Results 101 to 110 of about 8,090 (214)

Gravity from a Particle Physicists' perspective

, 2009
In these lectures I review the status of gravity from the point of view of the gauge principle and renormalization, the main tools in the toolbox of theoretical particle physics.
Percacci, R.
core   +1 more source

Tuning Metamaterials for Applications at DUV Wavelengths

International Journal of Optics, 2012
The unique properties of metamaterials, namely, their negative refractive index, permittivity, or permeability, have gained much recent attention. Research into these materials has led to the realization of a host of applications that may be useful to ...
Andrew Estroff, Bruce W. Smith
doaj   +1 more source

Heteroepitaxial Growth of High-Quality and Crack-Free AlN Film on Sapphire Substrate with Nanometer-Scale-Thick AlN Nucleation Layer for AlGaN-Based Deep Ultraviolet Light-Emitting Diodes

Nanomaterials, 2019
High-quality and crack-free aluminum nitride (AlN) film on sapphire substrate is the foundation for high-efficiency aluminum gallium nitride (AlGaN)-based deep ultraviolet light-emitting diodes (DUV LEDs). We reported the growth of high-quality and crack-
Jie Zhao, Hongpo Hu, Yu Lei, Hui Wan, Liyan Gong, Shengjun Zhou   +5 more
doaj   +1 more source

Problems in extremal graph theory [PDF]

, 2010
We consider a variety of problems in extremal graph and set theory. The {\em chromatic number} of $G$, $\chi(G)$, is the smallest integer $k$ such that $G$ is $k$-colorable.
Ozkahya, Lale
core  

Average distance in a hierarchical scale-free network: an exact solution

, 2009
Various real systems simultaneously exhibit scale-free and hierarchical structure. In this paper, we study analytically average distance in a deterministic scale-free network with hierarchical organization.
Jihong Guan, Rozenfeld H D, Shuigeng Zhou, Shuyang Gao, Yuan Lin, Zhang Z Z, Zhang Z Z, Zhang Z Z, Zhang Z Z, Zhongzhi Zhang   +9 more
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Productivity Differences [PDF]

Many technologies used by the LDCs are developed in the OECD economies, and as such, are used to make optimal use of the skills of these richer countries' workforces.
Acemoglu, Daron, Zilibotti, Fabrizio
core   +1 more source

42.7 Gbit/s electro-optic modulator in silicon technology [PDF]

, 2011
Alloatti, L, Baets, Roel, Barklund, A, Bogaerts, Wim, Dinu, R, Dumon, Pieter, Fedeli, J, Fournier, M, Freude, W, Hillerkuss, D, Koos, C, Korn, D, Leuthold, J, Li, J, Palmer, R, Wieland, J, Yu, Hui   +16 more
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High-Performances AlGaN-based DUV-LED via Under-Level Multiple Quantum Well Configuration

Low internal and external quantum efficiencies in high Aluminium content AlGaN-based deep-ultraviolet light-emitting diode (DUV-LED) occurred due to strong polarization effects, spontaneous and piezoelectric polarization, at the interface between two materials.
Aman, Mohammad Amirul Hairol, Azrisham, Nurul Fathinah, Noorden, Ahmad Fakhrurrazi Ahmad, Danial, Wan Hazman, Kadir, Muhamad Zamzuri Abdul   +4 more
openaire   +2 more sources

Innovation height, spillovers and TFP growth at the firm level: Evidence from French manufacturing [PDF]

We examine the contribution of incremental and radical innovations to total factor productivity (TFP) growth at the firm level. The first part of our analysis is dedicated to the determinants of innovation and reveals two different innovation regimes. On
DUGUET Emmanuel
core  

Spherical vs. Plane Lenses for Enhanced DUV-LED Performance and Wine Aging

Applied Sciences
The strategic selection of lens geometry—spherical versus plane—decisively shapes the opto-thermal performance boundary of deep ultraviolet light-emitting diodes (DUV-LEDs), thereby governing their efficacy in application-specific photochemical processes.
Jichen Shen, Tianqi Wu, Jun Zou, Peng Wu, Yitao Liao   +4 more
doaj   +1 more source