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Flood Disaster Risk Simulation in Urban Areas in Chaclacayo district, Peru
Castillo Osorio, Ever Enrique,Yoo, Hwan Hee 대한공간정보학회 2018 대한공간정보학회지 Vol.26 No.2
Many urban areas are vulnerable to hazards produced by natural disasters specially floods that are currently increasing. For this reason, prevention efforts must focus on reducing disaster risks when they happen. These actions are applied to land areas; therefore the geographic data are valuable to improve them, because they give the spatial location of the elements in the terrain. Likewise, the hydrological simulation models provide a perspective of the possible vulnerable areas impacted by floods. In order to achieve the improvement of flood disaster risk prevention activities, we propose a methodology for the hydrological simulation of flood scenarios using HecRAS tool. In this methodology we define the geometrical conditions of the cartographic data, use Gumbel`s distribution method for the processing of hydrological data, and develop the hydrological simulation process applying geomorphological and fluid mechanics parameters. The results of the hydrological simulation and the cartographic data are stored in a flexible geodatabase designed by us, using standards and protocols based on open source, which allows their collection, processing and dissemination. We apply the proposed methodology to a case study and develop the hydrological modeling for three simulation scenarios, to calculate the flooding urban areas in Chaclacayo district located in Peru.
한반도의 통일이 가능할 것인가? -한반도의 국제 관계-
라우라오소리오고메즈 ( Osorio Gomez Laura ) 연세대학교 통일연구원 2015 통일연구 Vol.19 No.1
Since 1948, the inter- Korean relations have fluctuated. Initially, the reunification was sought through the use of force and absorption. Later, the recovery of confidence ruled the process. North Korea is more and more isolated and in imminent decadency. Events such as the collapse of the Soviet Union, the death of Juche’s founder, severe famines and the change of course of the historical allies, have deeply weakened the regime that will end in a collapse some day. Given the current situation in North Korea and the change of attitude of the South Korean government toward an improvement in their relationships with the North, it is possible to think in Korea’s coming reunification.
Duenas-Osorio, Leonardo,Park, Joonam,Towashiraporn, Peeranan,Goodno, Barry J.,Frost, David,Craig, James I.,Bostrom, Ann Techno-Press 2004 Structural Engineering and Mechanics, An Int'l Jou Vol.17 No.3
Consequence-Based Engineering (CBE) is a new paradigm proposed by the Mid-America Earthquake Center (MAE) to guide evaluation and rehabilitation of building structures and networks in areas of low probability - high consequence earthquakes such as the central region of the U.S. The principal objective of CBE is to minimize consequences by prescribing appropriate intervention procedures for a broad range of structures and systems, in consultation with key decision makers. One possible intervention option for rehabilitating unreinforced masonry (URM) buildings, widely used for essential facilities in Mid-America, is passive energy dissipation (PED). After the CBE process is described, its application in the rehabilitation of vulnerable URM building construction in Mid-America is illustrated through the use of PED devices attached to flexible timber floor diaphragms. It is shown that PED's can be applied to URM buildings in situations where floor diaphragm flexibility can be controlled to reduce both out-of-plane and in-plane wall responses and damage. Reductions as high as 48% in roof displacement and acceleration can be achieved as demonstrated in studies reported below.
Ríos-Osorio Néstor,Muñoz-Alvear Hernan Darío,Jiménez-Castellanos Fabio Andrés,Quijano-Guauque Sara,Jiménez-Peña Oscar,García-Perdomo Herney Andrés,Caviedes-Bucheli Javier 대한치과보존학회 2022 Restorative Dentistry & Endodontics Vol.47 No.3
Objectives This systematic review and meta-analysis aimed to assess the association of cigarette smoking with the prevalence of post-endodontic apical periodontitis in humans. Materials and Methods We searched through PubMed/Medline, Web of Science, and Scopus from inception to December 2020. Risk of bias was performed by using the Newcastle-Ottawa Scale for cross-sectional, cohort, and case-control studies. We performed the statistical analysis in Review Manager 5.3 (RevMan 5.3). Results 6 studies met the inclusion criteria for qualitative and quantitative synthesis. Statistical analysis of these studies suggests that there were no differences in the prevalence of post endodontic apical periodontitis (AP) when comparing non-smokers vs smoker subjects regarding patients (odds ratio [OR], 0.68; 95% confidence interval [CI], 0.31–1.49; I2 = 58%) and teeth (OR, 1.71; 95% CI, 0.99–2.93; I2 = 72%). Conclusions Our findings suggest that there was no association between cigarette smoking and post-endodontic apical periodontitis, as we did not find statistical differences in the prevalence of post-endodontic AP when comparing non-smokers vs smoker subjects. Therefore, smoking should not be considered a risk factor associated with endodontic failure. Objectives This systematic review and meta-analysis aimed to assess the association of cigarette smoking with the prevalence of post-endodontic apical periodontitis in humans. Materials and Methods We searched through PubMed/Medline, Web of Science, and Scopus from inception to December 2020. Risk of bias was performed by using the Newcastle-Ottawa Scale for cross-sectional, cohort, and case-control studies. We performed the statistical analysis in Review Manager 5.3 (RevMan 5.3). Results 6 studies met the inclusion criteria for qualitative and quantitative synthesis. Statistical analysis of these studies suggests that there were no differences in the prevalence of post endodontic apical periodontitis (AP) when comparing non-smokers vs smoker subjects regarding patients (odds ratio [OR], 0.68; 95% confidence interval [CI], 0.31–1.49; I2 = 58%) and teeth (OR, 1.71; 95% CI, 0.99–2.93; I2 = 72%). Conclusions Our findings suggest that there was no association between cigarette smoking and post-endodontic apical periodontitis, as we did not find statistical differences in the prevalence of post-endodontic AP when comparing non-smokers vs smoker subjects. Therefore, smoking should not be considered a risk factor associated with endodontic failure.
Ríos-Osorio Néstor,Quijano-Guauque Sara,Briñez-Rodríguez Sandra,Velasco-Flechas Gustavo,Muñoz-Solís Antonieta,Chávez Carlos,Fernandez-Grisales Rafael 대한치과보존학회 2024 Restorative Dentistry & Endodontics Vol.49 No.1
The implementation of imaging methods that enable sensitive and specific observation of anatomical structures has been a constant in the evolution of endodontic therapy. Cone-beam computed tomography (CBCT) enables 3-dimensional (3D) spatial anatomical navigation in the 3 volumetric planes (sagittal, coronal and axial) which translates into great accuracy for the identification of endodontic pathologies/conditions. CBCT interpretation consists of 2 main components: (i) the generation of specific tasks of the image and (ii) the subsequent interpretation report. A systematic and reproducible method to review CBCT scans can improve the accuracy of the interpretation process, translating into greater precision in terms of diagnosis and planning of endodontic clinical procedures. MEDLINE (PubMed), Web of Science, Google Scholar, Embase and Scopus were searched from inception to March 2023. This narrative review addresses the theoretical concepts, elements of interpretation and applications of the CBCT scan in endodontics. In addition, the contents and rationale for reporting 3D endodontic imaging are discussed.