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Sample records for bronze marcos da

  1. Os marcos teóricos da arqueologia histórica, suas possibilidades e limites

    OpenAIRE

    Lima,Tania Andrade

    2002-01-01

    Este artigo apresenta os marcos teóricos que regem a Arqueologia Histórica nas Américas à luz das principais vertentes do pensamento arqueológico, particular­mente nas quatro últimas décadas, que ora colocam a disciplina no campo da Antropo­logia, ora no campo da História. Discute suas possibilidades e limites, propõe uma perspectiva integradora e defende a arqueologia do capitalismo como o foco adequado da disciplina. This paper presents the theoretical frameworks that direct Historical A...

  2. Neutralidade de Rede: O caso Comcast v. Netflix e o Marco Civil da Internet

    Directory of Open Access Journals (Sweden)

    Maria Eduarda Cintra

    2015-05-01

    Full Text Available Propósito – O artigo pretende fazer uma reflexão sobre como o Estado brasileiro avançou quanto à defesa do princípio da neutralidade de rede. Para essa análise, será utilizado o caso Comcast vs. Netflix como exemplo para comparar as ações do Estados Unidos e do Brasil sobre o tema. Metodologia/abordagem/design – O texto segue o método de abordagem de análise de problema para poder tirar conclusões sobre as práticas adotadas pelos Estados Unidos e pelo Brasil. Resultados – Foi constatado que o Brasil está na vanguarda sobre governança da internet, especialmente por zelar pela neutralidade de rede. Implicações práticas – O artigo serve para compreensão da discussão sobre neutralidade de rede e, especialmente, sobre o processo do Marco Civil da Internet no Brasil. Originalidade/relevância do texto – O artigo, ao fornecer uma perspectiva comparada entre o Estado americano e brasileiro, mostra como esse bem público, qual seja o da internet neutra e aberta, tem sido preservado.

  3. Marco Civil da Internet: uma lei sem conteúdo normativo

    Directory of Open Access Journals (Sweden)

    Eduardo Tomasevicius Filho

    2016-04-01

    Full Text Available A Lei n.12.965, de 23 de abril de 2014, promulgou o denominado Marco Civil da Internet, com o intuito de estabelecer princípios, garantias, direitos e deveres para os usuários de internet no Brasil. Embora se tenha comemorado sua aprovação, por supostamente as demais normas jurídicas vigentes no Brasil - como a Constituição Federal, o Código Civil e o Código Penal - não terem aplicação nas relações sociais entabuladas pela internet, essa lei apresenta poucas inovações e muitas insuficiências e deficiências de cunho jurídico. Somando-se a esse fato a impossibilidade jurídica de regulação de uma rede mundial de computadores por meio de lei de um único país, os problemas gerados pela internet continuarão a afetar a privacidade, honra e imagem das pessoas, ao mesmo tempo em que conquistas, como a da neutralidade da rede, terão pouco impacto na vida das pessoas.

  4. Marco Civil da Internet: Analysis of Judicial Decisions That Suspend the Whatsapp Application in Brazil– 2015-16

    Directory of Open Access Journals (Sweden)

    Irineu Francisco Barreto Junior

    2016-12-01

    Full Text Available This paper analyzes the judicial decisions that suspended the operation of the Whatsapp application in Brazil, between 2015 and 2016. The Marco Civil da Internet and bring widely known principles to the digital segment, introduces a new principle aimed at something extremely sensitive within the network computers, registration and storage of the content of applications and network providers. The issues addressed in this study addresses the legal basis of court rulings that suspended the application and the methodology used in the research was a critical review of the applicable law and doctrine until then formulated on the Brazil web legislation.

  5. Marco Polo.

    Science.gov (United States)

    Rinetti, Carolyn

    This two day lesson plan for middle school students examines Marco Polo's travels and trade during the Middle Ages. The unit consists of four activities: (1) journal entry/brainstorming; (2) lecture on trade items of the Middle Ages and Marco Polo; (3) simulation of Marco Polo's Journey; and (4) a writing assignment. It provides step-by-step…

  6. Marcos legais da propaganda de medicamentos: avanços e retrocessos Legal frameworks of drug advertisement: progress and setbacks

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    Carolina Pires Araújo

    2012-01-01

    Full Text Available Desde o início da civilização brasileira, já existe divulgação de produtos farmacêuticos, sendo os medicamentos os preferidos dos anúncios. A propaganda de medicamentos, enquanto estratégia persuasiva, pode representar risco sanitário, caso não se comprometa com a divulgação de informação correta e segura. Nesse sentido, várias são as tentativas de controle sanitário por parte do Estado, as quais parecem consolidar-se em embates de domínio ético e legal. Em busca de compreender o contexto que norteia a atual conjuntura da problemática sobre propaganda de medicamentos, o presente estudo traça um percurso histórico, a partir dos principais marcos legais: a Junta Central de Higiene (1851, a Lei de Vigilância Sanitária (1976 e a criação da ANVISA (1999. Identificou-se que os marcos acompanham o contexto estrutural do país, contribuindo para a consolidação do campo da regulação hoje.Since the beginning of Brazilian civilization, there is already disclosure of pharmaceutical drugs being the favorite of the ads. The advertising of medicines, while persuasive strategy, may represent health risk, if not compromised with the release of accurate and safe information. For that reason, there are several attempts at sanitary control by the state, which appears to be consolidated in the struggles of the ethical and legal domain. In seeking to understand the context that guides, the current situation of the drug advertising problem, this study provides a historical background, from the main legal frameworks: "Junta Central de Higiene" (1851, "Lei de Vigilância Sanitária" (1976 and the creation of "ANVISA" (1999. It was identified that milestone follows the country structural context, contributing to the consolidation of the regulation's field nowadays.

  7. PROPOSTA DE ASSOCIAÇÃO DE MARCO CONCEITUAL DE ROY COM A TEORIA DA CRISE

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    Margarita Villar Luis

    Full Text Available Trata-se de um relato sobre os fundamentos da teoria da Crise, propondo sua articulação com o modelo conceituai de Callista ROY12. Com objetivo de proporcionar ao enfermeiro um corpo de conhecimentos teórico e instrumental, para assistência a pessoas em crise. Dentro dessa proposta sugere-se ainda, um roteiro de assistência de enfermagem derivado de ambas teorias exemplificado pela autora, através de aplicação prática.

  8. Desafios do Planejamento Urbano no Brasil e seus Marcos Legais sob a Ótica da Agricultura Urbana

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    Natália da Silva Lemos

    2015-08-01

    Full Text Available Diante de um futuro incerto de mudanças climáticas, prevê-se um colapso em grandes cidades do mundo. O cenário é produto da insegurança alimentar gerada pelo distanciamento da agricultura local das áreas adjacentes ao espaço urbano, contexto já identificado em algumas civilizações no passado. Sob a perspectiva, assume-se que ações de planejamento urbano devem estar integradas a estratégias de produção de alimentos a incluir iniciativas em favor da agricultura urbana e periurbana, e de práticas da permacultura. A considerar tais premissas, o objetivo da pesquisa é demonstrar os desafios do planejamento urbano no Brasil quando analisado sob a ótica da agricultura urbana. Entende-se a necessidade de assumir novos conceitos e modelos de composição do espaço, associados à permacultura e sua prática experimental, considerando a integração dos contextos urbanos (zonas intraurbanas, periurbanas e rurais que atualmente não apresentam claras inter-relações. Para aproximar o estudo à realidade brasileira foram analisadas, conjuntamente, as políticas sociais do Ministério do Desenvolvimento Social e os marcos legais das políticas urbanas, a incluir o Estatuto da Cidade (Lei 10.257/2001 e a Lei 6.766/1979. Os resultados apontam que há uma lacuna quanto às ações e práticas de agricultura urbana no âmbito legal de uso e ocupação do solo e, portanto, sugerem-se algumas diretrizes de aplicação. The climate change process is providing an uncertain future, supporting the forecast of big cities collapse. The scenery is product of the food insecurity issue generated by the distance between the local farmers and the urban surrounding areas, a situation already reported in civilizations in the past. Considering this perspective, it is assumed that urban planning actions must be integrated to food production strategies such as urban and peri-urban agriculture and permaculture practices. Based on these premises, this paper aims

  9. Viabilidade econômica da produção de eucalipto no polo moveleiro de Marco - Ceará =Economic viability of eucalyptus production in the industrial furniture district of Marco – Ceará

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    Fuad Pereira Nogueira Filho

    2017-10-01

    Full Text Available A viabilidade econômica de projetos florestais é fortemente afetada pelo horizonte de tempo, os custos de produção, o preço da madeira, a produtividade do local e a taxa de desconto. Este trabalho analisou a viabilidade econômica da produção de madeira de eucalipto para o polo moveleiro de Marco-Ceará, em dois cenários: sem e com financiamento. Para a análise do projeto, utilizou-se o clone AEC 1528, considerando-se uma produtividade de 146,6, 376,4 e 316,1 m3 ha-1 aos 7, 14 e 21 anos, respectivamente, simulado pelo software SISEucalipto. A madeira, cortada e empilhada na propriedade, foi destinada às indústrias de móveis e de cerâmica da região, conforme o sortimento de madeira por classe de diâmetro. A partir do fluxo de caixa, que abrangeu as atividades do plantio à colheita, foram obtidos indicadores de rentabilidade e de risco. Realizou-se, também, uma análise de sensibilidade, em que se avaliou o comportamento do valor presente líquido em função da variação do investimento inicial, da taxa de juros, do custo da colheita e dos preços da madeira. Os indicadores econômicos no cenário sem financiamento indicaram que o projeto deve ser aceito, possuindo uma boa rentabilidade. Ao incorporar o financiamento no projeto, utilizando a linha de crédito do programa ABC Florestas, constatou-se um aumento de seus indicadores quando comparado com o cenário sem financiamento. A produção de eucalipto no polo moveleiro de Marco-CE, apresentou-se viável economicamente nos dois cenários avaliados. A análise de sensibilidade demonstrou que o projeto possui um baixo risco, apesar do longo horizonte de tempo. = The economic viability of forestry projects is strongly affected by the time horizon, production costs, timber prices, site productivity, and the discount rate. This paper analyzed the economic viability of eucalyptus production in the industrial furniture of Marco-CE in two scenarios: with funding and without funding

  10. NANOMEDICAMENTOS E OS DESAFIOS DA ANVISA DIANTE DA INEXISTÊNCIA DE UM MARCO REGULATÓRIO NO BRASIL

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    Liziane Paixão Silva Oliveira

    2016-08-01

    Full Text Available A nanotecnologia, em razão de suas propriedades singulares, pode proporcionar inúmeros benefícios em diversas áreas estratégicas: saúde, eletrônica, alimentação, agricultura, meio ambiente entre outras. Um dos ramos mais promissores é o desenvolvimento e comercialização de nanomedicamentos que prometem revolucionar o campo de aplicação da medicina. No Brasil, a Agência Nacional de Vigilância Sanitária (ANVISA, que tem suas atribuições definidas na Lei nº 9.782/1999, é o órgão responsável por fiscalizar a produção e a comercialização desses novos medicamentos. Nesse artigo, será dado enfoque aos desafios da ANVISA considerando a existência de nanomedicamentos no mercado de consumo que não são identificados ou reconhecidos como tais pela vigilância sanitária diante da inexistência de uma norma regulatória nacional.

  11. Bronze Age Acrobats

    DEFF Research Database (Denmark)

    Iversen, Rune

    2014-01-01

    A Danish eighteenth-century find of some bronze figurines tells the story of the practising of similar ritual performances across Bronze Age Europe from Egypt to Scandinavia. The Danish figurines, as well as Swedish rock carvings, show backwards-bending female acrobats doing backward handsprings...... of the immaterial, ritual and cosmological exchange that characterized the second and early firstmillennium BC.Beliefs and ritual practices went hand in hand with the adoption of a series of elite items and an aristocratic lifestyle, thereby creating a unique and fascinating European Bronze Age....

  12. A caracterização da lógica pela força assertórica em frege. Resposta a Marco Ruffino

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    Dirk Greimann

    2012-06-01

    Full Text Available Segundo a caracterização padrão da lógica nos escritos fregeanos, a palavra "verdadeiro" indica a essência da lógica, assim como a palavra "bom" indica a essência da ética e a palavra "belo" a essência da estética. Num escrito póstumo de 1915, porém, Frege afirma que é a força assertórica, e não a palavra "verdadeiro", que indica a essência da lógica. Prima facie, esta correção está em conflito com a crítica fregeana à concepção psicologista da lógica. Pois, segundo esta crítica, a lógica não é a ciência das leis "do ser tomado como verdadeiro", mas a ciência das leis "do ser verdadeiro", ao passo que a força assertórica expressa o ser tomado como verdadeiro. Em escritos anteriores, tentei resolver este conflito por uma reconstrução da concepção fregeana da verdade baseada na tese fregeana de que verdade é expressa na linguagem natural pela "forma da sentença assertórica". A meta do presente trabalho é defender esta interpretação contra as objeções recentemente feitas por Marco Ruffino.

  13. Bronze rainbow hologram mirrors

    Science.gov (United States)

    Dawson, P.

    2006-02-01

    This project draws on holographic embossing techniques, ancient artistic conventions of bronze mirror design and modelling and casting processes to accomplish portraiture of reflection. Laser scanning, 3D computer graphics and holographic imaging are employed to enable a permanent 3D static holographic image to appear integrated with the real-time moving reflection of a viewer's face in a polished bronze disc. The disc and the figure which holds it (caryatid) are cast in bronze from a lost wax model, a technique which has been used for millennia to make personal mirrors. The Caryatid form of bronze mirror which went through many permutations in ancient Egyptian, Greece and Rome shows a plethora of expressive figure poses ranging from sleek nudes to highly embellished multifigure arrangements. The prototype of this series was made for Australian choreographer Graeme Murphy, Artistic Director of the Sydney Dance Company. Each subsequent mirror will be unique in figure and holographic imagery as arranged between artist and subject. Conceptually this project references both the modern experience of viewing mirrors retrieved from ancient tombs, which due to deterioration of the surface no longer reflect, and the functioning of Chinese Magic mirrors, which have the ability to project a predetermined image. Inspired by the metaphorical potential of these mirrors, which do not reflect the immediate reality of the viewer, this bronze hologram mirror series enables each viewer to reflect upon himself or herself observing simultaneously the holographic image and their own partially obliterated reflection.

  14. MARCOS DE LIDERAZGO EN LAS EMPRESAS: BUCARAMANGA Y SU AREA METROPOLITANA // FRAMES OF LEADERSHIP INTO THE COMPANIES: THE CITY OF BUCARAMANGA (COLOMBIA AND ITS SOUROUNDED AREA // MARCOS DA LIDERANÇA EM EMPRESAS: O CASO DA CIDADE DE BUCARAMANG

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    Orlando Contreras

    2016-01-01

    Full Text Available El presente trabajo constituye un estudio exploratorio para la identificación de los estilos de liderazgo predominantes en los dirigentes de las empresas del Área Metropolitana de Bucaramanga (en adelante AMB. Para tal fin, se aplicó un instrumento de evaluación basado en el modelo de los cuatro marcos del liderazgo y el subsecuente análisis estadístico de los resultados. Considerando lo anterior, se encuentra que los gerentes tienden frecuentemente hacia prácticas como la definición de objetivos, procedimientos, normas claras, dirección a través del análisis y el diseño de planes ampliamente aceptados; y en menor medida hacia prácticas como el estímulo a la competencia interna, la resolución de conflictos y la conformación de una base de poder.

  15. Bronze amulet from Sidak

    OpenAIRE

    Smagulov Erbulat A.

    2014-01-01

    A bronze amulet in the shape of a horseman found on the citadel of the Sidak fortified settlement site in Turkestan district, Southern Kazakhstan oblast is described in the article. Similar findings are met on the vast Eurasian area ranging from Mongolia to the Urals. The published item may be referred to a series of similar finds from the handicraft centers located in the Syr Darya river basin, such as Khujand, Kanka, and, lately, Sidak. Handicraft centers of Sogdiana are traditionally regar...

  16. Etruscan and Italic bronze statuettes

    NARCIS (Netherlands)

    Galestin, Marianne Caroline

    1987-01-01

    In Central Italy, small bronze statuettes were made in thousands in antiquity and also the number which still remains is considerable. This amount is in shrill contrast to that of the life-size bronzes which amply decorated Etruscan cities, as the written sources tell us; very few of these larger

  17. Aspectos reprodutivos e dieta alimentar dos ninhegos de Rhinoptynx clamator (Aves: Strigidae no campus Marco Zero da Universidade Federal do Amapá, Macapá-AP Nesting and diet of Rhinoptynx clamator (Aves: Strigidae from Campus Marco Zero da Universidade Federal do Amapá, Macapá-AP

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    Kurazo Mateus Okada Aguiar

    2009-03-01

    Full Text Available Este trabalho tem como objetivo relatar os aspectos comportamentais de nidificação, alimentação e desenvolvimento dos ninhegos de Rhinoptynx clamator (Strigidae em um fragmento florestal no Campus Marco Zero da Universidade Federal do Amapá. Apenas um ninho foi encontrado, no solo e na base de um tucumã Astrocaryum oleatum. Três ovos brancos com manchas marrons foram observados, cuja medida foi de 41 x 35 mm em média. A incubação durou 28 dias e foi efetuada pela fêmea, e o último filhote a nascer viveu apenas dois dias. Os filhotes sobreviventes foram medidos durante o seu desenvolvimento. Durante a estação reprodutiva foram coletadas algumas pelotas de regurgitação, sendo encontrados três tipos de vertebrados: Rattus sp., Micoureus cf. regina e Columbina talpacoti.We report nesting behavior, feeding and development of nestling of Rhinoptynx clamator (Strigidae in a forest fragment on Campus Marco Zero of Universidade Federal do Amapá. The nest was located on the ground, close to a palm Astrocaryum oleatum and three eggs were observed. These eggs were white whit brown spots and measured 41 x 35 mm in average. Incubation was made by female and lasted 28 days and the last owlet died two days after born. The remaining birds were measured during its development. Feeding items includes Rattus sp., Micoureus cf. regina and Columbina talpacoti.

  18. Estudio de la caída libre desde marcos de referencia no inerciales usando herramientas computacionales

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    John Hernán Díaz Forero

    2014-05-01

    Full Text Available Se elaboró una propuesta para la enseñanza e implementación del modelo de Galileo (descripción del movimiento del punto material —partícula— en el espacio y en el tiempo en los cursos de física para ciencias e ingeniería, realizando una clase de física mediante la resolución de problemas no convencionales, específicamente la descripción de la caída libre desde sistemas de referencia no inerciales. En particular, se considera en el espacio bidimensional de coordenadas un observador inercial en el origen de coordenadas, que percibe un sistema de dos partículas con la propiedad masa m, con diferentes posiciones iníciales y velocidades iniciales, que están en presencia del campo gravitacional g , y se resuelve el problema desde sistemas de referencia no inerciales montados en las partículas 1 y 2. Se realizó una animación apoyados en el uso de nuevas tecnologías computacionales (el software Interactive Physics.

  19. Bronze railing from Mediana

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    Vasić Miloje R.

    2003-01-01

    Full Text Available The hoard containing components of bronze railing was discovered in trench 7 during excavations at Mediana in 2000. Railing consists of cancelli and herms with busts of deities between them. Railing was constructed in such a way that it was possible to disassemble and reassemble it. Three cancelli one fragmented semicancellus cast together with herm and herms, one with bust of Aesculapius and other with bust of Luna. It could be concluded that railing consisted of two segments with passage between them. Male deities were represented on the left segment of the railing and female deities on the right segment. Detailed analysis revealed that Aesculapius as well as Luna bear strong mark of classical Greek and Hellenistic art, which experienced some kind of renaissance in the time of Constantine I. It is very probable that we can recognize the portrait of Faustina, Constantine’s wife in the portrait of Luna. According to the historical events the railing could have been produced before 325 AD when Constantine definitively accepted Christianity at Council of Nicaea. It is difficult to say where the railing had been produced. It had been most probably brought to Mediana during the stay of emperor Julian in Niš in 361. The sculptures found in one room of the villa with peristyle had probably been brought at the same time. The apse of triclinium of this villa had most likely been arranged as small shrine with bronze railing at its entrance. The railing was buried in 378 after battle of Adrianople and invasion of Goths in diocese Dacia.

  20. Mummification in Bronze Age Britain

    OpenAIRE

    Booth, T. J.; Chamberlain, A.T.; Pearson, M.P.

    2015-01-01

    Intentional mummification is a practice usually associated with early Egyptian or Peruvian societies, but new evidence suggests that it may also have been widespread in prehistoric Britain, and possibly in Europe more generally. Following the discovery of mummified Bronze Age skeletons at the site of Cladh Hallan in the Western Isles of Scotland, a method of analysis has been developed that can consistently identify previously mummified skeletons. The results demonstrate that Bronze Age popul...

  1. Decorative layers on tin bronzes

    OpenAIRE

    Z. Konopka; M. Nadolski; A. Zyska; M. Łągiewka

    2010-01-01

    Decorative layers are decisive for aesthetic value of castings, therefore significant demands are raised towards such layers, e.g. pleasant durable colour, gloss, and smoothness. The work discusses the influence of the type of mechanical working applied to the surfaces of CuSn10 tin bronze castings on the quality and durability of a decorative coating. The scope of the work has included designing and manufacturing of cast samples of tin bronze, mechanical working of the surfaces in order to p...

  2. Bronze amulet from Sidak

    Directory of Open Access Journals (Sweden)

    Smagulov Erbulat A.

    2014-03-01

    Full Text Available A bronze amulet in the shape of a horseman found on the citadel of the Sidak fortified settlement site in Turkestan district, Southern Kazakhstan oblast is described in the article. Similar findings are met on the vast Eurasian area ranging from Mongolia to the Urals. The published item may be referred to a series of similar finds from the handicraft centers located in the Syr Darya river basin, such as Khujand, Kanka, and, lately, Sidak. Handicraft centers of Sogdiana are traditionally regarded as places of their manufacture. However, no finds of the kind are mentioned at proper Sogdian towns (Penjikent, Paikend, Afrasyab, etc., which have been thoroughly studied. Hence, the author makes a conclusion that these amulets, as well as many other pieces of jewelry were manufactured in the 7th to 8th centuries AD at the handicraft centers of Chach, a state formation comprising the Middle Syr-Darya River oases at the time. This region was inhabited by the descendants of the ancient Kangju state inhabitants, who inherited cultural traditions of the past, including the myths about the hero-horseman.

  3. Desenvolvimento da Vigilância Epidemiológica de Fronteira no contexto da Globalização: conceitos e marcos teóricos.

    Directory of Open Access Journals (Sweden)

    Robson BRUNIERA-OLIVEIRA

    2014-12-01

    Full Text Available Objetivo. Apresentar e analisar as ações desenvolvidas para a implementação e desenvolvimento de Vigilância Epidemiológica de Fronteiras, nos Blocos Econômicos Multinacionais, particularmente na América do Sul e Brasil. Metodologia. Foi realizado um estudo de revisão narrativa incluindo artigos científicos, documentos técnicos, diretrizes, normas, manuais, pautas de reuniões ou qualquer outro documento que fosse relacionado ao desenvolvimento e implementação de ações e programas de Vigilância Epidemiológica em Fronteiras. O estudo foi baseado nos sites das instituições/organizações multinacionais e nas bases MedLine, PubMed, Scielo e Scopus. Resultados. Foram identificados a criação de órgãos e ações no intuito de implementar e desenvolver a vigilância epidemiológica de fronteiras para os seguintes blocos: União Europeia (Health Security Committee, European Center for Disease Prevention and Control, Sistema de alerta rápido e resposta, General Rapid Alert System e Rede de Monitoramento Ad Hoc; Tratado Norte-Americano de Livre Comércio (Border Infectious Disease Surveillance, “Projeto de Vigilância e Alerta Rápido de Doenças Infeciosas” ; Mercado Comum do Sul ( Reunião de Ministros da Saúde do Mercosul, Subgrupo de Trabalho 11 Saúde e Subcomissão Controle Sanitário de Portos, Aeroportos, Terminais e Passos Fronteiriços Terrestres; e União de Nações Sul-Americanas. Conclusões. Os programas e politicas desenvolvidos até o momento refletem o reconhecimento da importância do assunto por parte dos Estados Membros da OMS. Uma maior integração, com troca de informações, incluindo fluxos, frameworks, planos de preparação e o fortalecimento de áreas estratégicas como de energia e transporte deve ser incentivada intra e inter blocos.

  4. Notas feministas sobre o marco jurídico da migração e do tráfico de mulheres na Europa e Espanha

    Directory of Open Access Journals (Sweden)

    Claudia Mayorga

    2012-07-01

    Full Text Available http://dx.doi.org/10.5007/1807-1384.2012v9n1p278   Neste trabalho, buscamos compreender aspectos do marco jurídico da migração, tráfico de mulheres e prostituição na Europa de forma geral e na Espanha de forma específica a partir de uma análise das principais regulamentações vigentes entre 2005/2007 nesses contextos. Para isso, buscamos conhecer como a legislação e a tendência ao fechamento de fronteiras oferecem brechas que levam a situações de exploração e vulnerabilização para mulheres migrantes que estão na Espanha exercendo a prostituição. Foram analisados os seguintes documentos: Protocolo para prevenir, reprimir e sancionar o tráfico de pessoas, especialmente mulheres e crianças, do ano 2000, que complementa a Convenção das Nações Unidas contra a delinqüência organizada internacional; Protocolo contra o tráfico ilícito de migrantes por terra, mar e ar, que complementa a Convenção das Nações Unidas contra a delinqüência organizada internacional e a Lei de Migração espanhola de 1985. A política sobre o tráfico de mulheres e as posições mais conservadoras sobre a migração na União Européia tem tido conseqüências específicas para as mulheres. Os tratados e leis enfatizam, sobremaneira, as medidas de controle de fronteiras e repressão aos Possíveis delitos cometidos. Tal perspectiva deixa em segundo plano os direitos dos/as migrantes e das pessoas vitimas do tráfico (é importante ressaltar que os textos dos tratados e leis dão margem para que se identifique tráfico de mulheres com migração para a prostituição. Com relação à prostituição, o direito espanhol não penaliza, mas também não regulamenta, o exercício da prostituição; deixa tal atividade em uma situação de completa alegalidade, o que acaba por incrementar a vulnerabilização das prostitutas frente abusos e explorações de todos os tipos.

  5. Disputa política, neutralidade de rede e direitos dos usuários: A cobertura sobre a votação do Marco Civil da Internet

    Directory of Open Access Journals (Sweden)

    Camila Mont'Alverne

    2017-01-01

    Full Text Available O objetivo do trabalho é entender como os jornais O Estado de S. Paulo e Folha de S. Paulo retrataram, em seus editoriais, a controvérsia cercando a votação do Marco Civil da Internet na Câmara dos Deputados. A ideia é compreender, não somente, como os periódicos viam o projeto de lei, mas também como se posicionavam na discussão, que ia além do Marco Civil e envolvia disputas entre governo e base aliada. O artigo tem, por método, análise de conteúdo aliada à identificação dos enquadramentos – a partir do conceito de Robert Entman – presentes nos textos. Foram identificados 7 enquadramentos no material: divergências entre o governo e a base aliada; defesa da neutralidade de rede; articulação dos oponentes à aprovação do Marco Civil; brechas no projeto; mobilização em favor da aprovação; questionamento sobre a qualidade do serviço prestado pelas teles; e crítica à exigência de data centers instalados no Brasil. A fim de examinar o conteúdo dos textos, os frames foram analisados qualitativamente. Foram observadas, ainda, as personagens e instituições citadas pelos editoriais. Os resultados apontam para a priorização do conflito entre a Presidência e a base aliada na cobertura. Também são abordadas questões de cunho substancial, como brechas no projeto e a defesa da neutralidade de rede. Os jornais adotam uma posição ambígua em relação ao Marco Civil. Ao mesmo tempo em que apoiam o projeto, destacam problemas e interesses diversos que comprometem a lei, além das brechas que ela poderia ter. No caso dos editoriais sobre o Marco Civil, os periódicos não somente oferecem uma interpretação ao leitor, mas procuram apresentar-se como guardiões da audiência, enquanto defendem seus próprios interesses. This study aims to understand how two newspapers, O Estado de S. Paulo and Folha de S. Paulo, portrayed in their editorials the controversy surrounding the vote in the Brazilian Chamber of Deputies on

  6. Gestire il denaro, gestire la salvezza. Tre immagini a sostegno del Monte di Pietà: Marco da Montegallo, Lorenzo d’Alessandro e Vittore Crivelli / Managing money, managing salvation. Three images in support of the Mont of Piety: Marco da Montegallo, Lorenzo d’Alessandro and Vittore Crivelli

    Directory of Open Access Journals (Sweden)

    Giuseppe Capriotti

    2011-12-01

    Full Text Available I francescani dell’Osservanza, attraverso le prediche sulla mercatura, sull’usura e sulla carità, promuovono un tipo d’economia, strettamente connessa al mercato e all’affidabilità imprenditoriale del mercante, il quale deve essere in grado di far circolare fruttuosamente il denaro e poi di investire parte dei suoi introiti in opere caritatevoli o di pubblica utilità, in funzione della sua salvezza. Non di rado tali investimenti si concretizzano nella commissione di immagini, spesso esposte proprio in chiese francescane, o nel sostentamento del Monte di Pietà, un’istituzione bancaria, inventata e difesa dagli osservanti, che, spesso in rivalità col banco ebraico, prestava denaro su pegno. La promozione e la legittimazione di questo istituto, che sin dalla sua nascita genera numerose dispute, anche interne allo stesso ordine francescano, soprattutto per quel che riguarda la liceità o meno dell’interesse, è affidata non solo alle prediche, ma anche alle opere d’arte. Nella Marca appenninica di fine Quattrocento sono state prodotte a tale scopo almeno tre immagini. Simili nel contenuto e nella tipologia, la Figura della vita eterna, ideata dal predicatore osservante Marco da Montegallo, la Madonna del Monte di Caldarola, dipinta dal sanseverinate Lorenzo d’Alessandro, e l’omologa Madonna del Monte di Massa Fermana, realizzata da Vittore Crivelli, si illuminano e si chiariscono a vicenda. The Franciscans of the Osservanza order, through their sermons on commerce, usuryand charity, promote a type of economy, that is closely related to the business market andto the reliability of the merchant, who must be able to make money circulate fruitfully and then to invest part of his benefits on good deeds or public works, to have salvation.These investments are often used in the commission of images, often exposed in Franciscan churches, or in support of the Mont of Piety, a bank, developed and defended by the Osservanti, that, often

  7. 33 CFR 110.74 - Marco Island, Marco River, Fla.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Marco Island, Marco River, Fla. 110.74 Section 110.74 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY ANCHORAGES ANCHORAGE REGULATIONS Special Anchorage Areas § 110.74 Marco Island, Marco River, Fla. Beginning...

  8. As mutações da escola média na Argentina no marco da reconfiguração de um mundo globalizado The changes in Argentinian high school at the landmark of reorganizing a globalized world

    Directory of Open Access Journals (Sweden)

    Guillermina Tiramonti

    2008-12-01

    Full Text Available Neste texto, a autora analisa a reconfiguração dos sistemas educacionais e os processos que os atravessam no marco das transformações sociais e culturais dos últimos anos. Introduz a idéia de fragmentação do sistema, estabelecendo diferenças entre este novo conceito e o tradicional conceito de segmentação educacional, ao mesmo tempo que fundamenta teoricamente essa conceitualização. Aborda, além disso, as mudanças na trama institucional, geradas pela modernidade (família, Estado, escola e seu impacto na constituição das subjetividades, por meio da caracterização das assincronias na individualização de alunos pertencentes a diferentes setores socioculturais. Por fim, identifica os mandatos que, requeridos pelo presente, recaem sobre a escola em termos de inclusão, contenção e atenção.In this text, the author analyzes the reorganization of educational systems and the processes that have affected it along the important social and cultural changes of the latest years. She also introduces the idea of a fragmentation of the educational system, establishing differences between this new concept and the traditional concept of educational breakup, and explaining this conceptualization with theoretical bases. She also approaches the changes in institutional structures, generated by modernity (family, the State and schools as well as their impact on the constitution of subjectivities through the characterization of asynchrony in the individualization of students from different socio-cultural backgrounds. The author finally identifies prescriptions which are present-time demands and must be faced by schools in terms of inclusion, restraint and fulfillment.

  9. Decorative layers on tin bronzes

    Directory of Open Access Journals (Sweden)

    Z. Konopka

    2010-10-01

    Full Text Available Decorative layers are decisive for aesthetic value of castings, therefore significant demands are raised towards such layers, e.g. pleasant durable colour, gloss, and smoothness. The work discusses the influence of the type of mechanical working applied to the surfaces of CuSn10 tin bronze castings on the quality and durability of a decorative coating. The scope of the work has included designing and manufacturing of cast samples of tin bronze, mechanical working of the surfaces in order to prepare them for applying coating layers,generating decorative layers as a result of chemical reactions, and the quality assessment and comparison of the obtained coating. Theassessment of thickness and continuity of the obtained decorative layers based on metallographic examinations has been presented.

  10. A bronze amulet from Sidak

    OpenAIRE

    Smagulov Erbulat A.

    2014-01-01

    A bronze amulet in the shape of a horseman found on the citadel of the Sidak fortified settlement site in Turkestan district, Southern Kazakhstan oblast is described in the article. Similar findings are met on the vast Eurasian area ranging from Mongolia to the Urals. The published item may be referred to a series of similar finds from the handicraft centers located in the Syr Darya river basin, such as Khujand, Kanka, and, lately, Sidak. Handicraft centers of Sogdiana are traditionally regar...

  11. Marcos regulatórios na educação superior: a gestão da Universidade da Região da Campanha - URCAMP frente às exigências legais

    Directory of Open Access Journals (Sweden)

    Mirna Susana Viera de Martínez

    2012-01-01

    Full Text Available http://dx.doi.org/10.5007/1983-4535.2012v5n1p172   O artigo investiga sobre a Gestão da Universidade da Região da Campanha- Urcamp, uma instituição comunitária do Estado do Rio Grande do Sul- Brasil frente às políticas legais que organizam e estruturam a Educação Superior a partir da promulgação da Lei 9.394 de 20 de dezembro de 1996, e as implicações que ocasionaram para as Universidades particulares que precisaram rever seus modelos de gestão e métodos administrativos para serem propulsoras de inovações técnicas, científicas e sociais necessárias ao desenvolvimento regional. Para isso foi feita uma análise dos documentos legais da Instituição ( PDI, PPC,  resultados das avaliações in loco feitas por avaliadores externos para reconhecimento e avaliação dos cursos de graduação, resultados do desempenho dos alunos no ENADE e resultados da avaliação interna da Universidade (CPA. Após a análise documental ser possível apontar propostas de soluções para as fragilidades encontradas. Podendo indicar como conclusões provisórias a necessidade de uma gestão compartilhada que lute cada vez mais pelo desenvolvimento de um ensino de qualidade na IES, incentivando o comprometimento, a capacitação e formação continuada dos docentes e corpo técnico administrativo,assim como, a implementação de estratégias de realinhamento da gestão.

  12. 75 FR 14257 - Pricing for Bronze Medals

    Science.gov (United States)

    2010-03-24

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF THE TREASURY United States Mint Pricing for Bronze Medals AGENCY: United States Mint, Department of the Treasury. ACTION: Notice. SUMMARY: The United States Mint is announcing the price of the 1\\5/16\\- inch bronze...

  13. The Bronze Age Smith as Individual

    DEFF Research Database (Denmark)

    Nørgaard, Heide Wrobel

    During 1550-1100 BC magnificent decorated bronze objects appear in grave and hoard finds in Northwest Europe. While investigating similarities in the decorative elements of bronze objects belonging to the female gender, it is possible to find traces of the production process. These distinctive fe...

  14. Behaviour of millscale reinforced Aluminium Bronze composite ...

    African Journals Online (AJOL)

    Despite the desirable characteristics exhibited by most aluminium bronze, the deficient responses in certain critical applications have necessitated improvement in the mechanical properties. The microstructural and mechanical properties of cast aluminium bronze reinforced with iron millscale particles were investigated in ...

  15. New Research on Bronze Age Textile Production

    DEFF Research Database (Denmark)

    Andersson, Eva Birgitta; Mårtensson, Linda; Nosch, Marie-Louise Bech

    2008-01-01

    presentation of the results from the systematic tests with Bronze Age textile tools. results concerning mesurements of lenght and time consumed.......presentation of the results from the systematic tests with Bronze Age textile tools. results concerning mesurements of lenght and time consumed....

  16. Vegetables, Coctails & Reflections / Marco Laimre

    Index Scriptorium Estoniae

    Laimre, Marko, 1968-

    2006-01-01

    Pealkirja "Vegetables, Coctails & Reflections" kandis Tallinna Kunstihoones 8.04.-28.05.2006 avatud Elin Kardi, Marko Mäetamme, Marco Laimre ja Andres Tali ühisnäitusel "Vägivald ja propaganda" Marco Laimre installatsioon. Marco Laimre esinemine raadiosaates "kunst.er" Klassikaraadios 16.04.2006

  17. A reforma do marco legal do terceiro setor no Brasil : a criação da Lei das OSCIP (lei 9.790/99)

    OpenAIRE

    Ferrarezi, Elisabete Roseli

    2009-01-01

    O principal objetivo desta tese é compreender quais foram os principais fenômenos políticos e sociais que propiciaram que a reforma da legislação relativa ao terceiro setor entrasse na agenda governamental e tivesse êxito com a promulgação da Lei 9.790/99, que criou a qualificação de Organização da Sociedade Civil de Interesse Público (OSCIP) para as pessoas jurídicas de direito privado sem fins lucrativos. Elementos geralmente apontados como impulsionadores de ações públicas como uma c...

  18. N De Marco

    Indian Academy of Sciences (India)

    N De Marco. Articles written in Pramana – Journal of Physics. Volume 60 Issue 4 April 2003 pp 817-828. Study of deconfinement in NA50 · Paula bordalo M C Abreu B Alessandro C Alexa R Arnaldi M Atayan C Baglin A Baldit M Bedjidian S Beolé V Boldea Paula Bordalo S R Borenstein C Borges A Bussiére L Capelli C ...

  19. Marco Calamari, La scomparsa della rete

    Directory of Open Access Journals (Sweden)

    Maria Chiara Pievatolo

    2011-12-01

    Full Text Available Chi era in rete prima che fosse invasa dalle moltitudini – scrive Marco Calamari su “Punto Informatico” – temeva principalmente la sua occupazione “militare” da parte degli stati,  tramite una censura e un controllo capillare. Non è andata esattamente così. L’”economia del dono“, per la sua eccellenza tecnica, ha retto alla pressione delle masse e [...

  20. Análise cristalográfica da solução sólida com estrutura tipo Tungstênio Bronze de niobato de potássio e estrôncio dopado com ferro Crystallographic analysis of the solid solution of iron doped potassium strontium niobate with tetragonal tungsten bronze structure

    Directory of Open Access Journals (Sweden)

    Silvania Lanfredi

    2010-01-01

    Full Text Available Solid solution of iron doped potassium strontium niobate with KSr2(FeNb4O15-Δ stoichiometry was prepared by high efficiency ball milling method. Structural characterization was carried out by X-ray diffraction. Crystalline structure was analyzed by the Rietveld refinements using the FullProf software. The results showed a tetragonal system with the tetragonal tungsten bronze structure - TTB (a = 12.4631 (2 Å and c = 3.9322 (6 Å, V = 610.78 (2 ų. In this work, the sites occupancy by the K+, Sr2+ and Fe3+ cations on the TTB structure were determined. NbO6 polihedra distortion and its correlation with the theoretical polarization are discussed.

  1. Population genomics of Bronze Age Eurasia.

    Science.gov (United States)

    Allentoft, Morten E; Sikora, Martin; Sjögren, Karl-Göran; Rasmussen, Simon; Rasmussen, Morten; Stenderup, Jesper; Damgaard, Peter B; Schroeder, Hannes; Ahlström, Torbjörn; Vinner, Lasse; Malaspinas, Anna-Sapfo; Margaryan, Ashot; Higham, Tom; Chivall, David; Lynnerup, Niels; Harvig, Lise; Baron, Justyna; Della Casa, Philippe; Dąbrowski, Paweł; Duffy, Paul R; Ebel, Alexander V; Epimakhov, Andrey; Frei, Karin; Furmanek, Mirosław; Gralak, Tomasz; Gromov, Andrey; Gronkiewicz, Stanisław; Grupe, Gisela; Hajdu, Tamás; Jarysz, Radosław; Khartanovich, Valeri; Khokhlov, Alexandr; Kiss, Viktória; Kolář, Jan; Kriiska, Aivar; Lasak, Irena; Longhi, Cristina; McGlynn, George; Merkevicius, Algimantas; Merkyte, Inga; Metspalu, Mait; Mkrtchyan, Ruzan; Moiseyev, Vyacheslav; Paja, László; Pálfi, György; Pokutta, Dalia; Pospieszny, Łukasz; Price, T Douglas; Saag, Lehti; Sablin, Mikhail; Shishlina, Natalia; Smrčka, Václav; Soenov, Vasilii I; Szeverényi, Vajk; Tóth, Gusztáv; Trifanova, Synaru V; Varul, Liivi; Vicze, Magdolna; Yepiskoposyan, Levon; Zhitenev, Vladislav; Orlando, Ludovic; Sicheritz-Pontén, Thomas; Brunak, Søren; Nielsen, Rasmus; Kristiansen, Kristian; Willerslev, Eske

    2015-06-11

    The Bronze Age of Eurasia (around 3000-1000 BC) was a period of major cultural changes. However, there is debate about whether these changes resulted from the circulation of ideas or from human migrations, potentially also facilitating the spread of languages and certain phenotypic traits. We investigated this by using new, improved methods to sequence low-coverage genomes from 101 ancient humans from across Eurasia. We show that the Bronze Age was a highly dynamic period involving large-scale population migrations and replacements, responsible for shaping major parts of present-day demographic structure in both Europe and Asia. Our findings are consistent with the hypothesized spread of Indo-European languages during the Early Bronze Age. We also demonstrate that light skin pigmentation in Europeans was already present at high frequency in the Bronze Age, but not lactose tolerance, indicating a more recent onset of positive selection on lactose tolerance than previously thought.

  2. Population genomics of Bronze Age Eurasia

    OpenAIRE

    Allentoft Morten E.; Sikora Martin; Sjögren Karl-Göran; Rasmussen Simon; Rasmussen Morten; Stenderup Jesper; Damgaard Peter B.; Schroeder Hannes; Ahlström Torbjörn; Vinner Lasse; Malaspinas Anna-Sapfo; Margaryan Ashot; Higham Tom; Chivall David; Lynnerup Niels

    2015-01-01

    The Bronze Age of Eurasia (around 3000–1000 BC) was a period of major cultural changes. However there is debate about whether these changes resulted from the circulation of ideas or from human migrations potentially also facilitating the spread of languages and certain phenotypic traits. We investigated this by using new improved methods to sequence low coverage genomes from 101 ancient humans from across Eurasia. We show that the Bronze Age was a highly dynamic period involving large scale p...

  3. DA DEMOCRACIA À CIBERDEMOCRACIA: CONDIÇÕES E (IN)EFETIVIDADE DA PARTICIPAÇÃO POPULAR NA CONSTRUÇÃO COLABORATIVA DO MARCO CIVIL DA INTERNET

    OpenAIRE

    Leticia Bodanese Rodegheri

    2015-01-01

    A democracia representativa atravessa um período de transformações, pois ao mesmo tempo em que é o regime político de governo adotado na generalidade de países, vem sendo objeto de muitas críticas. Há a percepção de afastamento entre cidadãos e representantes, de desvios de verbas públicas e de corrupção, situações que remetem às seis promessas não-cumpridas da democracia trazidas por Norberto Bobbio. Com a finalidade de alterar esse cenário, as Tecnologias de Informação e Comunicação (TIC), ...

  4. Crystallography properties of solid solution of NaSr{sub 2}(NiNb{sub 4})O{sub 15-{delta}s}tructure of tetragonal tungsten bronze; Propriedades cristalograficas da solucao de NaSr{sub 2}(NiNb{sub 4})O{sub 15-{delta}} de estrutura tetragonal tungstenio bronze

    Energy Technology Data Exchange (ETDEWEB)

    Polini, C.; Dantas, S.A.; Mikaro, C.; Lima, A.R.F.; Nobre, M.A.L.; Lanfredi, S. [Universidade Estadual Paulista (LaCCeF/UNESP), Presidente Prudente, SP (Brazil). Dept. de Fisica, Quimica e Biologia. Lab. de Compositos e Ceramicas Funcionais

    2009-07-01

    In this work was investigated the crystallographic characterization of single phase and nanometric powders of sodium strontium niobate doped with nickel, with NaSr{sub 2}(NiNb{sub 4})O{sub 15-{delta}} stoichiometry, prepared by conventional route from mechanical mixture of oxides / carbonates using the high energy ball milling. The optimization of the parameters as time and calcination temperature for the preparation of the NaSr{sub 2}(NiNb{sub 4})O{sub 15-{delta}} solid solution were monitored by X-ray diffraction, using the Rietveld method. The NaSr{sub 2}(NiNb{sub 4})O{sub 15-{delta}} single phase powders with tetragonal tungsten bronze type structure were obtained with crystallite size at around 30 nm. From crystallographic parameters was constructed the unitary cellule of the NaSr{sub 2}(NiNb{sub 4})O{sub 15-{delta}} using the CaRIne Crystallography 3.1 program. The occupation of sites by the Na{sup +} and Sr{sup 2+} cations and the interatomic distances between nickel and niobium atoms were determined. Changes in structural parameters of sodium strontium niobate by addition of nickel are discussed. (author)

  5. Marcos referenciais da trajetória das políticas de alimentação e nutrição no Brasil Milestones of the feeding policies and nutrition in Brazil

    Directory of Open Access Journals (Sweden)

    Bertoldo Kruse Grande de Arruda

    2007-09-01

    Full Text Available Os marcos que influenciaram a concepção e a implementação de propostas inovadoras no campo da nutrição surgiram na década de 30. O inquérito promovido por Josué de Castro no Recife, em 1933, sobre as condições de vida das classes operárias revelou a ocorrência de déficit calórico e de nutrientes e motivou o desenvolvimento de novas pesquisas acerca da situação alimentar em Pernambuco, Rio de Janeiro e São Paulo, estabelecendo as relações entre alimentação e salário mínimo. Para dar assistência ao governo na formulação da Política Nacional de Alimentação e Nutrição foi criado o Instituto Nacional de Alimentação e Nutrição (INAN, em 1972, e elaborado o I Programa Nacional de Alimentação e Nutrição (PRONAN, envolvendo 12 subprogramas das diversas estruturas governamentais e, com olhar inovador da desnutrição como uma doença social foi substituído, em 1976, pelo II PRONAN. A extinção do INAN, em 1997, conduziu ao surgimento da Coordenação Geral da Política de Alimentação e Nutrição, responsável pela elaboração da Política Nacional de Alimentação e Nutrição no contexto da Segurança Alimentar e Nutricional, criando em 2001 o Programa Bolsa Alimentação. A criação do Conselho Nacional de Segurança Alimentar, em 1993, fomentou a aprovação do Programa Fome Zero. Identifica-se que na realidade brasileira, a avaliação das políticas públicas é um campo tradicionalmente marcado pela carência de procedimentos sistemáticos.The milestones of the concept and implementation of innovative proposals in the field of nutrition appeared in the 30's. The 1933 survey performed by Josué de Castro in Recife focusing the qualify of life of the working classes determined calories' and nutrients' deficiencies and encouraged the development of new researches focusing on the food situation in Pernambuco, Rio de Janeiro and São Paulo, esta-blishing a relationship between food and minimum wage. To

  6. Bronze-mean hexagonal quasicrystal

    Science.gov (United States)

    Dotera, Tomonari; Bekku, Shinichi; Ziherl, Primož

    2017-10-01

    The most striking feature of conventional quasicrystals is their non-traditional symmetry characterized by icosahedral, dodecagonal, decagonal or octagonal axes. The symmetry and the aperiodicity of these materials stem from an irrational ratio of two or more length scales controlling their structure, the best-known examples being the Penrose and the Ammann-Beenker tiling as two-dimensional models related to the golden and the silver mean, respectively. Surprisingly, no other metallic-mean tilings have been discovered so far. Here we propose a self-similar bronze-mean hexagonal pattern, which may be viewed as a projection of a higher-dimensional periodic lattice with a Koch-like snowflake projection window. We use numerical simulations to demonstrate that a disordered variant of this quasicrystal can be materialized in soft polymeric colloidal particles with a core-shell architecture. Moreover, by varying the geometry of the pattern we generate a continuous sequence of structures, which provide an alternative interpretation of quasicrystalline approximants observed in several metal-silicon alloys.

  7. A bronze amulet from Sidak

    Directory of Open Access Journals (Sweden)

    Smagulov Erbulat A.

    2014-03-01

    Full Text Available A bronze amulet in the shape of a horseman found on the citadel of the Sidak fortified settlement site in Turkestan district, Southern Kazakhstan oblast is described in the article. Similar findings are met on the vast Eurasian area ranging from Mongolia to the Urals. The published item may be referred to a series of similar finds from the handicraft centers located in the Syr Darya river basin, such as Khujand, Kanka, and, lately, Sidak. Handicraft centers of Sogdiana are traditionally regarded as places of their manufacture. However, no finds of the kind are mentioned at proper Sogdian towns (Penjikent, Paikend, Afrasyab, etc., which have been thoroughly studied. Hence, the author makes a conclusion that these amulets, as well as many other pieces of jewelry were manufactured in the 7th to 8th centuries AD at the handicraft centers of Chach, a state formation comprising the Middle Syr-Darya River oases at the time. This region was inhabited by the descendants of the ancient Kangju state inhabitants, who inherited cultural traditions of the past, including the myths about the hero-horseman.

  8. Marco Grippeling (1966-2014)

    CERN Document Server

    2014-01-01

    It was with great sadness that we learnt that our former colleague and friend Marco Grippeling was amongst the victims of the Malaysia Airlines crash.   Marco, a Melbourne-based cyber security specialist, boarded flight MH17 on his way back to Australia after spending his last days with friends and family in his home country of the Netherlands. Marco joined CERN as a Technical Student in the PS Division in 1992.  In 1994 he moved to the LHC Division as a Staff Member, leaving for more exotic horizons in 2000. Marco will always be remembered for his enthusiasm and joie de vivre. Our deepest condolences go to his family and friends at this time. His former colleagues and friends at CERN

  9. 77 FR 14600 - Pricing for 2012 Kennedy Half-Dollar Bags and Rolls, Bronze Medals, the First Spouse Bronze Medal...

    Science.gov (United States)

    2012-03-12

    ... United States Mint Pricing for 2012 Kennedy Half-Dollar Bags and Rolls, Bronze Medals, the First Spouse.... SUMMARY: The United States Mint is announcing 2012 pricing for Kennedy Half-Dollar bags and rolls, bronze medals, the First Spouse Bronze Medal Set and the Birth Set. Product Retail price Kennedy Half-Dollar...

  10. Bismuth bronze from machu picchu, peru.

    Science.gov (United States)

    Gordon, R B; Rutledge, J W

    1984-02-10

    The decorative bronze handle of a tumi excavated at the Inca city of Machu Picchu, Peru, contains 18 percent bismuth and appears to be the first known example of the use of bismuth with tin to make bronze. The alloy is not embrittled by the bismuth because the bismuth-rich constituent does not penetrate the grain boundaries of the matrix phase. The use of bismuth facilitates the duplex casting process by which the tumi was made and forms an alloy of unusual color.

  11. Population genomics of Bronze Age Eurasia

    DEFF Research Database (Denmark)

    Allentoft, Morten E.; Sikora, Martin; Sjögren, Karl-Göran

    2015-01-01

    investigated this by using new, improved methods to sequence low-coverage genomes from 101 ancient humans from across Eurasia. We show that the Bronze Age was a highly dynamic period involving large-scale population migrations and replacements, responsible for shaping major parts of present-day demographic...

  12. Growth of Tungsten Bronze Family Crystals

    Science.gov (United States)

    1989-03-01

    Keesrer. Mater Res BuL 15 t]s , 13(5the discussions on this. research b\\ Profesor .f J[19] R R Neurgaonkar W.K Cot.s and J R (Oi,’e- I-errocl. s otncs 35...L" tic . 22 𔃻 als, demonstrated’ the growth of excellent qual;tv bronze !N’BO.0. substrates using thie LPL and sputtering techniques. C.Car. to gt

  13. Uncommon corrosion phenomena of archaeological bronze alloys

    Science.gov (United States)

    Ingo, G. M.; de Caro, T.; Riccucci, C.; Khosroff, S.

    2006-06-01

    In the framework of the EFESTUS project (funded by the European Commission, contract No. ICA3-CT-2002-10030) the corrosion products of a large number of archaeological bronze artefacts are investigated by means of the combined use of scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD) and optical microscopy (OM) and tentative correlation of their nature with the chemical composition of the artefacts and the burial context is proposed. The results provide good insight into the corrosion layers and evidence in some bronze Roman coins and artefacts; the occurrence of uncommon corrosion phenomena that give rise to the formation of a yellowish-green complex chlorine-phosphate of lead (pyromorphite, (PbCl)Pb4(PO4)3) and of a gold-like thick layer of an iron and copper sulphide (chalcopyrite, CuFeS2). The micro-chemical and micro-structural results show that the coins were buried in a soil enriched in phosphorus for the accidental presence of a large amount of decomposing fragments of bones or in an anaerobic and humus rich soil where the chalcopyrite layer has been produced via the interaction between the iron of the soil, the copper of the coin and the sulphur produced by the decomposition of organic matter in an almost oxygen free environment. Finally, some unusual periodic corrosion phenomena occurring in high tin bronze mirrors found at Zama (Tunisia) are described.

  14. Examination of Ife Bronze Casting Culture and Its Decline in ...

    African Journals Online (AJOL)

    Ile-Ife, the Yoruba ancient city is known for its vibrant cultural environment. This city of ancient civilization and one of the home for bronze casting in the Western region of Nigeria have made significant contributions to the world of culture through its great artistic traditions in terracotta, bead making, bronze and brass casting ...

  15. The thermal analysis and derivative bronzes cast to plaster moulds

    Directory of Open Access Journals (Sweden)

    B. Pisarek

    2009-07-01

    Full Text Available It plaster moulds gets casted the alloys of following metals: Al, Cu, Ag, Au in precise and artistic founding. The investigation of the crys-tallization of bronzes in hot plaster moulds the method of the thermal analysis and derivative (TDA was not realized out so far. Probe TDAg and tripod enabling the execution of measurements on inductive casting machine INDUTHERM-VC 500D were designed for this technology especially. It was confirmed that one the method TDA can identify the crystallization process of the bronze in hot plaster moulds. The investigations of the superficial distribution of the concentration of elements in the microstructure of the studied grades of the bronze on X-ray microanalizer were conducted. It results that they be subject to in bronze CuSn10-C (B10 and the CuSn5Zn5Pb5-C (B555 of strong microsegregation from conducted investigations: Pb, Sn and Sb. The single separates of intermetallic phase κ was identified in the bronze B10 rich first of all in Zn, Sn, Sb and Fe, and two intermetallic phase, one rich were identified in the bronze B555 first of all in Zn, Sb, (Nor, Fe and second rich in Sn, Sb, (Nor, Fe. The most homogeneous microstructure from the bronze CuAl10Fe5Ni5-C (BA1055 is characterizes among the studied grades of the bronze in the cast state.

  16. Thermal and Electrical Conductivity Measurements of CDA 510 Phosphor Bronze

    Science.gov (United States)

    Tuttle, James E.; Canavan, Edgar; DiPirro, Michael

    2009-01-01

    Many cryogenic systems use electrical cables containing phosphor bronze wire. While phosphor bronze's electrical and thermal conductivity values have been published, there is significant variation among different phosphor bronze formulations. The James Webb Space Telescope (JWST) will use several phosphor bronze wire harnesses containing a specific formulation (CDA 510, annealed temper). The heat conducted into the JWST instrument stage is dominated by these harnesses, and approximately half of the harness conductance is due to the phosphor bronze wires. Since the JWST radiators are expected to just keep the instruments at their operating temperature with limited cooling margin, it is important to know the thermal conductivity of the actual alloy being used. We describe an experiment which measured the electrical and thermal conductivity of this material between 4 and 295 Kelvin.

  17. Marco para la Ciencia Abierta

    OpenAIRE

    F.J. García-Peñalvo

    2017-01-01

    El seminario “Marco para la Ciencia Abierta” se impartió el día 4 de diciembre de 2017 en Campus Monterrey del Tecnológico de Monterrey dentro de la Estancia internacional UNESCO/ICDE del movimiento educativo abierto 2017, del 04 al 15 de diciembre 2017. En dicho evento se han dado cita más de 80 participantes, de 13 países con el objeto de construir colaborativamente proyectos abiertos para la educación, en el contexto de los participantes. En este seminario se va a introducir el c...

  18. Avaliação das constantes elásticas de bronzes vazados com alto teor em estanho

    OpenAIRE

    Marreiros, Ricardo Miguel Martins

    2014-01-01

    Este estudo pretendeu caracterizar as constantes elásticas de bronzes com alto teor em estanho e, em particular, da fase intermetálica delta (~32 wt.% Sn) à temperatura ambiente. Esta caracterização é importante para a previsão das propriedades acústicas dos sinos, pelo que especial atenção foi também dada à composição média das ligas Cu-Sn usadas na fundição sineira. Estes bronzes, devido ao caráter frágil da fase delta, não são processados termo-mecanicamente, apresentando-se na condição de...

  19. Russian meteorite Bronze Age (rock record)

    CERN Document Server

    Vodolazhskaya, Larisa

    2013-01-01

    This paper presents the results of a study of petroglyphs found in the quartzite grotto near the Skelnovsky small village in the Northern Black Sea in the South of Russia. The aim of the study was the analysis and interpretation of the Early Bronze Age petroglyphs using archaeoastronomical methods. The article presents a comparative analysis of Skelnovsky grotto ancient images and contemporary eyewitness accounts of the Sikhote-Alin meteorite fall and meteorite shower. Some petroglyphs were interpreted by us using ethnographic and folklore material. In this study, the magnetic declination for the geographical coordinates Skelnovsky farm was calculated, and the projection of the whole picture Skelnovskih petroglyphs on the topographical map of the area was built. The proposed location of the meteorite fall was determined with this projection. It is confirmed by satellite pictures, on which are the distinguishable terrain features, typical for the meteorite fall, are visible including the possible impact crater...

  20. Bronze Age stone worlds of Bodmin Moor: excavating Leskernick

    Directory of Open Access Journals (Sweden)

    Sue Hamilton

    1999-11-01

    Full Text Available Most archaeological work on the British Bronze Age has been undertaken in Wessex. Here a team fr om UCL' s Institute of Archaeology and Department of Anthropology describe their investigation of a very different Bronze Age landscape on Bodmin Moor in Cornwall. Their project, at the site of Leskernick, is innovative in its methodology and in how it is presented to the public.

  1. Deformability of niobium and tin bronze during compression

    Science.gov (United States)

    Nikulin, S. A.; Rozhnov, A. B.; Aliev, R. M.; Rogachev, S. O.; Khatkevich, V. M.; Abdyukhanov, I. M.; Dergunova, E. A.; Traktirnikova, N. V.

    2015-10-01

    The deformability of Cu-14.5 wt % Sn-0.25 wt % Ti bronze and pure niobium (99.84%) is studied during compression tests. It is found that an increase in the strain rate or a decrease in the test temperature can improve the strength characteristics of both materials. The strength properties of bronze are more sensitive to a change in the temperature-rate deformation conditions.

  2. 76 FR 72369 - Safety Zone; Marco Island Marriott Charity Fireworks Display, Gulf of Mexico, Marco Island, FL

    Science.gov (United States)

    2011-11-23

    ... No. USCG-2011-0968] RIN 1625-AA00 Safety Zone; Marco Island Marriott Charity Fireworks Display, Gulf of Mexico, Marco Island, FL AGENCY: Coast Guard, DHS. ACTION: Notice of proposed rulemaking. SUMMARY... the vicinity of Marco Island Marriott Beach Resort in Marco Island, Florida during the Marco Island...

  3. Morfometria de Papilioninae (Lepidoptera, Papilionidae ocorrentes em quatro localidades do Rio Grande do Sul, Brasil. III. Análise da forma das asas através de marcos anatômicos Morphometrics of Papilioninae (Lepidoptera, Papilionidae occurring in four communities from Rio Grande do Sul, Brazil. III. Shape wing analysis by landmarks

    Directory of Open Access Journals (Sweden)

    Rocco Alfredo Di Mare

    2004-12-01

    Full Text Available Neste estudo investigou-se a variação na morfologia das asas anteriores de 11 espécie de Papilioninae, coletadas em quatro localidades do Rio Grande do Sul. As análises foram realizadas usando descritores de forma a partir de marcos anatômicos, área das asas, e área, comprimento e largura da célula discal. Diferenças na configuração de consenso para a forma da asa entre as asas dos machos e das fêmeas não foram significantes, embora apresentem um grau de correlação elevado. A forma da asa não diferiu entre as quatro comunidades investigadas. As diferenças observadas na forma de asa das espécies estudadas poderiam ser mais bem explicadas por mudanças independentes associadas com diferentes áreas da asa, principalmente com a célula discal.This study investigated variation in the forewing morphology of 11 butterfly species (Papilioninae, sampled in four communities of the Rio Grande do Sul State. The analyses were performed using descriptors of shape derived from anatomical landmarks, wing areas, and area, length and width of the discal cell. Differences in the consensus configuration for wing shape between male and female wings were not significant, showing a high correlation degree. The wing shape did not differ among the four communities investigated. The observed differences in wing shape of the species studied here should be better explained by independent changes associated with different areas of the wing, mainly with the discal cell.

  4. A abordagem cognitiva em pontos de inclusão digital em cidades da Bahia: marco teórico-metodológico Enfoque cognitivo en puntos de acceso a la inclusión digital en ciudades de Bahía: conceptos y método Cognitive Approach in the Digital Inclusion Point in Bahia's Towns: methodologic Theoretical Framework

    Directory of Open Access Journals (Sweden)

    Barbara Coelho Neves

    2009-12-01

    Full Text Available A presente comunicação visa relatar alguns progressos da pesquisa interessada em compreender o processo de mediação desenvolvido pelos pontos de inclusão digital (PIDs em cidades do estado da Bahia (Brasil. O objetivo é verificar se os modelos de acesso desenvolvidos nos PIDs, considerados como os de maior inclusão digital, favorecem a convergência de recursos (físicos, digitais, humanos e sociais. O marco teórico utilizado na investigação é apresentado, descrevendo os conceitos de tecnologia e de mediação pautada na cognição para contextualizar o objeto, centrando na compreensão da convergência de recursos cognitivos. A metodologia é descritiva, estando em desenvolvimento em 10 cidades.La presente comunicación detalla algunos de los avances de la investigación dedicada a comprender el proceso de mediación desarrollado por los puntos de inclusión digital (PIDs en ciudades del estado de Bahía (Brasil. El objetivo es verificar si los modelos de acceso desarrollados en los PIDs, considerados como los de mayor inclusión digital, favorecen la convergencia de recursos (físicos, digitales, humanos y sociales. Se presenta el marco teórico utilizado en la investigación para describir los conceptos de tecnología y de mediación pautada en la cognición, con el propósito de contextualizar el objeto, se enfoca en la comprensión de la convergencia de recursos cognitivos. El método es descriptivo, y se está aplicando en 10 ciudades.This work shows the progress of the research that intended to understand the mediation process developed by the access points of digital inclusion (PIDs in Bahia's towns (Brazil. It describes the first steps of the research, but progress is being made in concepts that allow us to understand the mediation process, focusing on the convergence of cognitive resources. The general purpose is to verify that the access models developed in Bahia's PIDs, which are considered of greater digital inclusion

  5. Marcos definidores da condição juvenil para católicos e pentecostais na baixada fluminense - algumas proposições a partir de um survey

    Directory of Open Access Journals (Sweden)

    Silvia Regina Alves Fernandes

    2011-06-01

    Full Text Available Resumo: O artigo analisa dados parciais de um survey com jovens católicos em paróquias e jovens pentecostais em Igrejas da Baixada Fluminense, no Rio de Janeiro. A pesquisa mais ampla discutiu ainda representações da política e noções de desenvolvimento. A proposta do presente artigo é apresentar elementos que favoreçam o delineamento do perfil de jovens religiosos; a compreensão sobre formas de construção da identidade juvenil e, ainda, alguns aspectos comportamentais, tais como sexualidade e drogas. Os resultados indicam aproximações e diferenças desses jovens em relação aos dois segmentos analisados e quando comparados a jovens metropolitanos em geral.

  6. Setup of Galvanic Sensors for the Monitoring of Gilded Bronzes

    Directory of Open Access Journals (Sweden)

    Sara Goidanich

    2014-04-01

    Full Text Available Traditional electrochemical techniques, such as linear polarization resistance (Rp, and electrochemical impedance spectroscopy (EIS, cannot be applied to gilded bronzes, as it may not be possible to interpret the results obtained due to the bimetallic nature of the studied material. The measurement of the macrocouple current generated by the gold/bronze galvanic couple can be used as an indicator of degradation processes. Nevertheless, this measurement cannot be performed directly on the original artifacts due to the systematic presence of short-circuits between the two metals. In the present work the use of galvanic sensors is proposed as a possible solution for the monitoring of gilded bronze artefacts. The sensors have been designed to simulate real gilded bronze surfaces in terms of composition and stratigraphy and have proved to be a reliable diagnostic tool for the in situ monitoring of the rates of deterioration of gilded bronze surfaces and to test new conservation treatments. Their set-up and application is reported and their performances discussed.

  7. As estratégias de cooperação Sul-Sul nos marcos da política externa brasileira de 1993 a 2007 South-South cooperation strategies in Brazilian Foreign Policy from 1993 to 2007

    Directory of Open Access Journals (Sweden)

    Miriam Gomes Saraiva

    2007-12-01

    Full Text Available O objetivo do artigo é analisar as duas vertentes da cooperação sul-sul adotadas pela política externa brasileira entre 1993 e 2007. Por um lado, o artigo examina a política externa brasileira em face da América do Sul: o Mercosul e a cooperação sul-americana em termos mais gerais que, dentro do arco das atuações externas do país, é o tipo de cooperação sul-sul identificada como prioritária. Por outro lado, dedicará também algumas reflexões para a cooperação do Brasil com outros países considerados emergentes e system-affecting, em outros continentes, como é o caso da África do Sul, Índia, China e, em diferente medida, da Rússia.The aim of this article is to analyze the two approaches to South-South cooperation evident in Brazilian foreign policy between 1993 and 2007. On one hand the article examines Brazilian foreign policy towards South America. Specifically, cooperation with Mercosur members and South-American cooperation broadly conceptualized. The region is a foreign policy priority among its south-south cooperation activities. On the other hand, this paper reflects on Brazilian cooperation with other emerging and "system-affecting" countries that belong to other continents, such as South Africa, India and China, and to a certain extent, Russia.

  8. Effect of Heat Treatment on Microstructural Changes in Aluminium Bronze

    Directory of Open Access Journals (Sweden)

    Hájek J.

    2016-09-01

    Full Text Available This paper attempts to summarise the microstructural changes which take place in aluminium bronzes during heat treatment. Another objective of this study was to map the potential of a certain type of aluminium bronzes for undergoing martensitic transformation. The methods, which were chosen for assessing the results of heat treatment with regard to their availability, included measurement of hardness and observation of microstructure using light and scanning electron microscopy, Additional tools for evaluation of microstructure comprised measurement of microhardness and chemical analysis by EDS. An important part of the experiment is observation of microstructural changes in the Jominy bar during the end-quench test. Upon completing experiments of this kind, one can define the heat treatment conditions necessary for obtaining optimum properties. In addition, the paper presents important findings on how to improve the corrosion resistance of aluminium bronzes by special heat treatment sequences.

  9. Fabrication of a Bronze Age Sword using Ancient Techniques

    Science.gov (United States)

    Sapiro, David; Webler, Bryan

    2016-12-01

    A khopesh was cast and forged for the TMS 2016 Bladesmithing Symposium. The khopesh was the first sword style, originating during the Bronze Age in the Near East. The manufacturing process used in this study closely followed Bronze Age techniques to determine the plausibility of open mold casting coupled with cold work and annealing cycles. Forging and annealing cycles substantially increased blade strength and diminished intergranular δ-phase inclusions. While a functional blade was not completed due to casting defects, the process gives valuable insight into the effort required to fabricate a khopesh during the Bronze Age. Forging and annealing cycles following casting were necessary to produce the mechanical properties desired in a sword.

  10. Archaeological investigations of the Bronze Age village of Bagnara di Romagna (RA

    Directory of Open Access Journals (Sweden)

    Maurizio Cattani

    2014-12-01

    Full Text Available This paper summarizes the results of researches carried out in the area next to the modern village of Bagnara di Romagna (RA, where several evidences related to a Bronze Age settlement have been collected. Recently test trenches and surface collections allowed to retrieve bronze and ceramics dating from the Middle Bronze Age (phase BM2 to the Recent Bronze Age (phase BR2. The analysis of landscape and the palaeoenvironmental reconstruction complete the outline of the region of Imola, Faenza and Lugo during the Bronze Age where are well known the ancient settlements of Solarolo, via Ordiere, Monte Castellaccio end S. Giuliano di Toscanella.

  11. Confirmation of the immunoreactivity of monoclonal anti-human C-terminal EGFR antibodies in bronze Corydoras Corydoras aeneus (Callichthyidae Teleostei) by Western Blot method.

