130,754 research outputs found
Corrole basicity in the excited states: Insights on structure-property relationships
No full textSteady-state fluorescence measurements and quantum-chemical DFT geometry optimizations are applied to extend the structure-property relationships between the free-base corrole macrocycle conformation and its basicity to the lowest excited S-1 and T-1 states. Direct basicity estimation in the lowest excited S-1 state is demonstrated by means of fluorescence quantum yield measurements. The long wavelength T1 tautomer is found to retain its basicity in the S(1 )state, whereas the short wavelength T2 tautomer shows a noticeable decrease in basicity in the S-1 state, which is related to the in-plane tilting of the pyrrole ring to be protonated. The conformational changes upon going from the ground to the lowest excited T-1 state and the influence of the meso-aryl substitution pattern on the overall degree of distortions and tilting of the pyrrole ring to be protonated are also discussed from the point of view of macrocycle basicity.Prof. W. Maes acknowledges the Research Foundation-Flanders (FWO) and Hasselt University for financial support. Prof. M. Kruk, Prof. L. Gladkov and Ass. Prof. D. Klenitsky acknowledge the State Program of Scientific Researches of the Republic of Belarus "Photonics, opto-and microelectronics", grant no.1.3.01, for financial support.Maes, W (corresponding author), Hasselt Univ, Inst Mat Res IMO IMOMEC, Agoralaan 1, B-3590 Diepenbeek, Belgium.
Kruk, MM (corresponding author), Belarusian State Technol Univ, Phys Dept, Sverdlov Str 13a, Minsk 220006, BELARUS.
[email protected]; [email protected]
F. Gladkovo pozicijos šio amžiaus trečiojo dešimtmečio literatūrinėje kovoje klausimu
No full textThe essay „Concerning F. Gladkov\u27s stand in the literary struggle of the twenties" deals with F. Gladkov\u27s bonds with „Kuznitsa" (the oldest circle of proletarian writers) and with his arguments with RAPP on important literary questions. The author proves that F. Gladkov saw eye to eye with „Kuznitsa" and that\u27s why it is wrong to contrast them.Straipsnyje „F. Gladkovo pozicijos šio amžiaus trečiojo dešimtmečio literatūrinėje kovoje klausimu" kalbama apie vieno iš tarybinės literatūros pradininkų ryšį su seniausia proletarinių rašytojų grupe „Kuznica", apie jo polemiką su RAPP įvairiais literatūrinio gyvenimo klausimais. Straipsnyje parodoma, kad Gladkovo pozicija dažniausiai sutapo su „Kuznicos" pozicija, ir todėl neteisinga vieną priešpastatyti kitai
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Quels textes lisons-nous ? Les classiques soviétiques au fil des révisions
No full textWhat texts do we read? Soviet classics revision after revision
'Soviet classics' (of Socialist Realism) became classics at the price of successive rewritings, including stylistic and ideological corrections made by the author or the editors. The examination of the various editions of Čapaev (D. Furmanov), Cement (F. Gladkov), Razgrom (A. Fadeev), Как zakaljalas' stal' (N. Ostrovskij) shows the need to put together critical editions of Soviet classics.
'Soviet classics' (of Socialist Realism) became classics at the price of successive rewritings, including stylistic and ideological corrections made by the author or the editors. The examination of the various editions of Čapaev (D. Furmanov), Cernent (F. Gladkov), Razgrom (A. Fadeev), Как zakaljalas' stal' (N. Ostrovskij) shows the need to put together critical editions of Soviet classics.</jats:p
Quels textes lisons-nous ? Les classiques soviétiques au fil des révisions
No full textWhat texts do we read? Soviet classics revision after revision
'Soviet classics' (of Socialist Realism) became classics at the price of successive rewritings, including stylistic and ideological corrections made by the author or the editors. The examination of the various editions of Čapaev (D. Furmanov), Cement (F. Gladkov), Razgrom (A. Fadeev), Как zakaljalas' stal' (N. Ostrovskij) shows the need to put together critical editions of Soviet classics.
'Soviet classics' (of Socialist Realism) became classics at the price of successive rewritings, including stylistic and ideological corrections made by the author or the editors. The examination of the various editions of Čapaev (D. Furmanov), Cernent (F. Gladkov), Razgrom (A. Fadeev), Как zakaljalas' stal' (N. Ostrovskij) shows the need to put together critical editions of Soviet classics.Niqueux Michel. Quels textes lisons-nous ? Les classiques soviétiques au fil des révisions. In: Revue des études slaves, tome 73, fascicule 4, 2001. La littérature soviétique aujourd'hui, sous la direction de Catherine Depretto. pp. 739-746
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Scholarly Communication and Publishing Lunch and Learn Talk #11: The ULS Open Access Author Fee Fund
No full textAt the May 2014 talk, you will learn about the ULS Open Access Author Fee Fund--what it is, why we do it, how it works, and how the program is going so far
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