117,515 research outputs found
Financial dollarization in Russia: causes and consequences
No full textWe review some aspects of financial dollarization in Russia, applying the main relevant theories to analyze the dynamics of several dollarization indicators. An econometric model of the short run dynamics of deposit and loan dollarization is estimated for the last decade. We find that ruble appreciation was the main driver of the de-dollarization that occurred then and of the later episode of renewed dollarization. We estimate the overall (and sectoral) currency mismatches of the Russian economy. The results show a gradual improvement of the net foreign currency position of the public sector, where we have seen significant accumulation of international reserves by the Bank of Russia and repayment of government debt. Evidence is also presented for the significant currency risk vulnerability of the nonbanking private sector. Several existing empirical studies are examined in order to assess the growth losses of the Russian economy following the crisis of 2008, which was linked with the financial dollarization.financial dollarization; currency mismatch; balance sheet effects; Russia
TTF-TCNQ-based thin films and microcrystals - growth and charge transport phenomena
No full textOrganische Materialien haben bis zur Mitte des 20. Jahrhunderts hinsichtlich ihrer elektronischen Eigenschaften keine besondere Aufmerksamkeit auf sich gezogen. Größeres Interesse an diesen Materialien entstand erst durch die Entdeckung einer ungewöhnlich hohen elektrischen Leitfähigkeit des organischen Perylen-Bromin Ladungstransfer-Komplexes durch Inokuchi et al. im Jahr 1954. Diese neue Klasse von Materialien besteht typischerweise aus Donor- und Akzeptor-Molekülen, die in einer bestimmten Stöchiometrie aneinander gebunden sind. Elektrische Ladung wird zwischen den Donor- und Akzeptor-Molekülen transferiert. Um diesen Prozess zu beschreiben, entwickelte Robert Mulliken in den 60er Jahren ein theoretisches Gerüst. Abhängig von der Anordnung der Moleküle und transferierten elektrischen Ladung kann der Ladungstransfer-Komplex (oder Salz) ein Isolator, ein Halbleiter, ein Metall oder sogar ein Supraleiter sein. Noch mehr Aufmerksamkeit erhielten Ladungstransfer-Materialien mit der Entdeckung des ersten quasi-eindimensionalen organischen Metalls TTF-TCNQ (tetrathiafulvalene-tetracyanoquinodimethane) im Jahr 1973. ..
Exploring the Interaction of Water with Open Metal Sites in MIL-101(Cr): a 1H NMR relaxometry and Molecular dynamics Study
No full textExploring the Interaction of Water with Open Metal Sites in MIL-101(Cr) by 1H NMR Relaxometry and ReaxFF Molecular Dynamics Simulations
No full textIn this work, we investigated the state of water in the metal-organic framework MIL-101(Cr) by combining 1H magic angle spinning (MAS) NMR, NMR relaxometry, and molecular dynamics (MD) simulations based on a reactive force field. The MD simulations indicated that water molecules are coordinated to the open metal sites and are organized in shells. Through 1H T2 and T1 relaxation measurements at the fixed Larmor frequency of 21 MHz, water in the intergrain spaces was distinguished from that in the intragrain mesopores of MIL-101(Cr). 1H MAS NMR measurements showed that water in the mesopores is structurally ordered, as revealed by the presence of 1H-1H residual dipolar interaction. The 1H NMR relaxometric behavior of water located in the intergrain spaces of MIL-101(Cr) as a function of the magnetic field strength, determined by fast field cycling NMR relaxometry, was interpreted extending an existing model, generally applied to paramagnetic aqua ions in solution, to the case of Cr3+ ions fixed on the surface of the metal-organic framework. The model predicts the exchange of water between the first and second shell of a Cr3+ ion, giving access to the water residence time in the first shell that would be difficult to determine using other techniques. In the temperature interval of 25-70 °C, water residence times in the range of tens of nanoseconds were found and a limited accessibility of water to the open metal sites located on the external grain surface was observed
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
Square Dancing with the Stars to Enhance Dynamic Hirschman Linkages?
No full textIn this Presidential Address, the author takes the reader on a reconnaissance of his life and time as a regional scientist. He points out scenery he found scintillating along the way, hoping that some may pick up the banner and chew on a few of the ideas for a while. He suggests a revisit to Albert O. Hirschman’s notion of key sectors and more empirical analysis related to Marcus Berliant’s and Masahisa Fujita’s notion of knowledge creation and transfer.Presidential Address, San Antonio, Texas, March 29, 2014 (53rd Meetings of the Southern Regional Science Association
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
Letter from unknown writer to Jesse L. Boyce
No full textLetter to Jesse L. Boyce from unknown author (possibly Jack) about the investigation into the powder magazine located in the Grand Canyon. Some personal news is included in the letter such as the writer's marriage to the daughter of C.A. Taylor, former Supervisor of Cochise County
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
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