The Multimodal Tutor: Adaptive Feedback from Multimodal Experiences

This doctoral thesis describes the journey of ideation, prototyping and empirical testing of the Multimodal Tutor, a system designed for providing digital feedback that supports psychomotor skills acquisition using learning and multimodal data capturing. The feedback is given in real-time with machine-driven assessment of the learner's task execution. The predictions are tailored by supervised machine learning models trained with human annotated samples. The main contributions of this thesis are: a literature survey on multimodal data for learning, a conceptual model (the Multimodal Learning Analytics Model), a technological framework (the Multimodal Pipeline), a data annotation tool (the Visual Inspection Tool) and a case study in Cardiopulmonary Resuscitation training (CPR Tutor). The CPR Tutor generates real-time, adaptive feedback using kinematic and myographic data and neural networks

First Aid Simulator

Cílem této bakalářské práce bylo vytvoření simulátoru kardiopulmonální resuscitace pro laiky. Simulátor byl realizován pro účely nácviku nepřímé srdeční masáže a umělé plicní ventilace. Nepřímá srdeční masáž byla realizována měřením zrychlení pomocí akcelerometru umístěného na komerčním zařízení CPR Simulator EVE-B (Hivista), který sloužil i jako etalon srovnání prováděné nepřímé srdeční masáže a měřených dat. Umělá plicní ventilace byla konstruována pomocí čidla objemového průtoku 281637 Flow Sensor (Hamilton Medical) doplněného o diferenciální snímač tlaku MPXV7002DP (NXP Semiconductors), který vstupuje do zobrazovací jednotky Labquest 2 (Vernier). Celý systém navrženého a komerčního srovnávacího řešení je vestavěn do sub realistického modelu plyšového medvěda s výškou cca 120 cm. Na dílčích částech kardiopulmonálního simulátoru byla provedena měření a kalibrace, stejně tak jako na celkově sestaveném simulátoru medvědoidního typu. Výsledky akcelerometru a čidla objemového průtoku jsou přesnější od etalonu komerčního simulátoru. Celkově je model simulátoru osazen v medvědoidním fantomu a plně funkční se zobrazením kvality nácviku resuscitace jednak na mobilním telefonu a na Labquestu 2.The aim of the bachelor’s thesis was to create a cardiopulmonary resuscitation simulator for laymen. The simulator was implemented for the purpose of practicing chest compressions combined with artificial ventilation. The chest compressions were performed by measuring acceleration using an accelerometer placed on the commercial device CPR Simulator EVE-B (Hivista), which also served as a benchmark for comparing compressions and the measured data. Artificial ventilation was constructed using a 281637 Flow Sensor (Hamilton Medical) supplemented with an MPXV7002DP differential pressure sensor (NXP Semiconductors) that feeds into a Labquest 2 imaging unit (Vernier). The entire system of the designed and commercial comparative solution is built into a sub-realistic model of a teddy bear with a height of approximately 120 cm. Measurements and calibrations were performed on the partial parts of the cardiopulmonary simulator, as well as on the overall assembled bear-type simulator. Accelerometer and volumetric flow sensor results are more accurate than the commercial simulator benchmark. Overall, the simulator model is mounted in a bearoid phantom and fully functional with CPR training quality displays on both the mobile phone and the Labquest 2.450 - Katedra kybernetiky a biomedicínského inženýrstvívelmi dobř

Aerospace medicine and biology: A continuing bibliography with indexes (supplement 385)

This bibliography lists 536 reports, articles and other documents introduced into the NASA Scientific and Technical Information System Database. Subject coverage includes: aerospace medicine and physiology, life support systems and man/system technology, protective clothing, exobiology and extraterrestrial life, planetary biology, and flight crew behavior and performance

From Benchtop to Beside: Patient-specific Outcomes Explained by Invitro Experiment

Study: Recent analyses show that females have higher early postoperative (PO) mortality and right ventricular failure (RVF) than males after left ventricular assist device (LVAD) implantation; and that this association is partially mediated by smaller LV size in females. Benchtop experiments allow us to investigate patient-specific (PS) characteristics in a reproducible way given the fact that the PS anatomy and physiology is mimicked accurately. With multiple heart models of varying LV size, we can directly study the individual effects of titrating the LVAD speed and the resulting bi-ventricular volumes, shedding light on the interplay between LV and RV as well as resulting inter-ventricular septum (IVS) positions, which may cause the different outcomes pertaining to sex. Methods: In vitro, we studied the impact of the heart size to IVS position using two smaller and two larger sized PS silicone heart phantoms derived from clinical CT images (Fig. 1A). With ultrasound crystals that were integrated on a placeholder inflow cannula, the IVS position was measured during LV and RV volume changes (dV) mimicking varying ventricular loading states (Fig. 1B). Figure 1 A Two small (blue) and two large PS heart phantoms (orange) on B benchtop. C Median septum curvature results. LVEDD/LVV/RVV: LV enddiastolic diameter/LV and RV volume. Results: Going from small to large dV, at zero curvature, the septum starts to shift towards the left; for smaller hearts at dV = -40 mL and for larger hearts at dV = -50 mL (Fig. 1C). This result indicates that smaller hearts are more prone to an IVS shift to the left than larger hearts. We conclude that smaller LV size may therefore mediate increased early PO LVAD mortality and RVF observed in females compared to males. Novel 3D silicone printing technology enables us to study accurate, PS heart models across a heterogeneous patient population. PS relationships can be studied simultaneously to clinical assessments and support the decision-making prior to LVAD implantation

Aerospace Medicine and Biology: A cumulative index to the 1982 issues

This publication is a cumulative index to the abstracts contained in the Supplements 229 through 240 of Aerospace Medicine and Biology: A continuing Bibliography. It includes three indexes: subject, personal author, and corporate source