In this paper, we present the implementation, both in a simulator and in a real-robot version, of an efficient solution to the so-called dynamical nightwatch’s problem on the micro-robot Khepera. The problem consists mainly in exploring a previously unknown environment while detecting, registering and recognizing light sources which may dynamically be turned on and off. At the end of each round...

Reinforcement learning (RL) offers a set of various algorithms for in-situation behavior synthesis [1]. The Qlearning [2] technique is certainly the most used of the RL methods. Multilayer perceptron implementations of the Q-learning have been proposed early [3], due to the interest of the restricted memory need and the generalization capability [4]. Self-organizing map implementation of the Q-...

nephritis remains an important problem in patients with systemic lupus erythematosus (sle). we conducted retrospective study to evaluate the efficiency of intravenous pulse cyclophosphamide in lupus nephritis: from 1983 to 1993, we reviewed 133 patients with biopsy proven lupus nephritis, 47 of them excluded because of short period of follow-up or defective laboratory data. eighty six patients ...

Pain in ICU patients should be managed effectively and safely. Fentanyl and Paracetamol are used frequently in ICU. However experience using IV Paracetamol in the setting of critically ill patients is limited. We evaluated the analgesic effect and adverse reactions of intravenous Paracetamol compared to Fentanyl in ICU patients with mild to moderate pain. Forty patients in a general ICU were ra...

Pain in ICU patients should be managed effectively and safely. Fentanyl and Paracetamol are used frequently in ICU. However experience using IV Paracetamol in the setting of critically ill patients is limited. We evaluated the analgesic effect and adverse reactions of intravenous Paracetamol compared to Fentanyl in ICU patients with mild to moderate pain. Forty patients in a general ICU were ra...

Locusts possess a bilateral pair of uniquely identifiable visual neurons that respond vigorously to the image of an approaching object. These neurons are called the lobula giant movement detectors (LGMDs). The locust LGMDs have been extensively studied and this has lead to the development of an LGMD model for use as an artificial collision detector in robotic applications. To date, robots have ...

Is it more e cient to use one or several robots? Will the performance of a group of robots working in a collaborative task be enhanced if the robots can communicate with one another? What learning abilities should the robot(s) be provided with for adapting to a continuously changing environment? We address these three issues in a speci c task, namely learning the topography of an environment wh...