The solar coronal magnetic field is anchored to a complex distribution of photospheric flux consisting of sunspots and magnetic elements.Coronal activity such as flares, eruptions and general LOTION 30 VOL 9% heating is often attributed to the manner in which the coronal field responds to photospheric motions.A number of powerful techniques have be
Leukemia Mediated Endothelial Cell Activation Modulates Leukemia Cell Susceptibility to Chemotherapy through a Positive Feedback Loop Mechanism.
In acute myeloid leukemia (AML), the chances of achieving disease-free survival are low.Studies have demonstrated a supportive role of endothelial cells (ECs) in normal hematopoiesis.Here we show that similar intercellular relationships exist in leukemia.We demonstrate that leukemia cells themselves initiate these interactions by directly modulatin
QPSK Modulator with Continuous Phase and Fast Response Based on Phase-Locked Loop
Among M-phase shift keying (M-PSK) schemes, quadrature phase-shift keying (QPSK) is used most often because of its efficient bandwidth consumption.However, in comparison with minimum-shift keying, which has continuous phase transitions, QPSK requires a higher bandwidth to transmit a signal.This article focuses on the phase transitions in QPSK signa