South-South cooperation (SSC) suffers from little existing information about its operation, results, and effects on development. The purpose of this research is to contribute to the literature an approach to these aspects of the SSC from an analysis of Chile’s South-South Cooperation Policy, taking into account how far the theoretical approaches of SSC are applied on their normative and practical process as well as the results obtained in the process.
{"title":"Valorando la política de cooperación sur-sur. El caso de Chile hasta 2019","authors":"Analilia Huitrón","doi":"10.14201/ALH.23093","DOIUrl":"https://doi.org/10.14201/ALH.23093","url":null,"abstract":"South-South cooperation (SSC) suffers from little existing information about its operation, results, and effects on development. The purpose of this research is to contribute to the literature an approach to these aspects of the SSC from an analysis of Chile’s South-South Cooperation Policy, taking into account how far the theoretical approaches of SSC are applied on their normative and practical process as well as the results obtained in the process.","PeriodicalId":21206,"journal":{"name":"Revista De Metalurgia","volume":"1 1","pages":"1-23"},"PeriodicalIF":0.8,"publicationDate":"2021-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47409173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
El populismo comprende uno de los tópicos más recurrentes tanto en la discusión política como científico-social contemporánea. Utilizado de manera recurrente en forma peyorativa, este concepto ha suscitado vastas discusiones al interior de las Ciencias Sociales. Este artículo se propone realizar un recorrido por las conceptualizaciones del populismo en América Latina, buscando esclarecer su evolución teórica y su tenaz actualidad en la región.
{"title":"El populismo o los populismos. Actualidad y particularidades del concepto en América Latina","authors":"Sabrina Morán","doi":"10.14201/ALH.22677","DOIUrl":"https://doi.org/10.14201/ALH.22677","url":null,"abstract":"El populismo comprende uno de los tópicos más recurrentes tanto en la discusión política como científico-social contemporánea. Utilizado de manera recurrente en forma peyorativa, este concepto ha suscitado vastas discusiones al interior de las Ciencias Sociales. Este artículo se propone realizar un recorrido por las conceptualizaciones del populismo en América Latina, buscando esclarecer su evolución teórica y su tenaz actualidad en la región.","PeriodicalId":21206,"journal":{"name":"Revista De Metalurgia","volume":"1 1","pages":"1-16"},"PeriodicalIF":0.8,"publicationDate":"2021-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41656687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-26DOI: 10.14201/SHHME2020382221238
E. Greif
La empresa de construcción y puesta en marcha del hospital de San Juan de Jerusalén expresaba la enorme capacidad de concentración de recursos, así como el protagonismo en la atención médica que poseían los hermanos hospitalarios dentro del Reino Latino de Jerusalén. Sin embargo, y pese a su importancia, se ha discutido el grado de desarrollo médico que la institución efectivamente alcanzó y si los servicios que ofrecía tendían al simple cuidado y hospedaje de personas convalecientes o a la curación de pacientes enfermos. En este trabajo proponemos una relectura de un conjunto diverso de documentos que describen la tarea desplegada por la orden para, de esta manera, lograr una mejor comprensión del carácter específico de esta institución.
