2,550 research outputs found
How impactful are public policies on environmental sustainability? Debating the Portuguese case of PO SEUR 2014–2020
Sustainable development is a key feature of national, European Union and global development strategies. The main research goal is to provide evidence on how impactful public policies on environmental sustainability in Portugal are at the regional level, in various policy areas. In this context, this paper analyses the main impacts of the Portuguese Operational Programme for Sustainability and Efficient Use of Resources (PO SEUR 2014–20). The research uses a territorial impact assessment (TIA) methodology (TARGET_TIA) to assess these impacts in five analytic dimensions (economy with low emissions, adaptation to climate change, risk prevention and management, environmental protection and resource efficiency) in the five mainland Portuguese NUTS 2. It concludes that, in overall terms, PO SEUR produced low to moderate positive impacts in all NUTS II and analysed dimensions, but it was particularly positive in measures fostering adaptation to climate change, and less impactful in measures supporting an economy with low emissions and resource efficiency in Portugal. Despite data limitations, the research provided adequate evidence that key public policies supporting environmental sustainability in Portugal are largely ineffective and inefficient in view of their policy goals and allocated funding. To turn this scenario around, the process of project selection needs to undergo significant improvements to better adjust the regional needs on environmental sustainability-related issues to the available funding. Moreover, on a policy strategic level, there needs to be support for a prosperous, modern, competitive and climate-neutral economy in Portugal via concrete actions exploring environmental capital and a green economy in urban areas.info:eu-repo/semantics/publishedVersio
Detection of Mycobacterium spp. in Coalho cheese commercialized in the city of Caicó-RN, Brazil.
Artisanal Coalho cheese is a popular dairy product, widely consumed in the Northeast region of Brazil, and is produced with raw or pasteurized milk. Microbial contamination of cheeses has very important consequences, both for the dairy industry, given the potential economic losses, and for public health, due to the risk of outbreaks of foodborne diseases. The present study aimed to detect Mycobaterium spp. in Coalho cheese commercialized in the city of Caicó-RN Brazil, using bacterial culture and molecular diagnosis. 50 samples of Coalho cheese obtained from local street market were analyzed, 35 of which were made from raw milk (artesanal cheese) and 15 with pasteurized milk (industrialized cheese)
A population of Lychnophora Ericoides Mart. (arnica) (Asteraceae) is prone to extinction in a savanna of Central Brazil.
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Previous issue date: 2018-01-16bitstream/item/171141/1/population-of-lychnophora-ericoides-mart-arnica-asteraceae-is-prone-to-extinction-in-a-savanna-of-central-brazil.pd
Efeito do consórcio cultural no manejo ecológico de insetos em tomateiro.
bitstream/item/103069/1/cot-65.pd
Fortalecimento do manejo florestal comunitário em assentamento rural na amazônia ocidental, Rondônia, Brasil.
O assentamento rural Nilson Campos, um dos mais recentes do Estado de Rondônia, localizado no Distrito de Jacy Paraná, a 90 km da capital do Estado, Porto Velho, pode ser considerado um retrato do acelerado processo de ocupação humana na região, caracterizado pelas mudanças na paisagem e no padrão de uso da terra, que tem por base uma agricultura regional continuamente apoiada em práticas de derruba e queima, consideradas mais acessíveis em termos econômicos, porém, causadoras de grandes perdas do capital natural. Preocupada com essas questões, a Embrapa Rondônia vem conduzindo, desde julho de 2005, o projeto: Organização comunitária em apoio ao manejo florestal em assentamento rural ? Jacy Paraná ? Rondônia, cujo objetivo central é preparar produtores familiares, assentados de programas da reforma agrária, para implementar o manejo florestal comunitário mediante um programa sócio-educativo que inclui quatro etapas operacionais: sensibilização, capacitação, planejamento e difusão. A partir da metodologia proposta, que inclui a participação dos produtores em grupos de estudo mediante oficinas temáticas com o uso de música como ferramenta de base para a discussão e reflexão sobre a temática ambiental, o fortalecimento do aprendizado sobre a importância, as técnicas, e o esclarecimento sobre os desafios e oportunidades da adoção do manejo florestal têm sido trabalhadas. São apresentados os principais avanços conseguidos até o momento com a formação de um grupo comunitário de estudo (GCE) local sobre manejo florestal comunitário, a realização de uma oficina de trabalho sobre os cenários futuros plausíveis com o manejo florestal no assentamento, e curso introdutório sobre manejo florestal sustentável, englobando a legislação florestal, e a importância e função de recursos madeireiros e não-madeireiros para a melhoria de suas estratégias de vida