    Science.gov (United States)

    Mytych, Jennifer; Satora, Leszek; Kozioł, Katarzyna

    2017-12-12

    Bronze corydoras (Corydoras aeneus) uses the distal part of the intestine as accessory respiratory organ. Our previous study showed the presence of epidermal growth factor receptor (EGFR) cytoplasmic domain in the digestive tract of the bronze corydoras. In this study, using Western Blot method, we validated the results presented in the previous research. In detail, results of Western Blot analysis on digestive and respiratory part of bronze corydoras intestine homogenates confirmed the immunoreactivity of anti-cytoplasmic domain (C-terminal) human EGFR antibodies with protein band of approximately 180kDa (EGFR molecular weight). This indicates a high homology of EGFR domain between these species and the possibility of such antibody use in bronze corydoras. Statistically significantly higher EGFR expression was observed in the respiratory part of intestine when compared to the digestive part. This implies higher proliferation activity and angiogenesis of epithelium in this part of intestine, creating conditions for air respiration. Therefore, Corydoras aeneus may be considered as a model organism for the molecular studies of the mechanisms of epithelial proliferation initiation and inhibition depending on hypoxia and normoxia. Copyright © 2017. Published by Elsevier GmbH.

  12. Community Geothermal Technology Program: Silica bronze project. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Bianchini, H.

    1989-10-01

    Objective was to incorporate waste silica from the HGP-A geothermal well in Pohoiki with other refractory materials for investment casting of bronze sculpture. The best composition for casting is about 50% silica, 25% red cinders, and 25% brick dust; remaining ingredient is a binder, such as plaster and water.

  13. Alarm calls of Bronze Mannikins communicate predator size to ...

    African Journals Online (AJOL)

    These groups were exposed to latex terrestrial snakes and mounted aerial raptors, and their alarm calls and predator response behaviours recorded. The Bronze Mannikins were able to discriminate between predators of different sizes, and increased their calling rate and decreased the end frequency of the alarm call in ...

  14. Aromatic quinoxaline as corrosion inhibitor for bronze in aqueous ...

    Indian Academy of Sciences (India)

    Administrator

    Keywords. Bronze; inhibitors; quinoxalin compounds; chloride solution; electrochemical studies. 1. Introduction. Heterocyclic organic compounds containing nitrogen, sulphur or oxygen atoms are often used to protect copper and copper alloy metals from corrosion. Among them, azoles compounds like triazoles, imidazoles ...

  15. Corrosion behavior of leaded-bronze alloys in sea water

    Energy Technology Data Exchange (ETDEWEB)

    Zohdy, K.M., E-mail: khalzohdy@yahoo.com [Higher Technological Institute, 10" t" h of Ramadan City (Egypt); Sadawy, M.M. [Mining and Petroleum Engineering Department, Al-Azhar University, Nasr City, Cairo 11371 (Egypt); Ghanem, M. [Industrial Education, Suez University (Egypt)

    2014-10-15

    The corrosion behavior of leaded-bronze alloys (Cu–5Sn–5Zn–5Pb, Cu–8Sn–8Zn–8Pb and Cu–10Sn–10Zn–10Pb) in sea water was investigated using weight loss method, open-circuit potential measurements (OCP), polarization techniques and electrochemical impedance spectroscopy (EIS). The nature and morphology of the corrosion products were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results showed that the corrosion resistance decreases with decreasing copper content. The XRD indicated that the composition of patina depends on the concentration of Cu, Sn, Zn and Pb in each alloy. - Highlights: • The corrosion potential of leaded bronze shifts to more noble potential. • The corrosion resistance increases with increasing amount of copper content in leaded bronze alloys. • The patina formed on Cu–5Sn–5Zn–5Pb is more uniform and protective than other alloys. • The composition of patina formed on leaded bronze depends on the concentration of Cu, Sn, Zn and Pb in the alloy.

  16. Foraging behaviour in tadpoles of the bronze frog Rana temporalis ...

    Indian Academy of Sciences (India)

    The ability of bronze frog Rana temporalis tadpoles (pure or mixed parental lines) to assess the profitability of food habitats and distribute themselves accordingly was tested experimentally using a rectangular choice tank with a non-continuous input design. Food (boiled spinach) was placed at two opposite ends of the ...

  17. Electrodeposited nanocrystalline bronze alloys as replacement for Ni

    NARCIS (Netherlands)

    Hovestad, A.; Tacken, R.A.; Mannetje, H.H.'t

    2008-01-01

    Nanocrystalline white-bronze, CuSn, electroplating was investigated as alternative to Ni plating as undercoat for noble metals in jewellery applications. A strongly acidic plating bath was developed with an organic additive to suppress hydrogen evolution and obtain bright coatings. Polarization

  18. Tribological study of a bronze obtained by Sintering proceeds ...

    African Journals Online (AJOL)

    ... of the lubricant, the atmosphere, and finally the time. In this work we present the effect of speed and load on the tribological characteristics of a Cu 8% Sn bronze pressure sintered self-lubricating mode for two lubricants with different viscosities. Keywords: sintering; powder metallurgy; tribology; lubrication; copper alloy.

  19. Portable XRF on Prehistoric Bronze Artefacts: Limitations and Use for the Detection of Bronze Age Metal Workshops

    DEFF Research Database (Denmark)

    Nørgaard, Heide Wrobel

    2017-01-01

    Two different scientific analyses—one destructive and one non destructive—were conducted on two separate groups of bronze ornaments dating from 1500–1100 BC to investigate, amongst other traits, the metal composition of their copper-tin alloys. One group of artefacts was sampled, and polished thi...

  20. Marcos normativos da anticoncepção de emergência e as dificuldades de sua institucionalização nos serviços públicos de saúde Legal framework of emergency contraception and the difficulties of its institutionalization in public health services

    Directory of Open Access Journals (Sweden)

    Rozana Aparecida de Souza

    2009-01-01

    Full Text Available Este artigo discute as dificuldades de implementação da Anticoncepção de Emergência (AE nas práticas do Sistema Único de Saúde, no período de 2000 a 2008, mediante revisão crítica da literatura sobre o tema e análise de documentos oficiais. Aponta avanços no âmbito da legislação em saúde para a utilização da AE, os quais permitem oficialmente reconhecê-la no país como alternativa contraceptiva em situações emergenciais, para além dos casos de violência sexual. O levantamento da literatura nacional e internacional, centrada na América Latina e em alguns estudos da Europa, dos EUA e do Canadá, suscita questões referentes à não-incorporação dessas normas nas práticas cotidianas dos serviços de saúde, revelando representações sociais difíceis de serem revertidas em pouco tempo. Documentos oficiais do MS e do CFM foram analisados para construção do marco legal e político-institucional que pauta a discussão. Os resultados mostram paradoxos entre as normas asseguradas e as práticas existentes nos serviços de saúde: dificuldade no acesso e utilização da AE via serviços públicos de saúde; a pílula do dia seguinte (PDS é comumente considerada abortiva por profissionais de saúde, usuárias e seus parceiros; embora pesquisas apontem aumento significativo do uso desse método, há resistência dos serviços a disponibilizá-lo; persiste a ideia recorrente no senso comum de que a AE levaria os usuários, principalmente adolescentes, a abandonar outros métodos contraceptivos de uso regular, inclusive preservativo, fato não confirmado pelos estudos realizados, pois eles indicam que os adolescentes que recorrem à AE são os que usam tal método.This paper discusses the difficulties to implement emergency contraception (EC in Brazilian Public Health Service, from 2000 to 2008, based on critical literature review and analysis of official documents on the theme. It shows advancements in health legislation

  1. Caracterização ultra-sônica de materiais ferroelétricos com estrutura perovskita e tungstênio-bronze Ultrasonic characterization of perovskite and tungsten-bronze ferroelectric materials

    Directory of Open Access Journals (Sweden)

    A. Moreno-Gobbi

    2002-03-01

    Full Text Available Atenuação e velocidade ultra-sônicas e, consequentemente, o módulo de Young de cerâmicas ferroelétricas com estrutura do tipo perovskita e tungstênio-bronze foram medidas entre 2,5 e 30 MHz, à temperatura ambiente, utilizando-se a técnica de pulso-eco. Composições com e sem chumbo foram testadas, mostrando que a presença do cátion Pb2+ representa fator importante no comportamento da atenuação. A dependência da atenuação com a freqüência é mais acentuada no caso dos ferroelétricos com estrutura perovskita. As discussões são baseadas nos modelos de espalhamento por grãos/poros em materiais policristalinos.Ultrasonic attenuation and velocity of ferroelectric ceramics with perovskite and tungsten-bronze structures were measured in a range of 2.5 to 30 MHz at room temperature, using the pulse-echo-overlap technique. Lead and non-lead compositions were analyzed, revealing that Pb2+ in the lattice affects the attenuation behavior. The frequency dependence of attenuation is clearly stronger for the lead materials with perovskite structure. The discussions are based on a qualitative analysis of grain/pore scattering models for polycrystalline materials

  2. Casting Simulation of an Austrian Bronze Age Sword Hilt

    Science.gov (United States)

    Pola, Annalisa; Mödlinger, Marianne; Piccardo, Paolo; Montesano, Lorenzo

    2015-07-01

    Bronze Age swords with a metal hilt can be considered the peak of Bronze Age casting technologies. To reconstruct the casting techniques used more than 3000 years ago, a metal hilted sword of the Schalenknauf type from Lower Austria was studied with the aid of macroscopic analyses and simulation of mold filling and casting solidification. A three-dimensional model of the hilt was created based on optical scanner measurements performed on a hilt recently discovered during archaeological excavations. Three different configurations of the gating system were considered, two on the pommel disk and one on the knob, and the effect of its location on the formation of casting defects was investigated. Three-dimensional computed tomography was used to detect internal defects, such as gas and shrinkage porosity, which were then compared with those calculated by simulation. The best match between actual and predicted hilt quality demonstrated the location of the gating system, which turned out to be on the pommel disk.

  3. Bronze Vessels with Over Vase Looped Handle of Capenate Manufacture

    Directory of Open Access Journals (Sweden)

    Nicolò Donati

    2012-10-01

    Full Text Available In the work presented we attempted to clarify the particular bronze vascular forms herein defined recipienti troncoconici ad ansa sormontante (“over vase loop handled frustoconical vessels”, often called mug, caccabus or kettle. Through a morphological analysis of the bronze vessel we proposed a hypothesized purpose of infusion or sauce preparation or a spiced wine container. The contextual analysis made it possible to date the articles between the mid-third and half of the second century BC, although some clues can extend the upper limit toward the end of the fourth century BC. The data context also allowed to suggest the site of Capena as production centre, since 31 of the 67 specimens come from the neighboring necropoles.

  4. Nettle as a distinct Bronze Age textile plant.

    Science.gov (United States)

    Bergfjord, C; Mannering, U; Frei, K M; Gleba, M; Scharff, A B; Skals, I; Heinemeier, J; Nosch, M-L; Holst, B

    2012-01-01

    It is generally assumed that the production of plant fibre textiles in ancient Europe, especially woven textiles for clothing, was closely linked to the development of agriculture through the use of cultivated textile plants (flax, hemp). Here we present a new investigation of the 2800 year old Lusehøj Bronze Age Textile from Voldtofte, Denmark, which challenges this assumption. We show that the textile is made of imported nettle, most probably from the Kärnten-Steiermark region, an area which at the time had an otherwise established flax production. Our results thus suggest that the production of woven plant fibre textiles in Bronze Age Europe was based not only on cultivated textile plants but also on the targeted exploitation of wild plants. The Lusehøj find points to a hitherto unrecognized role of nettle as an important textile plant and suggests the need for a re-evaluation of textile production resource management in prehistoric Europe.

  5. Post-transcriptional regulation of expression of the Bronze2 gene of Zea mays L.

    Science.gov (United States)

    Pairoba, Claudio F; Walbot, Virginia

    2003-09-01

    The glutathione S-transferase encoded by Bronze2 performs the last genetically defined step in maize anthocyanin biosynthesis, being required for pigment sequestration into vacuoles. The Bz2 primary transcript contains a single intron; in maize leaves both spliced and unspliced Bz2 transcripts are usually present and are predicted to encode 26 and 14 kDa proteins, respectively. To increase understanding of the role and regulation of Bz2 transcript splicing, we examined Bz2 expression during development in transgenic maize plants expressing a 35S:Bz2 (35S:mycBz2i) gene and, by transient expression analysis, in Black Mexican Sweet maize protoplasts. We show here that the gene is expressed in diverse tissues that lack functional copies of one or both transcription factors regulating anthocyanin synthesis, that transcript levels are much higher when the R/B plus C1/Pl transcription factors are present, and that the splicing decision depends on local sequence context. The predicted 14 kDa protein was never detected indicating that unspliced transcripts are likely to be non-coding. The native 26 kDa BZ2 protein is loosely membrane-bound, but it was detectable only in tissues accumulating anthocyanin. Consequently, BZ2 accumulation appears to be limited by stringent post-transcriptional regulation.

  6. Rewriting the Central European Early Bronze Age Chronology: Evidence from Large-Scale Radiocarbon Dating.

    Science.gov (United States)

    Stockhammer, Philipp W; Massy, Ken; Knipper, Corina; Friedrich, Ronny; Kromer, Bernd; Lindauer, Susanne; Radosavljević, Jelena; Wittenborn, Fabian; Krause, Johannes

    2015-01-01

    The transition from the Neolithic to the Early Bronze Age in Central Europe has often been considered as a supra-regional uniform process, which led to the growing mastery of the new bronze technology. Since the 1920s, archaeologists have divided the Early Bronze Age into two chronological phases (Bronze A1 and A2), which were also seen as stages of technical progress. On the basis of the early radiocarbon dates from the cemetery of Singen, southern Germany, the beginning of the Early Bronze Age in Central Europe was originally dated around 2300/2200 BC and the transition to more complex casting techniques (i.e., Bronze A2) around 2000 BC. On the basis of 140 newly radiocarbon dated human remains from Final Neolithic, Early and Middle Bronze Age cemeteries south of Augsburg (Bavaria) and a re-dating of ten graves from the cemetery of Singen, we propose a significantly different dating range, which forces us to re-think the traditional relative and absolute chronologies as well as the narrative of technical development. We are now able to date the beginning of the Early Bronze Age to around 2150 BC and its end to around 1700 BC. Moreover, there is no transition between Bronze (Bz) A1 and Bronze (Bz) A2, but a complete overlap between the type objects of the two phases from 1900-1700 BC. We thus present a revised chronology of the assumed diagnostic type objects of the Early Bronze Age and recommend a radiocarbon-based view on the development of the material culture. Finally, we propose that the traditional phases Bz A1 and Bz A2 do not represent a chronological sequence, but regionally different social phenomena connected to the willingness of local actors to appropriate the new bronze technology.

  7. Rewriting the Central European Early Bronze Age Chronology: Evidence from Large-Scale Radiocarbon Dating.

    Directory of Open Access Journals (Sweden)

    Philipp W Stockhammer

    Full Text Available The transition from the Neolithic to the Early Bronze Age in Central Europe has often been considered as a supra-regional uniform process, which led to the growing mastery of the new bronze technology. Since the 1920s, archaeologists have divided the Early Bronze Age into two chronological phases (Bronze A1 and A2, which were also seen as stages of technical progress. On the basis of the early radiocarbon dates from the cemetery of Singen, southern Germany, the beginning of the Early Bronze Age in Central Europe was originally dated around 2300/2200 BC and the transition to more complex casting techniques (i.e., Bronze A2 around 2000 BC. On the basis of 140 newly radiocarbon dated human remains from Final Neolithic, Early and Middle Bronze Age cemeteries south of Augsburg (Bavaria and a re-dating of ten graves from the cemetery of Singen, we propose a significantly different dating range, which forces us to re-think the traditional relative and absolute chronologies as well as the narrative of technical development. We are now able to date the beginning of the Early Bronze Age to around 2150 BC and its end to around 1700 BC. Moreover, there is no transition between Bronze (Bz A1 and Bronze (Bz A2, but a complete overlap between the type objects of the two phases from 1900-1700 BC. We thus present a revised chronology of the assumed diagnostic type objects of the Early Bronze Age and recommend a radiocarbon-based view on the development of the material culture. Finally, we propose that the traditional phases Bz A1 and Bz A2 do not represent a chronological sequence, but regionally different social phenomena connected to the willingness of local actors to appropriate the new bronze technology.

  8. Prevention of Dealloying in Manganese Aluminium Bronze Propeller: Part II

    OpenAIRE

    Napachat Tareelap; Kaysinee Sriraksasin; Nakorn Srisukhumbowornchai; Swieng Thuanboon; Choochat Nitipanyawong

    2014-01-01

    Due to the failure of manganese aluminium bronze (MAB) propeller caused by dealloying corrosion as described in Part I [1], this work aims to study the prevention of dealloying corrosion using aluminium and zinc sacrificial anodes. The results indicated that both of the sacrificial anodes could prevent the propeller from dealloying. Moreover, the dealloying in seawater was less than that found in brackish water. It was possible that hydroxide ions, from cathodic reaction, reacted with calcium...

  9. The poetics of silence in Marcos Siscar

    Directory of Open Access Journals (Sweden)

    Annita Costa Malufe

    2012-12-01

    Full Text Available The article presents the concept of silence contained in the poetry of Marcos Siscar (1964- from the dialogue with thinkers and artists of the twentieth century: a silence of excess, instead of the transcendent and unreachable silence of romantic or metaphysical poetry. The aim is to show how powerful this poetic silence paradigm shift nourishes the reading of his poem.

  10. Model of Cu-Al-Fe-Ni Bronze Crystallization

    Directory of Open Access Journals (Sweden)

    Pisarek B. P.

    2013-09-01

    Full Text Available According to the analysis of the current state of the knowledge shows that there is little information on the process of phase transformations that occur during the cooling Cu-Al-Fe-Ni hypo-eutectoid bronzes with additions of Cr, Mo and/or W, made additions individually or together, for the determination of: the type of crystallizing phases, crystallizing phases, order and place of their nucleation. On the basis of recorded using thermal and derivative analysis of thermal effects phases crystallization or their systems, analysis of the microstructure formed during crystallization - observed on the metallographic specimen casting ATD10-PŁ probe, analysis of the existing phase equilibrium diagrams forming elements tested Cu-Al-Fe-Ni bronze, with additions of Cr, Mo, W and/or Si developed an original model of crystallization and phase transformation in the solid state, the casting of high quality Cu-Al-Fe-Ni bronze comprising: crystallizing type phase, crystallizing phase sequence, place of nucleation.

  11. Investigations on dry sliding of laser cladded aluminum bronze

    Directory of Open Access Journals (Sweden)

    Freiße Hannes

    2016-01-01

    Full Text Available The aim of this study was to investigate the tribological behaviour of laser cladded aluminum bronze tool surfaces for dry metal forming. In a first part of this work a process window for cladding aluminum bronze on steel substrate was investigated to ensure a low dilution. Therefore, the cladding speed, the powder feed rate, the laser power and the distance between the process head and the substrate were varied. The target of the second part was to investigate the influence of different process parameters on the tribological behaviour of the cladded tracks. The laser claddings were carried out on both aluminum bronze and cold work tool steel as substrate materials. Two different particle sizes of the cladding powder material were used. The cladding speed was varied and a post-processing laser remelting treatment was applied. It is shown that the tribological behaviour of the surface in a dry oscillating ball-on-plate test is highly dependent on the substrate material. In the third part a deep drawing tool was additively manufactured by direct laser deposition. Furthermore, the tool was applied to form circular cups with and without lubrication.

  12. Matisse to Picasso: a compositional study of modern bronze sculptures.

    Science.gov (United States)

    Young, Marcus L; Schnepp, Suzanne; Casadio, Francesca; Lins, Andrew; Meighan, Melissa; Lambert, Joseph B; Dunand, David C

    2009-09-01

    Inductively coupled plasma-optical emission spectroscopy (ICP-OES) was used to determine the bulk metal elemental composition of 62 modern bronze sculptures cast in Paris in the first half of the twentieth century from the collections of The Art Institute of Chicago and the Philadelphia Museum of Art. As a result, a comprehensive survey of the alloy composition of the sculptures of many prominent European artists of the early twentieth century is presented here for the first time. The sculptures in this study consist of predominantly copper with two main alloying elements (zinc and tin). By plotting the concentrations of these two elements (zinc and tin) against each other for all the sculptures studied, three clusters of data become apparent: (A) high-zinc brass; (B) low-zinc brass; (C) tin bronze. These clusters correlate to specific foundries, which used specific casting methods (sand or lost wax) that were influenced by individual preferences and technical skills of the foundry masters. For instance, the high-zinc brass alloys (with the highest levels of tin and zinc and the lowest melting temperature) correspond to most of the Picasso sculptures, correlate with the Valsuani foundry, and are associated with the most recent sculptures (post-WWII) and with the lost-wax casting method. By expanding the ICP-OES database of objects studied, these material correlations may become useful for identifying, dating, or possibly even authenticating other bronzes that do not bear foundry marks. Figure.

  13. Friction Stir Processing Parameters and Property Distributions in Cast Nickel Aluminum Bronze

    National Research Council Canada - National Science Library

    Rosemark, Brian P

    2006-01-01

    Cast nickel-aluminum bronze (NAB) alloy is specified for many marine applications, including ship propellers, due to its excellent corrosion-resistance combined with acceptable mechanical properties...

  14. Patina in the construction of the poetic bronze image: science of materials, art and philosophy

    National Research Council Canada - National Science Library

    Silva, Claudia; Vélez, Gabriel; Colorado, Henry A

    2017-01-01

    Bronze has been positioned as the medium par excellence for sculptural production bearing the aesthetic, symbolic and poetic values that have propitiated the construction of a metallurgical archetype...

  15. Astvrorvm Regnvm. Proyecto marco de desarrollo territorial

    OpenAIRE

    Sánchez Ontiyuelo, Miguel Ángel

    2011-01-01

    Astvrorvm Regnvm es un Proyecto Marco de Desarrollo Territorial que parte de la consideración del Patrimonio histórico y artístico altomedieval propio del Reino de Asturias (Ss. VIII-X), en sus diferentes manifestaciones, como activo para el desarrollo, promoción y generación de riqueza social y económica. Para ello tomamos una óptica de gestión territorial, con el objetivo de integrar e interrelacionar sinergias de espacios fragmentados, dispares en sus caracteres geográficos, pero íntimamen...

  16. Evaluation of Non-Timber forest Products (NTFPs) In Bronze Casting ...

    African Journals Online (AJOL)

    Evaluation of NTFPs input in bronze casting at Igun Street in Benin City was carried out with the use of measurement of inputs and questionnaires. Fifty percent sampling intensity was used to obtain 42 from the total population of 84 Bronze Casters. Data were analyzed with the use of descriptive statistics of frequency, ...

  17. Evaluation of Non-Timber forest Products (NTFPs) In Bronze Casting ...

    African Journals Online (AJOL)

    Michael Horsfall

    Evaluation of Non-Timber forest Products (NTFPs) In Bronze Casting Enterprise at. Egun Street, Benin City, Edo state. *KALU, C; AIGBOBO, E N. Department of Forestry and Wildlife, Faculty of Agriculture, University of Benin, Benin City. ABSTRACT: Evaluation of NTFPs input in bronze casting at Igun Street in Benin City was ...

  18. The Origin and Development of the Guild of Bronze Casters of Benin ...

    African Journals Online (AJOL)

    The guild of bronze casters was the most important guild that existed in the kingdom partly because of its function of preserving the history of the kingdom in bronze for posterity sake. A role it continued to play until the late 19th century when Benin kingdom was invaded. The outcome of the invasion was the fizzling out of the ...

  19. Metallography and microstructure interpretation of some archaeological tin bronze vessels from Iran

    Energy Technology Data Exchange (ETDEWEB)

    Oudbashi, Omid, E-mail: o.oudbashi@aui.ac.ir [Department of Conservation of Historic Properties, Faculty of Conservation, Art University of Isfahan, Hakim Nezami Street, Sangtarashha Alley, P.O. Box 1744, Isfahan (Iran, Islamic Republic of); Davami, Parviz, E-mail: pdavami@razi-foundation.com [Faculty of Material Science and Engineering, Sharif University of Technology/Razi Applied Science Foundation, No. 27, Fernan St., Shahid Ghasem Asghari Blvd., km 21 of Karadj Makhsous Road, Tehran (Iran, Islamic Republic of)

    2014-11-15

    Archaeological excavations in western Iran have recently revealed a significant Luristan Bronzes collection from Sangtarashan archaeological site. The site and its bronze collection are dated to Iron Age II/III of western Iran (10th–7th century BC) according to archaeological research. Alloy composition, microstructure and manufacturing technique of some sheet metal vessels are determined to reveal metallurgical processes in western Iran in the first millennium BC. Experimental analyses were carried out using Scanning Electron Microscopy–Energy Dispersive X-ray Spectroscopy and Optical Microscopy/Metallography methods. The results allowed reconstructing the manufacturing process of bronze vessels in Luristan. It proved that the samples have been manufactured with a binary copper–tin alloy with a variable tin content that may relates to the application of an uncontrolled procedure to make bronze alloy (e.g. co-smelting or cementation). The presence of elongated copper sulphide inclusions showed probable use of copper sulphide ores for metal production and smelting. Based on metallographic studies, a cycle of cold working and annealing was used to shape the bronze vessels. - Highlights: • Sangtarashan vessels are made by variable Cu-Sn alloys with some impurities. • Various compositions occurred due to applying uncontrolled smelting methods. • The microstructure represents thermo-mechanical process to shape bronze vessels. • In one case, the annealing didn’t remove the eutectoid remaining from casting. • The characteristics of the bronzes are similar to other Iron Age Luristan Bronzes.

  20. ISOTOPES, PLANTS, AND RESERVOIR EFFECTS : CASE STUDY FROM THE CASPIAN STEPPE BRONZE AGE

    NARCIS (Netherlands)

    Shishlina, N.; Zazovskaya, E.; van der Plicht, J.; Sevastyanov, V.; Boaretto, E.; Rebollo Franco, N.R.

    2012-01-01

    Bronze Age human and animal bone collagen from several steppe Bronze Age cultures (i.e. Early Catacomb, East and West Manych Catacomb, and Lola cultures) shows large variations in delta C-13 and delta N-15 values. In general, we observed that the older the sample, the lower the delta C-13 and delta

  1. Excerpt from "IRL (In Real Life: The Bronze Documentary Project" [interview

    Directory of Open Access Journals (Sweden)

    Stephanie Tuszynski

    2011-03-01

    Full Text Available Excerpt from "IRL (In Real Life: The Bronze Documentary Project". One of the first feature-length documentary films to take on the subject of online relationships, "IRL (In Real Life" chronicles the life, death, and afterlife of an online community called The Bronze, made up of fans from the official Web site for Buffy, the Vampire Slayer.

  2. Bronze age settlement in churchyard of Gradac monastery

    Directory of Open Access Journals (Sweden)

    Peković Mirko

    2009-01-01

    Full Text Available During 2005 and 2008, a team from Republic Cultural Heritage Preservation Institute carried out preservative, sondage, archaeological and revision exploration of the Church of Holy Virgin in Gradac monastery. The 2005 exploration aim was to uncover geomorphology and characteristics of soil and its moisture penetration, to make insight in condition of ground zones, uncovering of attached structures and archaeological material, obtaining stratigraphic data, all in purpose of obtaining data for making the Main Project for preserving the Church of Holy Virgin from moisture. The first phase of work started in 2008, and it included work on western, north-western and south-western part of the church. During these explorations, 9 sondages were opened and a drainage pit, in total area of 130 m² and total depth of 3 m. Beside medieval cultural layer and medieval necropolis, a prehistoric layer of 0.5-0.6 m depth was found which was documented with four residential horizons as well with other belonging archaeological material originated in period of the end of Early Bronze Age and Middle Bronze Age. Pottery from older prehistoric layer in Gradac, which was documented with two residential horizons, mainly consists of fragments of pottery made of weaker, refined clay, with smooth surfaces and with range of colour from brownish to dark grey. These are fragments of dishes and larger spherical pots with two vertical handles on wider part of body. Some fragments are decorated with wartlike bulges or recesses made with fingers. From fine pottery, there are pear-shaped amphorae with thin sides, bowls and cups. Beside pottery, in this layer there were also few fragments of different shapes made of Rozhnac stone, flints and quartzite, part of stone axe with perforation whose upper part is shaped into secant and two fragmented millstones made of quartzlathyte, a mineral found in mountain Golija (Pl. I-III. Analogies to this pottery are found in sites in Milića Brdo

  3. Dal "San Marco" al "Vega". (English Title: From "San Marco" to Vega)

    Science.gov (United States)

    Savi, E.

    2017-10-01

    Apart from the two superpowers, among the other countries Italy has had an important role in astronautics. The roots of Italian astronautics' history runs deep in the hottest years of the Cold War, and it had its first remarkable achievement in the San Marco project..after years of advanced technologies testing, they achieved European cooperation and built VEGA, the current Arianespace light launcher.

  4. Effect of degassing addition on the solidification segregation of nickel aluminum bronze

    Science.gov (United States)

    Syazwan, F.; Kavinjr, M.; Maghribi, S.; Ashraf, N.; Hadi, A.; Shayfull, Z.; Rashidi, M. M.

    2017-09-01

    The effect of degassing agent addition on the solidification segregation of Nickel Aluminum Bronze was investigated. The complex relationship between the development of the solidification microstructures and buildup of microsegregation in Nickel Aluminum Bronze was obtained by using microstructure analysis and EDS analysis. This experiment describes the characterization of microsegregation in Nickel Aluminum Bronze which was made using point to count microanalysis along the microstructure. With this method, the differences of elements distribution in alloys solidified in the microstructure were clearly evidenced. The results show a microstructure directly affected by segregation of elements in Nickel Aluminum Bronze matrix. There is segregation of elements in the Late To Freeze (LTF) region after solidification from melting. As for degassing treatment, higher degassing addition on the Nickel Aluminum Bronze increased the elements segregation.

  5. Chisels in the italian Bronze Age: technological and typological aspects

    Directory of Open Access Journals (Sweden)

    Speciale, Claudia

    2010-12-01

    Full Text Available Bronze chisels are tools used “à percussion posée”; this means they need a minimum length and some functional parts (tang, body, blade; they could have a handle of perishable material and they were used with a hammer to work wood, bronze and other materials. Chisels can be classified following their functional parts; the first element is the shape (rod or socketed chisel; the second one is body section; the third one is tang section. Chronology and distribution of every type were identified to obtain a general view of this class of tools during the Italian Bronze Age.

    Los cinceles de bronce son herramientas que se utilizan en percusión apoyada (à percussion posée, por consiguiente, necesitan una longitud mínima y algunas partes funcionales (empuñadura, cuerpo, hoja; podrían tener un mango de material perecedero. Se utilizan con un martillo en el labrado de la madera, del bronce y de otros materiales. Los cinceles se pueden clasificar de acuerdo con los siguientes elementos funcionales: el primero es la forma (cincel de varilla o de cubo; el segundo es la sección del cuerpo; el tercero es la sección de la empuñadura. La cronología y la distribución de cada tipo se identificaron para obtener una visión general de esta clase de instrumentos durante la Edad del Bronce en Italia.

  6. Prevention of Dealloying in Manganese Aluminium Bronze Propeller: Part II

    Directory of Open Access Journals (Sweden)

    Napachat Tareelap

    2014-03-01

    Full Text Available Due to the failure of manganese aluminium bronze (MAB propeller caused by dealloying corrosion as described in Part I [1], this work aims to study the prevention of dealloying corrosion using aluminium and zinc sacrificial anodes. The results indicated that both of the sacrificial anodes could prevent the propeller from dealloying. Moreover, the dealloying in seawater was less than that found in brackish water. It was possible that hydroxide ions, from cathodic reaction, reacted with calcium in seawater to form calcium carbonate film protecting the propeller from corrosion.

  7. Analysis of selective laser cleaning of patina on bronze coins

    Science.gov (United States)

    Buccolieri, G.; Nassisi, V.; Torrisi, L.; Buccolieri, A.; Castellano, A.; Di Giulio, M.; Giuffreda, E.; Delle Side, D.; Velardi, L.

    2014-04-01

    The patina, is the result of a large number of chemical, electrochemical and physical processes which occur spontaneously during interaction of metal surfaces with the environment. In this work we want to analyze and remove the patina in artefacts, exposed to atmosphere for various decades. Here, experimental results about the laser cleaning of bronze coins by KrF (248 nm) and Nd:YAG (532 nm) lasers are reported. Both laser wavelengths were efficient to reduce the chlorine concentration on the surface of the coins more than 80 %, as demonstrated by Energy Dispersive X-Ray Fluorescence analyses.

  8. Environmental Roots of the Late Bronze Age Crisis

    Science.gov (United States)

    Kaniewski, David; Van Campo, Elise; Guiot, Joël; Le Burel, Sabine; Otto, Thierry; Baeteman, Cecile

    2013-01-01

    The Late Bronze Age world of the Eastern Mediterranean, a rich linkage of Aegean, Egyptian, Syro-Palestinian, and Hittite civilizations, collapsed famously 3200 years ago and has remained one of the mysteries of the ancient world since the event’s retrieval began in the late 19th century AD/CE. Iconic Egyptian bas-reliefs and graphic hieroglyphic and cuneiform texts portray the proximate cause of the collapse as the invasions of the “Peoples-of-the-Sea” at the Nile Delta, the Turkish coast, and down into the heartlands of Syria and Palestine where armies clashed, famine-ravaged cities abandoned, and countrysides depopulated. Here we report palaeoclimate data from Cyprus for the Late Bronze Age crisis, alongside a radiocarbon-based chronology integrating both archaeological and palaeoclimate proxies, which reveal the effects of abrupt climate change-driven famine and causal linkage with the Sea People invasions in Cyprus and Syria. The statistical analysis of proximate and ultimate features of the sequential collapse reveals the relationships of climate-driven famine, sea-borne-invasion, region-wide warfare, and politico-economic collapse, in whose wake new societies and new ideologies were created. PMID:23967146

  9. The Umm Al Binni Structure and Bronze Age Catastrophes

    Science.gov (United States)

    Hamacher, Duane W.

    Archaeological excavations of sites dating from 2200 BCE and 1200 BCE in the Middle East, Asia Minor, and southeast Europe provide evidence that a large scale disaster affected Bronze Age civilizations. There are numerous debates as to whether this was caused by warfare, a large-scale natural disaster, or some other factor. In 2001, Sharad Master used satellite images to discover a possible Holocene impact structure in the Al 'Amarah marshes of southern Iraq, known as Umm al Binni lake. With an estimated age of impact, I show that although destructive forces would have damaged Sumerian cities within a few hundred km of the coast, it is unlikely that this single impact would have caused the large-scale destruction seen over the larger region. The impact origin of the structure is unconfirmed and any connection to Bronze Age catastrophes remains speculative. Errata: Table 4 provides a list of impact sites, three of which are associated with nickel-iron impactors and therefore cannot be from a "fragmented comet".

  10. Environmental roots of the late bronze age crisis.

    Science.gov (United States)

    Kaniewski, David; Van Campo, Elise; Guiot, Joël; Le Burel, Sabine; Otto, Thierry; Baeteman, Cecile

    2013-01-01

    The Late Bronze Age world of the Eastern Mediterranean, a rich linkage of Aegean, Egyptian, Syro-Palestinian, and Hittite civilizations, collapsed famously 3200 years ago and has remained one of the mysteries of the ancient world since the event's retrieval began in the late 19(th) century AD/CE. Iconic Egyptian bas-reliefs and graphic hieroglyphic and cuneiform texts portray the proximate cause of the collapse as the invasions of the "Peoples-of-the-Sea" at the Nile Delta, the Turkish coast, and down into the heartlands of Syria and Palestine where armies clashed, famine-ravaged cities abandoned, and countrysides depopulated. Here we report palaeoclimate data from Cyprus for the Late Bronze Age crisis, alongside a radiocarbon-based chronology integrating both archaeological and palaeoclimate proxies, which reveal the effects of abrupt climate change-driven famine and causal linkage with the Sea People invasions in Cyprus and Syria. The statistical analysis of proximate and ultimate features of the sequential collapse reveals the relationships of climate-driven famine, sea-borne-invasion, region-wide warfare, and politico-economic collapse, in whose wake new societies and new ideologies were created.

  11. The bronze signum from Timacum Maius and its cultic attribution

    Directory of Open Access Journals (Sweden)

    Petrović Vladimir

    2016-01-01

    Full Text Available The bronze signum discussed in this paper was discovered by archaeological ex­cavation on the site of Timacum Maius in 2010. Found in the area of a luxurious Roman-period building, the artefact shows a tapering body with a central conical socket similar to a spearhead socket. It is one of the twenty-three known signa of the so-called classical-type. Most of them were found in the context of the cult of Jupiter Dolichenus, and we also presume the cultic purpose of the bronze signum from Timacum Maius. A similar find comes from Jupiter Dolichenus’ shrine in Egeta on the Danube limes with an inscription that connects it directly with the Dolichenian cult, and with the First Cohort of Cretans (Cohors I Cretum, the unit which had previously been stationed at Timacus Maius. The signum from Timacum Maius is most likely also connected with the cult of Jupiter Dolichenus and chronologically belongs to a period which is much earlier than the Severan age. [Projekat Ministarstva nauke Republike Srbije, 177012: Society, spiritual and material culture and communications in prehistory and early history of the Balkans

  12. Discovering Marco Polo: A Resource Guide for Teachers.

    Science.gov (United States)

    Stanford Univ., CA. Stanford Program on International and Cross Cultural Education.

    This guide is designed for teachers who wish to teach about Marco Polo and his travels to China during the 13th century. The guide was originally developed for use with a television series about Marco Polo; it can successfully be used independent of the series, however. A prologue gives the reader a basic introduction to what is known of the life…

  13. Palaeoethnobotanical Data from the High Mountainous Early Bronze Age Settlement of Tsaghkasar-1 (Mt. Aragats, Armenia

    Directory of Open Access Journals (Sweden)

    Roman Hovsepyan

    2011-09-01

    Full Text Available Palaeoethnobotanical investigations suggest that at least part of the Early Bronze Age population of Tsaghkasar was settled and practiced agriculture in the high mountainous zone. People there appear to have cultivated hexa‐ and tetraploid wheats (probably bread wheat and emmer and barley (possibly hulled. Bronze Age agriculture in the Southern Caucasus differs from earlier and later period when cultivation of pulses, oil‐producing plants, and other plants was common. This emphasis on the cultivation and use of certain cereal grains at Early Bronze sites such as Tsaghkasar can tentatively be added to a constellation of practices associated with the Kura‐Araxes culture in the South Caucasus.

  14. History of a Bronze Age tell and its environment

    Science.gov (United States)

    Kovács, Gabriella; Füleky, György; Vicze, Magdolna

    2016-04-01

    Százhalombatta-Földvár is the most excessively researched Bronze Age tell site in Hungary. Parallel to the investigation of the settlement structure and activity patterns the changes of the landscape and the effect of human alteration is also studied. Significant changes of the landscape can be detected from the Bronze Age until the recent natural and cultural heritage protection of the area. Archaeological, soil analytical and thin section soil micromorphological methods are used to reconstruct the past 4000 years of the tell and its immediate surroundings. Prior to the Bronze Age the area was covered by forest vegetation, so the initial settling could only be realised after deforestation (2000 BC). The result of the soil corings and the prepared soil thin sections are solid proves of this action. It also became evident that at some areas - so far it seems that at locales where house floors were laid for the very first time - even the topsoil was removed so intensively that only the B horizon of the relict forest soil can be found. This observation needs to be further tested outside the habitation area to define the horizontal extension of the forest clearance and the topsoil removal. The northern side of the settlement is bordered by a natural erosion gully. At 2000 BC it was just a natural depression, but by 1500 BC it was deepened to serve as a fortification ditch. Around 1200 BC the ditch started to be filled in and by 1000 BC it was refilled to such an extent that its surface was utilised again. At about 600 BC (Late Iron Age) a smaller inner rampart was erected on the southern side of the ditch for inner separation. Not much is known about the Roman period of this area (200 AD) but the remnants of a watchtower indicate their presence. During the 18th century AD the area was used for grape cultivation and later for hobby gardens up until the protection of the area in the late 20th century. Since then species of the original vegetation started to grow back

  15. LAMQS analysis applied to ancient Egyptian bronze coins

    Energy Technology Data Exchange (ETDEWEB)

    Torrisi, L., E-mail: lorenzo.torrisi@unime.i [Dipartimento di Fisica dell' Universita di Messina, Salita Sperone, 31, 98166 Messina (Italy); Caridi, F.; Giuffrida, L.; Torrisi, A. [Dipartimento di Fisica dell' Universita di Messina, Salita Sperone, 31, 98166 Messina (Italy); Mondio, G.; Serafino, T. [Dipartimento di Fisica della Materia ed Ingegneria Elettronica dell' Universita di Messina, Salita Sperone, 31, 98166 Messina (Italy); Caltabiano, M.; Castrizio, E.D. [Dipartimento di Lettere e Filosofia dell' Universita di Messina, Polo Universitario dell' Annunziata, 98168 Messina (Italy); Paniz, E.; Salici, A. [Carabinieri, Reparto Investigazioni Scientifiche, S.S. 114, Km. 6, 400 Tremestieri, Messina (Italy)

    2010-05-15

    Some Egyptian bronze coins, dated VI-VII sec A.D. are analyzed through different physical techniques in order to compare their composition and morphology and to identify their origin and the type of manufacture. The investigations have been performed by using micro-invasive analysis, such as Laser Ablation and Mass Quadrupole Spectrometry (LAMQS), X-ray Fluorescence (XRF), Laser Induced Breakdown Spectroscopy (LIBS), Electronic (SEM) and Optical Microscopy, Surface Profile Analysis (SPA) and density measurements. Results indicate that the coins have a similar bulk composition but significant differences have been evidenced due to different constituents of the patina, bulk alloy composition, isotopic ratios, density and surface morphology. The results are in agreement with the archaeological expectations, indicating that the coins have been produced in two different Egypt sites: Alexandria and Antinoupolis. A group of fake coins produced in Alexandria in the same historical period is also identified.

  16. Influence Cr on Crystallization and the Phase Transformations of the Bronze BA1044

    Directory of Open Access Journals (Sweden)

    B. P. Pisarek

    2007-07-01

    Full Text Available The investigations were introduced in the paper, method of thermal and derivative analysis (TDA, the process of crystallization and phase transformation in the solid state of the aluminium bronze CuA110Fe4Ni4 (BA1044 and with the addition 0.3% Cr. Two intermetallic phase were identified in the microstructure of the bronze BA1044: κFel - rich in Fe and Cu and κFe2 - rich in Fe, and in the microstructure of the bronze BA1044+0.3 % Cr only one phase κFel - rich in Fe, Cu and Cr. The presence of chrome in the bronze BA1044 reduce size the primary crystals of the phase β, reduces the dynamics of the processes of thermal phase transformation in the solid state and lengthens the time their of duration.

  17. Pantani di Marco Martinelli: una narrazione polifonica

    Directory of Open Access Journals (Sweden)

    Franco Nasi

    2014-05-01

    Full Text Available In questo articolo si analizza il testo drammaturgico Pantani di Marco Martinelli, una veglia epica teatrale di uno dei più noti eroi dello sport italiano degli ultimi anni. Il dramma rilegge anche la storia di Pantani e ricostruisce gli strani avvenimenti che portarono alla sospensione, alla estromissione del ciclista dal Giro d’Italia nel 1999, e in seguito alla sua profonda crisi psicologica e tragica morte in solitudine in un hotel, a soli 34 anni. Oltre alle modalità proprie della veglia rituale, il dramma utilizza anche i metodi del processo giudiziario, e offre testimonianze dettagliate che conducono a una riflessione critica sulla società italiana negli anni del potere politico di Berlusconi e della sua filosofia del consumismo. I tre diversi generi della retorica classica (epidittico, giudiziario e deliberativo si mescolano in questa complessa tessitura teatrale. Coniugando informazioni (processo e rito (veglia, Martinelli riesce a fondere la tragedia greca (forma mimetica e corale e il moderno teatro di narrazione (forma diegetica monologante. Combinando assieme scene intensamente drammatiche, ricordi di imprese sportive epiche, passaggi giocosi e parodici, e giustapponendo vari stili e registri (giornalistico, lirico, parodico, elegiaco, Martinelli crea momenti di forte “straniamento” e sorpresa, e rende particolarmente efficace il rito funebre, la ricostruzione storica della tragica vicenda di Pantani e la critica all’ideologia che ha dominato l’Italia negli anni di Berlusconi. 

  18. Trajetória da política de atenção básica à saúde no Distrito Federal, Brasil (1960 a 2007: análise a partir do marco teórico do neo-institucionalismo histórico A history of primary health care policy in the Federal District, Brazil (1960-2007: an analysis based on the theoretical framework of historical neo-institutionalism

    Directory of Open Access Journals (Sweden)

    Leila Bernardo Donato Göttems

    2009-06-01

    Full Text Available Este artigo analisa a trajetória da política de atenção básica à saúde no Distrito Federal, Brasil, a partir do marco teórico do neo-institucionalismo histórico, identificando as conformações e as tendências predominantes nas gestões da Secretaria de Estado da Saúde (SES-DF no período de 1960 a 2007. O estudo sinaliza que a política de saúde do Distrito Federal apresenta características de dependência da trajetória dos planos de saúde originais na definição de prioridades e metas, bem como na implementação do sistema de saúde. Essa influência, agregada à centralização dos processos decisórios e à limitada participação política, pode contribuir para situar a atenção básica como acessória ao atendimento hospitalar, destituindo-a do seu potencial de produzir mudança no modelo assistencial.This article analyzes the history of primary health care policy in the Federal District, Brazil, based on the theoretical framework of historical neo-institutionalism, identifying the predominant configurations and trends in the various administrations of the State Health Secretariat (SES-DF from 1960 to 2007. The study indicates that the characteristics of the Federal District's health policy are dependent on the history of the original health system plans for setting priorities and goals, as well as for the health system's implementation. This influence, in addition to the centralization of decision-making processes and limited political participation, can contribute to making primary care ancillary to hospital care, thus jeopardizing its potential to produce change in the health care model.

  19. Sol-gel synthesis and XPS study of vanadium-hydroquinone oxide bronze films

    Energy Technology Data Exchange (ETDEWEB)

    Bondarenka, V. [Semiconductor Physics Institute, A. Gostauto 11, 01108 Vilnius (Lithuania); Vilnius Pedagogical University, Studentu 39, 08106 Vilnius (Lithuania); Tvardauskas, H.; Grebinskij, S.; Senulis, M.; Pasiskevicius, A. [Semiconductor Physics Institute, A. Gostauto 11, 01108 Vilnius (Lithuania); Volkov, V.; Zakharova, G. [Institute of Solid State Chemistry, Pervomaiskaia 91, 620219 Yekaterinburg (Russian Federation)

    2009-12-15

    A vanadium - hydroquinone oxide bronze has been synthesized by using a sol gel technology. The V{sub 2}O{sub 5} powder, hydrogen peroxide, and hydroquinone C{sub 6}H{sub 4}(OH){sub 2} were used as the starting materials to produce the bronze. At first the vanadium gel was made by the dissolving of vanadium pentoxide powder in hydrogen peroxide at 273 K. Then the solution was heated up to 350 K for the dissociation of peroxide complexes. An aqueous solution of hydroquinone was mixed with the formed gel in molar ratio 0.33:1. In this way the V{sub 2}O{sub 5{+-}}{sub {delta}}.nH{sub 2}O/HQ (HQ-hydroquinone) gel was synthesized. These gels are applied on the Ni pad and dried in an air (wet gel synthesis) or heated up to 580 K in air for 1 h for the water removal from gel (bronze production). The wet gel, as well as a bronze, was investigated by means of XPS method. Analysis of V-O region of XPS spectra shows that vanadium in both cases (wet gel and bronze) is in stable V{sup 5+} state. Oxygen in wet gel can be associated with V ions, hydroxide group and water. In bronze oxygen is connected with V and hydrogen (hydroxide). (copyright 2009 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

  20. Characterisation of Late Bronze Age large size shield nails by EDXRF, micro-EDXRF and X-ray digital radiography

    Energy Technology Data Exchange (ETDEWEB)

    Figueiredo, E., E-mail: elin@itn.pt [Instituto Tecnologico e Nuclear, Estrada Nacional 10, 2686-953 Sacavem (Portugal); CENIMAT/I3N, Departamento de Ciencia dos Materiais, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, 2829-516 Monte de Caparica (Portugal); Departamento de Conservacao e Restauro, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, 2829-516 Monte de Caparica (Portugal); Araujo, M.F. [Instituto Tecnologico e Nuclear, Estrada Nacional 10, 2686-953 Sacavem (Portugal); Silva, R.J.C. [CENIMAT/I3N, Departamento de Ciencia dos Materiais, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, 2829-516 Monte de Caparica (Portugal); Senna-Martinez, J.C. [Centro de Arqueologia (Uniarq), Faculdade de Letras, Universidade de Lisboa, 1600-214 Lisboa (Portugal); Ines Vaz, J.L. [Departamento de Letras, Universidade Catolica, Estrada da Circunvalacao, 3504-505 Viseu (Portugal)

    2011-09-15

    In the present study six exceptional large size metallic nails, a dagger and a sickle from the Late Bronze Age archaeological site of Figueiredo das Donas (Central Portugal) have been analysed by EDXRF, micro-EDXRF and X-ray digital radiography for the study of material composition and technology of fabrication. The combination of these analytical and examination techniques showed that all artefacts are made of bronze with As, Sb and Pb impurities, and that the nails were most likely manufactured using the casting-on technique. These results reinforce the use of binary bronze by Late Bronze Age in the region, and the incorporation of new fabrication technologies that resulted from ancient spheres of interaction. - Highlights: > EDXRF, micro-EDXRF and X-ray digital radiography in cultural heritage studies. > Archaeometallurgical study of a Late Bronze Age artefact collection from Portugal. > Practise of a specific and traditional bronze metallurgy. > Appearance of technological innovations as the casting-on technique.

  1. Kas doktorikooli lõpetajatest saavad doktorid? / Marco Kirm

    Index Scriptorium Estoniae

    Kirm, Marco, 1965-

    2008-01-01

    Materjaliteaduse ja materjalide tehnoloogia doktorikool on TÜ Füüsika-keemiateaduskonna ja Füüsika Instituudi juurde loodud institutsioon. Vastab Tartu Ülikooli Füüsika Instituudi teadusdirektor Marco Kirm

  2. Final Critical Habitat for the San Marcos salamander (Eurycea nana)

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — To provide the user with a general idea of areas where final critical habitat for San Marcos salamander (Eurycea nana) occur based on the description provided in the...

  3. Final Critical Habitat for the San Marcos gambusia (Gambusia georgei)

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — To provide the user with a general idea of areas where final critical habitat for San Marcos gambusia (Gambusia georgei) occur based on the description provided in...

  4. Necropolis on Bor lake: New reports on Bronze age burial

    Directory of Open Access Journals (Sweden)

    Kapuran Aleksandar

    2011-01-01

    Full Text Available This article deals with the social and anthropological aspects of burial rituals during the Middle Bronze Age in Timočka Krajina. Decades of systematic research of necropolises and reconnaissance in the basin of the Crni Timok proved an increase in number of sites around ore - rich areas of the east Kučaj mountains as well as around Romuliana site and the fertile valleys of Džanovo polje (Map. 1. The quantitative increase in settlements was reflected by the emergence of large necropolises, only three of which have been systematically explored; those in Trnjani, Magura and Bor Lake (Fig. 1; Plan 1. Analysis of geographical features of many settlements and their position in relation to natural resources helped define two communities, one of which carried out mining and metallurgical activities, while the other group engaged in the production of food. Both groups lived in the immediate vicinity and mutual dependence, functioning within a developed market for copper production. During the exploration of the necropolis near Bor Lake in 1997, the remains of burnt skeletons were collected from burial structures 2/97 and 13/97 (Fig. 2; Plans 2 and 3. Anthropological analysis of the cremated remains of the deceased showed that high temperatures were used during the cremation process, which we assume could have only been achieved in metallurgical furnaces. This is confirmed by the fact that the skeletal fragments contain traces of melted metal, as well as finds of bronze slag inside urns and grave structures in the necropolis in Trnjani (Figs. 3 and 4; Tables 1-4. Burial ritual of this kind was not proved by systematic archaeological research of necropolises in the basin of Crni Timok, although anthropological data collected from necropolises linked to metallurgical settlements may indicate some guidelines in the ritual cremation of prominent members of these communities. [Projekat Ministarstva nauke Republike Srbije, br. 177020: Arheologija Srbije

  5. Laser recleaning of a Bronze Age prehistoric dolmen

    Science.gov (United States)

    Daurelio, G.; Andriani, S. E.; Catalano, I. M.; Albanese, A.

    2007-05-01

    Dolmen La Chianca (XVI-XV century B.C.) is one of the most important megalithic buildings in Europe for its state of conservation and for the great number of findings that were discovered there (human remains, ceramic vases, pendants, bronze objects, obsidian and silica blades etc.). The building was defaced by many writings made using different markers (permanent black, correction ink pen, ballpoint pen, pencil, water-based coloured markers). The writings were removed by using a Nd-YAG laser source (λ 1064 nm with pulse duration; t 8 ns ; f 2 to 20 Hz ; energy per impulse up to 280 mJ). Degradation mapping and laser cleaning with photographs, taken before, during and after the process in situ, were carried out, then different laser parameters and techniques were used to remove different ink types. A first laser cleaning was operated on the same building in 1999 by Daurelio, but vandals defaced newly the monument, then a new restoration became necessary.

  6. Tracing the dynamic life story of a Bronze Age Female

    Science.gov (United States)

    Margarita Frei, Karin; Mannering, Ulla; Kristiansen, Kristian; Allentoft, Morten E.; Wilson, Andrew S.; Skals, Irene; Tridico, Silvana; Louise Nosch, Marie; Willerslev, Eske; Clarke, Leon; Frei, Robert

    2015-05-01

    Ancient human mobility at the individual level is conventionally studied by the diverse application of suitable techniques (e.g. aDNA, radiogenic strontium isotopes, as well as oxygen and lead isotopes) to either hard and/or soft tissues. However, the limited preservation of coexisting hard and soft human tissues hampers the possibilities of investigating high-resolution diachronic mobility periods in the life of a single individual. Here, we present the results of a multidisciplinary study of an exceptionally well preserved circa 3.400-year old Danish Bronze Age female find, known as the Egtved Girl. We applied biomolecular, biochemical and geochemical analyses to reconstruct her mobility and diet. We demonstrate that she originated from a place outside present day Denmark (the island of Bornholm excluded), and that she travelled back and forth over large distances during the final months of her life, while consuming a terrestrial diet with intervals of reduced protein intake. We also provide evidence that all her garments were made of non-locally produced wool. Our study advocates the huge potential of combining biomolecular and biogeochemical provenance tracer analyses to hard and soft tissues of a single ancient individual for the reconstruction of high-resolution human mobility.

  7. Bronze baby syndrome and the risk of kernicterus.

    Science.gov (United States)

    Bertini, Giovanna; Dani, Carlo; Fonda, Claudio; Zorzi, Carlo; Rubaltelli, Firmino F

    2005-07-01

    The problem of kernicterus in infants with bronze baby syndrome (BBS) has been reviewed on the basis of cases reported in the literature. In addition, a new case concerning an infant with severe Rh haemolytic disease, who presented with BBS and who has developed neurological manifestations of kernicterus with magnetic resonance images showing basal ganglia abnormalities, is presented. In this patient, the total serum bilirubin (TSB) concentration ranged from 18.0 to 22.8 mg/dl (306 to 388 micromol/l) and the bilirubin/albumin (B/A) ratio was 6.0 (mg/g) (6.8 is the value at which an exchange transfusion should be considered). The case presented is important due to the fact that kernicterus appeared after an exchange transfusion was performed when the TSB level reached 22.8 mg/dl (388 micromol/l) on 6th day of life while the haematocrit was 30%. From this case and from other cases reported in the literature, we must stress that, even if the level at which hyperbilirubinemia poses a threat remains undefined, BBS may constitute an additional risk of developing kernicterus. The possible strategies for implementing an approach to the management of hyperbilirubinemia (especially the haemolytic kind) in the presence of BBS may include an exchange transfusion carried out at lower TSB concentration than previously recommended or an early administration of Sn-mesoporphyrin.

  8. Draft genome of the Marco Polo Sheep (Ovis ammon polii).

    Science.gov (United States)

    Yang, Yongzhi; Wang, Yutao; Zhao, Yue; Zhang, Xiuying; Li, Ran; Chen, Lei; Zhang, Guojie; Jiang, Yu; Qiu, Qiang; Wang, Wen; Wei, Hong-Jiang; Wang, Kun

    2017-12-01

    The Marco Polo Sheep (Ovis ammon polii), a subspecies of argali (Ovis ammon) that is distributed mainly in the Pamir Mountains, provides a mammalian model to study high altitude adaptation mechanisms. Due to over-hunting and subsistence poaching, as well as competition with livestock and habitat loss, O. ammon has been categorized as an endangered species on several lists. It can have fertile offspring with sheep. Hence, a high-quality reference genome of the Marco Polo Sheep will be very helpful in conservation genetics and even in exploiting useful genes in sheep breeding. A total of 1022.43 Gb of raw reads resulting from whole-genome sequencing of a Marco Polo Sheep were generated using an Illumina HiSeq2000 platform. The final genome assembly (2.71 Gb) has an N50 contig size of 30.7 Kb and a scaffold N50 of 5.49 Mb. The repeat sequences identified account for 46.72% of the genome, and 20 336 protein-coding genes were predicted from the masked genome. Phylogenetic analysis indicated a close relationship between Marco Polo Sheep and the domesticated sheep, and the time of their divergence was approximately 2.36 million years ago. We identified 271 expanded gene families and 168 putative positively selected genes in the Marco Polo Sheep lineage. We provide the first genome sequence and gene annotation for the Marco Polo Sheep. The availability of these resources will be of value in the future conservation of this endangered large mammal, for research into high altitude adaptation mechanisms, for reconstructing the evolutionary history of the Caprinae, and for the future conservation of the Marco Polo Sheep.

  9. Dating simple flakes: Early Bronze Age flake production technology on the Middle Euphrates Steppe, Syria

    Directory of Open Access Journals (Sweden)

    Yoshihiro Nishiaki

    2014-03-01

    Full Text Available Aceramic flint scatters, comprising very crude cores or flakes and no formalised tools, are frequently found on the Middle Euphrates steppe of northern Syria. Previous studies suggest that many of them are residues of short-term activities by the nomads or shepherds of the Early Bronze Age. In order to verify this interpretation, a more precise chronological framework needs to be established for the Early Bronze Age lithic industry. This paper analyses stratified flake assemblages of the Early Bronze Age at Tell Ghanem al-Ali, a securely radiocarbon-dated settlement on the Middle Euphrates, and examines which occupation level yields assemblages most similar to those of the steppe. Results demonstrate that the lithic industry of this period underwent significant diachronic changes in terms of core reduction technology. Based on the chronological framework developed at Tell Ghanem al-Ali, the steppe assemblages in question can be assigned to different phases of the Early Bronze Age. This finding will help identify processes at the beginning of the extensive exploitation of the steppe, which is regarded as one of the most important socioeconomic changes that occurred among Early Bronze Age communities of the Middle Euphrates.

  10. Corrosion of Bronzes by Extended Wetting with Single versus Mixed Acidic Pollutants.

    Science.gov (United States)

    Gianni, Liliana; Gigante, Giovanni E; Cavallini, Mauro; Adriaens, Annemie

    2014-04-28

    The corrosion of bronzes was examined in the context of single-acid versus mixed-acid (as in urban acid rain) solutions. Two bi-component bronzes (copper with either 3% Sn or 7% Sn) that closely represent those of historic artifacts were immersed for five weeks in conditions designed to replicate those experienced by statues and ornaments in cities where rainfall and humidity constantly produce an electrolyte layer on the surfaces of bronzes. Ions, acids, and particles of pollutants can dissolve in this layer, resulting in a variety of harsh corrosion processes. The kinetics of corrosion and the properties of the resulting patinas were monitored weekly by electrochemical impedance spectroscopy and open-circuit potential measurements. The sizes and appearances of the corrosion products were monitored and used to estimate the progress of the corrosion, whose crystalline structures were visualized using scanning electron microscopy with energy dispersive spectroscopy, identified by X-ray diffraction, and characterized by spectrocolorimetry. The electrochemical measurements demonstrated that greater damage (in terms of color change and corrosion product formation) did not correspond to deficiencies in protection. The mixed-acid solution did not corrode the bronzes, as would be expected from the additive effects of the single acids. The postulated mechanisms of metal dissolution appear to be specific to a particular bronze alloy, with the tin component playing an important role.

  11. Propolis as a green corrosion inhibitor for bronze in weakly acidic solution

    Science.gov (United States)

    Varvara, Simona; Bostan, Roxana; Bobis, Otilia; Găină, Luiza; Popa, Florin; Mena, Vicente; Souto, Ricardo M.

    2017-12-01

    In the present work, the inhibitive action of natural propolis on bronze corrosion in a weakly acidic solution containing Na2SO4 and NaHCO3 at pH 5 was evaluated using multiscale electrochemical techniques, namely potentiodynamic polarization, electrochemical impedance spectroscopy and scanning vibrating electrode technique measurements. The major constituents of propolis were identified by HPLC. Surface characterization was performed by SEM-EDX and AFM analysis. Experiments were performed as a function of the propolis concentration and immersion time in the corrosive electrolyte. The obtained results showed that propolis presents good anticorrosive properties on bronze, acting as a mixed-type inhibitor, but its protective effectiveness is time-dependent. The highest inhibiting efficiency of 98.9% was obtained in the presence of 100 ppm propolis, after about 12 h of exposure to inhibitor-containing electrolyte through the stabilization of Cu2O on the bronze surface. The inhibitive properties of propolis on bronze corrosion are likely due to the adsorption of its main constituents (flavonoids and phenolic compounds), through the oxygen atoms in their functional groups and aromatic rings, which have been evidenced by FT-IR spectra. The adsorption of propolis on bronze was found to follow Langmuir adsorption isotherm.

  12. Corrosion of Bronzes by Extended Wetting with Single versus Mixed Acidic Pollutants

    Directory of Open Access Journals (Sweden)

    Liliana Gianni

    2014-04-01

    Full Text Available The corrosion of bronzes was examined in the context of single-acid versus mixed-acid (as in urban acid rain solutions. Two bi-component bronzes (copper with either 3% Sn or 7% Sn that closely represent those of historic artifacts were immersed for five weeks in conditions designed to replicate those experienced by statues and ornaments in cities where rainfall and humidity constantly produce an electrolyte layer on the surfaces of bronzes. Ions, acids, and particles of pollutants can dissolve in this layer, resulting in a variety of harsh corrosion processes. The kinetics of corrosion and the properties of the resulting patinas were monitored weekly by electrochemical impedance spectroscopy and open-circuit potential measurements. The sizes and appearances of the corrosion products were monitored and used to estimate the progress of the corrosion, whose crystalline structures were visualized using scanning electron microscopy with energy dispersive spectroscopy, identified by X-ray diffraction, and characterized by spectrocolorimetry. The electrochemical measurements demonstrated that greater damage (in terms of color change and corrosion product formation did not correspond to deficiencies in protection. The mixed-acid solution did not corrode the bronzes, as would be expected from the additive effects of the single acids. The postulated mechanisms of metal dissolution appear to be specific to a particular bronze alloy, with the tin component playing an important role.

  13. Experimental Investigation of Friction Coefficient and Wear Rate of Brass and Bronze under Lubrication Conditions

    Directory of Open Access Journals (Sweden)

    S. Senhadji

    2016-03-01

    Full Text Available The present study is conducted in order to compare the frictional and wear behaviour under mixed lubrication of two pins: bronze (CuSn9P and brass (CuZn39Pb2, sliding on a steel disc (XC42. The selection of this type of brass and bronze was made because they are not large differences in microhardness, however, have a completely different microstructure. All tests were carried out by using a pin-on-disc tribometer, with a plane contact mode and a pure sliding velocity. The results indicate that friction coefficient and the wear coefficient of brass are significantly higher in comparison to bronze for the two studied roughness (Ra = 2 and 0.15 μm. We also note that for the brass the friction is slightly affected by the roughness of the discs, and the running time is reduced. Regarding bronze, the friction passes from 0.17 for the rough disc (Ra = 2 μm to 0.02 for the smooth disc (Ra = 0.15 μm with a time of running about 2000 s; the low value of friction corresponds to the transition to a hydrodynamic regime. The analysis of the microstructure of brass shows a high shear of the surface layers, with a severe plastic deformation, which is not the case for the bronze that is not affected by observable deformations.

  14. Warm Spraying of High-Strength Ni-Al-Bronze: Cavitation Characteristics and Property Prediction

    Science.gov (United States)

    Krebs, Sebastian; Kuroda, Seiji; Katanoda, Hiroshi; Gaertner, Frank; Klassen, Thomas; Araki, Hiroshi; Frede, Simon

    2017-01-01

    Bronze materials such as Ni-Al-bronze show exceptional performances against cavitation erosion, due to their high fatigue strength and high strength. These materials are used for ship propellers, pump systems or for applications with alternating stresses. Usually, the respective parts are cast. With the aim to use resources more efficiently and to reduce costs, this study aimed to evaluate opportunities to apply bronze as a coating to critical areas of respective parts. The coatings should have least amounts of pores and non-bonded areas and any contaminations that might act as crack nuclei and contribute to material damages. Processes with low oxidation and high kinetic impacts fulfill these criteria. Especially warm spraying, a nitrogen-cooled HVOF process, with similar impact velocities as cold gas spraying but enhanced process temperature, allows for depositing high-strength Ni-Al-bronze. This study systematically simulates and evaluates the formation and performance of warm-sprayed Ni-Al-bronze coatings for different combustion pressures and nitrogen flow rates. Substrate preheating was used to improve coating adhesion for lower spray parameter sets. Furthermore, this study introduces an energy-based concept to compare spray parameter sets and to predict coating properties. Coatings with low porosities and high mechanical strengths are obtained, allowing for a cavitation resistance similar to bulk material.

  15. Of farms and fields : the Bronze Age and Iron Age settlement and Celtic field at Hijken-Hijkerveld

    NARCIS (Netherlands)

    Arnoldussen, S.; de Vries, Karen M.

    2014-01-01

    Between 1969 and 1973, excavations were undertaken at Hijken, the Netherlands. An area of 3 hectares within a cultural landscape replete with barrows and Celtic field banks was opened-up and yielded Late Neolithic graves, a Bronze Age palisade and several Middle Bronze Age houses. During the Late

  16. Building the Bronze Age : Architectural and social change on the Greek mainland during Early Helladic III, Middle Helladic and Late Helladic I

    NARCIS (Netherlands)

    Wiersma, Corien

    2014-01-01

    Communities living on the Greek Mainland during the end of the Early Bronze Age (EBA. ca. 2200-2000 BC) and the earlier Middle Bronze Age (MBA, ca. 2000-1800 BC) were thought to be relatively simple and egalitarian, while during the later MBA and early Late Bronze Age (LBA, ca. 1700-1600 BC),

  17. Highly Stable Aqueous Zinc-ion Storage Using Layered Calcium Vanadium Oxide Bronze Cathode

    KAUST Repository

    Xia, Chuan

    2018-02-12

    Cost-effective aqueous rechargeable batteries are attractive alternatives to non-aqueous cells for stationary grid energy storage. Among different aqueous cells, zinc-ion batteries (ZIBs), based on Zn2+ intercalation chemistry, stand out as they can employ high-capacity Zn metal as anode material. Herein, we report a layered calcium vanadium oxide bronze as cathode material for aqueous Zn batteries. For the storage of Zn2+ ions in aqueous electrolyte, we demonstrate that calcium based bronze structure can deliver a high capacity of 340 mAh g-1 at 0.2 C, good rate capability and very long cycling life (96% retention after 3000 cycles at 80 C). Further, we investigate the Zn2+ storage mechanism, and the corresponding electrochemical kinetics in this bronze cathode. Finally, we show that our Zn cell delivers an energy density of 267 Wh kg-1 at a power density of 53.4 W kg-1.

  18. Boiling heat transfer on single phosphor bronze and copper mesh microstructures

    Directory of Open Access Journals (Sweden)

    Orman Łukasz J.

    2014-03-01

    Full Text Available The paper presents experimental results of boiling heat transfer of distilled water and ethyl alcohol on surfaces covered with single layers of wire mesh structures made of phosphor bronze and copper. For each material two kinds of structures have been considered (higher and lower in order to determine the impact of the height of the structure on boiling heat transfer. The wire diameter of the copper meshes was 0,25 mm and 0,32 mm, while of the bronze meshes: 0,20 mm and 0,25 mm. The structures had the same mesh aperture (distance between the wires – 0,50 mm for copper and 0,40 for bronze but different wire diameter and, consequently, different height of the layers. The tests have been performed under ambient pressure in the pool boiling mode. The obtained results indicate a visible impact of the layer height on the boiling heat transfer performance of the analysed microstructures.

  19. DEGRADATION WORKS OF MONUMENTAL ART CAST BRONZE UNDER THE INFLUENCE OF ENVIRONMENTAL FACTORS

    Directory of Open Access Journals (Sweden)

    Delia NICA-BADEA

    2012-11-01

    Full Text Available Intensive pollution, combined with the lack of conservation of monuments exposed to these environments make the main cause of deterioration of cultural objects to atmospheric corrosion metal. This paper proposes a study of the main factors leading to degradation Bronze alloy, cast bronze monuments exposed to open atmosphere: corrosive environmental factors, stability and products of corrosion of bronze. In general, all corrosion products present on a metal surface are indicated as 'skate', can be composed of single-layer or multilayer products. The paper also includes a case study on the influence of environmental factors on degradation Matthias monument statue in Cluj-Napoca, Romania. Visual inspection of the monument informs us that have white spots, gray, reddish not consistent with the base color green patina, surfaces showing depigmentation, the rain washed areas, crystallization, deposition of air-borne particles.

