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Design of the implant fixture mount and clinical complications
González-González Jesús M. 대한치과이식(임프란트)학회 2021 The Korean Academy of Implant Dentistry Vol.40 No.1
Implants in the maxilla can cause various complications. The design of the implant fixture mount has not been previously considered as a possible cause of complications. This report presents the case of a 69-year-old man, who visited his dentist in September 2020 for oral rehabilitation due to the absence of teeth in his maxilla. A Galimplant IPX 4×8 implant was placed in position 17. Primary stability was achieved, close to the sinus but without invading it. However, when the fixture mount was removed from the implant, it was not released. A lateral movement made to release it caused the implant to lose its stability. The fixture mount could be removed, but the implant was already displaced into the maxillary sinus. The complication occurred due to the difficulty in separating the fixture mount from the implant. In this situation, the dentist had to apply a lateral force to separate the mount and this caused a loss of stability of the implant. I point out that a possible cause of the described complication could be the conical design of the fixture mount of Galimplant implant. The excessive adjustment necessitated by this mount design causes difficulties in separating it from the implant once it is inserted into the bone. This, therefore, reduces the feasibility of using this type of implant in areas with low bone density.
González-Rivadeneira Tania I.,Casas Alejandro,Argueta-Villamar Arturo 한국식품연구원 2022 Journal of Ethnic Foods Vol.9 No.-
This study aims to analyze the relationships between culture and nature associated with food sovereignty of the P'urhépecha people of Michoacán, central Mexico. We explore how food sovereignty could be analyzed by decentering humans. Firstly, we examine the context and meaning of food sovereignty based on information on the P'urhépecha culture, its history and food patterns. Then, we discuss the concept of food sovereignty from three perspectives: (1) How food sovereignty could be understood by decentering humans; (2) How to define food sovereignty from a relational perspective; and (3) How to do justice to an ontological plurality that involves non-human organisms. We conclude the need of considering new ways to understand food sovereignty, emphasizing the relational perspectives that include non-human entities.
Influence of Human Factor in the AACMM Performance: a New Evaluation Methodology
González-Madruga Daniel,Cuesta Eduardo,Barreiro Joaquín,Martínez-Pellitero Susana 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.
One of the main principles of metrology, when talking about instrument calibration, concern to the idea of reproducing the actualmeasurement process during calibration (same instrument handling, environment, measurement parameters, etc.) in order to obtainsuitable information. In spite of that, this principle is being currently neglected in Articulated Arm Coordinate Measuring Machine(AACMM) evaluation and/or calibration procedures. These procedures are carried out in manufacturer facilities under unknownconditions and measurement parameters instead of “in-situ” procedures with similar measurement parameters. Thereby, reportedaccuracy has little to do with AACMM common use and, therefore, with its reliability. This work presents a new evaluationmethodology for both AACMM and operator performance. To do so, a survey of main measurement parameters (operator, contactforce, type of feature) is carried out by mean of contact force sensor on the AACMM probe and geometric gauges. ANOVA have beenused for the study of these parameters and its impact on AACMM performance. Additionally, a new evaluation methodology capableof quantifying AACMM, operator and its measuring technique contribution to measurement uncertainty has been developed. It issupported by a feature-base gauge that has been specifically designed for this task.
