Emergy signature for human services in Portuguese traded resources

Detalhes bibliográficos
Autor(a) principal: Martins, Cecília Maria Alves Torres
Data de Publicação: 2015
Outros Autores: Oliveira, Carlos Alberto Rego de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/11067/1379
Resumo: International journal of engineering and industrial management . - ISSN 1647-578X. - N. 5 (2013). - p. 115-137.
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spelling Emergy signature for human services in Portuguese traded resourcesPortugal - Condições económicas - Modelos matemáticosInternational journal of engineering and industrial management . - ISSN 1647-578X. - N. 5 (2013). - p. 115-137.The main objective of this paper is to present the Emergy Synthesis Methodology, as a different approach, to measure and evaluate the significance of human services flows (imported and exported) in Portuguese Economic System, in the years from 2000 to 2009, and comparing it with the magnitude of traded flows of energy and materials. Emergy (from embodied energy) is a concept from ecological engineering and economy and is a special measure of the previous work done to make something (a good or a service), whether the work was done by natural processes or by humans. All the main flows, either, goods or services, that cross the boundaries of a system are accounted and are converted to a single metric, the emergy measure in solar equivalent joules, seJ. To evaluate the emergy assigned to different kind of resource flows that support the Portuguese economic activities, the Emergy Synthesis Methodology of states and nations, presented in several studies was considered. Attention is given to emergy assigned to flows of imported resources and of exported resources. Concerning the emergy of human services in imported resources, which include imported services (including tourism) and services in imported goods, results show that they have the lowest contribution to the total imported emergy flow, accounting for 17.6% in 2000 and 17.0% in 2009. On contrary, as far as exported emergy flows are concerned, the largest contribution was from services, which includes exported services (including tourism) and services in exported goods, accounting for 67.6% and 60.8% of the total exported emergy flow, respectively in 2000 and 2009. Results show that, in the period, the amount of emergy exported in flows of human services was approximately 3.4 to 4.9 times greater than the amount that it was imported. As emergy measure the amount of resources required to drive a process and make products, it is a “donor side value” and hence, from emergy perspective, Portugal presented a deficit in human services trade. This means that more Portuguese resources, associated to human services, were delivered to the exterior than those that were received from outside.2015-01-20T15:32:12Z2015-01-202015-01-20T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/11067/1379http://hdl.handle.net/11067/1379eng1647-578XMartins, Cecília Maria Alves TorresOliveira, Carlos Alberto Rego deinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-04T01:46:58Zoai:repositorio.ulusiada.pt:11067/1379Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:26:28.183119Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Emergy signature for human services in Portuguese traded resources
title Emergy signature for human services in Portuguese traded resources
spellingShingle Emergy signature for human services in Portuguese traded resources
Martins, Cecília Maria Alves Torres
Portugal - Condições económicas - Modelos matemáticos
title_short Emergy signature for human services in Portuguese traded resources
title_full Emergy signature for human services in Portuguese traded resources
title_fullStr Emergy signature for human services in Portuguese traded resources
title_full_unstemmed Emergy signature for human services in Portuguese traded resources
title_sort Emergy signature for human services in Portuguese traded resources
author Martins, Cecília Maria Alves Torres
author_facet Martins, Cecília Maria Alves Torres
Oliveira, Carlos Alberto Rego de
author_role author
author2 Oliveira, Carlos Alberto Rego de
author2_role author
dc.contributor.author.fl_str_mv Martins, Cecília Maria Alves Torres
Oliveira, Carlos Alberto Rego de
dc.subject.por.fl_str_mv Portugal - Condições económicas - Modelos matemáticos
topic Portugal - Condições económicas - Modelos matemáticos
description International journal of engineering and industrial management . - ISSN 1647-578X. - N. 5 (2013). - p. 115-137.
publishDate 2015
dc.date.none.fl_str_mv 2015-01-20T15:32:12Z
2015-01-20
2015-01-20T00:00:00Z
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dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/11067/1379
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dc.relation.none.fl_str_mv 1647-578X
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