  20. Craftmanship, Production and Distribution of Metalwork in the Early and Middle Northern Bronze Age

    DEFF Research Database (Denmark)

    Nørgaard, Heide Wrobel

    possible to compare these traits between different bronze objects. Using a group of bronze objects who are already critically analyzed with regard to the formal characteristics gives a unique opportunity to recognize the workshops and their distribution areas and will be the base of the project.......Workshops and their sphere of influence is an important factor in the identification of social groups who are related to what we term workshop. Here the specialization within the workshop based on certain forms and behaviours can be linked to the knowledge of social groups. Statements about...... the origin of foreign objects can help to clarify social interaction in Bronze Age Europe. The project aims not only to find the centres of production and their distribution areas but also to examine their role in the creation of social identities. The aim is furthermore to examine the techniques used...

  1. Medical image registration algorithms assesment: Bronze Standard application enactment on grids using the MOTEUR workflow engine.

    Science.gov (United States)

    Glatard, Tristan; Montagnat, Johan; Pennec, Xavier

    2006-01-01

    Medical image registration is pre-processing needed for many medical image analysis procedures. A very large number of registration algorithms are available today, but their performance is often not known and very difficult to assess due to the lack of gold standard. The Bronze Standard algorithm is a very data and compute intensive statistical approach for quantifying registration algorithms accuracy. In this paper, we describe the Bronze Standard application and we discuss the need for grids to tackle such computations on medical image databases. We demonstrate MOTEUR, a service-based workflow engine optimized for dealing with data intensive applications. MOTEUR eases the enactment of the Bronze Standard and similar applications on the EGEE production grid infrastructure. It is a generic workflow engine, based on current standards and freely available, that can be used to instrument legacy application code at low cost.

  2. Medical image registration algorithms assesment Bronze Standard application enactment on grids using the MOTEUR workflow engine

    CERN Document Server

    Glatard, T; Pennec, X

    2006-01-01

    Medical image registration is pre-processing needed for many medical image analysis procedures. A very large number of registration algorithms are available today, but their performance is often not known and very difficult to assess due to the lack of gold standard. The Bronze Standard algorithm is a very data and compute intensive statistical approach for quantifying registration algorithms accuracy. In this paper, we describe the Bronze Standard application and we discuss the need for grids to tackle such computations on medical image databases. We demonstrate MOTEUR, a service-based workflow engine optimized for dealing with data intensive applications. MOTEUR eases the enactment of the Bronze Standard and similar applications on the EGEE production grid infrastructure. It is a generic workflow engine, based on current standards and freely available, that can be used to instrument legacy application code at low cost.

  3. THE CHARACTERIZATION OF A CORRODED EGYPTIAN BRONZE STATUE AND A STUDY OF THE DEGRADATION PHENOMENA

    Directory of Open Access Journals (Sweden)

    Mohamed GHONIEM

    2011-06-01

    Full Text Available This paper presents the results of scientific examinations carried out on an Egyptian bronze statue discovered buried in Sais. Optical Microscopy (OM, Scanning Electron Microscopy (SEM coupled with Energy Dispersive Spectroscopy (EDS and X-ray Diffraction (XRD were used to understand the corrosive morphological characteristics of the patina, to investigate the corrosion products, analyze the elementary composition of the statue and to identify the corrosive factors with effects on the alteration processes. The results indicated that the statue was made of bronze alloy, with copper as the main element, besides lead and tin. Three layers of alteration products with various composition and morphology covered the substrate of the bronze alloy. XRD results indicated that the statue was subjected to many corrosive ions such as sulfur and chloride, and buried in wet soil, rich in oxygen and carbon. This study provides useful information for the restoration and protection of the statue.

  4. MarcoPolo-R near earth asteroid sample return mission

    OpenAIRE

    Michel, P.; Böhnhardt, H.; Campo Bagatin, A.; Cerroni, P.; Dotto, E.; Fitzsimmons, A.; Lara, L.-M.; Licandro, J.; Marty, B.; Muinonen, K.; Nathues, A.; Oberst, J.; Robert, F.; Saladino, R.; Ulamec, S.

    2011-01-01

    MarcoPolo-R is a sample return mission to a primitive Near-Earth Asteroid (NEA) proposed in collaboration with NASA. It will rendezvous with a primitive NEA, scientifically characterize it at multiple scales, and return a unique sample to Earth unaltered by the atmospheric entry process or terrestrial weathering. MarcoPolo-R will return bulk samples (up to 2 kg) from an organic-rich binary asteroid to Earth for laboratory analyses, allowing us to: explore the origin of planetary materials and...

  5. Anthracology and paleoecology in the south-eastern quadrant of the Iberian Peninsula: the contributions of the Bronze Age settlement of Terlinques (Villena, Alicante province

    Directory of Open Access Journals (Sweden)

    Machado Yanes, María del Carmen

    2009-06-01

    Full Text Available In this paper we present the results of the charcoal analyses from the Bronze Age settlement of Terlinques (Villena, Alicante. We discuss the predominance of Pinus halepensis in relation to the other woody species. Taking into account the environmental conditions (availability of materials and the bio-geographical context, the Villena Corridor is a frontier territory where floral and climatic influences of the Spanish Meseta and of the Iberian Southeast converge. Comparison with other anthracological and palynological studies allow us to propose some thoughts on palaeoecological changes in the Iberian Southeast.

    Se presentan los resultados del estudio antracológico del yacimiento de la Edad del Bronce de Terlinques (Villena, Alicante. Se discute el dominio de Pinus halepensis en relación a las otras especies leñosas. Teniendo en cuenta los condicionamientos ambientales (disponibilidad de la materia y el marco biogeográfico, el corredor de Villena es un territorio fronterizo donde convergen influencias climáticas y florísticas de la Meseta y del Sureste peninsular. Su comparación con otros estudios antracológicos y palinológicos permiten realizar algunas consideraciones sobre los cambios paleoecológicos en el sureste peninsular.

  6. O desafio do desenvolvimento frente aos marcos ecológico e de mercado em direção à sustentabilidade no século XXI

    Directory of Open Access Journals (Sweden)

    Gustavo Madeira da Silveira

    2010-12-01

    Full Text Available Neste trabalho demonstrar-se-á o desafio do modelo desenvolvimentista atual em direção à preconizada e colimada sustentabilidade. A primeira década deste século XXI foi marcada por dois marcos, um ambiental (as mudanças climáticas e outro de mercado (a crise econômica mundial, que colocaram em cheque o sistema capitalista, tendo em vista as soluções insustentáveis que foram tomadas para enfrentar estes marcos. Foram objeto de análise da pesquisa, a não adesão dos EUA ao Protocolo de Quioto; o contraponto dos países “em desenvolvimento” entre desenvolver-se ora sustentavelmente, ora insustentavelmente; e o fomento do consumo como única alternativa encontrada pelo países para a saída da crise econômica mundial.

  7. Nomadic pastoralism in the Early Bronze Age of the central Balkans evaluation of background knowledge

    Directory of Open Access Journals (Sweden)

    Porčić Marko

    2008-01-01

    Full Text Available The aim of the paper is to examine background knowledge about the orga­nizational properties of mobile pastoral groups in order to assess the likelihood of the existence of pastoral nomads in the Early Bronze Age in the central Balkans. The patterning found by A. L. Johnson (2002 is taken as a point of departure for the cross-cultural analysis conducted in this study. Johnson’s findings are in the main corroborated. Acquired knowledge about the workings of pastoral societies suggests that highly mobile pastoral groups should not be expected in the Early Bronze Age of the central Balkans.

  8. Non-invasive chemical and phase analysis of Roman bronze artefacts from Thamusida (Morocco)

    Energy Technology Data Exchange (ETDEWEB)

    Gliozzo, Elisabetta, E-mail: gliozzo@unisi.i [Dipartimento di Scienze della Terra, Universita di Siena, via Laterina 8, 53100 Siena (Italy); Arletti, Rossella, E-mail: rarletti@unimore.i [Dipartimento di Scienze della Terra, Universita di Modena e Reggio Emilia, Largo S. Eufemia 19, 41100 Modena (Italy); Cartechini, Laura, E-mail: laura@thch.unipg.i [Istituto di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento di Chimica, Universita di Perugia, via Elce di Sotto 8, 06123 Perugia (Italy); Dipartimento di Chimica, Universita di Perugia, via Elce di Sotto 8, 06123 Perugia (Italy); Imberti, Silvia, E-mail: Silvia.Imberti@stfc.ac.u [Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, OX11 0QX (United Kingdom); Kockelmann, Winfried A., E-mail: Winfried.Kockelmann@stfc.ac.u [Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, OX11 0QX (United Kingdom); Memmi, Isabella, E-mail: memmi@unisi.i [Dipartimento di Scienze della Terra, Universita di Siena, via Laterina 8, 53100 Siena (Italy); Rinaldi, Romano, E-mail: rrinaldi@unipg.i [Dipartimento di Chimica, Universita di Perugia, via Elce di Sotto 8, 06123 Perugia (Italy); Tykot, Robert H., E-mail: rtykot@cas.usf.ed [Department of Anthropology, University of South Florida, Tampa, FL 33620 (United States)

    2010-12-15

    A repertory of Roman military bronze equipment (1st- 3rd century AD) found at the archaeological site of Thamusida (Rabat, Morocco) was analysed by non-destructive X-ray fluorescence and time of flight neutron diffraction (TOF-ND). Most objects are made of leaded alloys, where copper is combined with tin and/or zinc and, in six cases, to arsenic as well. A mixed technology was employed, making a limited use of 'pure' semi-finished materials if compared with the large utilization of recycled materials (brass and bronze).

  9. SETA: An Imaging Spectrometer for Marco Polo Mission

    Science.gov (United States)

    de Sanctis, M. C.; Filacchione, G.; Capaccioni, F.; Piccioni, G.; Ammannito, E.; Capria, M. T.; Coradini, A.; Migliorini, A.; Battistelli, E.; Preti, G.

    2010-03-01

    The aim of the SETA experiment is to perform imaging spectroscopy in the spectral range 400-3300 nm for a complete mapping of the Marco Polo target with a spectral sampling of at least 20 nm and a spatial resolution on the order of meters.

  10. MARCO POLO: A Near Earth Object Sample Return Mission

    Science.gov (United States)

    Barucci, M. A.; Yoshikawa, M.; Michel, P.; Kawaguchi, J.; Yano, H.; Brucato, J. R.; Franchi, I. A.; Dotto, E.; Fulchignoni, M.; Ulamec, S.; Boehnhardt, H.; Coradini, M.; Green, S. F.; Josset, J.-L.; Koschny, D.; Muinonen, M.; Oberst, J.; Marco Polo Scienc

    2008-03-01

    MARCO POLO is a joint European-Japanese sample return mission to a near-Earth object. In late 2007 this mission was selected by ESA, in the framework of COSMIC VISION 2015-2025, for an assessment scheduled to last until mid 2009.

  11. El Marco Jurídico del Voluntariado

    OpenAIRE

    Reverte Martínez, Francisco Manuel; López Alcantud, Andres; Pan Sánchez-Blanco, Pedro

    2005-01-01

    Introducción al marco jurídico del voluntariado en España y análisis de legislacion autonómica, incluyendo anexos con modelos de reglamento y compromiso voluntario Comunidad Autónoma de la Región de Murcia.

  12. Het onderzoek van Marco Hoffman : 'Communicatie over naamgeving belangrijk'

    NARCIS (Netherlands)

    Dwarswaard, A.; Hoffman, M.H.A.

    2009-01-01

    Tientallen onderzoekers houden zich bezig met onderzoek aan bloembollen en vaste planten. Niet alleen in Lisse of Zwaagdijk, maar ook op tal van andere plaatsen. De serie Het onderzoek van… laat onderzoekers vertellen waar zij op dit moment mee bezig zijn. In deze aflevering PPO-onderzoeker Marco

  13. La lectura hipermedial. Hacia un marco teórico

    National Research Council Canada - National Science Library

    Zamora Suárez, Liliana

    2016-01-01

    El objetivo de este trabajo es establecer el marco teórico hacia un aprendizaje significativo durante la lectura hipermedial teniendo en cuenta los procesos cognitivos que se ponen en marcha en el transcurso de la práctica lectora...

  14. Ser gestante soropositivo para o Vírus da Imunodeficiência Humana: uma leitura à luz do Interacionismo Simbólico Ser gestante seropositiva para el Virus de la inmunodeficiencia humana-HIV: una lectura bajo el marco teórico del Interaccionismo Simbólico Being pregnant seropositive and having acquired the human immunodeficiency Virus (HIV: a theoretical interpretation under the Symbolic Interactionism

    Directory of Open Access Journals (Sweden)

    Edilene Lins de Moura

    2010-04-01

    Full Text Available OBJETIVO: Descrever o contexto do cotidiano vivido por mulheres grávidas soropositivas para o Vírus da Imunodeficiência Humana (HIV, com enfoque na experiência de tornar-se grávida e assumir a gravidez. MÉTODOS: Os dados foram coletados por meio de entrevista gravada, com 14 gestantes sabidamente soropositivas para o HIV, que vivenciavam o terceiro trimestre de gravidez. O estudo fez uma leitura de dados brutos sobre expectativas e ações de gestantes soropositivas para o HIV, à luz do Interacionismo Simbólico. RESULTADOS: um dos aspectos encontrados mostrou que as mulheres HIV positivo assumem a gravidez, ainda que esta seja inesperada. CONCLUSÕES: os dados são um alerta para os profissionais de enfermagem que devem promover ações educativas para atender às demandas dessa mulher.OBJETIVO: Describir el contexto cotidiano vivido por mujeres embarazadas y seropositivas para el virus de la inmunodeficiencia humana (HIV, con enfoque en la experiencia de estar embarazada y aceptar ese estado. MÉTODOS: Los datos fueron recolectados por medio de entrevista grabada, con 14 gestantes sabidamente seropositivas para el HIV, que se encontraban en el tercer trimestre de embarazo. El estudio hizo una lectura de los datos brutos sobre expectativas y acciones de las gestantes seropositivas para el HIV, bajo el marco teórico del Interaccionismo Simbólico. RESULTADOS: Uno de los aspectos encontrados mostró que las mujeres infectadas con Sida aceptan el embarazo, inclusive cuando ocurre inesperadamente. CONCLUSIONES: Los datos sirven de para los profesionales de enfermería para que promuevan acciones educativas que atiendan las necesidades de esas mujeres.OBJECTIVE: To describe the context of everyday life experienced by pregnant women seropositive for human immunodeficiency virus (HIV, focusing on the experience of becoming pregnant and accepting that condition. METHODS: Data were collected recording interviews with 14 pregnant women known to

  15. Hittites and "barbarians" in the Late Bronze Age: regional survey in northern Turkey

    OpenAIRE

    Matthews, Roger

    1999-01-01

    The Hittites have attracted less attention from British archaeologists than other Bronze Age states of ancient Southwest Asia, and yet in the second millennium BC they controlled most of Anatolia and at the peak of their power they even conquered Babylon. Here the Director of the British Institute of Archaeology at Ankara describes new research on the northwest frontier of the Hittite empire.

  16. Study on surface properties of gilt-bronze artifacts, after Nd:YAG laser cleaning

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Hyeyoun [Division of Restoration Technology, National Research Institute of Cultural Heritage, Daejeon (Korea, Republic of); Cho, Namchul, E-mail: nam1611@hanmail.net [Department of Cultural Heritage Conservation Science, Kongju National University, Gongju, 314-701 (Korea, Republic of); Lee, Jongmyoung [Laser Engineering Group, IMT Co. Ltd, Gyeonggi (Korea, Republic of)

    2013-11-01

    As numerous pores are formed at plating gilt-bronze artifacts, the metal underlying the gold is corroded and corrosion products are formed on layer of gold. Through this study, the surfaces of gilt-bronze are being investigated before and after the laser irradiation to remove corrosion products of copper by using Nd:YAG laser. For gilt-bronze specimens, laser and chemical cleaning were performed, and thereafter, surface analysis with SEM-EDS, AFM, and XPS were used to determine the surface characteristics. Experimental results show that chemical cleaning removes corrosion products of copper through dissolution but it was not removed uniformly and separated the metal substrate and the gold layer. Nevertheless, through laser cleaning, some of the corrosions were removed with some damaged areas due to certain conditions and brown residues remained. Brown residues were copper corrosion products mixed with soil left within the gilt layer. It was due to surface morphology of uneven and rough gilt layer. Hence, they did not react effectively to laser beams, and thus, remained as residues. The surface properties of gilt-bronze should be thoroughly investigated with various surface analyses to succeed in laser cleaning without damages or residues.

  17. The sodium tungsten bronzes as plasmonic materials: fabrication, calculation and characterization

    Science.gov (United States)

    Tegg, Levi; Cuskelly, Dylan; Keast, Vicki J.

    2017-06-01

    The tungsten bronzes are non-stoichiometric transition metal oxides of the form M x WO3, where 0  ⩽  x  ⩽  1, and M is a dopant ion, most commonly an alkali metal. In this work, the sodium tungsten bronzes (Na x WO3) are investigated as materials for plasmonic applications. The bronzes were fabricated with a solid state reaction, the dielectric function calculated using density functional theory (DFT) and the nanoparticle responses calculated with the boundary element method (BEM). The results were compared to Au and Ag, the materials most widely used in plasmonic applications. It was shown that for x  >  0.5, the solid state fabrication method produces cube-shaped particles of diameter  ⩾1 µm, whose bulk optical properties are well described by a free-electron model and a rigid band structure. The addition of Na into the lattice increases the free electron density, increasing the bulk plasma frequency. Nanoparticle plasmon resonances are found to be highly tunable, and generally at a lower frequency than Au or Ag, and so sodium tungsten bronzes are predicted to be well suited to biomedical or chemical sensing applications.

  18. Characterisation of a Proto-historic bronze collection by micro-EDXRF

    Energy Technology Data Exchange (ETDEWEB)

    Figueiredo, Elin, E-mail: elin@itn.pt [IST/ITN, Instituto Superior Técnico, Universidade Técnica de Lisboa, Estrada Nacional 10, 2686-953 Sacavém (Portugal); CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica (Portugal); Araújo, M. Fátima [IST/ITN, Instituto Superior Técnico, Universidade Técnica de Lisboa, Estrada Nacional 10, 2686-953 Sacavém (Portugal); Silva, Rui J.C. [CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica (Portugal); Vilaça, Raquel [CEAUCP-FCT, Instituto de Arqueologia, Departamento de História, Arqueologia e Artes, Faculdade de Letras, Universidade de Coimbra, Palácio de Sub-Ripas, 3000-395 Coimbra (Portugal)

    2013-02-01

    Highlights: ► A collection of Proto-historic metal artefacts was analysed by micro-EDXRF. ► Composition of major and minor elements has been determined. ► Artefacts were manufactured in a bronze alloy with a low impurity pattern. ► The alloy shows parallels with indigenous Late Bronze Age Iberian productions. -- Abstract: Studies concerning European Proto-historic metallic artefacts can provide important clues about technological transfers during a period of time characterised by diverse cultural interactions. A collection of Proto-historic metallic artefacts from Medronhal (western Iberian Peninsula) composed by rings, bracelets and a fibula related to different cultural affiliations were investigated by micro-EDXRF to provide a major and a minor elemental characterisation. Results show that the Medronhal collection was manufactured in a Cu–Sn alloy (binary bronze) with similar Sn contents among the various types of artefacts and a low impurity pattern. Results of the type and quality of metal were compared to other artefact collections to infer about metallurgical parallels. Strong parallels with indigenous Late Bronze Age Iberian metallurgical productions were found.

  19. Isotopic dietary reconstruction of humans from Middle Bronze Age Lerna, Argolid, Greece

    NARCIS (Netherlands)

    Triantaphyllou, S.; Richards, M. P.; Zerner, C.; Voutsaki, S.

    2008-01-01

    This study presents the results of a carbon and nitrogen stable isotope analysis of 39 human bone and 8 animal samples from Middle Bronze Age (or Middle Helladic, MH, ca. 2100-1700 BC) Lerna, Greece. The isotopic data indicate that the humans had a C-3 terrestrial diet while certain individuals

  20. Antibacterial drugs as corrosion inhibitors for bronze surfaces in acidic solutions

    Energy Technology Data Exchange (ETDEWEB)

    Rotaru, Ileana [Department of Chemical Engineering, “Babes-Bolyai” University, 11 Arany-Janos St., 400028 Cluj-Napoca (Romania); Varvara, Simona, E-mail: svarvara@uab.ro [Department of Exact Sciences and Engineering, “1 Decembrie 1918” University, 11-13 Nicolae Iorga St., 510009 Alba Iulia (Romania); Gaina, Luiza [Department of Chemical Engineering, “Babes-Bolyai” University, 11 Arany-Janos St., 400028 Cluj-Napoca (Romania); Muresan, Liana Maria, E-mail: limur@chem.ubbcluj.ro [Department of Chemical Engineering, “Babes-Bolyai” University, 11 Arany-Janos St., 400028 Cluj-Napoca (Romania)

    2014-12-01

    Graphical abstract: - Highlights: • All four investigated antibacterial drugs act as corrosion inhibitors for bronze surface. • In the presence of antibiotics, a 3RC electric circuit simulates the corrosion system. • The electrochemical results indicate as best inhibitors Doxy, followed by Strepto. • HOMO–LUMO energy gap increases in the order: Doxy > Strepto > Cipro > Amoxi. • The thin protective film on bronze is reinforced by the presence of the antibiotics. - Abstract: The present study is aiming to investigate the effect of four antibiotics (amoxicillin, ciprofloxacin, doxycycline and streptomycin,) belonging to different classes of antibacterial drugs on bronze corrosion in a solution simulating an acid rain (pH 4). Due to their ability to form protective films on the metal surface, the tested antibiotics act as corrosion inhibitors for bronze. The antibiotics were tested at various concentrations in order to determine the optimal concentration range for the best corrosion inhibiting effect. In evaluating the inhibition efficiency, polarization curves, electrochemical impedance spectroscopy, SEM and XPS measurements were used. Moreover, a correlation between the inhibition efficiency of some antibacterial drugs and certain molecular parameters was determined by quantum chemical computations. Parameters like energies E{sub HOMO} and E{sub LUMO} and HOMO–LUMO energy gap were used for correlation with the corrosion data.

  1. Strangers in a strange land: Egyptians in southern Palestine during the Bronze Age

    Directory of Open Access Journals (Sweden)

    Rachael Sparks

    2002-10-01

    Full Text Available When the Institute of Archaeology was formally established in 1937, it became responsible for housing Sir Flinders Petrie’s collection of archaeological material from Palestine. This unique inheritance has great value as a research collection, as its curator demonstrates here in her discussion of interaction between Egypt and Palestine in the Bronze Age.

  2. Genetic variation of the bronze locus (MC1R in turkeys from Southern Brazil

    Directory of Open Access Journals (Sweden)

    Josmael Corso

    2017-03-01

    Full Text Available Abstract Domestic turkeys present several color phenotypes controlled by at least five genetic loci, but only one of these has been identified precisely: the bronze locus, which turned out to be the melanocortin-1 receptor (MC1R gene. MC1R variation is important for breeders interested in maintaining or developing different color varieties. In this study, we sequenced most of the MC1R gene from 16 White Holland (the main commercial turkey variety and 19 pigmented turkeys from southern Brazil with two purposes. The first was to describe the MC1R diversity in White Holland turkeys, which may serve as reservoirs of genetic diversity at this locus. The second was to test whether the traditional color classification used by Brazilian breeders is related to previously known MC1R alleles. White Holland turkeys had four different haplotypes corresponding to the bronze (b+ and black-winged bronze (b1 alleles. Pigmented turkeys also had four haplotypes corresponding to the b+ and b1 alleles, but different haplotypes represent the most common b+ allele in these two groups. The black (B allele was absent from our samples. Overall, our results suggest that white and pigmented individuals form two different populations, and that the traditional color classification used by Brazilian breeders cannot accurately predict the genotypes at the bronze locus.

  3. Genetic variation of the bronze locus (MC1R) in turkeys from Southern Brazil.

    Science.gov (United States)

    Corso, Josmael; Hepp, Diego; Ledur, Mônica C; Peixoto, Jane O; Fagundes, Nelson J R; Freitas, Thales R O

    2017-01-01

    Domestic turkeys present several color phenotypes controlled by at least five genetic loci, but only one of these has been identified precisely: the bronze locus, which turned out to be the melanocortin-1 receptor (MC1R) gene. MC1R variation is important for breeders interested in maintaining or developing different color varieties. In this study, we sequenced most of the MC1R gene from 16 White Holland (the main commercial turkey variety) and 19 pigmented turkeys from southern Brazil with two purposes. The first was to describe the MC1R diversity in White Holland turkeys, which may serve as reservoirs of genetic diversity at this locus. The second was to test whether the traditional color classification used by Brazilian breeders is related to previously known MC1R alleles. White Holland turkeys had four different haplotypes corresponding to the bronze (b+) and black-winged bronze (b1) alleles. Pigmented turkeys also had four haplotypes corresponding to the b+ and b1 alleles, but different haplotypes represent the most common b+ allele in these two groups. The black (B) allele was absent from our samples. Overall, our results suggest that white and pigmented individuals form two different populations, and that the traditional color classification used by Brazilian breeders cannot accurately predict the genotypes at the bronze locus.

  4. Electrodeposition and corrosion resistance of nanocrystalline white bronze (CuSn) coatings

    NARCIS (Netherlands)

    Hovestad, A.; Lekka, M.; Willemsen, R.M.R.; Tacken, R.A.; Bonora, P.L.

    2008-01-01

    For jewellery applications electroplated white bronze (CuSn) was investigated as undercoating for noble metal finishes as alternative to nickel. A strongly acidic plating bath was developed with an organic additive to suppress hydrogen evolution and obtain bright coatings. An electrochemical study

  5. La médaille de bronze du CNRS à un physicien clermontois

    CERN Multimedia

    2005-01-01

    Evey year, the National center for scientific research (CNRS), rewards around fifty of searchers at various stages of their career. The bronze medal rewards the first work of a searcher, making of him a specialist in his field; Philippe Crochet was awarded this medal

  6. Exposition and Synthesis of Benin Bronze Casting: Emphasis on the Olotan Casters of Benin

    Science.gov (United States)

    Ifeta, Chris Funke

    2016-01-01

    The introduction of Western education to Nigeria has brought in its wake great strides toward development. Changes in Benin dates far back to the dawn of the 20th century. This paper investigates the critical role of education in development. The paper integrates interview data collected from bronze casters in Benin. The first section of the paper…

  7. The Agro Pontino region, refuge after the Early Bronze Age Avellino eruption of Mount Vesuvius, Italy?

    NARCIS (Netherlands)

    Bakels, C.; Sevink, J.; Kuijper, W.; Kamermans, H.

    2015-01-01

    In recent years it was discovered that the Middle to Late Holocene infi ll of the Agro Pontino graben (Central Italy) held a tephra layer originating from the Avellino eruption of the Vesuvius volcano. The eruption is dated to 1995 ± 10 calBC and took therefore place during the Early Bronze Age.

  8. Cold Spraying of Cu-Al-Bronze for Cavitation Protection in Marine Environments

    Science.gov (United States)

    Krebs, S.; Gärtner, F.; Klassen, T.

    2015-01-01

    Traveling at high speeds, ships have to face the problem of rudder cavitation-erosion. At present, the problem is countered by fluid dynamically optimized rudders, synthetic, and weld-cladded coatings on steel basis. Nevertheless, docking and repair is required after certain intervals. Bulk Cu-Al-bronzes are in use at ships propellers to withstand corrosion and cavitation. Deposited as coatings with bulk-like properties, such bronzes could also enhance rudder life times. The present study investigates the coating formation by cold spraying CuAl10Fe5Ni5 bronze powders. By calculations of the impact conditions, the range of optimum spray parameters was preselected in terms of the coating quality parameter η on steel substrates with different temperatures. As-atomized and annealed powders were compared to optimize cavitation resistance of the coatings. Results provide insights about the interplay between the mechanical properties of powder and substrate for coating formation. Single particle impact morphologies visualize the deformation behavior. Coating performance was assessed by analyzing microstructures, bond strength, and cavitation resistance. These first results demonstrate that cold-sprayed bronze coatings have a high potential for ensuring a good performances in rudder protection. With further optimization, such coatings could evolve towards a competitive alternative to existing anti-cavitation procedures.

  9. Recortes de paisagens urbanas brasileiras: marcos de paisagem e áreas verdes cariocas e paulistanas

    Directory of Open Access Journals (Sweden)

    YURI TAVARES ROCHA

    2010-06-01

    Full Text Available Discutem-se quatro recortes de paisagens urbanas brasileiras e de como estão em relação às suas principais condições ambientais e culturais. Os recortes foram: dois importantes marcos de paisagem urbana – Floresta da Tijuca e Rio Tietê – e duas áreas verdes urbanas muito freqüentadas por seus citadinos – Lagoa Rodrigo de Freitas e Parque Villa-Lobos – dos mais importantes centros metropolitanos brasileiros – Rio de Janeiro e São Paulo, adotando-se as escalas de análise propostas pelo tema do 5º Simpósio Internacional de Paisagismo: jardins e paisagens

  10. New archaeomagnetic directions from Portugal and evolution of the geomagnetic field in Iberia from Late Bronze Age to Roman Times

    Science.gov (United States)

    Palencia-Ortas, A.; Osete, M. L.; Campuzano, S. A.; McIntosh, G.; Larrazabal, J.; Sastre, J.; Rodriguez-Aranda, J.

    2017-09-01

    This study presents new archaeomagnetic results from 33 combustion structures (kilns and hearths) from the archaeological sites of Castelinho, Crestelos, Olival Poço da Barca and Fonte do Milho in NE Portugal. The age of the investigated structures ranges from 1210 BC to 200 AD according to calibrated radiocarbon dating, thermoluminescence dating and archaeological constraints. Stepwise thermal and alternating field demagnetization isolate a single, stable, characteristic remanence component with very well defined directions. Rock magnetic analyses suggest low-Ti titanomagnetite/maghemite as the main magnetic carrier of the remanence. Mean directions are well grouped in most structures. The effect of thermoremanent anisotropy on mean directions has been evaluated and was found to be important. Inclination increases of between 2° and 13° after applying the anisotropy correction at specimen level. This highlights the requirement of evaluating this effect on the directions of small and flattened thin kilns and hearths. The 31 new directional data improve both the temporal and spatial distribution of the Iberian archaeomagnetic dataset from Late Bronze Age to Roman Times. Finally, a new directional palaeosecular variation curve for Iberia for the last twelve centuries BC is proposed. The curve has been computed using the bootstrap method and includes data coming from sites within 900 km of Madrid. The new palaeodirectional secular variation curve for Iberia is consistent with the Western European palaeosecular variation curve and with the prediction of regional European models.

  11. Critical Commodities: Tracing Greek Trade in Oil and Wine from the Late Bronze Age to the Archaic Period

    OpenAIRE

    Pratt, Catherine Elizabeth

    2014-01-01

    Most studies of the Greek oil and wine industry focus either on the Late Bronze Age or the Classical Period, rarely mentioning the Early Iron Age (so often cast as a Dark Age) between the two. This dissertation attempts to fill this gap by investigating evidence for the continuity of a surplus economy between the Late Bronze Age and the Archaic period. Specifically, I examine what type of oil and wine economy existed in the Late Bronze Age (LBA), how this economy continued into the Early Iron...

  12. 33 CFR 147.837 - Marco Polo Tension Leg Platform safety zone.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Marco Polo Tension Leg Platform... SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES SAFETY ZONES § 147.837 Marco Polo Tension Leg Platform safety zone. (a) Description. Marco Polo Tension Leg Platform, Green Canyon 608 (GC 608), located...

  13. X-ray Photoelectron Spectroscopy as a tool to investigate silane-based coatings for the protection of outdoor bronze: The role of alloying elements

    Science.gov (United States)

    Masi, G.; Balbo, A.; Esvan, J.; Monticelli, C.; Avila, J.; Robbiola, L.; Bernardi, E.; Bignozzi, M. C.; Asensio, M. C.; Martini, C.; Chiavari, C.

    2018-03-01

    Application of a protective coating is the most widely used conservation treatment for outdoor bronzes (cast Cu-Sn-Zn-Pb-Sb alloys). However, improving coating protectiveness requires detailed knowledge of the coating/substrate chemical bonding. This is particularly the case for 3-mercapto-propyl-trimethoxy-silane (PropS-SH) applied on bronze, exhibiting a good protective behaviour in outdoor simulated conditions. The present work deals with X-Ray Photoelectron Spectroscopy (XPS) and Electron Microscopy (FEG-SEM + FIB (Focused Ion Beam)) characterization of a thin PropS-SH film on bronze. In particular, in order to better understand the influence of alloying elements on coating performance, PropS-SH was studied first on pure Cu and Sn substrates then on bronzes with increasing alloy additions: Cu8Sn as well as a quinary Cu-Sn-Zn-Pb-Sb bronze. Moreover, considering the real application of this coating on historical bronze substrates, previously artificially aged ("patinated") bronze samples were prepared and a comparison between bare and "patinated" quinary bronzes was performed. In the case of coated quinary bronze, the free surface of samples was analysed by High Resolution Photoelectron Spectroscopy using Synchrotron Radiation (HR-SRPES) at ANTARES (Synchrotron SOLEIL), which offers a higher energy and lateral resolution. By compiling complementary spectroscopic and imaging information, a deeper insight into the interactions between the protective coating and the bronze substrate was achieved.

  14. MarcoPolo-R near earth asteroid sample return mission

    Science.gov (United States)

    Barucci, Maria Antonietta; Cheng, A. F.; Michel, P.; Benner, L. A. M.; Binzel, R. P.; Bland, P. A.; Böhnhardt, H.; Brucato, J. R.; Campo Bagatin, A.; Cerroni, P.; Dotto, E.; Fitzsimmons, A.; Franchi, I. A.; Green, S. F.; Lara, L.-M.; Licandro, J.; Marty, B.; Muinonen, K.; Nathues, A.; Oberst, J.; Rivkin, A. S.; Robert, F.; Saladino, R.; Trigo-Rodriguez, J. M.; Ulamec, S.; Zolensky, M.

    2012-04-01

    MarcoPolo-R is a sample return mission to a primitive Near-Earth Asteroid (NEA) proposed in collaboration with NASA. It will rendezvous with a primitive NEA, scientifically characterize it at multiple scales, and return a unique sample to Earth unaltered by the atmospheric entry process or terrestrial weathering. MarcoPolo-R will return bulk samples (up to 2 kg) from an organic-rich binary asteroid to Earth for laboratory analyses, allowing us to: explore the origin of planetary materials and initial stages of habitable planet formation; identify and characterize the organics and volatiles in a primitive asteroid; understand the unique geomorphology, dynamics and evolution of a binary NEA. This project is based on the previous Marco Polo mission study, which was selected for the Assessment Phase of the first round of Cosmic Vision. Its scientific rationale was highly ranked by ESA committees and it was not selected only because the estimated cost was higher than the allotted amount for an M class mission. The cost of MarcoPolo-R will be reduced to within the ESA medium mission budget by collaboration with APL (John Hopkins University) and JPL in the NASA program for coordination with ESA's Cosmic Vision Call. The baseline target is a binary asteroid (175706) 1996 FG3, which offers a very efficient operational and technical mission profile. A binary target also provides enhanced science return. The choice of this target will allow new investigations to be performed more easily than at a single object, and also enables investigations of the fascinating geology and geophysics of asteroids that are impossible at a single object. Several launch windows have been identified in the time-span 2020-2024. A number of other possible primitive single targets of high scientific interest have been identified covering a wide range of possible launch dates. The baseline mission scenario of MarcoPolo-R to 1996 FG3 is as follows: a single primary spacecraft provided by ESA, carrying

  15. Programa Regional de Indicadores de Desarrollo Infantil (PRIDI): Marco Conceptual

    OpenAIRE

    Patrice Engle; Santiago Cueto; María Estela Ortíz; Aimee Verdisco

    2011-01-01

    El presente documento entrega el marco conceptual y la fundamentación del Proyecto Regional de Indicadores de Desarrollo Infantil (PRIDI), una iniciativa del Banco Interamericano de Desarrollo (BID), cuyo objetivo es generar un programa regional de compilación y uso de datos e indicadores comparables de resultados sobre Desarrollo Infantil (DI). Inspirado por las experiencias del Banco en apoyar pruebas estandarizadas como son el LLECE y el SERCE, esperamos que el carácter regional de los res...

  16. Marco Polo: Near-Earth Object Sample Return Mission

    Science.gov (United States)

    Antonieta Barucci, Maria; Yoshikawa, M.; Koschny, D.; Boehnhardt, H.; Brucato, J. R.; Coradini, M.; Dotto, E.; Franchi, I. A.; Green, S. F.; Josset, J. L.; Kawagushi, J.; Michel, P.; Muinonen, K.; Oberst, J.; Yano, H.; Binzel, R. P.; Marco Polo Science Team

    2008-09-01

    MARCO POLO is a joint European-Japanese sample return mission to a Near-Earth Object (NEO), selected by ESA in the framework of COSMIC VISION 2015-2025 for an assessment study scheduled to last until October 2009. This Euro-Asian mission will go to a primitive Near-Earth Object (NEO), such as C or D-type, scientifically characterize it at multiple scales, and bring samples back to Earth for detailed scientific investigation. NEOs are part of the small body population in the Solar System, which are leftover building blocks of the Solar System formation process. They offer important clues to the chemical mixture from which planets formed about 4.6 billion years ago. The scientific objectives of Marco Polo will therefore contribute to a better understanding of the origin and evolution of the Solar System, the Earth, and the potential contribution of primitive material to the formation of Life. Marco Polo is based on a launch with a Soyuz Fregat and consists of a Mother Spacecraft (MSC), possibly carrying a lander. The MSC would approach the target asteroid and spend a few months for global characterization of the target to select a sampling site. Then, the MSC would then descend to retrieve several samples which will be transferred to a Sample Return Capsule (SRC). The MSC would return to Earth and release the SRC into the atmosphere for ground recovery. The sample of the NEO will then be available for detailed investigation in ground-based laboratories. In parallel to JAXA considering how to perform the mission, ESA has performed a Marco Polo study in their Concurrent Design Facility (CDF). Two parallel industrial studies will start in September 2008 to be conducted in Europe for one year. The scientific objectives addressed by the mission and the current status of the mission study (ESA-JAXA) will be presented and discussed.

  17. Marco Antonio Chaer Nascimento a festschrift from theoretical chemistry accounts

    CERN Document Server

    Ornellas, Fernando R

    2014-01-01

    In this Festschrift dedicated to the 65th birthday of Marco Antonio Chaer Nascimento, selected researchers in theoretical chemistry present research highlights on major developments in the field. Originally published in the journal Theoretical Chemistry Accounts, these outstanding contributions are now available in a hardcover print format. This volume will be of benefit in particular to those research groups and libraries that have chosen to have only electronic access to the journal. It also provides valuable content for all researchers in theoretical chemistry.

  18. Preliminary Study of Corrosion Status on Bronzes Excavated from Qin Dynasty Tombs at Xinfeng Town in China

    Directory of Open Access Journals (Sweden)

    Qian-li Fu

    2012-01-01

    Full Text Available From 2007 to 2008, many bronze wares of Qin Dynasty were excavated from tombs at Xinfeng town. Being an important finding, these bronze wares attracted people’s attention, especially for their conservation. Therefore, the corrosive products were explored by using Scanning Electron Microscope with Energy Dispersive X-ray Detector (SEM/EDS, X-Ray diffraction (XRD, and Raman spectroscopy (RM, which provided much valuable information on the conservation of these bronze wares. According to tested results, the corrosive products of bronzes were found to be comprised of cuprite (Cu2O, covellite (CuS, lead carbonate (PbCO3, and malachite (CuCO3·Cu(OH2. Meantime, the multilayer corrosive structure was found in some samples due to the cracks in Cu2O layer which had formed many microchannels to promote the material migration.

  19. MarcoPolo-R: Asteroid Sample Return Mission

    Science.gov (United States)

    Brucato, John Robert

    2012-07-01

    MarcoPolo-R is a sample return mission to a primitive Near-Earth Asteroid (NEA) selected for the assessment study in the framework of ESA Cosmic Vision 2015-25 program. MarcoPolo-R is an European-led mission with a proposed NASA contribution. MarcoPolo-R will rendezvous with a primitive carbon-rich NEA, scientifically characterize it at multiple scales, and return a unique sample to Earth unaltered by the atmospheric entry process or terrestrial weathering. The baseline target is a binary asteroid (175706) 1996 FG3, which offers a very efficient operational and technical mission profile. A binary target also provides enhanced science return. The choice of this target will allow new investigations to be performed more easily than at a single object, and also enables investigations of the fascinating geology and geophysics of asteroids that are impossible at a single object. Several launch windows have been identified in the time-span 2020-2024. The baseline mission scenario of MarcoPolo-R to 1996 FG3 foresees a single primary spacecraft, carrying the Earth re-entry capsule and sample acquisition and transfer system, launched by a Soyuz-Fregat rocket from Kourou. The scientific payload includes state-of-the-art instruments, e.g. a camera system for high resolution imaging from orbit and on the surface, spectrometers covering visible, near-infrared and mid-infrared wavelengths, a neutral-particle analyser, a radio science experiment and optional laser altimeter. If resources are available, an optional Lander will be added to perform in-situ characterization close to the sampling site, and internal structure investigations. MarcoPolo-R will allow us to study the most primitive materials available to investigate early solar system formation processes. The main goal of the MarcoPolo-R mission is to return unaltered NEA material for detailed analysis in ground-based laboratories. Only in the laboratory can instruments with the necessary precision and sensitivity be

  20. Gestão Social nos marcos neoliberais: única alternativa à democracia?

    Directory of Open Access Journals (Sweden)

    Marília Gonçalves Dal Bello

    2010-07-01

    Full Text Available O trabalho aqui apresentado tem como foco a gestão social nos marcos do neoliberalismo nos anos 1970, momento em que é colocada como estratégia para exaltar o mercado como instância de regulação econômica e política da vida social, em detrimento do cercear da participação da sociedade civil como instância participativa, tendo em vista a construção de uma gestão pública democrática. Assim, o objetivo deste trabalho é tecer uma discussão sobre as distorções teóricas e práticas em torno do termo sociedade civil, a fim de elucidar o sentido de participação, como lócus de proposições e disputas que permeiam a construção democrática. Isso se contrapõe a ideia de sociedade civil como sinônimo de solidariedade, voluntariado ou terceiro setor. A metodologia do trabalho associou-se à revisão bibliográfica, cujos referenciais contribuíram para uma apresentação crítica sobre a gestão social. Os resultados aqui apresentados apontam para a necessidade de uma maior consolidação dos espaços públicos e da sociedade civil como atores de fundamental importância para a construção de uma gestão pública democrática.

  1. Combined effects of graphite and sulfide on the tribological properties of bronze under dry conditions

    Directory of Open Access Journals (Sweden)

    Yoshimasa Hirai

    2016-12-01

    Full Text Available The present study describes the tribological properties of penetrated-graphite bronze containing micro-sized sulfide under dry conditions. The graphite penetration was carried out by means of roller burnishing. Micro shot peening was also applied in order to fabricate micro dimples in the penetrated graphite. The graphite area fraction was approximately 50%. The tribological properties were evaluated using a face-to-face type testing apparatus under dry conditions. The results showed that the friction coefficient of the sulfide-containing bronze decreased and the seizure resistance properties significantly increased. The friction distance until seizure occurrence was improved to more than 2.5 times. Furthermore, the friction coefficient was low and stable until the end of the experiment. It was inferred that the friction resistance was decreased and stabilized when the transfer layer was without Fe content.

  2. Palaeodemographic and palaeopathological characteristics of individuals buried in three Bronze Age sites from southern Croatia

    Directory of Open Access Journals (Sweden)

    M. Novak

    2011-12-01

    Full Text Available The purpose of this study is to reconstruct paleodemographic and paleopathological characteristics of sixteen individuals (three subadults, seven males and six females buried in three Bronze Age sites (Crip, Matkovići, and Veliki Vanik located in southern Croatia. The analysed sample is characterised by the presence of pathological changes which are often associated with stressful episodes such as anaemia, inadequate nutrition, infectious diseases and the occurrence of parasites. Cribra orbitalia, dental enamel hypoplasia, porotic hyperostosis and periostitis were observed in seven out of sixteen analysed skeletons. One ulnar “parry” fracture and three fractures of the frontal bone strongly suggest the presence of deliberate interpersonal violence within the studied communities. The average life span of the adults, as well as the number and character of the observed pathologies, suggest a relatively poor life quality and harsh living conditions in the studied region during the Bronze Age.

  3. Effect of Microstructure on Mechanical Properties of BA1055 Bronze Castings

    Directory of Open Access Journals (Sweden)

    Łabanowski J.

    2014-06-01

    Full Text Available The article presents research results performed on aluminum bronze CuAl10Fe5Ni5 (BA1055 castings used for marine propellers. Metallographic studies were made on light microscope and a scanning electron microscope to assess quantitatively and qualitatively the alloy microstructure. It has been shown that the shape, size and distribution of the iron-rich к−phase precipitates in bronze microstructure significantly affect its mechanical properties. With an increase in the number of small к−phase precipitates increases the tensile strength of castings, while the presence of large globular precipitates improves ductility. Fragmentation and shape of κ−phase precipitates depends on many factors, particularly on the chemical composition of the alloy, Fe/Ni ratio, cooling rate and casting technology.

  4. Connections: the relationships between Neolithic and Bronze Age Megalithic Astronomy in Britain

    CERN Document Server

    Higginbottom, Gail

    2015-01-01

    It has already been empirically verified that for many Bronze Age monuments erected in Scotland between 1400-900 BC, there was a concerted effort on behalf of the builders to align their monuments to astronomical bodies on the horizon. It has also been found that there are two common sets of complex landscape and astronomical patternings, combining specific horizon qualities, like distance and elevation, with the rising and setting points of particular astronomical phenomena. However, it has only been very recently demonstrated by us that that the visible astronomical-landscape variables found at Bronze Age sites on the inner isles and mainland of western Scotland were first established nearly two millennia earlier, with the erection of the mooted first standing-stone 'great circles' in Britain: Callanish and Stenness of Scotland (see G. Higginbottom and R. Clay, The Origins of Standing Stone Astronomy in Britain submitted to Journal of Archaeological Science & available on ArXiv). In the current paper we...

  5. An AMS dated late Bronze Age grave from the mound necropolis at Paulje

    Directory of Open Access Journals (Sweden)

    Gligorić Rada

    2016-01-01

    Full Text Available The subject of the paper is a closed entity - an incineration grave from northwest Serbia, dated to the developed Bronze Age, with an absolute date obtained by AMS (Accelerator mass spectrometry. The sample was taken from the wooden support on which the urn with the bones of the deceased and bronze jewellery was placed. The date obtained corresponds to the 14th century B.C. and confirms earlier proposed suppositions concerning the chronological determination of the necropolises from the territory of Jadar, Podgorina and Lower Podrinje. [Projekat Ministarstva nauke Republike Srbije, br. OI177020: Archaeology of Serbia: cultural identity, integration factors, technological processes and the role of Central Balkans in the development of European prehistory

  6. XRF and micro-PIXE studies of inhomogeneity of ancient bronze and silver alloys

    Science.gov (United States)

    Vasilescu, A.; Constantinescu, B.; Stan, D.; Talmatchi, G.; Ceccato, D.

    2017-09-01

    New results regarding alloy composition and microstructure for a series of ancient bronze and silver items by X-ray Fluorescence and micro-Particle Induced X-ray Emission spectrometry were obtained in the framework of an extensive numismatic project (Scythian-type arrowheads, arrowhead-shaped monetary signs and wheel coins produced by Histria, 7th-4th century of BCE, and Dacian Radulesti-Hunedoara-type silver tetradrachms, 2nd-1st century of BCE). In Histria, warfare arrowheads were used for trade with Barbarian neighbors at first, then mechanically modified, next melted and cast as dedicated monetary signs, being, in the end, replaced by wheel coins. Three different types of alloys have been identified, and Cu-Mn and Cu-Pb segregation shown. In a blank for Radulesti-Hunedoara-type coins, Ag-(Cu+Pb) segregation has been demonstrated, suggesting an imperfectly alloyed silver-leaded bronze.

  7. CHARACTERIZATION OF SHORT E-GLASS FIBER REINFORCEDGRAPHITE AND BRONZE FILLED EPOXY MATRIX COMPOSITES

    Directory of Open Access Journals (Sweden)

    N. Patil

    2016-03-01

    Full Text Available The mechanical characterization of short E- glass fiber reinforced, graphite and sintered bronze filled epoxy composite was carried out in this study. The aim of the present study was to develop tribological engineering material. In this study the flexural strength, theoretical and experimental density, Hardness and Impact strength of composites was investigated experimentally. The results showed that the increased percentage of graphite (10 to 15%Vol and Eglass fiber (10 to 15%Vol enhanced flexural strength (149 MPa of the composite and the maximum flexural modulus (13.3 GPa and 13.1 GPa was obtained for composite C2 and C5 respectively. Maximum hardness (84 on L scale and impact energy (90 Joule was obtained for the composite C6 with increased percentage of glass fiber and graphite filler. The metallurgical electron microscopic images were discussed to interpret the effect of graphite and sintered bronze on mechanical characterization of composite

  8. Cold spraying of aluminum bronze on profiled submillimeter cermet structures formed by laser cladding

    Science.gov (United States)

    Ryashin, N. S.; Malikov, A. G.; Shikalov, V. S.; Gulyaev, I. P.; Kuchumov, B. M.; Klinkov, S. V.; Kosarev, V. F.; Orishich, A. M.

    2017-10-01

    The paper presents results of the cold spraying of aluminum bronze coatings on substrates profiled with WC/Ni tracks obtained by laser cladding. Reinforcing cermet frames shaped as grids with varied mesh sizes were clad on stainless steel substrates using a CO2 laser machine "Siberia" (ITAM SB RAS, Russia). As a result, surfaces/substrates with heterogeneous shape, composition, and mechanical properties were obtained. Aluminum bronze coatings were deposited from 5lF-NS powder (Oerlikon Metco, Switzerland) on those substrates using cold spraying equipment (ITAM SB RAS). Data of profiling, microstructure diagnostics, EDS analysis, and mechanical tests of obtained composites is reported. Surface relief of the sprayed coatings dependence on substrate structure has been demonstrated.

  9. Archaeometallurgical Characterization of Some Ancient Copper and Bronze Artifacts from Albania

    Science.gov (United States)

    Dilo, T.; Civici, N.; Stamati, F.; Cakaj, O.

    2010-01-01

    Ancient copper and bronze artifacts from different Albanian archaeological sites have been analyzed by X-ray-fluorescence analysis to determine the type of alloy and elemental composition and by Optical Microscopy for the investigation of corrosion products and microstructure of the bulk metal. Three bronze coins excavated in Dyrrahu, dating to the IIIrd-IInd century B.C, are composed of copper, tin and lead. Both studied nails, one excavated in Dyrrahu (IVrth-IIIrd century B.C), and the other one found inside an amphora in a ancient ship close to the coast of Saranda (VIth-IVrth century B.C), are composed of copper. The strata-graphical morphology and microstructure images from microscopic examinations allowed us to identify different corrosion products and the diverse stages of metallurgical and mechanical treatment during their manufacture.

  10. STUDENTI MARCO POLO-TURANDOT E STRATEGIE DI ASCOLTO: UNO STUDIO SUL QUESTIONARIO MALQ

    Directory of Open Access Journals (Sweden)

    Ambra Ferranti

    2017-03-01

    Full Text Available Il presente studio-pilota indaga gli effetti che una ripetuta somministrazione del MALQ (Metacognitive Awareness Listening Questionnaire può avere sulla consapevolezza metacognitiva e l’abilità di comprensione orale: il campione è costituito da un gruppo di studenti sinofoni di italiano L2. Lo studio è stato svolto presso il CALCIF – Università degli Studi di Milano e gli studenti partecipanti allo studio, 15 studenti sinofoni del progetto Marco Polo e Turandot, sono stati divisi in Gruppo Sperimentale (corrispondente alla classe A, n=9 e Gruppo di Controllo (corrispondente alla classe B, n=6. Il gruppo sperimentale è stato sottoposto al trattamento MALQ per la durata di un mese, partecipando 2 volte alla settimana a sessioni speciali di attività di ascolto. Durante le sessioni gli studenti hanno compilato il questionario MALQ sulle strategie metacognitive attivate durante l’ascolto. Il gruppo di controllo non ha ricevuto il trattamento e ha partecipato solo al test iniziale e al test finale. I risultati dello studio mostrano che il gruppo sperimentale ha beneficiato del trattamento MALQ in modo statisticamente significativo. Marco Polo-Turandot students and listening strategies: a study of the MALQ questionnaire This pilot study investigates the effects that the repeated administration of MALQ (Metacognitive Awareness Listening Questionnaire can have on metacognitive awareness and listening skills. The sample consists of a group of Chinese students of Italian L2. The study was carried out at CALCIF – Università degli Studi di Milano and 15 Chinese students involved in the study, participants in the Marco Polo and Turandot projects, were divided into the experimental group (9 students in Class A and the control group (Class B, 6 students. The experimental group underwent MALQ treatment for a period of one month, 2 times a week during special listening activity sessions. During the sessions, the students completed the MALQ

  11. L'apparition de l’écriture dans le monde égéen a l’Age du Bronze

    Directory of Open Access Journals (Sweden)

    René Treuil

    1999-12-01

    Full Text Available Este artigo tem por objetivo focalizar as etapas que levaram ao aparecimento da escrita, no mundo egeu, bem como discutir suas possíveis causas. O Neolítico presencia a passagem da marca simples, herdada do Paleolítico, ao verdadeiro signo, escrito sobre um tablete ou uma plaqueta, não tendo as pintaderas e as assim chamadas “pré-escritas” nada, provavelmente, a ver com esse fato. O Bronze Antigo, adotando o selo como instrumento de controle, associa o signo ao utensílio e, com as marcas de ceramista, utiliza o primeiro sistema de notação conhecido na região. Com o aparecimento do sistema palaciano, Creta amplia as utilizações precedentes e lhes acrescenta um segundo sistema de notação, representado pelas marcas de pedreiro; adota sobretudo, porem, a escrita hieroglífica, e, em seguida, a linear A para as necessidades da contabilidade palaciana e privada.

  12. Hittites and "barbarians" in the Late Bronze Age: regional survey in northern Turkey

    Directory of Open Access Journals (Sweden)

    Roger Matthews

    1999-11-01

    Full Text Available The Hittites have attracted less attention from British archaeologists than other Bronze Age states of ancient Southwest Asia, and yet in the second millennium BC they controlled most of Anatolia and at the peak of their power they even conquered Babylon. Here the Director of the British Institute of Archaeology at Ankara describes new research on the northwest frontier of the Hittite empire.

  13. Ancient bronze coins from Mediterranean basin: LAMQS potentiality for lead isotopes comparative analysis with former mineral

    Energy Technology Data Exchange (ETDEWEB)

    Torrisi, L., E-mail: Lorenzo.Torrisi@unime.it [Department of Physics Science - MIFT, Messina University, V.le F.S. d’Alcontres 31, 98166 S. Agata, Messina (Italy); Italiano, A. [INFN, Sezione di Catania, Gruppo collegato di Messina (Italy); Torrisi, A. [Institute of Optoelectronics, Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw (Poland)

    2016-11-30

    Highlights: • Surface and bulk compositional elements in ancient bronze coins were investigated using XRF analysis. • Lead stable isotope {sup 204}Pb, {sup 206}Pb, {sup 207}Pb and {sup 208}Pb were measured in ancient coins with LAMQS analysis. • Lead ratios {sup 208}Pb/{sup 206}Pb and {sup 207}Pb/{sup 206}Pb, measured by LAMQS, were compared with Brettscaife.net geological database relative to the minerals in different mines of Mediterranean basin. • Bronze coins were correlated to possible ancient mining sites of minerals from which lead was extracted. - Abstract: Bronze coins coming from the area of the Mediterranean basin, dated back the II–X Cent. A.D., were analyzed using different physical analytical techniques. Characteristic X-ray fluorescence was used with electrons and photons, in order to investigate the elemental composition of both the surface layers and bulk. Moreover, the quadrupole mass spectrometry coupled to laser ablation (LAMQS technique) in high vacuum was used to analyse typical material compounds from surface contamination. Mass spectrometry, at high resolution and sensitivity, extended up to 300 amu, allowed measuring the {sup 208}Pb/{sup 206}Pb and {sup 207}Pb/{sup 206}Pb isotopic ratios into the coins. Quantitative relative analyses of these isotopic ratios identify the coin composition such as a “fingerprint” depending on the mineral used to extract the lead. Isotopic ratios in coins can be compared to those of the possible minerals used to produce the bronze alloy. A comparison between the measured isotope ratios in the analyzed coins and the literature database, related to the mineral containing Pb as a function of its geological and geophysical extraction mine, is presented. The analysis, restricted to old coins and the mines of the Mediterranean basin, indicates a possible correlation between the coin compositions and the possible geological sites of the extracted mineral.

  14. Human paleodiet and animal utilization strategies during the Bronze Age in northwest Yunnan Province, southwest China.

    Directory of Open Access Journals (Sweden)

    Lele Ren

    Full Text Available Reconstructing ancient diets and the use of animals and plants augment our understanding of how humans adapted to different environments. Yunnan Province in southwest China is ecologically and environmentally diverse. During the Neolithic and Bronze Age periods, this region was occupied by a variety of local culture groups with diverse subsistence systems and material culture. In this paper, we obtained carbon (δ13C and nitrogen (δ15N isotopic ratios from human and faunal remains in order to reconstruct human paleodiets and strategies for animal exploitation at the Bronze Age site of Shilinggang (ca. 2500 Cal BP in northwest Yunnan Province. The δ13C results for human samples from Shilinggang demonstrate that people's diets were mainly dominated by C3-based foodstuffs, probably due to both direct consumption of C3 food and as a result of C3 foddering of consumed animals. Auxiliary C4 food signals can also be detected. High δ15N values indicate that meat was an important component of the diet. Analysis of faunal samples indicates that people primarily fed pigs and dogs with human food waste, while sheep/goats and cattle were foddered with other food sources. We compare stable isotope and archaeobotanical data from Shilinggang with data from other Bronze Age sites in Yunnan to explore potential regional variation in subsistence strategies. Our work suggests that people adopted different animal utilization and subsistence strategies in different parts of Yunnan during the Bronze Age period, probably as local adaptations to the highly diversified and isolated environments in the region.

  15. Neolithic and Bronze Age migration to Ireland and establishment of the insular Atlantic genome.

    Science.gov (United States)

    Cassidy, Lara M; Martiniano, Rui; Murphy, Eileen M; Teasdale, Matthew D; Mallory, James; Hartwell, Barrie; Bradley, Daniel G

    2016-01-12

    The Neolithic and Bronze Age transitions were profound cultural shifts catalyzed in parts of Europe by migrations, first of early farmers from the Near East and then Bronze Age herders from the Pontic Steppe. However, a decades-long, unresolved controversy is whether population change or cultural adoption occurred at the Atlantic edge, within the British Isles. We address this issue by using the first whole genome data from prehistoric Irish individuals. A Neolithic woman (3343-3020 cal BC) from a megalithic burial (10.3× coverage) possessed a genome of predominantly Near Eastern origin. She had some hunter-gatherer ancestry but belonged to a population of large effective size, suggesting a substantial influx of early farmers to the island. Three Bronze Age individuals from Rathlin Island (2026-1534 cal BC), including one high coverage (10.5×) genome, showed substantial Steppe genetic heritage indicating that the European population upheavals of the third millennium manifested all of the way from southern Siberia to the western ocean. This turnover invites the possibility of accompanying introduction of Indo-European, perhaps early Celtic, language. Irish Bronze Age haplotypic similarity is strongest within modern Irish, Scottish, and Welsh populations, and several important genetic variants that today show maximal or very high frequencies in Ireland appear at this horizon. These include those coding for lactase persistence, blue eye color, Y chromosome R1b haplotypes, and the hemochromatosis C282Y allele; to our knowledge, the first detection of a known Mendelian disease variant in prehistory. These findings together suggest the establishment of central attributes of the Irish genome 4,000 y ago.

  16. Friction stir processing of nickel aluminum propeller bronze in comparison to fusion welds

    OpenAIRE

    Murray, David L.

    2005-01-01

    Friction Stir Processing (FSP) is currently being considered for use in manufacture of the Navy's NiAl bronze propellers. Incorporating this technology may improve service performance and enable reduction of manufacturing time and cost. This program of research has employed miniature tensile sample designs to examine the distributions of longitudinal properties through the various regimes in a fusion weld. Also, the distributions of both longitudinal and transverse properties throughout t...

  17. Middle and Late Bronze Age settlement on the South Downs: the case study of Black Patch

    OpenAIRE

    Tapper, Richard Quinn

    2012-01-01

    By integrating the corpus of existing knowledge with new information gained by applying geo-archaeological techniques as well as more traditional techniques to fresh archaeological investigations at Black Patch and elsewhere, the aims of the research are to look at the economy, social organization and ritual behaviour of life in the Middle and Late Bronze Age on the South Downs in the light of modern archaeological theory to consider the questions ‘Why were these areas chosen for settlement?’...

  18. Compositional analyses of a Reutlingen Bronze Age sword discovered at Giurgiu, Romania

    OpenAIRE

    Olariu, Agata; Alexandrescu, Emilian; Avram, Alexandru; Badica, Teodor

    2003-01-01

    The compositional scheme of a Bronze Age sword, found near the town of Giurgiu in Romania has been determined by the method of particle-induced X-ray emission (PIXE), at the tandem accelerator of the National Institute for Physics and Nuclear Engineering from Bucharest, Magurele, Romania. The results of the analyses and the comparison with the composition of other swords from the same geographic area, the Danubian plane from Bulgaria and Transylvania regions, show that the sword from Giurgiu ...

  19. Journey to murder. Atypical graves of immigrants in the Early Bronze Age Europe.

    OpenAIRE

    Pokutta, Dalia

    2014-01-01

    Migrations had important effects on Bronze Age economy, adaptation of new inventions and technological cohesion, however their impact upon society remains under-studied. The knowledge of how individual longdistance mobility affected various forms of societal interaction is limited and fragmented, especially when it comes to murder. In archaeology the analyses of criminality encounter massive obstacles due to unknowable character of crimes, victims and social contexts of these. In this paper w...

  20. Fast polarization mechanisms in the uniaxial tungsten-bronze relaxor strontium barium niobate SBN-81

    Czech Academy of Sciences Publication Activity Database

    Buixaderas, Elena; Kadlec, Christelle; Kempa, Martin; Bovtun, Viktor; Savinov, Maxim; Bednyakov, Petr; Hlinka, Jiří; Dec, J.

    2017-01-01

    Roč. 7, Dec (2017), s. 1-11, č. článku 18034. ISSN 2045-2322 R&D Projects: GA ČR GA16-09142S; GA MŠk(CZ) LD15014 Institutional support: RVO:68378271 Keywords : relaxor * tungsten-bronzes * dielectric response * phonons * broad-band spectroscopy Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 4.259, year: 2016

  1. Characterisation of artificial patinas on bronze sculptures of the Carlo Bilotti Museum (Rome)

    Science.gov (United States)

    Casanova Municchia, A.; Bellatreccia, F.; D'Ercoli, G.; Lo Mastro, S.; Reho, I.; Ricci, M. A.; Sodo, A.

    2016-12-01

    Two bronze sculptures, Ettore e Andromaca, a reproduction of a plaster model by Giorgio de Chirico, and Cardinale, a cast made from an original by Giacomo Manzù, stand outside the Carlo Bilotti contemporary art museum in Villa Borghese park (Rome). The composition of the artificial brown patina present on the statues' surface, which was applied for aesthetic purposes, is unknown. This paper reports analysis carried out to identify the composition of the artificial patina and describe the corrosion products formed in outdoor conditions. Raman spectroscopy and scanning electron microscopy equipped with X-ray microanalysis were performed on sample fragments and powder scrapings taken from the bronze statues. X-ray powder diffraction was used whenever possible and subject to conservation priorities. Our data revealed, in the artificial brown patina, the formation of copper oxides (cuprite and tenorite) on the surface of both sculptures as possible result of oxidisation treatments performed with a blowtorch before the artificial patination process began. Furthermore, a copper nitrate (gerhardtite) was identified as an ingredient in the preparation applied to the bronze surfaces. The green areas revealed the presence of corrosion products as copper sulphate hydroxide (brochantite) and copper sulphate-chloride (connellite), which form under acid rains conditions.

  2. Analysis of the Quintilii’s Villa Bronzes by Spectroscopy Techniques

    Directory of Open Access Journals (Sweden)

    Fabio Stranges

    2014-01-01

    Full Text Available The aim of this work is the characterization, with different diagnostic tests, of three fragments of bronze artefacts recovered from the Villa of the Quintilii (located in the south of Rome. In particular, the sample alloys were investigated by different chemical and morphological analysis. Firstly, an analysis of the alloy, implemented through the electronic spectroscopy, was taken to discriminate the bronze morphology and its elemental composition. Subsequently, a surface analysis was realized by molecular spectroscopy to identify the alteration patinas on surfaces (such as bronze disease. Two diagnostic techniques are used for the alloy analysis: scanning electron microscopy (SEM connected to the EDX spectroscopy (to study the morphology and alloy composition and Auger electron spectroscopy (AES (to identify the oxidation state of each element. Moreover, for the study of surface patinas, IR and Raman spectroscopies were implemented. All studies were performed on the “as received” samples, covered by a thin layer of excavated soil and on samples processed in an aqueous solution of sulphuric acid (10%, to remove patinas and alterations.

  3. Improvement of viscoelastic damping in nickel aluminum bronze by indium-tin

    Science.gov (United States)

    Lee, Taeyong

    2011-06-01

    Reduction of the vibration noise from submarine propellers is of interest in naval operations. Such an objective can be achieved via the use of materials with the ability to dissipate energy of vibration by means of heat, i.e. high damping materials. An additional problem is that the extreme hydrostatic pressure environment of a submarine requires the chosen material to exhibit considerably high stiffness. Most materials demonstrate a compromise between the two properties, i.e. stiffness and damping. This paper aims to discuss research into high stiffness and high damping materials conducted using a dynamic mechanical analyzer (DMA) under variations of testing temperature, frequency, and strain amplitude. Alloys of nickel aluminum bronze and indium tin are the subjects of this study. Defect damping represents a large portion of the overall damping properties of the nickel aluminum bronze while increasing indium content is shown to boost the damping properties of the indium tin alloy. The study then continues with the development of a new material that combines both indium alloying and defects introduction into the nickel aluminum bronze alloy. The new alloy is observed to have high damping, as measured in its high tan δ, with minimum reduction of the stiffness | E*|.

  4. Evaluation of the inhibitive effect of benzotriazole on archeological bronze in acidic medium

    Science.gov (United States)

    Hassairi, Hèla; Bousselmi, Latifa; Khosrof, Slim; Triki, Ezzeddine

    2013-12-01

    An archaeological bronze artefact was a Punic coin excavated from the north east of Tunisia in 2001. The composition of the copper alloy revealed a content of 3.5 % of tin and 1.4 % of lead with the presence of some sulphur heterogeneity. The surface presents some roughnesses and cracks and is covered by a corrosion layer of 20-40 μm thickness. The use of benzotriazole (BTA) as an inhibitor has become a standard element for the preservation of cuprous-based metals. In order to investigate the behaviour of BTA in an acidic medium, an Electrochemical Impedance Spectroscopy (EIS) investigation was performed to characterize the electrochemical behaviour of the interface of the archaeological bronze sample/acidic medium without and with BTA addition. Impedance diagrams obtained at different immersion times show that the presence of the inhibitor prevents the diffusional process observed in the absence of BTA. The inhibition of the pre-polarized bronze surface revealed that the mechanism of action of the benzotriazole molecule in an acidic medium is governed by the chemisorption process.

  5. High-pressure synthesis of fully occupied tetragonal and cubic tungsten bronze oxides

    Energy Technology Data Exchange (ETDEWEB)

    Ikeuchi, Yuya; Takatsu, Hiroshi; Tassel, Cedric; Goto, Yoshihiro; Murakami, Taito; Kageyama, Hiroshi [Graduate School of Engineering, Kyoto University (Japan)

    2017-05-15

    A high-pressure reaction yielded the fully occupied tetragonal tungsten bronze K{sub 3}W{sub 5}O{sub 15} (K{sub 0.6}WO{sub 3}). The terminal phase shows an unusual transport property featuring slightly negative temperature-dependence in resistivity (dρ/dT<0) and a large Wilson ratio of R{sub W}=3.2. Such anomalous metallic behavior possibly arises from the low-dimensional electronic structure with a van Hove singularity at the Fermi level and/or from enhanced magnetic fluctuations by geometrical frustration of the tungsten sublattice. The asymmetric nature of the tetragonal tungsten bronze K{sub x}WO{sub 3}-K{sub 0.6-y}Ba{sub y}WO{sub 3} phase diagram implies that superconductivity for x≤0.45 originates from the lattice instability because of potassium deficiency. A cubic perovskite KWO{sub 3} phase was also identified as a line phase - in marked contrast to Na{sub x}WO{sub 3} and Li{sub x}WO{sub 3} with varying quantities of x (<1). This study presents a versatile method by which the solubility limit of tungsten bronze oxides can be extended. (copyright 2017 Wiley-VCH Verlag GmbH and Co. KGaA, Weinheim)

  6. Feeding and Cooling and Time of Thermal Treatment of a Massive Bush Made of the Complex Aluminum Bronze Cast by the Lost Foam

    Directory of Open Access Journals (Sweden)

    Just P.

