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  • 1
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    Solare UV-Strahlung im Zeichen des erwarteten Klimawandels (2009)
    In:  In: BfS/BfR/RKI/UBA (Hrsg.): Klimawandel und Gesundheit. UMID – UmweltMedizinischerInformationsDienst, Ausgabe 3 (Themenheft), Dezember 2009, 24-28
    Details
    Publication Date: 2009
    Description: Gesundheitliche Bewertung ultravioletter Strahlung KATASTER-BESCHREIBUNG: KATASTER-DETAIL:
    Keywords: Deutschland ; Umweltmedizin ; UV-Strahlung
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    BIBLIOGRAPHY INKA BB
  • 2
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    Reflection and transmission of acoustical waves from a layer with space-dependent velocity. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The refraction of acoustical waves by a moving medium layer is theoretically treated and the reflection and transmission coefficients are determined. The moving-medium-layer velocity is uniform but with a space dependence in one direction. A partitioning of the moving medium layer into constant-velocity sublayers is introduced and numerical results for a three-sublayer approximation of Poiseuille flow are presented. The degenerate case of a single constant-velocity layer is also treated theoretically and numerically. The numerical results show the reflection and transmission coefficients as functions of the peak moving-medium-layer normalized velocity for several angles of incidence.
    Keywords: PHYSICS, GENERAL
    Type: Acoustical Society of America; vol. 51
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    A high-resolution Fourier-transform infrared spectrometer. (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: We have developed a Fourier-transform infrared spectrometer having a resolution of 0.5/cm over the range of wavelength from 1 to 5.5 microns. It has been used to observe the sun over this wavelength range from a Lear Jet flying at an altitude of 14 km, and to observe a number of stars from the ground, using the 229-cm telescope of the Steward Observatory and the 152-cm aluminum-mirror telescope at the Observatorio Astronomico Nacional in the Sierra de San Pedro Martir, Baja California, Mexico. The solar spectrum is given here, while the ground-based spectra are being published separately.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Astronomical Society of the Pacific; vol. 85
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    A polarizer for vacuum ultraviolet (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: An MgF2 double Rochon prism, useful as a polarizer or analyzer in wavelengths longer than 1300A is described. Measurements of MgF2 transmission and of polarizer angular beam deviation from 1150 to 2900A are presented. The prism is comprised of 2.25 mm, MgF2 depolarizers, optically contacted. At normal incidence, a 4% transmission gain was measured from 6000 to 2200A, compared with air spaced elements. One depolarizer was vibrated to 40 g from 20 to 3500 Hz without deterioration in optical contact. Transmissions below 1400A are not good. In thin samples, surface loss is twice absorption loss in the range 1150 to 1500A. Refraction indices and a computer ray trace were used in processing photographic beam divergence data. If care is taken to remedy scattering effects, the prism is an efficient on-axis polarizer in the 1300 to 3000A range.
    Keywords: OPTICS
    Type: CNES FOC F/96 Polarizers; 4 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    The design and implementation of CRT displays in the TCV real-time simulation (1975)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The design and application of computer graphics to the Terminal Configured Vehicle (TCV) program were described. A Boeing 737-100 series aircraft was modified with a second flight deck and several computers installed in the passenger cabin. One of the elements in support of the TCV program is a sophisticated simulation system developed to duplicate the operation of the aft flight deck. This facility consists of an aft flight deck simulator, equipped with realistic flight instrumentation, a CDC 6600 computer, and an Adage graphics terminal; this terminal presents to the simulator pilot displays similar to those used on the aircraft with equivalent man-machine interactions. These two displays form the primary flight instrumentation for the pilot and are dynamic images depicting critical flight information. The graphics terminal is a high speed interactive refresh-type graphics system. To support the cockpit display, two remote CRT's were wired in parallel with two of the Adage scopes.
    Keywords: COMPUTER OPERATIONS AND HARDWARE
    Type: Appl. of Computer Graphics in Eng.; p 641-652
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Damped Ly alpha absorbers at high redshift: Large disks or galactic building blocks? (1997)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The nature of the physical structures giving rise to damped Lyman alpha absorption systems (DLAS) at high redshifts is investigated. The proposal that rapidly rotating large disks are the only viable explanation for the observed asymmetric profiles of low ionization absorption lines is examined. Using hydrodynamic simulations of galaxy formation, it is demonstated that irregular protogalactic clumps can reproduce the observed velocity width distribution and asymmetries of the absorption profiles equally well. The velocity broadening in the simulated clumps is due to a mixture of rotation, random motions, infall and merging. The observed velocity width correlates with the virial velocity for the dark matter halo of the forming protogalactic clump. The typical virial velocity of the halos required to lead to the DLAS population is approximately 100 km/s. It is concluded that the evidence that DLAS at high redshift are related to large, rapidly rotating disks, is not compelling.
