Differential distribution of TASK-1, TASK-2 and TASK-3 immunoreactivities in the rat and human cerebellum

In this work, the distributions of some acid-sensitive two-pore-domain K⁺ channels (TASK-1, TASK-2 and TASK-3) were investigated in the rat and human cerebellum. Astrocytes situated in rat cerebellar tissue sections were positive for TASK-2 channels. Purkinje cells were strongly stained and granule cells and astrocytes were moderately positive for TASK-3. Astrocytes isolated from the hippocampus, cerebellum and cochlear nucleus expressed TASK channels in a primary tissue culture. Our results suggest that TASK channel expression may be significant in the endoplasmic reticulum of the astrocytes. The human cerebellum showed weak TASK-2 immunolabelling. The pia mater, astrocytes, Purkinje and granule cells demonstrated strong TASK-1 and TASK-3 positivities. The TASK-3 labelling was stronger in general, but it was particularly intense in the Purkinje cells and pia mater.Received 25 February 2004; received after revision 19 April 2004; accepted 28 April 2004     

嵌入式操作系统中消息机制的研究

研究了实时的抢占式的小型嵌入式操作系统中消息机制的实现.针对Task调度、Task管理、同步通信、中断管理、时间管理机能这五部分进行了研究.为保证多个相关任务在执行次序上进行协调,阐述了同步通信机制所用三种方式Event Flag、Semaphore、MailBox的实现,着重讲述的是同步通信中Mail Box的实现.实际运行后证明系统完全满足通信需要.