    2014-12-01

    Full Text Available Small additions of Cr, Mo and W to aluminium-iron-nickel bronze are mostly located in phases κi (i=II; III; IV,and next in phase α (in the matrix and phase γ2. They raise the temperature of the phase transformations in aluminium bronzes as well as the casts’ abrasive and adhesive wear resistance. The paper presents a selection of feeding elements and thermal treatment times which guarantees structure stability, for a cast of a massive bush working at an elevated temperature (650-750°C made by means of the lost foam technology out of composite aluminium bronze. So far, there have been no analyses of the phenomena characteristic to the examined bronze which accompany the process of its solidification during gasification of the EPS pattern. There are also no guidelines for designing risers and steel internal chill for casts made of this bronze. The work identifies the type and location of the existing defects in the mould’s cast. It also proposes a solution to the manner of its feeding and cooling which compensates the significant volume contraction of bronze and effectively removes the formed gases from the area of mould solidification. Another important aspect of the performed research was establishing the duration time of bronze annealing at the temperature of 750°C which guarantees stabilization of the changes in the bronze microstructure - stabilization of the changes in the bronze HB hardness.

  7. A systematic approach to Bronze corrosion products and the methods of treatment , applied on three bronze anklets from Dhamar museum , Yemen

    Directory of Open Access Journals (Sweden)

    Hazem Mohamed

    2014-04-01

    Full Text Available Three bronze anklets were found during the archaeological excavation of Yemeni mission 2002 A.D, in Gabal al- lawd , Jawf area , Yemen , they dated back to Minaean period in Yemen [sixth century B.C – 24 B.C] , and now they are situated in Dhamar regional museum .They were suffered from the deterioration aspects , two of these anklets had a thick corrosion products of pale green / brown , the third anklet had a rust-colored Black and Brown with the presence of small parts and scattered pale green. The aim of this paper is to examine, in detail, the corrosion of the selected objects that was grown during the long-term burial and identify its products that will help us to understand the corrosive factors and the degradation mechanisms , as well as their constituting metals in order to carry out scientific treatment and conservation .For this purpose ,samples from the objects were examined by Metallographic Microscope (ME , Scanning Electron Microscope (SEM, the corrosion products were analyzed by X-ray diffraction (XRD and X-ray fluorescence( XRF was used to determine the objects metallic constituents . XRD data showed that the corrosion products constitute of cuprite , atacamite , and paratacamite , whereas XRF analysis declared that the anklets compose of bronze alloy . Microscopic examination reveals that the three anklets were suffered from the deterioration spots , which dispersed on the metal surface . Chemical cleaning was chosen for treating the objects , finally they were isolated to preserve them against further attack.

  8. The scavenger receptor MARCO modulates TLR-induced responses in dendritic cells.

    Directory of Open Access Journals (Sweden)

    Haydn T Kissick

    Full Text Available The scavenger receptor MARCO mediates macrophage recognition and clearance of pathogens and their polyanionic ligands. However, recent studies demonstrate MARCO expression and function in dendritic cells, suggesting MARCO might serve to bridge innate and adaptive immunity. To gain additional insight into the role of MARCO in dendritic cell activation and function, we profiled transcriptomes of mouse splenic dendritic cells obtained from MARCO deficient mice and their wild type counterparts under resting and activating conditions. In silico analysis uncovered major alterations in gene expression in MARCO deficient dendritic cells resulting in dramatic alterations in key dendritic cell-specific pathways and functions. Specifically, changes in CD209, FCGR4 and Complement factors can have major consequences on DC-mediated innate responses. Notably, these perturbations were magnified following activation with the TLR-4 agonist lipopolysaccharide. To validate our in silico data, we challenged DC's with various agonists that recognize all mouse TLRs and assessed expression of a set of immune and inflammatory marker genes. This approach identified a differential contribution of MARCO to TLR activation and validated a major role for MARCO in mounting an inflammatory response. Together, our data demonstrate that MARCO differentially affects TLR-induced DC activation and suggest targeting of MARCO could lead to different outcomes that depend on the inflammatory context encountered by DC.

  9. Análisis del futuro marco de referencia internacional

    Science.gov (United States)

    Cionco, G. R.; Arias, E. F.

    La técnica de interferometría de muy larga línea de base (VLBI) se aplica hoy a la astrometría para el cálculo de posiciones precisas de radiofuentes extragalácticas. Por tratarse de objetos lejanos, sus movimientos propios aparentes pueden considerarse nulos; esta propiedad hace que los catálogos de radiofuentes extragalácticas VLBI constituyan la mejor materialización de un sistema de referencia celeste inercial definido cinemáticamente. La Unión Astronómica Internacional (IAU) recomendó la adopción de un nuevo sistema de referencia celeste internacional materializado por las coordenadas ecuatoriales de objetos extragalácticos observados con le técnica VLBI. Para superar la precisión astrométrica actual es necesaria una mejora en la modelización de aquellos fenómenos que pueden introducir desviaciones sistemáticas en el marco de referencia celeste. El objetivo de este trabajo es poner de manifiesto las sistematicidades presentes en los distintos marcos de referencia elaborados con el próposito de materializar el nuevo sistema de referencia celeste de la IAU. Para la comparación de los distintos marcos de referencia se propone un modelo de tres rotaciones diferenciales más un término lineal que procura absorber los efectos sistemáticos presentes en las coordenadas. Se analiza igualmente la estabilidad de la solución cuando se utilizan distintos conjuntos de objetos de definición.

  10. Physical Characterization of Asteroids Candidates of Marco Polo Mission

    Science.gov (United States)

    Birlan, Mirel; Binzel, R. P.; Nedelcu, D.; Vernazza, P.; Barucci, A.; Gasc, S.; Fulchignoni, M.; Dotto, E.

    2009-09-01

    The principal scientific objective of the Marco Polo mission is to return unaltered NEO materials. Marco Polo will allow us to analyze the samples in terrestrial laboratories, thereby obtaining measurements that cannot yet beperformed from a robotic spacecraft. The selection of the target asteroids for the mission has important consequences in terms of mission design, constraints, and operational requirements. A list of asteroids as possible targets for the Marco Polo mission has been drawn, taken into account both dynamical and physical constraints. The key parameters of this list were the accessibility of the object (the delta-V amount for the encounter with the target) and the desirable, primitive composition requirements of the target deduced from the groundbased data (mainly from colors and spectroscopy). While the accessibility is dealing with space technological achievements, the primitive composition of the target is oriented toward the research on asteroids belonging to D-, T-, or C-type classes. For some of the possible targets, the physical data are sparse and reveals only partial knowledge of these objects while for some of them no spectroscopic investigations are yet available in the IR spectral region. To improve the situation, observations of asteroids 1917, 8567, 16960, 156452, 163000, 164400, and 2001 SG286 were obtained using SpeX/IRTF in the 0.8-2.5µm spectral region. The analysis of their NIR spectra reveals that many of these objects belong to the S-type complex (DeMeo, Icarus 202, 2009). The exception is the asteroid 2001 SG286, for which the spectrum is flat, similar to C-complex. The analysis of slopes, band strengths, and the most probable mineralogical and meteorite analog models will be presented.

  11. Ley marco de aseguramiento universal en salud, bajo la lupa

    Directory of Open Access Journals (Sweden)

    Leoncio Díaz

    2009-04-01

    Full Text Available La Ley Marco de Aseguramiento Universal en Salud, concebida en el marco del modelo neoliberal conservador, excluyente y polarizante, fue aprobada en circunstancias en la que persisten grandes contrastes entre sistemas de salud. Por un lado, los países que mantienen subsistemas inconexos y privatizados y, por otro, los que unificados y bajo la responsabilidad del Estado, garantizan a todos el acceso integral, gratuito y de calidad a los servicios de salud. En América y el Caribe, existen países cuyos pobladores carecen de derechos y posibilidades, evidenciando las profundas inequidades que mantienen en exclusión a la mayoría pobre y de extrema pobreza, entre ellos, el Perú muestra indicadores de salud que aún se mantienen en cifras alarmantes y por debajo de los que presentan otras realidades en el mundo. En las últimas tres décadas hubo ensayos frustros de reformas, como la integración funcional del Ministerio de Salud con el Instituto Peruano de Seguridad Social, o el Sistema Nacional Coordinado y Descentralizado en Salud. Actualmente se formula la Ley Marco de Aseguramiento Universal, que mantiene los actuales subsistemas sin variación alguna y con sus propias autonomías, ensayando pilotos, estableciendo planes parciales, implementándola de manera progresiva, priorizando la privatización y debilitando la función rectora del Ministerio de Salud, al crear una superintendencia omnipotente, lo cual continuará permitiendo la exclusión social de más de 9 millones de peruanos. Existe, por tanto, la necesidad de plantear la unificación de los subsistemas, para construir un Sistema Único de Salud, capaz de otorgar salud plena, integral, de calidad y sin costo alguno al 100% de ciudadanos.

  12. The multidimensional evaluation and treatment of anxiety in children and adolescents: rationale, design, methods and preliminary findings Avaliação multidimensional e tratamento da ansiedade em crianças e adolescentes: marco teórico, desenho, métodos e resultados preliminares

    Directory of Open Access Journals (Sweden)

    Giovanni Abrahão Salum

    2011-06-01

    Full Text Available OBJECTIVE: This study aims to describe the design, methods and sample characteristics of the Multidimensional Evaluation and Treatment of Anxiety in Children and Adolescents - the PROTAIA Project. METHOD: Students between 10 and 17 years old from all six schools belonging to the catchment area of the Primary Care Unit of Hospital de Clínicas de Porto Alegre were included in the project. It comprises five phases: (1 a community screening phase; (2 a psychiatric diagnostic phase; (3 a multidimensional assessment phase evaluating environmental, neuropsychological, nutritional, and biological factors; (4 a treatment phase, and (5 a translational phase. RESULTS: A total of 2,457 subjects from the community were screened for anxiety disorders. From those who attended the diagnostic interview, we identified 138 individuals with at least one anxiety disorder (apart from specific phobia and 102 individuals without any anxiety disorder. Among the anxiety cases, generalized anxiety disorder (n = 95; 68.8%, social anxiety disorder (n = 57; 41.3% and separation anxiety disorder (n = 49; 35.5% were the most frequent disorders. CONCLUSION: The PROTAIA Project is a promising research project that can contribute to the knowledge of the relationship between anxiety disorders and anxiety-related phenotypes with several genetic and environmental risk factors.OBJETIVO: o objetivo deste estudo é descrever o desenho, os métodos e as características amostrais da Avaliação Multidimensional e Tratamento da Ansiedade em Crianças e Adolescentes - Projeto PROTAIA. MÉTODO: Escolares entre 10 e 17 anos de todas as escolas pertencentes à área de abrangência da unidade de atenção primária do Hospital de Clínicas de Porto Alegre foram incluídos no projeto. O projeto compreende cinco fases: 1 triagem comunitária; 2 diagnóstico psiquiátrico; 3 avaliação multidimensional, incluindo fatores ambientais, neuropsicológicos, nutricionais e marcadores biológicos; 4

  13. Como antigas estátuas de bronze

    Directory of Open Access Journals (Sweden)

    Oliver Lubrich

    2010-01-01

    Full Text Available A interpretação de América usando motivos classicistas como modelos imperiais de apropriação, "antiquização", é uma das principais estratégias retóricas nos relatos de viagens de Alexander von Humboldt, Relation historique du voyage aux régions équinoxiales du Nouveau Continent (1814-1831. A partir da experiência colonial, esse discurso está carregado de tensão. O conceito de antiguidade é, assim, desautorizado e desconstruído. Os leitores são testemunhas da dissolução do classicismo europeu como dispositivo político-estético produzido pela diferença cultural."Antiquifying" America is a central rhetorical strategy in Alexander von Humboldt's Relation historique du voyage aux régions équinoxiales du Nouveau Continent (1814-1831. Over the course of the colonial experience, tension infuses the discourse and problems in the use of classicist motifs as imperial models of appropriation become apparent: metaphoric and metonymic references collide; positive and negative connotations overlap; incompatible modes of temporalization contrast with one another; colonial and dissident identifications coincide. The concept of "antiquity" is de-authorized, deconstructed. Readers witness the dissolution of European classicism as a politico-aesthetic 'dispositif' due to the experience of cultural difference.

  14. MARCO POLO: near earth object sample return mission

    Science.gov (United States)

    Barucci, M. A.; Yoshikawa, M.; Michel, P.; Kawagushi, J.; Yano, H.; Brucato, J. R.; Franchi, I. A.; Dotto, E.; Fulchignoni, M.; Ulamec, S.

    2009-03-01

    MARCO POLO is a joint European-Japanese sample return mission to a Near-Earth Object. This Euro-Asian mission will go to a primitive Near-Earth Object (NEO), which we anticipate will contain primitive materials without any known meteorite analogue, scientifically characterize it at multiple scales, and bring samples back to Earth for detailed scientific investigation. Small bodies, as primitive leftover building blocks of the Solar System formation process, offer important clues to the chemical mixture from which the planets formed some 4.6 billion years ago. Current exobiological scenarios for the origin of Life invoke an exogenous delivery of organic matter to the early Earth: it has been proposed that primitive bodies could have brought these complex organic molecules capable of triggering the pre-biotic synthesis of biochemical compounds. Moreover, collisions of NEOs with the Earth pose a finite hazard to life. For all these reasons, the exploration of such objects is particularly interesting and urgent. The scientific objectives of MARCO POLO will therefore contribute to a better understanding of the origin and evolution of the Solar System, the Earth, and possibly Life itself. Moreover, MARCO POLO provides important information on the volatile-rich (e.g. water) nature of primitive NEOs, which may be particularly important for future space resource utilization as well as providing critical information for the security of Earth. MARCO POLO is a proposal offering several options, leading to great flexibility in the actual implementation. The baseline mission scenario is based on a launch with a Soyuz-type launcher and consists of a Mother Spacecraft (MSC) carrying a possible Lander named SIFNOS, small hoppers, sampling devices, a re-entry capsule and scientific payloads. The MSC leaves Earth orbit, cruises toward the target with ion engines, rendezvous with the target, conducts a global characterization of the target to select a sampling site, and delivers small

  15. FACULTAD DE INGENIERÍA INDUSTRIAL EN SAN MARCOS

    OpenAIRE

    Quispe Atúncar, Carlos A.; Docente UNMSM

    2014-01-01

    En 1957 la Universidad Nacional Mayor de San Marcos, con la finalidad de investigar los problemas humanos más urgentes planteados por la realidad económica y social del país, crea el Instituto de Relaciones Humanas y Productividad, para formar expertos en Personal, en Administración, en Análisis de Costos y Mercado y en Relaciones de Trabajo. En 1960 el Instituto se convierte en Escuela Superior de Graduados de la Facultad de Ciencias Económicas, para formar expertos en Relaciones Públ...

  16. Corrosion investigation of fire-gilded bronze involving high surface resolution spectroscopic imaging

    Energy Technology Data Exchange (ETDEWEB)

    Masi, G., E-mail: giulia.masi5@unibo.it [Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali, Università di Bologna, via Terracini 28, 40131 Bologna (Italy); Chiavari, C., E-mail: cristina.chiavari@unibo.it [Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali, Università di Bologna, via Terracini 28, 40131 Bologna (Italy); C.I.R.I. (Centro Interdipartimentale Ricerca Industriale) Meccanica Avanzata e Materiali, Università di Bologna, Bologna, via Terracini 28, 40131 Bologna (Italy); Avila, J., E-mail: jose.avila@synchrotron-soleil.fr [Synchrotron SOLEIL, L’Orme des Merisiers, 91190 Saint-Aubin (France); Esvan, J., E-mail: jerome.esvan@ensiacet.fr [Centre Interuniversitaire de Recherche et d’Ingénierie des Matériaux, Université de Toulouse, 4 allée Emile Monso, 31030 Toulouse (France); Raffo, S., E-mail: simona.raffo2@unibo.it [Dipartimento di Chimica Industriale “Toso Montanari”, Università di Bologna, viale Risorgimento 4, 40136 Bologna (Italy); Bignozzi, M.C., E-mail: maria.bignozzi@unibo.it [Dipartimento di Ingegneria Civile, Chimica, Ambientale e dei Materiali, Università di Bologna, via Terracini 28, 40131 Bologna (Italy); Asensio, M.C., E-mail: maria-carmen.asensio@synchrotron-soleil.fr [Synchrotron SOLEIL, L’Orme des Merisiers, 91190 Saint-Aubin (France); Robbiola, L., E-mail: robbiola@univ-tlse2.fr [TRACES Lab (CNRS UMR5608), Université Toulouse Jean-Jaurès, 5, allées Antonio-Machado, 31058 Toulouse (France); and others

    2016-03-15

    Graphical abstract: - Highlights: • Fire-gilded bronze prepared by ancient methods (Au–Hg layer on Cu–Sn–Zn–Pb–Sb). • Heating during gilding induces Sn and Znenrichment in the top part of the gilded layer. • SR-HRPES mapping of corrosion craters (cross-section) after accelerated ageing. • Selective dissolution of Cu and Zn in the craters induces Sn species enrichment. • The main species in the craters are related to hydroxi-oxide compounds. - Abstract: Gilded bronzes are often affected by severe corrosion, due to defects in the Au layer and Au/Cu alloy galvanic coupling, stimulated by large cathodic area of the gilded layer. Galvanic corrosion, triggered by gilding defects, leads to products growth at the Au/bronze interface, inducing blistering or break-up of the Au layer. In this context, fire-gilded bronze replicas prepared by ancient methods (use of spreadable Au–Hg paste) was specifically characterised by compiling complementary spectroscopic and imaging information before/after accelerated ageing with synthetic rain. Fire-gilded bronze samples were chemically imaged in cross-section at nano-metric scale (<200 nm) using high energy and lateral resolution synchrotron radiation photoemission (HR-SRPES) of core levels and valence band after conventional characterisation of the samples by Glow Discharge optical Emission Spectroscopy (GD-OES) and conventional X-ray photoelectron spectroscopy (XPS). We have found a net surface enrichment in Zn and Sn after fire-gilding and presence of metallic Hg, Pb and Cu within the Au layer. Moreover, the composition distribution of the elements together with their oxidation has been determined. It was also revealed that metallic phases including Hg and Pb remain in the gilding after corrosion. Moreover, selective dissolution of Zn and Cu occurs in the crater due to galvanic coupling, which locally induces relative Sn species enrichment (decuprification). The feasibility advantages and disadvantages of

  17. Observações sôbre o bronzeado do algodoeiro Mocó Observations on bronzing of the Mocó cotton

    Directory of Open Access Journals (Sweden)

    A. S. Costa

    1955-01-01

    Full Text Available Uma anomalia do algodoeiro Mocó, denominada bronzeado, vem sendo observada na região do Seridó, Rio Grande do Norte, durante os últimos três anos. Pensou-se, a princípio, que esta anomalia fôsse causada por um vírus, mas as observações relatadas neste trabalho indicam que é causada por um ácaro. As fôlhas das plantas afetadas, especialmente aquelas da metade superior dos galhos, mostram uma coloração bronzeada no lado de baixo. Essa face da fôlha tem também uma superfície rugosa, com brilho vidrado (est. 1, B, as vezes com pequenas áreas de tecido cicatricial. Vistas pelo lado de cima são mais rugosas do que as normais e têm os bordos curvados para baixo. Nos casos graves, as fôlhas do topo dos galhos morrem e caem (est. 2, A e B. A espécie de ácaro causadora do bronzeado do algodoeiro Mocó foi identificada por H. H. Keifer, Sacramento, Calif., como pertencente a um gênero ainda não descrito da família Eriophyidae. Esta espécie está sendo presentemente denominada Anthocoptes sp. até que a sua descrição seja publicada. Populações de 500 a 1.000 indivíduos por centímetro quadrado de fôlha já foram encontradas. Esse ácaro parece ser muito sensível às condições do ambiente, visto que as populações da praga variam entre grandes limites.For the last three years a bronzing anomaly of cotton plants of the Mocó variety (Gossypium hirsutum L. var. maria galante Hutch. has been recorded in the Seridó region (a semi-arid region in the north-eastern part of Brazil, state of Rio Grande do Norte. This anomaly was first thought to be of virus origin, but the observations reported in this paper indicated that it is due to the attack by a species of mite. Leaves from affected plants, especially those on the upper half of the branches, show a bronzing discoloration on the dorsal side, frequently accompanied by a rough and ventral side of these leaves shows some rugosity not present in normal leaves, and in most cases

  18. La competencia federal en el marco del amparo en salud

    Directory of Open Access Journals (Sweden)

    Agustín Carignani

    2016-03-01

    Full Text Available El presente trabajo estudia la competencia federal en el marco de las acciones de amparo en salud, también conocidas como bioamparos. Para ello, se toman los conceptos y principios que rigen la competencia federal para luego verlos plasmados en las sentencias judiciales analizadas. Se verán fallos paradigmáticos en cuanto a las interpretaciones judiciales y como estas interpretaciones buscan en definitiva salvaguardar el derecho a la salud y su correlativo derecho a la vida. El objetivo de este trabajo es analizar en los distintos casos jurisprudenciales propuestos, la competencia federal de los amparos en salud. Para ello partiremos de los conceptos y normas que determinan la competencia federal, y desde allí analizar los casos propuestos. En este orden de ideas, se partirá de la doctrina predominante de competencia federal, sus características y se expondrá una referencia breve de la competencia ratione materiae y ratione personae para establecer el marco teórico del análisis de los casos jurisprudenciales analizados.

  19. Critical Role of MARCO in Crystalline Silica–Induced Pulmonary Inflammation

    OpenAIRE

    Thakur, Sheetal A.; Beamer, Celine A.; Migliaccio, Christopher T.; Holian, Andrij

    2009-01-01

    Chronic exposure to crystalline silica can lead to the development of silicosis, an irreversible, inflammatory and fibrotic pulmonary disease. Although, previous studies established the macrophage receptor with collagenous structure (MARCO) as an important receptor for binding and uptake of crystalline silica particles in vitro, the role of MARCO in regulating the inflammatory response following silica exposure in vivo remains unknown. Therefore, we determined the role of MARCO in crystalline...

  20. {sup 14}C dating of the Early to Late Bronze Age stratigraphic sequence of Aegina Kolonna, Greece

    Energy Technology Data Exchange (ETDEWEB)

    Wild, E.M., E-mail: Eva.Maria.Wild@univie.ac.a [VERA Laboratory, Faculty of Physics - Isotope Research, University of Vienna, Waehringer Strasse 17, A-1090 Wien (Austria); Gauss, W. [Austrian Archaeological Institute at Athens, Leof. Alexandras 26, Gr10683 Athens (Greece); Forstenpointner, G. [University of Veterinary Medicine Vienna, Dept. of Pathobiology, Institute of Anatomy, Unit on Archaeozoology and Comparative Morphology, Veterinaerplatz 1, A-1210 Vienna (Austria); Lindblom, M. [Dept. of Archaeology and Ancient History Uppsala, University Box 626, SE-751 26 Uppsala (Sweden); Smetana, R. [Altertumswissenschaften, University of Salzburg, Residenzplatz 1/I, A-5020 Salzburg (Austria); Steier, P. [VERA Laboratory, Faculty of Physics - Isotope Research, University of Vienna, Waehringer Strasse 17, A-1090 Wien (Austria); Thanheiser, U. [Vienna Institute for Archaeological Science (VIAS), Althanstrasse 14, A-1090 Vienna (Austria); Weninger, F. [VERA Laboratory, Faculty of Physics - Isotope Research, University of Vienna, Waehringer Strasse 17, A-1090 Wien (Austria)

    2010-04-15

    Aegina Kolonna, located in the center of the Saronic Gulf in the Aegean Mediterranean (Greece), is one of the major archaeological sites of the Aegean Bronze Age with a continuous stratigraphic settlement sequence from the Late Neolithic to the Late Bronze Age. Due to its position next to the maritime cross roads between central mainland Greece, the northeast Peloponnese, the Cyclades and Crete, the island played an important role in the trade between these regions. In the course of new excavations, which focused on the exploration of the Early, Middle and Late Bronze Age at Kolonna, several short lived samples from different settlement phases have been {sup 14}C-dated with the AMS method at the VERA laboratory. Bayesian sequencing of the {sup 14}C data according to the stratigraphic position of the samples in the profile was performed to enable estimates of the transition time between the cultural phases. The Aegina Kolonna {sup 14}C sequence is one of the longest existing so far for the Aegean Bronze Age, and therefore of major importance for the absolute Bronze Age chronology in this region. Preliminary results indicate that the Middle Helladic period seems to have started earlier and lasted longer than traditionally assumed. Further, at the present stage of our investigation we can give also a very tentative time frame for the Santorini volcanic eruption which seems to be in agreement with the science derived VDL date.

  1. Sobre la etnografía medieval : el oriente de Marco Polo y Juan de Mandevilla

    OpenAIRE

    Aníbal A. Biglieri

    2012-01-01

    Este artículo estudia la visión del Oriente en las traducciones al aragonés de los libros de Marco Polo y John Mandeville. En particular, se analizan el Oriente y sus muchedumbres, las “nuevas maravillas" de Marco Polo y las maravillas etnográficas de Juan de Mandevilla. This article analyzes the image of the Orient in the aragonese translations of the books by Marco Polo and John Mandeville. In particular, it focuses on the multitudes, the “new marvels" by Marco Polo and the ethnographic ...

  2. Pioneering farmers cultivating new lands in the North – The expansion of agrarian societies during the Neolithic and Bronze Age in Scandinavia

    DEFF Research Database (Denmark)

    Sørensen, Lasse

    2012-01-01

    Pioneering farmers cultivating new lands in the North – The expansion of agrarian societies during the Neolithic and Bronze Age in Scandinavia......Pioneering farmers cultivating new lands in the North – The expansion of agrarian societies during the Neolithic and Bronze Age in Scandinavia...

  3. Critical role of MARCO in crystalline silica-induced pulmonary inflammation.

    Science.gov (United States)

    Thakur, Sheetal A; Beamer, Celine A; Migliaccio, Christopher T; Holian, Andrij

    2009-04-01

    Chronic exposure to crystalline silica can lead to the development of silicosis, an irreversible, inflammatory and fibrotic pulmonary disease. Although, previous studies established the macrophage receptor with collagenous structure (MARCO) as an important receptor for binding and uptake of crystalline silica particles in vitro, the role of MARCO in regulating the inflammatory response following silica exposure in vivo remains unknown. Therefore, we determined the role of MARCO in crystalline silica-induced pulmonary pathology using C57Bl/6 wild-type (WT) and MARCO(-/-) mice. Increased numbers of MARCO(+) pulmonary macrophages were observed following crystalline silica, but not phosphate-buffered saline and titanium dioxide (TiO(2)), instillation in WT mice, highlighting a specific role of MARCO in silica-induced pathology. We hypothesized that MARCO(-/-) mice will exhibit diminished clearance of silica leading to enhanced pulmonary inflammation and exacerbation of silicosis. Alveolar macrophages isolated from crystalline silica-exposed mice showed diminished particle uptake in vivo as compared with WT mice, indicating abnormalities in clearance mechanisms. Furthermore, MARCO(-/-) mice exposed to crystalline silica showed enhanced acute inflammation and lung injury marked by increases in early response cytokines and inflammatory cells compared with WT mice. Similarly, histological examination of MARCO(-/-) lungs at 3 months post-crystalline silica exposure showed increased chronic inflammation compared with WT; however, only a small difference was observed with respect to development of fibrosis as measured by hydroxyproline content. Altogether, these results demonstrate that MARCO is important for clearance of crystalline silica in vivo and that the absence of MARCO results in exacerbations in innate pulmonary immune responses.

  4. Marcos interpretativos, identidad e imaginario en el mexica movement

    Directory of Open Access Journals (Sweden)

    Aquiles Chihu Amparán

    2007-01-01

    Full Text Available El objetivo de este artículo es analizar el mexica movement, a través de su discurso e imaginario, representados en un conjunto de utopías, símbolos, mitos y creencias, que revitalizan la cultura y el pasado mesoamericano. Se aplica la metodología del análisis de los marcos (frame analysis, con sus cinco partes: el protagonista, el problema, el antagonista, las metas y la audiencia. En el estudio de los movimientos sociales ha prevalecido el análisis de los aspectos políticos y estructurales, aquí a dichos movimientos se les observa en función de sus capacidades como productores de significados, que contribuyen a conformar su identidad colectiva.

  5. La lectura hipermedial. Hacia un marco teórico

    Directory of Open Access Journals (Sweden)

    Zamora Suárez, Liliana

    2016-02-01

    Full Text Available El objetivo de este trabajo es establecer el marco teórico hacia un aprendizaje significativo durante la lectura hipermedial teniendo en cuenta los procesos cognitivos que se ponen en marcha en el transcurso de la práctica lectora. El texto hipermedial se caracteriza por su falta de linealidad y por un lenguaje enriquecido con imágenes, vídeos y sonidos lo que puede causar sobrecarga en la memoria de trabajo, atención dividida y falta de coherencia afectando, en definitiva, la comprensión lectora. Por tanto, es preciso seleccionar los documentos de forma adecuada, así como instruir al aprendiente en estrategias lectoras y de gestión digital que le permitan llevar a cabo la lectura de forma reflexiva y consciente para llegar a un aprendizaje significativo.

  6. Evolution of microstructure and grain boundary character distribution of a tin bronze annealed at different temperatures

    Energy Technology Data Exchange (ETDEWEB)

    Huang, Weijiu [College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054 (China); Chongqing Municipal Key Laboratory of Institutions of Higher Education for Mould Technology, Chongqing University of Technology, Chongqing 400054 (China); Chai, Linjiang, E-mail: chailinjiang@cqut.edu.cn [College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054 (China); Chongqing Municipal Key Laboratory of Institutions of Higher Education for Mould Technology, Chongqing University of Technology, Chongqing 400054 (China); Li, Zhijun; Yang, Xusheng [College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054 (China); Guo, Ning; Song, Bo [Faculty of Materials and Energy, Southwest University, Chongqing 400715 (China)

    2016-04-15

    Specimens cut from a rolled tin bronze sheet were annealed at 400–800 °C for 1 h and evolution of their microstructures was then characterized in details by electron channeling contrast imaging and electron backscatter diffraction techniques. Particularly, statistics on special boundaries (SBs) with Σ ≤ 29 and network connectivity of random high angle boundaries (HABs) in the annealed specimens were examined to probe optimization potentials of grain boundary character distribution (GBCD) for this material. Results show that the deformed microstructure in the as-received material begins to be recrystallized when the annealing temperature increase to 500 °C and average grain sizes surge with further increasing temperatures. As a result of the recrystallization, a large number of annealing twins (with Σ3 misorientation) are produced, leading to remarkably increased fractions of SBs (f{sub SBs}). Thanks to preexisting dense low angle boundaries, the majority of SBs in the 500 °C specimen with only partial recrystallization are Σ3{sub ic} (incoherent) boundaries, which effectively disrupt connectivity of random HABs network. Although the f{sub SBs} can be further increased (up to 72.5%) in specimens with full recrystallization (at higher temperatures), the Σ3{sub ic} boundaries would be replaced to some extent by Σ3{sub c} (coherent) boundaries which do not contribute directly to optimizing the GBCD. This work should be able to provide clear suggestions on applying the concept of grain boundary engineering to tin bronze alloys. - Highlights: • The rolled tin bronze begins to be recrystallized as temperature increases to 500 °C. • A lot of SBs are produced after recrystallization and the highest f{sub SBs} is 72.5%. • Partially recrystallized specimen has the optimum GBCD due to more Σ3{sub ic} boundaries. • The Σ3{sub ic} boundaries are replaced by Σ3{sub c} boundaries after full recrystallization.

  7. El objeto en el marco de la vida

    Directory of Open Access Journals (Sweden)

    Manuel Carmona García

    2017-07-01

    Full Text Available En el marco doméstico contemporáneo, que los nuevos modos de vida reclaman más abierto y más libre, los objetos gracias a su nueva faceta semántica, participan en la organización y cualificación del espacio. En dicho proceso de configuración los elementos actúan, por un lado distribuyendo y ordenando, organizados en sistemas basados en relaciones topológicas y geométricas, y por otro añadiendo una nueva dimensión psicológica a los nuevos ámbitos, permaneciendo como elementos simbólicos o actuando como mecanismos que influyen en la vivencia y en la percepción espacial. En este artículo se realiza un acercamiento a la visión del objeto en el marco contemporáneo, siguiendo los estudios sociológicos de Baudrillard, Moles o Barthes, entre otros, y a través de las exposiciones y ferias de mobiliario y enseres para el hogar que proliferan, en una sociedad de consumo, a partir de los 60. Así mismo se establece un sistema de análisis que determina una correspondencia entre características y cualidades que son propias del espacio doméstico contemporáneo y los modos de actuación de los objetos en dichos entornos, constatando, de esta manera, que los objetos contribuyen a configurar ámbitos con unas determinadas propiedades gracias a sus modos de relación y conexión en el espacio.

  8. Lead poisoning from use of bronze drinking vessels during the late Chinese Shang dynasty: an in vitro experiment.

    Science.gov (United States)

    Woolf, Alan D; Law, Terence; Yu, Hoi-Ying Elsie; Woolf, Nicholas; Kellogg, Mark

    2010-08-01

    Bronze drinking vessels famous for their intricate carvings and used by the aristocracy in the Chinese Shang dynasty (1555-1145 BCE) are known to have been fabricated with alloys containing soft metallic lead. The contribution of lead leaching from such vessels into the fermented grain wines drunk by the Chinese nobility in ancient times has not been previously estimated. Three bronze vessels containing 8% lead by weight were fabricated to resemble the late Shang bronze goblets. Shaoxing drinking rice wine was purchased locally and placed in the vessels, using a white grape wine and water as comparisons. Sampling was performed at baseline, 2 min, and then at days 1, 2, 4, and 7. Lead concentrations in the liquid matrix were measured using atomic absorption spectroscopy. Significant amounts of lead leached into the liquid within one day: 13,900 μg/L in water, 45,900 μg/L in rice wine, and 116,000 μg/L in white wine. Lead continued to leach into both the grape and rice wines with the passage of time. Significant lead contamination of Shaoxing rice wine was detected when it was left in bronze goblets fabricated to resemble the Shang dynasty vessels. If a liter of contaminated wine was drunk daily, the daily intake of lead could have been as high as 85 mg. Such a high degree of contamination could cause chronic lead poisoning, affecting the health of the Shang nobility who used bronze beverage containers, before lead was excluded from the manufacture of bronze.

  9. Hematology of the bronze Turkey (Meleagris gallopavo): Variations with age and gender

    OpenAIRE

    Schmidt,Elizabeth Moreira dos Santos; Paulillo, Antonio Carlos [UNESP; Martins, Gislaine Regina Vieira [UNESP; Lapera, Ivan Moura [UNESP; Testi, Alan Jonathan Pereira [UNESP; Nardi Junior, Leonildo [UNESP; Denadai, Janine [UNESP; Fagliari, José Jurandir [UNESP

    2009-01-01

    One hundred and ten Bronze Turkeys: 40 females (19-23 week-old), 13 males (19-23 week-old), 35 females (30-32 week-old) and 22 males (30-32 week-old), were investigated to analyse the influences of age and sex on hematological parameters. Statistical comparisons were made for differences in values between male and female and among different ages. Lymphocytes were the major circulating leukocyte for all birds. Total serum protein, lymphocytes and basophils were significantly different between ...

  10. Regeneration of plants from leaves of Chrysanthemum morifolium Ram. cv. Bronze Bornholm in in vitro cultures

    Directory of Open Access Journals (Sweden)

    Aurelia Ślusarkiewicz-Jarzina

    2014-01-01

    Full Text Available Plants were obtained from cultured in vitro leaves of Chrysanthemum morifolium Ram. cv. Bronze Bornholm. The leaves were inoculated on Murashige and Skoog medium (MS supplemented with cytokinins (kinetin - KIN, zeatin - ZEA, 6-benzyloaminopurine - BAP and auxins (2,4-dichlorophenoxyacetic acid - 2,4-D, α-naphtaleneacetic acid - NAA, 3-indolilacetic acid - IAA, p-fluorophenylalanine - PFA in various combinations and concentra-tions. The most suitable medium was that one which contained 4 mg/l KIN, 2 mg/l NAA and 50 mg/l PFA.

  11. Computed Tomography and Computed Radiography of late Bronze Age Cremation Urns from Denmark

    DEFF Research Database (Denmark)

    Harvig, Lise Lock; Lynnerup, Niels; Amsgaard Ebsen, Jannie

    2012-01-01

    To improve methods used to study prehistoric cremation rituals, cremation urns from the Danish late Bronze Age were examined using Computed Tomography and Computed Radiography (Digital X-ray). During microexcavation, the digital images were used as registration tool. Our results suggest...... that osteological ageing and sexing are more accurate when combining CT-images with excavated remains. Digital volume rendering further enables a compromised estimation of original cremation weight. Microexcavation is clearly a primary cause of bone fragmentation. Cremated remains affected by lower cremation...

  12. Electrolytic surface hardening of steel,castiron and aluminium-bronze

    Directory of Open Access Journals (Sweden)

    Suhas Keshav Paknik a r

    2006-08-01

    Full Text Available Electrolytic hardening process w as developed in USSR in the 1950s. The process w as developed but w as not com m ercially exploited. There is no evidence of w ork done on this process in India. The author has done this originalw ork applied to different m aterials like steel, castiron and alum inum -bronze.This paper gives details ofm icrostructuraltransform ations along w ith hardness value achieved. There is vitalscope for this process to becom e viable for surfacehardening and selective hardening ofsm allcom ponents.

  13. The Influence of Pseudomonas fluorescens on Corrosion Products of Archaeological Tin-Bronze Analogues

    Science.gov (United States)

    Ghiara, G.; Grande, C.; Ferrando, S.; Piccardo, P.

    2018-01-01

    In this study, tin-bronze analogues of archaeological objects were investigated in the presence of an aerobic Pseudomonas fluorescens strain in a solution, containing chlorides, sulfates, carbonates and nitrates according to a previous archaeological characterization. Classical fixation protocols were employed in order to verify the attachment capacity of such bacteria. In addition, classical metallurgical analytical techniques were used to detect the effect of bacteria on the formation of uncommon corrosion products in such an environment. Results indicate quite a good attachment capacity of the bacteria to the metallic surface and the formation of the uncommon corrosion products sulfates and sulfides is probably connected to the bacterial metabolism.

  14. Marco Polo’s 'Devisement dou monde' and Franco-Italian tradition

    Directory of Open Access Journals (Sweden)

    Alvise Andreose

    2015-02-01

    Full Text Available The manuscript BNF fr. 1116 (F is the best surviving witness of the Devisement dou monde both for the quality of its reading and because it offers the closest version to the original form of the text. The book was written by Marco Polo, who had travelled for 24 years in Asia in the last quarter of the thirteenth century, and Rustichello da Pisa, an Arthurian romance writer, while both were prisoners in Genoa in 1298. The language in which the work was first written – an Old French heavily sprinkled with morphological as well as lexical Italianisms – is considered as a representative example of «Franco-Italian». The great heterogeneity of the texts usually included within this category, however, might provide an incorrect impression as regards both the original linguistic form of the Devisement and the audience to whom it was originally addressed. The language of the MS BNF fr. 1116 does not display strong similarities to the hybrid language used in Northern Italy for chivalric literature, which is traditionally called «Franco-Italian» or «Franco-Venetan». Some linguistic correspondences enable us to connect the MS BNF fr. 1116 with the group of Old French manuscripts copied by Pisan scribes while incarcerated in Genoa prison, following the battle of Meloria (1284. The fragment of the Devisement recently discovered by C. Concina appears to be very similar to F. Both graphic and phonetic evidences suggest that this witness, too, has to be localised to Tuscany.

  15. MARCO FÍSICO Y RIESGOS NATURALES DE LA CIUDAD DE ALICANTE

    Directory of Open Access Journals (Sweden)

    Antonio Gil Olcina

    1991-01-01

    Full Text Available La ciudad de Alicante posee un envidiable capital de situación y disfruta determinadas ventajas climáticas, que configuran un marco físico favorable y grato, si bien no exento de riesgos naturales; entre éstos descuellan la sismicidad y, sobre todo, los diluvios. Mientras la primera constituye una amenaza latente y escasamente sentida, no sucede igual con las inundaciones, puesto que el perí odo de retorno de los aluviones que producen daños, más o menos cuantiosos, en Alicante es breve; estadísticamente, la capital queda anegada cada diecinueve meses, es decir, por término medio, 0,6 veces al año. Una porción considerable del casco urbano ocupa lechos mayores y ordinarios de un conjunto de barrancos, que, con motivo de lluvias intensas, recobran su antigua función. En resumen, el secular problema de inundaciones que todavía aqueja a la ciudad de Alicante tiene hondas raíces naturales y ha sido agravado en el transcurso del tiempo por actuaciones humanas de claro signo negativo.

  16. An isotopic investigation into the origins and husbandry of Mid-Late Bronze Age cattle from Grimes Graves, Norfolk.

    OpenAIRE

    Towers, Jacqueline; Bond, Julie; Evans, Jane; Mainland, Ingrid; Montgomery, Janet

    2017-01-01

    Bioarchaeological evidence suggests that the site of Grimes Graves, Norfolk, characterised by the remains of several hundred Late Neolithic flint mineshafts, was a permanently settled community with a mixed farming economy during the Mid-Late Bronze Age (c. 1400 BCE – c. 800 BCE). The aim of this study was to investigate, through isotope ratio analysis (87Sr/86Sr, δ13C and δ18O), the origins and husbandry of Bronze Age cattle (Bos taurus) excavated from a mineshaft known as the “1972 shaft”. ...

  17. Micro-EDXRF surface analyses of a bronze spear head: Lead content in metal and corrosion layers

    Energy Technology Data Exchange (ETDEWEB)

    Figueiredo, E. [Instituto Tecnologico e Nuclear, Estrada Nacional 10, 2686-953 Sacavem (Portugal); Departamento de Conservacao e Restauro, Faculdade de Ciencias e Tecnologia da Universidade Nova de Lisboa, Quinta da Torre, 2829-516 Monte de Caparica (Portugal)], E-mail: elin@itn.pt; Valerio, P.; Araujo, M.F. [Instituto Tecnologico e Nuclear, Estrada Nacional 10, 2686-953 Sacavem (Portugal); Senna-Martinez, J.C. [Instituto de Arqueologia, Faculdade de Letras da Universidade de Lisboa, Cidade Universitaria, Campo Grande, 1600-214 Lisbon (Portugal)

    2007-09-21

    A bronze spear head from Central Portugal dated to Late Bronze Age has been analyzed by non-destructive micro-EDXRF in the metal surface and corrosion layers. The artifact had previously been analyzed using a conventional EDXRF spectrometer having a larger incident beam. The quantification of the micro-EDXRF analyses showed that lead content in corrosion layers can reach values up to four times higher than the content determined in the metal surface. Results obtained with the higher energy incident beam from the EDXRF equipment, although referring mainly to the corrosion layers, seem to suffer some influence from the surface composition of the metallic alloy.

  18. Monitoring and assessment of regional air quality in China using space observations (Marco Polo)

    NARCIS (Netherlands)

    Ronald, A. van der; Timmermans, R.; Bai, J.; Zhang, Q.; Wal, L. van der

    2013-01-01

    In this paper we will present the FP7-project 'MarcoPolo'. The main objective of MarcoPolo is to improve air quality monitoring, modelling and forecasting over China using satellite data. During the project a new emission inventory will be constructed by combining Chinese and European expertise. It

  19. Shellfish from the Bronze Age Site of Clos des Châtaigniers (Mathieu, Normandy, France

    Directory of Open Access Journals (Sweden)

    Caroline Mougne

    2014-09-01

    Full Text Available This article provides initial results on the use of shellfish by the inhabitants of Clos des Châtaigniers, Normandy (France during the Late Bronze Age. The settlement is located at Mathieu, 10km from the coast. The French National Institute of Preventive Archaeological Research (INRAP conducted excavations on this site in 2010, under the direction of David Giazzon. A semi-circular domestic enclosure from the end of the Late Bronze Age was discovered. The diet of the inhabitants of Mathieu was partly based on mussels, which were found in large quantities. These shells were collected at low tide on a rocky to muddy/rocky shore. They were then transported inland to be eaten fresh or processed. Other marine invertebrates were also present on this site. Some of them were collected with the mussels. In fact, they were mixed with or fixed to this bivalve. Many other small fragments of shells are present on the site and could have come from the stomach contents of fish.

  20. Synthesis and ferroelectric properties of rare earth compounds with tungsten bronze-type structure

    Energy Technology Data Exchange (ETDEWEB)

    Bouziane, M., E-mail: bouzianemeryem@yahoo.fr [Laboratoire de Chimie du Solide Appliquee, Faculte des Sciences, Avenue Ibn Batouta, BP 1014, Rabat (Morocco); Taibi, M. [Laboratoire de Physico-Chimie des Materiaux, LAF 502, Ecole Normale Superieure, BP 5118, Rabat (Morocco); Boukhari, A. [Laboratoire de Chimie du Solide Appliquee, Faculte des Sciences, Avenue Ibn Batouta, BP 1014, Rabat (Morocco)

    2011-10-03

    Highlights: {center_dot} Polycrystalline materials with the tungsten bronze-type structure have been synthesized and characterized. {center_dot} Effect of the incorporation of rare earth ions and paramagnetic cations (Fe{sup 3+}) into a matrix ferroelectrically active was studied. {center_dot} Ferroelectric transition is pronounced by a large thermal hysteresis during the heating and cooling cycles. {center_dot} Phase transitions around T{sub c} were confirmed by differential scanning calorimetry (DSC) measurements. - Abstract: Polycrystalline materials with a general formula Pb{sub 2}Na{sub 0.8}R{sub 0.2}Nb{sub 4.8}Fe{sub 0.2}O{sub 15} (R = Dy, Eu, Sm, Nd, La) have been synthesized, in air by a high temperature solid state reaction method. X-ray diffraction study, at room temperature, revealed that they crystallize in the tungsten bronze-type structure. Dielectric properties were performed, in the temperature range 25-500 deg. C, at three different frequencies 10, 100 and 1000 kHz. The ferroelectric transition is pronounced by a large thermal hysteresis during the heating and cooling cycles. The determined Curie temperature values T{sub c} were discussed as a function of rare earth size. Phase transitions around T{sub c} for the investigated compounds were confirmed by differential scanning calorimetry (DSC) measurements.

  1. The Pranemuru project and the radiocarbon chronology of the Sardinian Bronze Age

    Directory of Open Access Journals (Sweden)

    Rubinos, Antonio

    2003-12-01

    Full Text Available New C-14 data collected by a Spanish team working in the Sardinian Pranemuru area, allow usthe possibility of revising the C-14 Chronology for the Nuragic Bronze Age and discussing the reliability of some of the dates, as well as the way they have been published, and their matching with the new official chronology for the Sardinian Bronze and Iron Ages, built on Dendro and C14 sequences for the Italian Peninsula.

    La obtención por parte del Proyecto Pranemuru de cerca de una veintena de dataciones radiocarbónicas para una microregión en época nurágica, de las que aquí se recogen discuten catorce, abre la posibilidad de revisar la cronología de la Edad del Bronce en Cerdeña, a la luz de las dataciones recogidas desde los años 90 por Trump (1990 y Tykot (1994 y, más recientemente, por Webster (2001, discutir la validez de las fechas en función de los criterios de recogida de muestra, contexto arqueológico, desviación estándar y forma en que ha sido publicada, así como contrastarla con la cronología propuesta recientemente para la Protohistoria sarda, de acuerdo con la Dendrocronología y Cronología Radiocarbónica para la Italia peninsular (Lo Schiavo 2002.

  2. $Nb_{3}Sn macrostructure, microstructure, and property comparisons for bronze and internal Sn process strands

    CERN Document Server

    Lee, P J; Larbalestier, D C

    2000-01-01

    The variation in irreversibility field, B*(T), with temperature has been measured for Nb/sub 3/Sn superconducting strands manufactured for ITER using vibrating sample and SQUID magnetometers. The high performance strands were developed for both high transport critical current density, J/sub c/, and low hysteresis loss. Despite a wide variety of designs and components, the strands could be split into two distinctive groups, based on the extrapolated irreversibility fields, which lie about 10% lower than the upper critical field. "Bronze-process" strands exhibited consistently higher B*(T) (28 T to 31 T) compared with "internal Sn" process (24 T to 26 T) conductors. The intrinsic critical current density of the superconductor, J/sub c (sc)/, and the specific pinning force of the grain boundaries, Q/sub gb/, were evaluated using the measured J/sub c/, and image analysis of the macro- and micro-structures. A bronze-processed Nb(-Ta)/sub 3 /Sn was found to have a higher J/sub c(sc)/ but lower Q/sub gb/ than Nb/sub...

  3. Las Lunas (Yuncler, Toledo. A Bronze Age hoard with metallic materials from the southern Iberian Meseta

    Directory of Open Access Journals (Sweden)

    Urbina Martínez, Dionisio

    2010-06-01

    Full Text Available Here we present the results of the preliminary study carried out on a new group of metallic materials of the Final Bronze Age, recovered at the end of 2008 in the archaeological excavations at the settlement of Las Lunas (Yuncler, Toledo, Spain. Its geographical situation far away from the main zones of distribution of this type of finds, the singularity of the materials, and the evidence of Atlantic and Mediterranean relations make these materials a remarkable sample for the study of the Final Bronze Age in the centre of the Iberian Peninsula.

    Se exponen los resultados del primer estudio realizado sobre un nuevo conjunto de materiales metálicos del Bronce Final recuperado a finales de 2008 en las excavaciones arqueológicas del yacimiento de Las Lunas (Yuncler, Toledo, España. La localización geográfica del hallazgo, lejos de las principales zonas de dispersión conocidas para este tipo de conjuntos, la singularidad de los objetos que integra, y las relaciones atlánticas y mediterráneas que evidencian sus materiales, lo convierten en un ejemplo destacado para el estudio de este período en el centro de la Península Ibérica.

  4. Vegetation development in the Middle Euphrates and Upper Jazirah (Syria/Turkey) during the Bronze Age

    Science.gov (United States)

    Deckers, Katleen; Pessin, Hugues

    2010-09-01

    Vegetation changes are reconstructed based on more than 51,000 charcoal fragments of more than 380 samples from nine Bronze Age sites in northern Syria and southern Turkey. In addition to fragment proportions, special attention was paid to the frequency of Pistacia relative to Quercus and Populus/ Salix relative to Tamarix, fruit-tree ubiquity, and riverine diversity in order to gain an improved understanding of the human versus climatic impact on the vegetation. The results indicate that human impacts first took place within the riverine forest. This phase was followed by land clearing within the woodland steppe, especially in the northern portion of the study area. In the south near Emar, the woodland steppe probably disappeared by the Late Bronze Age. It is uncertain whether this was caused by aridification and/or human clearing. The northward shift of the Pistacia-woodland steppe is very likely a result of climatic drying that occurred throughout the entire period under investigation. Although increased deforestation is evident through time, the small proportions of imported wood indicate that local resources were still available.

  5. Animal exploitation in northeast Tibetan Plateau during Neolithic-Bronze Age

    Science.gov (United States)

    Dong, Guanghui; Ren, Lele; Li, Zhipeng; Zhang, Dongju; Chen, Fahu

    2017-04-01

    The history and driving force for prehistoric human occupation of the Tibetan Plateau has been intensively concerned in recent years. Multidisciplinary studies reveal that human extensively and year-roundly settled below 2500 m asl in northeast Tibetan Plateau (NETP) since 5200BP mainly with the utilization of millet crops, and above 3000 m asl post 3600BP primarily with cold-tolerant barley. However, the strategy for human animal utilization during Neolithic and Bronze periods in NETP still remains enigmatic. We collected and identified hundreds of animal bones from 14 Neolithic and Bronze sites in NETP, with the application of radiocarbon dating, carbon and nitrogen isotopes analysis, and ancient DNA analysis, we explore the changing patterns of animal utilization, and potential human behaviours for taming wild animals in this area throughout late prehistoric times. These works shed lights for understanding when and how husbandry and pastoral economies emerged, and how prehistoric human adapted to the high-cold environment of the Tibetan Plateau..

  6. Abertura floral de Dendranthema grandiflora Tzvelev. ´Bronze Repin´após rmazenamento a frio seguido de “pulsing” Floral opening of Dendranthema grandiflora Tzvelev. ´Bronze Repin´after cold storage followed by pulsing

    Directory of Open Access Journals (Sweden)

    Rogério Antônio Bellé

    2004-02-01

    Full Text Available Visando estudar a abertura de inflorescências e a vida de vaso de crisântemo (Dendranthema grandiflora Tzvelev. ‘Bronze Repin’ colhido precocemente, montou-se um experimento em delineamento inteiramente casualizado bifatorial 2 x 6 com cinco repetições, realizado no Departamento de Fitotecnia da Universidade Federal de Santa Maria. As hastes foram armazenadas a 2ºC ou 5ºC por sete dias, sendo em seguida tratadas com soluções de “pulsing” por 24h e mantidas em vasos com água de torneira, renovada a cada dois dias. As soluções utilizadas foram: Água (testemunha; Tiosulfato de Prata-STS 11mg.L-1 (Crysal AVB; Ácido Giberélico-GA3 50mg.L-1 (Pro-gibb; Hipoclorito de Sódio-NaOCl 200mg.L-1; 8-Hidroxiquinolina-8-HQ 100mg.L-1; Tiabendazole-TIBA 100mg.L-1(Tecto 100. Com exceção da testemunha, as outras soluções continham 2% de Sacarose. Com estes tratamentos, observou-se que não foi possível uma abertura perfeita da inflorescência, mas a vantagem foi de prolongar a sua vida, podendo-se colocá-las no mercado num momento mais oportuno.The study of opening of inflorescences and the vase life (Dendranthema grandiflora Tzvelev. ‘Bronze Repin’ early picked of chysanthemum, was carried out in an experiment entirely set up in bifactorial 2 x 6 with five repetitions, at the Department of Fitotecnia of Santa Maria’s Federal University. The stems were stored at 2ºC or 5ºC for 7 days, prior to being treated with pulsing solutions for 24 hours and maintained in vases with distilled water, renewed every two days. The solutions used as follows: Water (control; Silver Thiosulfate-STS 11mg.L-1 (Crysal AVB; Giberelic Acid-GA3 50mg.L-1 (Pro-gibb; Sodium Hipochloride-NaOCl 200mg.L-1; 8-Hidroxyquinoline-8-HQ 100mg.L-1; Tiabendazole-TIBA 100mg.L-1 (Tecto 100. With the exception of the control, all solutions contained 2% sucrose. Perfect opening of the flower was not achieved, but vase life could be extended in order to place them in the

  7. MarcoPolo-R: Mission and Spacecraft Design

    Science.gov (United States)

    Peacocke, L.; Kemble, S.; Chapuy, M.; Scheer, H.

    2013-09-01

    The MarcoPolo-R mission is a candidate for the European Space Agency's medium-class Cosmic Vision programme, with the aim to obtain a 100 g sample of asteroid surface material and return it safely to the Earth. Astrium is one of two industrial contractors currently studying the mission to Phase A level, and the team has been working on the mission and spacecraft design since January 2012. Asteroids are some of the most primitive bodies in our solar system and are key to understanding the formation of the Earth, Sun and other planetary bodies. A returned sample would allow extensive analyses in the large laboratory-sized instruments here on Earth that are not possible with in-situ instruments. This analysis would also increase our understanding of the composition and structure of asteroids, and aid in plans for asteroid deflection techniques. In addition, the mission would be a valuable precursor for missions such as Mars Sample Return, demonstrating a high speed Earth re-entry and hard landing of an entry capsule. Following extensive mission analysis of both the baseline asteroid target 1996 FG3 and alternatives, a particularly favourable trajectory was found to the asteroid 2008 EV5 resulting in a mission duration of 4.5 to 6 years. In October 2012, the MarcoPolo-R baseline target was changed to 2008 EV5 due to its extremely primitive nature, which may pre-date the Sun. This change has a number of advantages: reduced DeltaV requirements, an orbit with a more benign thermal environment, reduced communications distances, and a reduced complexity propulsion system - all of which simplify the spacecraft design significantly. The single spacecraft would launch between 2022 and 2024 on a Soyuz-Fregat launch vehicle from Kourou. Solar electric propulsion is necessary for the outward and return transfers due to the DeltaV requirements, to minimise propellant mass. Once rendezvous with the asteroid is achieved, an observation campaign will begin to characterise the

  8. SETA-Hyperspectral Imaging Spectrometer for Marco Polo mission.

    Science.gov (United States)

    de Sanctis, M. Cristina; Filacchione, Gianrico; Capaccioni, Fabrizio; Piccioni, Giuseppe; Ammannito, Eleonora; Capria, M. Teresa; Coradini, Angioletta; Migliorini, Alessandra; Battistelli, Enrico; Preti, Giampaolo

    2010-05-01

    The Marco Polo NEO sample return M-class mission has been selected for assessment study within the ESA Cosmic Vision 2015-2025 program. The Marco Polo mission proposes to do a sample return mission to Near Earth Asteroid. With this mission we have the opportunity to return for study in Earth-based laboratories a direct sample of the earliest record of how our solar system formed. The landing site and sample selection will be the most important scientific decision to make during the course of the entire mission. The imaging spectrometer is a key instrument being capable to characterize the mineralogical composition of the entire asteroid and to analyze the of the landing site and the returned sample in its own native environment. SETA is a Hyperspectral Imaging Spectrometer able to perform imaging spectroscopy in the spectral range 400-3300 nm for a complete mapping of the target in order to characterize the mineral properties of the surface. The spectral sampling is of at least 20 nm and the spatial resolution of the order of meter. SETA shall be able to return a detailed determination of the mineralogical composition for the different geologic units as well as the overall surface mineralogy with a spatial resolution of the order of few meters. These compositional characterizations involve the analysis of spectral parameters that are diagnostic of the presence and composition of various mineral species and materials that may be present on the target body. Most of the interesting minerals have electronic and vibrational absorption features in their VIS-NIR reflectance spectra. The SETA design is based on a pushbroom imaging spectrometer operating in the 400-3300 nm range, using a 2D array HgCdTe detector. This kind of instrument allows a simultaneous measurement of a full spectrum taken across the field of view defined by the slit's axis (samples). The second direction (lines) of the hyperspectral image shall be obtained by using the relative motion of the orbiter

  9. Marco Polo : an Italian Mission Scoring a lot of Records

    Science.gov (United States)

    di Pippo, Simonetta; Bracciaferri, Fabio M.

    2002-01-01

    The first astronaut of the European Astronaut Corps of Italian nationality, Roberto Vittori, will fly on a Soyuz capsule at the end of April 2002, opening a new era of space flight. The mission, sponsored by the Italian Space Agency, has been developed in the framework of an ESA- ROSAVIAKOSMOS agreement, reached in order to give European astronauts additional possibilities to fly. It's the first mission of this kind. In addition to that, this is the real first time in which a Soyuz mission is in the hands of two cosmonauts, and one of them is non Russian. On the same flight, in fact, Mark Shuttleworth, the second tourist in the history of space activities, is going to fly, performing also a set of scientific experiments. Marco Polo is also the first mission in which the two Agencies, ASI and ESA, are developing a joint commercialisation program, devoted to attire sponsors for improving research and development activities in the Human Spaceflight area. This will allow the two agencies to improve also the quality of life on Earth. A comprehensive scientific program is also foreseen accompanying Vittori on board, mainly in the field of life science. Experiments devoted to neurophysiology, arms rehabilitation, test of new materials for dressing in space, evaluation of the behaviour of the Nobel Prize Montalcini discovery named NGF (Nerve Growth Factor) will be performed on board. A R&D payload for Blood Pressure Measurements could have in the future commercial spin-off. In addition, a possible institutional sponsorship of the World Health Organization is under discussion. It will be the real first time in which a space mission gets this kind of sponsorship, and this strictly related to the World Health Day this year, devoted in promoting health throughout movement, i.e. "Move for Health". The Italian Space Agency proposed a joint combination of the two slogans, coupling the "Move for Health" message with the Italian "Space for Health" one. This is because of the Marco

  10. A História da enfermagem em Pernambuco: um olhar da ABEn (1968-1972

    Directory of Open Access Journals (Sweden)

    Fatima Maria da Silva Abrão

    2001-06-01

    Full Text Available Este artigo é uma tentativa de contribuir com a história da enfermagem ao levantar questões relevantes, marcos e influências que através da Associação Brasileira de Enfermagem foram vislumbrados na época. Através de depoimento oral e análise de documentos pudemos destacar ampla atuação da associação relacionadas à questões trabalhistas, normatização do exercício profissional, formação profissional, atividades sócio-culturais e educativas da enfermagem em Pernambuco.

  11. Metal Adornments of Clothing and Headwear in the Bronze Age of Western Siberia (issues of research and reconstruction ..

    Directory of Open Access Journals (Sweden)

    Umerenkova Olga V.

    2017-09-01

    Full Text Available The article considers issues related to the principals of scientific approach, methods and procedure of costume reconstruction on the basis of archaeological materials dating back to the Bronze Age discovered in the territory of Western Siberia. The costume is considered by researchers as one of the brightest manifestations of material culture. Its decoration provides multidisciplinary information containing elements of ideology and aesthetic norms together with traditions and social relationships. Reconstruction of clothing and headwear adornments in archaeological literature related to the Bronze Age is one of the understudied topics. Researchers use various sources for its recreation: archaeological materials, written historical, literature and folklore sources, and fine art items. A significant amount of source items has accumulated over the last decades, although the analysis and principles of processing thereof have not been sufficiently covered in special literature. In order to increase the informative capabilities of adornments as sources for the reconstruction of the Bronze Age costume, the author suggested a scheme of accounting for the location of adornments with respect to the remains of the buried when the excavations are documented. The article features the results of the author's reconstruction of women's headwear decoration with metal articles executed on the basis of Bronze Age materials.

  12. Analyzing Lead Content in Ancient Bronze Coins by Flame Atomic Absorption Spectroscopy: An Archaeometry Laboratory with Nonscience Majors

    Science.gov (United States)

    Donais, Mary Kate; Whissel, Greg; Dumas, Ashley; Golden, Kathleen

    2009-01-01

    A unique, interdisciplinary collaboration between chemistry and classics has led to the development of an experiment for nonscience majors. This instrumental analysis experiment was designed for use in an archaeology course to quantify the amount of lead in ancient bronze coins. The coins were corroded beyond visual identification, so provenance…

  13. Near-Earth Object Exploration and Marco Polo-R

    Science.gov (United States)

    Abell, Paul

    2013-01-01

    A major goal for NASA's human spaceflight program is to send astronauts to near-Earth asteroids (NEAs) in the coming decades. Missions to NEAs would undoubtedly provide a great deal of technical and engineering data on spacecraft operations for future human space exploration while conducting in-depth scientific examinations of these primitive objects. However, prior to sending human explorers to NEAs, robotic investigations of these bodies would be required in order to maximize operational efficiency and reduce mission risk. These precursor missions to NEAs would fill crucial strategic knowledge gaps concerning their physical characteristics that are relevant for human exploration of these relatively unknown destinations. Therefore robotic investigations of NEAs, such as ESA's Marco Polo-R sample return mission to 2008 EV5, would allow NASA and its international partners to gain critical operational experience in performing complex tasks (e.g., close proximity operations, surface sample collection, etc.) under microgravity conditions at or near the surface of a potential human destination. This would provide an important synergy between the worldwide Science and Exploration communities, which will be crucial for development of future international deep space exploration architectures and has potential benefits for future exploration of other destinations beyond low-Earth orbit.

  14. El teatro im/posible en TV de Marco Paolini

    Directory of Open Access Journals (Sweden)

    Massimo Puliani

    2016-01-01

    Full Text Available En el contexto cultural italiano, la comercializacion de obras de teatro ha dejado de ser un producto orientado a un consumidor concreto para transformarse en muchos casos en un producto de largo consumo. De hecho, en las últimas décadas cadenas de televisión, editoriales, revistas especializadas y medios de comunicación escritos han estado editando y comercializando obras de teatro de manera satisfactoria y con una notable acogida de público y crítica. En este sentido, la obra editada y comercializada de Marco Paolini ha tenido (y tiene un papel fundamental. La edición televisada de espectáculos como Il racconto del Vajont, Miserabili, Il Milione o Ausmerzen. Vite indegne di essere vissute, son ejemplo de como un espectáculo teatral puede perfectamente tener cabida en un contexto televisivo, además de poder entenderse como un inestimable punto de partida para una reflexión sobre las posibilidades que ofrece la adaptación a un medio televisado.

  15. Hacia un marco conceptual para repensar la accesibilidad cultural

    Directory of Open Access Journals (Sweden)

    Fernando Landini

    2014-02-01

    Full Text Available La accesibilidad de la población al sistema de salud constituye una de las principales preocupaciones de las políticas sanitarias. No obstante, son pocos los trabajos que profundizan conceptualmente en dicha noción. La mayor parte de ellos diferencia entre disponibilidad, accesibilidad y aceptabilidad, o entre accesibilidad geográfica, financiera, administrativa y cultural. En el presente trabajo se discute y analiza la noción de accesibilidad, definiéndosela como un proceso de articulación conflictiva entre demanda y oferta en salud. A la vez, se focaliza en la noción de accesibilidad cultural, la cual es repensada como una interfaz social, es decir, como un espacio conflictivo en el que se articulan marcos de sentido diferentes, en este caso el de los profesionales y el de los pacientes. Esto permite abordar los procesos complejos de apropiación, traducción y reconfiguración de los conocimientos y recomendaciones que se dan en este vínculo.

  16. Identidad, escritura, performance: Marco Paolini, actor y autor

    Directory of Open Access Journals (Sweden)

    Simone Soriani

    2016-01-01

    Full Text Available Marco Paolini es uno de los más representativos actores y autores del llamado "teatro di narrazione". El presente artículo pretende acercarse a algunos aspectos centrales de su poética en tanto actor y escritor, tales como los complejos y articulados procesos a través de los cuales llega a un (más o menos definitivo texto escrito; la fuerte relación que establece entre él y su público, a quien Paolini siempre se dirige consciente y explícitamente con gags y "bromas" en ocasiones tomados de la tradición del teatro popular italiano; o el "lenguaje del cuerpo" que Paolini pone en práctica en el escenario y en las páginas de sus libros publicados, en el que (de un modo personal mezcla el italiano, dialectos venecianos y ecos de poetas y escritores de la tradición literaria italiana.

  17. CIF: Marco Instruccional Colaborativo Guiado por Objetivos Educativos y su Aplicación al Aprendizaje de la Programación

    OpenAIRE

    Serrano Cámara, Luis Miguel

    2016-01-01

    Tesis Doctoral leída en la Universidad Rey Juan Carlos de Madrid en 2015. Director de la Tesis: Maximiliano Paredes Velasco. Codirector: Jesús Ángel Velázquez Iturbide A lo largo de esta tesis se presenta, desarrolla y utiliza un marco instruccional colaborativo denominado CIF (Collaborative Instructional Framework), que basado en la taxonomía de Bloom, facilita a los docentes la instrucción de clases colaborativas con o sin soporte computacional. Existen múltiples aproximaciones metodo...

  18. Marco Estructural de Gestión Ambiental MEGA: Resumen del informe final

    OpenAIRE

    Perú. Consejo Nacional del Ambiente

    1997-01-01

    Contiene: 1. Contexto teórico-práctico para la gestión ambiental. 2. Marco Estructural de Gestión Ambiental (MEGA). 3. Funcionamiento de los niveles del Marco Estructural de Gestión Ambiental (MEGA): ámbitos nacional y regional-municipal. La biblioteca posee la versión impresa, con código: 351.8232-M26 Presenta los aspectos conceptuales y de funcionamiento concreto del Marco Estructural de Gestión Ambiental en los ámbitos nacional, regional y municipal. 36 p. Biblioteca Ambiental...

  19. Lead-free, bronze-based surface layers for wear resistance in axial piston hydraulic pumps

    Energy Technology Data Exchange (ETDEWEB)

    Vetterick, Gregory Alan [Iowa State Univ., Ames, IA (United States)

    2010-01-01

    Concerns regarding the safety of lead have provided sufficient motivation to develop substitute materials for the surface layer on a thrust bearing type component known as a valve plate in axial piston hydraulic pumps that consists of 10% tin, 10% lead, and remainder cooper (in wt. %). A recently developed replacement material, a Cu-10Sn-3Bi (wt.%) P/M bronze, was found to be unsuitable as valve plate surface layer, requiring the development of a new alloy. A comparison of the Cu-1-Sn-10Pb and Cu-10Sn-3Bi powder metal valve plates showed that the differences in wear behavior between the two alloys arose due to the soft phase bismuth in the alloy that is known to cause both solid and liquid metal embrittlement of copper alloys.

  20. Rapid climate change did not cause population collapse at the end of the European Bronze Age.

    Science.gov (United States)

    Armit, Ian; Swindles, Graeme T; Becker, Katharina; Plunkett, Gill; Blaauw, Maarten

    2014-12-02

    The impact of rapid climate change on contemporary human populations is of global concern. To contextualize our understanding of human responses to rapid climate change it is necessary to examine the archeological record during past climate transitions. One episode of abrupt climate change has been correlated with societal collapse at the end of the northwestern European Bronze Age. We apply new methods to interrogate archeological and paleoclimate data for this transition in Ireland at a higher level of precision than has previously been possible. We analyze archeological (14)C dates to demonstrate dramatic population collapse and present high-precision proxy climate data, analyzed through Bayesian methods, to provide evidence for a rapid climatic transition at ca. 750 calibrated years B.C. Our results demonstrate that this climatic downturn did not initiate population collapse and highlight the nondeterministic nature of human responses to past climate change.

