Haldane conjectures the fundamental difference in energy spectrum of Heisenberg antiferromagnetic (HAF) spin S chain is that half-integer and integer have gapless gapped spectrums, respectively. The ground state (gs) HAF spin-1/2 spin-1 chains a quasi-long-range short-range correlation, We study effect exchange interaction between an forming normal ladder system its gs properties. inter-chain J...

We consider the problem of estimating the parameters of a chirp signal observed in multiplicative noise, i.e., whose amplitude is randomly time-varying. Two methods for solving this problem are presented. First, an unstructured nonlinear least-squares approach (NLS) is proposed. It is shown that by minimizing the NLS criterion with respect to all samples of the time-varying amplitude, the probl...

Cell-cell interactions are of crucial importance for the formation of tissues, homeostasis and regeneration processes as well as reactions on foreign bodies including implants. So far, however, the importance of heterotypic cell-cell interactions in the in vitro evaluation of implant surfaces has been largely neglected. This work aims to develop an in vitro methodology that enables the in-depth...

RNA interference (RNAi) is a conserved gene-silencing phenomenon that can be triggered by delivery of double-stranded RNA (dsRNA) to cells and is a widely exploited technology in analyses of gene function. Although a number of proteins that facilitate RNAi have been identified, current descriptions of RNAi and interrelated mechanisms are far from complete. Here, we report that the Caenorhabditi...

Arabidopsis has 12 histone acetyltransferases grouped in four families: the GNAT/HAG, the MYST/HAM, the p300/CBP/HAC and the TAFII250/HAF families. We previously showed that ham1 and ham2 mutants accumulated higher damaged DNA after UV-B exposure than WT plants. In contrast, hag3 RNA interference transgenic plants showed less DNA damage and lower inhibition of plant growth by UV-B, and increase...

A fifty-two years old Egyptian lady, case of cloacogenic carcinoma of anal canal with extensive liver metastasis showed complete remission with 5-Fluorouracil (5FU) and Cis-Dichlorodiammineplatinum(CDDP) chemotherapy only and remains disease free five & haf years after therapy.

We consider the joint estimation of the direction-of-arrival (DOA) and parameters of wideband polynomial-phase signals (PPSs) in sensor array. Unlike concurrent methods that require multidimensional searches, the proposed method requires 1D searches for all the parameters of interest. In this way, we can efficiently estimate the considered parameters in applications where large antenna arrays, ...

We present a liquid level sensing system for cryogenic fluids based on an array of aluminum-coated fiber Bragg gratings written in high-attenuation fibers (HAFs) interrogated by frequency-shifted interferometry (FSI). The sensors are heated up optically through the absorption of light at the core of the HAF sections. The distinct thermal response of sensors in the liquid from that in the gas pr...

We have realized a new optical cord with single-mode hole-assisted fiber (HAF) which has a superior bending loss that complies with ITU-T Recommendation G. 657 A2 & B3 for providing highly reliable optical fiber distribution facilities in central offices. The diameter of the new optical cord is 1.7 mm, and it can be detected with a conventional optical cord identifier despite its low bending lo...