Generating a module

In recent years, optical orthogonal frequency division multiplexing (OOFDM) has emerged as a dominant research and development area in the field of high-speed optical communications. OFDM is a potential candidate as the most promising next-generation optical networks such as passive optical networks and optical transport networks, due to their simple configuration based on low cost, high speed data rates, high spectral efficiency, high quality of service and robustness against narrow band interference, frequency selective fading, and chromatic dispersion.

99p nguathienthan12 18-05-2021 21 7   Download

Many biological C-H activation reactions exhibit nonclassical kinetic isotope effects (KIEs). These nonclassical KIEs are too large (kH/kD 7) and/or exhibit unusual temperature dependence such that the Arrhenius prefactor KIEs (AH/AD) fall outside of the semiclassical range near unity. The focus of this minireview is to discuss such KIEs within the context of the environmentally coupled hydrogen tunneling model.

9p system191 01-06-2013 37 4   Download

Prolyl endopeptidase (PEP) is a proline-specific oligopepti-dase with a reported effect on learning and memory in dif-ferent rat model systems. Using the astroglioma cell line U343,PEP expression was reduced by an antisense technique. Measuring different second-messenger concen-trations revealed an inverse correlation between inositol 1,4,5-triphosphate [Ins(1,4,5)P3] concentration and PEP expression in the generated antisense cell lines. However,no effect on cAMP generation was observed.

8p tumor12 22-04-2013 41 3   Download

On chemokine stimulation, leucocytes produce and secrete proteolytic enzymes for innate immunedefencemechanisms. Some of these proteasesmodify the biological activity of the chemokines. For instance, neutrophils secrete gelatinase B (matrix metalloproteinase-9, MMP-9) and neutrophil col-lagenase (MMP-8) after stimulation with interleukin-8/ CXCL8 (IL-8). Gelatinase B cleaves and potentiates IL-8, generating a positive feedback.

11p tumor12 20-04-2013 69 4   Download

Over several years, we have developed an approach to spoken dialogue systems that includes rule-based and trainable dialogue managers, spoken language understanding and generation modules, and a comprehensive dialogue system architecture. We present a Reinforcement Learning-based dialogue system that goes beyond standard rule-based models and computes on-line decisions of the best dialogue moves. The key concept of this work is that we bridge the gap between manually written dialog models (e.g.

4p hongphan_1 15-04-2013 75 4   Download

Many pharmacologically important agents are assembled on multimodular nonribosomal peptide synthetases (NRPSs) whose modules comprise a set of core domains with all essential catalytic functions necessary for the incorporation and modification of one building block. Very often, d-amino acids are found in such products which, with few exceptions, are generated by the action of NRPS integrated epimerization (E) domains that alter the stereochemistry of the corresponding peptidyl carrier protein (PCP) bound l-intermediate....

15p fptmusic 12-04-2013 30 2   Download

TRPM4b is a Ca 2+ -activated, voltage-dependent monovalent cation chan-nel that has been shown to act as a negative regulator of Ca 2+ entry and to be involved in the generation of oscillations of Ca 2+ influx in Jurkat T-lymphocytes. Transient overexpression of TRPM4b as an enhanced green fluorescence fusion protein in human embryonic kidney (HEK) cells resulted in its localization in the plasma membrane, as demonstrated by confocal fluorescence microscopy.

10p galaxyss3 21-03-2013 34 3   Download

Hfq is an RNA chaperone that functions as a pleiotropic regulator for RNA metabolism in bacteria. In several pathogenic bacteria, Hfq contrib-utes indirectly to virulence by binding to riboregulators that modulate the stability or translation efficiency of RNA transcripts. To characterize the role of Hfq in the pathogenicity ofNeisseria gonorrhoeae, we generated an N. gonorrhoeae hfqmutant.

14p viettel02 20-02-2013 35 3   Download

Tuyển tập các báo cáo nghiên cứu khoa học về toán học trên tạp chí toán học quốc tế đề tài: On the Sn-modules generated by partitions of a given shape...

12p thulanh6 17-09-2011 53 4   Download