In order to intercept hypersonic vehicles in near-space, a head-pursuit cooperative guidance law is proposed this paper. Firstly, interceptors are regarded as multi-agents, and the communication relationship between them represented by graph theory. Based on time consistency theory of multi-agent system sliding mode theory, designed along line-of-sight (LOS) ensure cooperation interceptors. Sec...

LAZZARO, M. D., and THOMSON, W. W. 1989. Ultrastructure of organic acid secreting trichomes of chickpea (Cicer arietinum). Can. J. Bot. 67: 2669-2677. The acid-secreting trichomes of chickpea (Cicer arietinum L.) were composed of 18 cells, including 1 basal cell, 3 elongate stalk cells, and 14 head cells. A subcuticular secretion chamber with cuticular pores was present above the head cells at ...

The posterior parietal cortex may function as an interface between sensory and motor cortices and thus could be involved in the formation of motor plans as well as abstract representations of space. We have recorded from neurons in the intraparietal sulcus, namely, the ventral and medial intraparietal areas (VIP and MIP, respectively), and analyzed their head-movement-related signals in relatio...

How head patterning is regulated in vertebrates yet to be understood. In this study, we show that frog embryos injected with Noggin at different blastula and gastrula stages had their development sequentially arrested positions. When timed BMP inhibition was applied BMP-overexpressing embryos, the expression of five genes: xcg-1 (a marker cement gland, which front-most structure embryo), six3 f...

The function of the vestibular system is to transduce the forces of gravity and movement into neurological signals that the brain can use to develop an awareness of the position of the head in space and to coordinate head movements with motor reflexes responsible for ocular and postural stability. Not surprisingly, lesions of the vestibular system commonly result in abnormal posture of the head...

Various experiments have shown scene-motion thresholds to be greater when the scene moves with the direction of the head turn than when the scene moves against the direction of the head turn. In fact, a virtual scene may appear to be more stable in space when moving slightly with the head turn than when the scne does not move. In this position paper, we discuss current investigations into this ...