48 research outputs found
Estimation of losses for adobe buildings in Pakistan
Adobe buildings are vulnerable to seismic forces. Large scale destructions and casualties have been caused due
to the collapse of adobe buildings during the past earthquakes. A significant number of adobe structures exist in
different parts of Pakistan, similar to other parts of the world. Since Pakistan lies in a seismic active region, it is
necessary to assess the level of vulnerability of these buildings in order to estimate associated losses during a
seismic event. This paper presents the results of a study which was conducted to quantify damages to adobe
buildings based on their fragility curves. The adobe buildings were found to be highly vulnerable to low intensity
earthquakes. The vulnerability of these buildings has been compared with the European adobe buildings. It was
noted that Pakistani adobe buildings were slightly less resistant to earthquakes as compared to similar buildings
in Europe. Retrofitting solutions were suggested in order to increase the seismic capacity of adobe buildings in
Pakistan
Assessment of seismic performance of adobe structures in Pakistan and Portugal
Adobe buildings exist in different parts of the world. The construction of these buildings can be carried out
economically, using locally available materials and skills that do not require use of modern machinery.
Therefore, adobe buildings provide an economic housing option. The construction of adobe structures is carried
out based on traditional construction practices which vary from region to region. This paper presents the results
of a study which was conducted to study the construction practices of adobe buildings in Pakistan and Portugal
in the context of their seismic vulnerability. The adobe buildings in both these countries were found to be
subjected to seismic hazard levels which, although is low in some regions, may cause significant damages. Lack of essential elements or details for the adequate seismic performance was found in the adobe buildings in both regions
Weak Kaon Production off the Nucleon
The weak kaon production off the nucleon induced by neutrinos is studied at
the low and intermediate energies of interest for some ongoing and future
neutrino oscillation experiments. This process is also potentially important
for the analysis of proton decay experiments. We develop a microscopical model
based on the SU(3) chiral Lagrangians. The basic parameters of the model are
fpi, the pion decay constant, Cabibbo's angle, the proton and neutron magnetic
moments and the axial vector coupling constants for the baryons octet, D and F,
that are obtained from the analysis of the semileptonic decays of neutron and
hyperons. The studied mechanisms are the main source of kaon production for
neutrino energies up to 1.2 to 1.5 GeV for the various channels and the cross
sections are large enough to be amenable to be measured by experiments such as
Minerva and T2K
Weak production of strange Ξ baryons off the nucleon
The authors would like to thank Luis Alvarez-Ruso and Manuel Jose Vicente Vacas for useful discussions. One of the authors (MRA) would like to thank the pleasant hospitality at University of Granada where part of the work has been done.The charged current Cabibbo-suppressed associated KΞ production off the nucleon induced by antineutrinos is studied at low and intermediate energies. The nonresonant terms are obtained using a microscopical model based on the SU(3) chiral Lagrangian. The basic parameters of the model are fπ, the pion decay constant, Cabibbo’s angle, the proton and neutron magnetic moments, and the axial vector coupling constants for the baryons octet, D and F, that are obtained from the analysis of the semileptonic decays of neutron and hyperons. In addition, we also consider Σ∗(1385) resonance, which can decay in KΞ final state when this channel is open. The studied mechanism is the prime source of Ξ production at antineutrino energies around 2 GeV and the calculated cross sections at these energies can be measured at the current and future neutrino experiments.This research has been supported by MINECO (Spain) and the ERDF (European Commission) Grants No. FIS2017-84038-C2-1-P, No. FIS2017-85053-C2-1-P, No. SEV-2014-0398, and by Junta de Andalucia (Grant No. FQM-225)
Revisiting and Induced Quasielastic Scattering from Nuclei in Sub-GeV Energy Region
We present the results of charged current quasielastic(CCQE) scattering cross
sections from free as well as bound nucleons like in , ,
and nuclear targets in 1 GeV
energy region.
The results are obtained using local Fermi gas model with and without RPA
effect.
The differences those may arise in the electron and muon production cross
sections due to the different lepton mass, uncertainties in the axial dipole
mass and pseudoscalar form factor, and due to the inclusion of second
class currents have been highlighted for neutrino/antineutrino induced
processes.Comment: Published in Journal of the Physical Society of Japan (NuInt-2015
Weak Production of Strange Particles and Mesons off the Nucleon
The strange particle production induced by (anti)neutrino off nucleon has
been studied for and channels.
The reactions those we have considered are for the production of single
kaon/antikaon, eta and associated particle production processes.
We have developed a microscopical model based on the SU(3) chiral Lagrangian.
The basic parameters of the model are , the pion decay constant, Cabibbo
angle, the proton and neutron magnetic moments and the axial vector coupling
constants for the baryons octet. For antikaon production we have also included
(1385) resonance and for eta production (1535) and
(1650) resonances are included.Comment: To appear in AIP Conf. Proc. of the Workshop CETUP*14, 12 Pages, 13
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