Examinando por Materia "Stress"

Mostrando 1 - 15 de 15
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    Ansiedad, estrés y depresión en pacientes colombianos con aneurismas intracraneales no rotas
    (Universidad Eafit, 2020) Larrea Cárdenas, Susana; Lemos Hoyos, Mariantonia
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    Biomechanics of the canine mandible during bone transport distraction osteogenesis
    (ASME, 2014-11-01) Zapata, Uriel; Dechow, Paul C.; Watanabe, Ikuya; Elsalanty, Mohammed E.; Opperman, Lynne A.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Bioingeniería GIB (CES – EAFIT)
    This study compared biomechanical patterns between finite element models (FEMs) and a fresh dog mandible tested under molar and incisal physiological loads in order to clarify the effect of the bone transport distraction osteogenesis (BTDO) surgical process. Three FEMs of dog mandibles were built in order to evaluate the effects of BTDO. The first model evaluated the mandibular response under two physiological loads resembling bite processes. In the second model, a 5.0 cm bone defect was bridged with a bone transport reconstruction plate (BTRP). In the third model, new regenerated bony tissue was incorporated within the defect to mimic the surgical process without the presence of the device. Complementarily, a mandible of a male American foxhound dog was mechanically tested in the laboratory both in the presence and absence of a BTRP, and mechanical responses were measured by attaching rosettes to the bone surface of the mandible to validate the FEM predictions. The relationship between real and predicted values indicates that the stress patterns calculated using FEM are a valid predictor of the biomechanics of the BTDO procedures. The present study provides an interesting correlation between the stiffness of the device and the biomechanical response of the mandible affected for bone transport. Copyright © 2014 by ASME.
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    Biomechanics of the canine mandible during bone transport distraction osteogenesis
    (ASME, 2014-11-01) Zapata, Uriel; Dechow, Paul C.; Watanabe, Ikuya; Elsalanty, Mohammed E.; Opperman, Lynne A.; Zapata, Uriel; Dechow, Paul C.; Watanabe, Ikuya; Elsalanty, Mohammed E.; Opperman, Lynne A.; Universidad EAFIT. Departamento de Ingeniería de Producción; Materiales de Ingeniería
    This study compared biomechanical patterns between finite element models (FEMs) and a fresh dog mandible tested under molar and incisal physiological loads in order to clarify the effect of the bone transport distraction osteogenesis (BTDO) surgical process. Three FEMs of dog mandibles were built in order to evaluate the effects of BTDO. The first model evaluated the mandibular response under two physiological loads resembling bite processes. In the second model, a 5.0 cm bone defect was bridged with a bone transport reconstruction plate (BTRP). In the third model, new regenerated bony tissue was incorporated within the defect to mimic the surgical process without the presence of the device. Complementarily, a mandible of a male American foxhound dog was mechanically tested in the laboratory both in the presence and absence of a BTRP, and mechanical responses were measured by attaching rosettes to the bone surface of the mandible to validate the FEM predictions. The relationship between real and predicted values indicates that the stress patterns calculated using FEM are a valid predictor of the biomechanics of the BTDO procedures. The present study provides an interesting correlation between the stiffness of the device and the biomechanical response of the mandible affected for bone transport. Copyright © 2014 by ASME.
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    Depression levels following discharge predict quality of life in heart disease patients
    (Departamento de Psicologia, Universidade de Brasilia, 2019-01-01) Lemos M.; Román-Calderón J.P.; Rios P.C.; Torres S.; Agudelo D.M.; Lemos M.; Román-Calderón J.P.; Rios P.C.; Torres S.; Agudelo D.M.; Universidad EAFIT. Departamento de Humanidades; Estudios en Psicología
    Depression and stress have been related with poor Health Related Quality of Life (HRQoL) prognosis. However, it is not clear when these depressive symptoms should be measured. A sample of 177 Coronary Heart Disease patients were followed for 15 months aimed to compare the effect of depression and stress measure at time of hospitalization and three months later on the physical HRQoL trajectory. Linear growth models' results showed that depression and stress after discharge are negatively correlated with the physical HRQoL and depressive symptoms negatively affect the prognosis of these patients. © 2020 Universidade de Brasilia.
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    Depression levels following discharge predict quality of life in heart disease patients
    (Departamento de Psicologia, Universidade de Brasilia, 2019-01-01) Lemos M.; Román-Calderón J.P.; Rios P.C.; Torres S.; Agudelo D.M.
