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  • AIRCRAFT COMMUNICATIONS AND NAVIGATION  (8)
  • Atomic and molecular structure and dynamics  (3)
  • MATERIALS, METALLIC  (2)
  • 1
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    Nonadiabatic quantum molecular dynamics with hopping. I. General formalism and case study (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-07-30
    Description: Author(s): M. Fischer, J. Handt, and R. Schmidt An extension of the nonadiabatic quantum molecular dynamics approach is presented to account for electron-nuclear correlations in the dynamics of atomic many-body systems. The method combines electron dynamics described within time-dependent density-functional or Hartree-Fock theory with trajectory-... [Phys. Rev. A 90, 012525] Published Tue Jul 29, 2014
    Keywords: Atomic and molecular structure and dynamics
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
    Published by American Physical Society (APS)
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    PAPER CURRENT
  • 2
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    Nonadiabatic quantum molecular dynamics with hopping. III. Photoinduced excitation and relaxation of organic molecules (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-07-30
    Description: Author(s): M. Fischer, J. Handt, and R. Schmidt Photoinduced excitation and relaxation of organic molecules (C 2 H 4 and CH 2 NH 2 + ) are investigated by means of nonadiabatic quantum molecular dynamics with hopping (NA-QMD-H), developed recently [Fischer, Handt, and Schmidt, paper I of this series, Phys. Rev. A 90, 012525 (2014)]. This method is first ... [Phys. Rev. A 90, 012527] Published Tue Jul 29, 2014
    Keywords: Atomic and molecular structure and dynamics
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
    Published by American Physical Society (APS)
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  • 3
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    Nonadiabatic quantum molecular dynamics with hopping. II. Role of nuclear quantum effects in atomic collisions (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-07-30
    Description: Author(s): M. Fischer, J. Handt, and R. Schmidt The role of electron-nuclear correlations, i.e., quantum effects in the nuclear motion in atomic collisions with complex targets, is discussed using the recently developed nonadiabatic quantum molecular dynamics with hopping method [Fischer, Handt, and Schmidt, paper I of this series, Phys. Rev. A 9... [Phys. Rev. A 90, 012526] Published Tue Jul 29, 2014
    Keywords: Atomic and molecular structure and dynamics
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    The vanadium-gallium system in the region of V sub 3 Ga. (1965)
    In:  Other Sources
    Details
    Publication Date: 2011-08-11
    Description: Solubility range of 75 atomic percent vanadium- gallium system to determine phases in equilibrium and ascertain presence or absence of superconductivity
    Keywords: MATERIALS, METALLIC
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Results of a Loran-C flight test using an absolute data reference (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: A closed circuit flight test was conducted using VORs and NDBs as reference points. The Loran-C data collected during the flight was then compared against a reference provided by a discrete address beacon system facility. Information on the equipment configuration in the aircraft, the flight procedure, and the results obtained are presented.
    Keywords: AIRCRAFT COMMUNICATIONS AND NAVIGATION
    Type: NASA. Langley Research Center Joint Univ. Program for Air Transportation Res., 1980 p75-90 (SEE N81-21999 13-01)
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    NASA TECHNICAL REPORTS
  • 6
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    The vanadium-gallium system in the region of V3Ga (1965)
    In:  CASI
    Details
    Publication Date: 2019-05-29
    Description: Vanadium-gallium system in region of V-3Ga studied by X-ray diffraction and metallography techniques
    Keywords: MATERIALS, METALLIC
    Type: NASA-TM-X-56545
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Results of a Loran-C flight test using an absolute data reference (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A closed circuit flight test was conducted in the Boston area using VOR's and NDB's as reference points. The Loran-C data collected during the flight was then compared against a reference provided by the Discrete Address Beacon System (DABS) facility at Lincoln Laboratories. A MIT crew used a commercial receiver and recorded Loran-C time differences which would also be compared with the data provided by the DABS facility and eventually with the data collected by Ohio University. The Ohio University low-cost receiver was used for this test which was conducted in the Ohio University DC-3 flying laboratory. The Loran-C time-difference data was recorded with a microcomputer data collection system and stored on magnetic tape for subsequent analysis. The MIT receiver was also on board the DC-3, and recorded its data on a cassette tape which was later used by the MIT crew for data analysis. The equipment configuration in the aircraft, the flight procedure and the results obtained from the data collected with Ohio University's receiver and recording system are described.
    Keywords: AIRCRAFT COMMUNICATIONS AND NAVIGATION
    Type: NASA-CR-162751 , TM-74
    Format: application/pdf
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  • 8
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    Data reduction software for LORAN-C flight test evaluation (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A set of programs designed to be run on an IBM 370/158 computer to read the recorded time differences from the tape produced by the LORAN data collection system, convert them to latitude/longitude and produce various plotting input files are described. The programs were written so they may be tailored easily to meet the demands of a particular data reduction job. The tape reader program is written in 370 assembler language and the remaining programs are written in standard IBM FORTRAN-IV language. The tape reader program is dependent upon the recording format used by the data collection system and on the I/O macros used at the computing facility. The other programs are generally device-independent, although the plotting routines are dependent upon the plotting method used. The data reduction programs convert the recorded data to a more readily usable form; convert the time difference (TD) numbers to latitude/longitude (lat/long), to format a printed listing of the TDs, lat/long, reference times, and other information derived from the data, and produce data files which may be used for subsequent plotting.
    Keywords: AIRCRAFT COMMUNICATIONS AND NAVIGATION
    Type: NASA-CR-162730 , TM-72
    Format: application/pdf
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  • 9
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    A video display interface for the LORAN-C navigation receiver development system (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A microprocessor-based development system was designed and fabricated for prototype test of navigation receiver designs. During use of this system in the development of low-cost LORAN-C receiver/processor concepts, the limitations of the integral KIM-1 display were severely felt. It was to augment this numerical display that the video character display was produced. The circuit design presented meets the need for a flexible-format display capable of driving a small standard video monitor with only minimal demands upon microprocessor memory and MPU cycles.
    Keywords: AIRCRAFT COMMUNICATIONS AND NAVIGATION
    Type: NASA-CR-156934 , TM-58
    Format: application/pdf
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  • 10
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    Results of the second flight test of the Loran-C receiver/data collection system (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The components of the Loran-C navigation system which were developed thus far are a phase-locked-loop receiver and a microcomputer development system. The microcomputer is being used as a means of testing and implementing software to handle sensor control and navigation calculations. Currently, the microcomputer is being used to collect and record data from the receiver in addition to development work. With these components, it was possible to record receiver data over a period of time and then reduce this data to obtain statistical information. It was particularly interesting to load the equipment developed in the laboratory into an aircraft and collect data while in flight. For initial flight tests, some important considerations were how well the entire system will perform in the field, signal strength levels while on the ground and in the air, the amount of noise present, changing of signal-to-noise ratio for various aircraft configurations and maneuvers, receiver overloading due to other equipment and antennas, and the overall usefulness of Loran-C as a navigation aid.
    Keywords: AIRCRAFT COMMUNICATIONS AND NAVIGATION
    Type: NASA-CR-158381 , TM-68
    Format: application/pdf
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