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See detailSimultaneous Sensing and Transmission for Cognitive Radios with Imperfect Signal Cancellation
Politis, Christos UL; Maleki, Sina UL; Tsinos, Christos UL et al

in IEEE Transactions on Wireless Communications (2017)

In conventional cognitive radio systems, the secondary user employs a “listen-before-talk” paradigm, where it senses if the primary user is active or idle, before it decides to access the licensed ... [more ▼]

In conventional cognitive radio systems, the secondary user employs a “listen-before-talk” paradigm, where it senses if the primary user is active or idle, before it decides to access the licensed spectrum. However, this method faces challenges with the most important being the reduction of the secondary user’s throughput, as no data transmission takes place during the sensing period. In this context, the idea of simultaneous spectrum sensing and data transmission is proposed. The present work studies a system model where this concept is obtained through the collaboration of the secondary transmitter with the secondary receiver. First, the secondary receiver decodes the signal from the secondary transmitter, subsequently, removes it from the total received signal and then, carries out spectrum sensing in the remaining signal in order to decide about the presence/absence of the primary user. Different from the existing literature, this paper takes into account the imperfect signal cancellation, evaluating how the decoding errors affect the sensing reliability and derives the analytical expressions for the probability of false alarm. Finally, numerical results are presented illustrating the accuracy of the proposed analysis. [less ▲]

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See detailSimultaneous State and False-Data Injection Attacks Reconstruction for NonLinear Systems: an LPV Approach
Bezzaoucha, Souad UL; Voos, Holger UL

in Bezzaoucha, Souad (Ed.) International Conference on Automation, Control and Robots (2019, October)

The present contribution addresses simultaneous state and actuator/sensor false-data injection attacks reconstruction for nonlinear systems. The considered actuator/sensor attacks are modeled as time ... [more ▼]

The present contribution addresses simultaneous state and actuator/sensor false-data injection attacks reconstruction for nonlinear systems. The considered actuator/sensor attacks are modeled as time-varying parameters with a multiplicative effect on the actuator input signal and the sensor output signal, respectively. Based on the sector non-linearity approach and the convex polytopic transformation, the nonlinear model is written in a Linear Parameter-Varying (LPV) form, then an observer allowing both state and attack reconstruction is designed by solving an LMI optimization problem. [less ▲]

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See detailSimultaneous Wireless Information and Power Transfer (SWIPT): Recent Advances and Future Challenges
Perera, T. D. Ponnimbaduge; Jayakody, Dushantha Nalin; Sharma, Shree Krishna UL et al

in IEEE Communications Surveys and Tutorials (2018), 20(1), 264-302

Initial efforts on wireless power transfer (WPT) have concentrated toward long-distance transmission and high power applications. Nonetheless, the lower achievable transmission efficiency and potential ... [more ▼]

Initial efforts on wireless power transfer (WPT) have concentrated toward long-distance transmission and high power applications. Nonetheless, the lower achievable transmission efficiency and potential health concerns arising due to high power applications, have caused limitations in their further developments. Due to tremendous energy consumption growth with ever-increasing connected devices, alternative wireless information and power transfer techniques have been important not only for theoretical research but also for the operational costs saving and for the sustainable growth of wireless communications. In this regard, radio frequency energy harvesting (RF-EH) for a wireless communications system presents a new paradigm that allows wireless nodes to recharge their batteries from the RF signals instead of fixed power grids and the traditional energy sources. In this approach, the RF energy is harvested from ambient electromagnetic sources or from the sources that directionally transmit RF energy for EH purposes. Notable research activities and major advances have occurred over the last decade in this direction. Thus, this paper provides a comprehensive survey of the state-of-art techniques, based on advances and open issues presented by simultaneous wireless information and power transfer (SWIPT) and WPT assisted technologies. More specifically, in contrast to the existing works, this paper identifies and provides a detailed description of various potential emerging technologies for the fifth generation communications with SWIPT/WPT. Moreover, we provide some interesting research challenges and recommendations with the objective of stimulating future research in this emerging domain. [less ▲]

