4,260,032 research outputs found
Description of Maternal Age, Parity, and Birth Spacing, in Infants with Low Birthweight in Karawang, West Java
Background: Low birth weight (LBW) is a major public health problem in low income countries. LBW is associated with a range of both short and long term consequences. Maternal and fetal factors may determine the risk of LBW. This study aimed to describe the maternal age, parity, and birth spacing, ininfants with LBW, in Karawang, West Java.
Subjects and Method: This was a descriptive cross-sectional study conducted at Citra Sari Husada hospital, Karawang, West Java. A sample of 70 infants with low birth weight was selected by simple random sampling. The study variables were age, parity, birth spacing, and history of delivery of previous LBW babies. The data were taken from medical records. The data of each variable were described in percent.
Results: The cumulative incidence of LBW infantsin 2014 was 386 cases (20.29%) of the 1902 mothers who gave birth at Citra Sari Husada hospital, Karawang, West Java. Mothers who gave birth to LBW were mostly 20-35 years old (61.42%), 74.28% 2-3 parity, 81.42% ≥2 years birth spacing, and 92% had history of LBW baby in previous pregnancy.
Conclusion: The incidence of LBW has been described by maternal age, parity, birth spacing, and history of LBW in previous pregnancy.
Keywords: maternal age, parity, birth spacing, low birthweigh
Path description of type B q-characters
We give a set of sufficient conditions for a Laurent polynomial to be the
q-character of a finite-dimensional irreducible representation of a quantum
affine group. We use this result to obtain an explicit path description of
q-characters for a class of modules in type B. In particular, this proves a
conjecture of Kuniba-Ohta-Suzuki.Comment: 32 pages, late
Crystal Bases and Young Tableaux
Let B be the crystal basis of the minus part of the quantized enveloping
algebra of a semi-simple Lie algebra. Kashiwara has shown that B has a
combinatorial description in terms of an embedding of B into the tensor product
of B and k abstract crystals B_{i_j}, j=1,2,...,k, where the longest word in
the Weyl group is s_{i_1}...s_{i_k}. We give an explicit description of the
image of this embedding for classical Lie algebras of types A, B, C, D. This
description is in terms of semi-standard Young tableaux of types A, B, C, D
defined by Kashiwara and Nakashima.Comment: 23 pages, plain Te
Heavy Quark Distribution Function in QCD and the ACM Model
We show that the phenomenological \ACM ansatz is consistent with QCD through
order in the description of B\ra l\bar \nu_l+X_u and B\ra \gamma
+X_s transitions, including their energy spectra and differential
distributions. This suggests a concrete realization for the QCD distribution
function, which we call the ``Roman'' function. On the other hand the \ACM
model description of the end-point domain in B\ra l\bar \nu_l + X_c is
incompatible with QCD: a different distribution function enters the description
of b\ra c decays as compared to the transitions to the massless quarks. Both
observations -- the validity of the {\ACM}-like description for heavy-to-light
transitions and the emergence of the new distribution function in the b\ra c
case -- are in contradiction to a recent claim in the literature. The intrinsic
limitation of the \ACM model could reveal itself in different values of the
effective quark mass from fits of the and decays.Comment: 15 pages, Latex, 2 figures are included (as 2 appended postscript
files), CERN-TH.7159/94, TPI-MINN-94/2-T, UND-HEP-94-BIG02 (a few comments on
the literature are added
QCD-based description of one-particle inclusive B decays
We discuss one-particle inclusive B decays in the limit of heavy b and c
quarks. Using the large-N_C limit we factorize the non-leptonic matrix
elements, and we employ a short distance expansion. Modeling the remaining
nonperturbative matrix elements we obtain predictions for various decay
channels and compare them with existing data.Comment: LaTeX, 22 pages, 6 figures (eps); analytical and numerical results
unchanged, misrepresentation of experimental data in Fig. 5 corrected, final
published versio
The world-sheet description of A and B branes revisited
We give a manifest supersymmetric description of A and B branes on Kahler
manifolds using a completely local N=2 superspace formulation of the
world-sheet nonlinear sigma-model in the presence of a boundary. In particular,
we show that an N=2 superspace description of type A boundaries is possible, at
least when the background is Kahler. This leads to an elegant and concrete
setting for studying coisotropic A branes. Here, apgesan important role is
played by the boundary potential, whose precise physical meaning remains to be
fully understood. Duality transformations relating A and B branes in the
presence of isometries are studied as well.Comment: LaTeX, 32 page
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