La struttura della double bubble di area minima

In questa tesi viene presentata una scelta dei passaggi fondamentali per arrivare alla dimostrazione della congettura della double bubble, dovuta ad Hutchings, Morgan, Ritoré e Ros. Questa dimostrazione assicura l'esistenza e l'unicità della superficie minima che permette di racchiudere due volumi nello spazio reale tridimensionale; si tratta quindi di un caso particolare del problema delle bolle di sapone, che ha richiesto la messa a punto di strumenti sofisticati di teoria geometrica della misura, calcolo delle variazioni ed equazioni differenziali non lineari.

It rhymes! proposta di sottotitoli del cortometraggio animato "The Boy in the bubble" di Kealan O'Rourke

Questa tesi nasce innanzitutto dalla mia esperienza di tirocinio curriculare, durante la quale ho sottotitolato un cortometraggio irlandese di animazione narrato in rima (oltre che dalla mia passione antica per il cinema in lingua originale e più recente per il doppiaggio). La tesi si compone di tre capitoli. Inizia con l'analisi di una parte della teoria del sottotitolaggio, poi presenta il filmato, alcuni suoi autori, il testo originale e i miei sottotitoli, e si conclude con la spiegazione del metodo usato per realizzare concretamente l'adattamento.

A robotic system to train activities of daily living in a virtual environment

In the past decade, several arm rehabilitation robots have been developed to assist neurological patients during therapy. Early devices were limited in their number of degrees of freedom and range of motion, whereas newer robots such as the ARMin robot can support the entire arm. Often, these devices are combined with virtual environments to integrate motivating game-like scenarios. Several studies have shown a positive effect of game-playing on therapy outcome by increasing motivation. In addition, we assume that practicing highly functional movements can further enhance therapy outcome by facilitating the transfer of motor abilities acquired in therapy to daily life. Therefore, we present a rehabilitation system that enables the training of activities of daily living (ADL) with the support of an assistive robot. Important ADL tasks have been identified and implemented in a virtual environment. A patient-cooperative control strategy with adaptable freedom in timing and space was developed to assist the patient during the task. The technical feasibility and usability of the system was evaluated with seven healthy subjects and three chronic stroke patients.

Vapor bubble generation around gold nano-particles and its application to damaging of cells

We investigated vapor bubbles generated upon irradiation of gold nanoparticles with nanosecond laser pulses. Bubble formation was studied both with optical and acoustic means on supported single gold nanoparticles and single nanoparticles in suspension. Formation thresholds determined at different wavelengths indicate a bubble formation efficiency increasing with the irradiation wavelength. Vapor bubble generation in Bac-1 cells containing accumulations of the same particles was also investigated at different wavelengths. Similarly, they showed an increasing cell damage efficiency for longer wavelengths. Vapor bubbles generated by single laser pulses were about half the cell size when inducing acute damage.

Fossil bubble in porphyritic basaltic pyroclasts produced by small and large strombolian eruption at Pacaya, Guatemala

We investigate compositionally monotonous, but energetically diverse, tephra samples from Pacaya to see if fossil bubbles in pyroclasts could reflect eruptive style. Bubble size distributions (BSD) were determined for four ash to lapilli size tephra samples using an adapted version of stereology conversion by Sahagian and Proussevitch (1998). Eruptions range from very weak to very energetic. Hundreds of ESEM BSEs images were processed throughout ImageJ software for a robust and statistically correct data set of vesicles (minimum 700 bubbles per sample). Qualitative textural analysis and major element chemical compositions were also executed. There is higher vesicularity for explosive pyroclasts and an inverse correlation between bubble number density (NV) and explosivity.

Train your Brain - Psychotherapeutische Interventionsprogramme bei Angststörungen

Ängste und Depressionen gehören mitunter zu den häufigsten psychischen Störungen, die mit starkem individuellen Leiden und hohen sozioökonomischen Kosten einhergehen. Kulturell eingebettete biopsychosoziale Belastungsfaktoren tragen zur Entstehung, Aufrechterhaltung und Chronifizierung dieser häufigen Leiden bei. Moderne psychotherapeutische Interventionsprogramme können helfen, die individuellen Belastungsfaktoren besser zu ordnen, Vermeidungsverhalten zu durchbrechen und individuelles Wohlbefinden und psychosoziales Funktionieren zu fördern. Oftmals sind es kleine und feine Verhaltensänderungen im Alltag, die die subjektive Lebensqualität deutlich verbessern. Der Vortrag bietet eine kritische Übersicht über aktuelle psychotherapeutische Behandlungsansätze und deren empirische Evidenz.