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Article ; Online: Application of a Costing Methodology to Estimate Capital Costs of Solar Thermal Systems in Residential Portuguese Context

Ana Cristina Ferreira / Ângela Silva

International Journal of Sustainable Energy Planning and Management, Vol

2020 Volume 26

Abstract: The concerns regarding the environmental damage require changes not only on how the energy is consumed but also how it is produced. The close relationship between energy use and the economic growth exposes the need for continuous monitoring of energy ... ...

Abstract	The concerns regarding the environmental damage require changes not only on how the energy is consumed but also how it is produced. The close relationship between energy use and the economic growth exposes the need for continuous monitoring of energy consumption, which cannot be achieved without assessing capital and operational costs from its conversion to end-use. Solar thermal systems offer few advantages over other renewable resources to meet the energy demand in the small-scale building sector. Solar-thermal technologies can play a leading role in meeting the decarbonisation targets set in Europe. The reports from the International Energy Agency (IEA) shows that solar heating has the potential to cover more than 16% of the low-temperature heat use in energy mix scenario. In Europe, this share might translate into 45% growth of the installed solar thermal capacity by 2020, setting a challenging target of 1 m2 of collector area installed per capita by 2020 and of 1.3 m2 by 2050. The main objective of the present work is to define a costing methodology able to estimate the capital cost of solar-thermal systems according to the system size and energy requirements of a specific residential building. The costing methodology consists of the derivation of a cost expression for each component by integrating thermodynamic and cost coefficients, adjusted for this kind of technology, and also taking into account real market data. The model was validated for a reference dwelling in Lisbon, with an occupation of 4 people with an estimated energy need of 2 037 kWh/year in terms of DHW. Results of the reference scenario show that is required at least 4 m2 of solar collector and the system cost ranges from 703.2€ per m2 to 763.2€ per m2, depending on the acceptable storage tank capacity.
Keywords	Engineering (General). Civil engineering (General) ; TA1-2040 ; Social sciences (General) ; H1-99
Subject code	690
Language	English
Publishing date	2020-04-01T00:00:00Z
Publisher	Aalborg University Press
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Cerium d -Block Element (Co, Ni) Bimetallic Oxides as Catalysts for the Methanation of CO 2

Joaquim Miguel Badalo Branco / Ana Cristina Ferreira / Joana Filipa Martinho

Catalysts, Vol 12, Iss 44, p

Effect of Pressure

2022 Volume 44

Abstract: Nickel– and cobalt–cerium bimetallic oxides were used as catalysts for the methanation of CO 2 under pressure. The catalysts’ activity increases with pressure and an increase of just 10 bar is enough to double the yield of methane and to significantly ... ...

Abstract	Nickel– and cobalt–cerium bimetallic oxides were used as catalysts for the methanation of CO 2 under pressure. The catalysts’ activity increases with pressure and an increase of just 10 bar is enough to double the yield of methane and to significantly improve the selectivity. The best results were those obtained over nickel–cerium bimetallic oxides, but the effect of pressure was particularly relevant over cobalt–cerium bimetallic oxides, which yield to methane increases from almost zero at atmospheric pressure to 50–60% at 30 bar. Both catalyst types are remarkably competitive, especially those containing nickel, which were always more active than a commercial rhodium catalyst used as a reference (5 wt . % Rh/Al 2 O 3 ) and tested under the same conditions. For the cobalt–cerium bimetallic oxides, the existence of a synergetic interaction between Co and CoO and the formation of cobalt carbides seems to play an important role in their catalytic behavior. Correlation between experimental reaction rates and simulated data confirms that the catalysts’ behavior follows the Langmuir–Hinshelwood–Hougen–Watson kinetic model, but Le Chatelier ’s principle is also important to understand the catalysts’ behavior under pressure. A catalyst recycle study was also performed. The results obtained after five cycles using a nickel–cerium catalyst show insignificant variations in activity and selectivity, which are important for any type of practical application.
Keywords	carbon dioxide ; methanation ; cerium oxide ; pressure ; preparation method ; Chemical technology ; TP1-1185 ; Chemistry ; QD1-999
Subject code	660 ; 540
Language	English
Publishing date	2022-12-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: (Re)center business in destinations:

