Search results for " ai"
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Chlorine partitioning in the lowermost Arctic vortex during the cold winter 2015/2016
2019
Activated chlorine compounds in the polar winter stratosphere drive catalytic cycles that deplete ozone and methane, whose abundances are highly relevant to the evolution of global climate. The present work introduces a novel dataset of in situ measurements of relevant chlorine species in the lowermost Arctic stratosphere from the aircraft mission POLSTRACC–GW-LCYCLE–SALSA during winter 2015/2016. The major stages of chemical evolution of the lower polar vortex are presented in a consistent series of high-resolution mass spectrometric observations of HCl and ClONO2. Simultaneous measurements of CFC-12 are used to derive total inorganic chlorine (Cly) and active chlorine (ClOx). The new data…
Iron as a source of color in river waters.
2015
Organic chromophores of total organic carbon (TOC) and those of iron (Fe) contribute to the color of water, but the relative contributions of colored organic carbon (COC%) and Fe (Fe%) are poorly known. In this study, we unraveled Fe% and COC% in 6128 unfiltered water samples collected from 94 Finnish river sites of contrasting catchment properties. According to regression analysis focusing on TOC alone, on average 84% of the mean TOC consisted of COC, while 16% was non-colored or below the color-detection limit. COC and Fe were much more important sources of color than phytoplankton (chlorophyll a as a proxy) or non-algal particles (suspended solids as a proxy). When COC and Fe were consid…
Effects of elevated production of autochthonous dissolved organic matter on the freely dissolved concentration of cadmium
2018
Eutrophication enhances the production of autochthonous dissolved organic matter (DOM), which is a major driving factor behind the impairment of many aquatic ecosystems. In a mesocosm study, we investigated the effects of the abundance and composition of DOM on the potential bioavailability of cadmium (Cd) caused by eutrophication, using three-dimensional excitation-emission matrix fluorescence spectroscopy integrated with tangential flow ultrafiltration technology. The complexing capacity of DOM-Cd and the sorption distribution coefficient between DOM and the bulk solution was calculated based on a 1 : 1 complexation model. The fluorescent DOM was decomposed into three components (one prot…
Levels in the interpretive optimisation of selectivity in high-performance liquid chromatography: a magical mystery tour.
2006
Interpretive approaches for selectivity optimisation, which are those supported by retention models, are able to exploit efficiently the capabilities of the chromatographic system. The resolution of a mixture is usually faced in a first trial by looking for a unique experimental condition, able to resolve all compounds in the sample. If this is not possible, the problem can be outlined with less ambitious aims, focusing on only some compounds. In an extreme case, a single analyte can be individually optimised. Current strategies that give answer to the different goals pursued in the analysis, which are classified as total, partial and specific, are reviewed. Optimisation oriented to deconvo…
Measurement of the radiation energy in the radio signal of extensive air showers as a universal estimator of cosmic-ray energy
2016
We measure the energy emitted by extensive air showers in the form of radio emission in the frequency range from 30 to 80 MHz. Exploiting the accurate energy scale of the Pierre Auger Observatory, we obtain a radiation energy of 15.8±0.7(stat)±6.7(syst) MeV for cosmic rays with an energy of 1 EeV arriving perpendicularly to a geomagnetic field of 0.24 G, scaling quadratically with the cosmic-ray energy. A comparison with predictions from state-of-the-art first-principles calculations shows agreement with our measurement. The radiation energy provides direct access to the calorimetric energy in the electromagnetic cascade of extensive air showers. Comparison with our result thus allows the d…
Pagaidu aizsardzība pret vardarbību
2016
Eiropas Komisija nāca klajā ar priekšlikumu Eiropas Parlamenta un Padomes Regulai par aizsardzības pasākumu civiltiesīb ās savstarpēju atzīšanu. Regula neuzlika par pienākumu Latvijai ieviest šādā veida institūtu, tomēr Latvijai būtu jāīsteno citu Eiropas Savienības valstu pieľemtie aizsardzības pasākumi pret vardarbību. Darbā izpētīts, ko nozīmē pagaidu aizsardzība pret vardarbību, ko tā sevī ietver, kā arī izvērtēti izdarītie grozījumi Civilprocesa likumā, izpētīta pagaidu aizsardzības pret vardarbību piemērošana un īstenošana praksē Apskatīti problēmjautājumi saistībā aktuālo tiesu praksi. Noskaidrojot, kādi likuma uzlabojumi nepieciešami un kā jaunās normas izprot Latvijas tiesas.
Aktuālas tiesību realizācijas problēmas : Latvijas Universitātes 69. konferences rakstu krājums
2011
Pirmais Latvijas Universitātes 69. gadskārtējās konferences juridisko zinātņu rakstu krājums. Krājuma apkopoti 48 autoru raksti, un katru no tiem ir recenzējusi divi recenzenti.
Applied Social Anthropology in the Researcher’s Own Society
2014
Professor Arne Martin Klausen (1927-) is the only social anthropologist in Norway who has tried to analyse the culture of the country as a whole. In doing this, he has explored several central themes of the country’s culture; like egalitarianism, the class journey, the strong tradition for development aid to poor countries, connected to a so-called humanitarian super-power which in its turn was an extension of Christian mission, the very wide-spread newspaper reading; however self-centered to national and local issues and finally, the collision between an elitist Olympic culture with Norwegian egalitarianism. Klausen also tried to tie some threads together in editing a collection of essays …
L'introduzione dell'articolo 387-bis del codice penale in materia di violazione dei provvedimenti di allontanamento dalla casa familiare e del diviet…
2020
Il contributo si sofferma sull'introduzione del delitto di cui all'art. 387-bis in materia di violazione dei provvedimenti di allontanamento dalla casa familiare e del divieto di avvicinamento ai luoghi frequentati dalla persona offesa.
Abstract. Towards a Theory of Cognitive Responsibility: Action, Perception and Normativity from Plato to Searle.
2011
The talk articulates the normative commitments allowing us to consider perceptual experience as a form of knowledge - that is, as a form of the human activity situated in the normative space of reason of which we can be held responsible. More specifically, John Searle's characterization of the logical structure of perceptual experiences as causally selfreferential intentional states can be developed into an account of the causal and normative-intentional aspects of experience, the genealogy of which can be traced back to Plato's Theaetetus and Meno. In these dialogues, in fact, a picture of experience as "knowledge" seems to be based on a specific "reasoning about the cause" as the specific…