GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    High resolution infrared spectroscopy of deuterium in p-H2 matrix (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 9404-9407 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The high resolution spectrum of the fundamental band of deuterium impurity embedded in solid parahydrogen has been studied using a difference frequency laser spectrometer. This observation represents the first case of high resolution matrix spectroscopy in solid hydrogen. Both the Q1←0(0) and Q1←0(1) transitions were resolved into sharp features with a typical linewidth of (approximately-less-than) 10 MHz, while both the S1←0(0) and S1←0(1) transitions appeared to be much broader with widths of ∼0.07 cm−1. A discussion of the linewidths based on homogeneous broadening is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.461169
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Observation of the 2ν2(l=2)←0 overtone band of H+3 (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 6210-6215 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The overtone band of 2ν2(l=2)←0 of H+3 in the 2 μm infrared region has been observed in absorption by using a difference frequency laser spectrometer. The LiIO3 nonlinear optical system assembled by Bawendi and the bidirectional multiple path optical arrangement with velocity modulation have enabled us to observe 34 vibrational–rotation transitions from 5094 to 4557 cm−1. Liquid-N2 cooled plasmas were used for transitions involving low rotational levels, while gaseous-N2 cooled plasmas were used for high rotational levels, up to J,K=(9,9). From the relative intensities of the transitions, rotational temperature has been estimated to be ∼270 K for the former and ∼1300 K for the latter. The Δ||k−l||=±3 selection rule of the overtone band allows us to determine the absolute energy level values by combining the frequencies of the overtone band with those of the fundamental and hot bands.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458990
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The microwave spectrum, structure, and large amplitude motions of the methylacetylene⋅SO2 complex (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 6512-6522 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Rotational spectra of five isotopomers of the methylacetylene⋅SO2 (MA⋅SO2) van der Waals complex have been observed with a Fourier transform microwave spectrometer. Each species showed two sets of rotational transitions, one associated with the A (m=0) and the other with the E (m=±1) methyl group internal rotation states. The rotational transitions of the isotopomers with S 16O2 and the doubly substituted S 18O2 also showed inversion splitting ranging from tens of kHz to a few MHz. This splitting was absent in the S 16O 18O isotopomers. The spectra of these species have been assigned and fit, yielding rotational constants, which allowed a complete determination of the structure of the complex. The SO2 was found to sit above the carbon–carbon triple bond, with one of the S–O bonds roughly parallel to the symmetry axis of methylacetylene. The centers-of-mass distance between the two monomers was determined to be 3.382(10) A(ring). The center frequencies of the inversion doublets (or quartets) were used in a fit of both the A and the E transitions; the barrier hindering the internal rotation of the methyl group was determined to be 62.8(5) cm−1. Based on the dependence of the inversion splitting on the transition dipole direction and isotopic substitution, the inversion motion was identified as an "in plane'' wagging of the SO2 relative to methylacetylene. A pure inversion splitting of 3.11 MHz (free from rotation) was extracted from the A-state spectrum of the normal species, from which an inversion barrier height of about 63 cm−1 was estimated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468345
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Structure of the propene⋅sulfur dioxide complex (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 100 (1994), S. 15-22 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The rotational spectra of eight isotopomers of the propene⋅SO2 complex have been observed with a Fourier transform microwave spectrometer. The rotational constants of the normal species are A=4269.564 MHz, B=1577.2661 MHz, and C=1469.6335 MHz. The structure of the complex was derived from least-squares fitting of the 24 moments of inertia. It has a stacked, near-parallel planes configuration. The distance between the centers of mass of the two monomers is 3.26(5) A(ring). The sulfur atom is approximately above the propene double bond. The C2 axis of SO2 nearly eclipses the carbon–carbon single bond with the oxygen atoms towards the methyl group. The dipole moment of the complex was determined by Stark effect measurements to be μ=1.34(3) D. The binding energy is estimated to be 2.9 kcal/mol from the pseudodiatomic model. Both electrostatic and ab initio calculations have been carried out to rationalize the structure and properties of the complex. The effect of methyl group substitution on the structures and properties of the ethylene⋅SO2, propene⋅SO2, and toluene⋅SO2 complexes is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.466987
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Structure of hexafluorocyclobutene (1993)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 97 (1993), S. 10346-10348 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100142a013
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    The microwave spectrum, structure, and dipole moment of the butadiene-sulfur dioxide complex (1993)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 115 (1993), S. 5723-5728 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00066a043
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    facet.materialart.