Andreia Antunes Moura / Maria do Rosário Mira / Ana Cristina Ferreira

Finisterra - Revista Portuguesa de Geografia, Vol 57, Iss 120 (AOP) (2022)

2022

Abstract: After COVID-19, local and regional stakeholders need to generate conditions that will enable them to assert themselves in a climate of insecurity. The pandemic has triggered new paradigms of competitiveness, which drive various stakeholders linked to ... ...

Abstract	After COVID-19, local and regional stakeholders need to generate conditions that will enable them to assert themselves in a climate of insecurity. The pandemic has triggered new paradigms of competitiveness, which drive various stakeholders linked to tourist destinations to stimulate business activity, supporting their economic viability. The key issue focuses not only on appeal to tourists, but also on attracting residents and businesses. Attracting innovative businesses involves knowing the motivations of entrepreneurs and what attributes they value in tourist destinations, which drives them to invest. To answer this objective, we developed a cross-sectional study, of exploratory nature, through a self-administered survey by questionnaire, addressed to entrepreneurs in the Central Region of Portugal. Data were collected between January and May 2021, obtaining 138 responses. The questionnaire was submitted to reliability, and validation analyses and to principal component analysis (PCA). Matrices of variance and covariance (MANOVA) were analysed, aiming to test differences in responses between groups. The results suggest that 'Resources' and the 'Territorial brand' are determining factors in the investment of new businesses or the development of existing ones. In addition, conditions that influence the entrepreneurial initiative include the match between the entrepreneur's objectives and the characteristics of the territory, particularly the link between this and the identity of the region.
Keywords	Geography. Anthropology. Recreation ; G
Subject code	910
Language	English
Publishing date	2022-07-01T00:00:00Z
Publisher	CEG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Interdisciplinaridade na Psicologia Ambiental na interrelação homem natureza

Ana Cristina Ferreira / Altem Nascimento Pontes

Research, Society and Development, Vol 9, Iss

2020 Volume 11

Abstract: Com o passar dos anos, a relação entre homem e o ambiente como seu habitat transformou-se. Diante da globalização e avanços tecnológicos, percebe-se o distanciamento do homem em relação à natureza. Esse trabalho buscou compreender as relações do homem e ... ...

Abstract	Com o passar dos anos, a relação entre homem e o ambiente como seu habitat transformou-se. Diante da globalização e avanços tecnológicos, percebe-se o distanciamento do homem em relação à natureza. Esse trabalho buscou compreender as relações do homem e o meio ambiente, no caso, o ambiente natural e projetado, através de revisão dos conceitos teóricos originários da Psicologia Ambiental e que a partir dela se desenvolveram, com o objetivo de captar o poder que o ambiente opera sobre o homem, a conexão com ele estabelecida, e os diferentes modos dos sujeitos agirem e reagirem de acordo com o ambiente em que vivem. Em termos metodológicos, a pesquisa foi qualitativa, básica, exploratória e bibliográfica, e ocorreu no período de maio a julho de 2020. Os resultados indicaram que a análise das relações homem-ambiente, por mais que revelem muito de seus comportamentos e morais, não basta para a compreensão de como eles se misturam ao mundo, de como vivenciam os fenômenos. Esse entendimento exige que se busque estudos e práticas interdisciplinares, preservando a ideia de que a natureza e o homem estão profundamente conectados e, por conseguinte, guardam uma relação de complementariedade, e os espaços devem possibilitar a interação, respeito e consciência dos cuidados e de práticas ecológicas.
Keywords	Psicologia Ambiental ; Meio Ambiente ; Sustentabilidade ; ; Special aspects of education ; LC8-6691 ; Science (General) ; Q1-390 ; Social Sciences ; H
Language	English
Publishing date	2020-11-01T00:00:00Z
Publisher	Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Methanation of CO 2 over Cobalt-Lanthanide Aerogels

