387 research outputs found
A micrometeorological data base for the Mexico City Metropolitan Area
In order to overcome the lack of the surface micrometeorological data required for air quality studies in the Mexico City Metropolitan Area (MCMA), a long-term micrometeorological campaign was carried out in this area along the 2001-year. Three micrometeorological surface stations were installed at sites located at north,
north-east, and south sectors of the MCMA. Each station was equipped with a 3D ultrasonic turbulence sensor and with conventional meteorological sensors for temperature, relative humidity, pressure, global radiation, net radiation, and rain. The sampling rates were 10 Hz for the ultrasonic sensor, and 1 Hz for the conventional sensors. One-hour averages were calculated for all the meteorological
parameters and for the turbulence parameters such as friction velocity, scale temperature, Monin-Obukhov length, sensible heat flux and turbulent kinetic energy, among others. A simple micrometeorological database was prepared and mounted on a free access Internet page to furnish a specialized tool to the local Authorities to be utilized in health prevention and pollution regulation applications
Cosmic-Enu: An emulator for the non-linear neutrino power spectrum
Cosmology is poised to measure the neutrino mass sum and has
identified several smaller-scale observables sensitive to neutrinos,
necessitating accurate predictions of neutrino clustering over a wide range of
length scales. The FlowsForTheMasses non-linear perturbation theory for the
massive neutrino power spectrum, , agrees with its companion
N-body simulation at the level for Mpc. Building upon
the Mira-Titan IV emulator for the cold matter, we use FlowsForTheMasses to
construct an emulator for covering a large range of
cosmological parameters and neutrino fractions ,
which corresponds to ~eV. Consistent with FlowsForTheMasses at
the level, it returns a power spectrum in milliseconds. Ranking the
neutrinos by initial momenta, we also emulate the power spectra of momentum
deciles, providing information about their perturbed distribution function.
Comparing a ~eV model to a wide range of N-body simulation methods,
we find agreement to for Mpc and to
for Mpc. We find that the enhancement factor, the ratio
of to its linear-response equivalent, is most strongly
correlated with , and also with the clustering amplitude
. Furthermore, non-linearities enhance the free-streaming-limit
scaling
beyond its linear value of 4, increasing the -sensitivity of the
small-scale neutrino density.Comment: 17 pages, 14 figures, 3 tables. Emulator code available at:
https://github.com/upadhye/Cosmic-En
DiagnĂłstico y mejoramiento del Rastro municipal, Zacoalco de Torres.
Las propuestas de mejora a corto, mediano y largo plazo para el Rastro municipal de Zacoalco de Torres, es un proyecto que se desarrollĂł en el PAP San Pedro Valencia: Programa de Sustentabilidad Socioambiental para el Desarrollo Inclusivo en el cual identificamos una problemĂĄtica que se centra en la contaminaciĂłn del medio ambiente âsuelo- a causa de la mala disposiciĂłn de aguas residuales provenientes de procesos del Rastro Municipal. Esta mala gestiĂłn genera riesgos a la salud de viviendas aledañas por contaminaciĂłn de agua potable y exposiciĂłn a materia residual no tratada.
Para poder proponer dichas propuestas de mejora fue necesario elaborar un diagnĂłstico/formulario en base a la normativa mexicana aplicable en los rastros municipales. De este modo se encontrĂł un total de 22 Normas Oficiales Mexicanas, de las cuales solamente 5 involucran el manejo de las aguas residuales; Estas cinco normas son: NOM-008-ZOO-1994, NOM-009-ZOO-1994, NOM-194-SSA1-2004, NOM-001-SEMARNAT-1996, NOM-002-SEMARNAT-1996.
