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  • 1
    Electronic Resource
    Electronic Resource
    Frequency-dependent second hyperpolarizabilities in the time-dependent restricted open-shell Hartree–Fock theory: Application to the Li, Na, K, and N atoms (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 112 (2000), S. 7903-7918 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The implementation of frequency-dependent second hyperpolarizabilities is presented using the time-dependent (spin-)restricted open-shell Hartree–Fock (TDROHF) theory (ROHF cubic response theory). The expression for the ROHF cubic response function (frequency-dependent second hyperpolarizability) is derived based on the quasienergy derivative (QED) method. We present an application of the ROHF cubic response theory to the frequency-dependent second hyperpolarizabilities of ground states of open-shell atoms (which are in S states) [Li(2S), Na(2S), K(2S), and N(4So)] for various third-order optical processes. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.481422
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  • 2
    Electronic Resource
    Electronic Resource
    Calculation of frequency-dependent second hyperpolarizabilities for electric field induced second harmonic generation in the second-order Møller–Plesset perturbation theory (1999)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 111 (1999), S. 842-848 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The calculations of frequency-dependent second hyperpolarizabilities for the (static) electric field induced second harmonic generation (ESHG) [γ(−2ω;ω,ω,0)] of the FH, H2O, CO, and NH3 molecules in the second-order Møller–Plesset perturbation theory (MP2) based on the quasienergy derivative (QED) method are performed by numerical differentiation of frequency-dependent first hyperpolarizabilities for the second harmonic generation (SHG) [β(−2ω;ω,ω)] with respect to static electric fields. The QED-MP2 values of the ESHG second hyperpolarizabilities γ(parallel)(−2ω;ω,ω,0) of the H2O, CO, and NH3 molecules show good agreement with the experimental values. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.479370
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  • 3
    Electronic Resource
    Electronic Resource
    Calculation of frequency-dependent first hyperpolarizabilities using the second-order Møller–Plesset perturbation theory (1999)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 110 (1999), S. 11720-11733 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We perform the first calculations of frequency-dependent first hyperpolarizabilities in the second-order Møller–Plesset perturbation theory (MP2) as analytical third derivatives of the time-averaged MP2 quasienergy with respect to electric field strengths. The calculations of frequency-dependent first hyperpolarizabilities using the quasienergy derivative (QED) method-based MP2 (QED-MP2) response theory are presented for the electro-optic Pockels effect (EOPE) [β(−ω;ω,0)] and second harmonic generation (SHG) [β(−2ω;ω,ω)] of the FH, H2O, CO, and NH3 molecules. The QED-MP2 values of the SHG first hyperpolarizabilities β(parallel)(−2ω;ω,ω) for the H2O, CO, and NH3 molecules show good agreement with the experimental values. The QED-MP2 response theory is the simplest in ab initio methods for including dynamical electron correlation effects in dynamic response properties efficiently. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.479171
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  • 4
    Electronic Resource
    Electronic Resource
    Novel arbekacin- and amikacin-modifying enzyme of methicillin-resistant Staphylococcus aureus (2000)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 190 (2000), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: An aminoglycoside-modifying enzyme in arbekacin-resistant methicillin-resistant Staphylococcus aureus (MRSA), exhibiting 4′′′-N-acetylation, was examined. Although the MRSA strain with AAC(4′′′) had no AAC(6′)-APH(2″) activity, a DNA fragment of the AAC(6′)-APH(2″) gene was amplified by PCR and the purified N-terminal 30-amino acid sequence of this AAC(4′′′) was identical to AAC(6′)-APH(2″). Direct DNA sequencing of this ‘silent’ AAC(6′)-APH(2″) gene revealed a single point mutation leading to a substitution of Gly for Asp80, through which the secondary structure is affected. A change in protein conformation could lead to a cleavage and a change of the enzymatic activity. We propose a new aminoglycoside-resistance mediated by AAC(4′′′) is caused by a mutation-modified AAC(6′)-APH(2″).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2000.tb09302.x
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  • 5
    Electronic Resource
    Electronic Resource
    Lidar Network System for Monitoring the Atmospheric Environment in Jakarta City (1998)
    Springer
    Optical review 5 (1998), S. 252-256 
    Details
    ISSN: 1349-9432
    Keywords: lidar ; Mie scattering lidar ; differential absorption lidar (DIAL) ; air pollution monitoring ; atmospheric boundary layer ; aerosol ; NO2 ; SO2 ; O3
