Hasil untuk "q-bio.SC"

F. H. Jackson

S. Cohn

M. Dewood, W. F. Stifter, C. S. Simpson et al.

John J. Degnan

J. Enríquez, G. Lenaz

J. Zhou, Q. Wang, Q. Sun et al.

C. Quinzii, M. Hirano

Wilbur G. Lewellen, S. Badrinath

M. Notomi, E. Kuramochi, H. Taniyama

Recently, various wavelength-sized cavities with theoretical Q values of approximately 10(8) have been reported, however, they all employ 2D or 3D photonic band gaps to realize strong light confinement. Here we numerically demonstrate that ultrahigh-Q (2.0x10(8)) and wavelength-sized (V(eff) approximately 1.4(lambda/n)3) cavities can be achieved by employing only 1D periodicity.

S. More, J. Stegeman, A. Rodolakis et al.

Martin A. M. Reijns, Ross D. Alexander, M. P. Spiller et al.

P-bodies are cytoplasmic foci that are sites of mRNA degradation and translational repression. It is not known what causes the accumulation of RNA-degradation factors in P-bodies, although RNA is required. The yeast Lsm1-7p complex (comprising Lsm1p to Lsm7p) is recruited to P-bodies under certain stress conditions. It is required for efficient decapping and degradation of mRNAs, but not for the assembly of P-bodies. Here we show that the Lsm4p subunit and its asparagine-rich C-terminus are prone to aggregation, and that this tendency to aggregate promotes efficient accumulation of Lsm1-7p in P-bodies. The presence of glutamine- and/or asparagine-rich (Q/N-rich) regions in other P-body components suggests a more general role for aggregation-prone residues in P-body localization and assembly. This is supported by reduced P-body accumulation of Ccr4p, Pop2p and Dhh1p after deletion of these domains, and by the observed aggregation of the Q/N-rich region from Ccr4p.

Taekyun Kim

A. Aral, Vijay Gupta

In the present paper we propose a generalization of the Baskakov operators, based on q integers. We also estimate the rate of convergence in the weighted norm. In the last section, we study some shape preserving properties and the property of monotonicity of q-Baskakov operators.

P. Robbins, R. Krueger

R. Dasgupta, R. Clark

Yoshinori Tanaka, J. Upham, T. Nagashima et al.

L. Czarnecki

Z. Woldehiwet

T. Asano, B. Song, S. Noda

In this letter, we show that the Q factors of the latest high-Q cavities in two dimensional photonic crystals, measured experimentally to be ~1000000, are determined by losses due to imperfections in the fabricated structures, and not by the cavity design. Quantitative analysis shows that the dominant sources of loss include the tilt of air-holes within the cavity, the roughness of the inner walls of the air-holes, variation in the radii of the air-holes, and optical absorption by adsorbed material. We believe that cavities with experimental Q factors of the order of several millions will be obtained in the future by reducing the losses due to imperfections through improved fabrication techniques.

S. Murphy