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Lead-lag analysis via sparse co-projection in correlated text streams

Fangzhao Wu, Yangqiu Song, Shixia Liu, Yongfeng Huang, Zhenyu Liu
2013 Proceedings of the 22nd ACM international conference on Conference on information & knowledge management - CIKM '13  
To detect the correlation, we use a projection vector to project two text streams onto the same space, and then use a least square cost function to regress one text stream over the other with different  ...  time lags.  ...  SPARSE CO-PROJECTION In this section, we introduce in detail our algorithm for analyzing the correlation between text streams.  ... 
doi:10.1145/2505515.2505554 dblp:conf/cikm/WuSLHL13 fatcat:jcvbcyjwijbrtar6nvnbfsxlcu

Identifying Predictive Causal Factors from News Streams

Ananth Balashankar, Sunandan Chakraborty, Samuel Fraiberger, Lakshminarayanan Subramanian
2019 Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP)  
We present the Predictive Causal Graph (PCG) which allows to detect latent relationships between events mentioned in news streams.  ...  We show that PCG can be used to extract latent features from news streams, outperforming other graph-based methods in prediction error of 10 stock price time series for 12 months.  ...  text streams.  ... 
doi:10.18653/v1/d19-1238 dblp:conf/emnlp/BalashankarCFS19 fatcat:ikngmp3uzzhmrg77t6lau5ebxi

Climate impacts on multidecadal pCO2 variability in the North Atlantic: 1948–2009

Melissa L. Breeden, Galen A. McKinley
2016 Biogeosciences  
<i>p</i>CO<sub>2</sub> in the subpolar gyre.  ...  Positive AMO is also associated with a significant reduction in dissolved inorganic carbon (DIC) in the subpolar gyre, due primarily to reduced vertical mixing; the net impact of positive AMO is to reduce  ...  In our simulation, the NAO and MOC are significantly correlated (r = 0.57, Table S1 ) and there is also a high correlation (r = 0.86) between the NAO (Fig. S3 ) and the 15-year-lagged AMO.  ... 
doi:10.5194/bg-13-3387-2016 fatcat:emxuu53t2fcezckdkxzwr6t3q4

Recovery of a mining-damaged stream ecosystem

Christopher A. Mebane, Robert J. Eakins, Brian G. Fraser, William J. Adams
2015 Elementa: Science of the Anthropocene  
This paper presents a 30+ year record of changes in benthic macroinvertebrate communities and fish populations associated with improving water quality in mining-influenced streams.  ...  (Co) into tributaries.  ...  affected streams, ecological assumptions, interpretations of chemical guidelines and project-specific goals in Text S2.  ... 
doi:10.12952/journal.elementa.000042 fatcat:kqicqreelne5zce4l7napceug4

Arctic cryosphere and Milankovitch forcing of Great Basin paleoclimate

Matthew Lachniet, Yemane Asmerom, Victor Polyak, Rhawn Denniston
2017 Scientific Reports  
Here we show -by a detailed phasing analysis of a well-dated stalagmite δ 18 O time series -that Great Basin paleoclimate is linearly related to, but lagged, the 23,000 yr precession cycle in northern  ...  The orbital paradigm suggests that Northern Hemisphere Summer Insolation on June 21 at 65°N latitude (hereafter NHSI) controls global climate via variations in ice sheet extent, which in turn exert responses  ...  Author Contributions M.S.L. wrote the manuscript, devised and completed statistical analyses, completed stable isotope analyses, and completed field work; Y.A. contributed to manuscript content and analysis  ... 
doi:10.1038/s41598-017-13279-2 pmid:29021632 pmcid:PMC5636905 fatcat:arfc4caiyfarfmus7yaa724zde

Moment-by-moment tracking of naturalistic learning and its underlying hippocampo-cortical interactions [article]

Sebastian Michelmann, Amy R. Price, Bobbi Aubrey, Werner K. Doyle, Daniel Friedman, Patricia Dugan, Orrin Devinsky, Sasha Devore, Adeen Flinker, Uri Hasson, Kenneth A. Norman
2020 bioRxiv   pre-print
In auditory processing regions we demonstrate the rapid reinstatement of upcoming information after a single exposure; this neural measure of predictive recall correlates with behavioral measures of event  ...  In patients undergoing electrocorticographic recordings, we then track mnemonic information in high frequency activity (70 – 200 Hz) as patients listen to a story twice.  ...  peak at −1290ms (see Supplementary Information for a fine 9 grained analysis via cross correlation); note that this negative lag is expected because a behavioral response 10 can only happen after an  ... 
doi:10.1101/2020.12.09.416438 fatcat:vrpndkkwgvfhlbxazdj7m37yjq

Seasonal to multidecadal variability of the width of the tropical belt

N. A. Davis, T. Birner
2013 Journal of Geophysical Research - Atmospheres  
is a great deal of uncertainty in  ...  SEASONAL TO MULTI-DECADAL VARIABILITY OF THE WIDTH OF THE TROPICAL BELT An expansion of the tropical belt has been extensively reported in observations, reanalyses, and climate model simulations, but there  ...  As such, we will exclude CHAMP from our statistical analysis as its coverage is too sparse.  ... 
doi:10.1002/jgrd.50610 fatcat:e3omldqlujhrdisycf3i7al3fa