Joaquim Badalo Branco / Ricardo Pinto da Silva / Ana Cristina Ferreira

Catalysts, Vol 10, Iss 704, p

Effect of Calcination Temperature

2020 Volume 704

Abstract: High surface area cobalt-lanthanide bimetallic aerogels were successfully synthesized by the epoxide addition method. The bimetallic aerogels were calcined at two different temperatures and either bimetallic oxides containing oxychlorides, Co 3 O 4 ... ...

Abstract	High surface area cobalt-lanthanide bimetallic aerogels were successfully synthesized by the epoxide addition method. The bimetallic aerogels were calcined at two different temperatures and either bimetallic oxides containing oxychlorides, Co 3 O 4 .3LnOCl (Ln = La, Sm, Gd, Dy and Yb) or perovskites, LnCoO 3 (Ln = La, Sm, Gd and Dy) were obtained at 500 or 900 °C, respectively. The exceptions are the aerogels of cerium and ytterbium, which after oxidation at 500 and 900 °C, stabilize as sesquioxides: Co 3 O 4 .3CeO 2 and 2Co 3 O 4 .3Yb 2 O 3 , the first at both temperatures and the second only at the highest temperature. The bimetallic cobalt-lanthanide oxychlorides or perovskites were tested as catalysts for the methanation of CO 2 . The cobalt catalytic activity is determined by the type and acid-base properties of the lanthanide oxide phase and by its pre-reduction under hydrogen. The best results were those obtained over the calcined aerogels pre-reduced under hydrogen. In particular, the highest values were those obtained over the Co-Ce aerogel calcined at 900 °C that in the same conditions present an activity comparable to that measured over a 5 wt.% Rh catalyst supported on alumina, one of the literature references. The activity and the selectivity increase with the catalysts’ basicity, showing an inverse dependence of the reduction temperature that decreases along the lanthanide series either for the aerogels calcined at 500 or 900 °C. In general, the basicity of the aerogels calcined at 900 °C (perovskites) is higher and they are more active but less selective than those calcined at 500 °C (oxychlorides), which to our knowledge is for the first time reported for the methanation of CO 2 .
Keywords	methane ; carbon dioxide ; cobalt-4f element aerogels ; bimetallic oxides ; Chemical technology ; TP1-1185 ; Chemistry ; QD1-999
Subject code	290
Language	English
Publishing date	2020-06-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Application of a cost-benefit model to evaluate the investment viability of the small-scale cogeneration systems in the Portuguese context

Ana Cristina Ferreira / Senhorinha Teixeira / José C.F. Teixeira / Silvia A. Nebra

International Journal of Sustainable Energy Planning and Management, Vol

2021 Volume 30

Abstract: Increasingly, modern society is dependent on energy to thrive. Remarkable attention is being drawn to high energy-efficient conversion systems such as cogeneration. World energy sustainability depends on the rational use of energy, fulfilling the demands ...

Abstract	Increasingly, modern society is dependent on energy to thrive. Remarkable attention is being drawn to high energy-efficient conversion systems such as cogeneration. World energy sustainability depends on the rational use of energy, fulfilling the demands without compromising the future of energy supply. The market trends foresee the use of decentralized production and the increasing replacement of conventional systems by small-scale cogeneration units as solutions to meet the energy needs of the building sector. Analysing the influence of the variables that determine the economic viability of decentralized energy production systems has become more important given the scenario of energy dependence and high energy costs for the final consumer. A cost-benefit model was developed and presented to identify the potential of small commercial scale cogeneration systems in the Portuguese building sector, based on cost-benefit analysis methodology. Five case-scenarios were analysed based on commercial models, using different technologies such as internal combustion engines, gas turbines and Stirling engines. A positive value of CBA analysis was obtained for all the tested cases, however, the use of classic economic evaluation criteria such as the net present value, internal rate of return and payback period results led to different investment decisions. The model also highlights the influence of energy prices in the economic viability of these energy power plants. The inclusion of subsidized tariffs for efficient energy production is the most contributing aspect in the analysis of the economic viability of small-scale cogeneration systems in the Portuguese building sector. Only in that case, it would be possible for an investor to recover the capital costs of such technology, even if the technical and societal benefits are accounted for.
Keywords	Engineering (General). Civil engineering (General) ; TA1-2040 ; Social sciences (General) ; H1-99
Subject code	690
Language	English
Publishing date	2021-02-01T00:00:00Z
Publisher	Aalborg University Press
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Complex Phenotype of Hypercholesterolemia in a Family with Both ABCG8 and APOB Mutations

