6,153 research outputs found
Apologues and fables as educational resources on earth sciences
Comunicação apresentada ao VIII Congresso Nacional de Geologia, em Braga (9-16 de Julho 2010)O presente trabalho visa dar a conhecer a literatura infantil editada no âmbito do Programa de
Divulgação no triénio dedicado ao Ano Internacional do Planeta Terra (AIPT), em Portugal (2007-2009),
a que o Comité Português para o AIPT deu o seu apoio institucional – representada por apólogos e fábulas
inovadores, cujos protagonistas e/ou enredos remetem para o conhecimento no âmbito de várias
disciplinas das Ciências da Terra, entre outras –, bem como destacar o papel que tais narrativas podem
desempenhar como recursos educativos pertinentes para a promoção de um desenvolvimento sustentável.This paper aims to promote children’s literature published in the framework of the Outreach
Programme during the three years dedicated to the International Year of Planet Earth (IYPE), in
Portugal (2007-2009), which the Portuguese Committee for IYPE gave its institutional support –
represented by innovative apologues and fables, whose protagonists and/or plots refer to the knowledge
of several disciplines within the Earth Sciences, among others - as well as highlighting the role that such
narratives can play as educational resources relevant to the promotion of sustainable development
Long-Term Visual Object Tracking Benchmark
We propose a new long video dataset (called Track Long and Prosper - TLP) and
benchmark for single object tracking. The dataset consists of 50 HD videos from
real world scenarios, encompassing a duration of over 400 minutes (676K
frames), making it more than 20 folds larger in average duration per sequence
and more than 8 folds larger in terms of total covered duration, as compared to
existing generic datasets for visual tracking. The proposed dataset paves a way
to suitably assess long term tracking performance and train better deep
learning architectures (avoiding/reducing augmentation, which may not reflect
real world behaviour). We benchmark the dataset on 17 state of the art trackers
and rank them according to tracking accuracy and run time speeds. We further
present thorough qualitative and quantitative evaluation highlighting the
importance of long term aspect of tracking. Our most interesting observations
are (a) existing short sequence benchmarks fail to bring out the inherent
differences in tracking algorithms which widen up while tracking on long
sequences and (b) the accuracy of trackers abruptly drops on challenging long
sequences, suggesting the potential need of research efforts in the direction
of long-term tracking.Comment: ACCV 2018 (Oral
Foraminifers from the Lower-Middle Jurassic boundary of the Lusitanian Basin: Murtinheira section (North Sector) and Zambujal de Alcaria section (Central Sector)
Comunicação apresentada ao VIII Congresso Nacional de Geologia, em Braga (9-16 de Julho 2010)análise da diversidade taxonómica e das abundâncias relativas nas associações de
foraminíferos da passagem Jurássico Inferior-Médio em dois sectores da Bacia Lusitânica indica que tais
associações apresentam diferenças nas suas composições, aparentemente homogéneas. Assim, as
associações de zonas proximais (perfil de Zambujal de Alcaria) são mais abundantes e com maior
diversidade que as registadas em zonas distais (perfil da Murtinheira). Além disso, a maioria dos taxa
comuns em ambas as zonas apresentam diferenças nas suas abundâncias relativas, que parecem resultar
de preferências paleo-ambientais distintas.The analysis of diversity and relative abundances of foraminiferal assemblages from two
sections located in the Lusitanian Basin, and corresponding to the Lower-Middle Jurassic boundary,
shows that these apparently homogeneous assemblages present differences in their composition.
Assemblages from shallow zones (Zambujal de Alcaria section) show higher diversity and abundance
than assemblages from deeper zones (Murtinheira section). Species recorded in both areas show distinct
values on their relative abundances, as a possible relationship with their palaeo-environmental
preferences
Determination of phytoextraction potential of plant speciesfor toxic elements in soils of abandoned sulphide-mining areas
This study has determined contamination levels in soils and plants from the Sa˜o Domingos mining area, Portugal, by k0-INAA. Total concentrations of As, Sb, Cr, Hg, Cu, Zn and Fe in soils were very high, exceeding the maximum limits in Portuguese legislation. Concentrations of toxic elements like As, Sb and Zn were highest in roots of Erica andevalensis, Juncus acutus, Agrostis castellana and Nicotiana glauca. Additionally, As, Br, Cr, Fe, Sb and Zn in all organs of most plants were above toxicity levels.
