Search results for "PEAK"

Electrochemical dating of archaeological gold based on refined peak current determinations and Tafel analysis

2020

Abstract This report proposes a refined method to date archaeological gold samples based on the Tafel analysis of the ascending part of voltammetric curves corresponding to the oxidation of surface flakes of gold in contact with hydrochloric acid aqueous electrolyte. This allows estimating the equilibrium potential of gold oxidation correcting for irreversibility effects. This equilibrium potential can be correlated with the coverage of adsorbed oxygen species and hence the estimated age of the gold samples. A satisfactory potential/time calibration graph was constructed from a set of archaeological samples including two sets of samples from the Mapungubwe Gold Collection, South Africa (120…

Overview of the JET results in support to ITER

2017

The 2014–2016 JET results are reviewed in the light of their significance for optimising the ITER research plan for the active and non-active operation. More than 60 h of plasma operation with ITER first wall materials successfully took place since its installation in 2011. New multi-machine scaling of the type I-ELM divertor energy flux density to ITER is supported by first principle modelling. ITER relevant disruption experiments and first principle modelling are reported with a set of three disruption mitigation valves mimicking the ITER setup. Insights of the L–H power threshold in Deuterium and Hydrogen are given, stressing the importance of the magnetic configurations and the recent m…

Accommodating Teachers Attitudes Towards New Educational Testing Paradigms Through the OPENPAU Project

2015

Abstract Testing is an issue of increasing importance. While for many teachers language learning should be communicative; in fact, they expect their students to provide evidence of their knowledge. Thus, there is a clear mismatch on the approach to language teaching and language testing. As a consequence, there is an evident need change the testing paradigms. Purpose of the paper: This paper suggests guidelines that are currently researched in the OPENPAU project to change the teachers’ perspective towards oral testing. Sources of Evidence: Evidence was obtained through the interaction of four expert teachers with experience in oral testing. Analysis and results: The study indicates that te…

Senti chi parla. Su un aspetto dell’attività di parola a partire da Lacan.

2017

Determining Probability Distribution of Hillslope Peak Discharge by Using an Analytical Solution of Kinematic Wave Time of Concentration.

2016

Hillslope hydrology is fundamental for understanding the flood phenomenon and for evaluating the time of concentration. The latter is a key variable for predicting peak discharge at the basin outlet and for designing urban infrastructure facilities. There have been a multitude of studies on the hydrologic response at the hillslope scale, and the time of concentration has been derived for different approaches. One approach for deriving hillslope response utilizes, in a distributed form, the differential equations of unsteady overland flow, specifically developed at the hydrodynamic scale, in order to account for the spatial heterogeneity of soil characteristics, topography, roughness and veg…

Load Demand Analysis of Nordic Rural Area with Holiday Resorts for Network Capacity Planning

2019

Most of the Nordic holiday resorts are in rural area with low capacity distributed network. The rural area network is weak and needs capacity expansion planning as the load demand of this area are going to increase due to penetration of electric vehicles and heat pumps. Such type of rural network can also be operated as a micro-grid, and therefore load analysis is required for appropriate operation. The load analysis will also be useful for finding proper sizing of distributed energy resources including energy storage. In this work, load demand analysis of a typical Nordic holiday resorts, connected in rural grid, is presented to find out the load variation during the usage periods. The loa…

Christina Rossetti’s Speaking Likenesses: Different Forms of Travel in Victorian Children’s Literature

2011

Este artículo afirma que el interés victoriano por la reescritura de la literatura infantil va de la mano con su interés por la narrativa de viajes y de aventuras. Con la interpretación de diferentes formas de reescritura y de viajes, la edad de oro de la literatura infantil pone en relación el pasado y el presente. Dado que, tanto el acto de reescribir como el del viaje se encuentran en un lugar entremedias —entre pasado y presente, cerca y lejos, el texto original y su adaptación—, sugiero que la reescritura y el viaje colaboran en la narrativa infantil a la representación de la mujer errante e irónica. La primera parte del artículo describe la tradición de la narración y la adaptación de…

Enantioseparations with polysaccharide-based chiral stationary phases in HPLC. Application to the enantioselective evaluation of the biodegradability…

2023

The chiral nature of living systems has obvious implications for the biologically active compounds that interact with them. At the molecular level, chirality represents an intrinsic property of the essential building blocks of life, such as amino acids and sugars, and therefore, of peptides, proteins, enzymes, carbohydrates, nucleosides and a number of alkaloids and hormones. As a consequence, processes mediated by biological systems are stereochemistry-sensitive, and a pair of enantiomers can have different effects on living organisms. The scientific community has been studying the implications of chirality for life for more than a century. Today, it is still a topic of active research and…

Tēlainas valodas elementi TED prezentācijās

2020

Šī bakalaura darba mērķis bija atklāt, kāds ir iemesls, kāpēc epiteti, metaforas un hiperbolas tiek izmantotas TED prezentācijās, kas tālāk iedalās kādu epitetu un metaforu veidi tika izmantoti šajās prezentācijās, un atklāt, kad šie trīs specifiskie tēlainas valodas elementi tiek izmantoti. Izpētot šī pētījuma teorētisko daļu, kas sastāvēja no vairāku autoru sniegtajām definīcijām, tika secināts, ka šie trīs tēlainas valodas elementi publiskajās runās veic ievērojamu lomu, pievienojot tēlainību, vērš uzmanību un izplata informāciju. Un pēc daudzu TED prezentāciju videoierakstu novērošanas, divdesmit no tām tika izvēlētas tālākai izmeklēšanai, kur kļuva skaidrs, ka visi no tiem ietver vairā…

Prediction of Peak Shape and Characterization of Column Performance in Liquid Chromatography as a Function of Flow Rate

2015

Traditionally, column performance in liquid chromatography has been studied using information from the elution of probe compounds at different flow rates through van Deemter plots, which relate the column plate height to the linear mobile phase velocity. A more recent approach to characterize columns is the representation of the peak widths (or the right and left peak half-widths) for a set of compounds versus their retention times, which, for isocratic elution, give rise to almost linear plots. In previous work, these plots have been shown to facilitate the prediction of peak profiles (width and asymmetry) with optimization purposes. In this work, a detailed study on the dependence of the …