Search Results - (Author, Cooperation:E. Hsieh)

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  1. 1
    N. Phadnis ; E. P. Baker ; J. C. Cooper ; K. A. Frizzell ; E. Hsieh ; A. F. de la Cruz ; J. Shendure ; J. O. Kitzman ; H. S. Malik
    American Association for the Advancement of Science (AAAS)
    Published 2015
    Staff View
    Publication Date:
    2015-12-19
    Publisher:
    American Association for the Advancement of Science (AAAS)
    Print ISSN:
    0036-8075
    Electronic ISSN:
    1095-9203
    Topics:
    Biology
    Chemistry and Pharmacology
    Computer Science
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Alleles ; Animals ; Carrier Proteins/genetics/*physiology ; Cell Cycle/*genetics ; Chimera/genetics ; Crosses, Genetic ; Drosophila melanogaster/*genetics/growth & development ; Drosophila simulans/*genetics/growth & development ; Gene Expression Regulation, Developmental ; Genes, Essential/genetics/physiology ; Genes, Insect ; Genes, Lethal/genetics/*physiology ; *Genetic Speciation ; Male ; Molecular Sequence Data ; *Reproductive Isolation
    Published by:
    http://www.aaas.org/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Lo, D. H. ; Petrasso, R. D. ; Wenzel, K. W. ; Coleman, J. W. ; Li, C. K. ; Lierzer, J. R. ; Hsieh, E. ; Bernat, T.

    [S.l.] : American Institute of Physics (AIP)
    Published 1992
    Staff View
    ISSN:
    1089-7623
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Electrical Engineering, Measurement and Control Technology
    Notes:
    As part of an on-going effort to develop diagnostics for energetic charged particles from laboratory and space experiments, we examined the possibility that particle identification could be expedited by varying the applied bias voltage on silicon surface barrier detectors (SBDs). Using MeV protons, tritons, and alphas, we performed spectroscopy experiments whereby we observed changes of the energy spectrum as a function of the bias voltage. These particles were either generated via a Cockcroft–Walton linac as fusion products, or emitted from radioisotopes. The results indicate that, contrary to commonly held belief, the detector sensitive depth is not generally the depletion depth. Indeed for partially depleted SBDs the performance is not greatly degraded even for zero bias.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.1143581

    Articles: DFG German National Licenses
  3. 3
    Wenzel, K. W. ; Lo, D. H. ; Petrasso, R. D. ; Coleman, J. W. ; Li, C. K. ; Lierzer, J. R. ; Borrás, C. ; Wei, T. ; Hsieh, E. ; Bernat, T.

    [S.l.] : American Institute of Physics (AIP)
    Published 1992
    Staff View
    ISSN:
    1089-7623
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Electrical Engineering, Measurement and Control Technology
    Notes:
    A Texas Nuclear Cockcroft–Walton neutron generator was refurbished for use as a general fusion-product source. This well-calibrated source is now used routinely for characterizing energetic charged-particle detectors, for the development of nuclear fusion diagnostics, for studying radiation damage, and for calibrating x-ray detectors for laboratory and space plasmas. This paper is an overview of the facility. We describe the main accelerator operating systems, the primary fusion reactions studied, and several diagnostics used to characterize the fusion-product source.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.1143576

    Articles: DFG German National Licenses
  4. 4
    Wenzel, K. W. ; Petrasso, R. D. ; Lo, D. H. ; Li, C. K. ; Coleman, J. W. ; Lierzer, J. R. ; Hsieh, E. ; Bernat, T.

    [S.l.] : American Institute of Physics (AIP)
    Published 1992
    Staff View
    ISSN:
    1089-7623
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Electrical Engineering, Measurement and Control Technology
    Notes:
    In conjunction with γ-ray diagnostic development for the NOVA Upgrade and Alcator C-MOD experiments, we have assembled a comprehensive set of absolutely calibrated γ-ray sources and several γ-ray detectors. These tools will be used in characterizing and calibrating new γ-ray diagnostic systems as they are assembled. The γ-ray sources comprise both radioisotopes and nuclear reactions. The latter are generated in the MIT Cockcroft–Walton fusion-product generator. The detectors include several "standard'' NaI(Tl) scintillators and a high-resolution germanium detector. This paper briefly discusses the diagnostics planned for NOVA Upgrade and Alcator C-MOD. In addition it describes the γ-ray sources and detector characterizations we have performed in the laboratory.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.1143577

    Articles: DFG German National Licenses
  5. 5
    Li, C. K. ; Wenzel, K. W. ; Petrasso, R. D. ; Lo, D. H. ; Coleman, J. W. ; Lierzer, J. R. ; Hsieh, E. ; Bernat, T.

    [S.l.] : American Institute of Physics (AIP)
    Published 1992
    Staff View
    ISSN:
    1089-7623
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Electrical Engineering, Measurement and Control Technology
    Notes:
    A high-intensity, charged-particle-induced x-ray (PIXE) source has been developed for the purpose of characterizing x-ray detectors and optics, and measuring filter transmissions. With energetic proton beams up to 165 keV, intense line x radiations (0.5 A(ring)≤λ≤111 A(ring)) have been generated from the K, L, M, and N shells of elements 4≤Z≤92. The PIXE spectrum has orders-of-magnitude lower background continuum than a conventional electron beam or radioactive α-fluorescence source [C. K. Li, R. D. Petrasso, K. W. Wenzel et al. (to be published)].
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.1143578

    Articles: DFG German National Licenses
  6. 6
    Lierzer, J. R. ; Wenzel, K. W. ; Petrasso, R. D. ; Lo, D. H. ; Coleman, J. W. ; Li, C. K. ; Hsieh, E. ; Bernat, T.

