Emmanuel Kant | EPFL Graph Search

Emmanuel Kant (Immanuel Kant ), né le à Königsberg en Prusse (aujourd'hui appelée Kaliningrad en Russie), et mort le dans cette même ville, est un philosophe prussien, fondateur du criticisme et de la doctrine dite « idéalisme transcendantal ». Grand penseur de lAufklärung (Lumières allemandes), Kant a exercé une influence considérable sur l'idéalisme allemand, la philosophie analytique, la phénoménologie, la philosophie moderne, et la pensée critique en général. Son œuvre, considérable et diverse dans ses intérêts, mais centrée autour des trois Critiques – à savoir la Critique de la raison pure, la Critique de la raison pratique et la Critique de la faculté de juger – fait ainsi l'objet d'appropriations et d'interprétations successives et divergentes. Biographie Emmanuel Kant naît en 1724 à Königsberg en Prusse-Orientale dans un milieu modeste : son père, Johann Georg Kant (né en 1683 à Memel ; mort en 1746 à Königsberg) d'origine écossaise, est sellier, et sa mère, Ann

Non-invasive brain stimulation of motor cortex induces embodiment when integrated with virtual reality feedback

Javier Bello Ruiz, Olaf Blanke, Matteo Franza, Mattia Pinardi, Thomas Schmidlin, Andrea Serino, Marco Solcà, Marianne Anke Stephan

Previous evidence highlighted the multisensory-motor origin of embodiment - that is, the experience of having a body and of being in control of it - and the possibility of experimentally manipulating it. For instance, an illusory feeling of embodiment towards a fake hand can be triggered by providing synchronous visuo-tactile stimulation to the hand of participants and to a fake hand or by asking participants to move their hand and observe a fake hand moving accordingly (rubber hand illusion). Here, we tested whether it is possible to manipulate embodiment not through stimulation of the participant's hand, but by directly tapping into the brain's hand representation via non-invasive brain stimulation. To this aim, we combined transcranial magnetic stimulation (TMS), to activate the hand corticospinal representation, with virtual reality (VR), to provide matching (as contrasted to non-matching) visual feedback, mimicking involuntary hand movements evoked by TMS. We show that the illusory embodiment occurred when TMS pulses were temporally matched with VR feedback, but not when TMS was administered outside primary motor cortex, (over the vertex) or when stimulating motor cortex at a lower intensity (that did not activate peripheral muscles). Behavioural (questionnaires) and neurophysiological (motor-evoked-potentials, TMS-evoked-movements) measures further indicated that embodiment was not explained by stimulation per se, but depended on the temporal coherence between TMS-induced activation of hand corticospinal representation and the virtual bodily feedback. This reveals that non-invasive brain stimulation may replace the application of external tactile hand cues and motor components related to volition, planning and anticipation.

2018

Charting the space of 3D CFTs with a continuous global symmetry

Alessandro Vichi

We study correlation functions of a conserved spin-1 current J in three dimensional Conformal Field Theories (CFTs). We investigate the constraints imposed by permutation symmetry and current conservation on the form of three point functions and the four point function JJJJ(sigma) and identify the minimal set of independent crossing symmetry conditions. We obtain a recurrence relation for conformal blocks for generic spin-1 operators in three dimensions. In the process, we improve several technical points, facilitating the use of recurrence relations. By applying the machinery of the numerical conformal bootstrap we obtain universal bounds on the dimensions of certain light operators as well as the central charge. Highlights of our results include numerical evidence for the conformal collider bound and new constraints on the parameters of the critical O(2) model. The results obtained in this work apply to any unitary, three dimensional CFT.

Springer2019

Comparing two forms of concept map critique activities to support knowledge integration in biology education

Beat Adrian Schwendimann

Concept map activities often lack a subsequent revision step that facilitates knowledge integration. This study compares two kinds of concept map critique activities embedded in an evolution unit: Student dyads in one group compared their concept maps against an expert map while dyads in the other group conducted a peer-review. Analysis of the concept maps suggests that both treatment groups significantly improved their understanding of evolution. However, the two groups developed different criteria: The expert-map group focused mostly on concept-focused criteria like concept classification while the peer-review group used more link-focused criteria like link labels and missing connections. This paper suggests that both critique activities can be beneficial to making more coherent connections across different topics in biology.

2014

Non-invasive brain stimulation of motor cortex induces embodiment when integrated with virtual reality feedback

Javier Bello Ruiz, Olaf Blanke, Matteo Franza, Mattia Pinardi, Thomas Schmidlin, Andrea Serino, Marco Solcà, Marianne Anke Stephan

2018