3,090 research outputs found
CARACTERIZACIÓN FÍSICA MECÁNICA DE LOS ADOBES USADOS EN LAS VIVIENDAS DE LAS ZONAS URBANO MARGINALES DE LA CIUDAD DE HUÁNUCO, PERÚ
Las viviendas elaboradas con adobe son ampliamente usadas en el mundo, por ser de bajo costo y auto construibles. En los últimos años, las viviendas con adobes han tenido gran expansión en las zonas urbano-marginales de la ciudad de Huánuco; sin embargo, este tipo de construcciones presentan importantes fallas estructurales. El objetivo de la investigación es estudiar las características físicas y mecánicas de los adobes en la zona urbano-marginales de Huánuco, para tener una referencia técnica de utilización. Se analizó la resistencia a la compresión y tracción de los adobes de acuerdo a la normativa E80 (Diseño y construcción con tierra reforzada); los resultados indican que los adobes tienen buen comportamiento a la resistencia de compresión, y mal comportamiento a la resistencia, de tracción
Diagnóstico del diseño urbanístico de la ciudad de Huánuco
The research work was carried out with the aim of diagnosing the urban situation of the city of Huánuco, in order to determine the sustaining of the Professional Academic School of architecture at Hermilio Valdizán Public University. It was designed a study of type applied in the descriptive level; analyses were carried out on the architectural conditions of the city of Huánuco, through opinions of the social actors involved in topics of formulation of political public and citizens common of a sample formed of 149 persons, so then the bibliographical material in reference also was analyzed. The techniques used for gathering data were: the survey was formulated according to the scale of Likert; it was carried out interviews and analyze to the lists of collation and the obtained results were: 85% of the population from Huánuco, consider that in spite of existing a Master Plan, nevertheless, this one has not been operative since it has not allowed to control the disorderly Urban growth, as far as the Road System; Uses of the ground and Urban Equipment, it also was found that 95% of the premises destined, for uses public, do not count on an infrastructure that are adapted to the norms of accessibility for disabled people, 85% of the people think that it is necessary the intervention and participation of professionals in architecture in the elaboration of projects and Management of Urban Development, linked to the construction of all kind of works. It was concludes that the necessity exists to train professionals in the field of the architecture and Urbanism, in order that these professionals contribute to the urban development, social and integral of the Region.El trabajo de investigación se realizó con el objetivo de diagnosticar la situación urbanística de la ciudad de Huánuco a fin de determinar la sostenibilidad del funcionamiento de la Escuela Académico Profesional de arquitectura en la Universidad Nacional Hermilio Valdizán. Para lo cual se diseñó un estudio de tipo aplicado en el nivel descriptivo; se realizaron análisis sobre las condiciones arquitectónicas de la ciudad de Huánuco, por medio de las opiniones de los actores sociales involucrados en temas de formulación de políticas públicas y ciudadanos comunes conformantes de una muestra de 149 personas; además, se analizó material bibliográfico referente. Las técnicas usadas para la recolección de la data fueron: la encuesta formulada en base a una escala valorativa de Likert; al mismo tiempo se realizaron entrevistas y análisis a las listas de cotejo del cual se obtuvieron los siguientes resultados: el 85% de la población huanuqueña considera que a pesar de existir un Plan Director, éste no ha sido operativo ya que no ha permitido controlar el crecimiento urbano desordenado en cuanto al sistema vial; usos del suelo y equipamiento urbano, se halló también que el 95% de los locales destinados para uso público no cuentan con una infraestructura que se adecuen a las normas de accesibilidad para personas discapacitadas, el 85% de las personas opinan que es necesaria la intervención y participación de profesionales en arquitectura en la elaboración de proyectos y gestión de desarrollo urbano ligados a la construcción de todo tipo de obras. Se concluye que existe la necesidad de formar profesionales en el campo de la arquitectura y urbanismo, a fin de que estos aporten al desarrollo urbanístico, social e integral de la Región
Módulo de vivienda con material reciclable en la ciudad de Huánuco
La construcción de un módulo de vivienda con materiales reciclables aporta con un sistema constructivo innovador y permite cambiar la conducta ambiental. El objetivo de la investigación es la construcción de un módulo de vivienda con material reciclable en la ciudad de Huánuco, transformando los residuos sólidos en elementos útiles para la construcción de viviendas, así mismo presentar una propuesta de solución al problema de déficit de viviendas y al problema de contaminación ambiental. La metodología planteada genera nuevo conocimiento en la experiencia proyectual de un proyecto hecho o de uno a construir. Se realizó ensayos de compresión de las botellas de plásticos y se analizó la cimentación. Se concluyó que los neumáticos de aro 16 son aptos para utilizarlos en la cimentación y en las ventanas; los neumáticos de trimoviles son aptos para el sobrecimiento; las botellas (pet) de agua mineral, rellena con tierra compacta son aptos para los muros y las fajas de neumáticos son aptos para la cobertura
Measurement of the mass and lifetime of the baryon
A proton-proton collision data sample, corresponding to an integrated
luminosity of 3 fb collected by LHCb at and 8 TeV, is used
to reconstruct , decays. Using the , decay mode for calibration, the lifetime ratio and absolute
lifetime of the baryon are measured to be \begin{align*}
\frac{\tau_{\Omega_b^-}}{\tau_{\Xi_b^-}} &= 1.11\pm0.16\pm0.03, \\
\tau_{\Omega_b^-} &= 1.78\pm0.26\pm0.05\pm0.06~{\rm ps}, \end{align*} where the
uncertainties are statistical, systematic and from the calibration mode (for
only). A measurement is also made of the mass difference,
, and the corresponding mass, which
yields \begin{align*} m_{\Omega_b^-}-m_{\Xi_b^-} &= 247.4\pm3.2\pm0.5~{\rm
MeV}/c^2, \\ m_{\Omega_b^-} &= 6045.1\pm3.2\pm 0.5\pm0.6~{\rm MeV}/c^2.
