumentation in Baroni and Giacomin’s framework for the evaluation of extension based argumentation semantics. Following Baroni and Giacomin, we do not ... [more ▼]

In this paper we consider the dynamics of abstract argumentation in Baroni and Giacomin’s framework for the evaluation of extension based argumentation semantics. Following Baroni and Giacomin, we do not consider individual approaches, but we define general principles or postulates that individual approaches may satisfy. In particular, we define abstraction principles for the attack relation, and for the arguments in the framework. We illustrate the principles on the grounded extension. In this paper we consider only principles for the single extension case, and leave the multiple extension case to further research. [less ▲]

Detailed reference viewed: 105 (0 UL)
Full Text
Peer Reviewed
See detailDynamics in Delegation and Revocation Schemes: A Logical Approach
Aucher, Guillaume UL; Barker, Steve; Boella, Guido UL et al

in DBSec (2011)

In this paper we first introduce a logic for describing formally a family of delegation and revocation models that are based on the work in Hagström et al.. We then extend our logic to accommodate an ... [more ▼]

In this paper we first introduce a logic for describing formally a family of delegation and revocation models that are based on the work in Hagström et al.. We then extend our logic to accommodate an epistemic interpretation of trust within the framework that we define. What emerges from this work is a rich framework of formally well-defined delegation and revocation schemes that accommodates an important trust component. [less ▲]

Detailed reference viewed: 118 (1 UL)
Full Text
Peer Reviewed
See detailDynamics maps for long-term autonomy
Ginés, J.; Martín, F.; Matellán, V. et al

in 2017 IEEE International Conference on Autonomous Robot Systems and Competitions (ICARSC) (2017)

Navigating is one of the most basic capabilities of mobile robots. For this task, robots usually represent the environment through maps. This paper reports on first results of a work focused on mapping ... [more ▼]

Navigating is one of the most basic capabilities of mobile robots. For this task, robots usually represent the environment through maps. This paper reports on first results of a work focused on mapping dynamic environments to achieve a robust navigation for long-term operation. This approach builds a static map starting from the construction plans of a building. A long-term map is started from the static map, and updated when adding and removing furniture, or when doors are opened or closed. A short-term map represents dynamic obstacles such as people. This approach is appropriate for fast deployment and long-term operations in office or domestic environments, able to adapt to changes in the environment. We demonstrate the robustness of this approach in the RoboCup@home competition, where robots must navigate in an environment that changes during the tests. [less ▲]

Detailed reference viewed: 95 (6 UL)
Peer Reviewed
See detailThe Dynamics of Agglomeration: Evidence from Ireland and Portugal
Barrios, Salvador; Bertinelli, Luisito UL; Strobl, Eric et al

in Journal of Urban Economics (2005), 57(1), 170-188

Detailed reference viewed: 90 (0 UL)
Full Text
Peer Reviewed
See detailDynamics of Blockchain Implementation : A Case Study from the Energy Sector
Albrecht, Simon; Reichert, Stefan; Schmid, Jan et al

in 51st Hawaii International Conference on System Sciences (2018)

This case study analyzes the impact of theory-based factors on the implementation of different blockchain technologies in use cases from the energy sector. We construct an integrated research model based ... [more ▼]

This case study analyzes the impact of theory-based factors on the implementation of different blockchain technologies in use cases from the energy sector. We construct an integrated research model based on the Diffusion of Innovations theory, institutional economics and the Technology-Organization-Environment framework. Using qualitative data from in-depth interviews, we link constructs to theory and assess their impact on each use case. Doing so we can depict the dynamic relations between different blockchain technologies and the energy sector. The study provides insights for decision makers in electric utilities, and government administrations. [less ▲]

Detailed reference viewed: 22 (1 UL)
Full Text
Peer Reviewed
See detailDynamics of electron-emission currents in plasmonic gaps induced by strong fields
Aguirregabiria, Garikoitz; Marinica, Dana-Codruta; Ludwig, Markus et al

in FARADAY DISCUSSIONS (2019), 214

The dynamics of ultrafast electron currents triggered by femtosecond laser pulse irradiation of narrow gaps in a plasmonic dimer is studied using quantum mechanical Time-Dependent Density Functional ... [more ▼]

The dynamics of ultrafast electron currents triggered by femtosecond laser pulse irradiation of narrow gaps in a plasmonic dimer is studied using quantum mechanical Time-Dependent Density Functional Theory (TDDFT). The electrons are injected into the gap due to the optical field emission from the surfaces of the metal nanoparticles across the junction. Further evolution of the electron currents in the gap is governed by the locally enhanced electric fields. The combination of TDDFT and classical modelling of the electron trajectories allows us to study the quiver motion of the electrons in the gap region as a function of the Carrier Envelope Phase (CEP) of the incident pulse. In particular, we demonstrate the role of the quiver motion in establishing the CEP-sensitive net electric transport between nanoparticles. [less ▲]

