HONORING TORSEN N. WIESEL

A Celebration in Honor of Torsten N. Wiesel: Entering his Tenth Decadehttps://digitalcommons.rockefeller.edu/posters/1200/thumbnail.jp

Gender quotas and the crisis of the mediocre man

Quotas aren't anathema to meritocracy: they increase competence levels by displacing mediocre men, write Tim Besley, Olle Folke, Torsten Persson and Johanna Rickn

Integrating concepts from constraint programming and operations research algorithms

von Torsten FahlePaderborn, Univ., Diss., 200

Imprints of magnetic power and helicity spectra on radio polarimetry statistics

Statistical properties of turbulent magnetic fields in radio-synchrotron sources should imprint on the statistics of polarimetric observables. In search of these imprints, we calculate correlation and cross-correlation functions from a set of observables containing the total intensity I, the polarized intensity P and the Faraday depth phi. The correlation functions are evaluated for all combinations of observables up to fourth order in the magnetic field B. We derive these as far as possible analytically and from first principles only using some basic assumptions such as Gaussian statistics of the underlying magnetic field in the observed region and statistical homogeneity. We further assume some simplifications to reduce the complexity of the calculations, as for a start we were interested in a proof of concept. Using this statistical approach, we show that it is in principle possible to gain information about the helical part of the magnetic power spectrum, namely via the correlation functions and . Using this insight, we construct an easy-to-use test for helicity, called LITMUS (Local Inference Test for Magnetic fields which Uncovers heliceS). For now, all calculations are given in a Faraday-free case, but set up in a way so that Faraday rotational effects could be included later on.Comment: 24 pages, 4 figures; typos corrected; additional explanations in section 1 and 2; revised and extended derivation in section 5, results unchange

Introduction to the 26th International Conference on Logic Programming Special Issue

This is the preface to the 26th International Conference on Logic Programming Special IssueComment: 6 page

Asynchronous grammaticalization: V1-conditionals in present-day English and German

The present paper contrasts verb-first (= V1-)conditionals in written usage in present-day English and German. Based on the hypothesis that V1-protases originated in independent interrogatives and then grammaticalized as conditional subordinate clauses in an asynchronous fashion in both languages, we use data from the British National Corpus (BNC) and the Deutsches Referenzkorpus (DeReKo) to investigate the lexical overlap of V1-protases with interrogatives and their functional overlap with ‘if-/wenn’-conditionals. The results show, inter alia, that English V1-conditionals are highly divergent from polar interrogatives and occupy a functional niche with respect to ‘if-’conditionals, with their German counterparts showing more transitional characteristics in both respects; they also suggest a special role for V1-protases with ‘should/sollte’ in expressing a subtype of neutral, rather than tentative, conditionality. Finally, prospects are discussed for future research regarding possible synchronic (i.e. discourse-functional) and diachronic (i.e. systemic) motivations for the differences and similarites observed between V1-conditionals in the two present-day languages