  1. A mineralogical study of Late Bronze Age ceramics from Palatca (Transylvania, Romania

    Directory of Open Access Journals (Sweden)

    Lucretia Ghergari

    2012-01-01

    Full Text Available Our paper studies the mineralogical and petrographical characteristics of 28 ceramic fragments that were excavated in the village of Palatca, Transylvania (Romania. Optical microscopy, X-Ray powder diffraction (XRD, scanning electron microscopy (SEM, grain size analyses, and porosity measurements were used to investigate the samples. Our objective was to describe or reconstruct the corresponding products and to elucidate the manufacturing process, the firing techniques, and the transformation pathways. Based on our results, we conclude that the Late Bronze Age ceramics (1600-1300 BC were produced from clay and temper material such as river sand and ceramoclasts. It has been modeled by hand and fired between 800 and 950°C. For most samples, we can narrow the temperature range to 850-900°C. We interpret the data further from a geoarchaeological point of view with respect to the historical evolution of the local culture.

  2. Aarne Michaël Tallgren and the International Discussion on the Bronze Age of Russia

    Directory of Open Access Journals (Sweden)

    Timo Salminen

    2017-04-01

    Full Text Available This paper is on international scholarly discussion on the Bronze Age of Russia from 1908 until 1939, and in particular on the related role of the internationally renowned Finnish archaeologist Aarne Michaël Tallgren (1885–1945. How did a social network of researchers produce new interpretations and what were the key factors that distinguished the participants in the discussion? Was it a continuous process or a series of sudden changes? How did different ideological backgrounds influence the interpretations? In Western Europe, Tallgren’s most important interlocutors were Gero von Merhart, V Gordon Childe and Ellis H Minns, and in Russia V A Gorodcov and A A Spicyn. The paper is mainly based on correspondence between Tallgren and his colleagues.

  3. A 3-phase model for mixed columnar-equiaxed solidification in DC casting of bronze

    Science.gov (United States)

    Hao, J.; Grasser, M.; Wu, M.; Ludwig, A.; Riedle, J.; Eberle, R.

    2012-01-01

    A three-phase Eulerian approach is used to model the columnar-to-equiaxed transition (CET) during solidification in DC casting of technical bronze. The three phases are the melt, the solidifying columnar dendrites and the equiaxed grains. They are considered as spatially interpenetrating and interacting continua by solving the conservation equations of mass, momentum, species and enthalpy for all three phases. The so defined solidification model is applied to a binary CuSn6 DC casting process as a benchmark to demonstrate the model potentials. Two cases are studied: one considering only feeding flow and one including both feeding flow and equiaxed sedimentation. The simulated results of mixed columnar and equiaxed solidification are presented and discussed including the occurrence of CET, phase distribution, feeding flow, equiaxed sedimentation and their influence on macrosegregation.

  4. Performance evaluation of grid-enabled registration algorithms using bronze-standards

    CERN Document Server

    Glatard, T; Montagnat, J

    2006-01-01

    Evaluating registration algorithms is difficult due to the lack of gold standard in most clinical procedures. The bronze standard is a real-data based statistical method providing an alternative registration reference through a computationally intensive image database registration procedure. We propose in this paper an efficient implementation of this method through a grid-interfaced workflow enactor enabling the concurrent processing of hundreds of image registrations in a couple of hours only. The performances of two different grid infrastructures were compared. We computed the accuracy of 4 different rigid registration algorithms on longitudinal MRI images of brain tumors. Results showed an average subvoxel accuracy of 0.4 mm and 0.15 degrees in rotation.

  5. Combining X-ray based methods to study the protohistoric bronze technology in Western Iberia

    Energy Technology Data Exchange (ETDEWEB)

    Valério, P., E-mail: pvalerio@ctn.ist.utl.pt [Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS (Portugal); Silva, R.J.C., E-mail: rjcs@fct.unl.pt [CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, FCT, Universidade Nova de Lisboa, 2829-516 Monte de Caparica (Portugal); Soares, A.M.M., E-mail: amsoares@ctn.ist.utl.pt [Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS (Portugal); Araújo, M.F., E-mail: faraujo@ctn.ist.utl.pt [Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS (Portugal); Gonçalves, A.P., E-mail: apg@ctn.ist.utl.pt [Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS (Portugal); Soares, R.M., E-mail: ruigusmao@hotmail.com [UNIARQ, Centro de Arqueologia da Universidade de Lisboa, Faculdade de Letras, Alameda da Universidade, 1600-214 Lisboa (Portugal)

    2015-09-01

    The Phoenician arrival at Iberian coastal regions had an actual influence on indigenous technology. A collection of coeval metallurgical remains and artefacts was studied by EDXRF, micro-EDXRF, SEM–EDS and XRD, to identify certain features of the production and utilisation of metal in protohistoric Western Iberia. The composition of artefacts indicates a prevalence of Cu–Sn alloys with low content of impurities (Pb, As, Sb and Fe) during Late Bronze and Early Iron Ages, while the composition of slags points to a smaller loss of copper in Phoenician smelting operations. Moreover, the amount of iron impurities in metal proved to be a helpful discriminator between indigenous and Phoenician-based metallurgies, showing that later alloys have higher amounts of iron. Besides, the indigenous alloys have higher tin contents that can probably be explained by the easier access to metal sources of local communities.

  6. Learners’ Mistakes or Professional Error – the Nordic Bronze Age ornaments

    DEFF Research Database (Denmark)

    Nørgaard, Heide Wrobel

    in practicing their trade. Within this study, visible production mistakes as well as errors in the decoration of the artefact were in focus. Such mistakes contain a large amount of information, as they can provide indications of the skill level of the craftsperson as well as on the social circumstances in which...... the item was crafted. In this paper, several examples will be compared to in order to illustrate the differences between professional mistakes and the hallmarks of apprenticeship. The aim is to differentiate between different kinds of apprenticeship solely based on visible mistakes. If such an approach......? Is this the result of different workshops, levels of crafting skills or perhaps even the incorporation of novice metalworkers? As part of a study on craft organization in the Nordic Bronze Age, several metal workshops were analyzed in relation to the skill of the craftsmen and the amount of time involved...

  7. STUDENTI MARCO POLO-TURANDOT E STRATEGIE DI ASCOLTO: UNO STUDIO SUL QUESTIONARIO MALQ

    National Research Council Canada - National Science Library

    Ambra Ferranti

    2017-01-01

    ... stato svolto presso il CALCIF – Università degli Studi di Milano e gli studenti partecipanti allo studio, 15 studenti sinofoni del progetto Marco Polo e Turandot, sono stati divisi in Gruppo Sperimentale...

  8. De la minus-valia a la diversidad funcional: un nuevo marco teorico-metodologico

    National Research Council Canada - National Science Library

    Ferreira, Miguel A.V

    2010-01-01

    En el presente texto, a partir de las propuestas del modelo social de la discapacidad, se propone un marco teorico que pretende abrir una via de investigacion que vaya mas alla de sus propuestas iniciales...

  9. Kinkaleri : teater peab tekitama küsimuse, mitte andma vastuse / Marco Mazzoni ; interv. Andres Keil

    Index Scriptorium Estoniae

    Mazzoni, Marco

    2008-01-01

    1995. a. Itaalias asutatud kuuest kunstnikust - Matteo Bambi, Luca Camilletti, Massimo Conti, Marco Mazzoni, Gina Monaco ja Cristina Rizzo - koosnevast eksperimentaalteatrist Kinkaleri ja Kanuti Gildi saalis 7. ja 8. nov. esiettekandele tulevast lavastusest "Yes, Sir!"

  10. MOVIMIENTOS SOCIALES, MARCOS DE ACCIÓN COLECTIVA Y PRECARIEDAD LABORAL

    Directory of Open Access Journals (Sweden)

    Raquel Mercedes Pinto Mascareño

    2014-10-01

    Full Text Available En la perspectiva socio-construccionista se destaca la importancia de definir teórica y conceptuamente los marcos de acción colectiva compartidos para el estudio de los movimientos sociales. No obstante, son escasas las investigaciones que analizan el sentido y la naturaleza compartida de estos marcos entre activistas políticos. En este estudio analizamos estas dimensiones en los marcos de acción colectiva que apoyan las luchas cotidianas de los activistas de la organización sindical minoritaria, CGT (Confederación General del Trabajo. Identificamos 3 marcos de acción colectiva compartidos que sientan las bases de sus luchas cotidianas, 2 de ellos con un mayor potencial para apoyar una movilización más amplia contra la crisis económica y la precariedad laboral.

  11. Association of decreased expression of the macrophage scavenger receptor MARCO with tumor progression and poor prognosis in human hepatocellular carcinoma.

    Science.gov (United States)

    Sun, Haoyu; Song, Jiaxi; Weng, Chenchun; Xu, Jing; Huang, Mei; Huang, Qiang; Sun, Rui; Xiao, Weihua; Sun, Cheng

    2017-05-01

    The macrophage receptor with collagenous structure (MARCO) belongs to the scavenger receptor family; however, few studies have assessed their potentials in modulating inflammatory signaling other than the typical function of pattern recognition and phagocytic clearance. Interestingly, RNA-Seq analyses of hepatocellular carcinoma (HCC) have identified MARCO as one of the top 30 differentially expressed genes between cancerous and adjacent noncancerous tissues. However, no research has been performed to study MARCO in liver cancer. MARCO protein expression was evaluated by immunostaining liver tissue specimens collected from 88 HCC patients, 10 liver cirrhosis patients, 6 metastatic patients, and 5 healthy controls. All sections were reviewed by blinded observers followed by the interpretation of integral optical density per area as a measure of protein intensity. We observed significantly decreased expression of MARCO in intratumoral tissues of HCC compared with expression in peritumoral tissues. The expression of MARCO declined progressively as the disease condition was aggravated, with the highest expression found in healthy controls and the lowest found in patients with HCC metastasis. Furthermore, MARCO expression decreased along with tumor progression. MARCO + cells co-localized with CD68 + cells, indicating predominant expression on macrophages. The overall survival rate was significantly increased in patients with high intratumoral MARCO expression compared with that of patients with low intratumoral MARCO expression. Our study is the first to demonstrate an association between MARCO expression and the progression and prognosis of HCC. © 2016 Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.

  12. Late Bronze Age in Alcáçova de Santarém (Portugal

    Directory of Open Access Journals (Sweden)

    Arruda, Ana Margarida

    2015-06-01

    Full Text Available The field work that took place in the restaurant area in Jardim das Portas do Sol (Alcáçova de Santarém recovered well-preserved archaeological layers dated to the Late Bronze Age, lying directly underneath the Iron Age phase. The excavation made it possible to collect an important set of ceramics that incorporate printed and incised decoration, which can be easily decoration related to the Cogotas 1 cultural background. Burnished decorations, with grooves on the inner surface and outer strips, are less common. The formal repertoire does not deviate from what is known about the Late Bronze Age in central and southern Iberian Peninsula. The data allow us to propose a chronology centered in the early 1st millennium BCE for this occupation.Durante los trabajos de campo, realizados en el área del restaurante del Jardim das Portas do Sol, se documentaron, por primera vez en Alcáçova de Santarém, niveles conservados del final de la Edad del Bronce, inmediatamente infrapuestos a los de la Edad del Hierro. Su excavación permitió recoger un conjunto de materiales cerámicos que incorpora varios fragmentos decorados por impresión e incisión, que pueden ser fácilmente relacionados con el universo cultural de Cogotas 1. Las decoraciones bruñidas con surcos en la superficie interna y con franjas al exterior son mucho menos frecuentes. El repertorio formal no difiere del conocido para el Bronce Final del centro y sur de la Península Ibérica. Los datos permiten proponer una cronologia del inicio del 1 milenio a.n.e. (siglo IX para esta ocupación.

  13. Dissecting mitochondrial dna variability of balearic populations from the bronze age to the current era.

    Science.gov (United States)

    Simón, Marc; Díaz, Nancy; Solórzano, Eduvigis; Montiel, Rafael; Francalacci, Paolo; Malgosa, Assumpció

    2017-01-01

    To determine ancient population influences on ancient and current Balearic populations and to reconstruct their mitochondrial DNA (mtDNA) gene pool evolution. We analyzed 239 individuals belonging to five archaeological populations from Majorca and Minorca, four dating to the transition between the Bronze Age and the Iron Age, and one Late Roman Majorcan population. Six additional individuals from Santa Teresa di Gallura from the Nuragic period were characterized and added to the existing samples from that culture to make comparisons with Talaiotic populations. We characterized the haplogroups of 138 individuals and obtained 69 sequences from mtDNA hypervariable region I. In the intra-island study, the apparent differences in social and funerary rites between two contiguous Majorcan necropolises were correlated with genetic characteristics. Also, the likely occurrence of consanguinity in a population with a very particular burial pattern was supported by genetic data. Despite the uniqueness of each necropolis, the global comparison of the five necropolises revealed no significant differences between them, or between ancient and modern populations from the islands. Ancient Balearics showed a similar mtDNA gene pool to Ancient Catalans, had a Near Eastern component, and showed continuity with European populations since at least the Bronze Age. We characterized five Balearic necropolises in the context of their geographic and cultural characteristics. The similarity between ancient Balearic and ancient Catalan gene pools reinforces their known historic interactions, while the lack of a consistent genetic continuity with Ancient Sardinians suggests that Talaiotic and Nuragic cultures arose in differentiated populations. Am. J. Hum. Biol. 29:e22883, 2017. © 2016 Wiley Periodicals, Inc. © 2016 Wiley Periodicals, Inc.

  14. Archaeological fieldwork in the Bronze Age site of Cerro de la Encina (Monachil, Granada

    Directory of Open Access Journals (Sweden)

    Aranda Jiménez, Gonzalo

    2005-06-01

    Full Text Available New archaeological fieldwork has been carried out from November 2003 to May 2004 in the Bronze Age site of Cerro de la Encina, due to the interest of the regional government of Andalusia in displaying the settlement for visitors. The aim of this fieldwork has been the systematic excavation of a large settlement area partially known thanks to the excavations developed at the beginning of 1980s. A first toccupation period belonging to the Argaric Culture has been documented, highlighting specially the funerary ritual characterized by individual inhumations located below dwellings. After a gap in the occupation of the settlement a new social group belonging to the Late Bronze Age Culture of Southeast of Spain inhabits the Cerro de la Encina.

    El interés de la Consejería de Cultura de la Junta de Andalucía por la musealización del yacimiento del Cerro de la Encina ha motivado el desarrollo de nuevas investigaciones arqueológicas cuya primera fase se ha desarrollado entre Noviembre de 2003 y Mayo de 2004. Los trabajos han consistido en la excavación sistemática de un área de poblado de grandes dimensiones parcialmente conocida por las investigaciones realizadas a principios de los años 80. Los resultados han sido del máximo interés documentándose un primer momento de ocupación perteneciente a la Cultura de El Argar en el que destaca su espectacular registro funerario integrado dentro de las áreas de habitación. Tras un periodo de abandono del yacimiento se produce una nueva ocupación correspondiente a una comunidad del Bronce Final del Sureste.

  15. Por une releture du Marco Polo de Paul Vidal de La Blache

    Directory of Open Access Journals (Sweden)

    Guy Mercier

    1998-06-01

    Full Text Available RE-READING PAUL VIDAL DE LA BLACHE'S MARCO POLO - Although Paul Vidal de La Blache's work has been widely commented upon, his first works are barely known. This is the case, for instance, of his first book, "Marco Polo. Son temps et ses voyages", published in 1880. My purpose is to analyse the geographical content of that book and to elaborate a hypothesis as to its role in the institutionalisation of Vidalian thought.

  16. Synthesis of hydrogen tungsten bronzes H{sub x}WO{sub 3} by reactive mechanical milling of hexagonal WO{sub 3}

    Energy Technology Data Exchange (ETDEWEB)

    Castro, Facundo J. [Centro Atomico Bariloche (CNEA, CONICET), Instituto Balseiro (UNCuyo), Av. Bustillo 9500, San Carlos de Bariloche (Argentina); Tonus, Florent; Bobet, Jean-Louis [Institut de Chimie de la Matiere Condensee de Bordeaux (ICMCB), CNRS (UPR 9048), Universite de Bordeaux I, 87 Avenue du Dr. A. Schweitzer, 33608 Pessac Cedex (France); Urretavizcaya, Guillermina, E-mail: urreta@cab.cnea.gov.a [Centro Atomico Bariloche (CNEA, CONICET), Instituto Balseiro (UNCuyo), Av. Bustillo 9500, San Carlos de Bariloche (Argentina)

    2010-04-16

    Recently, we have reported the formation of hydrogen tungsten bronzes by reactive mechanical milling monoclinic tungsten (VI) oxide under hydrogen atmosphere. In this work we report the milling of hexagonal WO{sub 3} under H{sub 2} atmosphere. Our main results are the structural transformation of the hexagonal oxide to the high temperature polymorph of WO{sub 3} with orthorhombic structure, and the formation of different hydrogen tungsten bronzes at distinct milling times. The bronzes seem to be formed from the orthorhombic oxide, and compared with the bronzes obtained by milling monoclinic WO{sub 3} are rather unstable after short exposure to air. The materials are characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and total hydrogen content determination.

  17. Food offerings, flowers, a bronze bucket and a waggon: a multidisciplinary approach regarding the Hallstatt princely grave from Prague-Letňany, Czech Republic

    Czech Academy of Sciences Publication Activity Database

    Kozáková, Radka; Kyselý, René; Trefný, M.; Drábková, K.; Kočár, Petr; Frolíková, Drahomíra; Kočárová, R.; Moravcová, Kamila

    -, - (2017) ISSN 1866-9557 Institutional support: RVO:67985912 Keywords : grave * meat offerings * pollen * bronze bucket * paint * infrared spectroscopy * xylotomic analysis Subject RIV: AC - Archeology, Anthropology, Ethnology Impact factor: 1.844, year: 2016

  18. The scavenger receptor MARCO is involved in Leishmania major infection by CBA/J macrophages.

    Science.gov (United States)

    Gomes, I N; Palma, L C; Campos, G O; Lima, J G B; DE Almeida, T F; DE Menezes, J P B; Ferreira, C A G; Santos, R R Dos; Buck, G A; Manque, P A M; Ozaki, L S; Probst, C M; DE Freitas, L A R; Krieger, M A; Veras, P S T

    2009-04-01

    CBA/J mice are resistant to Leishmania major infection but are permissive to L. amazonensis infection. In addition, CBA/J macrophages control L. major but not L. amazonensis infection in vitro. Phagocytosis by macrophages is known to determine the outcome of Leishmania infection. Pattern recognition receptors (PRR) adorning antigen presenting cell surfaces are known to coordinate the link between innate and adaptive immunity. The macrophage receptor with collagenous structure (MARCO) is a PRR that is preferably expressed by macrophages and is capable of binding Gram-positive and Gram-negative bacteria. No research on the role of MARCO in Leishmania-macrophage interactions has been reported. Here, we demonstrate, for the first time, that MARCO expression by CBA/J macrophages is increased in response to both in vitro and in vivo L. major infections, but not to L. amazonensis infection. In addition, a specific anti-MARCO monoclonal antibody reduced L. major infection of macrophages by 30%-40% in vitro. The draining lymph nodes of anti-MARCO-treated mice displayed a reduced presence of immunolabelled parasite and parasite antigens, as well as a reduced inflammatory response. These results support the hypothesis that MARCO has a role in macrophage infection by L. major in vitro as well as in vivo.

  19. SUSCEPTIBILIDAD GENÉTICA AL CÁNCER: ALGUNAS CONSIDERACIONES BIOÉTICAS BAJO EL MARCO LEGAL VENEZOLANO

    Directory of Open Access Journals (Sweden)

    CARLOS JG. FLORES-ANGULO

    2010-01-01

    Full Text Available El cáncer es una enfermedad que se caracteriza por la proliferación rápida e incontro- lada de las células. Existen varios factores de riesgo asociados, entre ellos, el hereditario tal vez sea el más importante, ya que, aunque el fenotipo tiene una gran dependencia de las condiciones ambientales, la base de la carcinogénesis es el daño genético no letal. En este sentido, el estudio de los marcadores genéticos de susceptibilidad adquiere capital importancia, ya que estos permiten identificar a los individuos con alto riesgo genético, estimar su pronóstico y respuesta al tratamiento, adquiriendo la medicina un carácter más predictivo y preventivo. No obstante, esto podría desencadenar problemas éticos de gran impacto, especialmente difíciles de solucionar en una sociedad carente de un marco legal adecuado. Es importante, así, realizar un análisis del Sistema Legal Venezolano (SLV que protege la información del genoma humano y sus repercusiones bioéticas. Para ello, se realizó una búsqueda e interpretación del marco normativo venezolano vigente, de publicaciones inherentes al cáncer, su susceptibilidad y tecno- logía diagnóstica. Las conclusiones derivadas son: 1 No es recomendable la oferta masiva de pruebas para la detección de riesgo genético debido a sus repercusiones psicosociales y laborales, 2 El desarrollo del SLV vinculado a la protección del genoma es bastante limitado, y 3 Es necesaria la adecuación del SLV al inminente desarrollo científico, para así controlar el impacto bioético de la información obtenida y garantizar el acceso a un asesoramiento genético, psicológico y legal, para así, establecer puntual- mente el marco de responsabilidades.

  20. Sciades herzbergii oxidative stress biomarkers: an in situ study of an estuarine ecosystem (São Marcos' Bay, Maranhão, Brazil

    Directory of Open Access Journals (Sweden)

    Raimunda Nonata Fortes Carvalho-Neta

    2010-01-01

    Full Text Available In order to study the effects of environmental contamination on wild fish, sites were sampled in São Marcos' Bay. The first is located near the ALUMAR/ALCOA port, a potentially contaminated area. The second, located near the Coqueiro beach, was used as a reference area. The activity of antioxidant defence catalase (CAT and glutathione S-transferase (GST in S. herzbergii was compared with the biometric data and gonadosomatic index (GSI. The result showed that GSI decreased significantly in females (pO objetivo desse trabalho foi estudar os efeitos da contaminação ambiental em peixes amostrados em dois locais da Baía de São Marcos. O primeiro ponto está localizado próximo ao porto da ALUMAR/ALCOA, considerado como uma área potencialmente contaminada. O segundo ponto, situado na praia do Coqueiro, foi usado como uma área de referência. Dados da atividade da enzima de defesa antioxidante catalase (CAT e da glutationa S-transferase (GST em S. herzbergii foram comparados com os dados biométricos e o índice gonadossomático (GSI. Resultados mostraram que o GSI diminuiu significativamente em fêmeas (p <0.05 no local contaminado. A atividade da CAT foi mais alta nos peixes do local contaminado. Uma diferença significativa foi observada na atividade de GST de S. herzbergii no local contaminado e no local de referência (p <0.05. GSI possibilitou uma nova abordagem quanto à natureza da resposta de destoxificação nessa espécie de bagre porque este índice não apresentou correlação com as enzimas no local potencialmente contaminado, mas apresentou no local de referência. Assim, sugere-se que a boa correlação da GST/CAT e GSI poderia estar relacionada à reprodução dos animais no local de referência, mas não no local potencialmente contaminado. Se esse for o caso, pode-se concluir que GST/CAT e GSI podem ser utilizados como bons biomarcadores para avaliar contaminação aquática.

  1. Marco Polo, Nicknamed the Million, and His “Book on the Diversity of the World”

    Directory of Open Access Journals (Sweden)

    A.N. Garkavets

    2017-09-01

    Full Text Available Objective: To highlight the most urgent problems related to the person of Marco Polo and his works, written in collaboration with Rustichano (commonly known as Rustichello of Pisa. Research materials: the work of Marco Polo, with attention drawn to its general characteristics and scientific value. Materials are used which describe the history of the Polo family and the biography of Marco Polo the traveler. This work explores the routes of Polo’s travels, his career success in China and his documentary information about the country in the era of the Mongol Yuan Dynasty. We explore his language proficiency, in particular regard to the “Tatar” language in light of the source for the “Tatar” Lord Prayer in edition of Marco Polo in a German translation of Jerome Megizer; the return-route from China to Ilkhanate of the Hulaguides; the introduction of paper money in Mongol Iran at that time; Marco’s return to Venice and his acquaintance with the novelist, Rustichano of Pisa, while in Genoese captivity; versions of their joint writing on the East; Rustichano and scribes’ additions to the memoirs of Marco; the debated date of the will of Marco Polo and the mystery of two gold items listed in the inventory of his property, which are identified as two of Gaykhatu’s golden paizas; Marco Polo’s connections to the discovery of America by Christopher Columbus and Amerigo Vespucci; fake maps of China, Japan, Sakhalin, the Aleutian Islands, Chukotka, Alaska and much of the North American West, attributed to Marco Polo. Results and novelty of the research: We have confirmed the hypothesis about the origin of the generic nickname Million, received by Polos, and its connection to the estate of the Venetian family, Vilione / Milione. We have identified the source of the “Tatar” Lord Prayer in the German edition of Marco Polo. We have raised the question of the participation of Polo in the printing of paper money by Gaykhatu. We have proved the

  2. In situ study of the Porticello Bronzes by portable X-ray fluorescence and laser-induced breakdown spectroscopy

    Science.gov (United States)

    Ferretti, M.; Cristoforetti, G.; Legnaioli, S.; Palleschi, V.; Salvetti, A.; Tognoni, E.; Console, E.; Palaia, P.

    2007-12-01

    This paper reports the results of a measurement campaign performed at the National Museum of Magna Grecia in Reggio Calabria (Italy). Portable X-Ray Fluorescence (XRF) and Laser-Induced Breakdown Spectroscopy (LIBS) instrumentation allowed in situ analysis of several bronze pieces belonging to the group of the so-called Porticello Bronzes. The find occurred at sea, off the village of Porticello (Reggio Calabria) in 1969 and consists of a number of fragments, including a bearded head, pertaining to at least two statues. The use of X-Ray Fluorescence and Laser-Induced Breakdown Spectroscopy techniques allowed for a classification of the fragments according to their elemental composition. The fragments appear to belong to at least two different statues; although, in general, the compositional classification agrees well with the stylistic analysis of the fragments, significant improvements with respect to previous achievements emerge from the joint results of the two techniques used.

  3. Dynamic secondary ion mass spectrometry and X-ray photoelectron spectroscopy on artistic bronze and copper artificial patinas

    Science.gov (United States)

    Balta, I. Z.; Pederzoli, S.; Iacob, E.; Bersani, M.

    2009-04-01

    To prevent the natural processes of decay and to develop and improve the treatments of conservation and restoration of artistic bronzes meaning statues and sculptures, it is important understanding the patination processes and the knowledge of artificially corroded surfaces. Chemical and physical characterization of artificial patinas obtained on artistic bronzes and coppers by using the 19th century Western traditional patination techniques and recipes by means of SEM-EDS, light microscopy and ATR/FT-IR has been done in previous studies [I.Z. Balta, L. Robbiola, Characterization of artificial black patinas on artistic cast bronze and pure copper by using SEM-EDS and light microscopy, in: Proceedings of the 13th European Microscopy Congress, 22-27 August 2004, Antwerp, Belgium, EMC 2004 CD-Rom Conference Preprints; I.Z. Balta, L. Robbiola, Traditional artificial artistic bronze and copper patinas—an investigation by SEM-EDS and ATR/FT-IR, in: Proceedings of the 8th International Conference on Non Destructive Investigations and Microanalysis for the Diagnostics and Conservation of the Cultural and Environmental Heritage, 15-19 May 2005, Lecce, Italy, ART'05 CD-Rom Conference Preprints]. Differences in morphology (structure, thickness, porosity, adherence, compactity, uniformity, homogeneity) and also in composition, on both artistic cast bronze and pure copper patinas, were clearly evidenced. Further in-depth investigation is required to be carried out in order to better understand the patinas mechanisms of formation and the layers kinetics of growth. The elemental and chemical analysis, either on a surface monolayer or in a depth profile, by using the Secondary Ion Mass Spectrometry (SIMS) and X-ray Photoelectron Spectroscopy (XPS) techniques, can provide this kind of information, unique at trace-level sensitivity. SIMS has proved to be a suitable analytical technique for analyzing small amounts of material with high atomic sensitivity (ppm or even ppb) and high

  4. In situ study of the Porticello Bronzes by portable X-ray fluorescence and laser-induced breakdown spectroscopy

    Energy Technology Data Exchange (ETDEWEB)

    Ferretti, M. [Istituto per le Tecnologie Applicate ai Beni Culturali, Via Salaria, km 29.300, c.p.10, 00016 Monterotondo St. - Roma (Italy); Cristoforetti, G.; Legnaioli, S. [Applied Laser Spectroscopy Laboratory, Istituto per i Processi Chimico Fisici del CNR, Area di Ricerca di Pisa, Via G.Moruzzi, 1-56124 Pisa (Italy); Palleschi, V. [Applied Laser Spectroscopy Laboratory, Istituto per i Processi Chimico Fisici del CNR, Area di Ricerca di Pisa, Via G.Moruzzi, 1-56124 Pisa (Italy); Salvetti, A.; Tognoni, E. [Applied Laser Spectroscopy Laboratory, Istituto per i Processi Chimico Fisici del CNR, Area di Ricerca di Pisa, Via G.Moruzzi, 1-56124 Pisa (Italy); Console, E. [T.E.A. s.a.s., Via Luigi Pascali, 23/25-88100 Catanzaro (Italy)], E-mail: elena@teacz.191.it; Palaia, P. [T.E.A. s.a.s., Via Luigi Pascali, 23/25-88100 Catanzaro (Italy)

    2007-12-15

    This paper reports the results of a measurement campaign performed at the National Museum of Magna Grecia in Reggio Calabria (Italy). Portable X-Ray Fluorescence (XRF) and Laser-Induced Breakdown Spectroscopy (LIBS) instrumentation allowed in situ analysis of several bronze pieces belonging to the group of the so-called Porticello Bronzes. The find occurred at sea, off the village of Porticello (Reggio Calabria) in 1969 and consists of a number of fragments, including a bearded head, pertaining to at least two statues. The use of X-Ray Fluorescence and Laser-Induced Breakdown Spectroscopy techniques allowed for a classification of the fragments according to their elemental composition. The fragments appear to belong to at least two different statues; although, in general, the compositional classification agrees well with the stylistic analysis of the fragments, significant improvements with respect to previous achievements emerge from the joint results of the two techniques used.

  5. Application of X-Ray and Neutron Tomography to Study Antique Greek Bronze Coins with a High Lead Content

    Science.gov (United States)

    Griesser, M.; Traum, R.; Vondrovec, K.; Vontobel, P.; Lehmann, E. H.

    2012-07-01

    Highly leaded bronze coins of the Coin Cabinet of the Kunsthistorisches Museum (KHM) show progressive corrosion as a result of unfavourable storage conditions within historic wooden cases. In connection to a research project concerning the preservation and conservation of the antique coins the causes for the sometimes severe corrosion were studied by different analytical techniques. Radiography and tomography investigations using neutrons and X-rays were performed at the Paul Scherrer Institute, i.e. the enrichment of lead in the interior of the objects was studied in a nondestructive manner. The tomography results obtained show that in addition to the lead rich areas on the obverse and reverse of the coins (often already clearly visible on the surface due to the formation of white corrosion products) a varying number of lead containing inclusions could be detected within the antique bronze coins. In addition, some information on their casting technique could be gained.

  6. Magnetization and Inter-Filament Contact in HEP and ITER Bronze-Route Nb(3)Sn Wires

    CERN Document Server

    Bordini, B; Devred, A; Richter, D; Bessette, D; Jewell, M; Bottura, L

    2011-01-01

    Magnetization measurements are relevant tests for the characterization of superconductors. Practically they are the only measurements that allow estimating the critical current density at low fields of low temperature superconductors, the effective filament size and the hysteresis losses. For this purpose CERN, in collaboration with the University of Geneva, has carried out magnetization measurements on five types of Nb(3)Sn wires: three bronze route strands used in the ITER project; one Powder In Tube (PIT) and one Internal Tin (IT) wires used for developing next generation accelerator magnets. The field dependent magnetization has been determined using three setups: a Vibrating Sample Magnetometer (VSM), a Superconducting Quantum Interference Device (SQUID) and a special system used for the production control of LHC strands. Samples of different lengths have been tested to check the different coupling between the filaments. Unexpectedly, it was found that the magnetization of the tested bronze wires was str...

  7. Magnetization and Inter-Filament Contact in HEP and ITER Bronze-Route Nb3Sn Wires

    CERN Document Server

    Bordini, B; Bottura, L; Devred, A; Jewell, M; Richter, D; Senatore, C

    2011-01-01

    Magnetization measurements are relevant tests for the characterization of superconductors. Practically they are the only measurements that allow estimating the critical current density at low fields of low temperature superconductors, the effective filament size and the hysteresis losses. For this purpose CERN, in collaboration with the University of Geneva, has carried out magnetization measurements on five types of Nb3Sn wires: three bronze route strands used in the ITER project; one Powder In Tube (PIT) and one Internal Tin (IT) wires used for developing next generation accelerator magnets. The field dependent magnetization has been determined using three set-ups: a Vibrating Sample Magnetometer (VSM), a Superconducting Quantum Interference Device (SQUID) and a special system used for the production control of LHC strands. Samples of different lengths have been tested to check the different coupling between the filaments. Unexpectedly, it was found that the magnetization of the tested bronze wires was stro...

  8. Critical Role of MARCO in Crystalline Silica–Induced Pulmonary Inflammation

    Science.gov (United States)

    Thakur, Sheetal A.; Beamer, Celine A.; Migliaccio, Christopher T.; Holian, Andrij

    2009-01-01

    Chronic exposure to crystalline silica can lead to the development of silicosis, an irreversible, inflammatory and fibrotic pulmonary disease. Although, previous studies established the macrophage receptor with collagenous structure (MARCO) as an important receptor for binding and uptake of crystalline silica particles in vitro, the role of MARCO in regulating the inflammatory response following silica exposure in vivo remains unknown. Therefore, we determined the role of MARCO in crystalline silica–induced pulmonary pathology using C57Bl/6 wild-type (WT) and MARCO−/− mice. Increased numbers of MARCO+ pulmonary macrophages were observed following crystalline silica, but not phosphate-buffered saline and titanium dioxide (TiO2), instillation in WT mice, highlighting a specific role of MARCO in silica-induced pathology. We hypothesized that MARCO−/− mice will exhibit diminished clearance of silica leading to enhanced pulmonary inflammation and exacerbation of silicosis. Alveolar macrophages isolated from crystalline silica–exposed mice showed diminished particle uptake in vivo as compared with WT mice, indicating abnormalities in clearance mechanisms. Furthermore, MARCO−/− mice exposed to crystalline silica showed enhanced acute inflammation and lung injury marked by increases in early response cytokines and inflammatory cells compared with WT mice. Similarly, histological examination of MARCO−/− lungs at 3 months post–crystalline silica exposure showed increased chronic inflammation compared with WT; however, only a small difference was observed with respect to development of fibrosis as measured by hydroxyproline content. Altogether, these results demonstrate that MARCO is important for clearance of crystalline silica in vivo and that the absence of MARCO results in exacerbations in innate pulmonary immune responses. PMID:19151164

  9. Creativity in the Bronze Age: bringing archaeological research into contemporary craft teaching and learning through a live project

    OpenAIRE

    Persad, Rachel; Sofaer, Joanna

    2016-01-01

    The CinBA Live Project sought to engage students of contemporary craft courses in the UK with Bronze Age creativity. We aimed to explore the ways in which the creativity inherent in prehistoric craft may be used as inspiration in contemporary making. It simultaneously offered institutions a unique opportunity to offer a practice-led, research-based live project which was distinct to those generally known to be available to art and design institutions. It offered a different experience within ...

  10. Analysis of the Causes of Cracks in a Thick-Walled Bush Made of Die-Cast Aluminum Bronze

    Directory of Open Access Journals (Sweden)

    Pisarek B.P.

    2016-12-01

    Full Text Available For the die casting conditions of aluminium bronzes assumed based on the literature data, a thick-walled bush was cast, made of complex aluminium bronze (Cu-Al-Fe-Ni-Cr. After the cast was removed from the mould, cracks were observed inside it. In order to identify the stage in the technological production process at which, potentially, the formation of stresses damaging the continuity of the microstructure created in the cast was possible (hot cracking and/or cold cracking, a computer simulation was performed. The article presents the results of the computer simulation of the process of casting the material into the gravity die as well as solidifying and cooling of the cast in the shape of a thick-walled bush. The simulation was performed with the use of the MAGMA5 program and by application of the CuAl10Ni5,5Fe4,5 alloy from the MAGMA5 program database. The results were compared with the location of the defects identified in the actual cast. As a result of the simulation of the die-casting process of this bush, potential regions were identified where significant principal stresses accumulate, which can cause local hot and cold cracking. Until now, no research has been made of die-cast aluminium bronzes with a Cr addition. Correlating the results of the computer simulation validated by the analysis of the actual cast made it possible to clearly determine the critical regions in the cast exposed to cracking and point to the causes of its occurrence. Proposals of changes in the bush die casting process were elaborated, in order to avoid hot tearing and cold cracking. The article discusses the results of preliminary tests being a prologue to the optimization of the die-casting process parameters of complex aluminium bronze thick-walled bushs.

  11. Neutron-based analyses of three Bronze Age metal objects: a closer look at the Buggenum, Jutphaas and Escharen artefacts

    OpenAIRE

    POSTMA HANS; AMKREUTZ LUC; FONTIJN D.; Kamermans, H.; Kockelmann, W.; SCHILLEBEECKX PETER; VISSER DIRK

    2017-01-01

    Three important Bronze Age copper-alloy artefacts from the permanent exhibition of the National Museum of Antiquity in Leiden (NL) have been studied by neutron-based methods. These artefacts are known as the Buggenum sword, the Jutphaas dirk, and the Escharen double axe. All three objects have been studied with neutron resonance capture analysis (NRCA), a non-destructive method to determine the bulk elemental compositions. The Buggenum sword is also studied with time-of-flight neutron diffrac...

  12. Bones from the labyrinth: Faunal evidence for management and consumption of animals at Neolithic and Bronze Age Knossos, Crete.

    OpenAIRE

    Isaakidou, V.

    2005-01-01

    Animals feature extensively in the iconography and written records of Bronze Age Crete, and in archaeological debates ranging from initial colonisation in the 7th millennium BC, through expansion of settlement across the island in the 4th-3rd millennia, to surplus mobilisation and feasting by the 2nd millennium palaces. To date, however, faunal remains---the most widely available evidence for human use of animals---have been neglected: detailed reports of large assemblages are non-existent an...

  13. Tooth wear pattern analysis in a sample of Italian Early Bronze Age population. Proposal of a 3-D sampling sequence.

    Science.gov (United States)

    Masotti, Sabrina; Bogdanic, Nika; Arnaud, Julie; Cervellati, Franco; Gualdi-Russo, Emanuela

    2017-02-01

    The purpose of this study was to assess the prevalence, distribution and intensity of tooth wear in a sample of an ancient Italian population in order to explain the pattern in terms of dietary habits and/or non-dietary tooth-use behaviors during the Early Bronze Age, with a focus on possible age-group and sex differences. Well-preserved permanent teeth of individuals from the Bronze Age site of Ballabio (Lecco) in northern Italy were examined for tooth wear by different methods. Eight 3D models of teeth at increasing severity of wear were created. In total, 357 permanent teeth belonging to male and female individuals were included in the study. Dental wear was present in 96.6% of the total sample. Males showed significantly greater levels of wear than females in the mandibular teeth. Both sexes exhibited a significantly different wear direction between the anterior (oblique and flat) and posterior (oblique and concave) teeth. Significant age differences were observed in the direction and level of wear in the incisors, canines and premolars, with higher wear in the older group. Complete and rotatable virtual 3D images of different wear patterns are proposed. The findings of the present study confirm the data from archaeological studies on this site and on northern Italian habits during the Early Bronze Age suggesting a diet rich in vegetables. The observed wear patterns can be related both to the diet of this Bronze age population, based on hard and abrasive food requiring vigorous mastication, and to sex differences in cultural practices. Copyright © 2016 Elsevier Ltd. All rights reserved.

  14. The maternal genetic make-up of the Iberian Peninsula between the Neolithic and the Early Bronze Age

    OpenAIRE

    Szécsényi-Nagy, Anna; Roth, Christina; Brandt, Guido; Rihuete-Herrada, Cristina; Tejedor-Rodríguez, Cristina; Held, Petra; García-Martínez-de-Lagrán, Íñigo; Arcusa Magallón, Héctor; Zesch, Stephanie; Knipper, Corina; Bánffy, Eszter; Friederich, Susanne; Meller, Harald; Bueno Ramírez, Primitiva; Barroso Bermejo, Rosa

    2017-01-01

    Agriculture first reached the Iberian Peninsula around 5700 BCE. However, little is known about the genetic structure and changes of prehistoric populations in different geographic areas of Iberia. In our study, we focus on the maternal genetic makeup of the Neolithic (~ 5500–3000 BCE), Chalcolithic (~ 3000–2200 BCE) and Early Bronze Age (~ 2200–1500 BCE). We report ancient mitochondrial DNA results of 213 individuals (151 HVS-I sequences) from the northeast, central, southeast and southwest ...

  15. Da escuridão para a luz: origem e extensão da Bíblia em braille no Brasil. Dissertação

    Directory of Open Access Journals (Sweden)

    Marcos Adriano Lovera

    2013-12-01

    Full Text Available LOVERA, Marcos Adriano. Da escuridão para a luz: origem e extensão da Bíblia em braille no Brasil. Dissertação (Mestrado 2013. 176p. - Pontifícia Universidade Católica de Minas Gerais, Programa de Pós-graduação em Ciências da Religião, Belo Horizonte

  16. Radar Tomography of Asteroids ASSERT / Marco Polo-R

    Science.gov (United States)

    Herique, A.; Zine, S.; Barucci, A.; Biele, J.; Ho, T.; Kofman, W. W.; Krause, C.; Michel, P.; Plettemeier, D.; Prado, J.; Souyris, J.; Ulamec, S.; Assert Team

    2011-12-01

    The internal structure of NEAs remains largely unknown. It is a key point for the understanding of asteroid accretion and dynamical evolution. From a science point of view, the internal structure is also a key point for the understanding of asteroid accretion and dynamical evolution. For risk management and mitigation, it is required to characterize whether a small asteroid will survive the transit through the atmosphere and also to define a deflection policy. There are some indirect evidences that a rubble pile structure is really common at least for objects larger than a few hundreds of meters in diameter. But a more precise characterisation of the internal structure is required, such as the size and the structure of the main blobs and their distribution within the NEAs main body as well as a statistical characterisation of the surface regolith in term of density and size distribution. Radar tomography is the only way to image the internal structure from decimetric to global scale in order to better understand the nature of the primary object and its posterior alterations. It is also a way to estimate the ratio between micro- and macro-porosity. Bistatic radar tomography is an original technique, developed with the CONSERT Experiment (Rosetta / ESA) to image ant characterize the internal structures of 67P/Churyumov-Gerasimeko with a signal transmitted from the Orbiter to the Lander. By regards to a more classical monostatic radar like Marsis (MarsExpress/ESA), this bistatic configuration requires limited resources (mass, power and dataflow) and increases the capacity of deep sounding. So ASSERT (ASteroid Sounding Experiment by Radiowave Transmission) is proposed to instrument a MASCOT-type lander e.g. as payload of the ESA Marco Polo R mission (ESA). The first addressed question is a rubble pile or a monolithic body: For a rubble pile, the tomography will allow to estimate the size distribution of the boulders by direct imaging or statistical analysis of the

  17. Bronze Age metal artefacts found on Cyprus - metal from Anatolia and the Western Mediterranean

    Directory of Open Access Journals (Sweden)

    Stos-Gale, Zofia A.

    2010-12-01

    Full Text Available Hundreds of Bronze Age metal artefacts excavated on archaeological sites in Cyprus have been analysed for their lead isotope and elemental composition in the Isotrace Laboratory, University of Oxford, in the years 1982-2002. In parallel, but in particular after 1995, hundreds of samples of minerals and slags collected from the mines and smelting sites around the Troodos Mountains were also analysed. Most of the results were published in various articles over the years, but the interpretation of some of the lead isotope data needs a current revision in view of new research conducted in Spain, Sardinia and southern France. It has been known that the lead isotope data for metal artefacts from the Cypriot Bronze Age sites shows that not all of the copper is consistent with origin from the Cypriot ores. In addition, the lead and silver artefacts found there must have been imported, because there are no lead or silver ores on Cyprus. The re-evaluation of the data shows that about 11 % of the analysed metal artefacts are consistent with the origin from the deposits in the Aegean and Turkey, while about 14 % with sources in the Western Mediterranean. This paper discusses in detail the current interpretation of the research into the sources of imported metal found in the Bronze Age context on Cyprus.

    Cientos de objetos de metal de la Edad del Bronce excavados en yacimientos de Chipre han sido analizados para conocer su composición elemental y sus isótopos de plomo en el Isotrace Laboratory de la Universidad de Oxford entre los años 1982 y 2002. Especialmente con posterioridad a 1995 cientos de muestras de minerales y escorias recogidas de minas y sitios de reducción de minerales localizadas en el entorno de las montañas de Troodos también fueron analizadas. La mayoría de los resultados fueron publicados en varios artículos a lo largo del tiempo, pero la interpretación de algunos análisis de isótopos de plomo necesitan de una revisión a

  18. The Bronze Age in the Northwestern of Iberian Peninsula: an analysis from funerary practices

    Directory of Open Access Journals (Sweden)

    Bettencourt, Ana M. S.

    2010-06-01

    Full Text Available From the analysis of the funerary practices and of their integration in the different chronological-cultural contexts where they develop, the author works out a new interpretation of the mechanism of negotiation of power and the promotion of social identity through the Bronze Age of the NW Iberian Peninsula. When studying an area so wide she distinguishes two great trends in the type and distribution of the funerary architectures throughout the Bronze Age that she associates with different ways of interaction with, and perception of, the world. Thus, she argues that the necropolises of “cloudy” tombs (cists without tumuli, plain graves and pits, located in areas of great agricultural potential and close to the settlements, may have been constructed by sedentary communities, very involved in agricultural activities, with a great sense of territoriality and a great control over, and deep knowledge of, the territory. On the other hand the communities involved with mountain landscapes, eventually more related to cattle and with ways of life that would imply greater mobility, were responsible for the construction of more visible funerary structures, such as small tumuli of megalithic tradition, located away from the settlements. In relation to the social role of the corpse, the author argues for the Early Bronze Age, that, the occupation of new territories, the emergence of a new form of community interaction with the environment and the emergence of new mechanisms of power and legitimacy of the territory were materialized in burial practices and in the social role of some corpses, in copper and gold grave goods. This social role was represented in old and new places. From the Middle Bronze Age she assumes that the corpse loses importance in collective terms and that death becomes more familiar. The new settings of power negotiation and social identity are transferred to other contexts of action more connected with the sphere of the living

  19. Marco Polo: Hunting and Capture of Material from a Primitive Asteroid

    Science.gov (United States)

    Licandro, Javier

    A description of the Spanish contribution to the Marco Polo mission and of the mission itself is presented. Marco Polo is a joint European-Japanese mission of sample return from a Near Earth Object (NEO). Submitted to ESA on July 2007 in the framework of the Cosmic Vision 2015-2025, Marco Polo passed the first evaluation process on October 2007. Seventeen Spanish researchers belonging to six Spanish institutes signed the proposal. The mission is planned to visit a primitive NEO, belonging to a class that cannot be related to known meteorite types, to characterize it at multiple scales, and to bring samples back to Earth. Marco Polo will give us the first opportunity for detailed laboratory study of the most primitive materials that formed the planets. This will allow us to improve our knowledge on the processes which governed the origin and early evolution of the Solar System, and possibly of the life on Earth. Three Spanish institutes are involved in the feasibility studies of two instruments: the THERmal MAPper (THERMAP) and the Marco Polo Camera System (MPCS).

  20. The aquatic annelid fauna of the San Marcos River headsprings, Hays County, Texas.

    Science.gov (United States)

    Worsham, McLean L D; Gibson, Randy; Huffman, David G

    2016-01-01

    The San Marcos River in Central Texas has been well studied and has been demonstrated to be remarkably specious. Prior to the present study, research on free-living invertebrates in the San Marcos River only dealt with hard bodied taxa with the exception of the report of one gastrotrich, and one subterranean platyhelminth that only incidentally occurs in the head spring outflows. The remainder of the soft-bodied metazoan fauna that inhabit the San Marcos River had never been studied. Our study surveyed the annelid fauna and some other soft-bodied invertebrates of the San Marcos River headsprings. At least four species of Hirudinida, two species of Aphanoneura, one species of Branchiobdellida, and 11 (possibly 13) species of oligochaetous clitellates were collected. Other vermiform taxa collected included at least three species of Turbellaria and one species of Nemertea. We provide the results of the first survey of the aquatic annelid fauna of the San Marcos Springs, along with a dichotomous key to these annelids that includes photos of some representative specimens, and line drawings to elucidate potentially confusing diagnostic structures.

  1. Examination of MARCO activity on dendritic cell phenotype and function using a gene knockout mouse.

    Directory of Open Access Journals (Sweden)

    Hiroshi Komine

    Full Text Available We have reported the upregulation of MARCO, a member of the class A scavenger receptor family, on the surface of murine and human dendritic cells (DCs pulsed with tumor lysates. Exposure of murine tumor lysate-pulsed DCs to an anti-MARCO antibody led to loss of dendritic-like processes and enhanced migratory capacity. In this study, we have further examined the biological and therapeutic implications of MARCO expression by DCs. DCs generated from the bone marrow (bm of MARCO knockout (MARCO⁻/⁻ mice were phenotypically similar to DCs generated from the bm of wild-type mice and produced normal levels of IL-12 and TNF-α when exposed to LPS. MARCO⁻/⁻ DCs demonstrated enhanced migratory capacity in response to CCL-21 in vitro. After subcutaneous injection into mice, MARCO⁻/⁻ TP-DCs migrated more efficiently to the draining lymph node leading to enhanced generation of tumor-specific IFN-γ producing T cells and improved tumor regression and survival in B16 melanoma-bearing mice. These results support targeting MARCO on the surface of DCs to improve trafficking and induction of anti-tumor immunity.

  2. The aquatic annelid fauna of the San Marcos River headsprings, Hays County, Texas

    Directory of Open Access Journals (Sweden)

    McLean L.D. Worsham

    2016-09-01

    Full Text Available The San Marcos River in Central Texas has been well studied and has been demonstrated to be remarkably specious. Prior to the present study, research on free-living invertebrates in the San Marcos River only dealt with hard bodied taxa with the exception of the report of one gastrotrich, and one subterranean platyhelminth that only incidentally occurs in the head spring outflows. The remainder of the soft-bodied metazoan fauna that inhabit the San Marcos River had never been studied. Our study surveyed the annelid fauna and some other soft-bodied invertebrates of the San Marcos River headsprings. At least four species of Hirudinida, two species of Aphanoneura, one species of Branchiobdellida, and 11 (possibly 13 species of oligochaetous clitellates were collected. Other vermiform taxa collected included at least three species of Turbellaria and one species of Nemertea. We provide the results of the first survey of the aquatic annelid fauna of the San Marcos Springs, along with a dichotomous key to these annelids that includes photos of some representative specimens, and line drawings to elucidate potentially confusing diagnostic structures.

  3. A family of rare earth molybdenum bronzes: Oxides consisting of periodic arrays of interacting magnetic units

    Energy Technology Data Exchange (ETDEWEB)

    Schneemeyer, L.F. [Department of Chemistry, Montclair State University, Montclair, NJ 07043 (United States); Siegrist, T., E-mail: tsiegrist@fsu.edu [Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310 (United States); National High Magnetic Field Laboratory, Tallahassee, FL 32310 (United States); Besara, T. [National High Magnetic Field Laboratory, Tallahassee, FL 32310 (United States); Lundberg, M. [Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310 (United States); National High Magnetic Field Laboratory, Tallahassee, FL 32310 (United States); Sun, J. [Department of Chemical and Biomedical Engineering, FAMU-FSU College of Engineering, Tallahassee, FL 32310 (United States); Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6056 (United States); Singh, D.J. [Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6056 (United States)

    2015-07-15

    The family of rare earth molybdenum bronzes, reduced ternary molybdates of composition LnMo{sub 16}O{sub 44,} was synthesized and a detailed structural study carried out. Bond valence sum (BVS) calculations clearly show that the molybdenum ions in tetrahedral coordination are hexavalent while the electron count in the primitive unit cell is odd. Yet, measurements show that the phases are semiconductors. The temperature dependence of the magnetic susceptibility of samples containing several different rare earth elements was measured. These measurements verified the presence of a 6.5 K magnetic phase transition not arising from the rare earth constituent, but likely associated with the unique isolated ReO{sub 3}-type Mo{sub 8}O{sub 36} structural subunits in this phase. To better understand the behavior of these materials, electronic structure calculations were performed within density functional theory. Results suggest a magnetic state in which these structural moieties have an internal ferromagnetic arrangement, with small ~1/8 μ{sub B} moments on each Mo. We suggest that the Mo{sub 8}O{sub 36} units behave like pseudoatoms with spin 1/2 derived from a single hole distributed over the eight Mo atoms that are strongly hybridized with the O atoms of the subunit. Interestingly, while the compound is antiferromagnetic, our calculations suggest that a field-stabilized ferromagnetic state, if achievable, will be a narrow band half-metal. - Graphical abstract: LnMo{sub 16}O{sub 44} phases comprise corner sharing tetrahedral and octahedral molybdenum ions. The MoO{sub 6} octahedra form Mo{sub 8}O{sub 36} units that are well separated and act like pseudo-atoms, accommodating 11 electrons each. - Highlights: • Single crystal X-ray diffraction refinements of LnMo{sub 16}O{sub 44} single crystals for Ln=Ce, Pr, Nd, Tb, Dy and Ho. • DFT calculations based on LaMo{sub 16}O{sub 44}. • [Mo{sub 8}O{sub 36}] units behaving as superatoms with a net magnetic moment of 1 µ

  4. Alloy characterization of a 7th Century BC archeological bronze vase — Overcoming patina constraints using Monte Carlo simulations

    Energy Technology Data Exchange (ETDEWEB)

    Manso, M. [Laboratório de Instrumentação, Engenharia Biomédica e Fisica da Radiação (LIBPhys-UNL), Departamento de Fisica, Faculdade de Ciências e Tecnologias, Universidade Nova de Lisboa, 2829-516 Monte da Caparica (Portugal); Faculdade de Belas-Artes da Universidade de Lisboa, Largo da Academia Nacional de Belas-Artes, 1249-058 Lisboa (Portugal); Schiavon, N. [Hercules Laboratory, University of Évora, Palácio do Vimioso,Largo Marquês de Marialva 8, 7000-809 Évora Portugal (Portugal); Queralt, I. [Laboratory of X-ray Analytical Applications, Institute of Earth Sciences Jaume Almera, CSIC, Solé Sabaris s/n, 08028 Barcelona (Spain); Arruda, A.M. [Centro de Arqueologia da Universidade de Lisboa (UNIARQ), Alameda da Universidade, 1600-214 Lisboa (Portugal); Sampaio, J.M. [BioISI — Biosystems & Integrative Sciences Institute, Faculdade de Ciências da Universidade de Lisboa (Portugal); Brunetti, A., E-mail: brunetti@uniss.it [Department of Political Science and Communication, University of Sassari, Via Piandanna 2, 07100 Sassari (Italy)

    2015-05-01

    In this work we evaluate the composition of a bronze alloy using X-ray fluorescence spectrometry (XRF) and Monte Carlo (MC) simulations. For this purpose, a 7th Century BC archeological vase from the SW Iberian Peninsula, displaying a well formed corrosion patina was analyzed by means of a portable X-ray fluorescence spectrometer. Realistic MC simulations of the experimental setup were performed with the XRMC code package which is based on an intensive use of variance-reduction techniques and uses XRAYLIB a constantly updated X-ray library of atomic data. A single layer model was applied for simulating XRF of polished/pristine bronze whereas a two-or-three-layer model was developed for bronze covered respectively by a corrosion patina alone or coupled with a superficial soil derived crust. These simulations took into account corrosion (cerussite (PbCO{sub 3}), cuprite (Cu{sub 2}O), malachite (Cu{sub 2}CO{sub 3}(OH){sub 2}), litharge (PbO)) and soil derived products (goethite (FeO(OH)) and quartz (SiO{sub 2})) identified by means of X-ray diffraction and Raman micro analytical techniques. Results confirm previous research indicating that the XRF/Monte Carlo protocol is well suited when a two-layered model is considered, whereas in areas where the patina + soil derived products' crust is too thick, X-rays from the alloy substrate are not able to exit the sample. Quantitative results based on MC simulations indicate that the vase is made of a lead–bronze alloy: Mn (0.2%), Fe (1.0%), Cu (81.8%), As (0.5%), Ag (0.6%), Sn (8.0%) and Pb (8.0%). - Highlights: • We study an archeological bronze vase with patina corrosion using XRF spectrometry. • The experimental setup is modeled using Monte Carlo (MC) simulations. • Combining MC simulations with XRF it is possible to derive concentrations. • We demonstrated that this is possible without removing the patina.

  5. Key Role of the Scavenger Receptor MARCO in Mediating Adenovirus Infection and Subsequent Innate Responses of Macrophages

    Directory of Open Access Journals (Sweden)

    Mareike D. Maler

    2017-08-01

    Full Text Available The scavenger receptor MARCO is expressed in several subsets of naive tissue-resident macrophages and has been shown to participate in the recognition of various bacterial pathogens. However, the role of MARCO in antiviral defense is largely unexplored. Here, we investigated whether MARCO might be involved in the innate sensing of infection with adenovirus and recombinant adenoviral vectors by macrophages, which elicit vigorous immune responses in vivo. Using cells derived from mice, we show that adenovirus infection is significantly more efficient in MARCO-positive alveolar macrophages (AMs and in AM-like primary macrophage lines (Max Planck Institute cells than in MARCO-negative bone marrow-derived macrophages. Using antibodies blocking ligand binding to MARCO, as well as gene-deficient and MARCO-transfected cells, we show that MARCO mediates the rapid adenovirus transduction of macrophages. By enhancing adenovirus infection, MARCO contributes to efficient innate virus recognition through the cytoplasmic DNA sensor cGAS. This leads to strong proinflammatory responses, including the production of interleukin-6 (IL-6, alpha/beta interferon, and mature IL-1α. These findings contribute to the understanding of viral pathogenesis in macrophages and may open new possibilities for the development of tools to influence the outcome of infection with adenovirus or adenovirus vectors.

  6. Stratospheric Ozone destruction by the Bronze-Age Minoan eruption (Santorini Volcano, Greece).

    Science.gov (United States)

    Cadoux, Anita; Scaillet, Bruno; Bekki, Slimane; Oppenheimer, Clive; Druitt, Timothy H

    2015-07-24

    The role of volcanogenic halogen-bearing (i.e. chlorine and bromine) compounds in stratospheric ozone chemistry and climate forcing is poorly constrained. While the 1991 eruption of Pinatubo resulted in stratospheric ozone loss, it was due to heterogeneous chemistry on volcanic sulfate aerosols involving chlorine of anthropogenic rather than volcanogenic origin, since co-erupted chlorine was scavenged within the plume. Therefore, it is not known what effect volcanism had on ozone in pre-industrial times, nor what will be its role on future atmospheres with reduced anthropogenic halogens present. By combining petrologic constraints on eruption volatile yields with a global atmospheric chemistry-transport model, we show here that the Bronze-Age 'Minoan' eruption of Santorini Volcano released far more halogens than sulfur and that, even if only 2% of these halogens reached the stratosphere, it would have resulted in strong global ozone depletion. The model predicts reductions in ozone columns of 20 to >90% at Northern high latitudes and an ozone recovery taking up to a decade. Our findings emphasise the significance of volcanic halogens for stratosphere chemistry and suggest that modelling of past and future volcanic impacts on Earth's ozone, climate and ecosystems should systematically consider volcanic halogen emissions in addition to sulfur emissions.

  7. Holes in teeth - Dental caries in Neolithic and Early Bronze Age populations in Central Germany.

    Science.gov (United States)

    Nicklisch, Nicole; Ganslmeier, Robert; Siebert, Angelina; Friederich, Susanne; Meller, Harald; Alt, Kurt W

    2016-01-01

    This study provides diachronic insight into the epidemiology of carious defects in teeth of Neolithic and Early Bronze Age populations in Central Germany over a period of 4000 years. The data were retrieved from skeletal remains uncovered at 21 sites throughout the Middle Elbe-Saale region (MES), comprising a total of 494 individuals with preserved teeth. The data generated were examined for age- and sex-related differences in order to gain information about the dietary habits and socio-economic structures of the period with the goal of identifying potential diachronic changes. The results indicated that dietary habits changed over the course of the Neolithic period: the prevalence of caries significantly decreased between the Early and Late Neolithic. The adults from the Early Neolithic sample, particularly those from the LBK bore the highest rate of caries. This highlights the essential importance of cereals in the diet of the early farmers in the Middle Elbe-Saale region. As time went on, meat and dairy products became more and more important, which had a positive impact on dental health. The data also show sex-specific differences: women were more often affected by caries than men and female jaws also generally exhibited greater numbers of carious teeth than their male counterparts. Dental health is a reflection of both biological factors and of economic and sociocultural structures. Copyright © 2015 Elsevier GmbH. All rights reserved.

  8. Questions about graphite pottery of Late Bronze and Iron Age I in the Iberian Peninsula

    Directory of Open Access Journals (Sweden)

    Barroso Bermejo, Rosa

    2002-06-01

    Full Text Available Graphite pottery is an increasingly frequent element in the contexts of the Iberian Bronze-Iron Ages. This paper summarises its current dispersal, centred on the eastern Iberian Peninsula, especially in the interior, so that it becomes a good indicator of the relationships established on the Meseta during this period. Most graphite pots are pieces of medium and small size, of good quality, dark colour, non-exclusive shapes and a decoration that allows us to distinguish six different variants. Only the technical aspects link them with the French examples, which have a similar chronology.

    Las cerámicas grafitadas son un elemento cada vez más frecuente en los contextos del Bronce-Hierro peninsular. En este artículo se recoge su dispersión actual, centrada en la vertiente oriental y de gran profusión en las tierras del interior hasta el punto de convertirse en un buen indicador de las relaciones mantenidas por la Meseta durante este periodo. Mayoritariamente estamos ante piezas de mediano y pequeño tamaño, de buena calidad, color oscuro, perfiles no exclusivos y una decoración que permite diferenciar seis variantes diferentes. Sólo la importancia técnica que suponen sigue ligándolas a las francesas con las que tienen entre otras cosas una cronología similar.

  9. Leather material found on a 6th B.C. Chinese bronze sword: A technical study

    Science.gov (United States)

    Luo, Wugan; Si, Yi; Wang, Hongmin; Qin, Ying; Huang, Fengchun; Wang, Changsui

    2011-09-01

    During July to November, 2006, an important archaeological excavation was conducted in Yun country, Hubei province, southern China. Chinese archaeologists found some remnant of leather materials, covered with red pigments, on a 6th century B.C. Chinese bronze sword. To understand the technology/ies that may have been utilized for manufacturing the leathers, a combined of Raman spectroscopy, FT-IR and XRF was thus applied to the remnant of leather materials. Raman analyses showed that red pigment on the leather was cinnabar (HgS). FT-IR and XRF analyses indicated that the content of some elements, such as Ca (existing as CaCO 3) and Fe (existing as Fe 2O 3), were much higher than those in the surrounding grave soil. The results inferred an application of lime depilation and retting, and the Fe-Al compound salt as tanning agent. And it was furthermore implicated that the Fe-Al salt tanning technique had been developed in the middle and late Spring and Autumn Period of China.

  10. Genetic evidence for an origin of the Armenians from Bronze Age mixing of multiple populations.

    Science.gov (United States)

    Haber, Marc; Mezzavilla, Massimo; Xue, Yali; Comas, David; Gasparini, Paolo; Zalloua, Pierre; Tyler-Smith, Chris

    2016-06-01

    The Armenians are a culturally isolated population who historically inhabited a region in the Near East bounded by the Mediterranean and Black seas and the Caucasus, but remain under-represented in genetic studies and have a complex history including a major geographic displacement during World War I. Here, we analyse genome-wide variation in 173 Armenians and compare them with 78 other worldwide populations. We find that Armenians form a distinctive cluster linking the Near East, Europe, and the Caucasus. We show that Armenian diversity can be explained by several mixtures of Eurasian populations that occurred between ~3000 and ~2000 bce, a period characterized by major population migrations after the domestication of the horse, appearance of chariots, and the rise of advanced civilizations in the Near East. However, genetic signals of population mixture cease after ~1200 bce when Bronze Age civilizations in the Eastern Mediterranean world suddenly and violently collapsed. Armenians have since remained isolated and genetic structure within the population developed ~500 years ago when Armenia was divided between the Ottomans and the Safavid Empire in Iran. Finally, we show that Armenians have higher genetic affinity to Neolithic Europeans than other present-day Near Easterners, and that 29% of Armenian ancestry may originate from an ancestral population that is best represented by Neolithic Europeans.

  11. Microstructure, microhardness and dry friction behavior of cold-sprayed tin bronze coatings

    Science.gov (United States)

    Guo, Xueping; Zhang, Ga; Li, Wen-Ya; Dembinski, Lucas; Gao, Yang; Liao, Hanlin; Coddet, Christian

    2007-12-01

    In this paper, two types of tin bronze coatings (Cu-6 wt.% Sn and Cu-8 wt.% Sn) were prepared by cold spray process. The as-sprayed coatings were subjected to a vacuum heat treatment at 600 °C for 3 h. The coating microstructure, microhardness and tribological performance were characterized. The effects of the tin content and the vacuum heat treatment on the microstructure, microhardness and tribological behavior of the coatings were investigated. It is found that the as-sprayed CuSn6 (As6) and CuSn8 (As8) coatings exhibit practically an identical porosity. Meanwhile, As8 presents a higher microhardness than As6. In addition, the increase of the tin content in the powder feedstock leads to a lower wear rate. After a heat treatment, coating porosities are significantly reduced. However, the coating hardness is significantly decreased and the coating presents a much decreased wear resistance. For the as-sprayed coatings, such factors as ploughing and particle delamination could determine the sliding process. The heat treatment results in a distinct modification of the tribological behavior. For the annealed coatings, the adhesion, between the coating and the counterpart, could play a dominant role in the sliding process.

  12. Stratospheric Ozone destruction by the Bronze-Age Minoan eruption (Santorini Volcano, Greece)

    Science.gov (United States)

    Cadoux, Anita; Scaillet, Bruno; Bekki, Slimane; Oppenheimer, Clive; Druitt, Timothy H.

    2015-01-01

    The role of volcanogenic halogen-bearing (i.e. chlorine and bromine) compounds in stratospheric ozone chemistry and climate forcing is poorly constrained. While the 1991 eruption of Pinatubo resulted in stratospheric ozone loss, it was due to heterogeneous chemistry on volcanic sulfate aerosols involving chlorine of anthropogenic rather than volcanogenic origin, since co-erupted chlorine was scavenged within the plume. Therefore, it is not known what effect volcanism had on ozone in pre-industrial times, nor what will be its role on future atmospheres with reduced anthropogenic halogens present. By combining petrologic constraints on eruption volatile yields with a global atmospheric chemistry-transport model, we show here that the Bronze-Age ‘Minoan’ eruption of Santorini Volcano released far more halogens than sulfur and that, even if only 2% of these halogens reached the stratosphere, it would have resulted in strong global ozone depletion. The model predicts reductions in ozone columns of 20 to >90% at Northern high latitudes and an ozone recovery taking up to a decade. Our findings emphasise the significance of volcanic halogens for stratosphere chemistry and suggest that modelling of past and future volcanic impacts on Earth’s ozone, climate and ecosystems should systematically consider volcanic halogen emissions in addition to sulfur emissions. PMID:26206616

  13. A family of rare earth molybdenum bronzes: Oxides consisting of periodic arrays of interacting magnetic units

    Science.gov (United States)

    Schneemeyer, L. F.; Siegrist, T.; Besara, T.; Lundberg, M.; Sun, J.; Singh, D. J.

    2015-07-01

    The family of rare earth molybdenum bronzes, reduced ternary molybdates of composition LnMo16O44, was synthesized and a detailed structural study carried out. Bond valence sum (BVS) calculations clearly show that the molybdenum ions in tetrahedral coordination are hexavalent while the electron count in the primitive unit cell is odd. Yet, measurements show that the phases are semiconductors. The temperature dependence of the magnetic susceptibility of samples containing several different rare earth elements was measured. These measurements verified the presence of a 6.5 K magnetic phase transition not arising from the rare earth constituent, but likely associated with the unique isolated ReO3-type Mo8O36 structural subunits in this phase. To better understand the behavior of these materials, electronic structure calculations were performed within density functional theory. Results suggest a magnetic state in which these structural moieties have an internal ferromagnetic arrangement, with small ~1/8 μB moments on each Mo. We suggest that the Mo8O36 units behave like pseudoatoms with spin 1/2 derived from a single hole distributed over the eight Mo atoms that are strongly hybridized with the O atoms of the subunit. Interestingly, while the compound is antiferromagnetic, our calculations suggest that a field-stabilized ferromagnetic state, if achievable, will be a narrow band half-metal.

