[en] The TnT (troponin) concentration in 31 children patients with congenital cardiac disease both before and after operation was measured. The result shows that the TnT concentrations increase remarkably after operation and become normal gradually. The TnT concentration can indicate recovery process of the cardiac muscles after surgery

[en] A Beam Position Monitors (BPM) system in needed for the Rapid Cycling Synchrotron (RCS) in China Spallation Neutron Source (CSNS) to calculate and record beam position. It introduces the realization of the functional prototype of the BPM readout electronic system, including the architecture of the electronic hardware, the Analog Front-end (AFE) design, the digital Front-end (DFE) design, and the development of FPGA firmware. The AFE is the most important and the most difficult part because of the varying beam parameters. Therefore, it describes the realization of a new type of analog circuit in detail. The primary test results are also provided. The prototype meets the basic system demands and could contribute to the future commissioning of CSNS RCS. (authors)

[en] It introduces the design of charge measurement (MQ) circuit of MWPC, including how MQ works in the whole MWPC readout electronic system, the architecture of MQ circuit, and the logic and algorithm design of FPGA. MQ circuit can also be applied to readout systems for other detectors. The test results in different working modes are provided. (authors)

[en] We demonstrate a Faraday laser at Cs-D2 resonance line 852 nm using a Cs Faraday optical filter as frequency-selecting element. In contrast to typical diode laser with high stability of the emission frequency by additional control systems, our Faraday laser offers stable output frequency exactly set by the peak transmission frequency of the Cs 852 nm Faraday optical filter. The system works stably over a range of laser diode (LD) current from 60 to 130 mA and the LD temperature from 14 to 35 ${}^{\circ <!--\; ???\; -->}$C, as well as the 48-h wavelength fluctuation range of no more than ± 2 p.m. A most probable linewidth of 17 kHz with Lorentz fitting is obtained by beating between two identical laser systems. The wavelength of our system is stabilized within transmission frequency region of 852 nm Faraday optical filter, and the peak of the transmission is corresponding to Cs atomic Doppler broadened line at the cell temperature of 41 ${}^{\circ <!--\; ???\; -->}$C and the magnetic field of 330 G, making it suitable for laser-pumped Cs gas-cell and atomic beam frequency standard, etc. Moreover, this scheme is firstly used on Cs atom, opening new doors in research of Faraday laser and its applications.