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.

Wide area surveillance concepts based on geosynchronous illumination and bistatic unmanned airborne vehicles or satellite reception

Abstract: This paper describes a space-based radar surveillance concept employing geosynchronous illumination and bistatic reception on either unmanned airborne vehicles (UAVs) or low-orbit satellites. Two classes of surveillance are considered: that of aircraft targets (generically designated as "airborne moving target indication" or AMTI) and that of slow-moving ground targets (generically designated as "ground moving target indication" or GMTI). While the bistatic concepts are hardly new, the emergence of high-speed processing to support large-scale beamforming for AMTI, and MTI-SAR for GMTI, have made these approaches feasible for space-based theater surveillance resulting in substantial cost and performance advantages over more conventional monostatic approaches when only limited regions (i.e. on or two theater-sized areas) need to be covered at any one time.

Effect of space charge on resolving power and ion loss in ion mobility spectrometry.

Abstract: The effect of space charge on the performance of an Ion Mobility Spectrometry (IMS) system becomes more important as the system is made smaller. We use the SIMION software package with the Statistical Diffusion Simulation (SDS) module and SIMION’s new capability to solve the Poisson equation to study the effect of space charge on ion loss and resolving power in IMS systems. We consider IMS systems ranging in length from 50 mm to 150 mm and in diameter from 8.33 mm to 50 mm with a fixed electric field of 50 V/mm. We also examine a system with a length of 50 mm, a diameter of 16.7 mm, and an electric field of 16.7 V/mm. We assume that any charge density can be injected into the IMS system, and we have obtained expressions that predict the ion loss and resolving power of IMS systems as a function of input charge density and drift tube aspect ratio (length/diameter).

Multidimensional measure of display clutter and pilot performance for advanced head-up display.

Abstract: INTRODUCTION: This study was conducted to: develop a multidimensional measure of display clutter for advanced head-up displays (HUDs) incorporating enhanced and synthetic vision; assess the influence of HUD configuration on perceptions of display clutter, workload, and flight performance; model clutter scores in terms of visual display properties; and model flight performance in terms of subjective and objective clutter indices. METHODS: In a flight simulator, 18 pilots with different levels of flight experience flew approaches divided into three segments. Three HUD configuration sets were presented under two levels of flight workload. Pilot ratings of overall display clutter, its underlying dimensions, and mental workload were recorded along with flight performance measures. Display image analysis software was used to measure visual properties of the HUDs. RESULTS: The multidimensional measure of clutter showed internal consistency with overall perceived clutter. Calculated clutter scores were sensitive to HUD configurations and in agreement with a priori display classifications. There was a trend for the extremes of display clutter to cause higher workload and less stable performance due to cognitive complexity and a lack of information for high and low clutter displays, respectively. Multiple linear regression models of perceived clutter were developed based on HUD visual properties with predictive utility. Models of flight performance based on the clutter score and workload ratings were also developed, but with less predictive power. DISCUSSION: Measures and models of display clutter are expected to be applicable to the evaluation of a range of display concepts.

The Interplay Between Ontology as Categorial Analysis and Ontology as Technology

Abstract: The notion of ontology today comes with two perspectives: one traditionally from philosophy and one more recently from computer science. The philosophical perspective of ontology focuses on categorial analysis, i.e., what are the entities of the world and what are the categories of entities? Prima facie, the intention of categorial analysis is to inventory reality. The computer science perspective of ontology, i.e., ontology as technology, focuses on those same questions but the intention is distinct: to create engineering models of reality, artifacts which can be used by software, and perhaps directly interpreted and reasoned over by special software called inference engines, to imbue software with human level semantics. Philosophical ontology arguably begins with the Greek philosophers, more than 2,400 years ago. Computational ontology (sometimes called “ontological” or “ontology” engineering) began about 15 years ago.

Improving Cyber Security and Mission Assurance Via Cyber Preparedness (Cyber Prep) Levels

Abstract: Increasing dependence on cyberspace makes preparedness against cyber threats integral to mission assurance The nature of cyber threats in general – and advanced persistent threats in particular – requires a longer-term commitment from senior leadership, including vision, strategy, and investment prioritization as well as the organizational agility to respond to ever-changing tactics and techniques The cyber preparedness (Cyber Prep) methodology enables an organization to (1) characterize the cyber threats that an organization or mission faces; (2) determine the level of preparedness necessary to ensure mission success; (3) facilitate strategic planning for cyber security by setting preparedness objectives; and (4) establish priorities for cyber security investment planning and management decisions This paper presents the framework underlying the Cyber Prep methodology