Results 11 to 20 of about 59,853 (261)
Photonics, 2022 This paper carries out a numerical simulation investigating three different modulation formats: carrier suppressed return to zero (CSRZ), modified duobinary return to zero (MDRZ) and return to zero (RZ).
Naif Alsowaidi +2 more
doaj +1 more source
Mitigation of Fiber Nonlinearity Effects in Ultra High-Dense WDM System by Using Fractional Fourier Transform for 32 Channel System [PDF]
Engineering and Technology Journal, 2016 The optical signal is severely degraded when transmitted in the fiber due to both the linear and nonlinear distortions. It is well known that, the linear distortions in single mode fiber include chromatic dispersion (CD) and polarization-mode dispersion (
Ali Y. Fattah, Saif Hussam Abdul-Wahed
doaj +1 more source
MZM Optimization of PAM-4 Transmission in Data Center Interconnect
Applied Sciences, 2019 An analog optimization of 4-level pulse amplitude modulation (PAM-4) signal is proposed, together with maximum likelihood sequence estimation digital signal processing.
Eduard Sonkin, Dan Sadot, Gilad Katz
doaj +1 more source
VEGF modulates early heart valve formation [PDF]
The Anatomical Record Part A: Discoveries in Molecular, Cellular, and Evolutionary Biology, 2003 AbstractAlthough hypoxic and/or nutritional insults during gestation are believed to contribute to congenital heart defects, the mechanisms responsible for these anomalies are not understood. Given the role vascular endothelial growth factor (VEGF) plays in response to hypoxia, it is a likely candidate for mediating deleterious effects of embryonic ...
Yuval, Dor +4 more
openaire +2 more sources
IEEE Photonics Journal, 2021 We propose a graph-based modulation format identification (MFI) scheme for elastic optical network (EON), which exploits the trajectory information of the adjacent received symbols to identify six commonly-used modulation formats signals.
Lishan Yang +8 more
doaj +1 more source
Statins as modulators of bone formation [PDF]
Arthritis Research & Therapy, 2002 The use of 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitors (statins) to reduce serum cholesterol is well described. However, the recent finding that statins have direct effects on bone was unexpected. A number of epidemiological studies have recently been published that explore the effects of statins on bone mineral density and risk of ...
Edwards, C J, Spector, T D
openaire +3 more sources
Recording beam modulation during grating formation [PDF]
Applied Optics, 2005 Holography has been of increasing interest in recent years, with developments in many areas such as data storage and metrology. Photopolymer materials provide potentially good materials for holographic recording, as they are inexpensive and self-processing.
Gleeson, M. R. +3 more
openaire +4 more sources
Modulators of urinary stone formation
Frontiers in Bioscience, 2004 Urine contains compounds that modulate the nucleation, growth and aggregation of crystals as well as their attachment to renal epithelial cells. These compounds may function to protect the kidneys against: 1, the possibility of crystallization in tubular fluid and urine, which are generally metastable with respect to calcium salts, 2, crystal retention
Saeed R, Khan, Dirk J, Kok
openaire +4 more sources
A Novel Four-Dimensional Modulation Format Based on Subset Selection
IEEE Access, 2019 Coherent optical transmission systems have a four-dimensional (4-D) signal space (two quadratures in two polarizations), which can be used to create 4-D modulation formats that have better sensitivity than traditional two-dimensional modulation signal ...
Guijun Hu, Zhaoxi Li
doaj +1 more source
Cadmium Modulates Biofilm Formation by Staphylococcus epidermidis [PDF]
International Journal of Environmental Research and Public Health, 2015 The aim of the study was to evaluate the effect of cadmium exposure on Staphylococcus epidermidis (ATCC 35984) biofilm formation. Bacteria were cultured in the absence or presence of different concentrations (0–50 µM) of cadmium. Biofilm formation and bacterial viability were assessed. Quantitative Real Time-PCR (qRT-PCR) was used to determine the mRNA
Wu, Xueqing +2 more
openaire +4 more sources