1,804 research outputs found
Consistency of the proposed additive measures of revealed comparative advantage
The recently proposed additive measures of revealed comparative advantage (RCA) have been argued as better alternatives to the Balassa Index. This note builds on those suggestions and provides a framework to assess their applicability by means of their consistency across the dimensions and inferences that the indices' informational content allow. A formal empirical investigation supports the presented arguments that the proposed additive constructs of RCA possess certain inconsistencies that may obscure comparative analyses based on them, whereas alternative additive measures proposed here are shown to be more consistent over space and time, and hence may serve as better instruments in related quantitative research.Revealed comparative advantage
Exclusive Baryonic B Decays Circa 2005
The status of exclusive two-body and three-body baryonic B decays is
reviewed. The threshold enhancement effect in the dibaryon invariant mass and
the angular distributions in the dibaryon rest frame are stressed and
explained. Weak radiative baryonic B decays mediated by the electromagnetic
penguin process are discussed. Puzzles with the correlation
observed in decay and the unexpectedly large rate observed
for are examined. The former may indicate that
the system is produced through some intermediate states, while the
latter implies the failure of naive factorization for
modes and may hint at the importance of final-state rescattering effects.Comment: 21 pages, 9 figures, talk presented at 3rd International Conference
on Flavor Physics, Oct 3-8, 2005, National Central Univ. Chung-li, Taiwa
Radiative and transition form factors in a light-front constituent quark model
The form factors of the and radiative transitions are
evaluated within a light-front constituent quark model, using for the first
time the eigenfunctions of a light-front mass operator reproducing the meson
mass spectrum and including phenomenological Dirac and Pauli quark form factors
in the one-body electromagnetic current operator. The sensitivity of the
transition form factors both to the meson wave functions and to the constituent
quark form factors is illustrated. It is shown that the measurement of the and radiative transitions could help in discriminating among
various models of the meson structure.Comment: 9 pages, latex, 4 figures available as separate .uu file, to appear
in Phys. Lett.
Thermochemical properties of binary liquid systems N-alcohol/cyclohexane determined by an acoustic method
The results of ultrasonic and volumetric measurements were used to obtain the excess molar enthalpies for binary liquid mixtures containing cyclohexane, as the common component, and primary aliphatic alcohols
(n-propanol, n-butanol and n-pentanol) at 293.15 K. The excess molar enthalpies of those systems are positive in the whole concentrations range and show evidently different concentration dependences. The excess internal pressure of the liquid mixtures, determined in a few different ways, are negative for all the systems. The behaviour of those excesses are discussed in terms of intermolecular interactions in the binaries and the
self-association potential of the alcohols
Vector Meson Dominance as the first order of a sequence of Pade Approximants
The use of Pade Approximants for the analysis of the pion vector form-factor
is discussed and justified in this talk. The method is tested first in a
theoretical model and applied then on real experimental data. It is shown how
the Pade Approximants provide a convenient and reliable framework to
incorporate both low and high energy information in the euclidean region,
leading to improved determinations of the low energy parameters such as, e.g.,
the quadratic radius ^pi_V.Comment: 4 pages, 3 figures, espcrc2 style. To appear in the proceedings of
the 14th International QCD Conference, QCD 08, 7-12 July 2008, Montpellier
(France
Kreuze in den neuzeitlichen Gräbern der Pfarrkirche der hl. Maria Magdalena in Čazma
Arheološkim istraživanjima crkve Sv. Marije Magdalene u Čazmi dobiveno je obilje podataka o novovjekovnim običajima pokapanja pokojnika. Svetačke medaljice, krunice i križevi najzanimljiviji su predmeti pronađeni u grobovima. U ovom radu je naglasak stavljen na interpretaciju križeva te potrebu za što češćim objavljivanjem novovjekovnih nalaza.Im Laufe der archäologischen Ausgrabungen der Kirche der hl. Maria Magdalena in Čazma konnte eine Reihe von Hinweisen über neuzeitliche Bestattungsbräuche gewonnen werden. Heiligenmedaillons, Rosenkränze und Kreuze sind die interessantesten in den Gräbern vorgefundenen Gegenstände. Im Mittelpunkt dieses Artikels stehen die Interpretation der Kreuze sowie das Erfordernis einer möglichst häufi gen Veröff entlichung der neuzeitlichen Funde
Explaining Math Achievement;Personality, Motivation, and Trust
This study investigated the statistical significance of student trust next to the well-tested constructs of personality and motivation to determine whether trust is a significant predictor of course achievement in college math courses. Participants were 175 students who were taking undergraduate math courses in an urban public university. The Mini-Markers (Saucier, 1994), an adapted Student Trust Survey (Barnes, Adams & Forsyth, 2004, April), and the Motivated Strategies for Learning Questionnaire (Pintrich, Smith, Garcia & McKeachie, 1991) were used to measure students\u27 Big-Five personality factors, trust in their math instructor, and motivational beliefs and strategies for their learning and performance in one of the math courses they were taking during Spring 2009. Students reported their semester in college, gender and ethnicity their final math grades and math class size information were collected from the university at the end of the semester and their math course group was determined based on the categorization made by the university\u27s math department. The data were analyzed using bivariate correlations, independent samples t-tests, and hierarchical multiple regression models. The Conscientiousness factor correlated significantly with students\u27 final math grades, explaining 6 unique variance in students\u27 grades. Students\u27 trust in their math instructor also correlated significantly with their final math grades, contributing another 6 unique variance to the prediction of students\u27 grades. Students\u27 task value, self-efficacy beliefs, test anxiety, and effort regulation were all significantly correlated with their final math grades, and when these were added in the final prediction model, the significant effects of the Conscientiousness factor and student trust on students\u27 grades became non-significant. This showed that students\u27 motivated strategies for learning completely mediated the relationship between students\u27 Conscientiousness factor, trust, and their final math grades. The final prediction mod
Hard Constituent Quarks and Electroweak Properties of Pseudoscalar Mesons
The high momentum components generated in the wave function of pseudoscalar
mes* by the one-gluon-exchange interaction are investigated within a
relativistic constituent quark model. Adopting the light-cone formalism, the
sensitivity of the weak decay constant and the charge form factor to hard
constituent quarks is illustrated.Comment: 11 pages and 5 figs. (to be requested), LaTeX, INFN-ISS 94/3. To
appear in Physics Lett.
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