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Information and network communications play a vital role in the everyday operations of the United States Armed Forces. As the Department of Defense moves more toward Net-Centric Warfare, this role will only increase. Traditional work in Mobile Ad-Hoc Networks (MANETs) assumes there is no knowledge available about mobility patterns or communication traffic over time. However, this is generally not the case in military networks. In this article, we put forward the notion of a Network Tasking Order (NTO), which exploits a priori knowledge of network characteristics such as required data input/output, communications capability, and communications capacity. The concept of an NTO is defined as a parallel to the Air Tasking Order (ATO). Our premise is that the knowledge in an NTO can be used to achieve greater network reliability, to attain better network management, and to assist in optimizing network topology and routing. We present a scenario in which, based upon information contained in an NTO, low priority messages are either redirected or scaled back to avoid having high priority messages dropped from the network. MOTIVATION Department of Defense (DoD) Directive 8100.1 [1] defines the Global Information Grid (GIG) as the "globally interconnected, end-to-end set of information capabilities, associated processes, and personnel for collecting, processing, storing, disseminating and managing information on demand to warfighters, policy makers, and support personnel." In particular, the GIG includes all equipment involved in the transfer of information, that is, the military communications network. Joint Vision (JV) 2020 [2] specifies that the GIG will provide the networkcentric environment needed to achieve the goal of a US military that is a joint force capable of full spectrum dominance. In more current parlance, the future GIG will enable net-centric warfare/net-centric operations (NCW/ NCO). In DoD GIG Architectural Vision [3], the current GIG is described as static rather than dynamic and incapable of supporting NCW/NCO. Much research and

Studies of collisions in the introductory laboratory often use carts moving on air tracks or along dynamics tracks. As an alternative, students in our laboratories study collisions through experiments that determine coefficients of restitution ε's of balls used in sport. Since ε's are crucial to the outcome of many sporting events, such activities provide students with a “real-world” context for studying collisions. In the process of investigation and analysis, students learn about inelastic collisions, energy transfer, and elasticity of materials.

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