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Jorge Humberto Dias 강원대학교 인문과학연구소 2015 Journal of Humanities Therapy Vol.6 No.1
This text is the English translation of a resume we made to the doctoral thesis that we presented in February, 2013 at the New University of Lisbon in Portugal. We had also drawn up a structural adjustment, to make possible the publication of this text in the Journal. This is the first thesis developed in Portugal on the basis of a theory for philosophical counselling, based on the work of a Spanish philosopher, Julián Marías, and crossing a theme, happiness, regarded as the great purpose of life and of philosophical counselling. To read more information about the “PROJECT@” method (created by me) in more detail, we suggest the consultation of the bibliography and the footnotes. The innovative nature of our academic text and the fact that this is still only known in the Portuguese language, we consider very important the knowledge of the international community, so that we can open a wider debate as well as a enrichment of our research line.
Maiga M. Dias,Jorge L.P. Tamayo,Inácio B. Morsch,Armando M. Awruch 사단법인 한국계산역학회 2015 Computers and Concrete, An International Journal Vol.15 No.4
A finite element computer code for short-term analysis of steel-concrete composite structures is extended to study long-term effects under service loads, in the present work. Long-term effects are important in engineering design because they influence stress and strain distribution of the structural system and therefore contribute to the increment of deflections in these structures. For creep analysis, a rheological model based on a Kelvin chain, with elements placed in series, was employed. The parameters of the Kelvin chain were obtained using Dirichlet series. Creep and shrinkage models, proposed by the CEB FIP 90, were used. The shear-lag phenomenon that takes place at the concrete slab is usually neglected or not properly taken into account in the formulation of beam-column finite elements. Therefore, in this work, a three-dimensional numerical model based on the assemblage of shell finite elements for representing the steel beam and the concrete slab is used. Stud shear connectors are represented for special beam-column elements to simulate the partial interaction at the slab-beam interface. The two-dimensional representation of the concrete slab permits to capture the non-uniform shear stress distribution in the horizontal plane of the slab due to shear-lag phenomenon. The model is validated with experimental results of two full-scale continuous composite beams previously studied by other authors. Results are given in terms of displacements, bending moments and cracking patterns in order to shown the influence of long-term effects in the structural response and also the potentiality of the present numerical code.
Endoscopy Timing in Patients with Acute Upper Gastrointestinal Bleeding
Gonçalo Alexandrino,Tiago Dias Domingues,Rita Carvalho,Mariana Nuno Costa,Luís Carvalho Lourenço,Jorge Reis 대한소화기내시경학회 2019 Clinical Endoscopy Vol.52 No.1
Background/Aims: The role of very early (≤12 hours) endoscopy in nonvariceal upper gastrointestinal bleeding is controversial. We aimed to compare results of very early and early (12–24 hours) endoscopy in patients with upper gastrointestinal bleedingdemonstrating low-risk versus high-risk features and nonvariceal versus variceal bleeding. Methods: This retrospective study included patients with nonvariceal and variceal upper gastrointestinal bleeding. The primaryoutcome was a composite of inpatient death, rebleeding, or need for surgery or intensive care unit admission. Endoscopy timing wasdefined as very early and early. We performed the analysis in two subgroups: (1) high-risk vs. low-risk patients and (2) variceal vs. nonvariceal bleeding. Results: A total of 102 patients were included, of whom 59.8% underwent urgent endoscopy. Patients who underwent very earlyendoscopy received endoscopic therapy more frequently (p=0.001), but there was no improvement in other clinical outcomes. Furthermore, patients at low risk and with nonvariceal bleeding who underwent very early endoscopy had a higher risk of thecomposite outcome. Conclusions: Very early endoscopy does not seem to be associated with improved clinical outcomes and may lead to poorer outcomesin specific populations with upper gastrointestinal bleeding. The actual benefit of very early endoscopy remains controversial andshould be further clarified.
Adaptive Control for Robot Manipulators using Multiple Parameter Models
Shafiqul Islam,Peter X. Liu,Jorge Dias,Lakmal D. Seneviratne 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.5
In this paper, we propose multiple parameter models based adaptive switching control system for robotmanipulators. We first uniformly distribute the parameter set into a finite number of smaller compact subsets. Then,distributed candidate controllers are designed for each of these smaller compact subsets. Using Lyapunov inequality,a candidate controller is identified from the finite set of distributed candidate controllers that best estimates theplant at each instant of time. The design reduced the observer-controller gains by reducing modeling errors and uncertaintiesvia identifying an appropriate control/model via choosing largest guaranteed decrease in the value of theLyapunov function energy function. Compared with CE based CAC design, the proposed design requires smallerobserver-controller gains to ensure stability and tracking performance in the presence of large-scale modeling errorsand disturbance uncertainties. In contrast with existing adaptive method, multiple model based distributed hybriddesign can be used to reduce the energy consumption of the industrial robotic manipulator for large scale industrialautomation by reducing actuator input energy. Finally, the proposed hybrid adaptive control design is experimentallytested on a 3-DOF PhantomTM robot manipulator to demonstrate the theoretical development for real-timeapplications.
