نتایج جستجو برای: polarity

تعداد نتایج: 25145  

2011
Michael E. Werner Peter Hwang Fawn Huisman Peter Taborek Clare C. Yu Brian J. Mitchell

Planar cell polarization represents the ability of cells to orient within the plane of a tissue orthogonal to the apical basal axis. The proper polarized function of multiciliated cells requires the coordination of cilia spacing and cilia polarity as well as the timing of cilia beating during metachronal synchrony. The planar cell polarity pathway and hydrodynamic forces have been shown to inst...

2011
Manfred Klenner Simon Clematide Stefanos Petrakis Marc Luder

We introduce the task of word and phrase-level polarity annotation for German as part of an attempt to develop a compositional theory of clause-level polarity determination. Thus, annotations should give access to the nested building blocks, the structural strata of polarity composition. Therefore and in contrast to existing polarity-tagged corpora, we annotate not exclusively on the basis of s...

Journal: :Inf. Process. Manage. 2016
Rui Xia Feng Xu Jianfei Yu Yong Qi Erik Cambria

The polarity shift problem is amajor factor that affects classification performance ofmachinelearning-based sentiment analysis systems. In this paper, we propose a three-stage cascade model to address the polarity shift problem in the context of document-level sentiment classification. We first split each document into a set of subsentences and build a hybrid model that employs rules and statis...

Journal: :NeuroImage 2018
Damien Wright Claire Mitchell Benjamin R. Dering Elena Gheorghiu

Electrophysiological studies of symmetry have found a difference wave termed the Sustained Posterior Negativity (SPN) related to the presence of symmetry. Yet the extent to which the SPN is modulated by luminance-polarity and colour content is unknown. Here we examine how luminance-polarity distribution across the symmetry axis, grouping by luminance polarity, and the number of colours in the s...

2016
Shalini Singh Danielle Howell Niraj Trivedi Ketty Kessler Taren Ong Pedro Rosmaninho Alexandre Asf Raposo Giles Robinson Martine F Roussel Diogo S Castro David J Solecki

In the developing mammalian brain, differentiating neurons mature morphologically via neuronal polarity programs. Despite discovery of polarity pathways acting concurrently with differentiation, it's unclear how neurons traverse complex polarity transitions or how neuronal progenitors delay polarization during development. We report that zinc finger and homeobox transcription factor-1 (Zeb1), a...

Journal: :Language Resources and Evaluation 2016
Rahim Dehkharghani Yücel Saygin Berrin A. Yanikoglu Kemal Oflazer

Sentiment analysis aims to extract the sentiment polarity of given segment of text. Polarity resources that indicate the sentiment polarity of words are commonly used in different approaches. While English is the richest language in regard to having such resources, the majority of other languages, including Turkish, lack polarity resources. In this work we present the first comprehensive Turkis...

2015
Yanfang Cao Pu Zhang Anping Xiong

This paper focuses on the task of disambiguating polarity-ambiguous words and the task is reduced to sentiment classification of aspects, which we refer to sentiment expectation instead of semantic orientation widely used in previous researches. Polarity-ambiguous words refer to words like” large, small, high, low ”, which pose a challenging task on sentiment analysis. In order to disambiguate ...

Journal: :Ergonomics 2014
Cosima Piepenbrock Susanne Mayr Axel Buchner

The 'positive polarity advantage' describes the fact that reading performance is better for dark text on light background (positive polarity) than for light text on dark background (negative polarity). We investigated the underlying mechanism by assessing pupil size and proofreading performance when reading positive and negative polarity texts. In particular, we tested the display luminance hyp...

Journal: :Physical chemistry chemical physics : PCCP 2015
Sudip Kumar Mondal Ken-ichi Inoue Shoichi Yamaguchi Tahei Tahara

We study the effective polarity of an air/liquid-mixture interface by using interface-selective heterodyne-detected electronic sum frequency generation (HD-ESFG) and vibrational sum frequency generation (HD-VSFG) spectroscopies. With water and N,N-dimethylformamide (DMF) chosen as two components of the liquid mixture, the bulk polarity of the mixture is controlled nearly arbitrarily by the mixi...

Journal: :Essays in biochemistry 2012
Imogen Elsum Laura Yates Patrick O Humbert Helena E Richardson

The Scribble, Par and Crumbs modules were originally identified in the vinegar (fruit) fly, Drosophila melanogaster, as being critical regulators of apico-basal cell polarity. In the present chapter we focus on the Scribble polarity module, composed of Scribble, discs large and lethal giant larvae. Since the discovery of the role of the Scribble polarity module in apico-basal cell polarity, the...

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