656 research outputs found
Aproximación a un estudio de las reseñas literarias en diversos suplementos culturales españoles.
In this article we have analyzed the most important cultural supplement of the most sold newspapers in our country during three weeks, we have studied the different ways to make literature critic. We wanted to know: what kind of literature is on these publications, how important poetry is nowadays and witches are the most important editorials
Políticas públicas con perspectiva de género
Proyecto Terminal (Licenciatura en Sociología) -- Universidad Autónoma Metropolitana, Unidad Azcapotzalco, División de Ciencias Sociales y Humanidades, Departamento de Sociología, Área de concentración: Sociología Política. UAMADCSHDS. 1 archivo PDF (78 páginas)Se analizan las principales acciones que realizó el
Instituto Nacional de las Mujeres en el periodo de 2001-2006 y cuyo objetivo principal es lograr la plena igualdad para hombres y mujeres, en términos de acceso a las
oportunidades, eliminación de la discriminación y erradicación de la violenci
Photosynthetic active radiation, solar irradiance and the CIE standard sky classification
Plant growth is directly related to levels of photosynthetic photon flux density, Qp.
The improvement of plant-growth models therefore requires accurate estimations of the Qp parameter
that is often indirectly calculated on the basis of its relationship with solar irradiation, RS, due to
the scarcity of ground measurements of photosynthetic photon flux density. In this experimental
campaign in Burgos, Spain, between April 2019 and January 2020, an average value of the Qp/Rs ratio
is determined on the basis of measurements at ten-minute intervals. The most influential factor in the
Qp/Rs ratio, over and above any daily or seasonal pattern, is the existence of overcast sky conditions.
The CIE standard sky classification can be used to establish an unequivocal characterization of the
cloudiness conditions of homogeneous skies. In this study, the relation between the CIE standard sky
type and Qp/Rs is investigated. Its conclusions were that the Qp/Rs values, the average of which
was 1.93 0.15 mol J�����1, presented statistically significant di erences for each CIE standard sky
type. The overcast sky types presented the highest values of the ratio, while the clear sky categories
presented the lowest and most dispersed values. During the experimental campaign, only two
exceptions were noted for covered and partial covered sky-type categories, respectively, sky types
5 and 9. Their values were closer to those of categories classified as clear sky according to the CIE
standard. Both categories presented high uniformity in terms of illumination.Spanish Ministry of Science and Innovation, grant number RTI2018-098900-B-I00 and Consejería de Educación, Junta de Castilla y León, grant number BU021G1
Solar Ultraviolet Irradiance Characterization under All Sky Conditions in Burgos, Spain
Solar Ultraviolet Radiation (UVR), which is identified as a major environmental health
hazard, is responsible for a variety of photochemical reactions with direct effects on urban and
aquatic ecosystems, human health, plant growth, and the deterioration of industrial systems. Ground
measurements of total solar UVR are scarce, with low spatial and temporal coverage around the
world, which is mainly due to measurement equipment maintenance costs and the complexities of
equipment calibration routines; however, models designed to estimate ultraviolet rays from global
radiation measurements are frequently used alternatives. In an experimental campaign in Burgos,
Spain, between September 2020 and June 2022, average values of the ratio between horizontal global
ultraviolet irradiance (GHUV) and global horizontal irradiance (GHI) were determined, based on
measurements at ten-minute intervals. Sky cloudiness was the most influential factor in the ratio,
more so than any daily, monthly, or seasonal pattern. Both the CIE standard sky classification and the
clearness index were used to characterize the cloudiness conditions of homogeneous skies. Overcast
sky types presented the highest values of the ratio, whereas the clear sky categories presented
the lowest and most dispersed values, regardless of the criteria used for sky classification. The
main conclusion, for practical purposes, was that the ratio between GHUV and GHI can be used to
model GHUV.This research was funded by the Spanish Ministry of Science and Innovation, grant numbers RTI2018-098900-B-I00 and TED2021-131563B-I00, and Junta de Castilla y León, grant numbers INVESTUN/19/BU/0004 and INVESTUN/22/BU/0001
Effects of slowed gastrointestinal motility on levodopa pharmacokinetics
P. 67-72Autonomic disorders are often seen in Parkinson's disease, with disturbances of the gastrointestinal tract
occurring most frequently. These disorders, mainly a delay in gastric emptying and slowed gastrointestinal
motility, can modify the pharmacokinetics and effectiveness of drugs used to treat Parkinson's disease and
administered orally. In this study, we evaluated in a rabbit model the pharmacokinetics of levodopa
(administered with carbidopa) in the context of gastrointestinal motility slowed by the administration of an
anticholinergic drug. Levodopa+carbidopa (20:5 mg/kg) and the anticholinergic biperiden (100 μg/kg)
were orally administered to rabbits over one of two time periods (7 or 14 days) to verify the stabilization of
levodopa concentrations. The values of the area under the curve (AUC) and Cmax were higher on the final day
of treatment with an increase in AUC of 25% on day 7 and 33.4% on day 14; for Cmax, the increase was 15% on
day 7 and 12.8% on day 14. The values of AUC and Cmax were lower than those obtained when levodopa
was administered to rabbits with normal gastrointestinal motility. The values obtained for Cmin (baseline
sample obtained before administration) also increased with treatment duration (24% and 47.4% on days 7
and 14, respectively). These values were higher than those obtained in the absence of anticholinergic
administration. We conclude that, under our experimental conditions of slowed gastrointestinal motility,
levodopa absorption diminishes, and final concentrations and Cmin are higher than under conditions of
normal motility.S
Taxonomic review of selected invertebrate groups collected during the Campaigns of the Prince Albert I of Monaco in the Azorean waters.