De esta forma, una vez que se aplicĂł el diagnĂłstico/formulario al director del rastro, se logrĂł identificar aquellas propuestas de mejora a corto, mediano y largo plazo para el rastro de Zacoalco de Torres. Asimismo, se buscĂł que en todo momento las propuestas fueran claras y de rĂĄpida aplicaciĂłn involucrando tanto a directivos del rastro como al director de gestiĂłn
y proyectos del agua potable en el municipio.ITESO, A.C
Emission and chemistry of organic carbon in the gas and aerosol phase at a sub-urban site near Mexico City in March 2006 during the MILAGRO study
Volatile organic compounds (VOCs) and carbonaceous aerosol were measured at a sub-urban site near Mexico City in March of 2006 during the MILAGRO study (Megacity Initiative: Local and Global Research Objectives). Diurnal variations of hydrocarbons, elemental carbon (EC) and hydrocarbon-like organic aerosol (HOA) were dominated by a high peak in the early morning when local emissions accumulated in a shallow boundary layer, and a minimum in the afternoon when the emissions were diluted in a significantly expanded boundary layer and, in case of the reactive gases, removed by OH. In comparison, diurnal variations of species with secondary sources such as the aldehydes, ketones, oxygenated organic aerosol (OOA) and water-soluble organic carbon (WSOC) stayed relatively high in the afternoon indicating strong photochemical formation. Emission ratios of many hydrocarbon species relative to CO were higher in Mexico City than in the U.S., but we found similar emission ratios for most oxygenated VOCs and organic aerosol. Secondary formation of acetone may be more efficient in Mexico City than in the U.S., due to higher emissions of alkane precursors from the use of liquefied petroleum gas. Secondary formation of organic aerosol was similar between Mexico City and the U.S. Combining the data for all measured gas and aerosol species, we describe the budget of total observed organic carbon (TOOC), and find that the enhancement ratio of TOOC relative to CO is conserved between the early morning and mid afternoon despite large compositional changes. Finally, the influence of biomass burning is investigated using the measurements of acetonitrile, which was found to correlate with levoglucosan in the particle phase. Diurnal variations of acetonitrile indicate a contribution from local burning sources. Scatter plots of acetonitrile versus CO suggest that the contribution of biomass burning to the enhancement of most gas and aerosol species was not dominant and perhaps not dissimilar from observations in the U.S
Autoimmune/inflammatory syndrome induced by adjuvants: a review
The autoimmune/inflammatory syndrome induced by adjuvants (ASIA) includes several autoimmune conditions and phenomena that occur after exposure to substances with adjuvant activity. The spectrum of the disease is heterogeneous with respect to the clinical presentation as well as the severity of the clinical manifestations. Different substances and medical devices with adjuvant activity are currently known, such as vaccines, oils, silicones, mineral salts, lipopolysaccharides, peptidoglycans, among others. These adjuvants are immunological molecules that function through potentiation of antigen-specific immune responses. Thus, the etiopathogenesis of ASIA syndrome involves a multifactorial interaction between environmental factors and genetic predisposition, and secondary activation of the adaptive and innate arms of the immune system through various mechanisms. Although in some reported cases the ASIA syndrome improves considerably when removing the implants, there are no conclusive results for the clinical benefit of removing the implants, so it is necessary to carry out further basic, clinical and surgical investigations in order to determine the best therapeutic decision
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The Magdalena Ridge Observatory Interferometer: 2014 status update
The Magdalena Ridge Observatory Interferometer has been designed to be a 10 à 1.4 m aperture long-baseline optical/near-infrared interferometer in an equilateral "Y" configuration, and is being deployed west of Socorro, NM on the Magdalena Ridge. Unfortunately, first light for the facility has been delayed due to the current difficult funding regime, but during the past two years we have made substantial progress on many of the key subsystems for the array. The design of all these subsystems is largely complete, and laboratory assembly and testing, and the installation and site acceptance testing of key components on the Ridge are now underway. This paper serves as an overview and update on the facility's present status and changes since 2012, and the plans for future activities and eventual operations of the facilities. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.The Magdalena Ridge Observatory Interferometer is funded by the U.S. Department of Transportation, the State of New
Mexico, and New Mexico Tech with previous funding from the Navy Research Laboratory (NRL, agreement no.
N00173-01-2-C902).This is the final published version of the article, also available from SPIE at http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1891908. Copyright 2014 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. http://dx.doi.org/10.1117/12.205733
Pion and proton showers in the CALICE scintillator-steel analogue hadron calorimeter
Showers produced by positive hadrons in the highly granular CALICE
scintillator-steel analogue hadron calorimeter were studied. The experimental
data were collected at CERN and FNAL for single particles with initial momenta
from 10 to 80 GeV/c. The calorimeter response and resolution and spatial
characteristics of shower development for proton- and pion-induced showers for
test beam data and simulations using Geant4 version 9.6 are compared.Comment: 26 pages, 16 figures, JINST style, changes in the author list, typos
corrected, new section added, figures regrouped. Accepted for publication in
JINS
Identificación molecular de hongos fitopatógenos de fresa por PCR (ITS Y EF-1α ) y susceptibilidad a bacteriocidas de Bacillus thuringiensis.
