Uncovering hidden structures: previously undescribed pseudopodia and ectoplasmic structures in planktonic foraminifera

The uncovering of hidden structures by Latent Semantic Analysis

Latent Semantic Analysis (LSA) is a well known method for information retrieval. It has also been applied as a model of cognitive processing and word-meaning acquisition. This dual importance of LSA derives from its capacity to modulate the meaning of words by contexts, dealing successfully with polysemy and synonymy. The underlying reasons that make the method work are not clear enough. We pro...

Planktonic foraminifera model

A dynamic global model for planktonic foraminifera I. Fraile, M. Schulz, S. Mulitza, and M. Kucera Department of Geosystem modelling, University of Bremen, P.O. Box 330440, 28334 Bremen, Germany DFG Research Center Ocean Marigins, University of Bremen, P.O. Box 330440, 28334 Bremen, Germany Institute of Geosciences, Eberhard Karls University of Tübingen, Sigwartstrasse 10, 72076 Tübingen, Germa...

Uncovering Shared Structures in Multiclass Classification

We suggest a method for multi-class learning with many classes by simultaneously learning shared characteristics common to the classes, and predictors for the classes in terms of these characteristics. We cast this as a convex optimization problem, using trace-norm regularization, study gradient-based optimization both for the linear case and the kernelized setting, and show how this approach c...

Hidden Cayley graph structures

Uncovering the acoustic vowel space of a previously undescribed language: The vowels of Nambo.

This study presents the first acoustic description of the vowel space of a Papuan language-Nambo, spoken in southern Papua New Guinea-based on duration and first and second formant measurements from 19 adult male and female speakers across three age groups (young, middle-aged, senior). Phonemically, Nambo has six full vowels /i, e, æ, ɑ, o, u/ and a reduced vowel tentatively labeled /ə/. Unlike...