70,071 research outputs found
A New Approach to Texture Analysis of Quark Mass Matrices
The triangular basis is proposed as an efficient way of analyzing general
quark mass matrices. Applying the method to hermitian hierarchical matrices
with five texture zeros, analytic predictions for quark mixing can be readily
obtained. One unique texture pair is found most favorable with present data.
Some remarks are also made concerning parallel textures between the up and down
quark mass matrices with four zeros.Comment: 4 pages, talk presented at PASCOS'99, Lake Tahoe, California,
December 10-16, 199
Nonoblique Effects and Weak-Isospin Breaking from Extended Technicolor
Several aspects of the flavor-diagonal extended technicolor (ETC) gauge boson
are reviewed. Among them are an increase of that could explain the LEP
excess, a sizable, positive correction to the asymmetry parameter
, and a contribution to the weak-isospin breaking parameter
that is just barely acceptable by present data.Comment: Talk given at the Top Quark Workshop, Iowa State University, May
25-26, 1995, 6 pages, use WSPRL.ST
Hierarchical Majorana Scales in the Seesaw Model
If the mixing angles in each of the seesaw sectors are all small, and the
neutrino masses are hierarchical, we study the conditions for large neutrino
mixing using triangular matrices. In particular, the implication of the
neutrino oscillation data for the mass hierarchy in the heavy Majorana sector
is examined, and the heavy Majorana scales are shown to depend sensitively on
the solar mixing angle.Comment: 4 pages, talk presented at PASCOS'99, Lake Tahoe, California,
December 10-16, 199
Does public transit improvement affect commuting behavior in Beijing, China? : A spatial multilevel approach
Developing countries like China have experienced substantial city transformations over the past decade. City transformations are characterized by transportation innovations that allow individuals to access to speedy commuting modes for work activities and offer potential influences on commuting behavior. This paper examines the potential effects of subway system expansion in Beijing on commuting behavior. Our methodological design controls for spatial effects by employing Bayesian multilevel binary logistic models with spatial random effects. Using cross-sectional individual surveys in Beijing, the results suggest that there is a significant rise in subway commuting trips while non-motorized and bus commuting trips are reduced with the new subway expansion. Model comparison results show evidence about the presence of spatial effects in influencing the role of built environment characteristics to play in the commuting behavior analysis
On deep holes of generalized Reed-Solomon codes
Determining deep holes is an important topic in decoding Reed-Solomon codes.
In a previous paper [8], we showed that the received word is a deep hole of
the standard Reed-Solomon codes if its Lagrange interpolation
polynomial is the sum of monomial of degree and a polynomial of degree at
most . In this paper, we extend this result by giving a new class of deep
holes of the generalized Reed-Solomon codes.Comment: 5 page
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