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  • Other Sources  (15)
  • 2000-2004  (9)
  • 1985-1989  (6)
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  • 1
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    Wide-area technologies and services in the Trans-Pacific High Data Rate (HDR) satellite communications experiments (2000)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: This paper describes the technologies and services used in the experiments and demonstrations using the Trans-Pacific high data rate satellite communications infrastructure, and how the environment tasked protocol adaptability, scalability, efficiency, interoperability, and robustness.
    Keywords: Communications and Radar
    Type: Pacific Telecommunicatons Conference 2001; Honolulu, HI; United States
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  • 2
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    Trans-Pacific HDR satellite communications experiment, phase-2: results summary (2001)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: This paper summarizes the phase-2 of Trans-Pacific series of experiments and demonstrations by an international team in Canada, Japan, and the United States.
    Keywords: Communications and Radar
    Type: 7th Ka-band Utilization Conference; Genoa; Italy
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  • 3
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    Gas exchange and CO2 flux in the tropical Atlantic Ocean determined from Rn-222 and pCO2 measurements (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The piston velocity for the tropical Atlantic Ocean has been determined from 29 radon profiles measured during the TTO Tropical Atlantic Study. By combining these data with the pCO2 data measured in the surface water and air samples, the net flux of CO2 across the sea-air interface has been calculated for the tropical Atlantic. The dependence of the piston velocity on wind speed is discussed, and possible causes for the high sea-to-air CO2 flux observed in the equatorial zone are examined.
    Keywords: OCEANOGRAPHY
    Type: Journal of Geophysical Research (ISSN 0148-0227); 90; 7005-702
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  • 4
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    Proportional drift tubes for large area muon detectors (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A proportional drift chamber which consists of eight rectangular drift tubes with cross section of 10 cm x 5 cm, a sense wire of 100 micron phi gold-plated tungsten wire and the length of 6 m, was tested using cosmic ray muons. Spatial resolution (rms) is between 0.5 and 1 mm over drift space of 50 mm, depending on incident angle and distance from sense wire.
    Keywords: SPACE RADIATION
    Type: HE-5.2-11 , 19th Intern. Cosmic Ray Conf - Vol. 8; p 65-68; NASA-CP-2376-VOL-8
    Format: application/pdf
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  • 5
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    High-energy multiple muons and heavy primary cosmic-rays (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Three-dimensional simulations were carried out on high-energy multiple muons. On the lateral spread, the comparison with the deep underground observations indicates that the primary cosmic rays include heavy nuclei of high content. A method to determine the average mass number of primary particles in the energy around 10 to the 15th power eV is suggested.
    Keywords: SPACE RADIATION
    Type: OG-5.2-9 , 19th Intern. Cosmic Ray Conf - Vol. 2; p 222-225; NASA-CP-2376-VOL-2
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  • 6
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    Far-infrared line intensities of H2O and CO from warm molecular clouds (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Takahashi et al. (1983) have studied the role of H2O in the overall energetics of warm molecular clouds with large optical depths. It was found that in molecular clouds associated with nearby or embedded luminosity sources, the dust is likely to be warmer than the molecular gas. Thus, the warm dust represents the primary source of heat for the gas. In some cases, H2O was found to cool the gas. Takahashi et al. (1983) have presented the formalism for treating H2O in an optically thick molecular cloud with embedded sources of luminosity. The total H2O heating and cooling rates were also calculated. In the present investigation, the emergent intensities of far-infrared lines of H2O and excited, rotational CO transitions from relatively warm molecular clouds based on the large-velocity gradient model of the previous study are calculated. It is found that the dominant submillimeter CO transitions are related to emission, while the H2O transitions can be either absorption or emission lines.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 292; 192-199
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  • 7
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    Comments on the measurements of multiple muon phenomena (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The extensive air showers in the energy around 10 to the 15th power eV include those initiated by astrophysical primary gamma-rays. The observations need a precise measurement on the directions of primary particles. It is one of the methods to measure the directions of high-energy muons in air showers. The accuracy in measuring the direction, by calculating the cosmic-ray phenomena in the atmosphere at very high energy was investgated. The results calculated by Monte Carlo method suggest that one may determine the direction of primary cosmic-rays within errors of 10/3 rad in observing muons of above 100 GeV at sea level.
