Search results for "Peak"

Three-Dimensional Calibration for Routine Analyses of Bromide and Nitrate Ions as Indicators of Groundwater Quality in Coastal Territories

2019

Nitrate and bromide ions are generally considered indicators of anthropogenic pollution and seawater intrusion, respectively, in the groundwater of coastal territories. The analysis of these species is generally carried out with routine chromatographic analyses which generally afford partially merged or poorly resolved peaks. In the present paper a simple method for the correct evaluation of their concentration in water is reported. This method does not imply utilization of other instruments or technologies, only the mathematical elaboration of the data obtained from routine analysis of standard solutions containing the two species. Standard binary solutions of nitrate and bromide ions at d…

Stakeholder beliefs in English-medium instruction for young learners in Sweden

2018

While several studies have investigated English-medium instruction (EMI) or content and language integrated learning (CLIL) in Swedish upper secondary and tertiary education, few have investigated such programmes in Swedish primary schools. This paper explores perceptions among staff and students about affordances and constraints in the learning of content and languages, drawing on data from a larger longitudinal case study of an English-Swedish bilingual primary class during Grades 4-6. Data consisted of semi-structured interviews with a school leader, 12 teachers and 22 students as well as fieldnotes and photographs from classroom observations. Thematic analysis of the data revealed the b…

Baltic Journal of English Language, Literature a Culture, Volume 7

2017

The Proton-Boron Reaction Increases the Radiobiological Effectiveness of Clinical Low- and High-Energy Proton Beams: Novel Experimental Evidence and …

2021

Protontherapy is a rapidly expanding radiotherapy modality where accelerated proton beams are used to precisely deliver the dose to the tumor target but is generally considered ineffective against radioresistant tumors. Proton-Boron Capture Therapy (PBCT) is a novel approach aimed at enhancing proton biological effectiveness. PBCT exploits a nuclear fusion reaction between low-energy protons and 11B atoms, i.e. p+11B→ 3α (p-B), which is supposed to produce highly-DNA damaging α-particles exclusively across the tumor-conformed Spread-Out Bragg Peak (SOBP), without harming healthy tissues in the beam entrance channel. To confirm previous work on PBCT, here we report new in-vitro data obtained…

Response of Chinese Hamster V79 Multicellular Spheroids Exposed to High-Energy Carbon Ions

2004

Chinese hamster V79-379A spheroids 200 +/- 30 microm (+/- SD) in diameter were irradiated in agitated medium in different oxygen atmospheres with (1) 227 MeV/nucleon (12)C(+6) ions (plateau region) to model tissue in the entrance channel during therapy, (2) carbon ions in the extended Bragg peak modeling tissue in the target volume, or (3) X rays as a reference modality. Cell survival curves were similar for modes (1) and (3), indicating the absence of a contact effect and the presence of a pronounced oxygen effect with oxygen enhancement ratios (OERs) of 2.8 and 2.9, respectively. In contrast, the oxygen effect was substantially smaller in mode (2) with an OER of 1.4. Under normal or restr…

Constancy and evolution of an engaged writing : the work of Carmen de Burgos, journalist, essayist and novelist

2016

Carmen de Burgos died in 1932, leaving behind a considerable amount of written material: thousands of articles published in different newspapers, essays, novels and hundreds of “novelas cortas”. The works and the memory of this women’s rights activist were doomed to oblivion during Franco’s dictatorship. This thesis aims to rediscover and analyse these works from its various perspectives. We have been looking for the constant trends but also the evolutions. Carmen de Burgos has indeed evolved in her conception of the woman’s role and of the rights she had to acquire. In the early stages of her fight, she had been mainly focusing on the acquisition of equalitarian legal and social rights. Sh…

Anthropology of Political, Social and Cultural Memory: Practices in Central and Eastern Europe: Program & Abstracts : International Scientific Confer…

2020

Perceptual similarity between color images using fuzzy metrics

2016

A method to measure the similarity between color images is proposed.Correlation among the color image channels is taken into account.Proposed similarity measure is based on fuzzy metrics because of their advantages.The proposal matches well with the perceptual visual similarity between color images. In many applications of the computer vision field measuring the similarity between (color) images is of paramount importance. However, the commonly used pixelwise similarity measures such as Mean Absolute Error, Peak Signal to Noise Ratio, Mean Squared Error or Normalized Color Difference do not match well with perceptual similarity. Recently, it has been proposed a method for gray-scale image s…

Assessing interactional skills in a paired speaking test : raters’ interpretation of the construct

2019

The operationalization of interactional competence (IC) within the paired speaking test format allows for a range of interactional skills to be tested. However, in terms of assessment, challenges are posed with regard to the co-constructed nature of IC, making investigations into raters’ perceptions of the construct essential to inform test score interpretation. This qualitative study explores features of IC that raters attended to as they evaluated performances in a paired speaking test, part of a Swedish national test of English as a Foreign Language (EFL). Two groups of raters, 17 EFL teachers from Sweden, using national standards based on the Common European Framework of Reference for L…

Trait anxiety, experience, and the public speaking state responses of Finnish university students

1997

This study focuses on the public speaking state responses among 47 Finnish subjects. Cognitive, behavioral, and physiological components of stale‐responses were investigated in relation to speakers’ trait communication anxiety and amount of previous experience speaking in public. Trait communication anxiety was found to correlate significantly with the cognitive aspect of state response, whereas amount of previous experience was found to be reflected in subjects’ heart rates. Characteristics of the Finnish speech culture and educational system are discussed when interpreting the results.