    Depression and stress have been related with poor Health Related Quality of Life (HRQoL) prognosis. However, it is not clear when these depressive symptoms should be measured. A sample of 177 Coronary Heart Disease patients were followed for 15 months aimed to compare the effect of depression and stress measure at time of hospitalization and three months later on the physical HRQoL trajectory. Linear growth models' results showed that depression and stress after discharge are negatively correlated with the physical HRQoL and depressive symptoms negatively affect the prognosis of these patients. © 2020 Universidade de Brasilia.
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    Design and construction of a transducer for bite force registration.
    (ELSEVIER SCI LTD, 2009-05-29) Isaza JF; Throckmorton GS; Roldán SI; Universidad EAFIT. Departamento de Ingeniería Mecánica; Bioingeniería GIB (CES – EAFIT)
    This study describes the development of a system for quantification of human biting forces by (1) determining the mechanical properties of an epoxy resin reinforced with carbon fiber, (2) establishing the transducer's optimal dimensions to accommodate teeth of various widths while minimizing transducer thickness, and (3) determining the optimal location of strain gages using a series of mechanical resistance and finite element (FE) analyses. The optimal strain gage location was defined as the position that produced the least difference in strain pattern when the load was applied by teeth with two different surface areas. The result is a 7.3-mm-thick transducer with a maximum load capacity beyond any expected maximum bite force (1500N). This system includes a graphic interface that easily allows acquisition and registration of bite force by any health-sciences or engineering professional.
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    Design and construction of a transducer for bite force registration.
    (ELSEVIER SCI LTD, 2009-05-29) Isaza JF; Throckmorton GS; Roldán SI; Universidad EAFIT. Departamento de Ingeniería de Diseño; Ingeniería de Diseño (GRID)
    This study describes the development of a system for quantification of human biting forces by (1) determining the mechanical properties of an epoxy resin reinforced with carbon fiber, (2) establishing the transducer's optimal dimensions to accommodate teeth of various widths while minimizing transducer thickness, and (3) determining the optimal location of strain gages using a series of mechanical resistance and finite element (FE) analyses. The optimal strain gage location was defined as the position that produced the least difference in strain pattern when the load was applied by teeth with two different surface areas. The result is a 7.3-mm-thick transducer with a maximum load capacity beyond any expected maximum bite force (1500N). This system includes a graphic interface that easily allows acquisition and registration of bite force by any health-sciences or engineering professional.
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    Efectos de la actividad física en el estrés laboral
    (Universidad EAFIT, 2020) Del Hierro, José; Nicholls, Alejandra; Villamizar Reyes, Milena Margarita
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    El estrés en las estudiantes de la Institución Educativa Santo Ángel : una descripción de la pandemia y el regreso a clase
    (Universidad EAFIT, 2022) Botero Ramírez, Mariana; Cuartas Arias, Jorge Mauricio
    General objective: to identify how the students at the Santo Angel high school perceived their mental and physical health, school and peers, and family relationships; given the isolation of the COVID-19 pandemic and the return to presential classes. Method: the analysis was carried out through a cross-sectional quantitative study, the research design is descriptive and was performed with the evaluation of Trianes et al. (2009), "the child stress assessment: inventory of daily stressors" (IIEC), this test was directed to girls between 8 and 14 years of age of the Santo Angel high school. Results: It was found that the perception of the students of Santo Angel regarding the pandemic and post-pandemic had variations, although these differences in their scores may indicate a correlation. We did not focus on using statistical tools that would allow us to affirm this, due to the type of study and the particular interest in the perception of the students, therefore, the content of the results yields data of an experiential nature, as to, how they felt and how they perceived the different situations that the questionnaire enunciated.
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    Gamers : un estudio exploratorio sobre el estrés y los síntomas de ansiedad y depresión
    (Universidad EAFIT, 2022) Rizo Acosta, José Henrique; Cuartas Arias, Jorge Mauricio
    Different studies have suggested marked problems of anxiety and depression in the population that frequently use video games, or are part of the "Gamer" culture. population that frequently uses video games, or that are part of the "Gamer" culture. The objective of this study is to identify if there is a relationship between the use of video games, anxiety and depression. anxiety and depression. This research used an online self-report methodology on 60 subjects from a community of gamers, in which scales of stress, anxiety, depression and personality traits were evaluated, depression and personality traits were assessed. The results show that a part of the gaming community suffers from a high level of stress, anxiety, depression and personality traits. Gamers suffer from mild to high levels of stress, anxiety and depression. The level of stress results showed that most of the time this group of people spend most of their time stressed. stressed. This research was able to conclude that there is a relationship between the level of stress with symptoms of anxiety and depression with people who belong to the Gamer community. So it would be crucial an intervention to this group of people to give them the knowledge about stress management and how to confront the symptoms of anxiety and depression.