    Keywords: SPACE RADIATION
    Type: HE-5.2-13 , 19th Intern. Cosmic Ray Conf - Vol. 8; p 73-76; NASA-CP-2376-VOL-8
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  • 8
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    Developmental regulation of the effects of fibroblast growth factor-2 and 1-octanol on neuronogenesis: implications for a hypothesis relating to mitogen-antimitogen opposition (2002)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Neocortical neurons arise from a pseudostratified ventricular epithelium (PVE) that lies within the ventricular zone (VZ) at the margins of the embryonic cerebral ventricles. We examined the effects of fibroblast growth factor-2 (FGF-2) and 1-octanol on cell output behavior of the PVE in explants of the embryonic mouse cerebral wall. FGF-2 is mitogenic and 1-octanol antimitogenic in the PVE. Whereas all postmitotic cells migrate out of the VZ in vivo, in the explants some postmitotic cells remain within the VZ. We refer to these cells as the indeterminate or I fraction, because they neither exit from the VZ nor reenter S phase as part of the proliferative (P) fraction. They are considered to be either in an extremely prolonged G(1) phase, unable to pass the G(1)/S transition, or in the G(0) state. The I fate choice is modulated by both FGF-2 and 1-octanol. FGF-2 decreased the I fraction and increased the P fraction. In contrast, 1-octanol increased the I fraction and nearly eliminated the P fraction. The effects of FGF-2 and 1-octanol were developmentally regulated, in that they were observed in the developmentally advanced lateral region of the cerebral wall but not in the medial region. Copyright 2002 Wiley-Liss, Inc.
    Keywords: Life Sciences (General)
    Type: Journal of neuroscience research (ISSN 0360-4012); 69; 6; 714-22
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  • 9
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    Cell output, cell cycle duration and neuronal specification: a model of integrated mechanisms of the neocortical proliferative process (2003)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The neurons of the neocortex are generated over a 6 day neuronogenetic interval that comprises 11 cell cycles. During these 11 cell cycles, the length of cell cycle increases and the proportion of cells that exits (Q) versus re-enters (P) the cell cycle changes systematically. At the same time, the fate of the neurons produced at each of the 11 cell cycles appears to be specified at least in terms of their laminar destination. As a first step towards determining the causal interrelationships of the proliferative process with the process of laminar specification, we present a two-pronged approach. This consists of (i) a mathematical model that integrates the output of the proliferative process with the laminar fate of the output and predicts the effects of induced changes in Q and P during the neuronogenetic interval on the developing and mature cortex and (ii) an experimental system that allows the manipulation of Q and P in vivo. Here we show that the predictions of the model and the results of the experiments agree. The results indicate that events affecting the output of the proliferative population affect both the number of neurons produced and their specification with regard to their laminar fate.
    Keywords: Life Sciences (General)
    Type: Cerebral cortex (New York, N.Y. : 1991) (ISSN 1047-3211); 13; 6; 592-8
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  • 10
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    Neocortical malformation as consequence of nonadaptive regulation of neuronogenetic sequence (2000)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Variations in the structure of the neocortex induced by single gene mutations may be extreme or subtle. They differ from variations in neocortical structure encountered across and within species in that these "normal" structural variations are adaptive (both structurally and behaviorally), whereas those associated with disorders of development are not. Here we propose that they also differ in principle in that they represent disruptions of molecular mechanisms that are not normally regulatory to variations in the histogenetic sequence. We propose an algorithm for the operation of the neuronogenetic sequence in relation to the overall neocortical histogenetic sequence and highlight the restriction point of the G1 phase of the cell cycle as the master regulatory control point for normal coordinate structural variation across species and importantly within species. From considerations based on the anatomic evidence from neocortical malformation in humans, we illustrate in principle how this overall sequence appears to be disrupted by molecular biological linkages operating principally outside the control mechanisms responsible for the normal structural variation of the neocortex. MRDD Research Reviews 6:22-33, 2000. Copyright 2000 Wiley-Liss, Inc.
    Keywords: Life Sciences (General)
    Type: Mental retardation and developmental disabilities research reviews (ISSN 1080-4013); 6; 1; 22-33
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