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See detailSimultaneous Wireless Information and Power Transfer in UDN with Caching Architecture
Gautam, Sumit UL; Vu, Thang Xuan UL; Chatzinotas, Symeon UL et al

in Duong, Trung; Chu, Xiaoli; Suraweera, Himal (Eds.) Ultra-Dense Networks for 5G and Beyond - Modelling, Analysis, and Applications (2019)

In this chapter, we investigate the performance of a time-switching (TS) based energy harvesting model for cache-assisted simultaneous wireless transmission of information and energy (Wi-TIE). In the ... [more ▼]

In this chapter, we investigate the performance of a time-switching (TS) based energy harvesting model for cache-assisted simultaneous wireless transmission of information and energy (Wi-TIE). In the considered system, a relay which is equipped with both caching and energy harvesting capabilities helps a source to convey information to a destination. Based on the time-splitting mechanism, we analyze the effect of caching on the system performance in terms of stored energy at the relay and the relay-destination link throughput. In particular, two optimization problems are formulated to maximize the energy stored at the relay and the relay-destination throughput. By using KKT method, closed-form solution are obtained for both the problems. Finally, the performance of the proposed design under various operating conditions and parameter values is illustrated using numerical results. [less ▲]

Detailed reference viewed: 146 (33 UL)
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See detailSind Emotionen im Leistungssport hinderlich?
Steffgen, Georges UL

Article for general public (1990)

Detailed reference viewed: 14 (2 UL)
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See detailSind gemeinsame Therapieangebote für Partydrogen- und Cannabiskonsumenten sinnvoll? Ergebnisse zum stationären Behandlungsangebot des "Bonner Modells - Junge Sucht"
Dau, Wolfgang; Schmidt, Axel; Schmidt, Alexander F. UL et al

in Sucht (2009), 55

Fragestellung: Krankenhausabteilungen und psychiatrische Versorgungskliniken im Bereich der suchtmedizinischen Erwachsenenpsychiatrie werden, entsprechend dem allgemein steigenden Behandlungsbedarf ... [more ▼]

Fragestellung: Krankenhausabteilungen und psychiatrische Versorgungskliniken im Bereich der suchtmedizinischen Erwachsenenpsychiatrie werden, entsprechend dem allgemein steigenden Behandlungsbedarf, zunehmend auch mit dem Problem des exzessiven Konsums von Cannabis und Partydrogen konfrontiert. Gleichzeitig besteht ein Mangel an überprüften therapeutischen Konzepten. Es wurde daher ein speziell für junge Erwachsene mit Cannabis-/Partydrogenkonsum entwickeltes stationäres Behandlungsprogramm untersucht. Insbesondere wurde der Frage nach Gemeinsamkeiten und Unterschieden der Konsumentengruppe nachgegangen, sowie überprüft, ob ein gemeinsames Behandlungsangebot sinnvoll ist. Methodik: Untersucht wurden soziodemographische und klinische Merkmale von Pat. mit problematischen Partydrogen- und Cannabiskonsum (n1 = 27, n2 = 69), die im Zeitraum vom 01.06.2005 bis 01.06.2008 in unserer Einrichtung stationär behandelt wurden. Die Symptombelastungen wurden mittels Selbstbeurteilungsskalen sowie eines semistrukturierten Interviews zu Beginn und zum Ende der stationären Behandlung erfasst und über Gruppenvergleiche ausgewertet. Ergebnisse: Es ergeben sich zu beiden Messzeitpunkten keinerlei signifikante Gruppenunterschiede bei den substanzbezogenen und psychischen Merkmalen. Angst und interpersonale Probleme stellen die größten Belastungsfaktoren dar. Insgesamt ergeben sich für allgemeine psychische Faktoren höhere Belastungen als für substanzbezogene. Beide Gruppen profitieren in hohem Ausmaß von der stationären Behandlung. Es ergeben sich über alle untersuchten abhängigen Variablen hohe Effektstärken. Schlussfolgerungen: Gemeinsame Behandlungsangebote für Partydrogen- und Cannabiskonsumenten sind sinnvoll. Komorbide psychische Störungen, insbesondere Angststörungen und interpersonale Probleme sollten bei der Behandlungsplanung berücksichtigt werden. [less ▲]

