12,728 research outputs found
Calcium Triplet Synthesis
We present theoretical equivalent widths for the sum of the two strongest
lines of the Calcium Triplet, CaT index, in the near-IR, using evolutionary
techniques and the most recent models and observational data for this feature
in individual stars. We compute the CaT index for Single Stellar Populations
(instantaneous burst, standard Salpeter-type IMF) at four metallicities,
Z=0.004, 0.008, 0.02 (solar) and 0.05, and ranging in age from very young
bursts of star formation (few Myr) to old stellar populations, up to 17 gyr,
representative of globular clusters, elliptical galaxies and bulges of spirals.
The interpretation of the observed equivalent widths of CaT in different
stellar systems is discussed. Composite-population models are also computed as
a tool to interpret the CaT detections in star-forming regions, in order to
disantangle between the component due to Red Supergiants stars, RSG, and the
underlying, older, population. CaT is found to be an excellent
metallicity-indicator for populations older than 1 Gyr, practically independent
of the age. We discuss its application to remove the age- metallicity
degeneracy, characteristic of all studies of galaxy evolution based on the
usual integrated indices (both broad band colors and narrow band indices). The
application of the models computed here to the analysis of a sample of
elliptical galaxies will be discussed in a forthcoming paper (Gorgas et al.
1998).Comment: 17 pages, 7 figures, to be published in A&
On the potential contribution of rooftop PV to a sustainable electricity mix: the case of Spain
This work evaluates the potential contribution of rooftop PV to the future
electricity mix. Several sustainable scenarios are considered, each comprising
different shares of centralized renewables, rooftop PV and storage. For each
generation scenario, the storage capacity that balances the net hourly demand
is determined, and the portfolio combination that minimizes the cost of
supplying electricity is obtained. The analysis is applied to mainland Spain,
using public information and detailed granular models, both in time (hourly
resolution) and space (municipal level). For the Spanish case, when the
flexibility of hydro and biomass generation is taken into account, the
least-cost portfolio involves rather modest storage capacities, in the order of
daily rather than seasonal values. This shows that a sustainable, almost
emissions-free electricity system for Spain is possible, at a cost that can be
even lower than current wholesale market prices.Comment: 7 tables & 11 figures in the main body (24 pages), and 13 pages for
the supplementary material, wit
El fruto del Baobab: as escolhas e as encruzilhadas culturais
IX Congresso Brasileiro de Hispanistas realizado nos dias 22 a 25 agosto 2016Esta comunicação oferece, em linhas gerais, algumas reflexões sobre a teoria e a prática da tradução
quando ambas se encontram nas encruzilhadas da tarefa tradutória de um texto inédito em
português. El fruto del Baobab, escrito por uma Maite Carranza, autora contemporânea espanhola,
antropóloga de formação e com trabalho de campo realizado na Gambia, é o texto que dispara estas
reflexões e vai abordar o choque não somente entre culturas, mas entre gerações ao problematizar
temas relacionados ao universo existencial feminino com um estilo fluido bem caracterizado nos
capítulos curtos que imprimem velocidade à leitura e revelam o perfil da escritoraroteirista. Sua
composição está impregnada por amplos termos da cultura africana, mulçumanos, linguagem
coloquial e especializada de tal forma que o processo tradutório se perfila, tal como a escritura
textual, sob a consideração de múltiplos aspectos até alcançar a particularidade de uma expressão
particular, também pelo contraponto, no seio de uma cultura distinta sem assumir uma postura
reivindicatória parcial. Ao assinalar e selecionar os embates das escolhas tradutórias, observase
como entram em relação as redes semânticas, com suas armadilhas, perdas e ganhos que
constituíram uma vez a escritura do texto e voltam a movimentarse na prática significante do texto
traduzidoUNILA-UNIOEST
Do They Want to Regulate Online Profiling?
Online profiling or behavioural tracking is the process by which private companies track and gather data about users’ activities in online platforms. The data collected by all the companies is aggregated with the purpose of creating a comprehensive profile about users. Since at least 15 years ago, there have been several attempts to regulate online profiling in order to reduce its privacy implications. In general, these regulations have tried to limit the way the information is used, the type of data that is collected, and impose or suggest the security standards that the companies should take to protect it.
This article will demonstrate that the proposed regulations do not reduce online profiling’s privacy repercussions. In addition, it will argue that in order to reduce privacy repercussions it is necessary to regulate the aggregation and commercialization of the data. However, governments, industries, and users may not have enough incentives to find alternative methods or effective regulations to address the problems raised by online profiling
Psychological Effects of Training in Martial Arts After Interpersonal Trauma
Individuals who experience a traumatic event may have an adverse emotional reaction that negatively impacts their quality of life. The purpose of this qualitative phenomenological study was to explore the influence of training in the martial arts as an intervention in the treatment of interpersonal trauma. The biopsychosocial model provided the framework for the study. The research questions addressed the effects of training in the martial arts and the biological, psychological, and social functioning of individuals who had sustained a form of interpersonal trauma. Data were collected from semistructured interviews with 9 participants. Data were analyzed using Moustakas\u27s modified van Kamm method. Findings indicated that martial arts training was transformative and positive for participants. Benefits included mentorship, a sense of achievement, increased confidence, better parenting, and recovery from substance abuse. Findings may be used to promote martial arts training as a treatment intervention for people who have experienced interpersonal trauma
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