  14. Crystal structure determination of a new sodium vanadium bronze electrochemically formed

    Science.gov (United States)

    Safrany Renard, Marianne; Emery, Nicolas; Roginskii, Evgenii M.; Baddour-Hadjean, Rita; Pereira-Ramos, Jean-Pierre

    2017-10-01

    γ-Na0.97V2O5 is synthesized by electrochemical reduction at constant current of γ'-V2O5 in a 1 M NaClO4 propylene carbonate electrolyte. This sodium vanadium pentoxide bronze has not heretofore been prepared. The structure of this new sodium insertion compound was solved by Rietveld refinement of the X-ray diffraction data and Raman spectroscopy. It exhibits an orthorhombic layered structure type (Pnma space group) with Na ions located in the large octahedral sites of the interlayer space. The structural features of γ-Na0.97V2O5 at the long range and atomic scale are provided and compared to those of γ'-V2O5 and the lithiated analogue γ-LiV2O5. Reliable 'structure-Raman spectrum' correlations are proposed and Raman peaks characteristics of the different structural units are identified. Preliminary electrochemical experiments show a strong interest of γ-Na0.97V2O5 as rechargeable high voltage cathode for Na batteries (specific capacity of 80-125 mAh g-1 at c. a. 3.3 V vs Na+/Na).

  15. EDXRF and micro-EDXRF studies of Late Bronze Age metallurgical productions from Canedotes (Portugal)

    Science.gov (United States)

    Valerio, Pedro; Araújo, M. de Fátima; Canha, Alexandre

    2007-10-01

    Metallurgical production in Central Portugal during the Late Bronze Age was primarily based on copper-tin alloys, despite influences from the Atlantic area where copper-tin-lead alloys are common. Metallic artefacts from archaeological site of Canedotes (Central Portugal) were analysed by EDXRF to establish the type of alloys present. Polished spots in selected artefacts were also analysed by micro-EDXRF to determine the major and minor elemental composition of the original alloys. The collection constitutes 18 copper-tin artefacts and one unalloyed copper artefact with tin and arsenic as minor constituents. Artefacts that require a thermomechanical finishing process, such as tools and weapons, seem to have improved control over the tin content. The composition of two buttons, one cramp and one metallic droplet suggest that some of the copper sources were rich in arsenic. Finally, the low iron content of the artefacts seems to agree well with the smelting of copper ores in crucible furnaces, a smelting process used in certain areas of the Iberian Peninsula until pre-Roman times.

  16. EDXRF and micro-EDXRF studies of Late Bronze Age metallurgical productions from Canedotes (Portugal)

    Energy Technology Data Exchange (ETDEWEB)

    Valerio, Pedro [Instituto Technologico e Nuclear, Chemistry, Estrada Nacional 10, 2686-953 Sacavem, Lisbon (Portugal)], E-mail: pvalerio@itn.pt; Araujo, M. de Fatima [Instituto Technologico e Nuclear, Chemistry, Estrada Nacional 10, 2686-953 Sacavem, Lisbon (Portugal); Canha, Alexandre [Centro de Estudos Pre-historicos da Beira Alta, Largo Antonio Jose Pereira, 3501-997 Viseu (Portugal)

    2007-10-15

    Metallurgical production in Central Portugal during the Late Bronze Age was primarily based on copper-tin alloys, despite influences from the Atlantic area where copper-tin-lead alloys are common. Metallic artefacts from archaeological site of Canedotes (Central Portugal) were analysed by EDXRF to establish the type of alloys present. Polished spots in selected artefacts were also analysed by micro-EDXRF to determine the major and minor elemental composition of the original alloys. The collection constitutes 18 copper-tin artefacts and one unalloyed copper artefact with tin and arsenic as minor constituents. Artefacts that require a thermomechanical finishing process, such as tools and weapons, seem to have improved control over the tin content. The composition of two buttons, one cramp and one metallic droplet suggest that some of the copper sources were rich in arsenic. Finally, the low iron content of the artefacts seems to agree well with the smelting of copper ores in crucible furnaces, a smelting process used in certain areas of the Iberian Peninsula until pre-Roman times.

  17. A Male Aggregation Pheromone in the Bronze Bug, Thaumastocoris peregrinus (Thaumastocoridae

    Directory of Open Access Journals (Sweden)

    Andrés González

    2012-01-01

    Full Text Available Forest plantations in Uruguay have doubled in the past decade, with Eucalyptus spp. leading this growth. The bronze bug, Thaumastocoris peregrinus (Heteroptera: Thaumastocoridae, originally restricted to Australia, is an important emerging pest of Eucalyptus plantations in the Southern hemisphere. T. peregrinus feeds on mature Eucalyptus leaves, causing them to turn brown and often fall from the tree. Although population dynamics and behavioural patterns are not clearly understood, circumstantial observations suggest that males and nymphs aggregate. We used gas chromatography coupled to mass spectrometry to analyze volatile organic compounds emitted by virgin males and females, and characterized a male-specific compound, 3-methylbut-2-enyl butanoate, based on mass spectral data and chromatographic comparison with a synthetic standard. We also performed Y-olfactometer bioassays to test the attraction of virgin males and females toward live virgin males, male volatile extracts, and synthetic 3-methylbut-2-enyl butanoate. Males were attracted toward conspecific males, while virgin females showed no preference, suggesting that male volatiles are not involved in sexual communication. Further olfactometer tests showed that males were attracted to male volatile extracts and to synthetic 3-methylbut-2-enyl butanoate. The ecological significance of this compound and its potential use for the management of T. peregrinus in Eucalyptus forests will be further investigated.

  18. The ``Madonna di Loreto'' Bronze Age Sanctuary and its Stone Calendar

    Science.gov (United States)

    Tunzi, A.; Zupone, M. L.; Antonello, E.

    2009-08-01

    The ``Madonna di Loreto'' (Trinitapoli, Puglia) site is the largest Bronze Age sanctuary presently known in Italy. Inside its area, several hypogeal structures excavated in the calcareous rock and devoted to ritual use were found. The most impressive manifestation of the cult is however a set of more than 1000 circular holes, aligned in rows and covering the whole sacred area. The holes were excavated during many centuries, following a rigid plan and taking into account specific celestial points. The archaeoastronomical study of the rows revealed three main alignments: that with the highest frequency, i.e. with the highest number of holes, is along the meridian, thus referring to astronomical phenomena with a daily periodicity; that with an intermediate frequency to a phenomenon with annual periodicity (the azimuth of the sunrise on a peculiar day, near to the summer solstice), and that with the lowest frequency to the South major lunistice, a phenomenon with a long term (18.6 years) periodicity. This agreement has a very high statistical significance and it allows us to interpret the hole rows as elements of a complex calendric system with a ritual character.

  19. Fabricating Superior NiAl Bronze Components through Wire Arc Additive Manufacturing

    Directory of Open Access Journals (Sweden)

    Donghong Ding

    2016-08-01

    Full Text Available Cast nickel aluminum bronze (NAB alloy is widely used for large engineering components in marine applications due to its excellent mechanical properties and corrosion resistance. Casting porosity, as well as coarse microstructure, however, are accompanied by a decrease in mechanical properties of cast NAB components. Although heat treatment, friction stir processing, and fusion welding were implemented to eliminate porosity, improve mechanical properties, and refine the microstructure of as-cast metal, their applications are limited to either surface modification or component repair. Instead of traditional casting techniques, this study focuses on developing NAB components using recently expanded wire arc additive manufacturing (WAAM. Consumable welding wire is melted and deposited layer-by-layer on substrates producing near-net shaped NAB components. Additively-manufactured NAB components without post-processing are fully dense, and exhibit fine microstructure, as well as comparable mechanical properties, to as-cast NAB alloy. The effects of heat input from the welding process and post-weld-heat-treatment (PWHT are shown to give uniform NAB alloys with superior mechanical properties revealing potential marine applications of the WAAM technique in NAB production.

  20. Computed tomography of a medium size Roman bronze statue of Cupid

    Energy Technology Data Exchange (ETDEWEB)

    Bettuzzi, M.; Brancaccio, R. [University of Bologna, Department of Physics and Astronomy, Bologna (Italy); Casali, F.; Morigi, M.P. [University of Bologna, Department of Physics and Astronomy, Bologna (Italy); Centro Fermi, Rome (Italy); Carson, D.; Chiari, G. [Getty Conservation Institute, Los Angeles, CA (United States); Maish, J. [The J. Paul Getty Museum, Los Angeles, CA (United States)

    2015-01-14

    Diagnostics based on X-ray computed tomography (CT) are becoming increasingly important, not only in the medical field but in industry and cultural heritage. CT devices typical for medical applications, however, can seldom be used on art objects because both they are not easily transportable and they often present high X-ray absorption. It is therefore necessary to make use of portable instrumentation and/or to develop tomographic systems optimized to the characteristics of the objects under examination. This work describes the computed tomography of a first century A.D. Roman bronze statue of Cupid (96.AB.53) in the collection of the J. Paul Getty Museum, within the collaborative framework between the Getty Conservation Institute and the Department of Physics and Astronomy (DIFA) of the University of Bologna (Italy). The tomography performed at the Getty facilities employed a 450 kV X-ray tube and a detection system developed at DIFA. The study highlighted the casting and construction techniques used by Roman foundry workers and provided information on the status of conservation of the statue. A 3D virtual reconstruction allowed the user to define different cross-sections enabling the study of the internal features. (orig.)

  1. Genetic variants in MARCO are associated with the susceptibility to pulmonary tuberculosis in Chinese Han population.

    Directory of Open Access Journals (Sweden)

    Mai-Juan Ma

    Full Text Available BACKGROUND: Susceptibility to tuberculosis is not only determined by Mycobacterium tuberculosis infection, but also by the genetic component of the host. Macrophage receptor with a collagenous structure (MARCO is essential components required for toll like receptor-signaling in macrophage response to Mycobacterium tuberculosis, which may contribute to tuberculosis risk. PRINCIPAL FINDINGS: To specifically investigated whether single nucleotide polymorphisms (SNPs in MARCO gene are associated with pulmonary tuberculosis in Chinese Han population. By selecting tagging SNPs in MARCO gene, 17 tag SNPs were identified and genotyped in 923 pulmonary tuberculosis patients and 1033 healthy control subjects using a hospital based case-control association study. Single-point and haplotype analysis revealed an association in intron and exon region of MARCO gene. One SNP (rs17009726 was associated with susceptibility to pulmonary tuberculosis, where the carriers of the G allele had a 1.65 fold (95% CI = 1.32-2.05, p(corrected = 9.27E-5 increased risk of pulmonary tuberculosis. Haplotype analysis revealed that haplotype GC containing G allele of 17009726 and haplotype TGCC (rs17795618T/A, rs1371562G/T, rs6761637T/C, rs2011839C/T were also associated with susceptibility to pulmonary tuberculosis (p(corrected = 0.0001 and 0.029, respectively. CONCLUSIONS: Our study suggested that genetic variants in MARCO gene were associated with pulmonary tuberculosis susceptibility in Chinese Han population, and the findings emphasize the importance of MARCO mediated immune responses in the pathogenesis of tuberculosis.

  2. Hacia un Marco Conceptual Común sobre Trazabilidad en la Cadena de Suministro de Alimentos

    OpenAIRE

    Dora Lucia Rincón Ballesteros; Johan Esteban Fonseca Ramírez; Javier Arturo Orjuela-Castro

    2017-01-01

    Contexto: La ausencia de un marco conceptual común sobre trazabilidad en la cadena de suministro de alimentos (CSA), impide su desarrollo de manera unificada. Dicha ausencia ha generado confusión y no ha permitido evidenciar las ventajas sociales y empresariales de implementarla; además, no contar con un marco común en países como Colombia, impide el desarrollo adecuado de políticas públicas. Método: Se realizó una revisión sistemática de la literatura en cuatro etapas: protocolo de búsq...

  3. [A SAS marco program for batch processing of univariate Cox regression analysis for great database].

    Science.gov (United States)

    Yang, Rendong; Xiong, Jie; Peng, Yangqin; Peng, Xiaoning; Zeng, Xiaomin

    2015-02-01

    To realize batch processing of univariate Cox regression analysis for great database by SAS marco program. We wrote a SAS macro program, which can filter, integrate, and export P values to Excel by SAS9.2. The program was used for screening survival correlated RNA molecules of ovarian cancer. A SAS marco program could finish the batch processing of univariate Cox regression analysis, the selection and export of the results. The SAS macro program has potential applications in reducing the workload of statistical analysis and providing a basis for batch processing of univariate Cox regression analysis.

  4. Análisis de la eficacia en la ejecución de la función transferida 49 I : prevención y control de riesgos y daños de emergencias y desastres; en el marco de la política de gestión del riesgo de desastres, en las direcciones de salud de Lima durante el año 2012

    OpenAIRE

    Gonzáles Calienes, Katherine Nidia

    2015-01-01

    El Perú es un país multiamenaza, en el cual los peligros de origen natural como las bajas temperaturas, lluvias, inundaciones, Fenómeno El Niño, deslizamientos entre los principales causan eventos recurrentes y en algunos casos intensivos que afectan a la población y sus medios de vida. “La Gestión del Riesgo de Desastres es un proceso social”1, que tiene como finalidad disminuir los riesgos y daños producto de los desastres y cuya implementación requiere su transversalizaci...

  5. Release of copper from sintered tungsten-bronze shot under different pH conditions and its potential toxicity to aquatic organisms.

    Science.gov (United States)

    Thomas, Vernon G; Santore, Robert C; McGill, Ian

    2007-03-01

    Sintered tungsten-bronze is a new substitute for lead shot, and is about to be deposited in and around the wetlands of North America. This material contains copper in the alloyed form of bronze. This in vitro study was performed according to U.S. Fish and Wildlife Service criteria to determine the dissolution rate of copper from the shot, and to assess the toxic risk that it may present to aquatic organisms. The dissolution of copper from tungsten-bronze shot, pure copper shot, and glass beads was measured in a buffered, moderately hard, synthetic water of pH 5.5, 6.6, and 7.8 over a 28-day period. The dissolution of copper from both the control copper shot and the tungsten-bronze shot was affected significantly by the pH of the water and the duration of dissolution (all p valuescopper release from tungsten bronze shot was 30 to 50 times lower than that from the copper shot, depending on pH (pcopper released from tungsten-bronze shot after 28 days was 0.02 microg/L at pH 7.8, and 0.4 microg/L at pH 5.6, using a loading and exposure scenario specific in a U.S. Fish and Wildlife Service protocol. Ratio Quotient values derived from the highest EEC observed in this study (0.4 microg/L), and the copper toxic effect levels for all aquatic species listed in the U.S. Environmental Protection Agency ambient water quality criteria database, were all far less than the 0.1 criterion value. Given the conditions stipulated by the U.S. Fish and Wildlife Service and the U.S. Environmental Protection Agency, heavy loading from discharged tungsten-bronze shot would not pose a toxic risk to potable water, or to soil. Consequently, it would appear that no toxic risks to aquatic organisms will attend the use of tungsten-bronze shot of the approved composition. Given the likelihood that sintered tungsten-bronze of the same formula will be used for fishing weights, bullets, and wheel balance weights, it is expected that the use of this new material in these applications will not be

  6. Simboluri sociale în epoca bronzului. Sceptre de corn şi os / Social symbols in the Bronze Age. Antler and bone scepters

    Directory of Open Access Journals (Sweden)

    Vasile Diaconu

    2014-10-01

    Full Text Available The present study discusses the antler and bone scepters specific for the Romanian Bronze Age. This type of objects have been found since the Neolithic period, they are frequently encountered during the Bronze Age and rarely discovered in the first period of the Iron Age. The majority of the pieces are made of antler and only a couple of them are made of bone. Some of the pieces, beautifully decorated have a central perforation in order to fix it in a wooden handle. Concerning the archaeological context of the findings, the majority of the objects were discovered inside the settlements and only one piece is part of the inventory of a tomb. The antler and bone scepters have been discovered in different archaeological cultures since the Early Bronze Age, but the majority of the pieces are attributed to the Middle Bronze Age (the Monteoru, Wietenberg, Costişa, Otomani, Verbicioara cultures. For the Late Bronze Age we only know one item. The signification of such items is primarily related to the social symbolism, but they can also be interpreted as cult objects in the case of their utilization during religious rituals.

  7. Muid võimalusi ei ole! / Kristina Norman, Marco Laimre ; intervjueerinud Elena Šmakova

    Index Scriptorium Estoniae

    Norman, Kristina, 1979-

    2009-01-01

    53. Veneetsia biennaalil "Making Worlds" ("Konstrueerides maailmu") Eestit esindavast Kristina Normani Tõnismäe pronkssõduri monumenti käsitlevast kunstiprojektist "After-War" ("Järelsõda"). Projekti kuraator Marco Laimre. Eesti ekspositsioon on avatud Palazzo Malipieros 6. juunist 22. novembrini. Biennaali nõukogu otsustas anda suured Kuldsed Lõvid elutöö eest Yoko Onole ja John Baldessarile

  8. Orbital stability during the mapping and approach phases of the MarcoPolo-R spacecraft

    Science.gov (United States)

    Wickhusen, K.; Hussmann, H.; Oberst, J.; Luedicke, F.

    2012-09-01

    In support of the Marco-Polo-R mission we are analyzing the motion of the spacecraft in the vicinity of its primary target, the binary asteroid system 175706 (1996 FG3). We ran simulations in order to support the general mapping, the approach, and the sampling phase

  9. Project Marco Polo: Bridging the Gap between Natural and Social Sciences.

    Science.gov (United States)

    Bein, Frederick L.; Rea, Patrick

    1992-01-01

    Describes Project Marco Polo in which students, teachers, and staff from "National Geographic" and the U.S. Navy traveled to Japan. Reports that they studied Japanese culture, oceanography, and natural science while on the trip. Includes excerpts from field journals kept by the participants, photographs of the trip, and a map. (DK)

  10. Stability and Evolution of Orbits around Binary Asteroids: Applications to the Marco Polo Mission Scenario

    Science.gov (United States)

    Wickhusen, K.; Oberst, J.; Hussmann, H.; Shi, X.; Damme, F.

    2011-10-01

    We have analyzed the orbit stability of a spacecraft moving around a small Near-Earth-Asteroid (NEA), focusing on the primary target of the Marco Polo Mission: 175706 (1996 FG3). The simulation showed that most orbits are unstable over time but under certain conditions the S/C stays in orbit without crashing or escaping into space.

  11. Monitoring and Assessment of Regional Air Quality in China Using Space Observations (MarcoPolo)

    Science.gov (United States)

    van der A, Ronald; Ding, Jieying; Mijling, Bas; Bai, Jianhui

    2014-11-01

    In this paper we will present the FP7-project ’MarcoPolo’. The main objective of Marco Polo is to improve air quality monitoring, modelling and forecasting over China using satellite data. Within the preceeding DRAGON project AMFIC it was concluded that modelling of air quality are hampered by the rapidly changing emission data due to economic growth in China. In addition, air quality policies could not directly be related to changes in emissions. Therefore, within the MarcoPolo project, the focus will be placed on emission estimates from space and the refinement of these emission estimates by spatial downscaling and by source sector apportionment. A wide range of satellite data will be used from various satellite instruments to derive emission estimates for NOx, SO2, PM and biogenic sources. By combining these emission data with known information from the ground, a new emission database for MarcoPolo will be constructed. The improved emission inventory will be input to the regional and local air quality models.

  12. Las interpelaciones de la transmodernidad y la cuestión del marco categorial

    Directory of Open Access Journals (Sweden)

    Yamandú Acosta

    2013-11-01

    Full Text Available Se considera a las ciencias sociales y las humanidades desde una perspectiva crítica latinoamericanaa propósito de la integración, focalizando la cuestión del marco categorial desde las interpelaciones de latransmodernidad.

  13. Perspectiva crítica del valor razonable en el marco de la crisis financiera

    National Research Council Canada - National Science Library

    Sandra Patricia Perea-Murillo

    2015-01-01

      El presente documento hace parte de las reflexiones conceptuales sobre la emisión del estándar de valor razonable por organismos reguladores como el FASB y el IASB, en el marco de la crisis financiera de 2008...

  14. El plagio en el marco de los delitos contra la propiedad intelectual

    OpenAIRE

    Iglesias Río, Miguel Angel

    2016-01-01

    Estudio realizado en el marco del Proyecto de investigación DER2013-43967-R, sobre “Propiedad intelectual en las Universidades públicas: Titularidad, gestión y transferencia”, financiado por el Ministerio de Economía y Competitividad (MINECO)

  15. Il Doge and Easter Processions at San Marco in Early Modern Venice

    DEFF Research Database (Denmark)

    Petersen, Nils Holger

    2010-01-01

    –1800. Traditional representational features – from the early Middle Ages – e.g. of the women at Christ’s grave had been incorporated into these ducal processions during the sixteenth century with special roles for the doge. The complex of solemn processions from the ducal palace around the San Marco piazza...

  16. Competencias básicas en Infantil, Primaria y Secundaria. Marco teórico.

    OpenAIRE

    Viana Orta, María Isabel

    2007-01-01

    Marco teórico del nuevo modelo educativo tras la aprobación de la LOE, basado en la adquisición y desarrollo de comptencias básicas. El material forma parte de cursos de formación permanente del profesorado.

  17. Macrophage Receptor with Collagenous Structure (MARCO Is Processed by either Macropinocytosis or Endocytosis-Autophagy Pathway.

    Directory of Open Access Journals (Sweden)

    Seishiro Hirano

    Full Text Available The Macrophage Receptor with COllagenous structure (MARCO protein is a plasma membrane receptor for un-opsonized or environmental particles on phagocytic cells. Here, we show that MARCO was internalized either by ruffling of plasma membrane followed by macropinocytosis or by endocytosis followed by fusion with autophagosome in CHO-K1 cells stably transfected with GFP-MARCO. The macropinocytic process generated large vesicles when the plasma membrane subsided. The endocytosis/autophagosome (amphisome generated small fluorescent puncta which were visible in the presence of glutamine, chloroquine, bafilomycin, ammonia, and other amines. The small puncta, but not the large vesicles, co-localized with LC3B and lysosomes. The LC3-II/LC3-I ratio increased in the presence of glutamine, ammonia, and chloroquine in various cells. The small puncta trafficked between the peri-nuclear region and the distal ends of cells back and forth at rates of up to 2-3 μm/sec; tubulin, but not actin, regulated the trafficking of the small puncta. Besides phagocytosis MARCO, an adhesive plasma membrane receptor, may play a role in incorporation of various extracellular materials into the cell via both macropinocytic and endocytic pathways.

  18. Marco de referencia para Enfermería Pediátrica

    OpenAIRE

    Álvarez Miró, Roser; Pérez Robles, Francisca

    1991-01-01

    Presentamos a continuación un artículo que describe de manera clara y concreta un marco de referencia para el desarrollo de la Enfermería Pediátrica, definiendo conceptos, clarificando objetivos, todo ello de cara a comprender a los niños y adolescentes como individuos que interactúan con otros seres humanos.

  19. Bronze Jewellery from the Early Iron Age urn-field in Mała Kępa. An approach to casting technology

    Directory of Open Access Journals (Sweden)

    Garbacz-Klempka A.

    2017-09-01

    Full Text Available This study characterizes the bronze jewellery recovered from the Lusatian culture urn-field in Mała Kępa (Chełmno land, Poland. Among many common ornaments (e.g. necklaces, rings, pins the ones giving evidence of a steppe-styled inspiration (nail earrings were also identified. With the dendritic microstructures revealed, the nail earrings prove the implementing of a lost-wax casting method, whereas some of the castings were further subjected to metalworking. The elemental composition indicates the application of two main types of bronze alloys: Cu-Sn and Cu-Sn-Pb. It has been established that the Lusatian metalworkers were familiar with re-melting the scrap bronze and made themselves capable of roasting the sulphide-rich ores.

  20. Agricultural production and stability of settlement systems in Upper Mesopotamia during the Early Bronze Age (third millennium BCE)

    Science.gov (United States)

    Kalayci, Tuna

    This study investigates the relationship between rainfall variation and rain-fed agricultural production in Upper Mesopotamia with a specific focus on Early Bronze Age urban settlements. In return, the variation in production is used to explore stability of urban settlement systems. The organization of the flow of agricultural goods is the key to sustaining the total settlement system. The vulnerability of a settlement system increases due to the increased demand for more output from agricultural lands. This demand is the key for the success of urbanization project. However, without estimating how many foodstuffs were available at the end of a production cycle, further discussions on the forces that shaped and sustained urban settlement systems will be lacking. While large scale fluctuations in the flow of agricultural products between settlements are not the only determinants of hierarchical structures, the total available agricultural yield for each urban settlement in a hierarchy must have influenced settlement relations. As for the methodology, first, Early Bronze Age precipitation levels are estimated by using modern day associations between the eastern Mediterranean coastal areas and the inner regions of Upper Mesopotamia. Next, these levels are integrated into a remote-sensing based biological growth model. Also, a CORONA satellite imagery based archaeological survey is conducted in order to map the Early Bronze Age settlement system in its entirety as well as the ancient markers of agricultural intensification. Finally, ancient agricultural production landscapes are modeled in a GIS. The study takes a critical position towards the traditionally held assumption that large urban settlements (cities) in Upper Mesopotamia were in a state of constant demand for food. The results from this study also suggest that when variations in ancient precipitation levels are translated into the variations in production levels, the impact of climatic aridification on ancient

  1. Chronological aspects of the funerary deposit and Bronze Age fortified settlement of Chao Samartín

    Directory of Open Access Journals (Sweden)

    Villa Valdés, Ángel

    2003-12-01

    Full Text Available The Chao Samartín hillfort, in western Asturias, was initially fortified at the end of the Bronze Age. A large building enclosed within several defensive lines was present at the settlement around the 8th century B.C., its excavation yielding important bronze artefacts. A small stone urn containing a human female cranium has been recently uncovered by the main gate of this fortress. The aim of this contribution is to present a set of new radiocarbon dates that allow us to ascertain the placement of this burial within the chrono-archaeological context of the Final Bronze Age settlement.

    El castro de Chao Samartín, en el occidente de Asturias, remonta su condición de asentamiento fortificado a finales de la Edad del Bronce. Durante el siglo VIII a.C. defensas monumentales delimitaban un recinto en el que se alzaba, en posición principal, una cabaña de grandes dimensiones de la que procede un interesante repertorio de materiales metálicos fabricados en bronce. Junto a la puerta de acceso al recinto, al pie de la fortificación, se instaló una pequeña cista que contenía el cráneo de una mujer joven. Este artículo presenta las nuevas dataciones que permiten establecer la antigüedad del depósito y su contextualización crono-arqueológica con el establecimiento del Bronce Final.

  2. Roman Bronze Vessels From the Late Sarmatian Burial of the Lebedevka Burial-Ground in Western Kazakhstan

    Directory of Open Access Journals (Sweden)

    Treister Mikhail Yuryevich

    2015-12-01

    Full Text Available This paper is devoted to studying cultural monuments – bronze vessels, a jug and a basin from the barrow no. 1/1967 of the Lebedevka Late Sarmatian burial mound (Western Kazakhstan, dating back to the middle of the 3rd century AD at the latest. These items do not find exact parallels among the bronze vessels of provincial Rome. Although the shape of the jug handle with a curved leaf turned upright between two horizontally arranged swan heads has parallels on the so-called “composite jug with handles” (“gegliederten Henkelkrügen”, the cylindrical form of the jug’s neck peculiar of the glass jugs of allegedly Syrian manufacture of the second half of the 3rd-4th centuries AD is very unusual. Even more unusual is a basin with horizontally bent rim and elaborate handles with pearls on a high narrow stand-ring. The XRF analyses of the Lebedevka jug’s metal revealed that its body and handle were made of a copper-based alloy with very high admixtures of zinc (24-27 % and inconsiderable additions of lead (up to 3 %. A similar alloy was used for manufacturing a vessel in the form of a crouching young negro from Niederbieber. Most objects of provincial Roman import reached Western Kazakhstan via the Bosporan kingdom along the Northern branch of the Silk Road. The above discussed bronze vessels from Lebedevka let suggest, that the nomads could receive some import articles that were brought along the caravan routes leading from Egypt and Syria to the East.

  3. Technical and Technological Analysis of the Ceramics of the Late Bronze Archaeological Monument Ozerki-1 in the Bashkir Urals

    Directory of Open Access Journals (Sweden)

    Mukhametdinov Vadim Ildarovich

    2015-12-01

    Full Text Available The relevance of studying small settlements in recent years is associated with the lack of information about the monuments of this type. The data on small settlements can help to find answers to a number of topical issues, such as settlement system, interaction with large settlements. The location of small settlements near water bodies attests to the fact of using them primarily as seasonal shelters. These places also served as pastures for the flock. The article contains the results of technical and technological analysis of ceramics obtained during the study of archaeological site of the late bronze age Ozerki-1. The monument is located on the territory of the Beregovsky archaeological district the Meleuzovsky region of the Republic of Bashkortostan. The analysis of ceramics was carried out within the historical and cultural approach, according to the technique developed by A.A. Bobrinsky. The study let reveal a large number of recipes of moulding materials. This data obtained during the analysis of ceramics in a comparatively small area of excavation, may be associated with the active process of transformations of adaptive pottery traditions that were taking place in the course of cross-cultural contacts. As a result of excavations, the author obtained the new data on the economic activity of the population of the Western slopes of the southern Urals in the Late Bronze Age. The findings let discover the traces of metallurgy, find the bones of domestic animals, reveal the location of small settlements around large settlements. The fact of business chain existence, including farming, industry of stone and steel processing testifies to the possible autonomy of the studied areas. The data can be used in comparative works that reflect the course of historical processes of the Late Bronze Age on the territory of the forest-steppe Urals.

  4. Monumental megalithic burial and rock art tell a new story about the Levant Intermediate Bronze “Dark Ages”

    Science.gov (United States)

    Barash, Alon; Eisenberg-Degen, Davida; Grosman, Leore; Oron, Maya; Berger, Uri

    2017-01-01

    The Intermediate Bronze Age (IB) in the Southern Levant (ca. 2350–2000 BCE) is known as the “Dark Ages,” following the collapse of Early Bronze urban society and predating the establishment of the Middle Bronze cities. The absence of significant settlements and monumental building has led to the reconstruction of IB social organization as that of nomadic, tribal society inhabiting rural villages with no central governmental system. Excavation in the Shamir Dolmen Field (comprising over 400 dolmens) on the western foothills of the Golan Heights was carried out following the discovery of rock art engravings on the ceiling of the central chamber inside one of the largest dolmens ever recorded in the Levant. Excavation of this multi-chambered dolmen, covered by a basalt capstone weighing some 50 tons, revealed a secondary multi-burial (of both adults and children) rarely described in a dolmen context in the Golan. Engraved into the rock ceiling above the multi-burial is a panel of 14 forms composed of a vertical line and downturned arc motif. 3D-scanning by structured-light technology was used to sharpen the forms and revealed the technique employed to create them. Building of the Shamir dolmens required a tremendous amount of labor, architectural mastery, and complex socio-economic organization well beyond the capacity of small, rural nomadic groups. The monumental megalithic burial of the Shamir dolmens indicates a hierarchical, complex, non-urban governmental system. This new evidence supports a growing body of recent criticism stemming from new discoveries and approaches that calls for rethinking our views of the Levantine IB “Dark Ages.” PMID:28253312

  5. Monumental megalithic burial and rock art tell a new story about the Levant Intermediate Bronze "Dark Ages".

    Science.gov (United States)

    Sharon, Gonen; Barash, Alon; Eisenberg-Degen, Davida; Grosman, Leore; Oron, Maya; Berger, Uri

    2017-01-01

    The Intermediate Bronze Age (IB) in the Southern Levant (ca. 2350-2000 BCE) is known as the "Dark Ages," following the collapse of Early Bronze urban society and predating the establishment of the Middle Bronze cities. The absence of significant settlements and monumental building has led to the reconstruction of IB social organization as that of nomadic, tribal society inhabiting rural villages with no central governmental system. Excavation in the Shamir Dolmen Field (comprising over 400 dolmens) on the western foothills of the Golan Heights was carried out following the discovery of rock art engravings on the ceiling of the central chamber inside one of the largest dolmens ever recorded in the Levant. Excavation of this multi-chambered dolmen, covered by a basalt capstone weighing some 50 tons, revealed a secondary multi-burial (of both adults and children) rarely described in a dolmen context in the Golan. Engraved into the rock ceiling above the multi-burial is a panel of 14 forms composed of a vertical line and downturned arc motif. 3D-scanning by structured-light technology was used to sharpen the forms and revealed the technique employed to create them. Building of the Shamir dolmens required a tremendous amount of labor, architectural mastery, and complex socio-economic organization well beyond the capacity of small, rural nomadic groups. The monumental megalithic burial of the Shamir dolmens indicates a hierarchical, complex, non-urban governmental system. This new evidence supports a growing body of recent criticism stemming from new discoveries and approaches that calls for rethinking our views of the Levantine IB "Dark Ages."

  6. Monumental megalithic burial and rock art tell a new story about the Levant Intermediate Bronze "Dark Ages".

    Directory of Open Access Journals (Sweden)

    Gonen Sharon

    Full Text Available The Intermediate Bronze Age (IB in the Southern Levant (ca. 2350-2000 BCE is known as the "Dark Ages," following the collapse of Early Bronze urban society and predating the establishment of the Middle Bronze cities. The absence of significant settlements and monumental building has led to the reconstruction of IB social organization as that of nomadic, tribal society inhabiting rural villages with no central governmental system. Excavation in the Shamir Dolmen Field (comprising over 400 dolmens on the western foothills of the Golan Heights was carried out following the discovery of rock art engravings on the ceiling of the central chamber inside one of the largest dolmens ever recorded in the Levant. Excavation of this multi-chambered dolmen, covered by a basalt capstone weighing some 50 tons, revealed a secondary multi-burial (of both adults and children rarely described in a dolmen context in the Golan. Engraved into the rock ceiling above the multi-burial is a panel of 14 forms composed of a vertical line and downturned arc motif. 3D-scanning by structured-light technology was used to sharpen the forms and revealed the technique employed to create them. Building of the Shamir dolmens required a tremendous amount of labor, architectural mastery, and complex socio-economic organization well beyond the capacity of small, rural nomadic groups. The monumental megalithic burial of the Shamir dolmens indicates a hierarchical, complex, non-urban governmental system. This new evidence supports a growing body of recent criticism stemming from new discoveries and approaches that calls for rethinking our views of the Levantine IB "Dark Ages."

  7. Characterizing a Middle Bronze palatial wine cellar from Tel Kabri, Israel.

    Science.gov (United States)

    Koh, Andrew J; Yasur-Landau, Assaf; Cline, Eric H

    2014-01-01

    Scholars have for generations recognized the importance of wine production, distribution, and consumption in relation to second millennium BC palatial complexes in the Mediterranean and Near East. However, direct archaeological evidence has rarely been offered, despite the prominence of ancient viticulture in administrative clay tablets, visual media, and various forms of documentation. Tartaric and syringic acids, along with evidence for resination, have been identified in ancient ceramics, but until now the archaeological contexts behind these sporadic discoveries had been uneven and vague, precluding definitive conclusions about the nature of ancient viticulture. The situation has now changed. During the 2013 excavation season of the Kabri Archaeological Project, a rare opportunity materialized when forty large storage vessels were found in situ in an enclosed room located to the west of the central courtyard within the Middle Bronze Age Canaanite palace. A comprehensive program of organic residue analysis has now revealed that all of the relatively uniform jars contain evidence for wine. Furthermore, the enclosed context inherent to a singular intact wine cellar presented an unprecedented opportunity for a scientifically intensive study, allowing for the detection of subtle differences in the ingredients or additives within similar wine jars of apparently the same vintage. Additives seem to have included honey, storax resin, terebinth resin, cedar oil, cyperus, juniper, and perhaps even mint, myrtle, or cinnamon, all or most of which are attested in the 18th century BC Mari texts from Mesopotamia and the 15th century BC Ebers Papyrus from Egypt. These additives suggest a sophisticated understanding of the botanical landscape and the pharmacopeic skills necessary to produce a complex beverage that balanced preservation, palatability, and psychoactivity. This new study has resulted in insights unachievable in the past, which contribute to a greater understanding

  8. Characterizing a Middle Bronze palatial wine cellar from Tel Kabri, Israel.

    Directory of Open Access Journals (Sweden)

    Andrew J Koh

    Full Text Available Scholars have for generations recognized the importance of wine production, distribution, and consumption in relation to second millennium BC palatial complexes in the Mediterranean and Near East. However, direct archaeological evidence has rarely been offered, despite the prominence of ancient viticulture in administrative clay tablets, visual media, and various forms of documentation. Tartaric and syringic acids, along with evidence for resination, have been identified in ancient ceramics, but until now the archaeological contexts behind these sporadic discoveries had been uneven and vague, precluding definitive conclusions about the nature of ancient viticulture. The situation has now changed. During the 2013 excavation season of the Kabri Archaeological Project, a rare opportunity materialized when forty large storage vessels were found in situ in an enclosed room located to the west of the central courtyard within the Middle Bronze Age Canaanite palace. A comprehensive program of organic residue analysis has now revealed that all of the relatively uniform jars contain evidence for wine. Furthermore, the enclosed context inherent to a singular intact wine cellar presented an unprecedented opportunity for a scientifically intensive study, allowing for the detection of subtle differences in the ingredients or additives within similar wine jars of apparently the same vintage. Additives seem to have included honey, storax resin, terebinth resin, cedar oil, cyperus, juniper, and perhaps even mint, myrtle, or cinnamon, all or most of which are attested in the 18th century BC Mari texts from Mesopotamia and the 15th century BC Ebers Papyrus from Egypt. These additives suggest a sophisticated understanding of the botanical landscape and the pharmacopeic skills necessary to produce a complex beverage that balanced preservation, palatability, and psychoactivity. This new study has resulted in insights unachievable in the past, which contribute to a

  9. Weaning practices among pastoralists: New evidence of infant feeding patterns from Bronze Age Eurasia.

    Science.gov (United States)

    Ventresca Miller, Alicia; Hanks, Bryan K; Judd, Margaret; Epimakhov, Andrey; Razhev, Dmitry

    2017-03-01

    This paper investigates infant feeding practices through stable carbon (δ(13) C) and nitrogen (δ(15) N) isotopic analyses of human bone collagen from Kamennyi Ambar 5, a Middle Bronze Age cemetery located in central Eurasia. The results presented are unique for the time period and region, as few cemeteries have been excavated to reveal a demographic cross-section of the population. Studies of weaning among pastoral societies are infrequent and this research adds to our knowledge of the timing, potential supplementary foods, and cessation of breastfeeding practices. Samples were collected from 41 subadults (nursing) that began at 6 months of age, occurred over several years of early childhood, and was completed by 4 years of age. Our results indicate that weaning was a multi-stage process that was unique among late prehistoric pastoralist groups in Eurasia that were dependent on milk products as a supplementary food. Our discussion centers on supporting this hypothesis with modern information on central and east Eurasian herding societies including the age at which complementary foods are introduced, the types of complementary foods, and the timing of the cessation of breastfeeding. Integral to this work is the nature of pastoral economies and their dependence on animal products, the impact of complementary foods on nutrition and health, and how milk processing may have affected nutrition content and digestibility of foods. This research on Eurasian pastoralists provides insights into the complexities of weaning among prehistoric pastoral societies as well as the potential for different complementary foods to be incorporated into infant diets in the past. © 2016 Wiley Periodicals, Inc.

  10. Genetic History of Xinjiang's Uyghurs Suggests Bronze Age Multiple-Way Contacts in Eurasia.

    Science.gov (United States)

    Feng, Qidi; Lu, Yan; Ni, Xumin; Yuan, Kai; Yang, Yajun; Yang, Xiong; Liu, Chang; Lou, Haiyi; Ning, Zhilin; Wang, Yuchen; Lu, Dongsheng; Zhang, Chao; Zhou, Ying; Shi, Meng; Tian, Lei; Wang, Xiaoji; Zhang, Xi; Li, Jing; Khan, Asifullah; Guan, Yaqun; Tang, Kun; Wang, Sijia; Xu, Shuhua

    2017-10-01

    The Uyghur people residing in Xinjiang, a territory located in the far west of China and crossed by the Silk Road, are a key ethnic group for understanding the history of human dispersion in Eurasia. Here we assessed the genetic structure and ancestry of 951 Xinjiang's Uyghurs (XJU) representing 14 geographical subpopulations. We observed a southwest and northeast differentiation within XJU, which was likely shaped jointly by the Tianshan Mountains, which traverses from east to west as a natural barrier, and gene flow from both east and west directions. In XJU, we identified four major ancestral components that were potentially derived from two earlier admixed groups: one from the West, harboring European (25-37%) and South Asian ancestries (12-20%), and the other from the East, with Siberian (15-17%) and East Asian (29-47%) ancestries. By using a newly developed method, MultiWaver, the complex admixture history of XJU was modeled as a two-wave admixture. An ancient wave was dated back to ∼3,750 years ago (ya), which is much earlier than that estimated by previous studies, but fits within the range of dating of mummies that exhibited European features that were discovered in the Tarim basin, which is situated in southern Xinjiang (4,000-2,000 ya); a more recent wave occurred around 750 ya, which is in agreement with the estimate from a recent study using other methods. We unveiled a more complex scenario of ancestral origins and admixture history in XJU than previously reported, which further suggests Bronze Age massive migrations in Eurasia and East-West contacts across the Silk Road. © The Author 2017. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  11. Ancient road transport devices: Developments from the Bronze Age to the Roman Empire

    Science.gov (United States)

    Rossi, Cesare; Chondros, Thomas G.; Milidonis, Kypros F.; Savino, Sergio; Russo, Flavio

    2016-03-01

    The development of transportation systems has significantly enhanced the welfare and modernization of society. Wooden vehicles pulled by animals have been used for land transportation since the early Bronze Age. Whole-body gharries with rigid wheels pulled by oxen appeared in Crete by 2000 BC or earlier. Horses originating from the East were depicted in early Cretan seal-rings of the same period. The two-wheeled horsedrawn chariot was one of the most important inventions in history. This vehicle provided humanity its first concept of personal transport and was the key technology of war for 2000 years. Chariots of Mycenaean and Archaic Greece with light and flexible four-spoked wheels acting as spring suspensions were depicted in vase paintings. The development of this vehicle incorporated the seeds of a primitive design activity and was important for engineering. The Trojan horse since 1194 BC and the helepolis since 700 BC were the first known machines on a wheeled base transported by horses or self-powered. Ancient engineers invented bearings lubricated with fat, and Romans introduced the ancestors of ball bearings for their wagons and carts. The historic evolution of wheeled transportation systems, along with early traction, suspension, and braking systems, is presented in this paper. Analytical and numerical methods are incorporated to analyze the most conceivable loading situations of typically reconstructed wheeled transportation systems in ancient times. Traction requirements both for horse-driven machines and the power for internal motors are also analyzed. This study can serve as a basis for further development of detailed reconstruction of transportation systems in antiquity.

  12. Historical literacy and contradictory evidence in a Finnish high school setting: The Bronze Soldier of Tallinn

    Directory of Open Access Journals (Sweden)

    Anna Veijola

    2016-03-01

    Full Text Available This article revolves around three key issues. Firstly, Finnish national core curriculum fixes the focus of history teaching to students' critical and historical thinking skills and the traditional approach to history teaching as memorizing of facts and chains of events has been changing over the last 30 years. However, the Finnish core curriculum leaves a lot of maneuvering scope for schools and individual teachers and it would seem that teachers still emphasize content over skills with too little focus on historical thinking skills. Secondly, Finland has so far been lacking in research of students' historical thinking skills, even if it has been adopted as an important part of the curriculum. What existing research there is shows that only few students are able to evaluate the information available and make sense of contradictory interpretations of past events. Thirdly, this article reports an experiment that aimed at offering students more opportunities to develop their historical thinking skills and at the same time evaluated their ability for historical thinking. The case chosen was confrontation in Estonia between ethnic Russian and Estonian population around historical interpretations of the so-called Bronze Soldier that led to unrests and violence in Tallinn in 2007. Our research points out that Finnish students have a lot of weaknesses in their text skills. Furthermore, there is a need for research that would examine what kind of interventions change how students learn and how their ability for historical thinking can be improved. It would be equally important to evaluate teachers’ thinking, how they think about history and the way they implement national curriculum.

  13. Bronze flagon from Pontes with an inscription from the 29th Psalm of David

    Directory of Open Access Journals (Sweden)

    Popović Ivana

    2015-01-01

    Full Text Available During the campaign which took place in 1983 at the site of Pontes - Trajan’s Bridge near Kostol, in the layer between a house from the second half of the 9th century and a house from the 11th century, a treasury consisting of medieval iron tools placed around, or inserted into, a bronze flagon was discovered in a shallow pit. The whole find was named Treasury B. At first, the flagon itself was dated into the period between the 6th and the 8th centuries, however, we have recently dated it into the 6th-7th century. The inscription on the neck of the vessel is a paraphrase of the 3rd verse from the 29th Psalm of David. This is proof that the flagon was a liturgical vessel. In this text we are trying to show that this flagon was analogous to the specimen from the treasury from Vrap in Albania, whose deposition during the third part of the 7th century is connected with the activity of Bulgarian Khan Kuber. The Byzantine vessel was a part of treasure plundered from the Avars, and the production of this flagon, just as of that one from Pontes, can be dated into the period between the 6th century and the first half or the middle of the 7th century. [Projekat Ministarstva nauke Republike Srbije, br. 177007: Romanisation, urbanisation and transformation of urban centres of civil, military and residential character in Roman provinces in the territory of Serbia

  14. Fish remnants from the excavations of the Bronze Age barrow near Maryanskoe village (Dnepropetrovsk region, Ukraine

    Directory of Open Access Journals (Sweden)

    O. M. Kovalchuk

    2014-10-01

    Full Text Available The Bronze Age mound (2.5–2.3 kya BC is located near the Maryanskoe village (Apostolovskyi district, Dnepropetrovsk region and was excavated in 1953. The results of determination of the fish remnants, which were found during the excavation, are presented in the paper. Eleven species belonging to 9 genera, 5 families and 5 orders (Acipenseriformes, Cypriniformes, Siluriformes, Esociformes, Perciformes were identified: russian sturgeon Acipenser gueldenstaedtii Brandt et Ratzeburg, 1833, stellate sturgeon A. stellatus Pallas, 1771, common ide Idus idus (Linnaeus, 1758, common roach Rutilus rutilus (Linnaeus, 1758, pontic roach R. frisii (Nordmann, 1840, common bream Abramis brama (Linnaeus, 1758, common carp Cyprinus carpio Linnaeus, 1758, tench Tinca tinca (Linnaeus, 1758, european catfish Silurus glanis Linnaeus, 1758, northern pike Esox lucius (Linnaeus, 1758, and zander Sander lucioperca (Linnaeus, 1758. Most of them are quite common in the Dnieper river basin. It was found that carp fishes predominate in the number of species. Most of the bone remnants in the collection belong to zander, catfish and pike, while common roach, pontic roach and common bream are identified by the few bones. This may indicate a different role of these species in the diet of the local population. The ratio of skeletal elements in the collection is the evidence of the fish cutting on the site. Body length and weight was reconstructed for 64 fish specimens. It was found that they were mature and small-sized, except for catfish, pike and perch. Taking into account the characteristics of the funeral rituals of the Yamna culture population, fish bones from the mound near Maryanskoe can be remnants of the parting meal.

  15. Horse-mounted invaders from the Russo-Kazakh steppe or agricultural colonists from western Central Asia? A craniometric investigation of the Bronze Age settlement of Xinjiang.

    Science.gov (United States)

    Hemphill, Brian E; Mallory, J P

    2004-07-01

    Numerous Bronze Age cemeteries in the oases surrounding the Täklamakan Desert of the Tarim Basin in the Xinjiang Uyghur Autonomous Region, western China, have yielded both mummified and skeletal human remains. A dearth of local antecedents, coupled with woolen textiles and the apparent Western physical appearance of the population, raised questions as to where these people came from. Two hypotheses have been offered by archaeologists to account for the origins of Bronze Age populations of the Tarim Basin. These are the "steppe hypothesis" and the "Bactrian oasis hypothesis." Eight craniometric variables from 25 Aeneolithic and Bronze Age samples, comprising 1,353 adults from the Tarim Basin, the Russo-Kazakh steppe, southern China, Central Asia, Iran, and the Indus Valley, are compared to test which, if either, of these hypotheses are supported by the pattern of phenetic affinities possessed by Bronze Age inhabitants of the Tarim Basin. Craniometric differences between samples are compared with Mahalanobis generalized distance (d2), and patterns of phenetic affinity are assessed with two types of cluster analysis (the weighted pair average linkage method and the neighbor-joining method), multidimensional scaling, and principal coordinates analysis. Results obtained by this analysis provide little support for either the steppe hypothesis or the Bactrian oasis hypothesis. Rather, the pattern of phenetic affinities manifested by Bronze Age inhabitants of the Tarim Basin suggests the presence of a population of unknown origin within the Tarim Basin during the early Bronze Age. After 1200 B.C., this population experienced significant gene flow from highland populations of the Pamirs and Ferghana Valley. These highland populations may include those who later became known as the Saka and who may have served as "middlemen" facilitating contacts between East (Tarim Basin, China) and West (Bactria, Uzbekistan) along what later became known as the Great Silk Road. Copyright

  16. EXPERIMENTAL MONTAGE USED TO STUDY THE VIBRATION OF THE DRILL TOOL IN THE PROCESS OF MANUFACTURING THE BRONZE MATERIALS

    Directory of Open Access Journals (Sweden)

    Cosmin-Mihai MIRIŢOIU

    2013-05-01

    Full Text Available In this paper we present the experimental setup used to study the vibration of the drill tool, during the drilling of the bronze products. In this paper the vibrations are analyzed during the drilling on the universal lathe machines. This time, the tool is fixed in the movable boring head and will make a translation movement with constant feeding, and the workpiece spins around its axis of symmetry and it is fixed in the spindle head stock of the universal lathe machine

  17. CONTRIBUTIONS TO THE STUDY OF THE VIBRATIONS FREQUENCY OF THE DRILL TOOL IN THE PROCESS OF MANUFACTURING THE BRONZE MATERIALS

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    Cosmin-Mihai MIRIŢOIU

    2013-05-01

    Full Text Available In this paper we present the experimental testings used to study the vibration of the drill tool, during the drilling of the bronze products. We have used the experimental setup presented in Miriţoiu (2013[1]. In this paper the vibrations are analyzed during the drilling on the universal lathe machines. The main purpose of to find a correlation between the cutting speed and the frequency of the vibration by using the experimental results and the regression analysis

  18. Emission of organic compounds from mould and core binders used for casting iron, aluminium and bronze in sand moulds

    DEFF Research Database (Denmark)

    Tiedje, Niels Skat; Crepaz, Rudolf; Eggert, Torben

    2010-01-01

    of binders was monitored when cast iron, bronze and aluminium was poured in the moulds. Binder degradation was measured by collecting off gasses in a specially designed ventilation hood at a constant flow rate. Samples were taken from the ventilation system and analysed for hydrocarbons and CO content...... compositions were tested. A test method that provides uniform test conditions is described. The method can be used as general test method to analyse off gasses from binders. Moulds containing a standard size casting were produced and the amount and type of organic compounds resulting from thermal degradation...

  19. Non-utilitarian context of the burnt flint artifacts from the Bronze Age settlements in the Seversky Donets River region

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    Alexandr Kolesnik

    2017-12-01

    Full Text Available This brief overview discusses the burnt flint found at the Bronze Age settlements located in the middle flow of the Seversky Donets River region. The objects came from the settlements’ layers associated with various archaeological cultures and periods: the Late Catacomb, Babino, different stages of the Timber Grave, post-Timber Grave, and Bondarikhinskaia cultures. Archaeological context of flint pieces suggests their non-utilitarian meaning. It has been assumed that the burnt flint may reflect a part of some complex ritual connected with funerary practice.

  20. Scavengers for bacteria: Rainbow trout have two functional variants of MARCO that bind to gram-negative and -positive bacteria.

    Science.gov (United States)

    Poynter, Sarah J; Monjo, Andrea L; Micheli, Gabriella; DeWitte-Orr, Stephanie J

    2017-12-01

    Class A scavenger receptors (SR-As) are a family of surface-expressed receptors who bind a wide range of polyanionic ligands including bacterial components and nucleic acids and play a role in innate immunity. Macrophage receptor with collagenous structure (MARCO) is a SR-A family member that has been studied in mammals largely for its role in binding bacteria. To date there is little information about SR-As in general and MARCO specifically in fish, particularly what ligands individual SR-A family members bind remains largely unknown. In the present study two novel rainbow trout MARCO transcript variants have been identified and their sequence and putative protein domains have been analyzed. When overexpressed in CHSE-214, a cell line that appears to lack functional scavenger receptors, GFP-tagged rtMARCO-1 and rtMARCO-2 were able to bind gram-positive, and gram-negative bacteria of both mammalian and aquatic sources. rtMARCO appears to bind bacteria via its scavenger receptor cysteine-rich (SRCR) domain, because SRCR deleted rtMARCO-1 and -2 were unable to bind bacteria. rtMARCO did not show any binding to the yeast cell wall component zymosan or to double-stranded (ds)RNA. This is the first time rainbow trout MARCO sequences have been identified and the first in-depth study exploring their ligand binding profile. This study provides novel insight into the role of rainbow trout MARCO in bacterial innate immunity. Copyright © 2017 Elsevier Ltd. All rights reserved.

  1. Textile production in the Bronze Age: an assemblage of splindes or bobbins of yarn from the site of Terlinques (Villena, Alicante)

    OpenAIRE

    Jover Maestre, Francisco Javier; López Padilla, Juan Antonio; Machado Yanes, Carmen; Herráez Martín, M. Isabel; Rivera Núñez, Diego; Precioso Arévalo, M. Luisa; Llorach Asunción, Rafael

    2001-01-01

    The archeological field work on the Bronze Age site of Terlinques (Villena, Alicante) has given an exceptional sample of spindles or bobbins of rush fibre of yarn in a room destroyed by a violent fire. A meticulous study of these special objects and their process of analysis and restoration yields new perspectives on knowledge in first stages of textile production during Bronze Age in Eastern Spain.

    Los trabajos arqueológicos que se llevan a cabo en el yacimiento de la Edad...

  2. Juicio Circuito Camps (parte 34) : Los delitos sexuales de lesa humanidad serán analizados dentro del marco y contexto en que fueron cometidos

    OpenAIRE

    Radio Universidad Nacional de La Plata

    2013-01-01

    Se transmite a los juzgados donde se cursan expedientes que realicen las investigaciones por delitos sexuales en el marco de las causas de lesa humanidad, dentro del marco y contexto en que fueron cometidos.

  3. MarcoPolo-R: Near Earth Asteroid Sample Return Mission in ESA assessment study phase

    Science.gov (United States)

    Barucci, M. A.; Michel, P.; Cheng, A.; Böhnhardt, H.; Brucato, J. R.; Dotto, E.; Ehrenfreund, P.; Franchi, I. A.; Green, S. F.; Lara, L. M.; Marty, B.; Koschny, D.

    2012-04-01

    MarcoPolo-R is a sample return mission to a primitive Near-Earth Asteroid (NEA) selected in February 2011 for the Assessment Study Phase in the framework of ESA's Cosmic Vision 2 program. MarcoPolo-R is a European-led mission with a proposed NASA contribution. MarcoPolo-R takes advantage of three industrial studies completed as part of the previous Marco Polo mission (see ESA/SRE (2009)3). The aim of the new Assessment Study is to reduce the cost of the mission while maintaining its high science level, on the basis of advanced studies and technologies, optimization of the mission, and consolidation of the collaboration with other partners (NASA, AEB…). The main goal of the MarcoPolo-R mission is to return unaltered NEA material for detailed analysis in ground-based laboratories. The limited sampling provided by meteorites does not offer the most primitive material available in near-Earth space. More primitive material, having experienced less alteration on the asteroid, will be more friable and would not survive atmospheric entry in any discernible amount. Only in Earth laboratories can instruments measure the individual components of the complex mixture of materials that forms an asteroid regolith with the necessary precision and sensitivity to determine their precise chemical and isotopic composition. Such measurements are vital for revealing the evidence of stellar, interstellar medium, pre-solar nebula and parent body processes that are retained in primitive asteroidal material, unaltered by atmospheric entry or terrestrial contamination. It is no surprise therefore that sample return missions are considered a priority by a number of the leading space agencies. MarcoPolo-R will rendezvous with a unique kind of target, a primitive binary NEA, scientifically characterize it at multiple scales, and return a unique pristine sample to Earth unaltered by the atmospheric entry process or terrestrial weathering. The baseline target of MarcoPolo-R is the primitive

  4. Hacia un Marco Conceptual Común sobre Trazabilidad en la Cadena de Suministro de Alimentos

    Directory of Open Access Journals (Sweden)

    Dora Lucia Rincón Ballesteros

    2017-05-01

    Full Text Available Contexto: La ausencia de un marco conceptual común sobre trazabilidad en la cadena de suministro de alimentos (CSA, impide su desarrollo de manera unificada. Dicha ausencia ha generado confusión y no ha permitido evidenciar las ventajas sociales y empresariales de implementarla; además, no contar con un marco común en países como Colombia, impide el desarrollo adecuado de políticas públicas. Método: Se realizó una revisión sistemática de la literatura en cuatro etapas: protocolo de búsqueda para consultar artículos de las bases Scopus, Science Direct, ISI Web; revisión y selección de artículos relevantes, extracción de datos en tablas y formatos diseñados para dicho fin y elaboración del marco conceptual. Resultados: Se propone un marco conceptual común que abarca los siguientes aspectos, definición de trazabilidad, características y propiedades, esquemas, unidad de recurso trazable, motivadores y sistemas de captura; para el diseño e implementación de un sistema de trazabilidad en la CSA. Se evalúa la legislación internacional y nacional y se establecen elementos para su implementación. Se ejemplifica el marco conceptual propuesto para la cadena de suministro cárnica que permitiría orientar la implementación de sistemas de trazabilidad en CSA en Colombia. Conclusiones: El marco conceptual para la trazabilidad de CSA puede ser una guía para la implementación y desarrollo en las cadenas alimentarias en el contexto colombiano. Una implementación en cadenas agropecuarias permitirá la diferenciación de origen, lo que puede ser un factor competitivo para aquellos productores que realicen buenas prácticas agrícolas, así como capacidades logísticas efectivas por los demás agentes de la CSA, el efecto de su implementación debe evaluarse en especial en la incidencia sobre posicionamiento de marca y el establecimiento de precios justos, como efecto del rastreo y seguimiento del sistema de trazabilidad. Idioma: Español

  5. Mongolian “Neolithic” and Early Bronze Age ground stone tools from the northern edge of the Gobi Desert

    Directory of Open Access Journals (Sweden)

    Joan S. Schneider

    2016-10-01

    Full Text Available The transition from the Mongolian Neolithic to the Bronze Age is not well understood. Within Ikh Nart Nature Reserve, over a period of five years, we identified a number of sites with dense surface artefact scatters and features that seem to represent this transition period. Evident in those concentrations are characteristic microblade cores, microblades, “thumbnail" flake scrapers, projectile points, ground stone tools, and stone features of unknown function. Between 2012 and 2014 we collected ground stone artefacts from four sites and sediment samples from three sites. With permission of Mongolian authorities, the artefacts from one site and sediment samples from three sites were sent for botanical analyses to the University of Texas, Austin, Environmental Archaeology Laboratory. Preliminary results indicate that plant remains are present on the ground stone artefacts: dendritic long-cells from a deep pore of one artefact and starch grains from the pores of six of the seven artefacts. These data present the first opportunity to understand what resources “Neolithic” people were processing with ground stone tools in this area and further our opportunity to better understand the little-known “Neolithic”-Early Bronze Age transition period in Central Asia. This paper describes the ground stone artefacts and further explores the results of data retrieved from some of these artefacts.

  6. On Some Mechanical Properties and Wear Behavior of Sintered Bronze Based Composites Reinforced with Some Aluminides Microadditives

    Science.gov (United States)

    Feldshtein, E.; Kiełek, P.; Kiełek, T.; Dyachkova, L.; Letsko, A.

    2017-05-01

    In the paper, the changes in some mechanical properties and wear behavior of CuSn10 sintered bronze and MMCs based on this bronze reinforced with composite ultrafine aluminide powders FeAl/15 % Al2O3, NiAl/15 % Al2O3 and Ti-46Al-8Cr are described. It was observed that the presence of aluminides in the MMCs leads to an increase in the hardness, but the flexural strength may increase or decrease depending on the type of aluminide. The presence of aluminides in the MMC reduces the wear rate considerably. It is decreased in the direction of FeAl/15 % Al2O3 → NiAl/15 % Al2O3 → Ti-46Al-8Cr aluminides and for the best MMC composition the advantage is about 20 times. In the MMCs wear process, micro-craters are formed on the contact surface and it is the principal reason of a decrease in the wear rate.

  7. Effect of high energy milling time of the aluminum bronze alloy obtained by powder metallurgy with niobium carbide addition

    Energy Technology Data Exchange (ETDEWEB)

    Dias, Alexandre Nogueira Ottoboni; Silva, Aline da; Rodrigues, Carlos Alberto; Melo, Mirian de Lourdes Noronha Motta; Rodrigues, Geovani; Silva, Gilbert, E-mail: aottoboni@yahoo.com.br [Universidade Federal de Itajuba (UNIFEI), Itajuba, MG (Brazil)

    2017-05-15

    The aluminum bronze alloy is part of a class of highly reliable materials due to high mechanical strength and corrosion resistance being used in the aerospace and shipbuilding industry. It's machined to produce parts and after its use cycle, it's discarded, but third process is considered expensive and besides not being correct for environment reasons. Thus, reusing this material through the powder metallurgy (PM) route is considered advantageous. The aluminum bronze chips were submitted to high energy ball milling process with 3% of niobium carbide (NbC) addition. The NbC is a metal-ceramic composite with a ductile-brittle behaviour. It was analyzed the morphology of powders by scanning electron microscopy as well as particle size it was determined. X ray diffraction identified the phases and the influence of milling time in the diffractogram patterns. Results indicates that milling time and NbC addition improves the milling efficiency significantly and being possible to obtain nanoparticles. (author)

  8. First Paleoparasitological Report on the Animal Feces of Bronze Age Excavated from Shahr-e Sukhteh, Iran.

    Science.gov (United States)

    Makki, Mahsasadat; Dupouy-Camet, Jean; Sajjadi, Seyed Mansour Seyed; Naddaf, Saied Reza; Mobedi, Iraj; Rezaeian, Mostafa; Mohebali, Mehdi; Mowlavi, Gholamreza

    2017-04-01

    Shahr-e Sukhteh (meaning burnt city in Persian) in Iran is an archeological site dated back to around 3,200-1,800 BC. It is located in Sistan and Baluchistan Province of Iran and known as the junction of Bronze Age trade routes crossing the Iranian plateau. It was appointed as current study area for paleoparasitological investigations. Excavations at this site have revealed various archeological materials since 1967. In the present study, sheep and carnivore coprolites excavated from this site were analyzed by means of rehydration technique using TSP solution for finding helminth eggs. Dicrocoelium dendriticum, Capillaria sp., and Taenia sp. eggs were identified, while some other objects similar to Anoplocephalidae and Toxocara spp. eggs were also retrieved from the samples but their measured parameters did not match those of these species. The present paper illustrates the first paleoparasitological findings of Bronze Age in eastern Iran supporting the economic activities, peopling, and communication as well as the appropriate condition for zoonotic helminthiasis life cycle in Shahr-e Sukhteh archeological site.

  9. High performance bimorph piezoelectric MEMS harvester via bulk PZT thick films on thin beryllium-bronze substrate

    Science.gov (United States)

    Yi, Zhiran; Yang, Bin; Li, Guimiao; Liu, Jingquan; Chen, Xiang; Wang, Xiaolin; Yang, Chunsheng

    2017-07-01

    This letter presents a high performance bimorph piezoelectric MEMS harvester with bulk PZT thick films on both sides of a flexible thin beryllium-bronze substrate via bonding and thinning technologies. The upper and lower PZT layers are thinned down to about 53 μm and 76 μm, respectively, and a commercial beryllium bronze with the thickness of about 50 μm is used as the substrate. The effective volume of this device is 30.6 mm3. The harvester with a tungsten proof mass generated the close-circuit peak-to-peak voltage of 53.1 V, the output power of 0.979 mW, and the power density of 31.99 mW/cm3 with the matching load resistance of 360 kΩ at the applied acceleration amplitude of 3.5 g and the applied frequency of 77.2 Hz. Meanwhile, in order to evaluate the stability, the device was measured continuously under applied acceleration amplitudes of 1.0 g and 3.5 g for one hour and demonstrated a good stability. Then, the harvester was utilized to light up LEDs and about twenty-one serial LEDs were lighted up at resonance under an applied acceleration amplitude of 3.0 g.

  10. Particle size and kind of mica in synthesis of nontoxic bronze and gold pearlescent pigments based on nanoencapsulated hematite

    Directory of Open Access Journals (Sweden)

    Maryam Hosseini-Zori

    2015-12-01

    Full Text Available Nano-encapsulated iron oxide in Zirconium oxide-coated mica pigments are thermally stable,innocuous to human health, non-combustible, and they do not conduct electricity. They could beapplied in several industries such as thermoplastics, cosmetics, food packaging, children toys, paints,automobiles coating, security purposes, and banknotes. Nowadays, they are highly desirable inceramic decoration. In the present study, intensively dark gold to bronze colored mica clay pigments,which were based on mica flakes covered with a layer of nano-iron oxide-Zirconium oxide particles,were prepared by homogeneous precipitation of iron nitrate and Zirconium chloride ammonia in thepresence of mica flakes in two kinds of ore clay-based phlogopite and muscovite minerals. The finalcolor was obtained by thermal annealing of precipitates at a temperature of 800◦C. The pigments werecharacterized by X-Ray Diffraction, Particle size analysis, Scanning electron microscopy,Transmission electron microscopy, X-Ray fluorescence, and Simultaneous thermal analysis. Resultsindicate that nano-encapsulated iron oxide in zirconia particles have been formed on mica flakes andkinds of clay-mica can be related to obtained shade from dark gold to bronze pearl. Higher particlesize of mica flakes about phlogopite type of mica introduced pearl effects with higher L* changes indifferent angles. Muscovite performed higher hue and better pearl effect than phlogopite.

  11. Effects of brooding periods on performance of poults and grow-out small bronze turkeys in hot humid tropical environment.

    Science.gov (United States)

    Nwaodu, Chibuzo Hope; Okoro, Victor Mela Obinna; Uchegbu, Martins Chigozie; Mbajiorgu, Christian Anayochukwu

    2018-01-06

    A study was conducted to determine the effects of varied brooding regimes on the performance of small bronze turkey poults and their grow-outs. One hundred and twenty (n = 120) poults were subjected to four brooding regimes of 0-5, 0-6, 0-7, and 0-8 weeks, designated as T1, T2, T3, and T4. Each brooding regime (treatment) was applied to 3 replicates of 10 poults/replicate in a completely randomized design. The feed intake of T1 poults was higher (P grow-out turkeys in all the production parameters measured, as well as in the feed cost per kilogram weight gain of the treatment groups. This result shows that small bronze-type turkeys brooded from 0 to 8 weeks had higher efficiency in terms of feed intake, FCR, and lower economic costs compared to those brooded from 0 to 5, 0-6, and 0-7 weeks at the poult stage. However, at grow-out stage, the period of brooding did not have any effects on their performance.

  12. The KCaSrTa5O15 photocatalyst with tungsten bronze structure for water splitting and CO2 reduction.

    Science.gov (United States)

    Takayama, Tomoaki; Tanabe, Kentaro; Saito, Kenji; Iwase, Akihide; Kudo, Akihiko

    2014-11-28

    KCaSrTa5O15 with tungsten bronze structure and a band gap of 4.1 eV showed activity for water splitting without cocatalysts. The activity was improved by loading the NiO cocatalyst. The apparent quantum yield of optimized NiO-loaded KCaSrTa5O15 was 2.3% at 254 nm for water splitting. When CO2 gas was bubbled into the reactant aqueous solution, Ag cocatalyst-loaded KCaSrTa5O15 produced CO and H2 as reduction products of CO2 and H2O, respectively, and O2 as an oxidation product of H2O. The carbon source of CO was confirmed to be CO2 molecules by using (13)CO2. The ratio of the number of electrons to that of holes calculated from the amounts of products (CO, H2 and O2) was almost unity. Additionally, the ratio of the turnover number of electrons consumed for CO production to the total number of an Ag atom of the cocatalyst that was the active site for CO2 reduction was 8.6 at 20 h. These results indicate that water was consumed as an electron donor for this photocatalytic CO2 reduction in an aqueous medium. Thus, KCaSrTa5O15 with tungsten bronze structure has arisen as a new photocatalyst that is active for water splitting and CO2 reduction utilizing water as an electron donor.

  13. High-Performance Silver Window Electrodes for Top-Illuminated Organic Photovoltaics Using an Organo-molybdenum Oxide Bronze Interlayer.

