Search results for "massa"
showing 10 items of 396 documents
Occurrence and recovery potential of rare earth elements in Finnish peat and biomass combustion fly ash
2019
Rare earth elements (REEs) are highly important in the modern society as a result of their wide use in various fields of industry. Their high supply risk and increase in demand has led to classification as critical materials, and consequently, new resources for REEs are being prospected widely. Coal fly ash has been suggested as a possible secondary resource for REEs, but very little information is available regarding REE occurrence in biomass or peat derived fly ash. In this paper, fly ash samples from commercial power plants using peat and biomass as fuel were studied for REEs. The average concentration of REEs was 530 ppm, with up to 920 ppm in one fly ash. Five out of seven fly ashes we…
Modelling anaerobic biomass growth kinetics with a substrate threshold concentration.
2004
Abstract Many bacteria have been observed to stop growing below a certain substrate threshold concentration. In this study, a modification of the Monod kinetics expression has been proposed to take into account this substrate threshold concentration observed in bacterial growth. Besides the threshold concentration no additional parameters have been added to the kinetic expression and so, only the substrate threshold concentration and the half-saturation constant have to be estimated for model calibration purposes. Furthermore, for parameter estimation purposes, practical identifiability of this new function has been studied and the results have been satisfactory. The new model has been appl…
The use of blogs as social media tools of political communication : citizen journalism and public opinion 2.0
2019
In recent years, the political arena has been transformed into a space of public debate, a phenomenon which is both evident, yet hitherto unparalleled. A new range of digital social communication tools framed within the Web 2.0 era, with the blog often proving the tool of choice, has displaced the traditional pre-eminence of the communication scenario, as previously used by the mass media, thanks to a series of more interactive, diverse and credible dynamics which place the user at the very heart of the political discussion process and facilitates processes of social mobilization and collective civic action. This study takes the above situation as its point of departure and guiding principl…
The linguistic representation of gender violence in (written) media discourse
2014
‘Woman’ is a key social actor, and a central conceptualization, in the construction of media discourses of gender-based violence. Scholarly research at the turn of the 21st century (Bengoechea 2000; Lledó 2002; Fernández Díaz 2003; Jorge 2004) showed that in the Spanish press, media discourses had a tendency to naturalize male aggression not as violence but as part of the (private) sexual arrangement between the sexes. In this paper we explore the treatment of the phrasemujer maltratada(EN ‘battered woman’) in intimate partner violence newspaper articles from 2005 to 2010. Our aims are: (i) to account for the discursive representation of violence against women (VAW) in Spanish contemporary …
Combined sensitivity to the neutrino mass ordering with JUNO, the IceCube Upgrade, and PINGU
2020
Physical review / D 101(3), 032006 (1-19) (2020). doi:10.1103/PhysRevD.101.032006
Measurement of the mass and lifetime of the Ω(−)(b) baryon
2016
A proton-proton collision data sample, corresponding to an integrated luminosity of 3 fb$^{-1}$ collected by LHCb at $\sqrt{s}=7$ and 8 TeV, is used to reconstruct $63\pm9$ $\Omega_b^-\to\Omega_c^0\pi^-$, $\Omega_c^0\to pK^-K^-\pi^+$ decays. Using the $\Xi_b^-\to\Xi_c^0\pi^-$, $\Xi_c^0\to pK^-K^-\pi^+$ decay mode for calibration, the lifetime ratio and absolute lifetime of the $\Omega_b^-$ baryon are measured to be \begin{align*} \frac{\tau_{\Omega_b^-}}{\tau_{\Xi_b^-}} &= 1.11\pm0.16\pm0.03, \\ \tau_{\Omega_b^-} &= 1.78\pm0.26\pm0.05\pm0.06~{\rm ps}, \end{align*} where the uncertainties are statistical, systematic and from the calibration mode (for $\tau_{\Omega_b^-}$ only). A measurement …
High-precision mass measurements for the rp-process at JYFLTRAP
2017
The double Penning trap JYFLTRAP at the University of Jyvaskyla has been successfully used to achieve high-precision mass measurements of nuclei involved in the rapid proton-capture (rp) process. A precise mass measurement of 31 Cl is essential to estimate the waiting point condition of 30 S in the rp-process occurring in type I x-ray bursts (XRBs). The mass-excess of 31 C1 measured at JYFLTRAP, -7034.7(3.4) keV, is 15 more precise than the value given in the Atomic Mass Evaluation 2012. The proton separation energy S p determined from the new mass-excess value confirmed that 30 S is a waiting point, with a lower-temperature limit of 0.44 GK. The mass of 52 Co effects both 51 Fe( p,γ ) 52 C…
Development of High Resolution Resonance Ionization Mass Spectrometry for Neutron Dosimetry Technique with93Nb(n,n')93mNb Reaction
2016
We have proposed an advanced technique to measure the 93mNb yield precisely by Resonance Ionization Mass Spectrometry, instead of conventional characteristic X-ray spectroscopy. 93mNb-selective resonance ionization is achievable by distinguishing the hyperfine splitting of the atomic energy levels between 93Nb and 93mNb at high resolution. In advance of 93mNb detection, we could successfully demonstrate high resolution resonant ionization spectroscopy of stable 93Nb using an all solid-state, narrowband and tunable Ti:Sapphire laser system operated at 1 kHz repetition rate. peerReviewed
Communicative differences between emergent and traditional parties: An analysis of Facebook posts from Spain’s 2015 general election campaign
2019
Social media has revolutionized political communication. It offers political parties a mass communication channel that lets them customize and create direct communication with citizens. This study analyses the posts of the main Spanish political parties on their Facebook pages during the 2015 general elections campaign. We quantitatively analyse the parties’ frequency of publication on this social network and the content of their messages through a computerized content analysis. The results indicate that traditional and emergent parties manage their Facebook pages in distinct ways.; Las redes sociales han supuesto una revolución para la comunicación política, posibilita a los partidos tener…
Heterogeneous contributions of change in population distribution of body mass index to change in obesity and underweight
2021
From 1985 to 2016, the prevalence of underweight decreased, and that of obesity and severe obesity increased, in most regions, with significant variation in the magnitude of these changes across regions. We investigated how much change in mean body mass index (BMI) explains changes in the prevalence of underweight, obesity, and severe obesity in different regions using data from 2896 population-based studies with 187 million participants. Changes in the prevalence of underweight and total obesity, and to a lesser extent severe obesity, are largely driven by shifts in the distribution of BMI, with smaller contributions from changes in the shape of the distribution. In East and Southeast Asia…