Those species that accumulated relatively high concentrations of toxic elements in roots (and tops) may be cultivated for phytostabilisation of similar areas
Kan replacement of simplicial manifolds
We establish a functor from local Kan simplicial manifolds to weak Kan
simplicial manifolds. It gives a solution to the problem of extending local Lie
groupoids to Lie 2-groupoids.Comment: 19 pages, 11 figures, Lemma 2.2 improved, Prop.-Def. 2.3 modified. to
appear in Letters in Mathematical Physic
Interrelations between “Tales by Mrs. Earth” and the International Year of Planet Earth
Comunicação apresentada ao VIII Congresso Nacional de Geologia, em Braga (9-16 de Julho 2010)No presente trabalho apresentam-se os “Contos da Dona Terra”, uma colectânea de dez
narrativas destinadas ao público infantil, que incluem apólogos e fábulas, com conteúdos interrelacionáveis
com as dez temáticas do Ano Internacional do Planeta Terra. Esta obra, editada também em
Braille e Mirandês, visa ajudar a compreender a dinâmica da Terra, e apela à necessidade de respeitar o
planeta e os seus recursos, como forma de alcançar um futuro mais sustentável.This work presents the "Tales by Mrs. Earth" a collection of ten stories aimed at children,
including apologues and fables, with contents which may be related to the ten themes of the International
Year of Planet Earth. Edited also in Braille and Mirandês, the book aims to help understand the
dynamics of the Earth, and call for the need to respect the planet and its resources as a means of
achieving a more sustainable future
Measurement of miniband parameters of a doped superlattice by photoluminescence in high magnetic fields
We have studied a 50/50\AA superlattice of GaAs/AlGaAs
composition, modulation-doped with Si, to produce
cm electrons per superlattice period. The modulation-doping was tailored
to avoid the formation of Tamm states, and photoluminescence due to interband
transitions from extended superlattice states was detected. By studying the
effects of a quantizing magnetic field on the superlattice photoluminescence,
the miniband energy width, the reduced effective mass of the electron-hole
pair, and the band gap renormalization could be deduced.Comment: minor typing errors (minus sign in eq. (5)
Superlattice Magnetophonon Resonances in Strongly Coupled InAs/GaSb Superlattices
We report an experimental study of miniband magnetoconduction in
semiconducting InAs/GaSb superlattices. For samples with miniband widths below
the longitudinal optical phonon energy we identify a new superlattice
magnetophonon resonance (SLMPR) caused by resonant scattering of electrons
across the mini-Brillouin zone. This new resonant feature arises directly from
the drift velocity characteristics of the superlattice dispersion and total
magnetic quantisation of the superlattice Landau level minibands.Comment: 9 pages, 8 figures, submitted to Phys. Rev.
The 15-minute city concept and new working spaces: A planning perspective from Oslo and Lisbon
In the last few years, chrono-urbanism has welcomed a novel perspective, namely, that of the 15-minute city concept, which has recently emerged in the present planning debate. During the current pandemic, this has coincided with a drive to highlight the importance of merging more activities in the neighbourhood to improve urban vitality and reduce daily commuting. In addition, increasing digitalization and knowledge-intensive activities have transformed the nature of work itself, thus affecting the choice of the workplace with new working spaces (NWS) emerging for collaborative and flexible work environments. Therefore, within this context, this study discusses recent chrono-urbanism approaches applied to urban planning and the role of NWS. The phenomenon is empirically examined in Oslo and Lisbon through a qualitative analysis of planning documents and a spatial analysis. The results show that most NWS are fairly accessible by public transport to users in both cities; although the NWS neighbourhoods in Lisbon have a greater diversity of functions compared to Oslo. However, in both cities, the distribution of NWS is non-uniform. This may limit residents’ choice to live and work (outside home) in the same neighbourhood. The study contributes to the current planning debate on new urban models for sustainable neighbourhoods.info:eu-repo/semantics/publishedVersio
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