nanotechnology has been shown to have promising roles in the development of various industries including the agricultural sector. the primary purpose of this study was to investigate the researchers’ attitude and the obstacle hampering the development of nanotechnology in the agricultural sector of iran. the population of this study consisted of researchers in national research centers/institut...

For a robot to operate in a completely unknown environment, where obstacles are unknown and whether and how they move are also unknown, motion planning is largely an open problem. One essential challenge is how to guarantee that a robot can safely navigate in such an environment. We introduce a general approach to detect in real-time, based on sensing, if a future robot trajectory, which is a c...

We study the limit as n → 0 of the nonnegative, self-similar source-type solutions of the thin film equation ut + (uuxxx)x = 0. We obtain a unique limiting function u, which is a solution of an obstacle-type free boundary problem, with the constraint u ≥ 0, associated with the linear equation ut + uxxxx = 0. The function u is C1 for t > 0 and has finite speed of propagation, the positivity set ...

This work presents new methods and algorithms for tracking the shape and trajectory of moving reflecting obstacles with broken rays, or rays reflecting at an obstacle. While in tomography the focus of the reconstruction method is to recover the velocity structure of the domain, the shape and trajectory reconstruction procedure directly finds the shape and trajectory of the obstacle. The physica...

Motion vectors (MVs) characterize the movement of pixel blocks in video streams and are readily available. MVs not only allow us to avoid expensive feature transform and correspondence computations but also provide the motion information for both the environment and moving obstacles. This enables us to develop a new framework that is capable of simultaneous localization, scene mapping, and movi...

This paper demonstrates a real life approach for quadrotor obstacle avoidance in indoor flight. A color-based vision approach for obstacle detection is used to good effect conjointly with an adaptive path planning algorithm. The presented task is to move about a set indoor space while avoiding randomly located obstacles and adapting a path to prevent future confrontation with the obstacles all ...

Obstacle avoidance is an essential problem for applications involving multiple wheeled mobile robots. This research proposes a simple obstacle rule utilizing only one type of sensor, i.e., infrared sensor. In this research, sensors are placed on robot, arranged 45° radially equidistance. By using low-cost and easily available the cost time consumed to build repair robot considerably reduced. Av...

Assistive robotics has brought convenience especially to disabled and handicapped including the blinds. Mobile housekeeping robots such as floor cleaners are capable of local obstacle avoidance. However there is always a risk of hitting moving obstacles or blind human when they walk through the environment. In this article, a new decision mechanism is introduced for modelling path planning stra...

This paper proposes a new obstacle avoidance algorithm for the CONTROLAB AGV which uses a similar strategy adopted by a blind person to avoid obstacles while walking. The AGV moves within an office environment with a known floorplan and uses an "electronic stick" consisting of infrared sensors to detect unknown obstacles. Initially a global potential field function is defined for each floorplan...