1,643 research outputs found
Recommended from our members
A Copula-Based Joint Model of Commute Mode Choice and Number of Non-Work Stops during the Commute
At the time of publication A. Portoghese, E. Spissu, and I. Meloni were at University of Cagliari, and C.R. Bhat and N. Eluru were at the University of Texas at Austin.In this paper, in the spirit of a tour-based frame of analysis, we examine the commute mode choice
and the number of non-work stops during the commute. Understanding the mode and activity stop
dimensions of weekday commute travel is important since the highest level of weekday traffic
congestion in urban areas occurs during the commute periods. The paper employs a copula-based
joint multinomial logit – ordered modeling framework in which commute mode choice is modeled
using a multinomial logit formulation and the number of commute stops is modeled using an ordered
response formulation. The data used in this study are drawn from the “Time use” multipurpose
survey conducted between 2002 and 2003 by the Turin Town Council and the Italian National
Institute of Statistics (ISTAT) in the Greater Turin metropolitan area of Italy. The results highlight
the importance of accommodating the inter-relationship between commute mode choice and
commute stops behavior. The results also point to the stronger effect of household responsibilities
and demographic characteristics in the Italian context compared to the US context.Civil, Architectural, and Environmental Engineerin
h\to \gamma \gamma In Inert Higgs Doublet Model
Motivated by the recent result reported from LHC on the di-photon search for
a Standard Model (SM) Higgs-like boson. We discuss the implications of this
possible signal in the framework of the Inert Higgs Doublet Model (IHDM),
taking into account previous limits from Higgs searches at LEP, the Tevatron
and the LHC as well as constraints from unitarity, vacuum stability and
electroweak precision tests. We show that the charged Higgs contributions can
interfere constructively or destructively with the W gauge bosons loops leading
to enhancement or suppression of the di-photon rate with respect to SM rate. We
show also that the invisible decay of the Higgs, if open, could affect the
total width of the SM Higgs boson and therefore suppress the di-photon rate.Comment: 15 pages, added reference
- …