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See detailSind Kinder Subjekte? Keys doppelte Erbschaft in der Kindheitsforschung
Honig, Michael-Sebastian UL

in Baader, Meike Sophia; Jacobi, Juliane; Andresen, Sabine (Eds.) Ellen Keys reformpädagogische Vision. "Das Jahrhundert des Kindes" und seine Wirkung (2000)

Detailed reference viewed: 56 (1 UL)
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See detailSind Lernstrategien im Sport kontextspezifisch?
Bund, Andreas UL

Scientific Conference (2007, February)

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See detailSind wir fur zukunftige Schwerefeldmissionen gerüstet?
Weigelt, Matthias UL

Presentation (2012, April)

Detailed reference viewed: 17 (1 UL)
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See detail«La sindrome dell'eco-lalia»
Roelens, Nathalie UL

in Restant (1989)

Detailed reference viewed: 45 (1 UL)
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See detailSing and Dance!
van der Torre, Leon UL; Parent, Xavier UL

in Sing and Dance! (2014)

Makinson and van der Torre [13] introduce a number of input/output (I/O) logics to reason about conditional norms. The key idea is to make obligations relative to a given set of conditional norms. The ... [more ▼]

Makinson and van der Torre [13] introduce a number of input/output (I/O) logics to reason about conditional norms. The key idea is to make obligations relative to a given set of conditional norms. The meaning of the normative concepts is, then, given in terms of a set of procedures yielding outputs for inputs. Using the same methodology, Stolpe[19,20] has developed some more I/O logics to include systems without the rule of weakening of the output (or principle of inheritance). We extend Stolpe’s account in two directions. First, we show how to make it support reasoning by cases−a common form of reasoning. Second, we show how to inject a new (as we call it, “aggregative”) form of cumulative transitivity, which we think is more suitable for normative reasoning. The main outcomes of the paper are soundness and completeness theorems for the proposed systems with respect to their intended semantics. [less ▲]

Detailed reference viewed: 86 (5 UL)
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See detailSing and Dance!" - Input/Output Logics without Weakening
Parent, Xavier UL; Torre, Leendert W. N. Van Der

in Deontic Logic and Normative Systems - 12th International Conference DEON 2014, Ghent, Belgium, July 12-15, 2014. Proceedings (2014)

Makinson and van der Torre [14] introduce a number of in- put/output (I/O) logics to reason about conditional norms. The key idea is to make obligations relative to a given set of conditional norms. The ... [more ▼]

Makinson and van der Torre [14] introduce a number of in- put/output (I/O) logics to reason about conditional norms. The key idea is to make obligations relative to a given set of conditional norms. The meaning of the normative concepts is, then, given in terms of a set of procedures yielding outputs for inputs. Using the same methodology, Stolpe [20,21] has developed some more I/O logics to include systems without the rule of weakening of the output (or principle of inheritance). We extend Stolpe’s account in two directions. First, we show how to make it support reasoning by cases−a common form of reasoning. Sec- ond, we show how to inject a new (as we call it, “aggregative”) form of cumulative transitivity, which we think is more suitable for normative reasoning. The main outcomes of the paper are soundness and complete- ness theorems for the proposed systems with respect to their intended semantics. [less ▲]

Detailed reference viewed: 108 (8 UL)
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See detailSinging is the first thing that came into my head: Emotions and language maintenance among Filipino migrants in New Zealand
De Bres, Julia UL

in Marra, Meredith; Warren, Paul (Eds.) Linguist at Work. Festschrift for Janet Holmes (2017)