{"title":"Los pacientes del Hospital de San Juan de Dios en el Reino Latino de Jerusalén","authors":"E. Greif","doi":"10.14201/SHHME2020382221238","DOIUrl":"https://doi.org/10.14201/SHHME2020382221238","url":null,"abstract":"La empresa de construcción y puesta en marcha del hospital de San Juan de Jerusalén expresaba la enorme capacidad de concentración de recursos, así como el protagonismo en la atención médica que poseían los hermanos hospitalarios dentro del Reino Latino de Jerusalén. Sin embargo, y pese a su importancia, se ha discutido el grado de desarrollo médico que la institución efectivamente alcanzó y si los servicios que ofrecía tendían al simple cuidado y hospedaje de personas convalecientes o a la curación de pacientes enfermos. En este trabajo proponemos una relectura de un conjunto diverso de documentos que describen la tarea desplegada por la orden para, de esta manera, lograr una mejor comprensión del carácter específico de esta institución.","PeriodicalId":21206,"journal":{"name":"Revista De Metalurgia","volume":"38 1","pages":"221-238"},"PeriodicalIF":0.8,"publicationDate":"2021-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45270836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mohammad Mehdi Barjesteh, Seyed Mehdi Abbasi, Karim Zangeneh Madar, Kourosh Shirvani
Ni-based superalloy Rene®80 is used for manufacturing gas turbine blades in jet engines. The lifetime of some jet engine turbine blades is limited by low cycle fatigue and this property has been strongly affected by coatings. Ductile to Brittle Transition Temperature (DBTT) is the most important factor which affects the mechanical properties of coated alloys. In this study, high temperature-low cycle fatigue behavior of uncoated and coated Rene®80 by platinum-aluminide (Pt-Al) was evaluated at temperatures 871 °C (near the DBTT) and 982 °C (above the DBTT). Results of low cycle fatigue tests under strain-controlled condition at 871 °C for R =0 and strain rate of 2×10-3 s-1, at a total strain range of 0.8% showed a decrease in fatigue strength of coated specimens about 14%, compared to the uncoated ones. However, increasing the testing temperature from 871 °C to 982 °C, led to an increase in the low cycle fatigue behavior of coated Rene®80 about 10% as compared to the uncoated specimens.
{"title":"Comportamiento a fatiga de baja frecuencia del compuesto Rene®80 recubierto de aluminuro de platino cerca y por encima del DBTT","authors":"Mohammad Mehdi Barjesteh, Seyed Mehdi Abbasi, Karim Zangeneh Madar, Kourosh Shirvani","doi":"10.3989/REVMETALM.179","DOIUrl":"https://doi.org/10.3989/REVMETALM.179","url":null,"abstract":"Ni-based superalloy Rene®80 is used for manufacturing gas turbine blades in jet engines. The lifetime of some jet engine turbine blades is limited by low cycle fatigue and this property has been strongly affected by coatings. Ductile to Brittle Transition Temperature (DBTT) is the most important factor which affects the mechanical properties of coated alloys. In this study, high temperature-low cycle fatigue behavior of uncoated and coated Rene®80 by platinum-aluminide (Pt-Al) was evaluated at temperatures 871 °C (near the DBTT) and 982 °C (above the DBTT). Results of low cycle fatigue tests under strain-controlled condition at 871 °C for R =0 and strain rate of 2×10-3 s-1, at a total strain range of 0.8% showed a decrease in fatigue strength of coated specimens about 14%, compared to the uncoated ones. However, increasing the testing temperature from 871 °C to 982 °C, led to an increase in the low cycle fatigue behavior of coated Rene®80 about 10% as compared to the uncoated specimens.","PeriodicalId":21206,"journal":{"name":"Revista De Metalurgia","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45793618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The effect of Zn (0.95% wt.) and Ca (0.15% wt.) alloying elements on the general degradation mechanism of Mg was investigated in this work. Pure Mg and Mg-Zn-Ca alloy surfaces were characterized during their exposure to Hanks’ physiological solution (at 37 °C) for up to 7 days by SEM-EDS and XPS techniques. The layers formed on the alloy surface contained Ca10(PO4)6(OH)2, which may improve the bone compatibility. The intermetallic particles composed of Mg2Ca-phase, as well as the presence of Zn, promoted the formation of a more uniform protective layer. The EIS and electrochemical noise (EN) tests indicated that the polarization resistance (Rp) of pure Mg is one order of magnitude lower and the current noise resistance (Rn) ≈ 5 times, than those of Mg-Zn-Ca alloy. The pitting index (PI) values of each material were below 0.6, suggesting that the corrosion attack is not highly localized. At the end of the immersion tests, the concentration of Mg-ion released during degradation was ≈ 4.5 times higher for pure Mg (1.63 ± 0.02 mg·cm−2) than that of Mg-Zn-Ca (0.35 ± 0.03 mg·cm−2). Consequently, the calculated corrosion current density (jcorr) for pure Mg was two times higher (1.33 μA·cm−2) than that of ZX10 Mg-alloy (0.59 μA·cm−2).
