Mitre Corporation

About: Mitre Corporation is a company organization based out in Bedford, Massachusetts, United States. It is known for research contribution in the topics: Air traffic control & National Airspace System. The organization has 4884 authors who have published 6053 publications receiving 124808 citations. The organization is also known as: Mitre & MITRE.

Stream Option Manager (SOM): automated integration of aircraft separation, merging, stream management, and other air traffic control functions

Abstract: Stream Option Manager (SOM) is a proposed concept for automated integration of aircraft separation, merging and stream management, using linear programming techniques. It was developed as part of a research and development initiative for air traffic control (ATC) automation concepts, sponsored by the Federal Aviation Administration (FAA) and performed by MITRE Corporation. SOM is research; it has not been approved by the FAA for use in future ATC. SOM's purpose is to resolve possible problems involving multiple aircraft with given flight paths. Each aircraft must be separated by a minimum distance from every other aircraft at all times, and certain sets of aircraft (e.g., those about to land at a particular airport) must be merged or metered (lined up, or separated in trail by a given distance). Aircraft in sets called streams must be separated in the along-route direction at all times. Each aircraft is also subject to certain speed limits. Given the pilot-preferred flight paths, and separation, metering, stream, and speed requirements, SOM finds modified flight paths for each aircraft that satisfy all the requirements yet stay as close as possible to the pilot-preferred paths. SOM's algorithm represents the (x, y, z) positions of each aircraft at future times as variables in a linear program. The requirements are expressed or approximated by linear inequalities or equalities. Pilot preferences are approximated by a linear objective function. The SOM algorithm has been implemented successfully in a prototype simulation in 2D. Scenarios with up to 15 aircraft and 24 separation and/or merging problems have been resolved. >

Some Organizational Factors Related to the Effectiveness of Management Science Groups in Industry

Abstract: The organizational factors which can influence the “effectiveness” of a management science activity are discussed in this paper. The discussion is based on some preliminary findings from a series of studies, performed by Northwestern University, on the life histories of OR/MS groups in 66 large U.S. companies. Many companies could be observed having difficulties in absorbing their new management science functions. Such factors as the level of managerial support, client receptivity, organizational and technical capability of an OR/MS group i.e., the type and quality of its personnel and leadership, the organizational location, group reputation, the relevance of projects performed, and other variables are noted as being significant in determining effectiveness. How well established a group was in the organization is identified as being a critical factor in how these variables would influence the potential for a group's success or failure. This level of “establishment” is defined in terms of four life-cycle phases, namely, Pre-birth, Introductory, Transitional and Maturity. A case study demonstrating the appearance of these phases is presented. Successful implementation of a group's output is discussed as a possible measure of effectiveness. Client “receptivity” is related to the freedom permitted to a group, by their clients, to select projects, gather data, and implement proposals.

Exploring the Adoption, Utility, and Social Influences of Social Bookmarking in a Corporate Environment

Abstract: This paper describes an ongoing technology investigation to assess the value and utility of social bookmarking on a corporate intranet. We hypothesize that social bookmarking would be useful in this environment for resource management, information sharing and discovery, expert finding, and social networking. We discuss features of the prototype system deployed and early analysis of findings on adoption, usage, and social influences. We conclude with our challenges and plans for future development and integration into the enterprise

Role of climate in the rise and fall of the neo-assyrian empire

Abstract: Northern Iraq was the political and economic center of the Neo-Assyrian Empire (c. 912 to 609 BCE)-the largest and most powerful empire of its time. After more than two centuries of regional dominance, the Neo-Assyrian state plummeted from its zenith (c. 670 BCE) to complete political collapse (c. 615 to 609 BCE). Earlier explanations for the Assyrian collapse focused on the roles of internal politico-economic conflicts, territorial overextension, and military defeat. Here, we present a high-resolution and precisely dated speleothem record of climate change from the Kuna Ba cave in northern Iraq, which suggests that the empire's rise occurred during a two-centuries-long interval of anomalously wet climate in the context of the past 4000 years, while megadroughts during the early-mid seventh century BCE, as severe as recent droughts in the region but lasting for decades, triggered a decline in Assyria's agrarian productivity and thus contributed to its eventual political and economic collapse.