Carlos Costa - Profile on Academia.edu (original) (raw)

Papers by Carlos Costa

SustNMS: Towards service oriented policy-based network management for energy-efficiency

ABSTRACT Considering the increasing importance of carbon free networking solutions, several energ... more ABSTRACT Considering the increasing importance of carbon free networking solutions, several energy-efficient networking systems have been proposed and evaluated in literature. One significant challenge is how to encompass actions targeting energy savings and possible corresponding degradations in network QoS (Quality of Service). This paper presents an energy-efficient policy-based network management architecture that enables the enforcement of energy-efficiency according to high-level business decisions on how to coordinate the trade-off between energy savings and the potential impact on the network operation. The system integrates a real-time energy-efficiency assessment with a dynamic evaluation of network availability and performance. Its operation is presented and advantages are discussed.

In the context of increasing demands for social and financial accountability of universities, the... more In the context of increasing demands for social and financial accountability of universities, the required implementation of transparent faculty evaluation systems constitutes a challenge and an opportunity for universities strategically aligning the activity of academic staff with the university goals. However, despite growing interest in the performance appraisal of faculty, only a few reported studies propose models that cover the

A multi-criteria model for auditing a Predictive Maintenance Programme

â–º We propose a multi-criteria model for auditing a Predictive Maintenance Programme. â–º The mo... more â–º We propose a multi-criteria model for auditing a Predictive Maintenance Programme. â–º The model was implemented in the General Hospital of Ciudad Real in Spain. â–º It enables managers to evaluate the performance of the Programme. â–º It assists in the identification of Programme deficiencies requiring intervention. â–º It also assists in defining corrective measures for its continuous improvement.

Macbeth

This paper presents an up-to-date comprehensive overview of the MACBETH approach to multicriteria... more This paper presents an up-to-date comprehensive overview of the MACBETH approach to multicriteria decision-aid. It requires only qualitative judgements about differences of attractiveness to help a decision maker, or a decision-advisory group, quantify the relative value of options. The approach, based on the additive value model, aims to support interactive learning about evaluation problems and the elaboration of recommendations to

Risk Profiles for Leishmania infantum Infection in Brazil

The American journal of tropical medicine and hygiene, Jan 25, 2016

The aim of this study was to characterize risk profiles for Leishmania infantum infection in a po... more The aim of this study was to characterize risk profiles for Leishmania infantum infection in a population living in an area endemic for visceral leishmaniasis. A cohort study was conducted between January 2004 and December 2006 with the participation of 430 individuals living in the city of Teresina, northeast Brazil, who were initially negative for the Montenegro test. Data analysis was performed using the classification and regression tree method. The cumulative incidence (CI) of Montenegro's test conversion was 35% at 18-month follow-up. Eight different risk profiles for L. infantum infection were identified. The profile with the highest risk (CI = 75%) comprised individuals with less than 4 years of education who had never lived outside Teresina. The profile with the lowest risk (CI = 5%) included highly educated subjects who had owned a dog for 5 years or more and lived in areas that received some type of intervention. These results show that there is a high degree of compl...

Network Apparatus and Methods

Leishmania infantum Genetic Diversity and Lutzomyia longipalpis Mitochondrial Haplotypes in Brazil

BioMed Research International, 2016

Leishmania infantum is the etiological agent of visceral leishmaniasis (VL) in the Americas with ... more Leishmania infantum is the etiological agent of visceral leishmaniasis (VL) in the Americas with domestic dogs being its major reservoir hosts. The main VL vector is the sandfly Lutzomyia longipalpis, while other Lutzomyia species may play a role in disease transmission. Although the genetic structure of L. infantum populations has been widely evaluated, only a few studies have addressed this subject coupled to the genetic structure of the respective sandfly vectors. In this study, we analyzed the population structure of L. infantum in three major VL endemic areas in Brazil and associated it with Lutzomyia longipalpis geographic structure.

O Potencial do Aproveitamento do Género para o Desenvolvimento Sócio-Económico: o caso do setor do Turismo em Portugal e no Brasil

Buhalis, D., and Costa, C., (eds), 2005,Tourism Business Frontiers Butterworth Heinemann ISBN-10: 0750663774 http://goo.gl/uv1V6a

http://goo.gl/uv1V6a Buhalis, D., and Costa, C., (eds), 2005,Tourism Business Frontiers Butterwor... more http://goo.gl/uv1V6a Buhalis, D., and Costa, C., (eds), 2005,Tourism Business Frontiers Butterworth Heinemann ISBN-10: 0750663774 By Dimitrios Buhalis, Established Chair in Tourism, School of Services Management, Bournemouth University, UK Carlos Costa, University of Aveiro, Portugal As the global tourism industry continues to expand and to become more complex, it is vital that those in the industry are equipped with a thorough knowledge of all topics involved. New Tourism Consumers Products and Industry: Present and Future Issues provides this comprehensive coverage and more. Written by a team of globally renowned thinkers and researchers, it not only provides a brief historical overview of tourism, but delves deeper, to discuss emerging trends, consumer types and looks at the way the industry itself is changing and developing. It provides the manager of tomorrow with the ability to look beyond normal planning horizons and identify potential opportunities from these changes. New To...

