8,664 research outputs found
Generic approach for hierarchical modulation performance analysis: application to DVB-SH
Full text linkBroadcasting systems have to deal with channel diversity in order to offer the best rate to the users. Hierarchical
modulation is a practical solution to provide several rates in function of the channel quality. Unfortunately the performance evaluation of such modulations requires time consuming simulations. We propose in this paper a novel approach based on the channel capacity to avoid these simulations. The method allows to study the performance in terms of spectrum efficiency of hierarchical and also classical modulations combined with error correcting codes. Our method will be applied to the DVB-SH standard which considers hierarchical modulation as an optional feature
Combined multiphoton excitation and second harmonic generation for monitoring the structural changes of collagen
No full textGene ontology (GO) enrichment based on DEGs in B-SH-infected cells.
No full textThe DEGs in B-SH-infected cells matched various GO terms, including the most enriched biological process (BP) and molecular function (MF), as judged by their q-values.</p
Structural and dynamic basis of a supercoiling-responsive DNA element
No full textIn both eukaryotes and prokaryotes, negative supercoiling of chromosomal DNA acts locally to regulate a variety of cellular processes, such as transcription, replication, recombination and response to environmental stresses. While studying the interaction between the Hin recombinase and mutated versions of its cognate DNA-binding site, we identified a mutated DNA site that binds Hin only when the DNA is supercoiled. To understand the mechanism of this supercoiling-responsive DNA site, we used NMR spectroscopy and fluorescence resonance energy transfer to determine the solution structures and dynamics of three related DNA oligonucleotides. The supercoiling-responsive DNA site formed a partially unwound and stretched helix and showed significant flexibility and base pair opening kinetics. The single CAG/CTG triplet contained in this DNA sequence displayed the same characteristics as do multiple CAG/CTG repeats, which are associated with several hereditary neuromuscular diseases. It is known that short DNA sequence motifs that have either very high or low bending flexibility occur preferentially at supercoiling-sensitive bacterial and eukaryotic promoters. From our results and these previous data, we propose a model in which supercoiling utilizes the intrinsic flexibility of a short DNA site to switch the local DNA structure from an inefficient conformation for protein binding to an efficient one, or vice versa
The Foundation of Early Intervention Trans-Disciplinary Team Model for Children with Developmental Disability in Nantou County
No full textCombined second harmonic generation intensity measurement and imaging for monitoring the thermally induced structural transition of type I collagen
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SH-wave modeling of influence of local geological condition on strong ground motion
No full textIn this paper a hybrid method, based on mode summation and finite differences, is used to simulate the ground motion of SH wave in the Xiji-Langfu area of Beijing induced by the 1976 Tangshan earthquake. We estimate the maximum acceleration amplitude and total energy of ground motion for engineering purposes. On the two sides of the Xiadian fault the maximum acceleration amplitude and total energy can vary by afactor of 200% and 700% respectively. Our results can explain the observed anomalous intensity in the Xiji-Langfu area induced by the 1976 Tangshan earthquake
Wellesly Sh. W. to Mr. James Meredith (2 October 1962)
Full text linkSigned by Wellesly Sh. W.https://egrove.olemiss.edu/mercorr_pro/1531/thumbnail.jp
Outbreak of contact dermatitis related to acticide EP paste in a paint manufacturing factory
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