    Keywords: Astrophysics
    Type: NASA/CR-97-207707 , NAS 1.26:207707 , MPA-1029
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Integration of altitude and airspeed information into a primary flight display via moving-tape formats (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A ground-based aircraft simulation study was conducted to determine the effect on pilot performance of replacing the electromechanical altimeter and airspeed indicators with electronically generated representations integrated into the primary flight display via moving-tape (linear moving scale) formats. Several key factors relating to moving-tape formats were examined during the study: tape centering, secondary (trend) information, and tape orientation. The factor of centering refers to whether the tape was centered about the actual airspeed or altitude or about some defined reference value. Tape orientation refers to whether the values represented are arranged in either descending or ascending order. Six pilots participated in this study, with each subject performing 18 runs along a single, known flight profile. Subjective results indicated that the moving-tape formats were generally better than that of the conventional instruments. They also indicated that an actual-centered fixed pointer was preferred to a reference-centered pointer. Performance data for a visual secondary task showed that formats not containing trend information produced better performance; however, no difference was noted in airspeed tracking or altitude tracking performance. Regarding tape orientation, subjective comments indicated that there was lower work load and better performance when the airspeed tape had the high numbers at the top.
    Keywords: AIRCRAFT INSTRUMENTATION
    Type: NASA-TM-89064 , L-16221 , NAS 1.15:89064
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Development and evaluation of an airplane electronic display format aligned with the inertial velocity vector (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The development of an electronic primary flight display format aligned with the aircraft velocity vector, a simulation evaluation comparing this format with an electronic attitude-aligned primary flight display format, and a flight evaluation of the velocity-vector-aligned display format are described. Earlier tests in turbulent conditions with the electronic attitude-aligned display format had exhibited unsteadiness. A primary objective of aligning the display format with the velocity vector was to take advantage of a velocity-vector control-wheel steering system to provide steadiness of display during turbulent conditions. Better situational awareness under crosswind conditions was also achieved. The evaluation task was a curved, descending approach with turbulent and crosswind conditions. Primary flight display formats contained computer-drawn perspective runway images and flight-path angle information. The flight tests were conducted aboard the NASA Transport Systems Research Vehicle (TSRV). Comparative results of the simulation and flight tests were principally obtained from subjective commentary. Overall, the pilots preferred the display format aligned with the velocity vector.
    Keywords: AIRCRAFT INSTRUMENTATION
    Type: NASA-TP-2648 , L-16168 , NAS 1.60:2648
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Integration of altitude and airspeed information into a primary flight display via moving-tape formats: Evaluation during random tracking task (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A ground-based aircraft simulation study was conducted to determine the effects on pilot preference and performance of integrating airspeed and altitude information into an advanced electronic primary flight display via moving-tape (linear moving scale) formats. Several key issues relating to the implementation of moving-tape formats were examined in this study: tape centering, tape orientation, and trend information. The factor of centering refers to whether the tape was centered about the actual airspeed or altitude or about some other defined reference value. Tape orientation refers to whether the represented values are arranged in descending or ascending order. Two pilots participated in this study, with each performing 32 runs along seemingly random, previously unknown flight profiles. The data taken, analyzed, and presented consisted of path performance parameters, pilot-control inputs, and electrical brain response measurements.
    Keywords: AIRCRAFT INSTRUMENTATION
    Type: NASA-TM-4010 , L-16309 , NAS 1.15:4010
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Solar comparison spectra, 1.0-2.5 mu, from altitudes 1.5-12.5 km (1967)
    In:  CASI
    Details
    Publication Date: 2017-06-27
    Description: Solar and telluric infrared spectra from altitudes between 1.5 and 12.5 km
    Keywords: SPACE SCIENCES
    Type: COMMUN. OF THE LUNAR AND PLANETARY LAB., COMMUN. NOS. 93-99, VOL. 6, PT. 3 1967; P 171-176
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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