Search results for " Vertical"
showing 10 items of 163 documents
The June 2007 Saharan dust event in the central Mediterranean: Observations and radiative effects in marine, urban, and sub-urban environments
2011
Abstract A desert dust episode in June 2007 and its radiative effects on the energy budget have been studied at three Italian stations (Rome, Lecce and Lampedusa) with the aim of investigating the interactions with different conditions and aerosol types over the Mediterranean. The three sites are representative for urban (Rome), sub-urban/rural (Lecce), and marine (Lampedusa) environment, respectively in the central Mediterranean region. Measured ground-based column-averaged aerosol optical properties and aerosol extinction profiles were used to initialize the MODTRAN4 radiative transfer model. The radiative transfer model was used to estimate the shortwave aerosol radiative forcing ( ARF )…
Airborne observation of mixing across the entrainment zone during PARADE 2011
2016
This study presents the analysis of the structure and air mass characteristics of the lower atmosphere during the field campaign PARADE (PArticles and RAdicals: Diel observations of the impact of urban and biogenic Emissions) on Mount Kleiner Feldberg in southwestern Germany during late summer 2011. We analysed measurements of meteorological variables (temperature, moisture, pressure, wind speed and direction) from radio soundings and of chemical tracers (carbon dioxide, ozone) from aircraft measurements. We focus on the thermodynamic and dynamic properties that control the chemical distribution of atmospheric constituents in the boundary layer. We show that the evolution of tracer profiles…
Diel vertical movements by lotic mayfly nymphs under variable predation risk
1999
Summary 1. The diel foraging periodicities of two grazing mayfly (Ephemeroptera) nymphs, Heptagenia dalecarlica and Baetis rhodani, under variable fish (European minnow) predation risk were examined in a series of laboratory experiments. 2. Heptagenia dalecarlica were almost exclusively nocturnal in their use of feeding areas on stone tops. There was a sharp increase in the proportion of nymphs out of refuge at nightfall, both in the control and fish-odour treatments. In a treatment with freely moving fish, H. dalecarlica decreased their activity during both the day and night. In feeding trials with three freely foraging minnows, nymphs were completely safe when they had access to refuges b…
Performance of Steel Fibrous Reinforced Concrete Corbels Subjected to Vertical and Horizontal Loads
2009
A softened strut-and-tie macromodel able to reproduce the flexural behavior of corbels in plain and fibrous concrete and with the presence of steel bars, including softening of compressed struts and yielding of main and secondary steel bars, is presented in this paper. The main focus of the proposed model is the determination of the load-deflection curves of corbels subjected to the coupled effects of vertical and horizontal forces bearing in mind the influence of the type of concrete (normal or high strength), of the fiber percentage and of the arrangement and percentage of the main and secondary (horizontal stirrup) steel bars. A validation of the proposed model is made therefore with ref…
La resale price maintenance nel commercio librario. Limitare la concorrenza per promuovere la cultura?
2013
Traendo spunto dalle vicende della legge n. 128/2011, che limita lo sconto massimo praticabile al pubblico sul prezzo di copertina dei libri, pprovata con largo consenso e presto abrogata nell’indifferenza generale, l’articolo propone una approfondita analisi del modello nel quale tale legge si inscrive e delle soluzioni alternative che si riscontrano nel contesto europeo. L’indagine intende, quindi, riflettere sulla fondatezza degli assunti tradizionalmente posti alla base della difesa della Rpm libraria. Taking the cue from the events of the Law n. 128/2011, limiting the discounts on books cover price, which was passed by broad consensus and soon implicitly repealed amid the general indif…
Cardiovascular, ventilatory and total activity responses of brown trout to handling stress
1994
Changes in total activity, heart and ventilation rates were observed in 2-year-old brown trout, following handling stress, using non-contact bioelectronic monitoring equipment. Experiments were carried out in laboratory conditions at water temperatures below 4° C, Transfer between tanks as well as 5 min restraint stress increased the total activity of fish for 24 to 48 h, after which it declined to near the pre-stress level. The transfer and struggle both elevated the heart rate for 3 to 4 days. Ventilation rate was elevated to a maximum of about 30% above the nominal level and recovered within 3 to 4 days. Both heart and ventilation rates were higher in feeding fish relative to fasting fis…
Risk factors associated with adverse fetal outcomes in pregnancies affected by Coronavirus disease 2019 (COVID-19): a secondary analysis of the WAPM …
2020
Abstract Objectives To evaluate the strength of association between maternal and pregnancy characteristics and the risk of adverse perinatal outcomes in pregnancies with laboratory confirmed COVID-19. Methods Secondary analysis of a multinational, cohort study on all consecutive pregnant women with laboratory-confirmed COVID-19 from February 1, 2020 to April 30, 2020 from 73 centers from 22 different countries. A confirmed case of COVID-19 was defined as a positive result on real-time reverse-transcriptase-polymerase-chain-reaction (RT-PCR) assay of nasal and pharyngeal swab specimens. The primary outcome was a composite adverse fetal outcome, defined as the presence of either abortion (pre…
Obstetric-Neonatal Care during Birth and Postpartum in Symptomatic and Asymptomatic Women Infected with SARS-CoV-2: A Retrospective Multicenter Study
2022
Este artículo se encuentra disponible en la siguiente URL: https://www.mdpi.com/1660-4601/19/9/5482 Este artículo de investigación pertenece a la colección "COVID-19 Research". En este artículo de investigación también participan: Laura Andreu-Pejó, Cristina Martínez-Porcar, Carmen Rodríguez Gonzálvez, Patricia Torrent-Ramos, Nieves Asensio-Tomás, Yolanda Herraiz-Soler, Ramon Escuriet y Desirée Mena-Tudela. This study analyses the obstetric–neonatal outcomes of women in labour with symptomatic and asymptomatic COVID-19. A retrospective, multicenter, observational study was carried out between 1 March 2020 and 28 February 2021 in eight public hospitals in the Valencian community (Spain). The…
Direct measurement of NO<sub>3</sub> reactivity in a boreal forest
2017
Abstract. We present the first direct measurements of NO3 reactivity (or inverse lifetime, s−1) in the Finnish boreal forest. The data were obtained during the IBAIRN campaign (Influence of Biosphere-Atmosphere Interactions on the Reactive Nitrogen budget) which took place in Hyytiälä, Finland during the summer/autumn transition in September 2016. The NO3 reactivity was generally very high with a maximum value of 0.94 s−1 and displayed a strong diel variation with a campaign-averaged nighttime mean value of 0.11 s−1 compared to a daytime value of 0.04 s−1. The highest nighttime NO3-reactivity was accompanied by major depletion of canopy level ozone and was associated with strong temperature…
La vulnerabilidad profesional femenina a la vuelta de la esquina. El caso del personal de administración y servicios de la Universitat de València
2013
En este artículo se describe la situación de un sector de la comunidad universitaria que, hasta hace muy poco tiempo, apenas había sido tratado desde la perspectiva de las desigualdades de género: el personal de administración y servicios (PAS). El análisis se centra en el período comprendido entre los años 2004 y 2011 y aborda los siguientes aspectos: la presentación de las características de la estructura por edad y sexo de la plantilla del personal de administración y servicios de la Universitat de València; y la exposición de las tendencias principales relativas a la distribución según regímenes contractuales y grupos profesionales de este colectivo, atendiendo a la segregación vertical…