Ana Cristina Ferreira / Ana Catarina Alves / Ana Margarida Medeiros / Gonçalo Padeira / Mafalda Bourbon

Portuguese Journal of Pediatrics , Vol 52, Iss

2021 Volume 4

Abstract: Familial Hypercholesterolemia (FH) is a common genetic hypercholesterolemia caused by mutations in LDLR, APOB and PCSK9 that leads to premature atherosclerosis. Other rare disorders like sitosterolemia can present the same phenotype but have distinct ... ...

Abstract	Familial Hypercholesterolemia (FH) is a common genetic hypercholesterolemia caused by mutations in LDLR, APOB and PCSK9 that leads to premature atherosclerosis. Other rare disorders like sitosterolemia can present the same phenotype but have distinct therapeutic interventions. We present a case of severe hypercholesterolemia in a 5-year-old child found to have both FH and sitosterolemia. The proband was diagnosed initially as FH, but the lack of pathogenic variants with Sanger approach questioned this hypothesis. High levels of sitosterol established the diagnosis of sitosterolemia, genetically confirmed by an ABCG8 homozygous variant c.1974C>G/p.(Tyr658*). NGS re-sequence for FH genes revealed an APOB heterozygous functional variant (c.11477C>T/p.(Thr3826Met), in a region previously unstudied. The mother presented the same genotype. Control of LDL-C levels was only accomplished with dietary and therapeutic intervention for both sitosterolemia and FH. The correct diagnosis of dyslipidemia is important to establish proper dietary and pharmacological intervention for atherosclerosis prevention.
Keywords	Pediatrics ; RJ1-570 ; Medicine (General) ; R5-920
Subject code	610
Language	English
Publishing date	2021-11-01T00:00:00Z
Publisher	Sociedade Portuguesa de Pediatria
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Prototype of Wearable Technology Applied to the Monitoring of the Vertebral Column

Ana Cristina Ferreira Geraldo / Angela Maria Kuasne / Heloyse Uliam Kurikic / Roderval Marcelino

International Journal of Online and Biomedical Engineering, Vol 16, Iss 01, Pp 34-

2020 Volume 50

Abstract: O principal objetivo desta pesquisa é o desenvolvimento de um modelo de tecnologia que permita o monitoramento da coluna vertebral, registrando movimentos nos pacientes afetados pelo tratamento auxiliar da lombalgia. Assim, um modelo de tecnologia ... ...

Abstract	O principal objetivo desta pesquisa é o desenvolvimento de um modelo de tecnologia que permita o monitoramento da coluna vertebral, registrando movimentos nos pacientes afetados pelo tratamento auxiliar da lombalgia. Assim, um modelo de tecnologia vestível com sensores que monitoram os movimentos da coluna vertebral e registra os dados no aplicativo para smartphone foi desenvolvido nesta pesquisa para uso posterior por profissionais de saúde. O protótipo foi avaliado por meio de uma amostra de 33 voluntários, observando uma funcionalidade do produto, uma avaliação clínica da coluna vertebral, uma identificação de hábitos comportamentais na caracterização da amostra. A viabilidade das tecnologias embarcadas computacionais em produtos de vestuário é evidenciada por esta pesquisa como um campo de estudo em uso, facilitando a coleta de dados do usuário no dia a dia.
Keywords	computational technology ; textile technology ; health ; vertebral column ; Computer applications to medicine. Medical informatics ; R858-859.7
Language	English
Publishing date	2020-01-01T00:00:00Z
Publisher	International Association of Online Engineering (IAOE)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Padrões de casamento dos imigrantes brasileiros residentes em Portugal Patrones de matrimonio de los inmigrantes brasileños residentes en Portugal Marriage patterns of Brazilian immigrants living in Portugal

