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.

A Mechanically Reconfigurable Patch Antenna With Polarization Diversity

Abstract: A mechanically reconfigurable patch antenna with polarization diversity is presented. The antenna is composed of a fixed L-probe feed on a bottom substrate layer and a patch with truncated corners on an upper substrate layer that can rotate in azimuth. The layers are held together with a thin bolt going through the center of both layers. The handedness of the circular polarization (right-hand circular polarization or left-hand circular polarization) may be changed by simply rotating the upper substrate by 90° with respect to the fixed capacitively coupled feed. Additionally, since the upper layer is not permanently attached, the resonant frequency may be modified by swapping out the patch with one having different dimensions. The L-probe presented in this letter is impedance-matched to patch sizes resonating in the range of 1.0–1.8 GHz. The antenna design is presented along with measurement results, which are shown to be in excellent agreement with simulations. This simple and low-cost reconfigurable design is ideal for applications or systems where the antenna requirements may be variable.

Information-seeking behavior in an applied research/service delivery setting

Abstract: The area of rural mental health services was used as a testbed to study information-seeking behavior in a field that includes researchers, policymakers, and practitioners. Findings from a nationwide survey (n = 1666) describe the sources that were used to obtain information about various topics and the use and value of these sources by or to individuals in various work roles and settings. The findings demonstrate the importance of person-to-person communication; differences in the sources used, and the value placed on these sources, by individuals in different work roles and settings; and that information-seeking episodes generally involve using multiple sources (5.0) to obtain information about several topics (3.2).

Role of endogenous retroviruses in autoimmune diseases.

Abstract: GOURLEY, M.F., KISCH, W.J., MOJCIK, C.F., KING, L.B., KRIEG, A.M. and STEINBERG, A.D. Role of Endogenous Retroviruses in Autoimmune Diseases. Tohoku J. Exp. Med., 1994, 173 (1), 105-114 - Retroviruses have been implicated in the pathogenesis of murine and human lupus; however, many positive findings have been followed by alternative explanations. Initial findings implicating xenotropic retroviruses were subsequently invalidated. The first solid demonstration that endogenous retroviruses mediate disease was the study of SL/Ni mice. Here budding ecotropic retroviral particles from arterial smooth muscle cells caused an antibody response to the particles with subsequent complement deposition. Our laboratory has focused on derangements in endogenous MCF retroviral expression. We found that lupus-prone NZB, BXSB and MRL strains have a marked increase in expression of Mpmv RNA in their thymuses while bone marrow expression did not differ from normal strains. Sequence analysis demonstrated mutations in the NZB endogenous retroviruses which could alter expression. A phosphorothioate antisense oligonucleotide to the initiation sequence of Mpmv caused lymphocyte activation in vivo in normal mice, providing further evidence for in vivo effects of Mpmv and potential for pathological abnormalities in lupus-prone strains.

Incremental, Probabilistic Decision Making for En Route Traffic Management

Abstract: En route airspace congestion, often due to convective weather, causes system-wide delays and disruption in the US National Airspace System (NAS). Present-day methods for managing congestion are mos...