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 detailThe Scrutiny of Brexit in National Parliaments: Germany, Luxembourg and the Czech Republic Compared
Högenauer, Anna-Lena UL; Buth, Vanessa; Kaniok, Petr

in Christiansen, Thomas; Fromage, Diane (Eds.) Brexit and Democracy (2019)

The outcome of the Brexit referendum has led to a highly mediatized battle of power between the British government and parliament over how much influence the latter can exert over the British position in ... [more ▼]

The outcome of the Brexit referendum has led to a highly mediatized battle of power between the British government and parliament over how much influence the latter can exert over the British position in the negotiations with the European Union (EU). At the same time, the role of parliaments in the remaining member states has received virtually no public attention, despite the fact that the stakes are also high for their publics. The aim of our chapter is to shed light on dynamics of parliamentary control of Brexit in the remaining member states through a comparative study of the German, Czech and Luxembourgish parliaments. Each of these member states has one or several key interests at stake in the negotiations, such as exports, the financial sector and future contributions to the EU budget (Germany, Luxembourg), or migration to the UK and the maintenance of EU policies and their budgetary health (Czech Republic). The three cases represent geographical diversity and differently sized countries, to take into account different levels of governmental influence over the Brexit negotiations. The study will focus on the formal powers of parliaments, their actual mobilization and the key dynamics that mark their scrutiny of the Brexit negotiations. [less ▲]

Detailed reference viewed: 150 (3 UL)
Full Text
Peer Reviewed
See detailScrutiny or Complacency? Banking Union in the Bundestag and the Assemblée Nationale
Högenauer, Anna-Lena UL

in Politics and Governance (2021), 9(2), 219-229

Detailed reference viewed: 52 (4 UL)
Full Text
Peer Reviewed
See detailSCTL: A StateChart Transformation Language for Test Sets Reduction
Guelfi, Nicolas UL; Ries, Benoît UL

in ERCIM Workshop on Dependable Software Intensive Embedded Systems, workshop of the 31st EUROMICRO Conference on Software Engineering and Advanced Appli (2005)

Specification and testing activities are key phases in embedded systems development life cycles. In specification-based testing approaches, test cases are solely generated from the system specification ... [more ▼]

Specification and testing activities are key phases in embedded systems development life cycles. In specification-based testing approaches, test cases are solely generated from the system specification. Test cases are often too numerous to be executed exhaustively. In practice, test engineers often select test cases based on informal approximations. We aim at improving these activities by formulating abstraction hypotheses on system specifications, to reduce generated test sets. Our general application framework is the automotive industry, and we aim the specific domain of small-sized real-time embedded systems that must be highly reliable. The main result presented in this paper is a model transformation language that helps test engineers to select test cases based on system specifications. [less ▲]

Detailed reference viewed: 100 (6 UL)
Peer Reviewed
See detailSDG Lab: Young Entrepreneurs to Advance Local Economies and Community Health in Africa
Leist, Anja UL

Scientific Conference (2017, July)

Detailed reference viewed: 56 (0 UL)
Full Text
Peer Reviewed
See detailAn SDN Based Testbed for Dynamic Network Slicing in Satellite-Terrestrial Networks
Mendoza Montoya, Jesus Fabien; Minardi, Mario UL; Chatzinotas, Symeon UL et al

in IEEE MeditCom proceeding (2021)

6G networks are expected to meet ambitious perfor- mance parameters of coverage, data rates, latency, etc. To fulfill these objectives, the implementation of non-GEO satellite con- stellations is expected ... [more ▼]

6G networks are expected to meet ambitious perfor- mance parameters of coverage, data rates, latency, etc. To fulfill these objectives, the implementation of non-GEO satellite con- stellations is expected to improve coverage, capacity, resilience, etc. as well as the implementation of new advanced network virtualization algorithms in order to optimize network resources. However, the integration of these technologies represents new challenges, such as the execution of network slicing schemes in highly dynamic environments and network awareness require- ments. In this regard, Software Defined Networking (SDN) is seen as a required 6G technology enabler in order to provide better satellite-terrestrial integration approaches and Virtual Network (VN) implementation solutions. In this paper, we present an experimental testbed for non-GEO satellite constellations integration solution and VNE algorithms implementation adapted to highly variable network conditions that builds upon SDN. A laboratory testbed has been developed and validated, consisting in SDN-based satellite-terrestrial dynamic substrate network emulated in Mininet, a Ryu SDN controller with an End-to-End (E2E) Traffic Engineering (TE) application for the VNs estab- lishment and a Virtual Network Embedding (VNE) algorithm implemented in Matlab. [less ▲]

