The human ankle is a complex joint, most commonly represented as the talocrural and subtalar axes. It is troublesome to take in vivo measurements of the ankle joint. There are no instruments for patients lying on flat surfaces; employed in outdoor or remote sites. We have developed a “Turmell-meter” to address these issues. It started with the study of ankle anatomy and anthropometry. We also use the product of exponentials’ formula to visualize the movements. We built a prototype using human proportions and statistics. For pose estimation, we used a trilateration method by applying tetrahedral geometry. We computed the axis direction by fitting circles in 3D, plotting the manifold and chart as an ankle joint model. We presented the results of simulations, a prototype comprising 45 parts, specifically designed draw-wire sensors, and electronics. Finally, we tested the device by capturing positions and fitting them into the bi-axial ankle model as a Riemannian manifold. The Turmell-meter is a hardware platform for human ankle joint axes estimation. The measurement accuracy and precision depend on the sensor quality; we address this issue by designing an electronics capture circuit, measuring the real measurement with a Vernier caliper. Then, we adjust the analog voltages and filter the 10-bit digital value. The Technology Readiness Level is 2. The proposed ankle joint model has the properties of a chart in a geometric manifold, and we provided the details.
This work presents a device for the ankle kinematics study. It is portable, affordable and some parts can be 3D printed. It is based on the ankle anatomy and biomechanics, also, it can be applied for the characterization of the ankle axis or another models of the ankle. <br>
This work presents a device for the ankle kinematics study. It is portable, affordable and some parts can be 3D printed. It is based on the ankle anatomy and biomechanics, also, it can be applied for the characterization of the ankle axis or another models of the ankle. <br>
En los últimos años las universidades han elevado el número de estudiantes y programas académicos, lo cual exige optimizar sus recursos en tecnologías de la información con el fin de brindar cobertura y funcionalidad, permitiendo cumplir a estudiantes, profesores y administrativos sus funciones. Ante tal exigencia, se realizó un estudio sobre la Administración de Servicios de Tecnologías de la Información en la facultad de Ciencias Básicas e Ingeniería. Mediante el uso del ciclo Planear, Hacer, Verificar y Actuar, se definieron servicios, catálogos y SLA, se implementó OTRS como herramienta ITSM para el manejo de incidencias, permitiendo de esta manera controlar y mejorar la calidad de los servicios ofrecidos a la comunidad universitaria.
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