    [S.l.] : American Institute of Physics (AIP)
    Published 1992
    Staff View
    ISSN:
    1089-7623
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Electrical Engineering, Measurement and Control Technology
    Notes:
    We are developing activation diagnostics for monitoring energetic charged-particle fluxes in space and laboratory plasmas. More immediately, we plan to use activation to measure the time-integrated proton flux from D–3He fusion reactions in Alcator C-MOD, providing a measure of the time-averaged D–3He fusion rate. We demonstrated the technique's feasibility by inducing significant gamma activity in a titanium sample exposed to D–3He protons created in our Cockcroft–Walton generator. The titanium target received a fluence of 5.5×109 protons at 14.7 MeV (of order what a 3-cm2 target should receive from one shot in Alcator C-MOD) and became activated by the48Ti(p,n)48V reaction. The activity's spectrum from a high-purity germanium (HPGe) detector showed the characteristic 0.984- and 1.312-MeV lines of 48V. The measured activity agreed reasonably well with theory. An absence of activity at those energies before D–3He activation eliminated background or D–D product-induced activity as the gamma source. We intend to repeat the experiment with a chromium target to evaluate that material's diagnostic potential.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.1143580

    Articles: DFG German National Licenses
  7. 7
    Staff View
    ISSN:
    1089-7674
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    This article presents the results of experiments in which a high-power laser was used to irradiate low density (4–9 mg/cm3) silica aerogel and agar foam targets. The laser–solid interaction and energy transport through the material were monitored with time-resolved imaging diagnostics, and the data show the production and propagation of an x-ray emission front in the plasma. The emission-front trajectory data are found to be in significant disagreement with detailed simulations, which predict a much more rapid heating of the cold material, and the data suggest that this discrepancy is not explainable by target inhomogeneities. Evidence suggests that energy transport into the cold material may be dominated by thermal conduction; however, no completely satisfactory explanation for the discrepancies is identified, and further experimental and theoretical research is necessary in order to resolve this important problem in laser–plasma interaction physics. © 1995 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.871081

    Articles: DFG German National Licenses
  8. 8
    Staff View
    ISSN:
    1089-7674
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The development of a plasma environment that is appropriate for the study of laser-plasma processes in laser-fusion plasma is reported. A material (titanium) with medium atomic number (Z) was used to provide x-ray measurements of radial and axial plasma symmetry as well as electron temperature. The electron density evolution was measured using stimulated scattering processes and odd half-harmonic generation from probe lasers of different wavelengths. The plasmas were created by two-sided irradiation of thin foils with 24 kJ of 351 nm laser light. When the peak electron density had decayed to about 4×1020 cm−3, the density profile was estimated to have a full width at half-maximum of 2 mm and the electron temperature was measured to be about 3 keV using K-shell spectroscopy. Two-dimensional computer simulations were found to reproduce some features of both electron density and temperature evolution. © 1995 American Institute of Physics.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.871079

    Articles: DFG German National Licenses
  9. 9
    Wang, L. C. ; Lau, S. S. ; Hsieh, E. K. ; Velebir, J. R.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1989
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Nonspiking (nonalloyed) Ge/Pd ohmic contact formed via solid phase reaction on an AlGaAs/GaAs high electron mobility transistor (HEMT) was investigated. The surface morphology of the Ge/Pd contact is smooth and planar with a typical contact resistivity of about 3×10−7 Ω cm2. The current-voltage characteristics of the HEMTs with the Ge/Pd contacts are similar to those with the conventional AuGe/Ni spiking (alloyed) contacts. Since only a thin substrate surface layer of 100–200 A(ring) was reacted with the Ge/Pd contact, we can conclude that ohmic contacts can be made to the two-dimensional electron gas without deep penetration of the metallization. This observation is in agreement with the concept that transport due to tunneling is significant across heterojunctions. The Ge/Pd contact may be potentially useful in HEMT integrated circuit technology.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.101032

    Articles: DFG German National Licenses
  10. 10
    Staff View
    ISSN:
    0020-7381
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Chemistry and Pharmacology
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0020-7381(83)87168-X

    Articles: DFG German National Licenses
  11. 11
    Staff View
    ISSN:
    0022-4073
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0022-4073(94)90061-2

    Articles: DFG German National Licenses
  12. 12
    Staff View
    ISSN:
    0022-4073
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0022-4073(94)90097-3

    Articles: DFG German National Licenses
  13. 13
    Shimoda, R. ; Hsieh, E. ; Mayeda, K.

    Amsterdam : Elsevier
    Staff View
    ISSN:
    0042-207X
    Source:
    Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics:
    Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Physics
    Type of Medium:
    Electronic Resource
    URL:
    http://linkinghub.elsevier.com/retrieve/pii/0042-207X(68)90152-8

    Articles: DFG German National Licenses
  14. 14
    Hsieh, E. T.

    New York, NY [u.a.] : Wiley-Blackwell
    Published 1921
    Staff View
    ISSN:
    0003-276X
    Keywords:
    Life and Medical Sciences ; Cell & Developmental Biology
    Source:
    Wiley InterScience Backfile Collection 1832-2000
    Topics:
    Medicine
    Additional Material:
    31 Ill.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1002/ar.1090200202

    Articles: DFG German National Licenses