Ana Cristina Ferreira / Madalena Ramos

Revista Brasileira de Estudos de População, Vol 29, Iss 2, Pp 361-

2012 Volume 387

Abstract: Ao longo das últimas décadas, o número de estrangeiros residentes em Portugal aumentou de forma expressiva. Neste contexto, a comunidade brasileira assumiu uma importância cada vez maior, sendo em 2009 a nacionalidade mais representada, com uma ... ...

Abstract	Ao longo das últimas décadas, o número de estrangeiros residentes em Portugal aumentou de forma expressiva. Neste contexto, a comunidade brasileira assumiu uma importância cada vez maior, sendo em 2009 a nacionalidade mais representada, com uma participação de 25% no total de residentes estrangeiros em Portugal. Esta evolução tem, como seria de se esperar, reflexos a outros níveis, em particular no contexto do casamento. Contrariando a tendência decrescente observada para o total de casamentos ocorridos entre 2001 e 2009, aqueles em que pelo menos um dos cônjuges nasceu no Brasil quase quadruplicaram nesse período. Para muitos autores, os casamentos mistos são um bom indicador da integração das comunidades imigrantes na sociedade de acolhimento. Assim, dada a importância da comunidade brasileira residente em Portugal, é relevante observar qual o peso dos casamentos mistos nesta comunidade e analisar seus padrões de matrimônio. A análise estatística dos microdados dos casamentos disponibilizados pelo Instituto Nacional de Estatística possibilitou estudar e caraterizar a evolução dos casamentos registrados em Portugal, entre 2001 e 2009, envolvendo brasileiros residentes em Portugal. Ficou patente a existência de um elevado nível de casamentos mistos, em especial com portugueses, neste período, o que indicia sua integração na comunidade de acolhimento. Verificaram-se igualmente algumas diferenças nos padrões de matrimônio entre os sexos, bem como uma tendência para a diminuição da importância dos casamentos mistos, em especial entre os homens. A lo largo de las últimas décadas, el número de extranjeros residentes en Portugal aumentó de forma expresiva. En este contexto, la comunidad brasileña asumió una importancia cada vez mayor, siendo en 2009 la nacionalidad más representativa, con una cuota de residentes del 25% en el total de población extranjera en Portugal. Esta evolución tiene, como cabría esperar, reflejos en otros niveles, en particular en el contexto del matrimonio. Contrariando la tendencia decreciente, observada para el total de matrimonios producidos entre 2001 y 2009, aquellos en que por lo menos uno de los cónyuges nació en Brasil casi se cuadruplicaron en ese período. Para muchos autores, los matrimonios mixtos son un buen indicador de la integración de las comunidades inmigrantes en la sociedad de acogida. Así pues, dada la importancia de la comunidad brasileña residente en Portugal, es relevante observar cuál es el peso de los matrimonios mixtos en esta comunidad y analizar sus patrones de matrimonio. El análisis estadístico de los microdatos de los matrimonios, puestos a nuestra disposición por el Instituto Nacional de Estadística, posibilitó estudiar y caracterizar la evolución de los matrimonios registrados en Portugal, entre 2001 y 2009, involucrando a brasileños residentes en Portugal. Quedó patente la existencia de un elevado nivel de matrimonios mixtos, en especial con portugueses, durante este período, lo que indicia su integración en la comunidad de acogida. Se verificaron igualmente algunas diferencias en los patrones de matrimonio entre los sexos, así como una tendencia a la disminución de la importancia de los matrimonios mixtos, en especial entre los hombres. Over the past decades, the number of foreign residents in Portugal has increased significantly. In this context, the Brazilian community is of increasing importance, and was, in 2009, the most represented nationality, with a 25% share in the total of foreign residents in Portugal. As expected, this development reflects on other levels, particularly in the context of marriage. Contrary to the downward trend observed for total marriages occurring between 2001 and 2009, those in which at least one spouse was born in Brazil almost quadrupled during the period. For many authors, mixed marriages are a good indicator of immigrant community integration in the host society. Thus, given the prominence of the Brazilian community in Portugal, it is important to observe the relevance of mixed marriages in this community and to analyze marriage patterns. Statistical analysis of microdata from weddings provided by the National Statistics Institute led us to study and characterize the possible evolution of marriages registered in Portugal between 2001 and 2009 and involving Brazilians living in Portugal. During this period there was a high number of mixed marriages, especially with Portuguese nationals, suggesting an integration with the host community. There were also some differences in the patterns of marriage between the sexes, as well as a tendency to a decreasing importance of mixed marriages, especially among men.
Keywords	Matrimonios mixtos ; Exogamia ; Familias transnacionales ; Inmigración brasileña ; Patrones de matrimonios ; Casamentos mistos ; Famílias transnacionais ; Imigração brasileira ; Padrões de casamento ; Mixed marriages ; Exogamy ; Transnational families ; Brazilian immigration ; Marriage patterns ; Economic theory. Demography ; HB1-3840 ; Social Sciences ; H ; DOAJ:Economics ; DOAJ:Business and Economics
Language	Portuguese
Publishing date	2012-12-01T00:00:00Z
Publisher	Associação Brasileira de Estudos Populacionais
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Padrões de casamento dos imigrantes brasileiros residentes em Portugal

