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Fernando Alfonso 대한심장학회 2017 Korean Circulation Journal Vol.47 No.3
The International Committee of Medical Journal Editors (ICMJE) provides recommendations to improve the editorial standards and scientific quality of biomedical journals. These recommendations range from uniform technical requirements to more complex and elusive editorial issues including ethical aspects of the scientific process. Recently, registration of clinical trials, conflicts of interest disclosure, and new criteria for authorship -emphasizing the importance of responsibility and accountability-, have been proposed. This year a new editorial initiative to foster sharing of clinical trial data has been launched. This review discusses this novel initiative with the aim of increasing awareness among readers, investigators, authors and Editors of the Editors´ Network of the European Society of Cardiology.
Modified Disk-Shaped Compact Tension Test for Measuring Concrete Fracture Properties
Cifuentes, Hector,Lozano, Miguel,Holusova, Tana,Medina, Fernando,Seitl, Stanislav,Fernandez-Canteli, Alfonso Korea Concrete Institute 2017 International Journal of Concrete Structures and M Vol.11 No.2
A new approach for measuring the specific fracture energy of concrete denoted modified disk-shaped compact tension (MDCT) test is presented. The procedure is based on previous ideas regarding the use of compact tension specimens for studying the fracture behavior of concrete but implies significant modifications of the specimen morphology in order to avoid premature failures (such as the breakage of concrete around the pulling load holes). The manufacturing and test performance is improved and simplified, enhancing the reliability of the material characterization. MDCT specimens are particularly suitable when fracture properties of already casted concrete structures are required. To evaluate the applicability of the MDCT test to estimate the size-independent specific fracture energy of concrete ($G_F$),the interaction between the fracture process zone of concrete andthe boundary of theMDCTspecimens at the end of the test is properly analyzed. Further, the experimental results of $G_F$ obtained by MDCT tests for normal- and high-strength self-compacting concrete mixes are compared with those obtained using the well-established three-point bending test. The procedure proposed furnishes promising results, and the $G_F$ values obtained are reliable enough for the specimen size range studied in this work.
Modified Disk-Shaped Compact Tension Test for Measuring Concrete Fracture Properties
Hector Cifuentes,Miguel Lozano,Ta?a Holu?ova,Fernando Medina,Stanislav Seitl,Alfonso Ferna´ndez-Canteli 한국콘크리트학회 2017 International Journal of Concrete Structures and M Vol.11 No.2
A new approach for measuring the specific fracture energy of concrete denoted modified disk-shaped compact tension (MDCT) test is presented. The procedure is based on previous ideas regarding the use of compact tension specimens for studying the fracture behavior of concrete but implies significantmodifications of the specimen morphology in order to avoid premature failures (such as the breakage of concrete around the pulling load holes). The manufacturing and test performance is improved and simplified, enhancing the reliability of the material characterization. MDCTspecimens are particularly suitable when fracture properties of already casted concrete structures are required. To evaluate the applicability of theMDCT test to estimate the size-independent specific fracture energy of concrete (GF), the interaction between the fracture process zone of concrete and the boundary of theMDCTspecimens at the end of the test is properly analyzed. Further, the experimental results of GF obtained by MDCT tests for normal- and high-strength selfcompacting concrete mixes are compared with those obtained using the well-established three-point bending test. The procedure proposed furnishes promising results, and the GF values obtained are reliable enough for the specimen size range studied in this work.