5,747 research outputs found
ÂżAdministraciĂłn (A)polĂtica? El retrato y los factores de selecciĂłn del dirigente pĂșblico
This article addresses the issue of how political and administrative actors relate to each other, focusing on the selection of Senior Civil Servants as key actors to implement public policies. A literature review and documental analysis were carried out, and an on-line questionnaire was applied to Senior Civil Servants in managerial positions in Portugal between 2004 and 2011 (n = 964). The results show that, in all cases, the p-value was equal or less than.05 (p â€.05). The analysis allowed us to confirm two main criteria used for the selection of Senior Civil Servants (political and professional) and their respective factors. Despite indicating that the political criterion somehow plays a role in the selection of public officials in Portugal, the study could not confirm the hypothesis that political factors are predominant when hiring senior civil servants in the country.info:eu-repo/semantics/publishedVersio
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Bridging the 'gapâ between migrants and the banking system: an innovative business model promoting financial integration, financial stability, and profitability
The thesis probes a specific area - the banking system and the business niche concerned with migrants' remittances - and considers the flows of these people and their money in todayâs global economy (over 3% of the world's population). It argues that the banking system has failed to understand the changing "paradigm" of the migrant market and thus has not updated its business plan or business model for this business segment in response. In failing to harness the liquidity of the migrant market, the author argues, the banking industry is missing out on a potentially profitable business segment that could create financial stability within the industry and the world's economies. Furthermore, by ignoring the "gap" that exists between the financial products on offer to the migrant sector and their needs in this respect in both the host and origin countries - providing a service at "both ends of the corridor" - the industry is also in danger of losing site of its commitment to social responsibility and the financial integration of migrants. At the heart of the argument for financial stability and financial integration is the proposition that there is a lack of communication among stakeholders, namely academic and financial institutions, governments, Diaspora associations and other decision makers
The Public Administration Performance Appraisal Integrated System (SIADAP) and the Portuguese civil servants perceptions
As part of managerial reform process, in 2004 the Public Administration Performance Appraisal Integrated System (SIADAP) was set up in Portugal. This study aimed to analyze the perceptions of Portuguese civil servants on this appraisal system. A second drive was to understand how those perceptions change depending on what extent the model is perceived as fair or not. A survey was carried out and data were collected from 2066 civil servants, including managers. The results show very negative perceptions, in particular regarding SIADAPâs objectivity, transparency and fairness. Also, Kruskal-Wallis tests and post-hoc paired comparisons reveal that civil servants who see the system as âunfairâ tend to have more negative perceptions on it than those who see it as âfairâ or those who are not sure about the fairness of the system.info:eu-repo/semantics/acceptedVersio
Interplay of tidal evolution and stellar wind braking in the rotation of stars hosting massive close-in planets
This paper deals with the application of the creep tide theory (Ferraz-Mello,
Cel. Mech. Dyn. Astron. vol. 116, 109, 2013) to the study of the rotation of
stars hosting massive close-in planets. The stars have nearly the same tidal
relaxation factors as gaseous planets and the evolution of their rotation is
similar to that of close-in hot Jupiters: they tidally evolve towards a
stationary solution. However, stellar rotation may also be affected by stellar
wind braking. Thus, while the rotation of a quiet host star evolves towards a
stationary attractor with a frequency () times the orbital mean-motion
of the companion, the continuous loss of angular momentum in an active star
displaces the stationary solution towards slower values: Active host stars with
big close-in companions tend to have rotational periods larger than the orbital
periods of their companions. The study of some hypothetical examples shows that
because of tidal evolution, the rules of gyrochronology cannot be used to
estimate the age of one system with a large close-in companion, no matter if
the star is quiet or active, if the current semi-major axis of the companion is
smaller than 0.03--0.04 AU. Details on the evolution of the systems: CoRoT
LRc06E21637, CoRoT-27, Kepler-75, CoRoT-2, CoRoT-18, CoRoT-14 and on
hypothetical systems with planets of mass 1--4 M_Jup in orbit around a star
similar to the Sun are given.Comment: 22 pages, 8 figures; Publication in Ap
Comparative environmental analysis of soil sampling methods in precision agriculture for lime application in ParanĂĄ State, Brazil
Precision agriculture (PA) provides techniques that favour the localized application of
inputs allowing their rational use. This makes the PA a potential indicator of reduced operational
costs, input volume, and environmental impacts. The objective of this study was to evaluate and
compare the environmental effects of three different sampling methods used in PA for the lime
application. The first sampling method evaluated was the grid sampling (GS). It was performed
at a density of one sample per hectare in a 100Ă100 m georeferenced grid. The second method
was the directed sampling, that was performed after defining the management zones by soil
apparent electrical conductivity (ECa) using a soil electrical conductivity sensor. The lest
sampling method was the Altitude-based management zone (AMZ) sampling that was developed
based on altitude maps of the field. These sampling methods were tested in three different areas
in the south of Brazil. This study evaluated the spatial variability of the lime volume in the soil
and compared quantitatively and spatially the recommended application volumes achieved by
each sampling method. Results highlighted that the sensor-directed soil sampling method was the
alternative that would generate the lowest environmental impact
RGB vegetation indices applied to grass monitoring: a qualitative analysis
ArticleIn developing countries such as Brazil, research on low-cost remote sensing and
computational techniques become essential for the development of precision agriculture (PA),
and improving the quality of the agricultural products. Faced with the scenario of increasing
production of emerald grass (Zoysia JapĂŽnica) in Brazil, and the value added the quality of this
agricultural product. The objective of this work was to evaluate the performance of RGB (IV)
vegetation indices in the identification of exposed soil and vegetation. The study was developed
in an irrigated area of 58 ha cultivated with emerald grass at Bom Sucesso, Minas Gerais, Brazil.
The images were obtained by a RGB digital camera coupled to an remotely piloted aircraft. The
flight plan was setup to take overlapping images of 70% and the aircraft speed was 10 m s
-1
. Six
RGB Vegetation index (MGVRI, GLI, RGBVI, MPRI, VEG, ExG) were evaluated in a mosaic
resulting from the images of the study area. All of the VIs evaluated were affected by the
variability of lighting conditions in the area but MPRI and MGVRI were the ones that presented
the best results in a qualitative evaluation regarding the discrimination of vegetation and soil
Experimental Observation of Quantum Correlations in Modular Variables
We experimentally detect entanglement in modular position and momentum
variables of photon pairs which have passed through -slit apertures. We
first employ an entanglement criteria recently proposed in [Phys. Rev. Lett.
{\bf 106}, 210501 (2011)], using variances of the modular variables. We then
propose an entanglement witness for modular variables based on the Shannon
entropy, and test it experimentally. Finally, we derive criteria for
Einstein-Podolsky-Rosen-Steering correlations using variances and entropy
functions. In both cases, the entropic criteria are more successful at
identifying quantum correlations in our data.Comment: 7 pages, 4 figures, comments welcom
Indicadores para a avaliação da disponibilidade hĂdrica para o desenvolvimento sustentĂĄvel da atividade canavieira irrigada.
Para a racionalização do uso dos recursos hĂdricos e promoção do desenvolvimento sustentĂĄvel da atividade canavieira na regiĂŁo Centro-Oeste torna-se importante o desenvolvimento de procedimentos metodolĂłgicos que possam fornecer subsĂdios tĂ©cnicos para o planejamento e gestĂŁo setorial - agricultura e recursos hĂdricos. O presente trabalho apresenta dois indicadores concebidos para a avaliação do potencial da disponibilidade hĂdrica para atender a demanda projetada de ĂĄgua para o desenvolvimento da atividade canavieira
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