Ana Cristina Ferreira / Madalena Ramos

Revista Brasileira de Estudos de População, Vol 29, Iss 2, Pp 361-

2012 Volume 387

Abstract	Ao longo das últimas décadas, o número de estrangeiros residentes em Portugal aumentou de forma expressiva. Neste contexto, a comunidade brasileira assumiu uma importância cada vez maior, sendo em 2009 a nacionalidade mais representada, com uma participação de 25% no total de residentes estrangeiros em Portugal. Esta evolução tem, como seria de se esperar, reflexos a outros níveis, em particular no contexto do casamento. Contrariando a tendência decrescente observada para o total de casamentos ocorridos entre 2001 e 2009, aqueles em que pelo menos um dos cônjuges nasceu no Brasil quase quadruplicaram nesse período. Para muitos autores, os casamentos mistos são um bom indicador da integração das comunidades imigrantes na sociedade de acolhimento. Assim, dada a importância da comunidade brasileira residente em Portugal, é relevante observar qual o peso dos casamentos mistos nesta comunidade e analisar seus padrões de matrimônio. A análise estatística dos microdados dos casamentos disponibilizados pelo Instituto Nacional de Estatística possibilitou estudar e caraterizar a evolução dos casamentos registrados em Portugal, entre 2001 e 2009, envolvendo brasileiros residentes em Portugal. Ficou patente a existência de um elevado nível de casamentos mistos, em especial com portugueses, neste período, o que indicia sua integração na comunidade de acolhimento. Verificaram-se igualmente algumas diferenças nos padrões de matrimônio entre os sexos, bem como uma tendência para a diminuição da importância dos casamentos mistos, em especial entre os homens.
Keywords	Matrimonios mixtos ; Exogamia ; Familias transnacionales ; Inmigración brasileña ; Patrones de matrimonios ; Economic theory. Demography ; HB1-3840 ; Social Sciences ; H
Language	Portuguese
Publishing date	2012-12-01T00:00:00Z
Publisher	Associação Brasileira de Estudos Populacionais
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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