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    Indentation damage and crack repair in human enamel.
    (ELSEVIER SCIENCE BV, 2013-05-01) Rivera C; Arola D; Ossa A; Rivera C; Arola D; Ossa A; Universidad EAFIT. Departamento de Ingeniería de Producción; Materiales de Ingeniería
    Tooth enamel is the hardest and most highly mineralized tissue in the human body. While there have been a number of studies aimed at understanding the hardness and crack growth resistance behavior of this tissue, no study has evaluated if cracks in this tissue undergo repair. In this investigation the crack repair characteristics of young human enamel were evaluated as a function of patient gender and as a function of the distance from the Dentin Enamel Junction (DEJ). Cracks were introduced via microindentation along the prism direction and evaluated as a function of time after the indentation. Microscopic observations indicated that the repair of cracks began immediately after crack initiation and reaches saturation after approximately 48 h. During this process he crack length decreased up to 10% of the initial length, and the largest degree of reduction occurred in the deep enamel, nearest the DEJ. In addition, it was found that the degree of repair was significantly greater in the enamel of female patients.
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    Intervención comportamental para mejorar funciones cognitivas y memoria de trabajo en los empleados del back - office en una empresa del sector BPO : reducción estrés y percepción de carga
    (Universidad EAFIT, 2024) Durango Salinas, Evelyn; Cuartas Arias, Jorge Mauricio
    Cognitive load and stress are problems constantly faced by human beings, whether for work, academic or personal reasons. Any situation that requires an effort of attention or concentration requires people to invest their cognitive resources. The objective of this study was to apply a behavioral intervention under the EAST framework and validate whether strengthening cognitive abilities and developing planning skills can modify the perception of mental workload and thus reduce the stress levels of back-office employees in a BPO company. This study was developed in 3 phases: Conceptualization, Intervention and effectiveness evaluation. The results showed that 89% of the employees indicated that the planning tools provided were useful to better plan their time and in relation to the perception of load, 82% indicated that it was easy to manage their daily workload. In relation to cognitive breaks, 83% of employees indicated that they were effective in improving productivity and managing their daily workload. Applying these strategies not only in work contexts can contribute significantly to improving productivity and finding a balance between work and personal life. It is recommended to continue researching and promoting these practices in organizations to manage employee health.
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    Mechanical properties of reinforcing steel used in Colombia
    (Universidad EAFIT, 2005-04-01) González Quintana, Victoria; Botero, Juan Carlos; Rochel, Roberto; Vidal, Julián; Alvarez Uribe, Martha Cecilia; Universidad EAFIT
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    Time dependent deformation behavior of dentin
    (PERGAMON-ELSEVIER SCIENCE LTD, 2017-04-01) Montoya C; Arola D; Ossa EA; Montoya C; Arola D; Ossa EA; Universidad EAFIT. Departamento de Ingeniería de Producción; Materiales de Ingeniería
    Objective The viscoelastic behavior of dentin and its ability to undergo time dependent deformation are considered to be important to oral functions and its capacity to resist fracture. There are spatial variations in the microstructure of dentin within the crown, which could be important to the viscous behavior. However, a spatially resolved description for the viscoelastic behavior of coronal dentin has not been reported. Methods In this investigation spherical indentations were made in three regions of coronal dentin including the outer, middle and inner regions. Power law relations were developed to quantitatively describe the stress-strain responses of the tissue. Results Results showed that the deformation behavior was strongly dependent on the composition (mineral to collagen ratio) and microstructure (tubule density), which contributed to an increase in the rate of viscous deformation with increasing proximity to the pulp. Conclusions A model accounting for spatial variations in composition and microstructure was developed to describe the steady-state time dependent deformation behavior of coronal dentin, and a good agreement was found with the experimental results. © 2017 Elsevier Ltd