    Unknown
    Stiff substrates enhance cultured neuronal network activity (2014)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2014-08-29
    Description: The mechanical property of extracellular matrix and cell-supporting substrates is known to modulate neuronal growth, differentiation, extension and branching. Here we show that substrate stiffness is an important microenvironmental cue, to which mouse hippocampal neurons respond and integrate into synapse formation and transmission in cultured neuronal network. Hippocampal neurons were cultured on polydimethylsiloxane substrates fabricated to have similar surface properties but a 10-fold difference in Young's modulus. Voltage-gated Ca2+ channel currents determined by patch-clamp recording were greater in neurons on stiff substrates than on soft substrates. Ca2+ oscillations in cultured neuronal network monitored using time-lapse single cell imaging increased in both amplitude and frequency among neurons on stiff substrates. Consistently, synaptic connectivity recorded by paired recording was enhanced between neurons on stiff substrates. Furthermore, spontaneous excitatory postsynaptic activity became greater and more frequent in neurons on stiff substrates. Evoked excitatory transmitter release and excitatory postsynaptic currents also were heightened at synapses between neurons on stiff substrates. Taken together, our results provide compelling evidence to show that substrate stiffness is an important biophysical factor modulating synapse connectivity and transmission in cultured hippocampal neuronal network. Such information is useful in designing instructive scaffolds or supporting substrates for neural tissue engineering. Scientific Reports 4 doi: 10.1038/srep06215
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Nature Publishing Group (NPG)
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 8
    facet.materialart.
    Unknown
    Multistep variational data assimilation: important issues and a spectral approach (2016)
    Co-Action Publishing
    In: Tellus A
    Details
    Publication Date: 2016-05-18
    Description: In this paper, two important issues are raised for multistep variational data assimilation in which broadly distributed coarse-resolution observations are analysed in the first step, and then locally distributed high-resolution observations are analysed in the second step (and subsequent steps if any). The first one concerns how to objectively estimate or efficiently compute the analysis error covariance for the analysed field obtained in the first step and used to update the background field in the next step. To attack this issue, spectral formulations are derived for efficiently calculating the analysis error covariance functions. The calculated analysis error covariance functions are verified against their respective benchmarks for one- and two-dimensional cases and shown to be very (or fairly) good approximations for uniformly (or non-uniformly) distributed coarse-resolution observations. The second issue concerns whether and under what conditions the above calculated analysis error covariance can make the two-step analysis more accurate than the conventional single-step analysis. To answer this question, idealised numerical experiments are performed to compare the two-step analyses with their respective counterpart single-step analyses while the background error covariance is assumed to be exactly known in the first step but the number of iterations performed by the minimisation algorithm is limited (to mimic the computationally constrained situations in operational data assimilation). The results show that the two-step analysis is significantly more accurate than the single-step analysis until the iteration number becomes so large that the single-step analysis can reach the final convergence or nearly so. The two-step analysis converges much faster and thus is more efficient than the single-step analysis to reach the same accuracy. Its computational efficiency can be further enhanced by properly coarsening the grid resolution in the first step with the high-resolution grid used only over the nested domain in the second step. Keywords: data assimilation, variational analysis, multistep, multiscale, spectral formulation (Published: 17 May 2016) Citation: Tellus A 2016, 68, 31110, http://dx.doi.org/10.3402/tellusa.v68.31110
    Print ISSN: 0280-6495
    Electronic ISSN: 1600-0870
    Topics: Geography , Geosciences , Physics
    Published by Co-Action Publishing on behalf of The International Meteorological Institute in Stockholm.
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 9
    facet.materialart.
    Unknown
    Sensors, Vol. 18, Pages 1231: An Energy-Efficient Compressive Image Coding for Green Internet of Things (IoT) (2018)
    MDPI Publishing
    In: Sensors
    Details
    Publication Date: 2018-04-18
    Description: Sensors, Vol. 18, Pages 1231: An Energy-Efficient Compressive Image Coding for Green Internet of Things (IoT) Sensors doi: 10.3390/s18041231 Authors: Ran Li Xiaomeng Duan Xu Li Wei He Yanling Li Aimed at a low-energy consumption of Green Internet of Things (IoT), this paper presents an energy-efficient compressive image coding scheme, which provides compressive encoder and real-time decoder according to Compressive Sensing (CS) theory. The compressive encoder adaptively measures each image block based on the block-based gradient field, which models the distribution of block sparse degree, and the real-time decoder linearly reconstructs each image block through a projection matrix, which is learned by Minimum Mean Square Error (MMSE) criterion. Both the encoder and decoder have a low computational complexity, so that they only consume a small amount of energy. Experimental results show that the proposed scheme not only has a low encoding and decoding complexity when compared with traditional methods, but it also provides good objective and subjective reconstruction qualities. In particular, it presents better time-distortion performance than JPEG. Therefore, the proposed compressive image coding is a potential energy-efficient scheme for Green IoT.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 10
    facet.materialart.
    Unknown
    Pore-size tuning in double-pillared metal-organic frameworks containing cadmium clusters (2011)
    Royal Society of Chemistry (RSC)
    Details
    Publication Date: 2011-03-26
    Description: Zu-Jin Lin, Tian-Fu Liu, Bo Xu, Li-Wei Han, Yuan-Biao Huang, Rong Cao (Communication from CrystEngComm) Zu-Jin Lin, CrystEngComm, 2011, DOI: 10.1039/c1ce05099k To cite this article before page numbers are assigned, use the DOI form of citation above. The content of this RSS Feed (c) The Royal Society of Chemistry
    Electronic ISSN: 1466-8033
    Topics: Geosciences , Physics
    Published by Royal Society of Chemistry (RSC)
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...