Evolution of magnetic component in Yang-Mills condensate dark energy models

The evolution of the electric and magnetic components in an effective Yang-Mills condensate dark energy model is investigated. If the electric field is dominant, the magnetic component disappears with the expansion of the Universe. The total YM condensate tracks the radiation in the earlier Universe, and later it becomes $w_y\sim-1$ thus is similar to the cosmological constant. So the cosmic coincidence problem can be avoided in this model. However, if the magnetic field is dominant, $w_y>1/3$ holds for all time, suggesting that it cannot be a candidate for the dark energy in this case.Comment: 12 pages, 4 figures, minor typos correcte

A 2.0 Gb/s Throughput Decoder for QC-LDPC Convolutional Codes

This paper propose a decoder architecture for low-density parity-check convolutional code (LDPCCC). Specifically, the LDPCCC is derived from a quasi-cyclic (QC) LDPC block code. By making use of the quasi-cyclic structure, the proposed LDPCCC decoder adopts a dynamic message storage in the memory and uses a simple address controller. The decoder efficiently combines the memories in the pipelining processors into a large memory block so as to take advantage of the data-width of the embedded memory in a modern field-programmable gate array (FPGA). A rate-5/6 QC-LDPCCC has been implemented on an Altera Stratix FPGA. It achieves up to 2.0 Gb/s throughput with a clock frequency of 100 MHz. Moreover, the decoder displays an excellent error performance of lower than $10^{-13}$ at a bit-energy-to-noise-power-spectral-density ratio ($E_b/N_0$) of 3.55 dB.Comment: accepted to IEEE Transactions on Circuits and Systems

Physiological analysis on long shelf-life in ripening mutants (rin, nor, alc) tomato and their F1

English abstract: Changes in respiration, ethylene production, PG activity and firmness during ripening period were monitored in fruits of the 'alcobaca', 'nor', 'rin' mutants and those of normal tomato (Lycopersicon esculentum Mill.) In fruits of mutants (alc, nor, rin) no respiratory or ethylene climacteric was observed. Firmness declined very slowly with only trace levels of Polygalacturonasc (PG) in mature fruits. They showed a 400% increase in storability compared to normal cult. 524 with a mean storage life of 90-120 days. Ripening of fruits from heterozygous (nor/+), (alc/+), (rin/+) F1 plants was delayed. The respiratory climacteric was partially suppressed and delayed (5-7 days). Peak ethylene production was 45%-65% of that in normal fruits. Fruits harvested at the mature green may reached red colour