{"title":"Evaluación electroquímica de la degradación de la aleación de Mg-Zn-Ca en la solución fisiológica de Hanks","authors":"G. Acosta, Emmanuel Mena-Morcillo, L. Veleva","doi":"10.3989/REVMETALM.181","DOIUrl":"https://doi.org/10.3989/REVMETALM.181","url":null,"abstract":"The effect of Zn (0.95% wt.) and Ca (0.15% wt.) alloying elements on the general degradation mechanism of Mg was investigated in this work. Pure Mg and Mg-Zn-Ca alloy surfaces were characterized during their exposure to Hanks’ physiological solution (at 37 °C) for up to 7 days by SEM-EDS and XPS techniques. The layers formed on the alloy surface contained Ca10(PO4)6(OH)2, which may improve the bone compatibility. The intermetallic particles composed of Mg2Ca-phase, as well as the presence of Zn, promoted the formation of a more uniform protective layer. The EIS and electrochemical noise (EN) tests indicated that the polarization resistance (Rp) of pure Mg is one order of magnitude lower and the current noise resistance (Rn) ≈ 5 times, than those of Mg-Zn-Ca alloy. The pitting index (PI) values of each material were below 0.6, suggesting that the corrosion attack is not highly localized. At the end of the immersion tests, the concentration of Mg-ion released during degradation was ≈ 4.5 times higher for pure Mg (1.63 ± 0.02 mg·cm−2) than that of Mg-Zn-Ca (0.35 ± 0.03 mg·cm−2). Consequently, the calculated corrosion current density (jcorr) for pure Mg was two times higher (1.33 μA·cm−2) than that of ZX10 Mg-alloy (0.59 μA·cm−2).","PeriodicalId":21206,"journal":{"name":"Revista De Metalurgia","volume":"56 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45418274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1007/978-3-030-63791-0_8
Chandrasekar Selvaraj, Srinivas B.T.V, H. Xiong
{"title":"Developing Trends in DNA Biosensor and Their Applications","authors":"Chandrasekar Selvaraj, Srinivas B.T.V, H. Xiong","doi":"10.1007/978-3-030-63791-0_8","DOIUrl":"https://doi.org/10.1007/978-3-030-63791-0_8","url":null,"abstract":"","PeriodicalId":21206,"journal":{"name":"Revista De Metalurgia","volume":"10 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87446036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1007/978-3-030-63791-0_2
Neethu T. M. Balakrishnan, Asha Paul, M. Krishnan, A. Das, Leya Rose Raphaez, Jou‐Hyeon Ahn, M. Fatima, R. Prasanth
{"title":"Lithium Iron Phosphate (LiFePO4) as High-Performance Cathode Material for Lithium Ion Batteries","authors":"Neethu T. M. Balakrishnan, Asha Paul, M. Krishnan, A. Das, Leya Rose Raphaez, Jou‐Hyeon Ahn, M. Fatima, R. Prasanth","doi":"10.1007/978-3-030-63791-0_2","DOIUrl":"https://doi.org/10.1007/978-3-030-63791-0_2","url":null,"abstract":"","PeriodicalId":21206,"journal":{"name":"Revista De Metalurgia","volume":"129 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76709790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1007/978-3-030-63791-0_9
R. Suresh, Claudio Sandoval, Eimmy Ramírez, K. Giribabu, R. Mangalaraja, J. Yáñez
{"title":"Electrochemical Sensors Based on Metal Oxide and Sulfide Nanostructures","authors":"R. Suresh, Claudio Sandoval, Eimmy Ramírez, K. Giribabu, R. Mangalaraja, J. Yáñez","doi":"10.1007/978-3-030-63791-0_9","DOIUrl":"https://doi.org/10.1007/978-3-030-63791-0_9","url":null,"abstract":"","PeriodicalId":21206,"journal":{"name":"Revista De Metalurgia","volume":"71 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74545158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1007/978-3-030-63791-0_4
Hasan Ay, F. Sen
{"title":"Metal, Metal Oxides, and Metal Sulfide Roles in Fuel Cell","authors":"Hasan Ay, F. Sen","doi":"10.1007/978-3-030-63791-0_4","DOIUrl":"https://doi.org/10.1007/978-3-030-63791-0_4","url":null,"abstract":"","PeriodicalId":21206,"journal":{"name":"Revista De Metalurgia","volume":"47 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74685405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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