Aharonov-Bohm signature for neutral excitons in type-II quantum dot ensembles
It is commonly believed that the Aharonov-Bohm (AB) effect is a typical
feature of the motion of a charged particle interacting with the
electromagnetic vector potential. Here we present a magnetophotoluminescence
study of type-II InP/GaAs self-assembled quantum dots, unambiguously revealing
the Aharonov-Bohm-type oscillations for neutral excitons when the hole ground
state changes its angular momentum from lh = 0 to lh = 1, 2, and 3. The hole
ring parameters derived from a simple model are in excellent agreement with the
structural parameters for this system.Comment: Revised version, 10 pages, 3 figure
The variability behavior of CoRoT M-giant Stars
For 6 years the Convection, Rotation, and Planetary Transits (CoRoT) space
mission has acquired photometric data from more than one hundred thousand point
sources towards and directly opposite from the inner and outer regions of the
Galaxy. The high temporal resolution of the CoRoT data combined with the wide
time span of the observations has enabled the study of short and long time
variations in unprecedented detail. From the initial sample of 2534 stars
classified as M-giants in the CoRoT databasis, we selected 1428 targets that
exhibit well defined variability, using visual inspection. The variability
period and amplitude of C1 stars (stars having Teff < 4200 K) were computed
using Lomb-Scargle and harmonic fit methods. The trends found in the V-I vs J-K
color-color diagram are in agreement with standard empirical calibrations for
M-giants. The sources located towards the inner regions of the Galaxy are
distributed throughout the diagram while the majority of the stars towards the
outer regions of the Galaxy are spread between the calibrations of M-giants and
the predicted position for Carbon stars. The stars classified as supergiants
follow a different sequence from the one found for giant stars. We also
performed a KS test of the period and amplitude of stars towards the inner and
outer regions of the Galaxy. We obtained a low probability that the two samples
come from the same parent distribution. The observed behavior of the
period-amplitude and period-Teff diagrams are, in general, in agreement with
those found for Kepler sources and ground based photometry, with pulsation
being the dominant cause responsible for the observed modulation. We also
conclude that short-time variations on M-Giant stars do not exist orare very
rare and the few cases we found are possibly related to biases or background
stars.Comment: 11 pages, 6 figure
Spectroscopic Study of IRAS 19285+0517(PDS 100): A Rapidly Rotating Li-Rich K Giant
We report on photometry and high-resolution spectroscopy for IRAS 19285+0517.
The spectral energy distribution based on visible and near-IR photometry and
far-IR fluxes shows that the star is surrounded by dust at a temperature of
250 K. Spectral line analysis shows that the star is a K
giant with a projected rotational velocity = 9 2 km s.
We determined the atmospheric parameters: = 4500 K, log =
2.5, = 1.5 km s, and [Fe/H] = 0.14 dex. The LTE abundance
analysis shows that the star is Li-rich (log (Li) = 2.50.15),
but with essentially normal C, N, and O, and metal abundances. Spectral
synthesis of molecular CN lines yields the carbon isotopic ratio
C/C = 9 3, a signature of post-main sequence evolution and
dredge-up on the RGB. Analysis of the Li resonance line at 6707 \AA for
different ratios Li/Li shows that the Li profile can be fitted best
with a predicted profile for pure Li. Far-IR excess, large Li abundance,
and rapid rotation suggest that a planet has been swallowed or, perhaps, that
an instability in the RGB outer layers triggered a sudden enrichment of Li and
caused mass-loss.Comment: To appear in AJ; 40 pages, 9 figure
X-ray Evidence of the Common Envelope Phase of V471 Tauri
Chandra Low Energy Transmission Grating Spectrograph observations of the
pre-cataclysmic binary V471 Tau have been used to estimate the C/N abundance
ratio of the K dwarf component for the first time. While the white dwarf
component dominates the spectrum longward of 50 AA, at shorter wavelengths the
observed X-ray emission is entirely due to coronal emission from the K dwarf.
The H-like resonance lines of C and N yield an estimate of their logarithmic
abundance ratio relative to the Sun of [C/N]=-0.38+/-0.15 - half of the
currently accepted solar value. We interpret this result as the first clear
observational evidence for the presumed common envelope phase of this system,
during which the surface of the K dwarf was contaminated by CN-cycle processed
material dredged up into the red giant envelope. We use the measured C/N ratio
to deduce that 0.015-0.04 Msun was accreted by the K dwarf while engulfed, and
show that this is consistent with a recent tentative detection of 13C in the K
dwarf photosphere, and with the measured Li abundance in the scenario where the
red giant companion was Li-rich during the common envelope phase.Comment: 6 pages, 2 figures, ApJL accepte
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