Speaker: Prof. Dr. Gerhard Jäger, University of Tübingen, Institute of Linguistics

Title: From Words to Features to Trees: Computing a World Tree of Languages from Word Lists
Presentation in English

Date: Monday, 16 October 2017, 11:00 a.m.
Location: Carl-Bosch-Auditorium, Studio Villa Bosch, Schloss-Wolfsbrunnenweg 33, 69118 Heidelberg (Studio entrance between Villa Bosch and HITS)
Parking: Parking garage "Unter der Boschwiese" (free of charge)

Abstract:
Since over 200 years, historical linguists strive to reconstruct family trees of human languages using systematic comparisons of vocabulary and grammar of extant or documented languages. Since about 20 years, these efforts are complemented by computational approaches, deploying phylogenetic inference algorithms from computational biology to analyse language data. So far, both lines of research have been confined to individual language families, i.e., phylogenetic units with a time depth of at most 10,000 years.
In this talk I will present and discuss a workflow that starts out from unannotated word lists from ca. 6,000 languages and dialects across the world. Using feature extraction techniques from machine learning, a feature matrix is extracted which in turn serves as input for Maximum-Likelihood phylogenetic inference (using the software RAxML). This leads to a phylogenetic tree over those languages and dialects, which is in very good agreement with expert classifications, correlates well with anthropological and genetic data, and also reveals some interesting deeper signals.

Curriculum vitae:
Gerhard Jäger (http://www.sfs.uni-tuebingen.de/~gjaeger/) is professor of General Linguistics at Tübingen University. He received his PhD and habilitation from Humboldt University at Berlin and held previous positions at Munich, UPenn, Utrecht and Stanford. He is PI of an ERC Advanced Grant "Language Evolution: The Empirical Turn" and co-PI of the interdisciplinary DFG-Research Unit "Words, Bones, Genes, Tools: Tracking Linguistic, Cultural and Biological Trajectories of the Human Past". His research interests include computational historical linguistics and game-theoretic pragmatics.

Contact:
Benedicta Frech (This email address is being protected from spambots. You need JavaScript enabled to view it., phone: 06221-533-263)

The Institute of Computer Engineering (ZITI) at Heidelberg University, Germany, invites applications for a newly created

W3-Professorship in Medical Technology.

The core competencies of the ZITI lie in the development and operation of specialized computer hardware and hardware-associated soft- and firmware for the solution of challenging computer problems and for data acquisition, in the development of application specific microchips (analogue and digital) for digital communication and sensors, as well as in the areas of automation, robotics and biomechanics.

The main focus of research of this new professorship should lie in the development of new concepts for and in the construction of medical instruments, to which the core competencies of ZITI can contribute. For their practical application and development, the selected candidate should establish cooperation with both clinical faculties of the University and the German Cancer Research Center (DKFZ), where already many developments and applications of new technologies have occurred (e.g. PET/MRT, 7T, radiotherapy, proton and ion therapy, robotics for surgery, prosthesis).

The professorship will be in the Department of Physics and Astronomy.

The successful candidate will be expected to contribute to teaching within the master programme „Computer Engineering“ as well as to the Bachelor and Master programmes in physics, in particular for the specialization “Medical Physics”.

Prerequisites for application are a university degree and (in accordance with Article 47, paragraph 2 of the Higher Education Law of the State of Baden-Württemberg) a Habilitation, a successfully evaluated junior professorship or equivalent qualification. The University of Heidelberg seeks to achieve a higher proportion of women in areas where they have not been adequately represented so far. Women with the required qualification are particularly encouraged to apply. Preference will be given to disabled applicants with equal qualifications for the position.

Qualified candidates are invited to submit their application including CV, a list of publications, a list with teaching experience and a research plan in electronic form (pdf) until 16.10.2017 to the Dean of the Department of Physics and Astronomy, Im Neuenheimer Feld 226, D-69120 Heidelberg (This email address is being protected from spambots. You need JavaScript enabled to view it.). Further information can also be obtained from the managing director of ZITI (This email address is being protected from spambots. You need JavaScript enabled to view it.).

Am 8. Juli laden die Fakultät für Mathematik & Informatik und das Interdisziplinäre Zentrum für Wissenschaftliches Rechnen (IWR) gemeinsam die interessierte Öffentlichkeit zum Tag der Offenen Tür im Mathematikon der Universität Heidelberg ein. Weitere Informationen hier!

Die Gruppe Optimierung, Robotik & Biomechanik (ORB) des ZITI organisiert ab 26. bis 28.07.2017 eine Summerschool zum Thema "Cameras, Drones & Laserscanning" im Kloster Lorsch. Weitere Informationen dazu finden Sie hier: http://orb.iwr.uni-heidelberg.de/cdl2017/

Speaker: Prof. Dr. Stefan Wuchty, Dept. of Computer Science, University of Miami, USA, EML/HITS alumnus (1999-2002)

Title: Quantifying Group Dynamics in Online Social Media: ISIS and Beyond, Presentation in English
Date: Friday, June 30, 2017, 4 p.m.
Location: HITS gGmbH, Cafeteria, Schloss-Wolfsbrunnenweg 35, 69118 Heidelberg
Parking: Parking garage "Unter der Boschwiese" (free of charge)

Abstract:
Support for an extremist entity such as the Islamic State (ISIS) emerges as a product of complex interactions among large numbers of supporters and manages to survive online despite considerable external pressure. Examining longitudinal records of online activity on social media platforms, we will introduce an ecology of self-organized pro-ISIS aggregates, groups of online followers that are defined as ad-hoc groups via social media pages.
Compared to other examples, the emergence of such groups accelerates prior to the onset of real world events that appeared out of apparent calm, a universal signal that can be tapped to predict the time of a real world event.
As for ISIS, we observed that groups adopt novel adaptive mechanisms to enhance their survival as well as predict that development of large, potentially potent pro-ISIS aggregates can be thwarted by targeting smaller ones.

More information: https://www.wuchtylab.org/

Contact:
Benedicta Frech (This email address is being protected from spambots. You need JavaScript enabled to view it., phone: 06221-533-263)

Speaker: Prof. Dr. Konrad Polthier, Freie Universität Berlin, Mathematical Geometry Processing

Title: New Shapes, New Materials and New Processing, Presentation in English
Date: Monday, 24 April 2017, 11:00 a.m.
Location: Carl-Bosch-Auditorium, Studio Villa Bosch, Schloss-Wolfsbrunnenweg 33, 69118 Heidelberg (Studio entrance between Villa Bosch and HITS)
Parking: Parking garage "Unter der Boschwiese" (free of charge)

Abstract:
The borderlines between virtual and physical forms dissolve and allow unprecedented transitions in both directions. New 3D scanners provide insight on various length scales and unveil an increasingly larger variety of geometric forms in nature. New 3D fabrication technologies produce physical shapes with a variety of new materials and of new internal structures. Few is yet understood. The mathematical language for shapes needs to be revisited, including geometry processing and modelling technologies. The talk will show selected examples from biology, computer graphics and industrial CAD to illustrate open questions related to the novel wealth of shapes.

Short CV:
Konrad Polthier is full professor of mathematics at Freie Universität Berlin (FU) since 2005. He received his PhD from the University of Bonn in 1994, and headed research groups at Technische Universität Berlin and Zuse Institute Berlin before joining FU Berlin. His current research focuses on discrete differential geometry, applied geometry, geometry processing and mathematical visualization. Results from him have been applied in industry such as computer graphics, computer aided design and architecture.

Contact:
Benedicta Frech (This email address is being protected from spambots. You need JavaScript enabled to view it., phone: 06221-533-263)

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