Detailed reference viewed: 71 (12 UL)
Full Text
Peer Reviewed
See detailSDN coordination for CCN and FC content dissemination in VANETs
Soua, Ridha UL; Kalogeiton, Eirini; Manzo, Gaetano et al

in Proceedings of the 8th International Conference on Ad Hoc Networks (ADHOCNETS), Ottawa, ON, Canada (2016, September 26)

Content dissemination in Vehicular Ad-hoc Networks has a myriad of applications, ranging from advertising and parking notifications, to traffic and emergency warnings. This heterogeneity requires ... [more ▼]

Content dissemination in Vehicular Ad-hoc Networks has a myriad of applications, ranging from advertising and parking notifications, to traffic and emergency warnings. This heterogeneity requires optimizing content storing, retrieval and forwarding among vehicles to deliver data with short latency and without jeopardizing network resources. In this paper, for a few reference scenarios, we illustrate how approaches that combine Content Centric Networking (CCN) and Floating Content (FC) enable new and efficient solutions to this issue. Moreover, we describe how a network architecture based on Software Defined Networking (SDN) can support both CCN and FC by coordinating distributed caching strategies, by optimizing the packet forwarding process and the availability of floating data items. For each scenario analyzed, we highlight the main research challenges open, and we describe a few possible solutions. [less ▲]

Detailed reference viewed: 246 (22 UL)
Full Text
Peer Reviewed
See detailSDN for Gateway Diversity Implementation in Satellite Networks
Minardi, Mario UL; Politis, Christos; Zimmer, Frank et al

in International Symposium on Networks, Computers and Communications (ISNCC), Dubai 31 Oct.-2 Nov. 2021 (2021, November)

Detailed reference viewed: 77 (19 UL)
Full Text
Peer Reviewed
See detailSDN-based Misbehavior Detection System for Vehicular Networks
Boualouache, Abdelwahab UL; Soua, Ridha UL; Engel, Thomas UL

in 2020 IEEE 91st Vehicular Technology Conference (VTC2020-Spring) (2020, May)

Vehicular networks are vulnerable to a variety of internal attacks. Misbehavior Detection Systems (MDS) are preferred over the cryptography solutions to detect such attacks. However, the existing ... [more ▼]

Vehicular networks are vulnerable to a variety of internal attacks. Misbehavior Detection Systems (MDS) are preferred over the cryptography solutions to detect such attacks. However, the existing misbehavior detection systems are static and do not adapt to the context of vehicles. To this end, we exploit the Software-Defined Networking (SDN) paradigm to propose a context-aware MDS. Based on the context, our proposed system can tune security parameters to provide accurate detection with low false positives. Our system is Sybil attack-resistant and compliant with vehicular privacy standards. The simulation results show that, under different contexts, our system provides a high detection ratio and low false positives compared to a static MDS. [less ▲]

Detailed reference viewed: 209 (27 UL)
Full Text
Peer Reviewed
See detailSDN-based Pseudonym-Changing Strategy for Privacy Preservation in Vehicular Networks
Boualouache, Abdelwahab UL; Soua, Ridha UL; Engel, Thomas UL

in 15th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob'19) (2019, October)

The pseudonym-changing approach is the de-factolocation privacy solution proposed by security standards toensure that drivers are not tracked during their journey. SeveralPseudonym Changing Strategies ... [more ▼]