    Science.gov (United States)

    Tyler, Martin S; Walker, Marc; Hatton, Ross A

    2016-05-18

    We report an organo-molybdenumn oxide bronze that enables the fabrication of high-performance silver window electrodes for top-illuminated solution processed organic photovoltaics without complicating the process of device fabrication. This hybrid material combines the function of wide-band-gap interlayer for efficient hole extraction with the role of metal electrode seed layer, enabling the fabrication of highly transparent, low-sheet-resistance silver window electrodes. Additionally it is also processed from ethanol, which ensures orthogonality with a large range of solution processed organic semiconductors. The key organic component is the low cost small molecule 3-mercaptopropionic acid, which (i) promotes metal film formation and imparts robustness at low metal thickness, (ii) reduces the contact resistance at the Ag/molybdenumn oxide bronze interface, (iii) and greatly improves the film forming properties. Silver electrodes with a thickness of 8 nm deposited by simple vacuum evaporation onto this hybrid interlayer have a sheet resistance as low as 9.7 Ohms per square and mean transparency ∼80% over the wavelength range 400-900 nm without the aid of an antireflecting layer, which makes them well-matched to the needs of organic photovoltaics and applicable to perovskite photovoltaics. The application of this hybrid material is demonstrated in two types of top-illuminated organic photovoltaic devices.

  14. Regional models of metal production in Western Asia in the Chalcolithic, Early and Middle Bronze Ages

    Directory of Open Access Journals (Sweden)

    Avilova, Liudmila

    2008-06-01

    Full Text Available The objective of this work is the reconstruction and comparative analysis of regional models of metal production in the Chalcolithic, Early and Middle Bronze Ages. The work is based on the statistical analysis of unique computer database on archaeological metal finds from four regions of the Near East: Anatolia, Mesopotamia, the Levant, and Iran. The materials are analysed by four indicators: distribution by the chronological periods, artefacts’ function, proportion of used metals and copper- based alloys. The author presents a series of conclusions concerning the preconditions for the beginnings of metal production in Western Asia and the pioneering role of Iran in its emergence, the important role the piedmont territories played in the development of metal production, the leap-like pattern of production dynamics shown by the periods, and its relation to the spread of a producing economy, long-distance exchange, and the emergence of the early civilizations.

    El objetivo de este trabajo es la reconstrucción y análisis comparativo de modelos regionales de producción metalúrgica del Calcolítico y la Edad del Bronce Inicial y Media. Se basa en el análisis estadístico de una base de datos única sobre hallazgos metálicos de cuatro regiones del Próximo Oriente: Anatolia, Mesopotamia, el Levante e Irán. Los materiales se analizan atendiendo a cuatro variables: períodos cronológicos, función de los artefactos, proporción de los metales usados y las distintas aleaciones del cobre. La autora aporta una serie de conclusiones respecto a las precondiciones para los inicios de la producción metalúrgica en el Oeste Asiático; sobre el papel pionero de Irán en su aparición; la importancia de los piedemontes en su desarrollo; el patrón no continuo que se observa en las dinámicas de producción por periodos; y su relación con la expansión de la economía de producción, el intercambio a larga distancia y la aparición de las

  15. Micromorphological investigation on ring road sediments of the Early Bronze Age site Tell Chuera, Syria

    Science.gov (United States)

    Fritzsch, Dagmar; Thiemeyer, Heinrich

    2010-05-01

    Tell Chuera is an Early Bronze Age settlement mount in NE-Syria close to the Turkish border. With a diameter of almost 1 km and a height of 18 m it is one of the biggest tells in the region between the rivers Balikh and Khabur. In 1958 the structures of the city wall was known first by Orthmann (1990). This city wall was built of air-dried mud bricks. The age of the founding of this construction is not yet clear. The earliest pottery from the place is dated around 2500 BC to 2350 BC. Inside the fortification a road was detected, which was first excavated by Novak (1995). We took sediment monoliths in 2004 from a new trench, which shows the same situation of the road. A geomagnetic prospection, that included the whole site, suggests that the road was part of the planned extension of the lower town and serves as a circular road (Meyer, in prep.). The micromorphological investigation focussed on the question, how the road was used. Did animals have had access to the town? The thin sections show different indications of the anthropogenic influence. In all samples pseudomorphs after straw are visible. In many parts ash, charred wood fragments, bone fragments, melted material and fragments of basalt and flint were observable, too. These materials are typical for sediments in streets (cf. Goldberg & Macphail, 2006). In some parts of the thin sections faecal spherulites and dung remains with faecal spherulites give an idea that ruminants used the road as well as men. Trampling structures support this assumption. Moreover, leaching of calcite, its redeposition in mottles, pseudomycels and concretions, hydromorphic stains and the translocation of silt indicate postdepositional pedogenic processes. Literature Goldberg, P., & Macphail, R. I. (2006). Practical and theoretical geoarchaeology: UK Blackwell Publishing. Meyer, J.-W. (in prep.). Überlegungen zur Siedlungsstruktur - eine erste Analyse der Ergebnisse der geomagnetischen Prospektion. In J.-W. Meyer (Ed.), Ausgrabungen

  16. Key Role of the Scavenger Receptor MARCO in Mediating Adenovirus Infection and Subsequent Innate Responses of Macrophages.

    Science.gov (United States)

    Maler, Mareike D; Nielsen, Peter J; Stichling, Nicole; Cohen, Idan; Ruzsics, Zsolt; Wood, Connor; Engelhard, Peggy; Suomalainen, Maarit; Gyory, Ildiko; Huber, Michael; Müller-Quernheim, Joachim; Schamel, Wolfgang W A; Gordon, Siamon; Jakob, Thilo; Martin, Stefan F; Jahnen-Dechent, Willi; Greber, Urs F; Freudenberg, Marina A; Fejer, György

    2017-08-01

    The scavenger receptor MARCO is expressed in several subsets of naive tissue-resident macrophages and has been shown to participate in the recognition of various bacterial pathogens. However, the role of MARCO in antiviral defense is largely unexplored. Here, we investigated whether MARCO might be involved in the innate sensing of infection with adenovirus and recombinant adenoviral vectors by macrophages, which elicit vigorous immune responses in vivo Using cells derived from mice, we show that adenovirus infection is significantly more efficient in MARCO-positive alveolar macrophages (AMs) and in AM-like primary macrophage lines (Max Planck Institute cells) than in MARCO-negative bone marrow-derived macrophages. Using antibodies blocking ligand binding to MARCO, as well as gene-deficient and MARCO-transfected cells, we show that MARCO mediates the rapid adenovirus transduction of macrophages. By enhancing adenovirus infection, MARCO contributes to efficient innate virus recognition through the cytoplasmic DNA sensor cGAS. This leads to strong proinflammatory responses, including the production of interleukin-6 (IL-6), alpha/beta interferon, and mature IL-1α. These findings contribute to the understanding of viral pathogenesis in macrophages and may open new possibilities for the development of tools to influence the outcome of infection with adenovirus or adenovirus vectors.IMPORTANCE Macrophages play crucial roles in inflammation and defense against infection. Several macrophage subtypes have been identified with differing abilities to respond to infection with both natural adenoviruses and recombinant adenoviral vectors. Adenoviruses are important respiratory pathogens that elicit vigorous innate responses in vitro and in vivo The cell surface receptors mediating macrophage type-specific adenovirus sensing are largely unknown. The scavenger receptor MARCO is expressed on some subsets of naive tissue-resident macrophages, including lung alveolar macrophages

  17. Marco jurídico de la política de telecomunicaciones

    OpenAIRE

    Carlos Labaure Aliseris

    2014-01-01

    Introducción. Generalidades. Concepto de telecomunicación. Monopolio y competencia. Políticade telecomunicaciones. Noción e instrumentos. Evolución de las políticas de telecomunicaciones. Marco jurídico de las telecomunicaciones. Régimen general. Regímenes específicos.Nos vamos a referir al marco jurídico de la política de telecomunicaciones. Se trata de una regulación sectorial, fijada por el Estado, para una actividad en que actúan sujetos públicos y privados.Dicha regulación ha estado suje...

  18. Identidad de los abogados y formación universitaria en un marco de crisis

    Directory of Open Access Journals (Sweden)

    Marcelo Héctor Efrón

    2009-06-01

    Full Text Available http://dx.doi.org/10.5007/1983-4535.2009v2n1p33   El presente trabajo, realizado en el marco del Seminario sobre Perspectivas Filosófico-Políticas de la Educación Contemporánea a cargo del Prof. Dr. Carlos Cullen, tiene como objetivo efectuar una breve una aproximación a la idea de identidad de los abogados, para posteriormente abordar algunos enfoques sobre el derecho y justicia, haciendo un rápido pasaje hacia una muy simplificada  referencia a la formación de abogados en el marco de lo que entendemos como una crisis de identidad profesional y, que se presenta temporalmente acompañando una revisión de la justicia como valor y como fin esencial del Estado.

  19. Identidad de los abogados y formación universitaria en un marco de crisis

    Directory of Open Access Journals (Sweden)

    Marcelo Héctor Efrón

    2009-12-01

    Full Text Available El presente trabajo, realizado en el marco del Seminario sobre Perspectivas Filosófico-Políticas de la Educación Contemporánea a cargo del Prof. Dr. Carlos Cullen, tiene como objetivo efectuar una breve una aproximación a la idea de identidad de los abogados, para posteriormente abordar algunos enfoques sobre el derecho y justicia, haciendo un rápido pasaje hacia una muy simplificada referencia a la formación de abogados en el marco de lo que entendemos como una crisis de identidad profesional y, que se presenta temporalmente acompañando una revisión de la justicia como valor y como fin esencial del Estado.

  20. FRAMEWORKS FOR ETHICS IN PUBLIC HEALTH MARCOS CONCEPTUALES PARA LA ÉTICA EN SALUD PÚBLICA MARCOS CONCEPTUAIS PARA A ÉTICA EM SAÚDE PÚBLICA

    Directory of Open Access Journals (Sweden)

    Bruce Jennings

    2003-01-01

    én distingue cuatro tipos de discurso de ética aplicada en salud pública: ética profesional, ética de la abogacía, ética aplicada y ética crítica. Cada uno de ellos es importante, pero el desarrollo del trabajo en ética crítica constituye la prioridad más importante dentro del estudio normativo de la salud pública en la actualidadEste texto construi um marco conceitual para o estudo normativo da saúde pública. Argumenta que será de pouca utilidade alimentar discussões em torno da ética em saúde pública sem prestar atenção ao contexto mais amplo, teórico e ideológico, das controvérsias em saúde pública e aos conflitos sociais. O autor distingue três tipos principais de utilitarismo teórico ético: contratualismo, comunitarismo e vários tipos de políticas liberais teóricas de bemestarianismo; igualitarismo liberal; liberalismo libertário; democracia deliberativa, republicanismo cívico e convervativismo cultural. Discutem-se os significados e interconexões destas formulações teóricas. Apresentam-se programas e temas de saúde pública. Distinguem-se quatro tipos de discurso ético aplicado na ética de saúde pública profissional: defesa ética, ética aplicada e ética crítica. Cada um é importante, porém, neste momento, o desenvolvimento do trabalho em ética crítica constitui a prioridade mais importante no estudo normativo de saúde pública

  1. Para uma Crítica da Razão Psicométrica

    Directory of Open Access Journals (Sweden)

    Patto Maria Helena Souza

    1997-01-01

    Full Text Available A partir da presença de testes e de laudos psicológicos na escola pública de 1º grau, o artigo discute, no marco teórico do materialismo histórico, aspectos epistemológicos e políticos do psicodiagnóstico.

  2. Robust date for the Bronze Age Avellino eruption (Somma-Vesuvius): 3945 +/-10 calBP (1995 +/- 10 calBC)

    NARCIS (Netherlands)

    Sevink, J.; van Bergen, M.J.; van der Plicht, J.; Feiken, H.; Anastasia, C.; Huizinga, A.

    2011-01-01

    We found Bronze Age lake sediments from the Agro Pontino graben (Central Italy) to contain a thin (2-3 cm) continuous tephra layer composed of lithics, crystals and minor volcanic glass. Tephrochronological and compositional constraints strongly suggest that this layer represents the Avellino pumice

  3. Neutron and X-ray characterisation of the metallurgical properties of a 7th century BC Corinthian-type bronze helmet

    Science.gov (United States)

    Pantos, E.; Kockelmann, W.; Chapon, L. C.; Lutterotti, L.; Bennet, S. L.; Tobin, M. J.; Mosselmans, J. F. W.; Pradell, T.; Salvado, N.; Butí, S.; Garner, R.; Prag, A. J. N. W.

    2005-09-01

    Neutron and synchrotron X-ray diffraction, X-ray fluorescence and FTIR were used to examine a Corinthian-type bronze helmet which is now on display at The Manchester Museum, UK. This type of helmet was manufactured out of a single piece of bronze, probably on a rod-anvil, and like all body-armour it was made to measure. Neutron diffraction sampling of the bronze volume in different areas was used to study the composition, microstructure and crystallographic texture of the alloy in order to draw conclusions about the manufacturing processes. The neutron data revealed the presence of microstrains and non-random distributions of bronze grains hinting at annealing-hammering working cycles in order to harden and shape the alloy. X-ray fluorescence showed that the main body of the helmet is a copper-tin alloy, while the noseguard contains zinc in high abundance. This key compositional difference confirms that the noseguard is not the original but is a modern substitute fabricated for restoration purposes. SR XRD and FTIR from several spots on the head and noseguard identified several surface corrosion products and showed a variation of the Cu-Sn or Cu-Zn percentage compositions, and of the mineral phases. Small samples of corrosion flakes extracted from the outside and inside of the helmet were used to obtain powder XRD patterns.

  4. The transmissional and functional context of the lexical lists from Ḫattuša and from the contemporaneous traditions in Late-Bronze-Age Syria

    NARCIS (Netherlands)

    Scheucher, Tobias Simon

    2012-01-01

    The study attempts to reconstruct aspects of the culture and knowledge transfer as involved in the import of cuneiform writing from Mesopotamia to Anatolia and Syria in the Late Bronze Age. It therefore analyzes the manuscripts called 'lexical lists' that were excavated at the Anatolian and Syrian

  5. Robust date for the Bronze Age Avellino eruption (Somma-Vesuvius) : 3945 +/- 10 calBP (1995 +/- 10 calBC)

    NARCIS (Netherlands)

    Sevink, Jan; van Bergen, Manfred J.; van der Plicht, Johannes; Feiken, Hendrik; Anastasia, Carmela; Huizinga, Annika; Maroto, Julià; Vaquero, Manuel; Arrizabalaga, Álvaro; Baena, Javier; Baquedano, Enrique; Jordá, Jesús; Julià, Ramon; Montes, Ramón; Rasines, Pedro; Wood, Rachel; Walsma, A.

    We found Bronze Age lake sediments from the Agro Pontino graben (Central Italy) to contain a thin (2-3 cm) continuous tephra layer composed of lithics, crystals and minor volcanic glass. Tephrochronological and compositional constraints strongly suggest that this layer represents the Avellino pumice

  6. Robust date for the Bronze Age Avellino eruption (Somma-Vesuvius): 3945 +/- 10 calBP (1995 +/- 10 calBC)

    NARCIS (Netherlands)

    Sevink, J.; Bergen, M.J. van; Plicht, J. van der; Feiken, H.; Anastasia, C.; Huizinga, A.

    2011-01-01

    We found Bronze Age lake sediments from the Agro Pontino graben (Central Italy) to contain a thin (2e3 cm) continuous tephra layer composed of lithics, crystals and minor volcanic glass. Tephrochronological and compositional constraints strongly suggest that this layer represents the

  7. Effect of two-stage isothermal annealing on microstructure CuAl10Fe5Ni5 bronze with additions of Si, Cr, Mo, W and C

    Directory of Open Access Journals (Sweden)

    B. P. Pisarek

    2011-07-01

    Full Text Available The aim of this study was to investigate the effect of a two-step isothermal annealing respectively at 1000 ̊C for 30 min, then at the range of 900÷450 ̊C increments 50 ̊C on the microstructure CuAl10 Ni5Fe5 bronze with additions of Si, Cr, Mo, W and C, cast into sand moulds. The study concerned the newly developed species, bronze, aluminium-iron-nickel with additions of Si, Cr, Mo, W and C. In order to determine the time and temperature for the characteristic of phase transitions that occur during heat treatment of the test method was used thermal and derivation analysis (TDA. The study was conducted on cylindrical test castings cast in the mould of moulding sand. It was affirmed that one the method TDA can appoint characteristic for phase transformations points about co-ordinates: τ (s, t ( ̊ C, and to plot out curves TTT for the studied bronze with their use. It was also found that there is a fiveisothermalannealingtemperatureranges significantly altering the microstructure of examined bronze.

  8. Kaasaegses kunstis valitseb turvalisus / Marco Scotini, Andris Brinkmanis ; intervjueerinud Eero Epner

    Index Scriptorium Estoniae

    Scotini, Marco, 1964-

    2010-01-01

    Intervjuu Milano Nuova Accademia di Belle Art'i visuaalkunstide ja kuraatoriõppe osakonna juhataja, kaasaegse kunsti ajaloo ja kuraatoriõppe professori Marco Scotini ja sama akadeemia õppejõu Andris Birkmanisega. M. Scotini pidas Kumus loengu "Kuraator loomemajanduse ajastul. Teisel pool institutsionaalset kriitikat". Muutunud kaasaja kunstimaailmast: institutsioonide kontrollist, estetiseeritud kunsti valitsemisest biennaalidel, riigi kontrollimehhanismi asendumisest majanduslikuga, kuraatoritööst, retrospektiivnäituste rohkusest jm.

  9. La solvencia empresarial: pirámides de ratios vs. marco teórico

    OpenAIRE

    Ruiz Palomo, Daniel

    2010-01-01

    En esta Tesis se analizan los principales problemas de las pirámides de ratios, ilustrando su incapacidad para explicar las causas de desequilibrio financiero. Asimismo, se propone un marco teórico y se diseñan indicadores de solvencia a partir de éste, que son aplicados a cuatro casos de empresas diferentes con fines ilustrativos. Finalmente se exponen las conclusiones del trabajo.

  10. LA TEORÍA DEL CONFLICTO. Un marco teórico necesario

    OpenAIRE

    Germán Silva García

    2008-01-01

    El trabajo realiza una revisión crítica de teoría sociológica del conflicto en sus distintas variantes, que entrecruza con aportes propios a la teoría, con el fin de construir un marco teórico idóneo para el análisis socio jurídico en Colombia.

  11. External cost calculator for Marco Polo freight transport project proposals - Call 2013 updated version

    OpenAIRE

    Martijn Brons; Panos Christidis

    2013-01-01

    The Marco Polo programme of the European Commission aims to shift or avoid freight transport off the roads to other more environmentally friendly transport modes. The programme is implemented through yearly calls for proposals. The proposals received to each call are selected for financial support inter alia on the basis of their merits in terms of environmental and social benefits. The evaluation of each proposal's merits in terms of environmental and social benefits is based on the external...

  12. External cost calculator for Marco Polo freight transport project proposals - Call 2012 version

    OpenAIRE

    BRONS MARTIJN; CHRISTIDIS Panayotis

    2012-01-01

    The Marco Polo programme of the European Commission aims to shift or avoid freight transport off the roads to other more environmentally friendly transport modes. The programme is implemented through yearly calls for proposals. The proposals received to each call are selected for financial support inter alia on the basis of their merits in terms of environmental and social benefits. The evaluation of each proposal's merits in terms of environmental and social benefits is based on the external...

  13. A Note on the 'Medieval' Passion Liturgy in San Marco, Venice, in the Eighteenth Century

    DEFF Research Database (Denmark)

    Petersen, Nils Holger

    2008-01-01

    Begravelsen af hostien langfredag eftermiddag i San Marco foregik på stort set samme måde fra det 16. til det 18. århundrede. Og dog er der mindre ændringer, der på én gang kaster lys over og vanskeliggør forståelsen af transmissionen af denne ceremoni i disse århundreder. Artiklen diskuterer - på...

  14. Final report of the key comparison CCQM-K98: Pb isotope amount ratios in bronze

    Science.gov (United States)

    Vogl, Jochen; Yim, Yong-Hyeon; Lee, Kyoung-Seok; Goenaga-Infante, Heidi; Malinowskiy, Dmitriy; Ren, Tongxiang; Wang, Jun; Vocke, Robert D., Jr.; Murphy, Karen; Nonose, Naoko; Rienitz, Olaf; Noordmann, Janine; Näykki, Teemu; Sara-Aho, Timo; Ari, Betül; Cankur, Oktay

    2014-01-01

    Isotope amount ratios are proving useful in an ever increasing array of applications that range from studies unravelling transport processes, to pinpointing the provenance of specific samples as well as trace element quantification by using isotope dilution mass spectrometry (IDMS). These expanding applications encompass fields as diverse as archaeology, food chemistry, forensic science, geochemistry, medicine and metrology. However, to be effective tools, the isotope ratio data must be reliable and traceable to enable the comparability of measurement results. The importance of traceability and comparability in isotope ratio analysis has already been recognized by the Inorganic Analysis Working Group (IAWG) within the CCQM. While the requirements for isotope ratio accuracy and precision in the case of IDMS are generally quite modest, 'absolute' Pb isotope ratio measurements for geochemical applications as well as forensic provenance studies require Pb isotope ratio measurements of the highest quality. To support present and future CMCs on isotope ratio determinations, a key comparison was urgently needed and therefore initiated at the IAWG meeting in Paris in April 2011. The analytical task within such a comparison was decided to be the measurement of Pb isotope amount ratios in water and bronze. Measuring Pb isotope amount ratios in an aqueous Pb solution tested the ability of analysts to correct for any instrumental effects on the measured ratios, while the measurement of Pb isotope amount ratios in a metal matrix sample provided a real world test of the whole chemical and instrumental procedure. A suitable bronze material with a Pb mass fraction between 10 and 100 mg•kg-1 and a high purity solution of Pb with a mass fraction of approximately 100 mg•kg-1 was available at the pilot laboratory (BAM), both offering a natural-like Pb isotopic composition. The mandatory measurands, the isotope amount ratios n(206Pb)/n(204Pb), n(207Pb)/n(204Pb) and n(208Pb)/n(204Pb

  15. The influence of wall thickness on the microstructure of bronze BA1055 with the additions of Si, Cr, Mo and/or W

    Directory of Open Access Journals (Sweden)

    B.P. Pisarek

    2008-12-01

    Full Text Available Aluminium bronzes belong to the high-grade constructional materials applied on the put under strongly load pieces of machines, about good sliding, resistant properties on corrosion both in the cast state how and after the thermal processing. It moves to them Cr and Si in the aim of the improvement of their usable proprieties. Additions Mo and/or W were not applied so far in the larger concentration, these elements were introduced to the melts of the copper as the components of modifiers. It was worked out therefore the new kind of bronzes casting including these elements. Make additions to the Cu-Al-Fe-Ni bronze of Si, Cr, Mo and/or W in the rise of these properties makes possible. The investigations of the influence of the wall thickness of the cast on size of crystallites were conducted: the primary phase β and intermetallic phase κ and the width separates of the secondary phase α precipitate at phase boundary. It results from conducted investigations, that in the aluminium bronze BA1055 after simultaneous makes additions Si, Cr, Mo and in the primary phase β it undergoes considerable reducing size. The addition W reduce size of the grain phase β in the thin walls of the cast 3-6 mm, and addition Cr in the range of the thickness of the wall of the cast 3-6 mm it favors to reducing size the phase β, in walls 12-25 mm the growth causes it. The addition Mo does not influence the change of the size of the grain of the β phase significantly. The make addition singly or simultaneously of the Cr, Mo and W to the bronze CuAl10Fe5Ni5Si it influences the decrease of the quantity separates of the phase α on the interface boundary and of width it separates independently from the thickness of the wall of the cast. The simultaneous make addition of the Si, Cr, Mo and W it enlarges the surface of the phase κFe, κMo. The make addition to the bronze CuAl10Fe5Ni5Si of the Cr, Mo or W the quantity of crystallizing hard phase κ enlarges and the

  16. Specific corrosion product on interior surface of a bronze wine vessel with loop-handle and its growth mechanism, Shang Dynasty, China

    Energy Technology Data Exchange (ETDEWEB)

    Li Yang; Bao Zhirong; Wu Taotao [School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072 (China); Jiang, Junchun [Xiaogan Museum, Xiaogan 432000 (China); Chen Guantao [Center for Archaeometry, Wuhan University, Wuhan 430072 (China); Pan Chunxu, E-mail: cxpan@whu.edu.cn [School of Physics and Technology, Center for Electron Microscopy and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072 (China); Center for Archaeometry, Wuhan University, Wuhan 430072 (China)

    2012-06-15

    In this paper, a kind of specific stalactitic product was found on the interior surface of a covered bronze wine vessel with loop-handle (Chinese name is you), which was fabricated in Shang Dynasty (1700 B.C.-1100 B.C.) and now is collected in Xiaogan Museum, Hubei province of China. The microstructures of the product were characterized systematically by using optical microscopy, scanning electron microscope, transmission electron microscope, X-ray diffraction, and Raman microscopy. The experimental results revealed that the product belonged to a kind of malachite with high purity and high crystallinity. The growth of the product was considered to be a possible reason that the vessel was overly airtight within a museum display cabinet besides a lid of the vessel, which made the excess of H{sub 2}O and CO{sub 2} gas concentrations inside the vessel during long-term storage. This corrosion product is very harmful to bronze cultural relics, because of a large amount of copper consumption from the matrix which will reduce its life. The growth mechanism of the specific stalactitic product and the suggestions for preservation of the similar bronze relics in museum were proposed. - Highlights: Black-Right-Pointing-Pointer The stalactitic product was the high purity and good crystallinity malachite. Black-Right-Pointing-Pointer Its growth was related to the excess of H{sub 2}O and CO{sub 2} gas concentrations in museum. Black-Right-Pointing-Pointer It is harmful to the bronzes, because copper will be consumed from the matrix. Black-Right-Pointing-Pointer The suggestions for preservation of the similar bronzes in museum were proposed.

  17. GrootGroenPlus toont ontwikkelingen in het sortiment : interview met Marco Hoffman over ontwikkelingen in het sortiment

    NARCIS (Netherlands)

    Bennink, P.; Hoffman, M.H.A.

    2011-01-01

    Een rondje over vakbeurs GrootGroenPlus met sortimentsspecialist Marco Hoffman, onderzoeker bij PPO, toont de ontwikkelingen in dat sortiment. De tendens is dat planten gezonder en compacter worden en dat er vooral veel nieuwe cultivars worden gepresenteerd.

  18. INSPIRE and MarCO - Technology Development for the First Deep Space CubeSats

    Science.gov (United States)

    Klesh, Andrew

    2016-07-01

    INSPIRE (Interplanetary NanoSpacecraft Pathfinder In a Relevant Environment) and MarCO (Mars Cube One) will open the door for tiny spacecraft to explore the solar system. INSPIRE serves as a trailblazer, designed to demonstrate new technology needed for deep space. MarCO will open the door for NanoSpacecraft to serve in support roles for much larger primary missions - in this case, providing a real-time relay of for the InSight project and will likely be the first CubeSats to reach deep space. Together, these four spacecraft (two for each mission) enable fundamental science objectives to be met with tiny vehicles. Originally designed for a March, 2016 launch with the InSight mission to Mars, the MarCO spacecraft are now complete and in storage. When launched with the InSight lander from Vandenberg Air Force Base, the spacecraft will begin a 6.5 month cruise to Mars. Soon after InSight itself separates from the upper stage of the launch vehicle, the two MarCO CubeSats will deploy and independently fly to Mars to support telecommunications relay for InSight's entry, descent, and landing sequence. These spacecraft will have onboard capability for deep space trajectory correction maneuvers; high-speed direct-to-Earth & DSN-compatible communications; an advanced navigation transponder; a large deployable reflect-array high gain antenna; and a robust software suite. This talk will present an overview of the INSPIRE and MarCO projects, including a concept of operations, details of the spacecraft and subsystem design, and lessons learned from integration and test. Finally, the talk will outline how lessons from these spacecraft are already being utilized in the next generation of interplanetary CubeSats, as well as a brief vision of their applicability for solar system exploration. The research described here was carried out at the Jet Propulsion Laboratory, Caltech, under a contract with the National Aeronautics and Space Administration (NASA).

  19. Early atmospheric metal pollution provides evidence for Chalcolithic/Bronze Age mining and metallurgy in Southwestern Europe.

    Science.gov (United States)

    Martínez Cortizas, Antonio; López-Merino, Lourdes; Bindler, Richard; Mighall, Tim; Kylander, Malin E

    2016-03-01

    Although archaeological research suggests that mining/metallurgy already started in the Chalcolithic (3rd millennium BC), the earliest atmospheric metal pollution in SW Europe has thus far been dated to ~3500-3200 cal.yr. BP in paleo-environmental archives. A low intensity, non-extensive mining/metallurgy and the lack of appropriately located archives may be responsible for this mismatch. We have analysed the older section (>2100 cal.yr. BP) of a peat record from La Molina (Asturias, Spain), a mire located in the proximity (35-100 km) of mines which were exploited in the Chalcolithic/Bronze Age, with the aim of assessing evidence of this early mining/metallurgy. Analyses included the determination of C as a proxy for organic matter content, lithogenic elements (Si, Al, Ti) as markers of mineral matter, and trace metals (Cr, Cu, Zn, Pb) and stable Pb isotopes as tracers of atmospheric metal pollution. From ~8000 to ~4980 cal.yr. BP the Pb composition is similar to that of the underlying sediments (Pb 15 ± 4 μg g(-1); (206)Pb/(207)Pb 1.204 ± 0.002). A sustained period of low (206)Pb/(207)Pb ratios occurred from ~4980 to ~2470 cal.yr. BP, which can be divided into four phases: Chalcolithic (~4980-3700 cal.yr. BP), (206)Pb/(207)Pb ratios decline to 1.175 and Pb/Al ratios increase; Early Bronze Age (~3700-3500 cal.yr. BP), (206)Pb/(207)Pb increase to 1.192 and metal/Al ratios remain stable; Late Bronze Age (~3500-2800 cal.yr. BP), (206)Pb/(207)Pb decline to their lowest values (1.167) while Pb/Al and Zn/Al increase; and Early Iron Age (~2800-2470 cal.yr. BP), (206)Pb/(207)Pb increase to 1.186, most metal/Al ratios decrease but Zn/Al shows a peak. At the beginning of the Late Iron Age, (206)Pb/(207)Pb ratios and metal enrichments show a rapid return to pre-anthropogenic values. These results provide evidence of regional/local atmospheric metal pollution triggered by the earliest phases of mining/metallurgy in the area, and reconcile paleo-environmental and

  20. Early atmospheric metal pollution provides evidence for Chalcolithic/Bronze Age mining and metallurgy in Southwestern Europe

    Energy Technology Data Exchange (ETDEWEB)

    Martínez Cortizas, Antonio, E-mail: antonio.martinez.cortizas@usc.es [Departamento de Edafoloxía e Química Agrícola, Facultade de Bioloxía, Universidade de Santiago de Compostela, Campus Sur s/n, Santiago de Compostela (Spain); López-Merino, Lourdes, E-mail: lourdes.lopez-merino@brunel.ac.uk [Institute of Environment, Health and Societies, Brunel University London, UB8 3PH Uxbridge (United Kingdom); Bindler, Richard, E-mail: richard.bindler@umu.se [Department of Ecology and Environmental Science, Umeå University, Umeå (Sweden); Mighall, Tim, E-mail: t.mighall@abdn.ac.uk [Department of Geography & Environment, School of Geosciences, University of Aberdeen, Elphinstone Road, Aberdeen AB24 3UF (United Kingdom); Kylander, Malin E., E-mail: malin.kylander@geo.su.se [Department of Geological Sciences and the Bolin Centre for Climate Research, Stockholm University, SE-10691, Stockholm (Sweden)

    2016-03-01

    Although archaeological research suggests that mining/metallurgy already started in the Chalcolithic (3rd millennium BC), the earliest atmospheric metal pollution in SW Europe has thus far been dated to ~ 3500–3200 cal. yr. BP in paleo-environmental archives. A low intensity, non-extensive mining/metallurgy and the lack of appropriately located archives may be responsible for this mismatch. We have analysed the older section (> 2100 cal. yr. BP) of a peat record from La Molina (Asturias, Spain), a mire located in the proximity (35–100 km) of mines which were exploited in the Chalcolithic/Bronze Age, with the aim of assessing evidence of this early mining/metallurgy. Analyses included the determination of C as a proxy for organic matter content, lithogenic elements (Si, Al, Ti) as markers of mineral matter, and trace metals (Cr, Cu, Zn, Pb) and stable Pb isotopes as tracers of atmospheric metal pollution. From ~ 8000 to ~ 4980 cal. yr. BP the Pb composition is similar to that of the underlying sediments (Pb 15 ± 4 μg g{sup −1}; {sup 206}Pb/{sup 207}Pb 1.204 ± 0.002). A sustained period of low {sup 206}Pb/{sup 207}Pb ratios occurred from ~ 4980 to ~ 2470 cal. yr. BP, which can be divided into four phases: Chalcolithic (~ 4980–3700 cal. yr. BP), {sup 206}Pb/{sup 207}Pb ratios decline to 1.175 and Pb/Al ratios increase; Early Bronze Age (~ 3700–3500 cal. yr. BP), {sup 206}Pb/{sup 207}Pb increase to 1.192 and metal/Al ratios remain stable; Late Bronze Age (~ 3500–2800 cal. yr. BP), {sup 206}Pb/{sup 207}Pb decline to their lowest values (1.167) while Pb/Al and Zn/Al increase; and Early Iron Age (~ 2800–2470 cal. yr. BP), {sup 206}Pb/{sup 207}Pb increase to 1.186, most metal/Al ratios decrease but Zn/Al shows a peak. At the beginning of the Late Iron Age, {sup 206}Pb/{sup 207}Pb ratios and metal enrichments show a rapid return to pre-anthropogenic values. These results provide evidence of regional/local atmospheric metal pollution triggered by the

  1. marco organizacional

    Directory of Open Access Journals (Sweden)

    Juan David Velásquez H.

    2006-01-01

    Full Text Available Ha sido ampliamente reconocida la importancia de la predicción en la toma de decisiones, y se han encontrado evidencias de que uno de los métodos más efectivos es el ajuste de los pronósticos obtenidos a partir de modelos matemáticos usando juicios informados. No obstante, existe una amplia cantidad de factores que pueden afectar la calidad y credibilidad de las predicciones; en este trabajo se examinan aquellos factores relacionados con las políticas organizacionales, y se proponen varias estrategias para su mitigación.

  2. Da palavra (Vākyapadīya)

    OpenAIRE

    Nascimento Machado, Lucas; Universidade de São Paulo

    2016-01-01

    Publicado em 2014 pela Editora UNESP, a tradução de Adriano Aprigliano do primeiro livro do Vākyapadīya (“Da palavra”), de Bhartṛhari, representa um importante marco no estudo das tradições especulativas indianas no Brasil e na América Latina, e insere-se em um projeto maior do tradutor de fazer a tradução completa do Vākyapadīya, junto à tradução de seu comentário mais antigo, o Vṛtti.

  3. Un estudio del dolor en el marco de la conducta verbal: de las aportaciones de W. E. Fordyce a la Teoría del Marco Relacional (RFT

    Directory of Open Access Journals (Sweden)

    Olga Gutiérrez Martínez

    2006-01-01

    Full Text Available En este estudio teórico se presenta una aproximación al análisis de los eventos privados en general y del dolor en particular desde una perspectiva funcionalcontextual bajo las aportaciones recientes de la conducta verbal, las relaciones arbitrarias entre eventos y la derivación de funciones psicológicas. Se hace una revisión de cómo los analistas de conducta han abordado el estudio del dolor como factor de control de otros comportamientos y, partiendo de la integración de estas aportaciones con los recientes avances del análisis de la conducta verbal, se propone la Teoría del Marco Relacional (RFT como formulación mejor articulada a la hora de ofrecer una explicación contextual del dolor. A raíz de la investigación en marcos relacionales y regulación verbal, se describe un novedoso planteamiento de los problemas clínicos de dolor como formas del trastorno de evitación experiencial (TEE que supone una aproximación a la psico(patología más parsimoniosa que la tradicional basada en la clasificación sindrómica. Además, son examinados los avances terapéuticos que se han derivado de esta concepción verbal-relacional de los problemas psicológicos, presentándose la terapia de aceptación y compromiso (ACT como un sistema terapéutico dirigido a alterar las clases de regulación verbal inefectivas y favorecer actuaciones ajustadas a los valores personales.

  4. O saber da parteira tradicional do vale do rio cimitarra: cuidando a vida

    OpenAIRE

    LAZA VÁSQUEZ,CELMIRA; Ruiz de Cárdenas, Carmen Helena

    2010-01-01

    A compilação e a análise da informação estiveram baseadas no uso de etnografia focalizada e da técnica de Spradley. A teoria da diversidade e universalidade dos cuidados culturais de Leininger tomou-se como marco teórico. O objetivo do levantamento era descrever os cuidados providenciados por parteiras tradicionais, a partir das crenças e práticas, às mulheres durante o parto na zona rural da região do vale do rio Cimitarra - Magdalena Médio. O trabalho foi desenvolvido no vale do Rio Cimi...

  5. Reconstructing the Palaeogeographies of a Neolithic - Bronze Age Settlement Mound at Ephesos, Turkey

    Science.gov (United States)

    Ehlers, Lisa; Friederike, Stock; Barbara, Horejs; Helmut, Brückner

    2014-05-01

    Although Ephesos and its surroundings has long been an area of archaeological interest and investigations, the focus has mainly been on sites related to Antiquity and Late Antiquity. Until recently systematic research concerning prehistoric phases of occupation within this region have been lacking. Due to the growing interest in these time periods along the West Anatolian coast, archaeological research projects involving the study of the newly discovered prehistoric settlement mounds located in the vicinity of the prominent ancient city were initiated. The aim of this study was to examine the palaeogeographical and geoarchaeological contexts of the mound (tell), Çukuriçi Höyük, in order to determine the thickness and age of the settlement layers as well as the spatial extent of the tell throughout the different periods of settlement. As additional research to the excavations, 20 sediment cores drilled on and around Çukuriçi Höyük were examined and their physical and geochemical properties as well as existing data were used to reconstruct the palaeoenvironment. The chronostratigraphy relies on AMS-14C ages and findings of diagnostic ceramics; a further attempt was made by luminescence dating. The results reveal that the inhabitants intentionally choose the location due to the beneficial topography, initially, i.e. during Pottery Neolithic times in the early 7th mill. BC, lying upon an elevation within a fertile alluvial plain about 1.5-2 km away from the coast. It seems that during the time of settling (Pottery Neolithic - Early Bronze Age) several rivers flowed in the direct vicinity of the tell. The elevated terrain provided the inhabitants security from the torrents. In addition, the corings reveal that the tell covers an area of about 11,000 m2 and a thickness of settlement layers of c. 8 m. Finally, as a possible result of water management conducted by the inhabitants, sediments related to low-energy depositional conditions are identified at the foot of

  6. Environmental impact of copper mining and metallurgy during the Bronze Age at Kargaly (Orenburg region, Russia

    Directory of Open Access Journals (Sweden)

    Vicent García, Juan Manuel

    2010-12-01

    Full Text Available Kargaly (Orenburg, Russia is a copper-producing region in which two main phases of mining activity have taken place: the 4th-2nd millennia BC and the 18th-20th centuries AD. This article is a comparative study on the impact of those mining episodes in the distribution of the forest resources in the region, aimed to estimate the scale of prehistoric mining and metallurgical works. For that purpose two paleopalinological sequences obtained from natural deposits located in Kargaly are analysed by inferential Statistics and Multivariate Methods. The results are compared both with a regional sampling of recent pollen rain supported by an analytical model of the present day landscape, and with the anthracological data coming from the Late Bronze Age settlement of Gorny 1. Analysis confirm the large scale of the prehistoric mining impact on the forest cover from the beginnings, as well as the strong effect of husbandry once mining works ended. These results allow us to dismiss a climatic change as main explanation for the detected diachronic variability in the palinological record. They also prove the viability of the proposed approach as a means of integrating the paleoenvironmental disciplines in Landscape Archaeology.

    Kargaly (región de Orenburgo, Rusia es una región cuprífera explotada entre los milenios IV y II cal BC y los siglos XVIII y XX d.C. El objetivo del artículo es estudiar comparativamente el impacto de estos episodios mineros en la distribución de los recursos forestales de la región, para aproximar la escala de las operaciones minero-metalúrgicas prehistóricas. Para ello se analizan con métodos estadísticos inferenciales y multivariantes dos secuencias paleopalinológicas procedentes de depósitos naturales de la región y se comparan con un muestreo regional de la lluvia polínica reciente apoyado por un modelo analítico del paisaje actual y con los datos antracol

  7. Stable Carbon Isotope Evidence for Neolithic and Bronze Age Crop Water Management in the Eastern Mediterranean and Southwest Asia

    Science.gov (United States)

    Wallace, Michael P.; Jones, Glynis; Charles, Michael; Fraser, Rebecca; Heaton, Tim H. E.; Bogaard, Amy

    2015-01-01

    In a large study on early crop water management, stable carbon isotope discrimination was determined for 275 charred grain samples from nine archaeological sites, dating primarily to the Neolithic and Bronze Age, from the Eastern Mediterranean and Western Asia. This has revealed that wheat (Triticum spp.) was regularly grown in wetter conditions than barley (Hordeum sp.), indicating systematic preferential treatment of wheat that may reflect a cultural preference for wheat over barley. Isotopic analysis of pulse crops (Lens culinaris, Pisum sativum and Vicia ervilia) indicates cultivation in highly varied water conditions at some sites, possibly as a result of opportunistic watering practices. The results have also provided evidence for local land-use and changing agricultural practices. PMID:26061494

  8. Stable Carbon Isotope Evidence for Neolithic and Bronze Age Crop Water Management in the Eastern Mediterranean and Southwest Asia.

    Directory of Open Access Journals (Sweden)

    Michael P Wallace

    Full Text Available In a large study on early crop water management, stable carbon isotope discrimination was determined for 275 charred grain samples from nine archaeological sites, dating primarily to the Neolithic and Bronze Age, from the Eastern Mediterranean and Western Asia. This has revealed that wheat (Triticum spp. was regularly grown in wetter conditions than barley (Hordeum sp., indicating systematic preferential treatment of wheat that may reflect a cultural preference for wheat over barley. Isotopic analysis of pulse crops (Lens culinaris, Pisum sativum and Vicia ervilia indicates cultivation in highly varied water conditions at some sites, possibly as a result of opportunistic watering practices. The results have also provided evidence for local land-use and changing agricultural practices.

  9. Dating the end of the Greek Bronze Age: a robust radiocarbon-based chronology from Assiros Toumba.

    Directory of Open Access Journals (Sweden)

    Kenneth Wardle

    Full Text Available Over 60 recent analyses of animal bones, plant remains, and building timbers from Assiros in northern Greece form an unique series from the 14th to the 10th century BC. With the exception of Thera, the number of 14C determinations from other Late Bronze Age sites in Greece has been small and their contribution to chronologies minimal. The absolute dates determined for Assiros through Bayesian modelling are both consistent and unexpected, since they are systematically earlier than the conventional chronologies of southern Greece by between 70 and 100 years. They have not been skewed by reference to assumed historical dates used as priors. They support high rather than low Iron Age chronologies from Spain to Israel where the merits of each are fiercely debated but remain unresolved.

  10. Production of low-background CuSn6-bronze for the CRESST dark-matter-search experiment.

    Science.gov (United States)

    Majorovits, B; Kader, H; Kraus, H; Lossin, A; Pantic, E; Petricca, F; Proebst, F; Seidel, W

    2009-01-01

    One of the most intriguing open questions in modern particle physics is the nature of the dark matter in our universe. As hypothetical weakly interacting massive particles (WIMPs) do interact with ordinary matter extremely rarely, their observation requires a very low-background detector environment regarding radioactivity as well as an advanced detector technique that allows for active discrimination of the still present radioactive contaminations. The CRESST experiment uses detectors operating at milli-Kelvin temperature. Energy deposition in the detectors is recorded via the simultaneous measurement of a phonon-mediated signal and scintillation emitted by the CaWO(4) crystal targets. The entire setup is made of carefully selected materials. In this note we report on the development of ultra-pure bronze (CuSn(6)) wire in small quantities for springs and clamps that are currently being used in the CRESST II setup.

  11. Presentation of Andronovsky Costume in Museum Exposition (on materials from Lisakovsk burial mound of the Bronze Age

    Directory of Open Access Journals (Sweden)

    Usmanova Emma R.

    2017-09-01

    Full Text Available The article features an analysis of ancient weaving technologies and women's costume of the Andronovo culture dating back to the Bronze Age. It features a reconstruction of this costume executed by the author on the basis of the discovered remains of woven textile and headwear decoration discovered in burial grounds of Lisakovsk area in the first half of 2nd Millennium B.C. (Kazakhstan, Kostanay Region, Kisakovsk. The preservation of textile base allowed the author to experimentally produce copies of two women's headwear pieces and a vest. As a result, two types of braid adornments were discovrered among grave artifacts. The author substantiates several ideas related to the meaning of the signs and symbols on costume details. As a result of research, the author presents the semantics of headwear corresponding to Andronovo culture in the context of the symbolism of costumes belonging to the traditional peoples of Middle Eurasia.

  12. Mobility during the neolithic and bronze age in northern ireland explored using strontium isotope analysis of cremated human bone.

    Science.gov (United States)

    Snoeck, Christophe; Pouncett, John; Ramsey, Greer; Meighan, Ian G; Mattielli, Nadine; Goderis, Steven; Lee-Thorp, Julia A; Schulting, Rick J

    2016-07-01

    As many individuals were cremated in Neolithic and Bronze Age Ireland, they have not featured in investigations of individual mobility using strontium isotope analysis. Here, we build on recent experiments demonstrating excellent preservation of biogenic (87) Sr/(86) Sr in calcined bone to explore mobility in prehistoric Northern Ireland. A novel method of strontium isotope analysis is applied to calcined bone alongside measurements on tooth enamel to human remains from five Neolithic and Bronze Age sites in Northern Ireland. We systematically sampled modern vegetation around each site to characterize biologically available strontium, and from this calculated expected values for humans consuming foods taken from within 1, 5, 10 and 20 Km catchments. This provides a more nuanced way of assessing human use of the landscape and mobility than the 'local' vs. 'non-local' dichotomy that is often employed. The results of this study 1) provide further support for the reliability of strontium isotope analysis on calcined bone, and 2) demonstrate that it is possible to identify isotopic differences between individuals buried at the same site, with some consuming food grown locally (within 1-5 Km) while others clearly consumed food from up to 50 Km away from their burial place. Hints of patterning emerge in spite of small sample numbers. At Ballynahatty, for instance, those represented by unburnt remains appear to have consumed food growing locally, while those represented by cremated remains did not. Furthermore, it appears that some individuals from Ballynahatty, Annaghmare and Clontygora either moved in the last few years of their life or their cremated remains were brought to the site. These results offer new insights into the choice behind coterminous cremation and inhumation rites in the Neolithic. Am J Phys Anthropol 160:397-413, 2016. © 2016 Wiley Periodicals, Inc. © 2016 Wiley Periodicals, Inc.

  13. Uma 'biblioteca sem paredes': história da criação da Bireme

    Directory of Open Access Journals (Sweden)

    Silva Márcia Regina Barros da

    2006-01-01

    Full Text Available O presente artigo analisa o processo de criação da Bireme, Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde, relacionando-o com o contextos social, político e econômico respectivos. O período em questão assistiu à solidificação da influência norte-americana no mundo ocidental, entre as décadas de 1950 e 1970. Nossa intenção foi resgatar documentos e depoimentos referenciais para discutir as questões envolvidas na implantação da então Biblioteca Regional de Medicina, iniciativa que teve grande influência no âmbito da integração cultural e científica latino-americana no campo das ciências da saúde. Procurou-se ainda estabelecer marcos analíticos que possibilitem reflexões sobre o desenvolvimento histórico da instituição e sobre seu papel como iniciativa da Organização Panamericana de Saúde.

  14. Influence of the technology of melting and inoculation preliminary alloy AlBe5 on change of concentration of Al and micro-structure of the bronze CuAl10Ni5Fe4

    Directory of Open Access Journals (Sweden)

    B. Pisarek

    2010-04-01

    Full Text Available Examining was the aim of the work: influence of the permanent temperature 1300°C ± 15°C and changing time of isothermal holding in the range 0÷50 minutes on the melting loss of aluminum in the bronze CuAl10Ni5Fe4; the quantity the slag rafining - covering Unitop BA-1 (0÷1,5% on the effectiveness of the protection of liquid bronze before the oxygenation, the quantity of the preliminary alloy - in-oculant AlBe5 (0÷1,0% on the effective compensation melting loss of aluminum and time of isothermal holding on the effect of the in-oculation of the bronze and the comparison of the effectiveness of the inoculation of the bronze in furnace and in the form. Introduced investigations resulted from the study of the new grades of the Cu-Al-Fe-Ni bronze with additions singly or simultaneously Si, Cr, Mo and/or W, to melting which necessary it is for high temperature and comparatively long time isothermal holding indispensable to the occur of the process of diffusive dissolving the high-melting of the bronze components. High temperature and lengthening the time of isothermal holding the liquid bronze in casting furnace the melting loss of Al influences the growth. Addition the slag of covering-refining Unitop BA-1 in the quantity 1,5% the bronze protects before the melting loss of aluminum by the time of isothermal holding in the temperature 1300°C about 15 minutes. Addition of the preliminary alloy AlBe5 in the quantity 0,6% it assures the effective compensation of the aluminum which melting loss undergoes for the studied parameters of the melting. The effect of the inoculation of the bronze together with diminishes the preliminary alloy AlBe5 with lengthening the time of isothermal hold-ing. Because of this, use of the method of introducing the preliminary alloy it is seems good solution on the inoculation of aluminum bronzes directly to form, unsensitive on the time of isothermal holding the bronze.

  15. Promoción de la lectura en el marco educativo

    Directory of Open Access Journals (Sweden)

    Maite Monar van Vliet

    2012-01-01

    Full Text Available La investigación ofrece una visión teóricopráctica de la promoción de la lectura en un marco educativo concreto. Por una parte, se muestra el estado de la cuestión centrándose en el marco legislativo, la investigación y la promoción de la lectura virtual y, más en concreto, en el caso del País Valenciano, donde se ubica la investigación práctica llevada a cabo. A partir de la UNESCO, la LOE y los planes de lectura se plantea una panorámica de la legislación actual. Diferentes estudios realizados por especialistas en la materia enriquecen la visión y con las plataformas virtuales se completa la descripción teórica planteada. Por otra parte, se realiza un trabajo de campo cualitativo con el objetivo de evaluar los beneficios de la web, el blog y el wiki en el aula para la promoción lectora durante el curso escolar 2010-2011 con tres grupos de tres centros diferentes. El trabajo consiste en observar la aplicación de las plataformas digitales para la promoción de la lectura en el aula y en analizar su utilidad a través del estudio de casos, el grupo de discusión y la triangulación. La investigación concluye con unas reflexiones que invitan al lector a acercarse a la promoción de la lectura en el marco educativo con tecnologías virtuales.

  16. Uranium series isotopes concentration in sediments at San Marcos and Luis L. Leon reservoirs, Chihuahua, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Méndez-García, C.; Montero-Cabrera, M. E., E-mail: elena.montero@cimav.edu.mx [Centro de Investigación en Materiales Avanzados, CIMAV, Miguel de Cervantes 120, 31109, Chihuahua, Chihuahua (Mexico); Renteria-Villalobos, M. [Facultad de Zootecnia y Ecología Universidad Autónoma de Chihuahua, Periferico Francisco R. Almada Km 1, 31410, Chihuahua (Mexico); García-Tenorio, R. [Applied Nuclear Physics Group, University of Seville, ETS Arquitectura, Avda. Reina Mercedes s/n, 41012 Seville (Spain)

    2008-01-01

    Spatial and temporal distribution of the radioisotopes concentrations were determined in sediments near the surface and core samples extracted from two reservoirs located in an arid region close to Chihuahua City, Mexico. At San Marcos reservoir one core was studied, while from Luis L. Leon reservoir one core from the entrance and another one close to the wall were investigated. ²³²Th-series, ²³⁸U-series, ⁴⁰K and ¹³⁷Cs activity concentrations (AC, Bq kg⁻¹) were determined by gamma spectrometry with a high purity Ge detector. ²³⁸U and ²³⁴U ACs were obtained by liquid scintillation and alpha spectrometry with a surface barrier detector. Dating of core sediments was performed applying CRS method to ²¹⁰Pb activities. Results were verified by ¹³⁷Cs AC. Resulting activity concentrations were compared among corresponding surface and core sediments. High ²³⁸U-series AC values were found in sediments from San Marcos reservoir, because this site is located close to the Victorino uranium deposit. Low AC values found in Luis L. Leon reservoir suggest that the uranium present in the source of the Sacramento – Chuviscar Rivers is not transported up to the Conchos River. Activity ratios (AR) ²³⁴U/²³⁸U and ²³⁸U/²²⁶Ra in sediments have values between 0.9–1.2, showing a behavior close to radioactive equilibrium in the entire basin. ²³²Th/²³⁸U, ²²⁸Ra/²²⁶Ra ARs are witnesses of the different geological origin of sediments from San Marcos and Luis L. Leon reservoirs.

  17. Science of Marco Polo : Near-Earth Object Sample Return Mission

    Science.gov (United States)

    Barucci, M. A.; Yoshikawa, Makoto; Koschny, Detlef; Boehnhardt, Hermann; Brucato, J. Robert; Coradini, Marcello; Dotto, Elisabetta; Franchi, Ian A.; Green, Simon F.; Josset, Jean-Luc; Michel, Patrick; Kawagushi, Jun; Muinonen, Karri; Oberst, Juergen; Yano, Hajime; Binzel, Richard P.

    MARCO POLO is a joint European-Japanese sample return mission to a Near-Earth Object (NEO), selected by ESA in the framework of COSMIC VISION for an assessment study. This Euro-Asian mission will go to a primitive NEO, such as C or D type, scientifically characterize it at multiple scales, and bring samples back to Earth for detailed scientific investigation. NEOs are part of the small body population in the solar system, which are leftover building blocks of the solar system formation process. They offer important clues to the chemical mixture from which planets formed about 4.6 billion years ago. The scientific objectives of Marco Polo will therefore contribute to a better understanding of the origin and evolution of the Solar System, the Earth, and possibly Life itself. Marco Polo is based on a launch with a Soyuz Fregat and consists of a Mother Spacecraft (MSC), possibly carrying a lander. The MSC would approach the target asteroid and spend a few months for global characterization of the target to select a sampling site. Then, the MSC would then descend to retrieve, using a "touch and go" manoeuvre, several samples which will be transferred to a Sample Return Capsule (SRC). The MSC would return to Earth and release the SRC into the atmosphere for ground recovery. The sample of the NEO will then be available for detailed investigation in ground-based laboratories. The scientific objectives addressed by the mission and the current status of the mission study (ESA-JAXA) will be presented and discussed.

  18. Maceió é uma cidade mítica: o mito da origem em Nise da Silveira

    Directory of Open Access Journals (Sweden)

    Walter Melo

    2007-03-01

    Full Text Available O presente artigo aborda o mito da origem da liberdade em Nise da Silveira a partir de histórias de sua infância, de seu apelido Caralâmpia - inspirador de Graciliano Ramos para compor A Terra dos Meninos Pelados - e de seu nome, retirado dos sonetos de Cláudio Manuel da Costa. As originais contribuições de Nise da Silveira no campo da saúde mental passam a ser vistas pelos grupos que dela se aproximaram como frutos de sua genialidade, encontrando explicações nos relatos autobiográfi cos de Nise da Silveira, consagrados por seus (perseguidores. O campo da saúde mental no Brasil abrange dois períodos: o da campanha prómanicomial, de 1829 até as primeiras décadas do século XX; e o da campanha antimanicomial, que tem seu marco inicial no Movimento de Trabalhadores de Saúde Mental, em 1978. Entre um movimento e outro, os trabalhos desenvolvidos nas décadas de 1930, 40 e 50 do século XX fi cam esquecidos e os autores desse período passam a ser designados pioneiros, instaurando uma variante da busca do mito das origens.

  19. Aprendizaje significativo en el marco del origen de la célula eucariota

    OpenAIRE

    Narváez Palacios, Janeth Patricia

    2012-01-01

    Las ideas desarrolladas por David Ausubel en su teoría de aprendizaje significativo (caracterizado por la interacción entre el nuevo conocimiento y el conocimiento previo) y Marco Antonio Moreira en su propuesta aprendizaje significativo critico (a través del cual el estudiante podrá formar parte de su cultura y, al mismo tiempo, no ser subyugado por ella, por sus ritos, sus mitos y sus ideologías), son aplicadas en el presente trabajo para orientar la enseñanza de la estructura celular, con ...

  20. Orden económico-social como marco de la transnacionalidad empresarial

    OpenAIRE

    García Echevarría, Santiago

    2006-01-01

    La relación entre el orden económico-social de cada país, no solo en su dimensión normativa sino también en lo que afecta a su cultura económica y social y la fuerza de la necesaria transnacionalidad de la empresa ha constituido durante década la clave del desarrollo de los pueblos. Los procesos de cambio empresarial, que se suceden en el marco de cada país, buscan en la transnacionalidad su futuro y su desarrollo. Antes y ahora la apertura es, sin duda, la referencia empresarial. La inter...

  1. La logística en su marco referencial y conceptual

    OpenAIRE

    Esperanza Lozano Alvernia

    2006-01-01

    El propósito de este artículo es realizar una aproximación al marco referencial y conceptual de la logística resaltando los aspectos más sobresalientes. De ahí que inicia con la etimología, el contexto militar y del comercio, haciendo énfasis en sus diferentes conceptualizaciones con las implicaciones que ésta tiene en las organizaciones. Asimismo, se presentan algunas consideraciones de la logística inversa para finalizar con el metalenguaje que ha generado propiciando un repertorio para den...

  2. Marco de referencia de arquitectura de software para aplicaciones web y móviles

    OpenAIRE

    Maliza Martinez, Carlos Alberto; López Mendizábal, Verónica Luisana; Mackliff Peñafiel, Verónica Vanessa

    2016-01-01

    Ante la necesidad de tener una guía para la implementación de aplicaciones informáticas, y de esta forma lograr automatizar las tareas mejorando los tiempos de respuestas de los usuarios, se ha diseñado el marco de referencia de arquitectura de software para aplicaciones web y móviles con tecnología de Software Libre y Código Abierto. La tecnología que se va emplear es la Programación Orientada a Objeto (POO) con el lenguaje de programación JAVA, una arquitectura Cliente/Servidor y el estilo ...

  3. La recogida de basura en Mega-ciudades: En el marco de la sostenibilidad

    OpenAIRE

    Tron,Fabian

    2010-01-01

    La comprensión de las sociedades urbanas complejas sólo es posible cuando se estudia tanto el sector formal como el informal que las conforma. Para explicar ambos modelos, el rubro de los Residuos surge como una de las herramientas más competentes, capaz de distinguir entre ellos, incluso cuando la demanda de la sociedad supera su marco legislativo. Un cambio de enfoque en el que se defi ne a los residuos sólidos en función a su potencial como recurso, contextualiza realidades muy divergentes...

  4. [The Hospital of the people of San Marcos. First in Aguascalientes, Mexico].

    Science.gov (United States)

    López de la Peña, Xavier A

    2013-01-01

    For centuries, the major hospital of San Juan de Dios has been historically considered the first hospital in Aguascalientes,Mexico, founded on 1685. However, in this paper we report that the Hospital of the people of San Marcos, in operation at least since 1630, was really the first hospital in the state in functions and which services to the needy population continued until today’s last notice, as of 1728. As evidence, we offer various first-hand documentary sources obtained in different archive files, which give credit to this modest charity institution. The aforementioned for the memory and pride of the history of health care in Aguascalientes and Mexico.

  5. Un marco regulatorio propicio para la inversión sostenible: el ejemplo del derecho comercial

    OpenAIRE

    Bürgi, Elisabeth

    2014-01-01

    Existe un amplio consenso internacional de que los flujos de inversión en el sector agrícola en los países en desarrollo necesitan ser aumentados. Pero hay también acuerdo en que estas inversiones deben ser sostenibles. Para ser sostenibles, no sólo ha de ser beneficioso para la economía pública, sino también para los hogares rurales y el medio ambiente en el corto y el largo plazo. Para que las inversiones sostenibles tengan lugar, dependera sobre todo del marco jurídico en el que estas inve...

  6. El nuevo teatro mexicano: la performance política de Fox y Marcos

    Directory of Open Access Journals (Sweden)

    Anne Huffschmid

    2014-06-01

    Full Text Available En México, tierra de máscaras y teatro par excellence, nacieron en años recientes dos personajes emblemáticos que han logrado (conmover al mundo espectador: el subcomandante Marcos, guerrillero-escritor enmascarado con su pipa y sus cananas cruzadas, y el presidente-ranchero Vicente Fox, con sus botas vaqueras y vestido preferentemente de mezclillas. Sus fechas de nacimiento son, respectivamente, el 1 de enero de 1994 y el 2 de julio del año 2000.

  7. La ética de la autenticidad en el nuevo marco cultural: pensando a Taylor

    OpenAIRE

    Sabio Esquíroz, Mª Pilar

    2014-01-01

    [spa] El presente trabajo tiene como objeto intentar aclarar el concepto de autenticidad, eje vertebrador de la construcción del hombre moderno, sobre todo desde el Romanticismo, porque hemos observado en el marco cultural actual una serie de fenómenos sociales, tales como la falta de solidez en las relaciones y la constante insatisfacción del sujeto, que apuntan hacia una creciente desorientación en el sujeto moral, el cual dice ser auténtico. Por ello, nos preguntamos, a) cómo es posible qu...

  8. Cultura innovativa para la universidad de servicio en el marco de la responsabilidad social universitaria

    OpenAIRE

    César Ramos Parra

    2012-01-01

    El objetivo de esta investigación fue formular estrategias para impulsar el desarrollo de una cultura innovativa para la universidad de servicio en el marco de la responsabilidad social universitaria. La metodología fue de tipo descriptiva, de campo, no experimental, transeccional, tomando como población las universidades públicas del estado Zulia. Los resultados develan la necesidad de fortalecer una cultura de grupo y de trabajo en equipo, como manera de integrar el valioso capital humano d...

  9. LA ORGANIZACIÓN RETÓRICA DEL MARCO REFERENCIAL EN TESIS DE TRABAJO SOCIAL

    OpenAIRE

    Tapia Ladino, Mónica; Burdiles Fernández,Gina

    2012-01-01

    Los estudios de géneros discursivos han prestado poca atención a las tesis o seminarios producidos para la obtención del grado de licenciatura. En este artículo se describe, desde el enfoque del genre analysis (Swales, 1990), la organización retórica del marco referencial de un conjunto de 30 tesis de pregrado elaboradas por estudiantes de la carrera de Trabajo Social de la UCSC. Se identifican cuatro movidas retóricas: teórico, conceptual, empírico y normativo. Se observa que cada una tiene ...

  10. Marco de intervención logopédica en dislexia del desarrollo

    OpenAIRE

    Jiménez-Fernández, Gracia; Sylvia DEFIOR

    2014-01-01

    Este artículo tiene como objetivo proporcionar un marco de referencia para logopedas sobre la intervención psicoeducativa de la dislexia evolutiva. En primer lugar, se recogen los principales aspectos que debe incluir la intervención individual realizada por el logopeda, como son la mejora de la fluidez lectora, de las habilidades fonológicas y, en la mayoría de las ocasiones, de la comprensión lectora. Es fundamental que exista una relación de colaboración entre el logopeda y el ...

  11. El laberinto de las sombras: desaparecer en el marco de la guerra contra las drogas

    OpenAIRE

    Carolina Robledo Silvestre

    2015-01-01

    En este artículo se propone un análisis de la desaparición de personas como un hecho sociohistórico que se ha transformado sustancialmente en las últimas dos décadas en México, tanto en la práctica como en el discurso, con el paso de un contexto de guerra sucia a un contexto de guerra contra las drogas. Las desapariciones, que antes se explicaban bajo el marco de la represión política, hoy ofrecen contornos menos claros sobre motivos y actores asociados al fenómeno. Este documento es fruto de...

  12. Marco conceptual para la evaluación de programas de salud

    OpenAIRE

    Eiliana Montero Rojas

    2004-01-01

    La evaluación como disciplina es un área relativamente nueva de las Ciencias Sociales; consecuentemente, su incorporación explícita en los programas y sistemas de salud ha llegado algo tardíamente. Este artículo presenta elementos de un marco conceptual para concebir y utilizar la evaluación en programas de salud. Se define la evaluación como una herramienta para la toma de decisiones, se discuten tendencias y temáticas de actualidad en el campo y también conceptos clave tales como teoría del...

  13. Desarrollo latinoamericano en el marco de la globalización

    OpenAIRE

    Germán Pinazo; Pilar Piqué

    2011-01-01

    Desde hace varios años que el pensamiento heterodoxo latinoamericano en lo relativo a la problemática del desarrollo se encuentra atravesado por profundas discusiones. En este marco, el primer objetivo de este trabajo es repasar críticamente las ideas centrales de lo que entendemos es la formación de un nuevo consenso sobre la temática, que bajo el nombre de neoestructuralismo o neodesarrollismo, pretende ser tanto una crítica al recetario neoliberal, como una superación del viejo desarrollis...

  14. A construção da significação da experiência do abuso sexual infantil através da narrativa: uma perspectiva interacional

    OpenAIRE

    Sell,Mariléia; Ostermann,Ana Cristina

    2015-01-01

    A pesquisa apresentada neste artigo, inscrita na Linguística Aplicada e inserida nos marcos teórico-metodológicos da Análise da Conversa (Sacks, 1992; Sacks; Schegloff; Jefferson, 1974) de natureza etnometodológica (Garfinkel, 1967), descreve e analisa qualitativamente interações entre um conselheiro tutelar e duas crianças vítimas de abuso sexual. Assumindo a necessidade de entender o abuso sexual de forma mais interdisciplinar, pesquisas sobre o uso situado da fala e sobre as práticas narra...

  15. Marco de Teodósio em Coja (Arganil) (Conventus Scallabitanus)

    OpenAIRE

    Encarnação, José d'; Lopes, Maria Conceição

    2014-01-01

    Estuda-se um miliário identificado em Coja (Arganil), em que vem registado o nome do imperador Teodósio. Pertenceria a uma via secundária que ligaria Aeminium ao interior da Lusitânia. Direcção da Faculdade de Letras da Universidade de Coimbra

  16. Dissecção total crônica da aorta - uma exceção

    Directory of Open Access Journals (Sweden)

    José Francisco Moron Morad

    2007-05-01

    Full Text Available Comentário sobre o artigo publicado: Dissecção total da aorta - Relato de Caso Maria Lourdes Peris Barbo, Mauro Henrique de Sá Adami Milman, Marcos Paulo Loewenthal Pimentel, Silvia Cristina Barreto v.1, n. 2, 1999

  17. MARCO, TLR2, and CD14 are required for macrophage cytokine responses to mycobacterial trehalose dimycolate and Mycobacterium tuberculosis.

    Directory of Open Access Journals (Sweden)

    Dawn M E Bowdish

    2009-06-01

    Full Text Available Virtually all of the elements of Mycobacterium tuberculosis (Mtb pathogenesis, including pro-inflammatory cytokine production, granuloma formation, cachexia, and mortality, can be induced by its predominant cell wall glycolipid, trehalose 6,6'-dimycolate (TDM/cord factor. TDM mediates these potent inflammatory responses via interactions with macrophages both in vitro and in vivo in a myeloid differentiation factor 88 (MyD88-dependent manner via phosphorylation of the mitogen activated protein kinases (MAPKs, implying involvement of toll-like receptors (TLRs. However, specific TLRs or binding receptors for TDM have yet to be identified. Herein, we demonstrate that the macrophage receptor with collagenous structure (MARCO, a class A scavenger receptor, is utilized preferentially to "tether" TDM to the macrophage and to activate the TLR2 signaling pathway. TDM-induced signaling, as measured by a nuclear factor-kappa B (NF-kappaB-luciferase reporter assay, required MARCO in addition to TLR2 and CD14. MARCO was used preferentially over the highly homologous scavenger receptor class A (SRA, which required TLR2 and TLR4, as well as their respective accessory molecules, in order for a slight increase in NF-kappaB signaling to occur. Consistent with these observations, macrophages from MARCO(-/- or MARCO(-/-SRA(-/- mice are defective in activation of extracellular signal-related kinase 1/2 (ERK1/2 and subsequent pro-inflammatory cytokine production in response to TDM. These results show that MARCO-expressing macrophages secrete pro-inflammatory cytokines in response to TDM by cooperation between MARCO and TLR2/CD14, whereas other macrophage subtypes (e.g. bone marrow-derived may rely somewhat less effectively on SRA, TLR2/CD14, and TLR4/MD2. Macrophages from MARCO(-/- mice also produce markedly lower levels of pro-inflammatory cytokines in response to infection with virulent Mtb. These observations identify the scavenger receptors as essential binding

  18. Endogenous Retroviral Insertions Indicate a Secondary Introduction of Domestic Sheep Lineages to the Caucasus and Central Asia between the Bronze and Iron Age

    Directory of Open Access Journals (Sweden)

    Oskar Schroeder

    2017-06-01

    Full Text Available Sheep were one of the first livestock species domesticated by humans. After initial domestication in the Middle East they were spread across Eurasia. The modern distribution of endogenous Jaagsiekte sheep retrovirus insertions in domestic sheep breeds suggests that over the course of millennia, successive introductions of improved lineages and selection for wool quality occurred in the Mediterranean region and most of Asia. Here we present a novel ancient DNA approach using data of endogenous retroviral insertions in Bronze and Iron Age domestic sheep from the Caucasus and Pamir mountain areas. Our findings support a secondary introduction of wool sheep from the Middle East between the Late Bronze Age and Iron Age into most areas of Eurasia.

  19. Endogenous Retroviral Insertions Indicate a Secondary Introduction of Domestic Sheep Lineages to the Caucasus and Central Asia between the Bronze and Iron Age.

