variable rate application (vra) based on site specific crop management (sscm) is an effective approach for optimizing the application of agricultural inputs and preventing the undesirable environmental impacts. design, construction and evaluation of a map-based vra system was the main objective followed in this research. for variable rate application based on the generated map, a direct injecti...

An assumption inherent in many models of visual space is that the spatial coordinates of retinal cells implicitly give rise to the perceptual code for position. The results of the experiments reported here, in which it is shown that retinally non-veridical locations of contour elements are used by the visual system for contour-element binding, lend support to a different view. The visual system...

In this paper we treat design philosophies and enabling technologies for ambient awareness within grids of future mobile computing/communication devices. We extensively describe the possible context sensors, their required accuracies, their use in mobile services—possibly leading to background interactions of user devices—as well as a draft of their integration into an ambient aware device. We ...

BACKGROUND Although high intensity focused ultrasound (HIFU) is a promising technology for tumor treatment, a moving abdominal target is still a challenge in current HIFU systems. In particular, respiratory-induced organ motion can reduce the treatment efficiency and negatively influence the treatment result. In this research, we present: (1) a methodology for integration of ultrasound (US) ima...

introduction: consumption of morphine, during pregnancy, in addition to inducing defects in the mother’s nervous system function, caused defects or delays in the formation and evolution of embryonic visual system. in the present study, changes in lens development were assessed in embryos exposed to morphine in utero. methods: female wistar rats (250-300 g) were mated with male rats and pregnanc...

This paper presents a review of characteristics of the two main visual servoing methods, image-based visual servoing and position-based visual servoing. First, a generic structure is defined with an emphasis on the same system inputs and outputs for the two methods. Stability, robustness, sensitivity, and other general characteristics of the methods are presented. To overcome the dependency of ...

Until recently, the general consensus with respect to the organization of ventral visual cortex is that early, retinotopic regions are sensitive to the spatial position of the input stimuli whereas later, higher-order regions are sensitive to the category of the input stimuli. Growing recognition of the bidirectional connectivity of the visual system has challenged this view and recent empirica...

| This paper discusses some important control design issues for robot visual servoing, in particular high-performance tracking. The limitations of pure visual feedback control are discussed, and an approach based on axis velocity control and estimated target velocity feedforward is proposed. Experimental results are obtained with a 50Hz low-latency vision system and an end-eeector mounted camer...