Detailed reference viewed: 72 (4 UL)
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See detailA single amino acid substitution (Trp(666)-->Ala) in the interbox1/2 region of the interleukin-6 signal transducer gp130 abrogates binding of JAK1, and dominantly impairs signal transduction
Haan, Claude UL; Hermanns, H. M.; Heinrich, P. C. et al

in Biochemical Journal (2001), 349(Pt 1), 261-6

gp130 is the common signal-transducing receptor chain of interleukin (IL)-6-type cytokines. Here we describe, for the first time, a single amino acid substitution (Trp(666)-->Ala) in the membrane-proximal ... [more ▼]

gp130 is the common signal-transducing receptor chain of interleukin (IL)-6-type cytokines. Here we describe, for the first time, a single amino acid substitution (Trp(666)-->Ala) in the membrane-proximal interbox1/2 region that abrogates activation of STAT (signal transducer and activator of transcription) transcription factors and the proliferative response of pro-B-cell transfectants. Moreover, association of the Janus kinase JAK1 is prevented. No signalling of heterodimeric IL-5 receptor (IL-5R)/gp130 chimaeras occurs in COS-7 cells, even when only a single cytoplasmic chain of a gp130 dimer contains the Trp(666)Ala mutation, indicating that it acts dominantly. [less ▲]

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See detailSingle and Multiobjective Evolutionary Algorithms for Clustering Biomedical Information with Unknown Number of Clusters
Curi, María Eugenia; Carozzi, Lucía; Massobrio, Renzo et al

in Bioinspired Optimization Methods and Their Applications (2018)

This article presents single and multiobjective evolutionary approaches for solving the clustering problem with unknown number of clusters. Simple and ad-hoc operators are proposed, aiming to keep the ... [more ▼]

This article presents single and multiobjective evolutionary approaches for solving the clustering problem with unknown number of clusters. Simple and ad-hoc operators are proposed, aiming to keep the evolutionary search as simple as possible in order to scale up for solving large instances. The experimental evaluation is performed considering a set of real problem instances, including a real-life problem of analyzing biomedical information in the Parkinson's disease map project. The main results demonstrate that the proposed evolutionary approaches are able to compute accurate trade-off solutions and efficiently handle the problem instance involving biomedical information. [less ▲]

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See detailSingle crystal growth of BaZrO3 from the melt at 2700 degrees C using optical floating zone technique and growth prospects from BaB2O4 flux at 1350 degrees C
Xin, Cong; Veber, Philippe; Guennou, Mael UL et al

in CRYSTENGCOMM (2019), 21(3), 502-512

We report the growth of BaZrO3 single crystals by the optical floating zone technique and the investigation on its flux growth using BaB2O4 as a solvent. 6 mm long colorless and transparent single ... [more ▼]

We report the growth of BaZrO3 single crystals by the optical floating zone technique and the investigation on its flux growth using BaB2O4 as a solvent. 6 mm long colorless and transparent single crystals were obtained with a mirror furnace without the need for post-treatment annealing. Its properties are determined and compared with those of two commercial crystals grown by the tri-arc Czochralski method. The chemical composition was investigated using glow discharge mass spectrometry (GDMS) and secondary ion mass spectrometry (SIMS), which indicate minor impurities of Sr, Hf, Ca and Ti, with maximal concentrations for Sr and Hf in the range of 0.3-0.5 at. The optical band gap determined by UV-visible spectroscopy is found to be similar to 4.8 eV and indicates the high quality of the BaZrO3 crystals grown by the optical floating zone technique. Raman spectroscopy at ambient conditions and at low temperatures down to 4.2 K reveals a relatively sharp second-order spectrum and does not reveal any structural phase transition. Prospective high-temperature solution growth using BaB2O4 self-flux was investigated and led to 150-200 mu m BaZrO3 crystals. This solvent opens the way to grow BaZrO3 at half its melting point by the flux method. [less ▲]

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See detailSingle crystalline cylindrical nanowires – toward dense 3D arrays of magnetic vortices
Ivanov, Yurii P.; Chuvilin, Andrey; Gonzalez Vivas, Laura UL et al

in Scientific Reports (2016), 6

Detailed reference viewed: 88 (1 UL)
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See detailSingle electron effects in strongly interacting mesoscopic systems: Non-equilibrium bosonization approach
Idrisov, Edvin UL

Book published by LAP LAMBERT Academic Publishing (2020)

Detailed reference viewed: 13 (0 UL)
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See detailSingle Point Stochastic Search Algorithms for the Multi Level Lot Sizing Problem
Jeunet, Jully; Jonard, Nicolas UL

in Computers and Operations Research (2005), 32

Detailed reference viewed: 155 (4 UL)