\end{align*} These results are consistent with previous measurements.Comment: 11 pages, 5 figures, All figures and tables, along with any
supplementary material and additional information, are available at
https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-008.htm
Study of and decays and determination of the CKM angle
We report a study of the suppressed and favored
decays, where the neutral meson is detected
through its decays to the and CP-even and
final states. The measurement is carried out using a proton-proton
collision data sample collected by the LHCb experiment, corresponding to an
integrated luminosity of 3.0~fb. We observe the first significant
signals in the CP-even final states of the meson for both the suppressed
and favored modes, as well as
in the doubly Cabibbo-suppressed final state of the decay. Evidence for the ADS suppressed decay , with , is also presented. From the observed
yields in the , and their
charge conjugate decay modes, we measure the value of the weak phase to be
. This is one of the most precise
single-measurement determinations of to date.Comment: 22 pages, 9 figures; All figures and tables, along with any
supplementary material and additional information, are available at
https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-020.htm
Study of decays to the final state and evidence for the decay
A study of decays is performed for the first time
using data corresponding to an integrated luminosity of 3.0
collected by the LHCb experiment in collisions at centre-of-mass energies
of and TeV. Evidence for the decay
is reported with a significance of 4.0 standard deviations, resulting in the
measurement of
to
be .
Here denotes a branching fraction while and
are the production cross-sections for and mesons.
An indication of weak annihilation is found for the region
, with a significance of
2.4 standard deviations.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-022.html,
link to supplemental material inserted in the reference
Observation of resonances consistent with pentaquark states in decays
Observations of exotic structures in the channel, that we refer to
as pentaquark-charmonium states, in decays are
presented. The data sample corresponds to an integrated luminosity of 3/fb
acquired with the LHCb detector from 7 and 8 TeV pp collisions. An amplitude
analysis is performed on the three-body final-state that reproduces the
two-body mass and angular distributions. To obtain a satisfactory fit of the
structures seen in the mass spectrum, it is necessary to include two
Breit-Wigner amplitudes that each describe a resonant state. The significance
of each of these resonances is more than 9 standard deviations. One has a mass
of MeV and a width of MeV, while the second
is narrower, with a mass of MeV and a width of MeV. The preferred assignments are of opposite parity, with one
state having spin 3/2 and the other 5/2.Comment: 48 pages, 18 figures including the supplementary material, v2 after
referee's comments, now 19 figure
Study of the production of and hadrons in collisions and first measurement of the branching fraction
The product of the () differential production
cross-section and the branching fraction of the decay () is
measured as a function of the beauty hadron transverse momentum, ,
and rapidity, . The kinematic region of the measurements is and . The measurements use a data sample
corresponding to an integrated luminosity of collected by the
LHCb detector in collisions at centre-of-mass energies in 2011 and in 2012. Based on previous LHCb
results of the fragmentation fraction ratio, , the
branching fraction of the decay is
measured to be \begin{equation*} \mathcal{B}(\Lambda_b^0\rightarrow J/\psi
pK^-)= (3.17\pm0.04\pm0.07\pm0.34^{+0.45}_{-0.28})\times10^{-4},
\end{equation*} where the first uncertainty is statistical, the second is
systematic, the third is due to the uncertainty on the branching fraction of
the decay , and the
fourth is due to the knowledge of . The sum of the
asymmetries in the production and decay between and
is also measured as a function of and .
The previously published branching fraction of , relative to that of , is updated.
The branching fractions of are determined.Comment: 29 pages, 19figures. All figures and tables, along with any
supplementary material and additional information, are available at
https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-032.htm
Evidence for the strangeness-changing weak decay
Using a collision data sample corresponding to an integrated luminosity
of 3.0~fb, collected by the LHCb detector, we present the first search
for the strangeness-changing weak decay . No
hadron decay of this type has been seen before. A signal for this decay,
corresponding to a significance of 3.2 standard deviations, is reported. The
relative rate is measured to be
, where and
are the and fragmentation
fractions, and is the branching
fraction. Assuming is bounded between 0.1 and
0.3, the branching fraction would lie
in the range from to .Comment: 7 pages, 2 figures, All figures and tables, along with any
supplementary material and additional information, are available at
https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-047.htm
Measurement of the lifetime
Using a data set corresponding to an integrated luminosity of ,
collected by the LHCb experiment in collisions at centre-of-mass energies
of 7 and 8 TeV, the effective lifetime in the
decay mode, , is measured to be ps. Assuming
conservation, corresponds to the lifetime of the light
mass eigenstate. This is the first measurement of the effective
lifetime in this decay mode.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-017.htm
- …