In the late 19th and early 20th centuries Prince Albert I of Monaco promoted 13 cruises that sampled the Azorean waters. During those cruises a total of 2624 nominal marine species were reported in the area. This work assembles the biological data provided by these expeditions to the Azores in a geo-referenced database. Faunal lists for seven invertebrate groups (Echiura, Sipuncula, Cephalopoda, Annelida, Brachiopoda, Chaetognatha and Echinodermata) are compiled. The checklist includes 331 nominal species, of which 310 are valid names: 1 echiurid; 11 sipunculids; 32 cephalopods; 130 annelids; 4 brachiopods; 14 chaetognaths; and 118 echinoderms. Eighteen percent are synonyms, 29% of the species were allocated to a different genus, 2.8% were misspellings and corrections due to gender or concordance rules, 0.8% were specific epithets allocated to sub-specific level or vice-versa, the rest were validated directly (without any modification in their nomenclature)
Extension of PAR Models under Local All-Sky Conditions to Different Climatic Zones
Four models for predicting Photosynthetically Active Radiation (PAR) were obtained through MultiLinear Regression (MLR) and an Artificial Neural Network (ANN) based on 10 meteorological indices previously selected from a feature selection algorithm. One model was developed for all sky conditions and the other three for clear, partial, and overcast skies, using a sky classification based on the clearness index (kt). The experimental data were recorded in Burgos (Spain) at ten-minute intervals over 23 months between 2019 and 2021. Fits above 0.97 and Root Mean Square Error (RMSE) values below 7.5% were observed. The models developed for clear and overcast sky conditions yielded better results. Application of the models to the seven experimental ground stations that constitute the Surface Radiation Budget Network (SURFRAD) located in different Köppen climatic zones of the USA yielded fitted values higher than 0.98 and RMSE values less than 11% in all cases regardless of the sky type.This research was funded by the Spanish Ministry of Science and Innovation, grant number RTI2018-098900-B-I00, and Consejería de Empleo e Industria, Junta de Castilla y León, grant number INVESTUN/19/BU-0004
Modelling Photosynthetic Active Radiation (PAR) through meteorological indices under all sky conditions
In this study, ten-minute meteorological data-sets recorded at Burgos, Spain, are used to develop models of Photosynthetic Active Radiation () following two different procedures: multilinear regression and Artificial Neural Networks. Ten Meteorological Indices (MIs) are chosen as inputs to the models: clearness index (), diffuse fraction (), direct fraction (), Perez's clear sky index (ɛ), brightness index (), cloud cover (), air temperature (), pressure (), solar azimuth cosine (), and horizontal global irradiation (). The experimental data are clustered according to the sky conditions, following the CIE standard sky classification. A previous feature selection procedure established the most adequate MIs for modelling in clear, partial and overcast sky conditions. was the common MI used by all models and for all sky conditions. Additional variables were also included: the geometrical parameter, , and three variables related to the sky conditions, , and Both modelling methods, multilinear regression and ANN, yielded very high determination coefficients () with very close results in the models for each of the different sky conditions. Slight improvements can be observed in the ANN models. The results underline the equivalence of multilinear regression models and ANN models of PAR following previous feature selection procedures.Regional Government of Castilla y León, under projects BU021G19 and INVESTUN/19/BU/0004 and the Spanish Ministry of Science & Innovation under the I+D +i state program “Challenges Research Projects” (Ref. RTI2018-098900-B-I00). Diego Granados López expresses his thanks to the Junta de Castilla y León for economic support (PIRTU Program, ORDEN EDU/556/2019)
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