Search results for " BN"

Ab initio simulations on the atomic and electronic structure of single-walled BN nanotubes and nanoarches

2009

To simulate the perfect single-walled boron nitride nanotubes and nanoarches with armchair- and zigzag-type chiralities and uniform diameter of � 5 nm, we have constructed their one-dimensional (1D) periodic models. In this study, we have compared the calculated properties of nanotubes with those for both hexagonal and cubic phases of bulk: bond lengths, binding energies per B–N bond, effective atomic charges as well as parameters of total and projected one-electron densities of states. For both phases of BN bulk, we have additionally verified their lattice constants. In the density functional theory (DFT), calculations performed using formalism of the localized Gaussian-type atomic functio…

Potentialities of High-Resolution 3-D CZT Drift Strip Detectors for Prompt Gamma-Ray Measurements in BNCT

2022

Recently, new high-resolution cadmium–zinc–telluride (CZT) drift strip detectors for room temperature gamma-ray spectroscopic imaging were developed by our group. The CZT detectors equipped with orthogonal anode/cathode collecting strips, drift strips and dedicated pulse processing allow a detection area of 6 × 20 mm2 and excellent room temperature spectroscopic performance (0.82% FWHM at 661.7 keV). In this work, we investigated the potentialities of these detectors for prompt gamma-ray spectroscopy (PGS) in boron neutron capture therapy (BNCT). The detectors, exploiting the measurement of the 478 keV prompt gamma rays emitted by 94% 7Li nuclides from the 10B(n, α)7…

MAVIE-Lab Sports: a mHealth for Injury Prevention and Risk Management in Sport

2018

International audience; Smart-phones technology and the development of mHealth (Mobile Health) applications offer an opportunity to design intervention tools to influence health behavior changes. The MAVIE-Lab is a mHealth application including a DSS (Desicion Support System) to assist in the personalized evaluation of HLIs (Home, Leisure and Sport Injuries) risk and to promote the adoption of prevention measures. MAVIE-Lab Sports will be the first module of the mobile application. The purpose of this PhD project is to improve a particular module of MAVIE-Lab, devoted to sports (MAVIE-Lab Sports), in different aspects: statistical modeling, design and ergonomics. It also aims to evaluate sy…

Caratterizzazione del campo misto neutroni-gamma nella colonna termica del reattore TRIGA di Pavia tramite attivazione neutronica e rivelatori ad ala…

2014

Determination of gamma component in thermal column of Pavia Triga reactor by using alanine ESR detectors

2014

Heteropolyacids supported on C3N4 and BN: Comparison between catalytic and photocatalytic alcohol dehydration

«Il sunt si biaus que c'en est une mervoie a voir». Zoologie e teratologie nel Devisement dou monde

2016

L’articolo ha come oggetto le descrizioni animali e teratologiche del Devisement dou monde. In particolare, la fauna poliana con le sue estremizzazioni mostruose e meravigliose viene indagata sul doppio filo del testo franco-italiano del Devisement (accompagnato, laddove necessario, dall’ausilio delle redazioni toscana e latina) e dell’iconografia rappresentata dalle miniature contenute in quattro codici del Devisement/Milione (mss. Royal 19 D I, Bodley 264, BNF fr. 2810, Arsenal 5219). The present article investigates animal and teratological descriptions of theDevisement dou monde. Particularly, Marco Polo’s fauna and its monstrous and marvelous extremes are explored both in the Franco-It…

The spoken core of British English: a diachronic analysis based on the BNC

2008

This research takes as its starting point a frequency analysis of the demographicspoken subcorpus of the British National Corpus in order to focus on two aspects of the evolution of spoken core vocabulary in British English. The first is the impact on the core of contact with other languages and, the second, the role of lexical innovation and/or replacement in the history of this core. Our analysis, which, to a certain extent, follows up on that carried out in Fuster (2007) questions the hypothesis that the spoken core is immune to foreign influence or that it is highly resistant to change. pennock@uv.es; fuster@uv.es

Early and Longitudinal Humoral Response to the SARS-CoV-2 mRNA BNT162b2 Vaccine in Healthcare Workers: Significance of BMI, Adipose Tissue and Muscle…

2022

Background: This study aimed to investigate the early and longitudinal humoral response in Healthcare Workers (HCWs) after two doses of the BNT162b2 vaccine and to assess the association between metabolic and anthropometric parameters and the humoral response after vaccination. Methods: The study included 243 fully vaccinated HCWs: 25.50% previously infected with SARS-CoV-2 (with prior history of COVID-19—PH) and 74.40%—uninfected, seronegative before the first vaccination (with no prior history of COVID-19—NPH). IgG antibodies were measured, and sera were collected: prior to the vaccination, 21 days after the first dose, and 14 days and 8 months after the second dose. Res…

Alkane dehydrogenation on defective BN quasi-molecular nanoflakes: DFT studies

2020

Lower alkanes are feedstocks readily available but relatively inert. The con- version of low cost alkanes to industrially relevant alkenes is usually carried out on metal-based heterogeneous catalysts. Considering both the cost and the potential harmfulness of the metal involved in the dehydrogenation cat- alysts (typically, platinum or chromium), the study of metal-free processes represents an important challenge for the industrial chemistry in order to address more sustainable protocols and different routes either to activate or transform alkanes. Framed in this context, it was investigated, using a den- sity functional theory approach, the potential dehydrogenation activity of de- fectiv…