La generaciĂłn de resistencias a fungicidas de algunos hongos residentes del suelo representa un riesgo biolĂłgico en la producciĂłn de fresa por lo que su identificaciĂłn permite mejores medidas de control alternas a pesticidas quĂmicos como algunos pĂ©ptidos de origen bacteriano. Se amplificaron por PCR las secuencias ITS y EF-1α de 14 hongos aislados de muestras de suelo pertenecientes a una huerta dedicada al cultivo de fresa, los cuales fueron identificados por sus caracterĂsticas morfolĂłgicas dentro de los gĂ©neros Aspergillus, Fusarium, Mucor, Penicillium y Trichoderma. El anĂĄlisis de la secuencias permitieron la identificaciĂłn de las especies A. Niger, A. calidoustus, F. oxysporum, F. verticillioides, F. sporotrichioides, M. circinelloides, N. fischeri, P. menonorum, P.
pinophilium y T. asperellum, comprobando previamente su patogenicidad en fresa. Se determinĂł la actividad antimicrobiana de las bacteriocinas Morricina, Kurstacina, Kenyacina, Entomocina, Tolworthcina producidas por B. thuringiensis mediante bioensayos
de inhibiciĂłn en pozos y medio lĂquido corroborando su daño celular por microscopia de fluorescencia. Las 5 bacteriocinas ejercen una actividad inhibitoria sobre todos los aislados del gĂ©nero Fusarium y M. circinelloides evitando la esporulaciĂłn e inhibiendo su crecimiento comprobando su potencial capacidad como agentes antifĂșngicos en el biocontrol de hongos en fresa
Measurement of Leptonic Asymmetries and Top Quark Polarization in ttbar Production
We present measurements of lepton (l) angular distributions in ttbar -> W+ b
W- b -> l+ nu b l- nubar bbar decays produced in ppbar collisions at a
center-of-mass energy of sqrt(s)=1.96TeV, where l is an electron or muon. Using
data corresponding to an integrated luminosity of 5.4fb^-1, collected with the
D0 detector at the Fermilab Collider, we find that the angular distributions of
l- relative to anti-protons and l+ relative to protons are in agreement with
each other. Combining the two distributions and correcting for detector
acceptance we obtain the forward-backward asymmetry A^l_FB = (5.8 +- 5.1(stat)
+- 1.3(syst))%, compared to the standard model prediction of A^l_FB (predicted)
= (4.7 +- 0.1)%. This result is further combined with the measurement based on
the analysis of the l+jets final state to obtain A^l_FB = (11.8 +- 3.2)%.
Furthermore, we present a first study of the top-quark polarization.Comment: submitted versio
Measurement of the semileptonic charge asymmetry in B0 meson mixing with the D0 detector
We present a measurement of the semileptonic mixing asymmetry for B0 mesons,
a^d_{sl}, using two independent decay channels: B0 -> mu+D-X, with D- ->
K+pi-pi-; and B0 -> mu+D*-X, with D*- -> antiD0 pi-, antiD0 -> K+pi- (and
charge conjugate processes). We use a data sample corresponding to 10.4 fb^{-1}
of ppbar collisions at sqrt(s) = 1.96 TeV, collected with the D0 experiment at
the Fermilab Tevatron collider. We extract the charge asymmetries in these two
channels as a function of the visible proper decay length (VPDL) of the B0
meson, correct for detector-related asymmetries using data-driven methods, and
account for dilution from charge-symmetric processes using Monte Carlo
simulation. The final measurement combines four signal VPDL regions for each
channel, yielding a^d_{sl} = [0.68 \pm 0.45 \text{(stat.)} \pm 0.14
\text{(syst.)}]%. This is the single most precise measurement of this
parameter, with uncertainties smaller than the current world average of B
factory measurements.Comment: Version includes minor textual changes following peer review by
journal, most notably the updating of Ref. [21] to reflect the most recent
publicatio
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