understanding the essence of movement and knowing how it exists in the physical world, is considered one of the most important philosophical issues in which wise men were occupied with, whether in the greek era or the islamic one. and if the presence of change was of much certainty as well as movement in the physical world, then, the most important issue is the study of how it is present outwar...

In the next decade, millions of sensors and small-scale mobile devices will integrate processors, memory and communication capabilities. Networks of devices will be widely deployed for monitoring applications. In these new applications, users need to query very large collections of devices in an ad-hoc manner. Most existing systems rely on a centralized system for collecting device data. These ...

II Symmetries in Classical Particle Mechanics 4 1 Hamiltonian and Lagrangian Formulations of Classical Particle Mechanics 5 1.1 Basic De nitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1.1 Constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1.2 Virtual Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.1.3 Generalized...

Since Vannevar Bush’s futuristic vision in 1945 [1] and one of its more recent incarnations, namely MyLifeBits [4], computer scientists have discussed the benefits of capturing data from the physical world (or rather a “mirror” of them) and bringing them to the virtual world, where they can be transformed into usable knowledge. We propose here to revisit this vision following a social tagging a...

Manufacturing and product design are grounded in the physical world. The entire product lifecycle involves a wide range of integrated tasks that focus on the properties of physical objects, beginning with begins with the design of physical objects and the specification of the materials from which the physical objects are made. Thus, reasoning tasks within manufacturing and product design requir...

Investigations of infants’ physical world over the past 20 years have revealed two main findings. First, even very young infants possess expectations about physical events. Second, these expectations undergo significant developments during the first year of life, as infants form event categories, such as occlusion, containment, and covering events, and identify the variables relevant for predic...