Detailed reference viewed: 65 (9 UL)
Full Text
Peer Reviewed
See detailThe Dynamics of Firms Location: A Revisit of Home Attachment under Tax Competition
Han, Yutao UL; Pieretti, Patrice UL; Zou, Benteng UL

in Economics Letters (2013), 121

In this short note we extend the home attachment setting of Mansoorian and Myers (1993) and Ogura (2006) to allow the study of tax competition in a dynamic framework when international business relocation ... [more ▼]

In this short note we extend the home attachment setting of Mansoorian and Myers (1993) and Ogura (2006) to allow the study of tax competition in a dynamic framework when international business relocation occurs over successive periods. The dynamic framework we propose also helps to understand why tax rates may change over time. Our modified home-attachment rule is illustrated by a simple model of dynamic tax competition in discrete time. [less ▲]

Detailed reference viewed: 223 (126 UL)
Peer Reviewed
See detailThe Dynamics of Freight Transport Development: A UK and Swiss Comparison
Hesse, Markus UL

in Journal of Transport Geography (2006), 14(1), 78-79

Detailed reference viewed: 53 (0 UL)
Full Text
Peer Reviewed
See detailThe Dynamics of Heat Shock Response Induced by Ultr asound Therapeutic Treatment
Mizera, Andrzej UL; Gambin, Barbara

in Awrejcewicz, J.; Kaźmierczak, M.; Mrozowski, J. (Eds.) et al 10th Conference on Dynamical Systems – Theory and Applications, DSTA-2009 (2009)

Detailed reference viewed: 33 (1 UL)
Full Text
Peer Reviewed
See detailThe dynamics of helping behavior for Jewish refugees during the Second World War: The importance of brokerage
During, Marten UL

in Online Encyclopedia of Mass Violence (2016)

Detailed reference viewed: 87 (16 UL)
See detailThe dynamics of helping behaviour for Jewish refugees during the Second World War. The importance of brokerage
During, Marten UL

in Gamper, Markus; Reschke, Linda; During, Marten (Eds.) Knoten und Kanten: soziale Netzwerkanalyse in Geschichts- und Politikwissenschaften (2015)

Detailed reference viewed: 88 (2 UL)
Full Text
Peer Reviewed
See detailDynamics of income rank volatility: Evidence from Germany and the US
Chauvel, Louis UL; Hartung, Anne UL; Palmisano, Flaviana

in SOEP2016 Book of Abstracts (2016)

This paper provides a methodology to compare profiles of income rank volatility over time and across distributions. While most of the existing measures are affected by changes in the marginal ... [more ▼]

This paper provides a methodology to compare profiles of income rank volatility over time and across distributions. While most of the existing measures are affected by changes in the marginal distributions, this paper proposes a framework that based on individuals’ relative position in the distribution results to be neutral to the structural changes that occur in the economy. Applying this approach to investigate rank volatility in Germany and the US over three decades, we show that while poorer individuals are the most volatile in both countries, the volatility trend of the middle class marks the difference between these two countries. [less ▲]

Detailed reference viewed: 144 (3 UL)
Full Text
Peer Reviewed
See detailDynamics of Income Rank Volatility: Evidence from Germany and the US
Chauvel, Louis UL; Hartung, Anne UL; Palmisano, Flaviana

E-print/Working paper (2017)

This paper presents a methodology for comparing income rank volatility profiles over time and across distributions. While most of the existing measures are affected by changes in marginal distributions ... [more ▼]

This paper presents a methodology for comparing income rank volatility profiles over time and across distributions. While most of the existing measures are affected by changes in marginal distributions, this paper proposes a framework that is based on individuals’ relative positions in the distribution, and is neutral in relation to structural changes that occur in the economy. Applying this approach to investigate rank volatility in Germany and the US over three decades, we show that while poorer individuals within both countries are the most volatile, the volatility trend for the middle class in each of these countries differs. [less ▲]

Detailed reference viewed: 175 (13 UL)
Peer Reviewed
See detailDynamics of income volatility: Evidence from Germany and the US
Chauvel, Louis UL; Hartung, Anne UL; Palmisano, Flaviana UL

Scientific Conference (2015, July 15)

Detailed reference viewed: 160 (16 UL)
Full Text
Peer Reviewed
See detailDYNAMICS OF INDIVIDUAL INCOME RANK VOLATILITY: EVIDENCE FROM WEST GERMANY AND THE US
Chauvel, Louis UL; Hartung, Anne UL; Palmisano, Flaviana

in B.E. Journal of Economic Analysis and Policy (2019)

This paper presents a methodology for comparing income rank volatility profiles over time and across distributions. While most of the existing measures are affected by changes in marginal distributions ... [more ▼]

This paper presents a methodology for comparing income rank volatility profiles over time and across distributions. While most of the existing measures are affected by changes in marginal distributions, this paper proposes a framework that is based on individuals’ relative positions in the distribution, and is neutral in relation to structural changes that occur in the economy. Applying this approach to investigate rank volatility in Germany and the US over three decades, we show that while poorer individuals within both countries are the most volatile, the volatility trend for the middle class in each of these countries differs. [less ▲]

Detailed reference viewed: 169 (15 UL)