Work Ability Index: Psychometric Testing in Aeronautical Industry Workers
González-Domínguez María Eugenia,Fernández-García Elena,Paloma-Castro Olga,González-López Regina María,Rivas Pérez María Paz,López-Molina Luis,García-Jiménez Jesús,Romero-Sánchez José Manuel 한국산업안전보건공단 산업안전보건연구원 2024 Safety and health at work Vol.15 No.1
Background The Work Ability Index (WAI) is an instrument that measures work ability. The wide dispersion of the WAI internationally has led to its adaptation for use in different countries. This study aimed to evaluate the psychometric properties of the Spanish version of the WAI. Methods A methodological design was used over an opportunistic sample of 233 workers in the aeronautical industry in Spain. Reliability was evaluated through internal consistency. Factorial validity, known groups, and convergent validity were tested. Results The Cronbach's alpha and item-total correlation indicated an adequate internal consistency. The confirmatory factor analysis, performed to evaluate the factorial validity, found adequate fit indices for a two-factor solution with a high correlation between the factors. Factor 1, “Subjectively estimated work ability and resources”, was composed of 3 subscales and factor 2, “Ill-health-related”, of 2 subscales. Subscales 4 and 6 had loading in both factors. Workers under 45 years of age obtained higher significant scores than older ones. Convergent validity was also evidenced since WAI was highly correlated with self-assessment of health status. Conclusions The Spanish version of the WAI has shown evidence of reliability and validity in this study, supporting its use in individual and collective health surveillance by occupational health professionals. The factorial solution that was found has previously been reported in another international context. However, further research is needed to resolve the discrepancies detected in the role of some subscales between other national and international studies. Background The Work Ability Index (WAI) is an instrument that measures work ability. The wide dispersion of the WAI internationally has led to its adaptation for use in different countries. This study aimed to evaluate the psychometric properties of the Spanish version of the WAI. Methods A methodological design was used over an opportunistic sample of 233 workers in the aeronautical industry in Spain. Reliability was evaluated through internal consistency. Factorial validity, known groups, and convergent validity were tested. Results The Cronbach's alpha and item-total correlation indicated an adequate internal consistency. The confirmatory factor analysis, performed to evaluate the factorial validity, found adequate fit indices for a two-factor solution with a high correlation between the factors. Factor 1, “Subjectively estimated work ability and resources”, was composed of 3 subscales and factor 2, “Ill-health-related”, of 2 subscales. Subscales 4 and 6 had loading in both factors. Workers under 45 years of age obtained higher significant scores than older ones. Convergent validity was also evidenced since WAI was highly correlated with self-assessment of health status. Conclusions The Spanish version of the WAI has shown evidence of reliability and validity in this study, supporting its use in individual and collective health surveillance by occupational health professionals. The factorial solution that was found has previously been reported in another international context. However, further research is needed to resolve the discrepancies detected in the role of some subscales between other national and international studies.
Gonzá,lez, José,A.,Lee, Yeon-Seung,Park, K.C. North-Holland Pub. Co 2017 Computer methods in applied mechanics and engineer Vol.319 No.-
<P><B>Abstract</B></P> <P>A mixed displacement–pressure formulation of the Stokes problem for incompressible fluids with free surfaces is developed for modeling the propagation of gravity waves in liquids and their interaction with structures using a Lagrangian approach. We assume that fluid displacements are small, making convective effects negligible and approximate the fluid velocities from the time derivative of the displacements. The resulting finite element equations are discretized with equal order for both displacement and pressure terms, together with employing stabilization techniques that circumvent the <I>inf–sup</I> requirements. The stability and accuracy of the methodology is finally demonstrated by solving some classical problems of hydrodynamics with free surfaces, comparing the results with known analytical solutions.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Stabilized formulation for hydrodynamic analysis of incompressible fluids with free surfaces. </LI> <LI> Classical stabilization applied to displacement–pressure formulation of hydrodynamics. </LI> <LI> The elimination of spurious in-plane circulation modes is investigated. </LI> <LI> Effective time integration of the equations using the Generalized-alpha algorithm. </LI> <LI> Stability and accuracy demonstrated by solving classical problems of hydrodynamics. </LI> </UL> </P>
Imaging Diagnosis of Perianal Leiomyoma: A Case Report
Enrique González-Díaz,Blanca García Cengotitabengoa,Ana Belen Dominguez Carbajo,Camino Fernández Fernández,A. Fernández Corona 대한대장항문학회 2021 Annals of Coloproctolgy Vol.37 No.S
A leiomyoma is a benign mesenchymal neoplasm that usually develops where smooth muscle is present. In this report, we present the case of a 75-year-old woman who sought medical attention due to pelvic organ prolapse and urinary incontinence, and without defecatory symptoms. Both pelvic floor ultrasound and magnetic resonance imaging (MRI) examination showed a well-defined mass in the ischioanal fossa, eventually diagnosed as a perianal leiomyoma. It is considered a rare entity because of its location involving the anal sphincter and clinical features. We describe the ultrasonographic and MRI findings of this perianal leiomyoma, together with differential diagnoses and immunohistochemical characterization.