the aim of the present study was to evaluate the effect of melatonin as an antioxidant on spatial navigation memory in male diabetic rats. thirty-two male white wistar rats weighing 200 ± 20 g were divided into four groups, randomly: control, melatonin, diabetic and melatonin-treated diabetic. experimental diabetes was induced by intraperitoneal injection of 50 mg kg-1 streptozotocin. melatonin...

] I[ Abstract This paper delcribes fuzzy logic techniques used in a hierarchical behavior-based architecture for robot navigation. An architectural feature for threshold activation of fuzzy. behaviors is emphasized, which is potentially useful for tuning navigation performance in real world applications. The target application is autonomous local navigation of a small planetary rover. Threshold...

This chapter discusses how truly mobile occupational groups relate to locations in a vast working area when collaborating with each other. It brings forth two ethnographic studies on mobile professionals, working on the roads. Their work setting has predominantly been described from a perspective where they are isolated in the drivers-seat. However, seeing that the environment in which they dri...

Advances in wireless sensors and position technologies such as GPS enable location-based services that rely on the tracking of continuously changing positions of moving objects. The key issue in tracking techniques is how to minimize the number of updates, while providing accurate locations for query results. In this paper, for tracking networkconstrained moving objects, we first propose a simu...

Abstract—A skyline query finds objects that are not dominated by another object from a given set of objects. Skyline queries can filter unnecessary information efficiently and provide us important clues for various decision making tasks. Now a days, GPS devices and location based services are very popular and they can easily connect users and make groups. Conventional skyline queries are not su...

We describe a Virtual Reality system that allows users at different locations to interact with a distributed multiagent system. We use RoboCup (robot soccer) as a case study. A human player who is immersed in a CAVE can interact with the RoboCup simulation in its natural domain, by playing along with a virtual soccer game. The system supports distributed collaboration by allowing humans at diff...

The ability for a rover to localize itself with respect to its environment is a crucial issue to tackle autonomous long range navigation. In this paper, we first present and classify the various kind of functionalities a rover should be endowed with to estimate its position during long traverses. We then present a technique that relies on stereovision and pixel tracking to estimate the 6 parame...

Location based services are on the rise, many of which assume GPS based localization. Unfortunately, GPS incurs an unacceptable energy cost that can reduce the phone’s battery life to less than ten hours. Alternate localization technology, based on WiFi or GSM, improve battery life at the expense of localization accuracy. This paper quantifies this important tradeoff that underlies a wide range...

Current GPS technologies are capable of tracking and monitoring a person’s every movements. This paper is the first chapter of a thesis which will analyse the ethics of the real time tracking and monitoring of people using GPS-based location services. An overview of LBS, GPS and some pertaining ethical issues is given. A brief assessment of existing literature will give the reasoning for this s...

The Metia Framework defines a set of standard, open and portable models, interfaces, and protocols facilitating the construction of tools and environments optimized for the management, referencing, distribution, storage, and retrieval of electronic media; as well as a set of core software components (agents) providing functions and services relating to archival, versioning, access control, sear...