    Science.gov (United States)

    Schroeder, Oskar; Benecke, Norbert; Frölich, Kai; Peng, Zuogang; Kaniuth, Kai; Sverchkov, Leonid; Reinhold, Sabine; Belinskiy, Andrey; Ludwig, Arne

    2017-06-20

    Sheep were one of the first livestock species domesticated by humans. After initial domestication in the Middle East they were spread across Eurasia. The modern distribution of endogenous Jaagsiekte sheep retrovirus insertions in domestic sheep breeds suggests that over the course of millennia, successive introductions of improved lineages and selection for wool quality occurred in the Mediterranean region and most of Asia. Here we present a novel ancient DNA approach using data of endogenous retroviral insertions in Bronze and Iron Age domestic sheep from the Caucasus and Pamir mountain areas. Our findings support a secondary introduction of wool sheep from the Middle East between the Late Bronze Age and Iron Age into most areas of Eurasia.

  20. El laberinto de las sombras: desaparecer en el marco de la guerra contra las drogas

    Directory of Open Access Journals (Sweden)

    Carolina Robledo Silvestre

    2015-12-01

    Full Text Available En este artículo se propone un análisis de la desaparición de personas como un hecho sociohistórico que se ha transformado sustancialmente en las últimas dos décadas en México, tanto en la práctica como en el discurso, con el paso de un contexto de guerra sucia a un contexto de guerra contra las drogas. Las desapariciones, que antes se explicaban bajo el marco de la represión política, hoy ofrecen contornos menos claros sobre motivos y actores asociados al fenómeno. Este documento es fruto de un trabajo de campo cualitativo de más de cinco años en la ciudad de Tijuana, y de revisión documental y hemerográfica que recoge textos desde inicios de la década de 1990. La información recabada indica que las disputas simbólicas actuales en el campo de la desaparición, empujadas principalmente por los movimientos de víctimas, están ampliando los marcos de reconocimiento en torno a la desaparición de personas en contextos de violencia criminal.

  1. Marco Polo, a JAXA-ESA sample return mission to a Near-Earth Object

    Science.gov (United States)

    Vernazza, P.

    2009-04-01

    Marco Polo is a sample return mission to a Near-Earth Object (NEO). It is proposed to be performed in collaboration between the European Space Agency (ESA) and the Japanese Space Agency (JAXA). Both JAXA and ESA are currently performing Phase-A studies for this mission; within ESA, the mission is studied as part of the Cosmic Vision 2015-2025 Programme. The main objective of the mission is to return unmodified material from a primitive NEO to the Earth to allow its accurate analysis in ground-based laboratories. These primitive NEOs are part of the small body population that represents the leftover building blocks of the Solar System formation process. They offer important clues to the chemical mixture from which the planets formed about 4.6 billion years ago and carry records both of the Solar System's birth and early phases. In addition, the mission will allow studying the geological evolution and physical properties of small bodies. Marco Polo will provide the first opportunity for detailed laboratory study of the most primitive materials that formed the terrestrial planets and advance our understanding of some of the fundamental issues in the origin and early evolution of the Solar System, the Earth and possibly life itself. Determining the physical properties of a NEO will also help assessing mitigation strategies for the impact risk of such an object on the Earth. This presentation will focus on the ESA side of the assessment study. The technical development status in Europe will be presented.

  2. LA RECOGIDA DE BASURA EN MEGA-CIUDADES: En el marco de la sostenibilidad

    Directory of Open Access Journals (Sweden)

    Fabian Tron

    2010-01-01

    Full Text Available La comprensión de las sociedades urbanas complejas sólo es posible cuando se estudia tanto el sector formal como el informal que las conforma. Para explicar ambos modelos, el rubro de los Residuos surge como una de las herramientas más competentes, capaz de distinguir entre ellos, incluso cuando la demanda de la sociedad supera su marco legislativo. Un cambio de enfoque en el que se defi ne a los residuos sólidos en función a su potencial como recurso, contextualiza realidades muy divergentes. Con esta acepción, la gestión de residuos dentro de las ciudades de Tokio, México, Madrid y Paris puede ser estudiada a profundidad, denotando sus principales diferencias operativas y principales vulnerabilidades. En este artículo se demuestra cómo, una vez evidenciadas las particularidades, es posible relacionar la interacción de las ciudades frente a los vacíos del marco normativo. Una comparación que destaca la capacidad innata de las sociedades a adaptarse a dichas imperfecciones, llegando a una mejor comprensión de los alcances del sector informal que, particularmente dentro de los países en desarrollo, contribuye a la efi ciencia del sistema urbano.

  3. MODELOS DE LIDERAZGO POSITIVO: MARCO TEÓRICO Y LÍNEAS DE INVESTIGACIÓN

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    Javier Blanch, Francisco Gil

    2016-09-01

    Full Text Available El objetivo de este artículo es doble, en primer lugar, se define el marco teórico del liderazgo positivo así como las razones de su aparición. Este surge vinculado al paradigma de la psicología organizacional positiva, en cuyo ámbito, se han desarrollado las diferentes formas de liderazgo que lo integran (i.e. transformacional, de servicio, espiritual, auténtico y positivo. Aunque el constructo no parece unívocamente delimitado, los diferentes tipos que se incluyen bajo esta denominaciónpresentan una gran afinidad y elementos comunes. En segundo lugar, se revisan aspectos prácticos vinculados a la investigación empírica que constatan el impacto de este tipo de liderazgo en las organizaciones y se subraya la relación entre estas formas de liderazgo y variables organizacionales positivas. Finalmente, se analizan futuras líneas de investigación para el desarrollo de este marco conceptual.

  4. Los entornos personales de aprendizaje en el marco de la educación permanente

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    Elvira E. Navas

    2013-01-01

    Full Text Available En este trabajo se presenta un estudio documental sobre el surgimiento, evolución y estado actual de la utilización y desarrollo de los Entornos Personales de Aprendizaje (Personal Learning Environment, PLE en el marco de la Educación Permanente o Aprendizaje para Toda la vida (Lifelong Learning. En primer lugar, se hace una revisión del concepto de Educación Permanente desde la literatura de inicios de siglo XX. A continuación, se procede a estudiar el término PLE, desde sus orígenes hasta la interpretación actual. Se presentan experiencias tanto nacionales como internacionales donde se ejemplifica de forma práctica la utilización de PLE en la educación universitaria. Finalmente, se hace una reflexión de cierre sobre las proyecciones de futuro del uso de los PLE en el marco de la educación permanente.

  5. Marco jurídico de la política de telecomunicaciones

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    Carlos Labaure Aliseris

    2014-02-01

    Full Text Available Introducción. Generalidades. Concepto de telecomunicación. Monopolio y competencia. Políticade telecomunicaciones. Noción e instrumentos. Evolución de las políticas de telecomunicaciones. Marco jurídico de las telecomunicaciones. Régimen general. Regímenes específicos.Nos vamos a referir al marco jurídico de la política de telecomunicaciones. Se trata de una regulación sectorial, fijada por el Estado, para una actividad en que actúan sujetos públicos y privados.Dicha regulación ha estado sujeta a cambios, en virtud del avance tecnológico de las últimas décadas en el ámbito de las telecomunicaciones.El avance tecnológico referido ha producido una verdadera revolución en las telecomunicaciones,en cuyo proceso estamos actualmente inmersos.En virtud de ello se han producido importantes modificaciones en el derecho positivo de manera de intentar de acompasar la normativa con el desarrollo tecnológico.En el campo de las telecomunicaciones se han señalado como características de esos cambios, la universalidad, la multiplicidad de medios y la convergencia entre los mismos.

  6. Governança na internet: um estudo sobre o Marco Civil brasileiro

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    Laura Vilela Rodrigues Rezende

    2016-01-01

    Full Text Available El trabajo tiene como propósito realizar un estudio sobre la legislación que rige el uso de Internet en Brasil, en el Marco Civil de Internet (Ley 12.965/2014. Se trata de una investigación descriptiva, de naturaleza cua litativa, basada en recopilación bibliográfica y estudio comparativo. Se ex pone inicialmente un breve histórico de Internet en Brasil y su panorama actual. Luego, se presenta el concepto de gobernanza en Internet y los su cesos que marcaron las discusiones acerca de esta temática. Se aborda el Marco Civil de Internet en Brasil, el histórico de su creación y los principios que lo rigen. Se concluye que es un importante instrumento oficial regla mentario para asegurar la libertad y los derechos del usuario. Su concep ción se fundamentó en la participación de la sociedad civil, lo que puede considerarse inédito en lo que se refiere a la creación de leyes reglamenta rias. Se considera que esta sea una ley sofisticada en cuanto a sus directri ces, lo que la vuelve una de las más progresistas del mundo. Pese a todo lo anterior, su trayectoria democrática de creación le otorga un carácter ge neralista y superficial.

  7. Reflexiones sobre el marco conceptual de la contabilidad financiera: El caso de Colombia

    Directory of Open Access Journals (Sweden)

    Ernesto María Sierra González

    2004-01-01

    Full Text Available Con el auge del proceso de normalización contable ha surgido una creciente preocupación académica y profesional por el establecimiento de un conjunto coherente de conceptos que sustenten el debido proceso en la emisión de normas de contabilidad y auditoría. Desde finales de los años sesenta, los organismos internacionales emisores de normas han buscado construir un marco conceptual para la contabilidad financiera, elaborado con base en la observación de la práctica contable y las metodologías de investigación propias de la filosofía de las ciencias. En Colombia, el proceso de normalización empezó hacia 1986 con la expedición del Decreto 2160. Esta medida revela la necesidad de construir políticas de estandarización de las prácticas contables y de generar un debate sobre la temática del marco conceptual en el contexto de la jurisdicción local y del desarrollo de la profesión y la disciplina contable, como herramienta fundamental del crecimiento económico y el bienestar social.

  8. Research in the type of economy and lifestyle of the Volga-Manych steppe population in the Bronze Age: controversial issues

    Directory of Open Access Journals (Sweden)

    Ochir-Goryaeva Maria A.

    2015-06-01

    Full Text Available The article deals with the development of scientific views and ideas concerning the cultural and economic type of left-bank Lower Volga region population in the Bronze Age. The study of the problem in its historical aspect makes it possible for the author to distinguish the following three stages: 1 the formation of the views about sedentary economy (1935–1955; 2 development of the nomadic cattle-breeding culture theory (1955–1977; 3 the period of parallel development of both theories (since 1977. Historiographical survey shows that the results of the study of the Volga-Manych steppe Bronze Age culture were based on the finds from funerary sites (barrows only, which reflect religious ideas rather than the real economic system and lifestyle. The settlements discovered in the steppe were traditionally attributed to the “seasonal camp of mobile pastoralists”, due to their small proportions and poor cultural layer. They remained practically unexplored and unpublished. According to the author, it is necessary to alter this approach to similar vital activity traces in the steppe regions. Moreover, the mapping of the Iron Age funerary sites allowed the author to notice that their geographical position is fundamentally different from the Bronze Age ones. This fact may indicate a different way of life. The distribution of the Early Iron Age nomadic barrows is identical with 17th–18th centuries winter camps left by the nomadic Kalmyks, while the distribution of the Bronze Age barrows aligns with the Russian peasant settlements of the end of 18th – 19th centuries.

  9. AS ETAPAS DE INSTITUCIONALIZAÇÃO DA MEDIAÇÃO NO BRASIL

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    Fernanda Braganca

    2017-06-01

    Full Text Available Trata-se de pesquisa científica que pretende fazer a análise da institucionalização da mediação no Brasil através da construção do seu marco legal e da promoção de políticas públicas e iniciativas que visam fomentar a transformação da cultura social pela paz. O objetivo é mostrar que as propostas legislativas ainda que regulem exaustivamente a matéria não são por si só suficientes para dar engrenagem à esta via consensual de solução de conflitos. Daí a importância da construção de parcerias e do impulso dado pelos órgãos públicos, sobretudo pelo Judiciário.

  10. Strength of the Bond of Structural Steel S235JR to Bronze SAE660 Produced by Casting in Pre-Mold

    Directory of Open Access Journals (Sweden)

    Zaheri M.

    2017-09-01

    Full Text Available Different methods are used for production of bronze bearings. In terms of technical specifications, the success of each of these methods depends on the bond’s strength and in terms of economic, the production method is important. In this study, the aim is to study the strength and microstructure of steel-bronze thrust bearing bond that has been produced through the casting using pre-mold. In this study, in order to bond, the raw metals are chemically washed with sulfuric acid solution for five minutes at first. Then, the molten bronze SAE660 is cast in a structural steel S235JR pre-mold. The bond’s strength has been measured using the shear test three times; the measurement of bond’s length has been done using field emission scanning electron microscope (FESEM. The results indicate that the strength of the bond is at least 94.8 MPa and bond’s length is 0.45 micrometers. Therefore, this method was successful for trust bearing application.

  11. Combatentes do gueto, guerreiros da periferia

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    Mônica Rebecca Ferrari Nunes

    2013-01-01

    Full Text Available Combatente do gueto, guerreiro da periferia, militante da causa (... Combatente do gueto é o nome de uma rua atrás do Palácio do Governo (...” conta Jairo, taxista, a propósito de sua inspiração poética, durante as filmagens de Povo lindo, povo inteligente – O Sarau da Cooperifa, documentário dirigido por Sérgio Gagliardi e Maurício Falcão, produzido, em 2008, pela DGT Filmes. O filme narra a história e os bastidores do sarau que acontece na zona sul da cidade de São Paulo, em Campo Limpo, no bar do Zé Batidão. “A periferia não tem museu, não tem teatro nem cinema, o único espaço público que tem é o bar”, explica Sérgio Vaz, um dos idealizadores do movimento que contempla na produção poética, da periferia para a periferia, a força da contestação social. A cultura como arena para a luta entre os signos monossêmicos e a pluralidade sígnica proposta pelo artista que faz da palavra ruído incômodo. O sarau da Cooperifa, o sarau do Binho também já foram objetos de estudos acadêmicos, como a tese As redes de escritura nas periferias de São Paulo, de Marco Antônio Bin, defendida no Programa de Ciências Sociais da PUCSP, em maio de 2009

  12. Particular ceramic forms in the central Balkan and northern shores of the Aegean sea in the late bronze age

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    Bulatović Aleksandar

    2011-01-01

    Full Text Available This paper deals with the appearance and development of particular ceramic forms that were prevalent on the wider territory from the lower Danube to the northern shores of the Aegean sea during the middle and Late Bronze Age. These forms relate to globular beakers, pear shaped vessels with everted rims with arch shaped handles, cups with handles with plastic applications on their upper surface, etc. Particular attention is devoted to the phenomenon of globular beakers of the LBA in the valleys of Varder, Mesta and Struma rivers. All information collected primarily through analysis of stylistic-typological characteristics of ceramics of the middle and Late Bronze Age - that took into account ritual burials, layout of settlements, trade routes and climactic conditions during that period - points to population movements from the north to the south already by the LBA, i.e. in 15th century BC. These movements contributed to the creation of particular cultural groups in the LBA in the central Balkans, such as the Brnjica cultural group. However, these movements cannot be clearly linked to the so-called Aegean Migration, and for this reason their character and chronology are subject to debate. Ultimately it can be concluded that beakers of the Zimnicea -Cherkovna-Plovdiv type appeared in the late Bronze Age in the Vlasine depression and the Danube valley through the evolution of beaker forms of cultural groups of earlier periods. Almost contemporaneously, during LBA, a variant of this ceramic form, richly ornamented (mostly with spirals and similar in manner to the cultural group Dubovac-Žuto Brdo-Grla Mare- Krna, appeared in the LBA culture in northern Greece. Clearly this stylistic mannerism, with spirals as characteristic elements, spread relatively quickly through successive migrations in the period of 15th-14th century BC, toward the south of the Balkan Peninsula, thus covering the wider territory from the southern tip of the Carpathian mountains

  13. Arranjo produtivo local e desenvolvimento sustentável: uma relação sinérgica no município de marco (CE.

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    Rafaella Alves Medeiros Alvarenga

    2013-10-01

    Full Text Available Com a evolução do próprio conceito de desenvolvimento, mediante o fortalecimento do paradigma da sustentabilidade, torna-se necessária uma evolução das discussões em torno dos arranjos produtivos locais (APLs que incorpore ponderações acerca de tais dimensões. Dessa forma, este estudo tem como objetivo geral analisar a ocorrência de práticas de desenvolvimento sustentável, com base no modelo triple bottom line, em um arranjo produtivo local. Para tanto, escolheu-se como campo empírico de estudo um APL de móveis localizado no município de Marco, no Estado do Ceará. Sua escolha para este trabalho se deveu tanto às características desse tipo de atividade, que, por depender da extração e utilização de recursos naturais, principalmente a madeira, apresenta grande relação com questões da dimensão ambiental da sustentabilidade, quanto ao reconhecimento do forte desempenho econômico do APL de Marco, que fez com que a cidade fosse reconhecida como um dos maiores polos moveleiros do Norte e Nordeste do país. Procurou-se identificar demonstrações econômicas (profit, sociais (people e ambientais (planet, bem como verificar a ocorrência de sinergia na relação arranjo produtivo e desenvolvimento sustentável. Na revisão da literatura, foram construídos tópicos sobre a abordagem teórica de arranjos produtivos locais, o papel do empresário político ou empresário coletivo, o desenvolvimento sustentável e o modelo triple bottom line. A metodologia fundamentou-se em abordagem qualitativa, cujas técnicas de coleta foram a entrevista semiestruturada, a observação e um corpus documental. Foram escolhidos intencionalmente e por acessibilidade seis empreendedores. Pode-se concluir que, com base no modelo triple bottom line, estão presentes algumas características de desenvolvimento sustentável, principalmente relacionadas às dimensões ambiental (planet e econômica (profit. A dimensão social (people ainda precisa ser

  14. Metal finds at the Middle and Late Bronze Age settlement of Scoglio del Tonno (Taranto, Apulia: results of archaeometallurgical analyses

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    Bietti Sestieri, Anna Maria

    2010-12-01

    Full Text Available Scoglio del Tonno (Taranto is a settlement with a strategic location in one of the best natural harbours of the Italian Peninsula. During the Late Bronze Age it was an emporion, a privileged and permanent landing place for ships sailing between the Aegean and Italian Peninsulas. Crucibles and a number of metal artefacts were found during its excavation (1899, Quagliati 1900; Säflund 1939; this work reports the quantitative analysis of these metal artefacts by energy dispersive X-ray fluorescence. All are made of copper alloys except for one piece, an eyelet pin made of a gold-silver-copper alloy. The examination of these objects and the analytical data obtained help reconstruct the functions of this site. Metal was systematically accumulated at Scoglio del Tonno, presumably to be shipped towards the eastern Mediterranean. The site highlights the exponential increase in northern Italian metal production during the Recent Bronze Age (ca. 14th-13th c. BC.

    Scoglio del Tonno (Taranto es un yacimiento con una posición estratégica sobre uno de los mejores puertos naturales de la península italiana. Durante el Bronce Tardío fue un emporion, lugar permanente de contactos entre el Egeo y la península italiana. Crisoles y diversos objetos de metal recuperados en las antiguas excavaciones (1899 han sido recientemente analizados con ED-XRF. Excepto una pieza (una aguja de una aleación de oro, plata y cobre, todos los objetos son aleaciones de base cobre. El estudio de los objetos de metal, incluido los datos de su composición, aporta elementos útiles para una reconstrucción de las funciones de este lugar. En Scoglio del Tonno el metal era sistemáticamente almacenado, presumiblemente para ser enviado hacia el Mediterráneo oriental. El yacimiento ilustra también el aumento exponencial de la producción de metal en el norte de Italia durante el Bronce Reciente (siglos XIV y XIII a.C..

  15. Implicaciones del marco teórico de lo imaginario en la Psicología Social

    OpenAIRE

    Teresa Aracena Vicente

    2015-01-01

    En el presente estudio abordaremos dos de las principales concepciones sobre los mecanismos implicados en la construcción significativa del mundo. Hablamos de la Teoría de las Representaciones Sociales (TRS), formulada desde la psicología, y del marco teórico de lo imaginario, formulado principalmente desde la antropología y la filosofía. Procederemos exponiendo, primero, la TRS y, posteriormente, los acercamientos al marco teórico de lo imaginario desde diferentes disciplinas, para señalar l...

  16. MARCO POLO: A Near Earth Object Sample Return Mission in the ESA program Cosmic Vision 2015-2025

    Science.gov (United States)

    Dotto, Elisabetta; Barucci, M. A.; Yoshikawa, M.; Koschny, D.; Boehnhardt, H.; Brucato, J. R.; Coradini, M.; Franchi, I. A.; Green, S. F.; Josset, J. L.; Kawaguchi, J.; Michel, P.; Muinonen, K.; Oberst, J.; Yano, H.; Binzel, R. P.

    2009-09-01

    Marco Polo is a sample return mission to a Near Earth Object. In October 2007 this mission passed the first evaluation process in the framework of the ESA Cosmic Vision 2015-2025 context. The primary objectives of this mission is to visit a primitive NEO, to characterize it at multiple scales, and to bring samples back to Earth. Marco Polo will give us the first opportunity for detailed laboratory study of the most primitive materials that formed the planets. This will allow us to improve our knowledge of the processes which governed the origin and early evolution of the Solar System, and possibly of life on Earth.

  17. Protection against inhaled oxidants through scavenging of oxidized lipids by macrophage receptors MARCO and SR-AI/II

    DEFF Research Database (Denmark)

    Dahl, Morten; Bauer, Alison K; Arredouani, Mohamed

    2007-01-01

    in lungs of ozone-resistant mice suggested an additional role protecting against inhaled oxidants. After ozone exposure, MARCO-/- mice showed greater lung injury than did MARCO+/+ mice. Ozone is known to generate oxidized, proinflammatory lipids in lung lining fluid, such as 5beta,6beta......, consistent with SRA function in binding oxidized lipids. SR-AI/II-/- mice showed similar enhanced acute lung inflammation after beta-epoxide or another inhaled oxidant (aerosolized leachate of residual oil fly ash). In contrast, subacute ozone exposure did not enhance inflammation in SR-AI/II-/- versus SR...

  18. Sample return from a Near Earth Object: Future perspectives from Marco Polo.

    Science.gov (United States)

    Brucato, John Robert; Barucci, M. A.; Boehnhardt, Hermann; Dotto, Elisabetta; Franchi, Ian; Green, Simon F.; Josset, Jean-Luc; Michel, Patrick; Muinonen, Karri; Oberst, Juergen; Binzel, Richard P.; Koschny, Detlef; Agnolon, David; Romstedt, Jens

    We are entering in a new era of space exploration defined by sample return missions. The study of extraterrestrial samples in the laboratory has given us many insights to Solar System formation and evolution, but is hampered by having to rely on the arrival of meteorites -fairly random samples from asteroids, the Moon and Mars. There is now increased interest from the scientific community in the acquisition of samples from specific parent-bodies; this is reflected by proposals for an increasing number of sample return missions within international programs of Solar System exploration. The study of extraterrestrial samples in laboratory provides new opportunities to advance fun-damental issues on the origin and evolution of the Solar System, on primordial cosmochemistry and on nature of the building blocks of terrestrial planets. Samples returned from primitive carbonaceous small bodies could help us in deciphering relevant clues on the origin and early evolution of life on Earth. Once returned on Earth, samples will undergo preliminary charac-terization and classification within dedicated sample curation facilities before being delivered to worldwide laboratories for detailed investigation of the elemental and isotopic compositions, mineralogy, petrology, organic and interstellar grain inventories, etc. The samples returned from the surface of a primitive NEO will contain material more primitive than currently avail-able from meteorites as this is generally lost during atmospheric entry, with only more coherent meteorites, the product of asteroidal modification, surviving to be collected on the surface of the Earth. Marco Polo was shortlisted for the assessment phase of ESA's Cosmic Vision program to perform a sample return from a primitive Near-Earth Object (NEO), such as a C-or D-type asteroid or extinct comet. Although the scientific objectives were very highly rated it was not selected for mission development as an ESA-only Medium Mission because it exceeded

  19. La cuestión de la subjetividad en un marco historico - cultural

    OpenAIRE

    Rey,Fernando L. González

    1998-01-01

    O artigo enfoca a questão da subjetividade da perspectiva da Psicologla Soviética e apresenta considerações sobre a epistemologla. O autor afirma que a epistemologla qualitativa toma possível a interdisciplinaridade. The paper study the subjetivity question from the view of Sovietic Psychogology and presents considerations about the epistemology. The author says the qualitative epistemology take possible the interdisciplinarity.

  20. Uranium in the Surrounding of San Marcos-Sacramento River Environment (Chihuahua, Mexico

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    Marusia Rentería-Villalobos

    2012-01-01

    Full Text Available The main interest of this study is to assess whether uranium deposits located in the San Marcos outcrops (NW of Chihuahua City, Mexico could be considered as a source of U-isotopes in its surrounding environment. Uranium activity concentrations were determined in biota, ground, and surface water by either alpha or liquid scintillation spectrometries. Major ions were analyzed by ICP-OES in surface water and its suspended matter. For determining uranium activity in biota, samples were divided in parts. The results have shown a possible lixiviation and infiltration of uranium from geological substrate into the ground and surface water, and consequently, a transfer to biota. Calculated annual effective doses by ingestion suggest that U-isotopes in biota could not negligibly contribute to the neighboring population dose. By all these considerations, it is concluded that in this zone there is natural enhancement of uranium in all environmental samples analyzed in the present work.

  1. Marco conceptual para la evaluación de programas de salud

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    Montero Rojas, Eiliana

    2004-03-01

    Full Text Available La evaluación como disciplina es un área relativamente nueva de las Ciencias Sociales; consecuentemente, su incorporación explícita en los programas y sistemas de salud ha llegado algo tardíamente. Este artículo presenta elementos de un marco conceptual para concebir y utilizar la evaluación en programas de salud. Se define la evaluación como una herramienta para la toma de decisiones, se discuten tendencias y temáticas de actualidad en el campo y también conceptos clave tales como teoría del programa y valoración de necesidades. Finalmente, se esboza una primera aproximación a dos constructos de gran interés en la evaluación de programas de salud: calidad y equidad.

  2. La logística en su marco referencial y conceptual

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    Esperanza Lozano Alvernia

    2006-01-01

    Full Text Available El propósito de este artículo es realizar una aproximación al marco referencial y conceptual de la logística resaltando los aspectos más sobresalientes. De ahí que inicia con la etimología, el contexto militar y del comercio, haciendo énfasis en sus diferentes conceptualizaciones con las implicaciones que ésta tiene en las organizaciones. Asimismo, se presentan algunas consideraciones de la logística inversa para finalizar con el metalenguaje que ha generado propiciando un repertorio para denominar las nuevas formas comunicativas con un lenguaje especializado en este campo.

  3. Calidad de empleo con enfoque de género: Propuesta de un marco conceptual

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    Claudia Jessenia Becerra

    2015-06-01

    Full Text Available Las mujeres se encuentran en peores condiciones que los hombres en la mayoría de esferas de la vida. Además de esto, ciencias como la economía, con enfoque androcéntrico, invisibilizan la problemática. El análisis de la calidad de vida laboral (CVL con enfoque de género tiene un abordaje escaso, por esta razón, en el presente artículo se presenta un marco conceptual para su análisis del cual surgen dos instrumentos de medición, uno para los trabajadores y otro para la empresa. Estos instrumentos se basan, tanto en percepciones subjetivas como en datos objetivos, los cuales permiten por un lado, analizar la CVL dentro de una empresa y por otro, comparar los niveles con enfoque de género.

  4. A joint JAXA-ESA mission to return a sample from an asteroid - Marco Polo

    Science.gov (United States)

    Green, Simon; Barucci, Antonella; Yoshikawa, Makoto; Koschny, Detlef; Böhnhardt, Hermann; Brucato, John; Coradini, Marcello; Dotto, Elizabetta; Franchi, Ian; Josset, Jean-Luc; Kawaguchi, Junichero; Michel, Patrick; Muinonen, Karri; Oberst, Jürgen; Yano, Hajime; Binzel, Richard

    2008-09-01

    Marco Polo is a joint European-Japanese sample return mission to a Near-Earth Object (NEO), selected by ESA for an assessment phase study in the frame of the Cosmic Vision 2015-2025 programme. The primary objective is to return unaltered materials from a primitive Near Earth Object (NEO) to the Earth. NEOs are part of the small body population that represents the primitive leftover building blocks of the Solar System formation process. They offer important clues to the chemical mixture from which the planets formed about 4.6 billion years ago and carry records both of the Solar System's birth/early phases and of the geological evolution of small bodies. This mission will provide the opportunity for detailed laboratory study of the most primitive materials that formed the terrestrial planets and advance our understanding of some of the fundamental issues in the origin and early evolution of the Solar System, the Earth and possibly life itself.

  5. THERMAP : a mid-infrared spectro-imager for the Marco Polo R mission

    Science.gov (United States)

    Groussin, O.; Brageot, E.; Reynaud, J.-L.; Lamy, P.; Jorda, L.; Licandro, J.; Helbert, J.; Knollenberg, J.; Kührt, E.; Delbó, M.

    2012-09-01

    We present THERMAP, a mid-infrared (8-16 μm) spectro-imager based on uncooled micro-bolometer detector arrays. Due to the recent technological development of these detectors, which have undergone significant improvements in the last decade, we wanted to test their performances for a space mission to small bodies in the inner Solar System. THERMAP was selected by ESA in January 2012 for a one year assessment study, in the framework of a call for declaration of interest in science instrumentation for the Marco Polo R Cosmic Vision mission. In this paper, we present some results of this study and in particular demonstrate that the new generation of uncooled micro-bolometer detectors has all the imaging and spectroscopic capabilities to fulfill the scientific objectives of the Marco Polo R mission. THERMAP scientific objectives - The midinfrared instrument of the Marco Polo R mission must be able i) to determine the surface temperature by mapping the entire surface with an absolute accuracy of at least 5 K (goal 1 K) above 200 K, ii) to determine the thermal inertia with an accuracy of 10% and iii) to determine the surface composition by mapping the entire surface with a spectral resolution of 70 between 8 and 16 μm. The above mappings should be performed with a spatial resolution of 10 m for the entire surface (global characterization) and 10 cm for the sampling sites (local characterization). THERMAP imaging capabilities - In order to test the imaging capabilities of the THERMAP uncooled microbolometer detector, we set up an experiment based on a 640x480 ULIS micro-bolometer array, a germanium objective and a black body. Using the results of this experiment, we show that calibrated radiometric images can be obtained down to at least 258 K (lower limit of our experiment), and that two calibration points are sufficient to determine the absolute scene temperature with an accuracy better than 1.5 K. An extrapolation to lower temperatures provides an accuracy of about 5

  6. Interweaving Stories. Hamlet in Jerusalem by Gabriele Vacis and Marco Paolini

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    Franco Nasi

    2017-12-01

    Full Text Available In march 2016, playwright and director Gabriele Vacis, together with Marco Paolini and a group of young Palestinian and Italian actors staged Amleto in Jerusalem, the last production of a “school of theater” for adolescents, directed by Vacis and Paolini. Moving from a brief introduction to the pedagogical and aesthetic philosophy that inspired this educational experience, this article offers a critical description of the structurally complex performance, in which two different theatrical genres, storytelling and tragedy, are continuously intermingled.  In the performance the text by Shakespeare is revisited, deconstructed,  and represented through fragments, which becomes the fundamental dialectical reference for a reflection on problems crucial to the young Palestinian actors, as identity, relations, vengeance, oblivion. Situating this extraordinary theatrical event in relation to the reception of Hamlet in the Arab world, this article explores the narrative development of the reflection urged by an always contemporary Hamlet.

  7. Interacción universidad y entorno: marco para el emprendimiento

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    Pedro Emilio Sanabria-Rangel

    2015-01-01

    Full Text Available El documento desarrolla el tema de la relación universidad-entorno, especialmente en lo que se refiere a la vinculación con el sector productivo como parte del desarrollo de la función de extensión universitaria. El propósito fundamental es proporcionar un marco de referencia para la creación o justificación de las unidades de emprendimiento universitarias como mecanismo de enlace para el desarrollo de la función extensión desde una de sus aproximaciones: el enfoque empresarial. Como resultado, se evidencian los enfoques, los modelos, los mecanismos y las estrategias de interacción universidad-entorno; se realiza una reflexión sobre el emprendimiento como medio para dicha interacción y se muestran las condiciones estructurales que favorecen el emprendimiento universitario.

  8. Uranium in the Surrounding of San Marcos-Sacramento River Environment (Chihuahua, Mexico)

    Science.gov (United States)

    Rentería-Villalobos, Marusia; Cortés, Manuel Reyes; Mantero, Juan; Manjón, Guillermo; García-Tenorio, Rafael; Herrera, Eduardo; Montero-Cabrera, Maria Elena

    2012-01-01

    The main interest of this study is to assess whether uranium deposits located in the San Marcos outcrops (NW of Chihuahua City, Mexico) could be considered as a source of U-isotopes in its surrounding environment. Uranium activity concentrations were determined in biota, ground, and surface water by either alpha or liquid scintillation spectrometries. Major ions were analyzed by ICP-OES in surface water and its suspended matter. For determining uranium activity in biota, samples were divided in parts. The results have shown a possible lixiviation and infiltration of uranium from geological substrate into the ground and surface water, and consequently, a transfer to biota. Calculated annual effective doses by ingestion suggest that U-isotopes in biota could not negligibly contribute to the neighboring population dose. By all these considerations, it is concluded that in this zone there is natural enhancement of uranium in all environmental samples analyzed in the present work. PMID:22536148

  9. Relaciones Internacionales de Entre Ríos: una lectura epistemológica del marco legal

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    Daniel Germán Ippolito

    2015-01-01

    Full Text Available En este artículo se examina la disparidad terminológica existente entre el marco legal que define competencias internacionales para agentes del estado provincial entrerriano y aquella utilizada frecuentemente en la literatura académica especializada. Se argumenta que el calado en la conciencia ciudadana acerca de las potencialidades de la paradiplomacia como herramienta para la promoción del desarrollo territorial, se asocia a razones de tipo lingüístico-comunicacional. El análisis se efectúa teniendo presente los condicionantes internos y externos a los cuales se asocian los principales dilemas y oportunidades para la inserción internacional de Entre Ríos. Ríos

  10. Archaeometric analysis of Roman bronze coins from the Magna Mater temple using solid-state voltammetry and electrochemical impedance spectroscopy.

    Science.gov (United States)

    Di Turo, Francesca; Montoya, Noemí; Piquero-Cilla, Joan; De Vito, Caterina; Coletti, Fulvio; Favero, Gabriele; Doménech-Carbó, Antonio

    2017-02-22

    Voltammetry of microparticles (VMP) and electrochemical impedance spectroscopy (EIS) techniques, complemented by SEM-EDX and Raman spectroscopy, were applied to a set of 15 Roman bronze coins and one Tessera from the temple of Magna Mater (Rome, Italy). The archaeological site, dated back between the second half and the end of the 4th century A.D., presented a complicated stratigraphic context. Characteristic voltammetric patterns for cuprite and tenorite for sub-microsamples of the corrosion layers of the coins deposited onto graphite electrodes in contact with 0.10 M HClO4 aqueous solution yielded a grouping of the coins into three main groups. This grouping was confirmed and refined using EIS experiments of the coins immersed in air-saturated mineral water using the reduction of dissolved oxygen as a redox probe. The electrochemical grouping of coins corroborated the complex stratigraphy of the archaeological site and, above all, the reuse of the coins during the later periods due to the economic issues related to the fall of the Roman Empire. Copyright © 2016 Elsevier B.V. All rights reserved.

  11. Oxygen isotope in archaeological bioapatites from India: Implications to climate change and decline of Bronze Age Harappan civilization.

    Science.gov (United States)

    Sarkar, Anindya; Mukherjee, Arati Deshpande; Bera, M K; Das, B; Juyal, Navin; Morthekai, P; Deshpande, R D; Shinde, V S; Rao, L S

    2016-05-25

    The antiquity and decline of the Bronze Age Harappan civilization in the Indus-Ghaggar-Hakra river valleys is an enigma in archaeology. Weakening of the monsoon after ~5 ka BP (and droughts throughout the Asia) is a strong contender for the Harappan collapse, although controversy exists about the synchroneity of climate change and collapse of civilization. One reason for this controversy is lack of a continuous record of cultural levels and palaeomonsoon change in close proximity. We report a high resolution oxygen isotope (δ(18)O) record of animal teeth-bone phosphates from an archaeological trench itself at Bhirrana, NW India, preserving all cultural levels of this civilization. Bhirrana was part of a high concentration of settlements along the dried up mythical Vedic river valley 'Saraswati', an extension of Ghaggar river in the Thar desert. Isotope and archaeological data suggest that the pre-Harappans started inhabiting this area along the mighty Ghaggar-Hakra rivers fed by intensified monsoon from 9 to 7 ka BP. The monsoon monotonically declined after 7 ka yet the settlements continued to survive from early to mature Harappan time. Our study suggests that other cause like change in subsistence strategy by shifting crop patterns rather than climate change was responsible for Harappan collapse.

  12. A Bronze Age Pre-Historic Dolmen: Laser Cleaning Techniques of Paintings and Graffiti (The Bisceglie Dolmen Case Study)

    Science.gov (United States)

    Daurelio, G.

    The whole building was included and covered by an elliptical plan tumulus as reported for other similar monuments situated in the same territory of BISCEGLIE and GIOVINAZZO (in South of Italy). The monument was built by a community established in that area to mark their territory. It has a typical funerary character (funeral urn) and it was destined to the collective sepulture in the Middle Bronze Age, as indicated by the ceramic finds, accompanying the rich dead men, copper objects and ornaments, bones and amber recovered inside together with human rests. Degradation Mapping and Laser Cleaning with Photographs, during and after the process in-situ were carried out. Black incrustations and writings (by some different felt pens, marking pens, permanent black and colored ink pigments — fluorescent and no, as well as permanent text liner markings and spayed black paint) were cleaned by using a portable Nd:YAG Laser (λ 1.06 μm — 0.53 μm, in N-Mode and Q-Switch Mode, Laser pulse duration 150 μs or 6ns — f 1 to 10Hz — E max. 500 mJ per pulse in 1st harmonic and 200 mJ per pulse in 2nd harmonic). So, according to the different ink types three different laser cleaning techniques were used.

  13. Effect of Post Heat Treatment on the Microstructure and Microhardness of Friction Stir Processed NiAl Bronze (NAB Alloy

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    Yuting Lv

    2015-09-01

    Full Text Available NiAl bronze (NAB alloy is prepared by using friction stir processing (FSP technique at a tool rotation rate of 1200 rpm and a traverse speed of 150 mm/min. A post heat treatment is performed at the temperature of 675 °C. The effect of heat treatment on the microstructure and microhardness is studied. The results show that the microstructure of the FSP NAB alloy consists of high density dislocations, retained β phase (β′ phase and recrystallized grains. When annealed at 675 °C, discontinuous static recrystallization (DSRX takes place. The content of β′ phase gradually decreases and fine κ phase is precipitated. After annealing for 2 h, both the microhardness of the FSP sample in the stir zone (SZ and the difference in hardness between the SZ and base metal decrease due to the reduction of the dislocation density and β′ phase, accompanying recrystallized grain coarsening. With further increasing of the annealing time to 4 h, the aforementioned difference in hardness nearly disappears.

  14. A piezoelectric micro generator worked at low frequency and high acceleration based on PZT and phosphor bronze bonding

    Science.gov (United States)

    Tang, Gang; Yang, Bin; Hou, Cheng; Li, Guimiao; Liu, Jingquan; Chen, Xiang; Yang, Chunsheng

    2016-12-01

    Recently, piezoelectric energy harvesters (PEHs) have been paid a lot of attention by many researchers to convert mechanical energy into electrical and low level vibration. Currently, most of PEHs worked under high frequency and low level vibration. In this paper, we propose a micro cantilever generator based on the bonding of bulk PZT wafer and phosphor bronze, which is fabricated by MEMS technology, such as mechanical chemical thinning and etching. The experimental results show that the open-circuit output voltage, output power and power density of this fabricated prototype are 35 V, 321 μW and 8664 μW cm-3 at the resonant frequency of 100.8 Hz, respectively, when it matches an optimal loading resistance of 140 kΩ under the excitation of 3.0 g acceleration. The fabricated micro generator can obtain the open-circuit stable output voltage of 61.2 V when the vibration acceleration arrives at 7.0 g. Meanwhile, when this device is pasted on the vibrating vacuum pump, the output voltage is about 11 V. It demonstrates that this novel proposed device can scavenge high vibration level energy at low frequency for powering the inertial sensors in internet of things application.

  15. Evidence that a West-East admixed population lived in the Tarim Basin as early as the early Bronze Age

    Directory of Open Access Journals (Sweden)

    Zhang Quanchao

    2010-02-01

    Full Text Available Abstract Background The Tarim Basin, located on the ancient Silk Road, played a very important role in the history of human migration and cultural communications between the West and the East. However, both the exact period at which the relevant events occurred and the origins of the people in the area remain very obscure. In this paper, we present data from the analyses of both Y chromosomal and mitochondrial DNA (mtDNA derived from human remains excavated from the Xiaohe cemetery, the oldest archeological site with human remains discovered in the Tarim Basin thus far. Results Mitochondrial DNA analysis showed that the Xiaohe people carried both the East Eurasian haplogroup (C and the West Eurasian haplogroups (H and K, whereas Y chromosomal DNA analysis revealed only the West Eurasian haplogroup R1a1a in the male individuals. Conclusion Our results demonstrated that the Xiaohe people were an admixture from populations originating from both the West and the East, implying that the Tarim Basin had been occupied by an admixed population since the early Bronze Age. To our knowledge, this is the earliest genetic evidence of an admixed population settled in the Tarim Basin.

  16. Evidence that a West-East admixed population lived in the Tarim Basin as early as the early Bronze Age.

    Science.gov (United States)

    Li, Chunxiang; Li, Hongjie; Cui, Yinqiu; Xie, Chengzhi; Cai, Dawei; Li, Wenying; Mair, Victor H; Xu, Zhi; Zhang, Quanchao; Abuduresule, Idelisi; Jin, Li; Zhu, Hong; Zhou, Hui

    2010-02-17

    The Tarim Basin, located on the ancient Silk Road, played a very important role in the history of human migration and cultural communications between the West and the East. However, both the exact period at which the relevant events occurred and the origins of the people in the area remain very obscure. In this paper, we present data from the analyses of both Y chromosomal and mitochondrial DNA (mtDNA) derived from human remains excavated from the Xiaohe cemetery, the oldest archeological site with human remains discovered in the Tarim Basin thus far. Mitochondrial DNA analysis showed that the Xiaohe people carried both the East Eurasian haplogroup (C) and the West Eurasian haplogroups (H and K), whereas Y chromosomal DNA analysis revealed only the West Eurasian haplogroup R1a1a in the male individuals. Our results demonstrated that the Xiaohe people were an admixture from populations originating from both the West and the East, implying that the Tarim Basin had been occupied by an admixed population since the early Bronze Age. To our knowledge, this is the earliest genetic evidence of an admixed population settled in the Tarim Basin.

  17. A piezoelectric micro generator worked at low frequency and high acceleration based on PZT and phosphor bronze bonding

    Science.gov (United States)

    Tang, Gang; Yang, Bin; Hou, Cheng; Li, Guimiao; Liu, Jingquan; Chen, Xiang; Yang, Chunsheng

    2016-01-01

    Recently, piezoelectric energy harvesters (PEHs) have been paid a lot of attention by many researchers to convert mechanical energy into electrical and low level vibration. Currently, most of PEHs worked under high frequency and low level vibration. In this paper, we propose a micro cantilever generator based on the bonding of bulk PZT wafer and phosphor bronze, which is fabricated by MEMS technology, such as mechanical chemical thinning and etching. The experimental results show that the open-circuit output voltage, output power and power density of this fabricated prototype are 35 V, 321 μW and 8664 μW cm−3 at the resonant frequency of 100.8 Hz, respectively, when it matches an optimal loading resistance of 140 kΩ under the excitation of 3.0 g acceleration. The fabricated micro generator can obtain the open-circuit stable output voltage of 61.2 V when the vibration acceleration arrives at 7.0 g. Meanwhile, when this device is pasted on the vibrating vacuum pump, the output voltage is about 11 V. It demonstrates that this novel proposed device can scavenge high vibration level energy at low frequency for powering the inertial sensors in internet of things application. PMID:27929139

  18. Foreign elites from the Oxus civilization? A craniometric study of anomalous burials from Bronze Age Tepe Hissar.

    Science.gov (United States)

    Hemphill, B E

    1999-12-01

    Discovery of a small number of individuals in the Period III necropolis at the large northern Iranian Bronze Age site of Tepe Hissar directly associated with a complex of imported artifacts raises the question of whether these individuals represent elites who had access to these exotic commodities, or an imposed foreign elite that may have brought these unusual artifacts from their homelands. The source of the atypical objects is believed to be the Oxus civilization of central Asia. This study investigates the identity of these individuals by employing canonical discriminant function analysis of 20 craniometric variables among 174 adult males from Tepe Hissar Period III and Oxus civilization males from Sapalli tepe and Djarkutan. Dicriminant function analysis provides a strong separation between Tepe Hissar Period III males and Oxus civilization males and a high level of correct assignation by sample (95.8%). Imposition of the five males associated with imported central Asian artifacts from the Period III necropolis indicates that the majority (4/5) are phenetically indistinguishable from other Period III Tepe Hissar males. The results indicate that these individuals most likely represent local elite inhabitants of Tepe Hissar, rather than the presence of an imposed foreign elite. However, given the scarcity of crucial specimens, especially females, and comparative skeletal series, this conclusion must remain tentative. Copyright 1999 Wiley-Liss, Inc.

  19. A paleoneurohistological study of 3,000-year-old mummified brain tissue from the mediterranean bronze age.

    Science.gov (United States)

    Prats-Muñoz, Gemma; Malgosa, Assumpció; Armentano, Nuria; Galtés, Ignasi; Esteban, Jordi; Bombi, Josep A; Tortosa, Montserrat; Fernández, Eva; Jordana, Xavier; Isidro, Albert; Fullola, Josep M; Petit, M Àngels; Guerrero, Victor M; Calvo, Manuel; Fernández, Pedro L

    2012-01-01

    Mummified nervous tissue is very rarely found in ancient remains and usually corresponds to corpses which were frozen or preserved in bogs, conditions which limit tissue autolysis and bacterial degradation. Here, we show the unusual finding of spontaneously mummified brain tissue from several individuals from the little known megalithic talaiotic culture of the island of Minorca, dating approximately 3,000 years before present and corresponding to the late Mediterranean Bronze Age. These individuals were part of an intact burial site containing 66 subjects. Intracraneal samples were carefully rehydrated with Sandison's solution. We used classical histochemical as well as 2D and 3D (scanning) electron-microscopic techniques. We provide evidence of the nervous nature of the samples as well as a detailed description of the morphological features of these ancient tissues. The intracranial material consisted of well-preserved eosinophilic reticular tissue and, although mostly absent, some exceptional pigment-containing neurons were identified. We present a detailed morphological analysis which can provide valuable information and guidelines for the interpretation of this scarce type of mummified samples and provide explanations for this surprising preservation. Copyright © 2012 S. Karger AG, Basel.

  20. Funeral sites of the beginning of the Late Bronze age in the estuarine Trans-Kama river area

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    Lyganov Anton V.

    2015-06-01

    Full Text Available The paper offers results of 2014 field research of the first stage of the late Bronze Age burial grounds in the Volga-Kama region –Novo-Mordovo II and Stary Kuybyshev VI. These burial grounds are located in the area of the abrasion escarpment of Kuybyshev dam lake, in the confluence of the Volga and the Kama rivers. The first burial ground was discovered by A.H. Khalikov in 1962, the second is a recent discovery. The authors believe that the funeral rite and the inventory of these sites are very similar. All inhumations were made in shallow sub-quadrangular pits, in a crouched position on the left side. The funeral rite and the inventory combine elements of the Pokrovskiy and the Potapovskiy cultural types, which makes the authors to suggest the origins of formation of the Zaymishche type sites here. Analogies revealed in the sites of the Pokrovskiy and Potapovskiy types date existence of Novo-Mordovo II and Stary Kuybyshev VI burial grounds to the period preceding the Srubnaya cultural-historical community, and overall can fit within 19th – 18th centuries BC.

  1. A small Bronze Age mining camp: La Loma de la Tejería (Albarracín, Teruel

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    Montero Ruiz, Ignacio

    2008-06-01

    Full Text Available This paper shows the research done at Loma de la Tejería (Albarracín, Teruel where a seasonal camp site linked to a mining-metallurgical works has been discovered. Studies on materials show the use of different geological resources: copper minerals, Keuper clays with “Jacintos de Compostela” and volcanic rocks. Pottery residual analysis has documented dairy milky products and alcoholic drinks. Chronologically the site is classified amongst Chalcolithic and Early Bronze Age, on the presence of Bell Beaker pottery.

    Se presentan los datos de las excavaciones realizadas en la Loma de la Tejería (Albarracín, Teruel en la que se documenta un campamento estacional vinculado a tareas minero-metalúrgicas de pequeña escala. Los estudios realizados sobre el material indican el aprovechamiento de los recursos geológicos locales tanto de mineral de cobre, como de arcillas del Keuper con Jacintos de Compostela y rocas volcánicas. Los análisis de residuos han documentado en la cerámica productos lácteos y bebidas alcohólicas. Cronológicamente el yacimiento se encuadra en el Calcolítico y Bronce Antiguo, con presencia de cerámica campaniforme.

  2. Teoría de los marcos relacionales y la trasformación de las funciones del estímulo

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    Simon Dymond

    2005-01-01

    Full Text Available La teoría de los marcos de relaciones es una teoría y tecnología moderna del lenguaje y la cognición que hace gran énfasis en la trasformación de funciones de estímulo de acuerdo con las relaciones múltiples del estímulo. Revisamos la investigación reciente sobre la trasformación de las funciones de estímulo y argumentamos que la trasformación derivada posee importancia clínica, no solo porque da cuenta de la emergencia de nuevas respuestas ante estímulos previamente neutrales en ausencia de condicionamiento directo, sino porque también ayuda a explicar el desarrollo de nuevas estrategias de evitación y su rápida generalización. Posteriormente se delinean posibles restricciones sobre el efecto de la trasformación derivada por formas físicas del estímulo. En conclusión, el análisis básico y aplicado en curso del fenómeno de la trasformación de funciones representa uno de los más importantes desafíos y oportunidades para el análisis moderno de la conducta

  3. Los países del Este y la transición al mercado: hacia la formación del marco institucional

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    Luis Fernando Macias

    1994-01-01

    Full Text Available La transición al mercado ha sido para los países del Este de Europa el paso de la euforia inicial al desengaño generalizado. Las medidas adoptadas por los nuevos dirigentes con el propósito de reanimar la economía y sacarla de la crisis han conducido a lo contrario: la caída de la producción, la aparición del desempleo y el desplome del nivel de vida. Esta situación lleva al autor a través del artículo y a la luz de los acontecimientos recientes en la región, que han conducido a una modificación de las formas de propiedad dominantes existentes durante el período del socialismo real, a plantear la necesaria redefinición del marco socio-institucional que conduzca no sólo al desmonte del sistema centralista-burocrático de gestión, sino que se dirija también, y ésto es lo fundamental, al normal funcionamiento de una economía de mercado. Es esto último lo que el artículo se encarga de desglosar mientras explica, en ese nuevo contexto, los cambios que se deben realizar tanto en el factor humano corno en los sistemas legal y contable.

  4. Kaasaegse Kunsti Eesti Keskus kui kunstidiiler / Rael Artel, Kai Kaljo, Marco Laimre, Marge Monko ; intervjueerinud Reet Varblane

    Index Scriptorium Estoniae

    2010-01-01

    Vestlusringis osalenud vabakutseline kuraator Rael Artel, Tallinna Ülikooli dotsent, kunstnik Kai Kaljo, EKA fotoosakonna professor, kunstnik Marco Laimre ja EKA fotoosakonna dotsent, kunstnik Marge Monko arutavad, millist rolli peaks KKEK täitma praegu, 21. sajandi teisel kümnendil avatud maailma tingimustes

  5. THERMAP: the mid-infrared (8-16 µm) spectro-imager of the ESA Marco Polo R mission

    Science.gov (United States)

    Groussin, O.; Licandro, J.; Helbert, J.; Alí Lagoa, V.; Brageot, E.; Davidsson, B.; Delbó, M.; Delsanti, A.; Garcia-Talavera, M. R.; Green, S.; Jorda, L.; Knollenberg, J.; Kührt, E.; Lamy, P.; Lellouch, E.; Levacher, P.; Reynaud, J.-L.; Rozitis, B.; Sunshine, J.; Vernazza, P.

    2013-09-01

    THERMAP is a mid-infrared (8-16 μm) spectroimager, selected by the European Space Agency (ESA) in February 2013 for the scientific payload of the Marco Polo R M-class mission. We present in this paper the instrument and its scientific objectives.

  6. Japan's Future Plans for Missions to Primitive Bodies: Hayabusa-2, Hayabusa-Mk2, and Marco Polo

    Science.gov (United States)

    Yoshikawa, M.; Yano, H.; Kawaguchi, J.; Hayabusa-2 Pre-Project Team; Small Body Exploration Wg

    2008-03-01

    In Japan, we have studied about the future missions to primitive bodies in the solar system after Hayabusa mission. The new missions are called Hayabusa-2 and Hayabusa-Mk2. Hayabusa-Mk2 is now considered as Marco Polo with European researchers.

  7. Un marco de referencia de cinco dimensiones para la evaluación auténtica

    NARCIS (Netherlands)

    Gulikers, Judith; Bastiaens, Theo; Kirschner, Paul A.

    2011-01-01

    Gulikers, J. T. M., Bastiaens, Th. J., & Kirschner, P. A. (2010). Un marco de referencia de cinco dimensiones para la evaluación auténtica. (translation from English). Cuajimalpa, México: Aseguramiento de la Calidad en la Educacion y en el Trabajo.

  8. Kaasaegse Kunsti Eesti Keskus kui kunstidiiler / Rael Artel, Kai Kaljo, Marco Laimre, Marge Monko ; intervjueerinud Reet Varblane

    Index Scriptorium Estoniae

    2010-01-01

    23. augustini 2010 saab KKEK juhataja kohale kandideerida. Vestlusringis osalenud vabakutseline kuraator Rael Artel, Tallinna Ülikooli dotsent, kunstnik Kai Kaljo, EKA fotoosakonna professor, kunstnik Marco Laimre ja EKA fotoosakonna dotsent, kunstnik Marge Monko arutavad, millist rolli peaks KKEK täitma praegu, 21. sajandi teisel kümnendil avatud maailma tingimustes

  9. Anadarko's Marco Polo field: A RockMod success story[The Gulf of Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Contreras, Arturo; Torres-Verdin, Carlos

    2005-07-01

    The article describes the Marco Polo field development where the reservoir modelling system RockMod is used. The model combines geologic information with relevant sensitivity analysis techniques and pre-stack stochastic inversions. It was applied successfully and lead to substantially reduced development risk.

  10. El pintor Marco Tulio Salas Vega: Un símbolo de la lucha por el arte

    Directory of Open Access Journals (Sweden)

    Jorge Moreno Clavijo

    1967-09-01

    Full Text Available La muerte del pintor narmense Marco Tulio Salas Vega, ocurrida recientemente en Bogotá, por las circunstancias especiales que la rodearon, nos obliga a pensar, forzosamente, en el artista colombiano y su destino. Hablamos, claro está, del artista en general, no de las felices excepciones que, al fin y al cabo, vienen a confirmar la regla

  11. O ESPELHO VENENOSO DA NAÇÃO: NOTAS SOBRE BUDAPESTE

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    Antônio Marcos Sanseverino

    2015-01-01

    Full Text Available ResumoO presente ensaio parte da análise do final ambivalente de Budapeste, que aparenta uma dimensão poética que se revela artificial e falseadora. A partir desse indicativo, algumas marcas formais indiciam o uso irônico da forma própria ao romance autobiográfico.Por fim, esses traços são analisados como sedimentação formal da desagregação da experiênciano Brasil contemporâneo.Palavras-chaveChico Buarque; romance brasileiro; desagregação da experiência Antonio Marcos V. Sanseverino Professor Adjunto de Literatura Brasileirae do Programa de Pós-graduação em Letras da UFRGS. Autor datese Realismo e alegoria em Machado de Assis.

  12. The formyl peptide receptor like-1 and scavenger receptor MARCO are involved in glial cell activation in bacterial meningitis

    Directory of Open Access Journals (Sweden)

    Jansen Sandra

    2011-02-01

    Full Text Available Abstract Background Recent studies have suggested that the scavenger receptor MARCO (macrophage receptor with collagenous structure mediates activation of the immune response in bacterial infection of the central nervous system (CNS. The chemotactic G-protein-coupled receptor (GPCR formyl-peptide-receptor like-1 (FPRL1 plays an essential role in the inflammatory responses of host defence mechanisms and neurodegenerative disorders such as Alzheimer's disease (AD. Expression of the antimicrobial peptide cathelicidin CRAMP/LL-37 is up-regulated in bacterial meningitis, but the mechanisms underlying CRAMP expression are far from clear. Methods Using a rat meningitis model, we investigated the influence of MARCO and FPRL1 on rCRAMP (rat cathelin-related antimicrobial peptide expression after infection with bacterial supernatants of Streptococcus pneumoniae (SP and Neisseria meningitides (NM. Expression of FPRL1 and MARCO was analyzed by immunofluorescence and real-time RT-PCR in a rat meningitis model. Furthermore, we examined the receptor involvement by real-time RT-PCR, extracellular-signal regulated kinases 1/2 (ERK1/2 phosphorylation and cAMP level measurement in glial cells (astrocytes and microglia and transfected HEK293 cells using receptor deactivation by antagonists. Receptors were inhibited by small interference RNA and the consequences in NM- and SP-induced Camp (rCRAMP gene expression and signal transduction were determined. Results We show an NM-induced increase of MARCO expression by immunofluorescence and real-time RT-PCR in glial and meningeal cells. Receptor deactivation by antagonists and small interfering RNA (siRNA verified the importance of FPRL1 and MARCO for NM- and SP-induced Camp and interleukin-1β expression in glial cells. Furthermore, we demonstrated a functional interaction between FPRL1 and MARCO in NM-induced signalling by real-time RT-PCR, ERK1/2 phosphorylation and cAMP level measurement and show differences between

  13. CONSTRUINDO A IDENTIDADE MESSIÂNICA DE JESUS UMA LEITURA SÓCIO-SEMIÓTICA DE MARCOS 1,1 - 3,35

    Directory of Open Access Journals (Sweden)

    Júlio Paulo Tavares Zabatiero

    2006-01-01

    Full Text Available Este artigo oferece uma discussão dos processos semióticos de construção da identidade messiânica de Jesus no Evangelho de Marcos, capítulos 1 a 3. Inicia com uma breve discussão sobre o conceito de identidade e os processos de construção identitária, e perspectiva semiótica. A seguir, discute-se a obra “Evangelho de Marcos” enquanto expressão significativa da construção da identidade de Jesus pelo autor e sua comunidade. Passa-se à análise semiótica do texto marcano. Três são as características marcantes da identidade messiânica de Jesus no Evangelho: a filialdade de Jesus e sua correspondente fidelidade ao Pai que o enviou; a solidariedade do Messias Jesus com as pessoas impuras e pecadoras e a oposição de Jesus à identidade legitimadora do Judaísmo de seu tempo. A conclusão aponta para as diferenças e pontos de contato entre a metodologia semiótica e a exegese histórico-crítica. ABSTRACT: This article offers a discussion about the semiotic processes of the messianic identity of Jesus Christ in the Gospel of Mark, chapters 1 to 3. It starts with a brief description of the concept of identity and the aspects of the semiotic methodology used in the article to analyze the procedures of the identity elaboration. After that, it comments on the significance of the “Gospel of Mark”, as literary work, in the historical processes of designing the messianic identity of Jesus. The central part of the article offers a semiotic analysis of the initial chapters of the Gospel. There are three characteristics that shape the messianic identity of Jesus in the gospel: his condition as son of God and its consequent loyalty to his Father; Jesus’ solidarity to the impure and sinful people of his time, and his opposition to the legitimating identity of contemporary Jewish religion. It concludes with some brief methodological remarks on differences and similarities between semiotics and historical critical exegesis.

  14. Implicaciones del marco teórico de lo imaginario en la Psicología Social

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    Teresa Aracena Vicente

    2015-03-01

    Full Text Available En el presente estudio abordaremos dos de las principales concepciones sobre los mecanismos implicados en la construcción significativa del mundo. Hablamos de la Teoría de las Representaciones Sociales (TRS, formulada desde la psicología, y del marco teórico de lo imaginario, formulado principalmente desde la antropología y la filosofía. Procederemos exponiendo, primero, la TRS y, posteriormente, los acercamientos al marco teórico de lo imaginario desde diferentes disciplinas, para señalar las aportaciones que ofrece este último a la psicología social, aportaciones éstas que complementan las de la TRS. Así, este estudio tiene como objetivos realizar un análisis teórico de la TRS y del marco teórico de lo imaginario y especificar las contribuciones e implicaciones del marco teórico de lo imaginario a la psicología social (y, más concretamente, a la psicología cultural de modo a observar cómo el concepto de imaginario social incluye y trasciende al de representación social(RS. Consideraremos las implicaciones ontológicas, epistemológicas, metodológicas y para la salud de la utilización del marco teórico de lo imaginario en la psicología cultural. En este sentido, propondremos la adopción de dicho concepto por la psicología, considerando que el mismo es fundamental por su capacidad explicativa, comprensiva, interpretativa y crítica.

  15. Marcos da história da radioatividade e tendências atuais Landmarks in the history of radioactivity and current tendencies

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    Allan Moreira Xavier

    2007-02-01

    Full Text Available The first days of radioactivity, the discoveries of X-rays, radioactivity, of alpha- and beta- particles and gamma- radiation, of new radioactive elements, of artificial radioactivity, the neutron and positron and nuclear fission are reviewed as well as several adverse historical marks, such as the Manhattan project and some nuclear and radiological accidents. Nuclear energy generation in Brazil and the world, as an alternative to minimize environmental problems, is discussed, as are the medicinal, industrial and food applications of ionizing radiation. The text leads the reader to reflect on the subject and to consider its various aspects with scientific and technological maturity.

  16. Representa??es sociais da dengue: aproxima??es e afastamentos entre o discurso da comunidade e da m?dia impressa.

    OpenAIRE

    Milani, Miriam Ross

    2012-01-01

    Objetivou-se apreender as representa??es sociais (RS) da dengue elaboradas por moradores de uma zona urbana de risco e das not?cias veiculadas pela m?dia impressa. Utilizou-se a Teoria das Representa??es Sociais como aporte te?rico. A tese foi dividida em duas partes (i) marco te?rico e (ii) estudos emp?ricos: uma pesquisa de campo e outra documental. O primeiro estudo contou com 563 participantes, dos quais 263 s?o estudantes do Ensino M?dio, a maioria do sexo masculino (56%), com idades e...

  17. The fallacy of "equal treatment" in Brazil's bill of rights for internet users A falácia da "igualdade de tratamento" na carta brasileira de direitos dos usuários da internet

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    J. Gregory Sidak

    2012-12-01

    Full Text Available The "Brazilian bill of rights for internet users," or "marco civil," has been under consideration at the brazilian congress since 2011. Marco civil's provisions for network neutrality have been particularly controversial. Proponents of network neutrality in Brazil advocate for the "equal treatment" of all data packets, including banning internet service providers from offering to content providers the option to purchase enhanced quality of service in the delivery of data packets. These network neutrality rules conflict with the other goals and principles of marco civil-particularly goals to promote internet access, to foster innovation, and to protect the constitutional right of freedom of speech and the free flow of information.A "carta Brasileira de direitos dos usuários da internet," ou "marco civil," tramita no congresso Brasileiro desde 2011. As disposições do marco civil relativas à neutralidade de rede são particularmente controversas. Os defensores da neutralidade de rede no Brasil advogam pela "igualdade de tratamento" de todos os pacotes de dados, inclusive proibindo que provedores de serviço de acesso à internet ofereçam aos provedores de conteúdo a opção de adquirir uma melhor qualidade de serviço na entrega de pacotes de dados. Essas disposições relativas à neutralidade de rede conflitam com outros objetivos e princípios do marco civil - especialmente os objetivos de promover o acesso à internet, promover a inovação, e garantir o direito constitucional de liberdade de expressão e informação.

  18. BIM SYSTEM FOR THE CONSERVATION AND PRESERVATION OF THE MOSAICS OF SAN MARCO IN VENICE

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    F. Fassi

    2017-08-01

    Full Text Available The Basilica of San Marco in Venice is a well-known masterpiece of World Heritage. It is a real multi-faceted architecture. The management of the church and its construction site is very complicated, and requires an efficient system to collect and manage different kinds of data. The BIM approach appeared to be the most suitable to collect multi-source data, to monitor activities and guarantee the well-timed operations inside the church. The purpose of this research was to build a BIM of the Basilica, considering all aspects that characterize it and that require particular care. Many problems affected the phase of the acquisition of data, and forced the team to establish a clear working pipeline that allowed the survey simultaneously, hand in hand, with all the usual activities of the church. The fundamental principle for the organization of the whole work was the subdivision of the entire complex in smaller parts, which could be managed independently, both in the acquisition and the modelling stage. This subdivision also reflects the method used for the photogrammetric acquisition. The complexity of some elements, as capitals and statues, was acquired with different Level of Detail (LoD using various photogrammetric acquisitions: from the most general ones to describe the space, to the most detailed one 1:1 scale renderings. In this way, different LoD point clouds correspond to different areas or details. As evident, this pipeline allows to work in a more efficient way during the survey stage, but it involves more difficulties in the modelling stage. Because of the complexity of the church and the presence of sculptural elements represented by a mesh, from the beginning the problem of the amount of data was evident: it is nonsense to manage all models in a single file. The challenging aspect of the research job was the precise requirement of the Procuratoria di San Marco: to obtain the 1:1 representation of all the mosaics of the Basilica. This

  19. Bim System for the Conservation and Preservation of the Mosaics of San Marco in Venice

    Science.gov (United States)

    Fassi, F.; Fregonese, L.; Adami, A.; Rechichi, F.

    2017-08-01

    The Basilica of San Marco in Venice is a well-known masterpiece of World Heritage. It is a real multi-faceted architecture. The management of the church and its construction site is very complicated, and requires an efficient system to collect and manage different kinds of data. The BIM approach appeared to be the most suitable to collect multi-source data, to monitor activities and guarantee the well-timed operations inside the church. The purpose of this research was to build a BIM of the Basilica, considering all aspects that characterize it and that require particular care. Many problems affected the phase of the acquisition of data, and forced the team to establish a clear working pipeline that allowed the survey simultaneously, hand in hand, with all the usual activities of the church. The fundamental principle for the organization of the whole work was the subdivision of the entire complex in smaller parts, which could be managed independently, both in the acquisition and the modelling stage. This subdivision also reflects the method used for the photogrammetric acquisition. The complexity of some elements, as capitals and statues, was acquired with different Level of Detail (LoD) using various photogrammetric acquisitions: from the most general ones to describe the space, to the most detailed one 1:1 scale renderings. In this way, different LoD point clouds correspond to different areas or details. As evident, this pipeline allows to work in a more efficient way during the survey stage, but it involves more difficulties in the modelling stage. Because of the complexity of the church and the presence of sculptural elements represented by a mesh, from the beginning the problem of the amount of data was evident: it is nonsense to manage all models in a single file. The challenging aspect of the research job was the precise requirement of the Procuratoria di San Marco: to obtain the 1:1 representation of all the mosaics of the Basilica. This requirement

  20. Herschel observations of the Marco Polo-R asteroid 175706 (1996 FG3).

    Science.gov (United States)

    O'Rourke, L.; Barucci, A.; Gònzalez-Garcìa, B.; Dotto, E.; Küppers, M.

    2012-09-01

    Background: The Marco Polo-R mission has been selected for the assessment study phase of the ESA M3 missions. This ESA-led sample return mission to the binary asteroid 1996 FG3 (launch window between 2020 and 2024) is proposed with a design that allows it to fit within the pre-defined cost cap of a M-class mission. The binary nature of the target will allow more precise measurements of mass, gravity, and density than for a single object, as well as additional insights into the geology and geophysics of the system. The asteroid has been classified by Binzel et al. [1] as a C-type. It is considered to be a typical example of a primitive object [2]. Dynamically, this is an Apollo asteroid with semimajor axis a of 1.054 AU, eccentricity e of 0.35, and and inclination i of 1.98 degrees. Measurements of the albedo derived from thermal infrared observations give a value of pV = 0.042 (+0.035 -0.017), and a combined diameter of D = 1.84 (+0.56 -0.47) km [3]. The Herschel observations : The MACH-11 (Measurements of 11 Asteroids & Comets) Programme observed this binary asteroid in two occasions in November of 2012. The observations performed had a duration of 0.6 hours with the asteroid pair moving rapidly at 6'/hr thus making removal of the background quite straightforward. The observations were performed in two observing blocks; the first block consisted of a 2 repetition blue/red map, the second block consisted of a 2 repetition green/red map, with the intention to observe the target at different phase angles. Our Results : Our measurements will serve to update the known radiometric properties for this binary asteroid through their inclusion into a thermophysical model (TPM) [4] which has been validated against a large database of asteroids including targets of other spacecraft mission e.g. Lutetia [5], Itokawa [6]. Using existing sets of published thermal observations (Spitzer, TNG NICS), combined with our Herschel observations, applied within this thermophysical model