Women in Brazil with higher education in tourism: preliminary results of the Gentour project

Approximations for Intraparticle Mass Diffusion/Convection Models: A Review

Developments in Chemical Engineering and Mineral Processing, 1996

ABSTRACT This paper presents a review of linear driving force and more complex approximations dev... more ABSTRACT This paper presents a review of linear driving force and more complex approximations developed since 1947 to simplify the intraparticle diffusion/convection mass transfer models. The results for step and cyclic particle-surface perturbations are shown, and the methodolagies used by various authors are illustrated. The presence of linar or non-linear adsorption or chemical reaction is also considered. recent Approximations for cyclic perturbations of binary Langmuir systems with complex intraparticle models (e. g. dusty gas model) are also presented. Finally, future developments both in approximations and methodologies are discussed.

can contribute to improve the use of DICOM metadata, stored over disperse PACS of radiology depar... more can contribute to improve the use of DICOM metadata, stored over disperse PACS of radiology departments, which otherwise not be used in productivity, efficiency and quality initiatives at radiology departments.

Monopolio Natural: A Legitimação Do Monopólio Para Minimizar Os Custos De Produção

O presente estudo busca fazer uma abordagem em tema cuja importância em uma sociedade capitalista... more O presente estudo busca fazer uma abordagem em tema cuja importância em uma sociedade capitalista possui grande repercussão. Destarte, na análise que ora se apresenta inicia-se com a dicotomia Direito/Economia e a ligação existente entre as disciplinas mencionadas. Posteriormente, passa-se à argumentação atinente às duas estruturas de mercado existentes: concorrência perfeita e o monopólio. Demonstrada a impossibilidade de ocorrência, na

The Future of Deforestation in the

Concern about the future of Amazonian forests is growing as both the extent and rate of primary f... more Concern about the future of Amazonian forests is growing as both the extent and rate of primary forest destruction increase. We combine spatial information on various biophysical, demographic and infrastructural factors in the Brazilian Amazon with satellite data on deforestation to evaluate the relative importance of each factor to deforestation in the region. We assess the sensitivity of results to

Proceedings of the 26th Annual International Conference on Design of Communication, SIGDOC 2008, Lisbon, Portugal, September 22-24, 2008

Developments in Earth Surface Processes, 2009

Regioselective Synthesis of Pyrazoles from β-Oxo Thioxoesters and α-Oxoketene O , N -Acetals

Synfacts, 2007

Desempenho em FI com humanos: efeito do tipo de reforçador I

The study investigated the effect of the type of reinforcer on human performances in FI maintaine... more The study investigated the effect of the type of reinforcer on human performances in FI maintained by points. University students were exposed initially to a FI 10s reinforcement schedule. Subsequently, the FI parameter was changed to 5, 20 or 30s. To some participants the points were exchanged by photocopies (Condition 1), to others points were exchanged for money (Condition 2),

Biota Neotropica, 2002

IRecent studies suggest that deforestation rates in the Brazilian Amazon could increase sharply i... more IRecent studies suggest that deforestation rates in the Brazilian Amazon could increase sharply in the future as a result of over $40 billion in planned investments in highway paving and major new infrastructure projects in the region. These studies have been challenged by several Brazilian ministries, which assert that recent improvements in environmental laws, enforcement, and public attitudes have fundamentally reduced the threat posed to forests by such projects. We tested the notion that hazards to Amazonian forests have declined over the last decade by assessing available data on deforestation rates from 1978 to 2000. Although the alarmingly high rate of forest loss from 1978-1989 (1.98 million ha yr 1-1 ) declined somewhat from 1990-1994 (1.38 million ha yr ), it rebounded to a high level from 1995-2000 (1.90 million ha -1 yr ). M oreover, correlation and regression analyses reveal that both absolute and per-capita rates of forest loss accelerated significantly over the last decade. These trends fail to support the assertion that deforestation pressure in Amazonian forests has been brought under control. We suggest that poor enforcement of existing environmental laws, rapidly expanding logging and mining industries, increasing population pressure, and other challenges are greatly hindering efforts to limit the environmental impacts of development activities in Brazilian Amazonia.