1,723,230 research outputs found
Quantum calculation of photodetachment spectrum of OH-(H-2)
No full text[[abstract]]Quantum calculation of the photodetachment spectrum for OH-(H-2) has been carried out in full-dimensional space using the time-dependent wavepacket approach. The equilibrium geometry and harmonic frequencies for the OH-(H-2) configuration are obtained from extensive ab initio calculations and the ground state wavefunction of the anion is constructed by harmonic approximation. The quantum dynamics calculation of the FC factor shows that the end product resulting from the photodetachment of an electron from OH-(H-2) is dominated by the H-2 + OH fragment with only a small fraction of H + H2O fragment. The calculated spectrum is compared with the experimental result.[[fileno]]2010305010016[[department]]化學
THE VIBRATIONAL STRUCTURE OF OH RADICAL AND OH-HO COMPLEX: A MATRIX ISOLATION STUDY
No full textAuthor Institution: Universite Pierre et Marie Curie-Paris 6; CNRS; Laboratoire; de Dynamique, Interactions et Reactivite (LADIR), UMR 7075, Case Courrier; 49, 4 Place Jussieu, 75252 Paris Cedex 05, FranceHydroxyl radical, 'the detergent of atmosphere', the title is acquired due to capability of transformation of trace component present in atmosphere mainly troposphere into water soluble forms and also plays vital role in chemistry of the interstellar medium. The infrared spectra of OH radical isolated in solid neon have been investigated by Fourier Transform infrared spectroscopy (FTIR). OH monomer was prepared by microwave discharge of a mixture of water and neon gas at different concentrations prior to deposition on the cold mirror at 5 K. The microwave discharge of HO/Ne system is remarkable due to its propensity to form OH radical and other species like H, HO, OH-HO, OH-HO and (OH)-HO and IR spectroscopy reveals a variety of phenomena far from being fully understood. OH concentration studies, D/H isotopic substitution, and subsequent annealing leads to the characterization of the different species trapped in the neon matrix. All vibrationnal mode of OH-HO complex have been detected. The presence of species such as H and HO after matrix deposition led us to carry subsequent UV photolysis of our samples where the complex OH-HO may also be formed by following reaction: HO-H + h OH-H
The impact of decision-making sharing between supplier and manufacturer on their collaboration performance
No full textPurpose - IThe purpose of this paper is to focus on manufacturers and suppliers who engage in strategic relationships for quality improvement and new product development. Depending on the balance of bargaining power in the relationship, each partner's resource commitment to the activities such as quality improvement and new product development may vary. This has implications for both manufacturer and supplier profitability. Therefore the paper aims to investigate how variations in the structure of the decision-making process (i.e. manufacturer dominated, supplier dominated, or balanced) affect the performance of each partner in strategic collaborative relationship. Design/methodology/approach - In order to answer the research question, the paper uses real data from a telecommunications company to develop a simulation model and conduct a what-if analysis. Findings - The analysis shows that sharing the decision-making process has indeed a significant impact on the collaboration performance: an optimal outcome would have been achieved should the objective function have taken into account both partners' profit maximization at the same time. Although the outcome may be bound by the specific context of the case, the paper puts forth that the supply chain partners could expect better performance from their collaboration when both of their perspectives are accommodated equally. Originality/value - In conducting the research, unlike most of the previous studies using qualitative methods, this paper employed the system dynamics simulation to develop an analysis model by calibrating the real data. Therefore, the paper's conclusions are more analytical and generalizable than others based only on qualitative reasoning
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Portrait photograph oh H. L. Nickelson for member roster
No full textPortrait photograph oh H. L. Nickelson for member rosterhttps://mavmatrix.uta.edu/specialcollections_wdsmithphotography/11702/thumbnail.jp
Quasiclassical trajectory theoretical study on the chemical stereodynamics of the O(1D) +H2 !OH+H reaction and its isotopic variants (HD, D2)
No full textQuasiclassical trajectory theoretical study on the chemical stereodynamics of the O(1D) +H2 !OH+H reaction and its isotopic variants (HD, D2
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Formation of [b(n−1) + OH + H]+ Ion Structural Analogs by Solution-Phase Chemistry
No full textDerivatization of a variety of peptides by a method known to enhance anhydride formation is demonstrated by mass spectrometry to yield ions that have elemental composition and fragmentation properties identical to [b(n−1) + OH + H]+ ions formed by gas-phase rearrangement and fragmentation. The [b(n−1) + OH + H]+ ions formed by gas-phase rearrangement and fragmentation and the solution-phase [b(n−1) + OH + H]+ ion structural analogs formed by derivatization chemistry show two different forms of dissociation using multiple-collision CAD in a quadrupole ion trap and unimolecular decomposition in a TOF-TOF; one group yields identical product ions as a truncated form of the peptide with a free C-terminal carboxylic acid and fragments at the same activation energy; the other group fragments differently from the truncated peptide, being more resistant to fragmentation than the truncated peptide and yielding primarily the [b(n−2) + OH + H]+ product ion. Nonergodic electron capture dissociation MS/MS suggests that any structural differences between the specific-fragmenting [b(n−1) + OH + H]+ ions and the truncated peptide is at the C-terminus of the peptide. The specific-fragmentation can be readily observed by MSn experiments to occur in an iterative fashion, suggesting that the C-terminal structure of the original [b(n−1) + OH + H]+ ion is maintained after subsequent rearrangement and fragmentation events in peptides which fragment specifically. A mechanism for the formation of specific-fragmenting and nonspecific-fragmenting [b(n−1) + OH + H]+ ions is proposed
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