Results 1 to 10 of about 1,163,698 (170)

Formula one: best is no formula [PDF]

open access: yesEuropean Respiratory Journal, 2017
Breast is best; formula is worst: in between, there may be a typically British compromise!
Bush, A, Custovic, A
openaire   +3 more sources

Formulas! Formulas! Everywhere!

open access: yesOhio Journal of School Mathematics, 2022
This article describes activities that can be used to introduce the concepts of perimeter and area with conceptual understanding for students in grades 4 through 9. The transformations of reflection and rotation are used to build this understanding.
Todd O Moyer, R. Michael Krach
openaire   +1 more source

Theoretical Study of Dual-Core Photonic Crystal Fibers With Metal Wire

open access: yesIEEE Photonics Journal, 2012
In this paper, we, for the first time, systematically study a new structure of a dual-core photonic crystal fiber filled with a metal wire in the center air hole.
Shuyan Zhang   +6 more
doaj   +1 more source

Photonics Millimeter-Wave Generation in the E-Band and Bidirectional Transmission

open access: yesIEEE Photonics Journal, 2013
For the first time, we propose and experimentally demonstrate millimeter-wave (mm-wave) generation in the E-band (71-76 GHz and 81-86 GHz) based on photonics generation technique.
Xinying Li, Jianjun Yu, Ze Dong, Nan Chi
doaj   +1 more source

Hybrid SRRs Design and Fabrication for Broadband Terahertz Metamaterials

open access: yesIEEE Photonics Journal, 2012
Hybrid metamaterials comprising split-ring resonator (SRR) structures with different gap dimensions are fabricated on polyethylene naphthalate (PEN) films by parallel laser micro-lens array (MLA) lithography and a liftoff process. The unit cell of hybrid
Z. Y. Pan   +4 more
doaj   +1 more source

Impact of Detector Spatial Uniformity on the Measurement of Averaged LED Intensity

open access: yesIEEE Photonics Journal, 2014
Photometers are widely used for the measurement of the average LED intensity as defined by CIE 127, under the circumstance that LEDs have many kinds of intensity spatial distributions.
Jian Liu   +5 more
doaj   +1 more source

Spectral Dynamical Behavior in Passively Mode-Locked Semiconductor Lasers

open access: yesIEEE Photonics Journal, 2011
In this paper, we present an experimental and theoretical study of passive mode-locking in semiconductor Fabry-Pérot, quantum-well, lasers operating at around 1550 nm and producing picosecond pulses at a repetition frequency of 40 GHz.
P. M. Stolarz   +7 more
doaj   +1 more source

High-Quality Optical Frequency Comb by Spectral Slicing of Spectra Broadened by SPM

open access: yesIEEE Photonics Journal, 2013
This paper introduces a spectral slicing technique that extends the useful spectral range of frequency combs generated through self-phase modulation (SPM) of mode-locked laser pulses.
D. Hillerkuss   +11 more
doaj   +1 more source

Column Address Selection in Optical RAMs With Positive and Negative Logic Row Access

open access: yesIEEE Photonics Journal, 2013
An optical RAM row access gate followed by a column address selector for wavelength-division-multiplexing (WDM)-formatted words employing a single semiconductor optical amplifier-Mach-Zehnder interferometer (SOA-MZI) is presented.
C. Vagionas   +7 more
doaj   +1 more source

The Verlinde formula as fixed point formulas [PDF]

open access: yesJournal of Symplectic Geometry, 2001
Let \(M\) be a compact finite-dimensional Hamiltonian \(G\)-manifold with \(G\)-equivariant pre-quan\-tized line bundle \(L\). There is a Spin\(^c\)-Dirac operator \(\partial^L\). The \(G\)-equivariant index \(\text{Ind}_G \partial^L(M) \in R(G)\) can be computed from (1) the Atiyah-Segal-Singer theorem in terms of fixed points data, or (2) from the ...
Alekseev , A.   +2 more
openaire   +2 more sources

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