Akanksha Agrawal,Deepanshu Jain,Andre Dias,Vinicius Jorge,Vincent M. Figueredo 대한심장학회 2018 Korean Circulation Journal Vol.48 No.9
Background and Objectives Stress echocardiography is the current standard for cardiac risk stratification of patients undergoing orthotopic liver transplantation (OLT). We aim to evaluate the role of dobutamine stress echocardiography (DSE) in predicting perioperative major adverse cardiac event (MACE) in patients undergoing OLT. Methods This was a single-center retrospective study including 144 OLT patients. Of 144 patients, 118 had DSE. MACE included myocardial infarction (MI), heart failure (HF), cardiovascular and all-cause death 1 year after OLT. Results Our study cohort included 118 patients. The mean age was 57.3±8.2 years (range, 25–72 years). There were 85 men and 33 women, male to female ratio being 2.6:1. Of 118, 15 (13%) had positive DSE and 103 (87%) had negative DSE. Perioperative MACE incidence was 5.9% (95% confidence interval [CI], 2.6–12.3%). In predicting MACE, DSE had sensitivity of 5.6% (95% CI, 0.2–29.4%), specificity 86% (95% CI, 77.3–91.9%), positive predictive value 6.7% (95% CI, 0.3–33.4%), and negative predictive value (NPV) 83.5% (95% CI, 74.6–89.8%). Eighteen patients had MACE in first year post OLT (15%, 95% CI, 9.5–23.3%). Adverse events included cardiogenic shock (2/18), systolic HF (2/18), non-ST-elevated MI (7/18), cardiac mortality (3/18), and all-cause mortality (7/18). The overall complication rate of DSE was 17% (20/118). Conclusions In our cohort, DSE had a low sensitivity but high NPV in predicting perioperative MACE post OLT. A similar trend was noted for DSE in predicting 1-year MACE post OLT. We reiterate the need of a better screening and risk stratification tool for OLT.
Dongming Gan,Jian S Dai,Jorge Dias,Lakmal Seneviratne 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.10
This paper investigates various topologies and mobility of a class of metamorphic parallel mechanisms synthesized with reconfigurablerTPS limbs. Based on the reconfigurable Hooke (rT) joint, the rTPS limb has two phases which result in parallel mechanisms havingability of mobility change. While in one phase the limb has no constraint to the platform, in the other it constrains the spherical joint centerto lie on a plane which is used to demonstrate different topologies of the nrTPS metamorphic parallel mechanisms by investigatingvarious relations (parallel or intersecting) among the n constraint planes (n = 2,3,..,6). Geometric constraint equations of the platformrotation matrix and translation vector are set up based on the point-plane constraint, which reveals mobility and redundant geometricconditions of the mechanism topologies. By altering the limbs into the non-constraint phase without constraint plane, new mechanismphases are deduced with mobility change based on each mechanism topology.
Maria Joao Ponces,Jose Pedro Tavares,Jorge Dias Lopes,Afonso Pinhao Ferreira 대한치과교정학회 2014 대한치과교정학회지 Vol.44 No.6
Objective: Facial-type?associated variations in diagnostic features have several implications in orthodontics. For example, in hyperdivergent craniofacial types, growth imbalances are compensated by displacement of the condyle. When diagnosis and treatment planning involves centric relation (CR), detailed knowledge of the condylar position is desirable. The present study aimed to measure condylar displacement (CD) between CR and maximum intercuspation in three facial types of an asymptomatic orthodontic population. Methods: The study was conducted in 108 patients classified into three groups of 36 individuals each (27 women and 9 men; mean age, 20.5 years), based on the following facial patterns: hyperdivergent, hypodivergent, and intermediate. To quantify CD along the horizontal and vertical axes, the condylar position was analyzed using mounted casts on a semi-adjustable articulator and a mandibular position indicator. The Student t-test was used to compare CD between the groups. Results: Vertical displacement was found to be significantly different between the hyperdivergent and hypodivergent groups (p < 0.0002) and between the hyperdivergent and intermediate groups (p < 0.0006). The differences in horizontal displacement were not significant between the groups. In each group, vertical CD was more evident than horizontal displacement was. Conclusions: All facial types, especially the hyperdivergent type, carried a significantly high risk of CD. Therefore, the possibility of CD should be carefully evaluated and considered in the assessment of all orthodontic cases in order to accurately assess jaw relationships and avoid possible misdiagnosis.