BIOMECHANICAL ANALYSIS APPLIED TO THE EVALUATION OF POSTURE IN LAPAROSCOPIC SURGERY

Laparoscopic techniques allow less-invasive treatment of common surgical problems in the field of Sports Medicine and Orthopaedics. Laparoscopic instruments have been reported as being uncomfortable, leading to musculoskeletal disorders (pain, stiffness and numbness) during and after the work, due to the forced posture that surgeons have to adopt for long periods (Berguer, et al. 1999; 2001). These muscular disorders are work related (WRMSDs) because of the remote visualization of the surgical field and the deficient design of the laparoscopic instruments. Even if several studies have been developed to obtain information in this field, there is still lack of research findings concerning the surgical procedures developed in the "real world" of the operating room conditions. The main aim of this study in progress, is to establish objective criteria concerning the design and use of laparoscopic instruments using the Ergonomics methodology. Besides, research findings could support the training process of the surgeons. To this purpose there is a need for developing a feasible methodology to detect the presence of risk factors on the surgeons' health

ANALYSIS OF THE MUSCULAR INTERVENTION IN A BALLISTIC STRECHING EXERCISE BASED ON THE ANGULAR ACCELERATION AND EMG DATA

The aim of stretching exercises is to increase muscle-tendon flexibility which depends on neurogenic (stretch reflex), myogenic (viscoeiasticity of the musculo-tendinous structures) and joint constraints (Taylor et al. 1990; 1997). Among the other common techniques (passive, static and PNF) ballistic stretching is using the momentum of a moving body or a limb to force it beyond its normal range of motion. However, in spite of the exciting concerns of stretching neuromechanics, as well as, the overestimation of the role of connective tissue and the underestimation of the resistance of the muscles to stretch (Hutton, 1992), there is a lack of studies concerning the muscular activity in ballistic stretching. The main purpose of this study was to determine the intervention of the muscles quadriceps femoris (rectus femoris - vastus medialis) and biceps femoris and its relationship with the kinematics of the hip joint during a common ballistic stretching exercise

Experimental study of the free surface deformation due to thermal convection in liquid bridges

info:eu-repo/semantics/publishe

A new experimental technique for measuring the dynamical free surface deformation in liquid bridges due to thermal convection

info:eu-repo/semantics/publishe

Measurement of the dynamical free surface deformation in liquid bridges

info:eu-repo/semantics/publishe

Flow visualizations in a PDMS cerebral aneurysm biomodel

Cerebral aneurysm is an abnormal dilatation of the blood vessel which affects a high percentage of the worldwide population. One way to investigate this pathology is using in vivo techniques, but these types of experiments have a high cost and low reproducibility. Thus, to understand the local hemodynamics of brain aneurysms, it is imperative to manufacture in vitro models that simulate real brain aneurysms. These biomodels are suitable for experimental testing, as well as for evaluating and validating computational models. In this work, was manufactured a biomodel of a cerebral aneurysm made by polydimethylsiloxane (PDMS), combining rapid prototyping technology with a PDMS gravity casting process. Experimental flow visualizations were performed at different flow rates. The flow visualizations results have shown that there is a transition from laminar to turbulent flow for a flow rate near 6 ml/min. The proposed PDMS biomodels have shown the ability to perform flow visualizations and have the potential to help the development and validation of computational models.The authors acknowledge the financial support provided by Fundação para a Ciência e a Tecnologia (FCT), through the projects EXPL/EME-EME/0732/2021, PTDC/EEI- EEE/2846/2021, funded by NORTE 2020, PORTUGAL2020, and FEDER. This work was also supported by Fundação para a Ciência e a Tecnologia (FCT) under the strategic grants UIDB/04077/2020, UIDB/00690/2020, UIDB/04436/2020 and UIDB/00532/2020. Andrews Souza acknowledges the PhD scholarship 2021.07961.BD attributed by FCT. Partial support from the Junta de Extremadura through Grants No. GR21091 and IB20105 (partially financed by FEDER funds) is gratefully acknowledged.info:eu-repo/semantics/publishedVersio

Additive manufacturing techniques for the fabrication of intracranial aneurysm biomodels

The hemodynamics of intracranial aneurysm (IA) involves complex phenomena that influence its growth and rupture. The advancement of additive manufacturing techniques allowed the development of biomodels suitable for in vitro experimental tests. Thus, we present in this work the process of manufacturing flow biomodels, using different additive manufacturing techniques and materials. The biomodels obtained through these methods proved to be suitable for experiments using imaging techniques and for the validation of numerical studies.The authors acknowledge the financial support provided by Fundação para a Ciência e a Tecnologia (FCT), through the projects EXPL/EME-EME/0732/2021, PTDC/EEIEEE/ 2846/2021, funded by NORTE 2020, PORTUGAL2020, and FEDER. This work was also supported by Fundação para a Ciência e a Tecnologia (FCT) under the strategic grants UIDB/04077/2020, UIDB/00690/2020, UIDB/04436/2020 and UIDB/00532/2020. Andrews Souza acknowledges the PhD scholarship 2021.07961.BD attributed by FCT. Partial support from the Junta de Extremadura through Grants No. GR21091 and IB20105 (partially financed by FEDER funds) is gratefully acknowledgedinfo:eu-repo/semantics/publishedVersio

Dynamical response of liquid bridges to a step change in the mass force magnitude

We analyze the dynamical response of an isothermal liquid bridge to a step change in the mass force magnitude by numerically solving the three-dimensional Navier-Stokes equations. We study the free surface oscillations caused by both axial and lateral pulses of the mass force. The oscillation amplitude and the dynamical stability limit are calculated for different values of the parameters characterizing the fluid configuration. We examine the stability of one of the liquid bridges to be analyzed in the Japanese and European Research Experiment on Marangoni Instabilities experiment on board of the International Space Station (ISS). We study the response of that liquid bridge to real g-jitter on board of the ISS.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Subcritical and oscillatory dynamic surface deformations in non-cylindrical liquid bridges

SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Promoción de la Educación por la Paz

Se pretende fomentar el interés y el desarrollo de actividades en relación con la Educación para la Paz. Los objetivos son insistir en la formación en valores tanto en el profesorado como en el alumnado; crear un ámbito de trabajo y reflexión de la Educación para la Paz en el curriculum de las asignaturas y en el Proyecto Curricular. La metodología parte de la dinámica de grupo mediante la organización de sesiones donde se desarrollan temas relacionados con la Guerra, la Violencia, y la Paz. Las sesiones se preparan en grupos donde hay un coordinador del proyecto, algún profesor y varios alumnos-as, y se llevan a cabo durante una tarde por semana. La evaluación se realiza a partir de las exposiciones orales de los temas propuestos así como por la observación del grado de utilidad de los contenidos y la adaptación al grupo. La valoración es muy buena por el grado de interés y motivación suscitada entre el alumnado..Madrid (Comunidad Autónoma). Consejería de Educación y CulturaMadridMadrid (Comunidad Autónoma). Subdirección General de Formación del Profesorado. CRIF Las Acacias; General Ricardos 179 - 28025 Madrid; Tel. + 34915250893ES