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A lidar network system consisting of two Mie scattering lidars and one differential absorption lidar was developed to measure the atmospheric environment in Jakarta. The three lidars were installed at three locations in Jakarta to study atmospheric boundary layer structure and transportation of atmospheric pollutants. The Mie scattering lidars employ compact flashlamp pumped Nd:YAG lasers operated at 1064 nm fundamental. They are installed in shelters and directed vertically. One of the Mie lidar has a rotating wedged window for scanning conically to measure wind velocity using a correlation method. The DIAL system employs two Nd:YAG laser-pumped optical parametric oscillators. The DIAL is designed to measure distribution of ozone and SO2 in the near UV region, and NO2 in the 450-nm region. The system is installed in a shelter and has a full scanning capability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10043-998-0252-0
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  • 6
    Electronic Resource
    Electronic Resource
    Diode-Pumped Passively Q-switched Single-Frequency Nd:YAG Lasers (2000)
    Springer
    Optical review 7 (2000), S. 451-454 
    Details
    ISSN: 1349-9432
    Keywords: Nd:YAG ; Cr4+:YAG ; Q-switch ; single frequency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Laser-diode pumped passively Q-switched single-frequency Nd:YAG laser has been demonstrated with a Cr4+:YAG crystal as the saturable absorber. When pumped with a fiber-coupled CW laser diode, the laser produces pulses of 1.4-20.9 ns duration, with a repetition rate of 1.9-52.0 kHz. The highest peak power of 17.6 kW was obtained at an incident pump power of 1.8 W. The use of a Cr4+:YAG saturable absorber enables the laser to operate not only in a single-frequency mode but also linearly polarized. The mode selection mechanism is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10043-000-0451-9
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  • 7
    Electronic Resource
    Electronic Resource
    Differential Discrimination Technique for Incoherent Doppler Lidar to Measure Atmospheric Wind and Backscatter Ratio (1996)
    Springer
    Optical review 3 (1996), S. 47-52 
    Details
    ISSN: 1349-9432
    Keywords: Doppler lidar ; incoherent detection ; differential discrimination technique ; wind ; backscatter ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new incoherent Doppler lidar scheme is proposed using a high resolution Mach-Zehnder interferometer discriminator with sinusoidal transmission functions. A two-channel differential discrimination technique is developed which provides high sensitive velocity measurement. The aerosol and molecular backscatter signals can be separately measured and the backscatter ratio obtained. Principle of the measurement is described and the characteristics of this technique are analyzed and compared. Numerical calculation for a moderate size 1.064 μ lidar shows that an accuracy better than 1 m/s for the velocity measurement and 18% for the backscatter ratio measurement can be obtained up to a height of 10 km by a 500 shot average.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10043-996-0047-0
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  • 8
    Electronic Resource
    Electronic Resource
    Ultrasonic frequency modulation of laser oscillation from Nd3+ glass rod (1965)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 16 (1965), S. 66-67 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01589048
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  • 9
    Electronic Resource
    Electronic Resource
    Ultraviolet Rayleigh Lidar for Wind and Temperature Measurements (2000)
    Springer
    Optical review 7 (2000), S. 555-560 
    Details
    ISSN: 1349-9432
    Keywords: lidar ; remote sensing ; Rayleigh scattering ; wind ; temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new method of simultaneous remote sensing of atmospheric wind and temperature by a ultraviolet Rayleigh lidar is described. This technique uses two narrowband filters located at either side of the wings of the Rayleigh backscatter spectrum to analyze Rayleigh backscattering signals. These filters are selected to be greatly sensitive to both velocity and temperature. By measuring the ratio and the sum of the two normalized filtered signals, the line-of-sight wind velocity and temperature profiles can be retrieved. A lidar system is proposed for the wind velocity and temperature measurements in the middle atmosphere, and the simulation results show that the accuracies of velocity and temperature are about 1 m/s and 2 K at the height of 30 km, respectively. The influence of aerosol component has been estimated for clear weather conditions, and with an uncertainty of aerosol component of 15% the errors are about 0.1 m/s and 2 K above the troposphere, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10043-000-0555-2
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  • 10
    Electronic Resource
    Electronic Resource
    On the singularities of the solution to the Cauchy problem with singular data in the complex domain (1984)
    Springer
    Mathematische Annalen 269 (1984), S. 217-234 
    Details
    ISSN: 1432-1807
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01451420
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