Research progress on the effects of non-ionizing radiation on the hippocampus / 中华放射医学与防护杂志

Hippocampus,as an important organization of the nervous system,has a close relationship with the biology function of learning,memory and spatial cognition.It is very important to clarify the specific influence of non-ionizing radiation on the hippocampus.This paper summarized briefly the effects of nonionzing radiation on hippocampus and relevant research method.

Analysis and simulation of the dynamic spectrum allocation based on parallel immune optimization in cognitive wireless networks.

Spectrum allocation is one of the key issues to improve spectrum efficiency and has become the hot topic in the research of cognitive wireless network. This paper discusses the real-time feature and efficiency of dynamic spectrum allocation and presents a new spectrum allocation algorithm based on the master-slave parallel immune optimization model. The algorithm designs a new encoding scheme for the antibody based on the demand for convergence rate and population diversity. For improving the calculating efficiency, the antibody affinity in the population is calculated in multiple computing nodes at the same time. Simulation results show that the algorithm reduces the total spectrum allocation time and can achieve higher network profits. Compared with traditional serial algorithms, the algorithm proposed in this paper has better speedup ratio and parallel efficiency.

Effect of Liu's Massage Technique on Teenagers with Cervical Vertebra Disease / 中国康复理论与实践

@#Objective To observe the effect of Liu's massage technique on teenagers with cervical vertebra disease.Methods 65 teenagers with cervical vertebra disease were divided into the trial group (n=35) and control group (n=30) treated with routine physical therapy and cervical vertebra disease gymnastics, but cases in the trial group were added with treatment of Liu's massage technique. All cases of two groups were evaluated with Clinical Assessment Scale for Cervical Spondylosis (CASCS) before and after treatment.Results After treatment, the CASCS scores of all cases improved significantly ( P<0.01), but the effect of the trial group was significantly superior to that of the control group ( P<0.01).Conclusion Liu's massage technique is effective on cervical vertebra disease of teenagers.

Effects of Pregnancy Exposure to 1800 MHz Electromagnetic Irradiation on Hippocampus Ultrastructure of Offspring Rats / 环境与健康杂志

Objective To study effects of 1 800 MHz electromagnetic field exposure in pregnancy on the ultrastructure of the hippocampus of offspring rats. Methods Ninety Wistar rats(female and male was 2:1) were mated,and the pregnant rats were exposed to 1 800 MHz microwave field with power density of 0.5 mW/cm2 or 1.0 mW /cm2,12 h/d,for 21 consecutive days,the rats in the control group received dummy exposure. Three rats aged 3 days and 72 days were selected from groups for ultrastructure observation of hippocampus. Results No significant pathological changes were observed in nerve cells and capillary vessels in the hippocampus. Conclusion The results of the present paper indicate that pregnancy exposure to 1 800 MHz electromagnetic field,may not lead to abnormal ultrastructure changes in hippocampus of offspring rats

DNA Damage in Hippocampal Cells of Rats Induced by Exposure to 1800 MHz Electromagnetic Irradiation / 环境与健康杂志

Objective To study the DNA damage in hippocampal cells of rats induced by 1 800 MHz electromagnetic irradiation. Methods Wistar rats were randomly divided into four groups, 2 exposed groups and 2 controls. The experimental subjects were exposed to the 1 800 MHz (continuous wave, CW) electromagnetic fields for 21days (12 h/d), the power densities were 0.5 mW/cm2 and 1.0 mW/cm2, meanwhile, sham-control exposures were carried out, the DNA damage was examined by Comet assay. Results The tailed rate and the tail area of the hippocampal cells in 1.0 mW/cm2 group was higher or larger than those in the control and 0.5 mW/cm2 groups(P