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See detailTuning the spectral sensitivity of vertical InN nanopyramid based photodetectors by means of band gap engineering and/or nanostructure size control
Trellenkamp, Stefan; Mikulics, Martin; Winden, Andreas et al

in ASDAM 2012, The Ninth International Conference on Advanced Semiconductor Devices and Microsystems (2012)

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See detailTuning the work function of stepped metal surfaces by adsorption of organic molecules
Jiang, Yingda; Li, Jingtai; Su, Guirong et al

in Journal of Physics : Condensed Matter (2017), 29

Understanding the binding mechanisms for aromatic molecules on transition-metal surfaces, especially with defects such as vacancies, steps and kinks, is a major challenge in designing functional ... [more ▼]

Understanding the binding mechanisms for aromatic molecules on transition-metal surfaces, especially with defects such as vacancies, steps and kinks, is a major challenge in designing functional interfaces for organic devices. One important parameter in the performance of organic/inorganic devices is the barrier of charge carrier injection. In the case of a metallic electrode, tuning the electronic interface potential or the work function for electronic level alignment is crucial. Here, we use density-functional theory (DFT) calculations with van der Waals (vdW) interactions treated with both screened pairwise (vdWsurf) and many-body dispersion (MBD) methods, to systematically study the interactions of benzene with a variety of stepped surfaces. Our calculations confirm the physisorptive character of Ag(2 1 1), Ag(5 3 3), Ag(3 2 2), Ag(7 5 5) and Ag(5 4 4) surfaces upon the adsorption of benzene. The MBD effects reduce the adsorption energies by about 0.15 eV per molecule compared to the results from the DFT + vdWsurf method. In addition, we find that the higher the step density, the larger the reduction of the work function upon the adsorption of benzene. We also study the effect of vdW interactions on the electronic structure using a fully selfconsistent implementation of the vdWsurf method in the Kohn–Sham DFT framework. We find that the self-consistent vdWsurf effects increase the work function due to the lowered Fermi level and the increased vacuum level. As a result, the benzene/Ag(2 1 1) system has the lowest work function (3.67 eV) among the five adsorption systems, significantly smaller than the work function of the clean Ag(1 1 1) surface (4.74 eV). Our results provide important insights into the stability and electronic properties of molecules adsorbed on stepped metal surfaces, which could help in designing more appropriate interfaces with low work functions for electron transfer. [less ▲]

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See detailTunneling between helical Majorana modes and helical Luttinger liquids
Chao, Sung-Po; Schmidt, Thomas UL; Chung, Chung-Hou

in Physical Review B (2015), 91

We propose and study the charge transport through single and double quantum point contacts setup between helical Majorana modes and an interacting helical Luttinger liquid. We show that the differential ... [more ▼]

We propose and study the charge transport through single and double quantum point contacts setup between helical Majorana modes and an interacting helical Luttinger liquid. We show that the differential conductance decreases for stronger repulsive interactions and that the point contacts become insulating above a critical interaction strength. For a single-point contact, the differential conductance as a function of bias voltage shows a series of peaks due to Andreev reflection of electrons in the Majorana modes. In the case of two point contacts, interference phenomena make the structure of the individual resonance peaks less universal and show modulations with different separation distance between the contacts. For small separation distance, the overall features remain similar to the case of a single-point contact. [less ▲]

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See detailTunneling Conductivity in Composites of Attractive Colloids
Nigro, Biagio; Grimaldi, Claudio; Miller, M.A. et al

in Journal of Chemical Physics (2012), 136(164903), 1-5

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See detailTurbo Decoding: Why Stopping Criteria do Work
Heim, Axel; Sorger, Ulrich UL

in Proc. 5th International Symposium on Turbo Codes & Related Topics (2008)

The convergence of iterative decoding schemes is considered. The class of dually coupled codes is recalled, being a super class to both Turbo and LDPC codes. It is proven that the output L-values of a ... [more ▼]

The convergence of iterative decoding schemes is considered. The class of dually coupled codes is recalled, being a super class to both Turbo and LDPC codes. It is proven that the output L-values of a Turbo decoder cannot grow to in?nity, while those of an LDPC decoder can. Finally, a new decoder parameter is introduced by which the convergence behavior can be controlled. [less ▲]

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See detailTurkish Immigration Politics and the Syrian Refugee Crisis
Hoffmann, Sophia; Samuk, Sahizer UL

E-print/Working paper (2016)

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See detailTurn up the heat: circulating serotonin tunes our internal heating system.
Schneider, Jochen UL; Nadeau, Joseph H.

in Cell metabolism (2015), 21(2), 156-8

Serotonin acts as neurotransmitter in the brain and as a multifaceted signaling molecule coordinating many physiological processes in the periphery. In a recent issue of Nature Medicine, Crane et al ... [more ▼]

Serotonin acts as neurotransmitter in the brain and as a multifaceted signaling molecule coordinating many physiological processes in the periphery. In a recent issue of Nature Medicine, Crane et al. (2014) find that peripheral serotonin controls thermogenesis in adipose tissue by modulating beta-adrenergic stimulation of UCP-1, thereby affecting glucose homeostasis and weight gain. [less ▲]

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See detailTurning again? Kritische Bestandsaufnahmen zu einer neuerlichen "Wende" in der sozialpädagogischen Forschung
Neumann, Sascha UL; Sandermann, Philipp

in Neumann, Sascha; Sandermann, Philipp (Eds.) Kultur und Bildung. Neue Fluchtpunkte für die sozialpädagogische Forschung? (2009)

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See detailTurnover Taxes Under State Aid Spotlight
Sinnig, Julia UL

in European Taxation (2019), 59(2/3),

In response to the Commission’s increasingly broad interpretation of State aid rules with regard to national retail and advertising taxes, in the ANGED cases, the ECJ developed its Distribution Casino ... [more ▼]

In response to the Commission’s increasingly broad interpretation of State aid rules with regard to national retail and advertising taxes, in the ANGED cases, the ECJ developed its Distribution Casino France case law, applying a restrictive view of the qualification of these taxes as illegal State aid. This article provides an overview of the relevant legal questions raised in the ANGED cases, as well as in the Polish and Hungarian retail sales and advertisement tax cases. [less ▲]

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See detailTussen isolement en verbondenheid. Bij wijze van inleiding
Levering, B.; Biesta, Gert UL; Weijers, I.

in Levering, B.; Biesta, Gert; Weijers, I. (Eds.) Thema's uit de wijsgerige en historische pedagogiek (1998)

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See detailTutela del lavoro e libertà d'impresa alla prova del diritto europeo
Ratti, Luca UL

in Il Lavoro nella Giurisprudenza (2017)

Detailed reference viewed: 62 (7 UL)
See detailTutorat: l'acte formatif
Weber, Jean-Marie UL

in Transfert Journal semestriel de la Formation Pédagogique des Enseignants- Stagiaires (2012), 1

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See detailTutorial Big Data Analytics: Overview and Practical Examples
Varrette, Sébastien UL

Report (2018)

This tutorial will offer a synthetic view of Big Data Analytics challenges, the tools permitting to address these challenges and focus on one of these tool through a practical session with a set of ... [more ▼]

This tutorial will offer a synthetic view of Big Data Analytics challenges, the tools permitting to address these challenges and focus on one of these tool through a practical session with a set of concrete examples. Level: beginner - advanced [less ▲]

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