Results 61 to 70 of about 37,907 (321)

Analogue model for quantum gravity phenomenology [PDF]

J.Phys. A39 (2006) 6807-6814, 2005
So called "analogue models" use condensed matter systems (typically hydrodynamic) to set up an "effective metric" and to model curved-space quantum field theory in a physical system where all the microscopic degrees of freedom are well understood. Known analogue models typically lead to massless minimally coupled scalar fields.
arxiv   +1 more source

CATALONIA IN OCCITANIA

Cuadernos Iberoamericanos, 2016
One of the main tendencies developing under the domination of great official languages and the international English is the resurrection of minor Roman languages, such as Occitan. The reason of their successful and increasing support by the local population is a psychological necessity to express, evolve and show their linguistic personality, to bring ...
openaire   +4 more sources

Gate‐Tunable Hole Transport in In‐Plane Ge Nanowires by V‐Groove Confined Selective Epitaxy

Advanced Functional Materials, EarlyView.
Ge nanowires are promising for hole spin‐based quantum processors, requiring direct integration onto Si wafers. This work introduces V‐groove‐confined selective epitaxy for in‐plane nanowire growth on Si. Structural and low‐temperature transport measurements confirm their high crystalline quality, gate‐tunable hole densities, and mobility.
Santhanu Panikar Ramanandan, Alban Morelle, Michele Masseroni, Shelly Ben‐David, Sara Martí‐Sánchez, Victor Boureau, Alok Rudra, Thomas Ihn, Jordi Arbiol, W. Craig Carter, Klaus Ensslin, Anna Fontcuberta i Morral   +11 more
wiley   +1 more source

Cage‐size effects on the encapsulation of P2 by fullerenes

Journal of Computational Chemistry, Volume 44, Issue 3, Page 268-277, January 30, 2023., 2023
Strategies to stabilize P2 avoiding its own dimerization involve transition metals and Lewis bases. Here, we show that the judicious selection of a fullerene size yields a stable endohedral with an intact triple bond. The thermodynamic, geometrical, and interaction consequences are discussed in light of DFT calculations.
Enric Sabater, Miquel Solà, Pedro Salvador, Diego M. Andrada   +3 more
wiley   +1 more source

Catalan Nationalism and Challenges to the Territorial Integrity of Spain

Сравнительная политика, 2016
At the beginning of the 21st century Spain faced a number of challenges, primarily the growth of separatist sentiments in the regions fraught with the danger of its fragmentation on ethno-national basis.
G. I. Volkova
doaj   +1 more source

Residual long-range pseudoscalar forces between unpolarised macroscopic bodies [PDF]

Phys.Lett.B328:98-102,1994, 1994
In this paper we survey the effects of residual long-range forces associated to $\gamma_5$-spin dependent-couplings of fermions to massless bosons exerted by unpolarised bulk matter over macroscopic distances. We establish that such forces with behaviour proportional to $R^{-6}$ do indeed exist.
arxiv   +1 more source

Leveraging Grain Boundary Effects for Nanostructured Electrode Layers in Symmetric Solid Oxide Fuel Cells

Advanced Materials Interfaces, EarlyView.
Nanocrystalline thin‐films of lanthanum chromite exhibit extraordinary properties of fast oxygen kinetics. These properties are due to the peculiar chemistry of grain boundaries and can be harnessed for fabricating symmetric electrochemical devices with self‐healing properties. Abstract While grain boundary engineering is attracting great interest as a
Federico Baiutti, Francesco Chiabrera, Marlene Anzengruber, Kosova Kreka, Juande Sirvent, Lluis Yedra, Fjorelo Buzi, Macej Oskar Liedke, Andrea Cavallaro, Albert Carmona Zuazo, Sonia Estradé, Maik Butterling, Eric Hirschmann, Andreas Wagner, Ainara Aguadero, Francisca Peiró, Albert Tarancon   +16 more
wiley   +1 more source

Coverage Contact Control of Benzoxazole‐Based SAMs to Enhance the Operational Performance of Perovskite Nanocrystal Light–Emitting Diodes

Advanced Materials Interfaces, EarlyView.
Self‐assembled monolayers (SAMs) as hole‐selective injecting contacts in CsPbBr₃ nanocrystal‐based PeLEDs demonstrate improved performance over PEDOT:PSS. Optimized SAM deposition techniques enable enhanced charge injection, resulting in PeLEDs with external quantum efficiencies (EQEs) up to 6.8% and increase of the operational stability.
Alexis Villanueva‐Antolí, Laia Marín‐Moncusí, Carlos E. Puerto‐Galvis, Rafael S. Sánchez, Jorge Simancas, Eva M. Barea, Jhonatan Rodriguez‐Pereira, Carina Pareja‐Rivera, Andrés F. Gualdrón‐Reyes, Emilio Palomares, Eugenia Martínez‐Ferrero, Iván Mora‐Seró   +11 more
wiley   +1 more source

Efficacy of biologics for alveolar ridge preservation/reconstruction and implant site development: An American Academy of Periodontology best evidence systematic review

Journal of Periodontology, Volume 93, Issue 12, Page 1827-1847, December 2022., 2022
Abstract Background The use of biologics may be indicated for alveolar ridge preservation (ARP) and reconstruction (ARR), and implant site development (ISD). The present systematic review aimed to analyze the effect of autologous blood‐derived products (ABPs), enamel matrix derivative (EMD), recombinant human platelet‐derived growth factor‐BB (rhPDGF ...
Fernando Suárez‐López del Amo, Alberto Monje   +1 more
wiley   +1 more source

The Catalan crisis 2012-2017: political, institutional and ethnopolitical aspects

Ибероамериканские тетради, 2019
The relevance of the study: attempts to secede of Catalonia from Spain in 2012–2017 are a characteristic manifestation of the crisis of the national states in the context of globalization.
A. V. Baranov
doaj   +1 more source