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Computing the Refined Compression Field Theory
Hernandez-Diaz, A.M.,Garcia-Roman, M.D. Korea Concrete Institute 2016 International Journal of Concrete Structures and M Vol.10 No.2
In recent years, some modifications were introduced in the stress-strain relationship of the steel in order to develop a more efficient shear model for reinforced concrete members. The last contribution in this sense corresponding to the Refined Compression Field Theory (RCFT, 2009); this theory proposed a steel constitutive model that has account the tension stiffening area prescribed by technical codes, what simplifies all the design process. However, under certain design conditions supported by such codes, the RCFT model does not provide a real (non-complex) solution for the steel yield strain when the prescribed tension stiffening area is considered; then the load-strain response cannot be computed. In this technical note, the tension stiffening area is fixed in order to guarantee the application of the embedded steel constitutive model for all the standard design range.
Computing the Refined Compression Field Theory
A. M. Hernandez-Diaz,M. D. Garcia-Roman 한국콘크리트학회 2016 International Journal of Concrete Structures and M Vol.10 No.2
In recent years, some modifications were introduced in the stress–strain relationship of the steel in order to develop a more efficient shear model for reinforced concrete members. The last contribution in this sense corresponding to the Refined Compression Field Theory (RCFT, 2009); this theory proposed a steel constitutive model that has account the tension stiffening area prescribed by technical codes, what simplifies all the design process. However, under certain design conditions supported by such codes, the RCFT model does not provide a real (non-complex) solution for the steel yield strain when the prescribed tension stiffening area is considered; then the load-strain response cannot be computed. In this technical note, the tension stiffening area is fixed in order to guarantee the application of the embedded steel constitutive model for all the standard design range.
Advances in neoadjuvant therapy for resectable pancreatic cancer over the past two decades
Alvaro Gregorio Morales Taboad,Pablo Lozano Lominchar,Lorena Martin Roman,Pilar Garcia-Alfonso,Andres Jesus Munoz Martin,Jose Antonio Blanco Rodriguez,Jose Manuel Asencio Pascual 한국간담췌외과학회 2021 Annals of hepato-biliary-pancreatic surgery Vol.25 No.2
In the last two decades, pancreatic cancer has been undergoing important changes in its perioperative management due to the great interest in multidisciplinary management and preoperative multimodal therapy, which in numerous studies have shown promising clinical results. Although the standard of treatment for resectable pancreatic ductal adenocarcinoma (PDAC) today is surgery followed by adjuvant therapy, as it is a biologically aggressive disease, even with complete resection, it has high rates of local and distant relapse. Several retrospective and prospective phase I/II studies have opened the window for neoadjuvant therapy with chemotherapy (CT), chemoradiotherapy (CRT), or both, as an alternative treatment for resectable pancreatic cancer, with promising results. Neoadjuvant therapy could has some advantages, including early administration of systemic treatment, in vivo assessment of response to treatment, increase resectability rate in borderline patients, increase resection rate with negative margin and survival benefit. While it seems clear that even potentially resectable disease would benefit from preoperative multimodal therapy, the optimal neoadjuvant therapeutic strategy is still controversial and currently there are only recommendations for neoadjuvant treatment, in clinical guidelines such as the NCCN and ESMO, for borderline and/or locally advanced PDAC. This review provides an overview of recent studies available and how they relate to systemic treatment of resectable PDAC in the neoadjuvant setting.
Characterization and Classification of Soils in Mexicali Valley, Baja California, Mexico
Monica Aviles-Marin,Roberto Soto-Ortiz,Angel Lopez-Lopez,Victor Cardenas-Salazar,Angel Faz-Cano,Earl Alexander,Jesus Roman-Calleros,Isabel Escobosa-Garcia,Fernando Escobosa-Garcia 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6