The pseudonym-changing approach is the de-factolocation privacy solution proposed by security standards toensure that drivers are not tracked during their journey. SeveralPseudonym Changing Strategies (PCSs) have been proposed tosynchronize Pseudonym Changing Processes (PCPs) between con-nected vehicles. However, most of the existing strategies are static,rigid and do not adapt to the vehicles’ context. In this paper, weexploit the Software Defined Network (SDN) paradigm to proposea context-aware pseudonym changing strategy (SDN-PCS) whereSDN controllers orchestrate the dynamic update of the securityparameters of the PCS. Simulation results demonstrate that SDN-PCS strategy outperforms typical static PCSs to perform efficientPCPs and protect the location privacy of vehicular network users [less ▲]

Detailed reference viewed: 282 (74 UL)
Full Text
Peer Reviewed
See detailSDN-RADAR: Network troubleshooting combining user experience and SDN capabilities
Gheorghe, Gabriela UL; Avanesov, Tigran; Palattella, Maria Rita UL et al

in Proc. of IEEE Conf. on Network Softwarization (NetSoft) (2015, April)

Detailed reference viewed: 245 (11 UL)
Full Text
Peer Reviewed
See detailSDR Implementation of a Testbed for Real-Time Interference Detection with Signal Cancellation
Politis, Christos; Maleki, Sina UL; Merlano Duncan, Juan Carlos UL et al

in IEEE Access (2018)

Interference greatly affects the quality of service of wireless and satellite communications, having also a financial impact for the telecommunication operators. Therefore, as the interfering events ... [more ▼]

Interference greatly affects the quality of service of wireless and satellite communications, having also a financial impact for the telecommunication operators. Therefore, as the interfering events increase due to the deployment of new services, there is an increasing demand for the detection and mitigation of interference. There are several interference detectors in the literature, evaluated by using extensive simulations. However, this paper goes one step further, designing, implementing and evaluating the performance of the developed interference detection algorithms experimentally using a software defined radio, and particularly the universal software radio peripheral platform. A realistic communication system is implemented, consisting of a transmitter, a channel emulator and a receiver. Based on this system, we implement all the appropriate communications features such as pulse shaping, synchronization and demodulation. The real-time system implementation is validated and evaluated through signal and interference detection. We observe that the interference detection threshold is critical to the functioning of the system. Several existing interference detection techniques fail in practice due to this fact. In this paper, we propose a robust and practically implementable method the selection of threshold. Finally, we present real-time experimental results for the probabilities of false alarm and detection in order to verify the accuracy of our study and reinforce our theoretical analysis. [less ▲]

Detailed reference viewed: 248 (23 UL)
Full Text
Peer Reviewed
See detailSDR IMPLEMENTATION OF A TESTBED FOR SYNCHRONIZATION OF COHERENT DISTRIBUTED REMOTE SENSING SYSTEMS
Merlano Duncan, Juan Carlos UL; Querol, Jorge UL; Martinez Marrero, Liz UL et al

in Proceedings of IEEE International Geoscience and Remote Sensing Symposium 2020 (2020, September 26)

Remote Sensing from distributed platforms has become attractive for the community in the last years. Phase, frequency, and time synchronization are a crucial requirement for many such applications as ... [more ▼]

Remote Sensing from distributed platforms has become attractive for the community in the last years. Phase, frequency, and time synchronization are a crucial requirement for many such applications as multi-static remote sensing and also for distributed beamforming for communications. The literature on the field is extensive, and in some cases, the requirements an complexity of the proposed synchronization solution may surpass the ones set by the application itself. Moreover, the synchronization solution becomes even more challenging when the nodes are flying or hovering on aerial or space platforms. In this work, we discuss the synchronization considerations for the implementation of distributed remote sensing applications. The general framework considered is based on a distributed collection of autonomous nodes that synchronize their clocks with a common reference using inter-satellite links. For this purpose, we implement a synchronization link between two nodes operating in a full-duplex fashion. The experimental testbed uses commercially available SDR platforms to emulate two satellites, two targets, and the communication channel. The proposal is evaluated considering phase and frequency errors for different system parameters. [less ▲]

Detailed reference viewed: 87 (16 UL)
See detailSea-level rise studied in Chesapeake Bay as wetlands loss continues
Nerem, R. S.; Schenewerk, M.; van Dam, Tonie UL

in Earth in Space (1998), 10(12), 156-157

Detailed reference viewed: 40 (0 UL)