A Tutorial on Auditory Attention Identification Methods

Emina Alickovic, Thomas Lunner, Fredrik Gustafsson, Lennart Ljung
2019 Frontiers in Neuroscience  
For example, canonical correlation analysis (CCA) finds a linear subset of electrophysiological data that best correlates to audio data and a similar subset of audio data that best correlates to electrophysiological  ...  We focus on (1) correlation-based approaches (CCA), (2) encoding/decoding models based on dense estimation, and (3) (adaptive) encoding/decoding models based on sparse estimation.  ...  FUNDING This work was supported in part by a research grant from the Oticon Foundation.  ... 
doi:10.3389/fnins.2019.00153 pmid:30941002 pmcid:PMC6434370 fatcat:lhg443ebyrgwlpmrcj4q3xo2ry

Simulated decadal oscillations of the Atlantic meridional overturning circulation in a cold climate state

Masakazu Yoshimori, Christoph C. Raible, Thomas F. Stocker, Manuel Renold
2009 Climate Dynamics  
The latter induces a positive feedback via synoptic eddy activity in the atmosphere.  ...  The analysis suggests an interaction between the NAO and an anomalous subpolar gyre circulation in which sea ice near and south of the Labrador Sea plays an important role in generating a large local thermal  ...  This work is supported by the National Centre of Competence in Research (NCCR) Climate funded by the Swiss National Science Foundation and the EU project EPICA MIS.  ... 
doi:10.1007/s00382-009-0540-9 fatcat:obujyklddzhchmiiihztmafbrm

Mechanisms of Internal Atlantic Multidecadal Variability in HadGEM3-GC3.1 at Two Different Resolutions

J. I. Robson, L. J. Wilcox, N. Dunstone
2021 Journal of Climate  
This study broadly characterises and compares the key processes governing internal AMV in two resolutions of HadGEM3-GC3.1: N216ORCA025, corresponding to ~ 60km in the atmosphere and 0.25° in the ocean  ...  In N216, the NAO is the dominant driver, while upper-ocean salinity-controlled density anomalies that originate from the Arctic appear to be the dominant driver in N96.  ...  Unfortunately, observations remain too sparse and short for in-depth analysis to settle this debate.  ... 
doi:10.1175/jcli-d-21-0281.1 fatcat:a7dsceijcbfdzphazae5wg3s2i

Climatic dipoles drive two principal modes of North American boreal bird irruption

Courtenay Strong, Benjamin Zuckerberg, Julio L. Betancourt, Walter D. Koenig
2015 Proceedings of the National Academy of Sciences of the United States of America  
correlated with climate variability.  ...  Here, analysis of more than 2 million Pine Siskin observations from Project FeederWatch, a citizen science program, reveals two principal irruption modes (North-South and West-East), both of which are  ...  FeederWatch Leading Modes. The modes of Pine Siskin count variability were objectively determined by performing EOF analysis (55) .  ... 
doi:10.1073/pnas.1418414112 pmid:25964328 pmcid:PMC4450426 fatcat:57xo36ub55cndhyke6vggvncl4

VisemeNet: Audio-Driven Animator-Centric Speech Animation [article]

Yang Zhou, Zhan Xu, Chris Landreth, Evangelos Kalogerakis, Subhransu Maji, Karan Singh
2018 arXiv   pre-print
; speech styles like mumbling or shouting are strongly co-related to the motion of facial landmarks; and animator style is encoded in viseme motion curve profiles.  ...  Our three-stage Long Short-Term Memory (LSTM) network architecture is motivated by psycho-linguistic insights: segmenting speech audio into a stream of phonetic-groups is sufficient for viseme construction  ...  Our experiments were performed in the UMass GPU cluster obtained under the Collaborative R&D Fund managed by the Massachusetts Technology Collaborative.  ... 
arXiv:1805.09488v1 fatcat:ahgmxkuawjg7hguwc37rs5lezy

Mechanism of Interannual to Decadal Variability of the North Atlantic Circulation

Carsten Eden, Jürgen Willebrand
2001 Journal of Climate  
the subtropics due to changes in Ekman transport.  ...  The delayed response is an increase in subpolar heat transport due to enhanced meridional overturning and due to a spinup of the subpolar gyre.  ...  At the same time the ocean gains anomalous heat in the Gulf stream region. The temporal correlation of both EOF modes is 0.71 (Fig. 5a) .  ... 
doi:10.1175/1520-0442(2001)014<2266:moitdv>;2 fatcat:nfymo7a7jra3zjjmy5d6szo27y

3D for the people: multi-camera motion capture in the field with consumer-grade cameras and open source software

Brandon E. Jackson, Dennis J. Evangelista, Dylan D. Ray, Tyson L. Hedrick
2016 Biology Open  
Ecological, behavioral and biomechanical studies often need to quantify animal movement and behavior in three dimensions.  ...  In laboratory studies, a common tool to accomplish these measurements is the use of multiple, calibrated high-speed cameras.  ...  The cross-correlation operations are performed within Argus Sync and processed automatically; results are saved in a user-specified text file.  ... 
doi:10.1242/bio.018713 pmid:27444791 pmcid:PMC5051647 fatcat:hqmbs42xsjfk3azhbfi3si2w7q

Sparse Learning for Variable Selection with Structures and Nonlinearities [article]

Magda Gregorova
2019 arXiv   pre-print
In this thesis we discuss machine learning methods performing automated variable selection for learning sparse predictive models.  ...  There are multiple reasons for promoting sparsity in the predictive models.  ...  The empirical results correspond to the theoretical complexity analysis of section 3.2 in the main text.  ... 
arXiv:1903.10978v1 fatcat:crfq5vy2qfaa5pnco2gowbi2rq
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