13,314 Hits in 6.1 sec

Ultra High Dimensional Change Point Detection [article]

Xin Liu, Liwen Zhang, Zhen Zhang
2021 arXiv   pre-print
In this paper, we propose a two-stage approach to detect change points in ultra high dimension, by firstly proposing the dynamic titled current correlation screening method to reduce the input dimension  ...  Not only the spurious correlation between ultra-high dimensional covariates is taken into consideration in variable screening, but non-convex penalties are studied in change point detection in the ultra  ...  Thus, during the first stage of the our proposed procedure, we proposed to employ the dynamic titled current correlation screening (DTCCS) procedure to screen variables based on the high-dimensional correlation  ... 
arXiv:2106.04869v1 fatcat:44gxbn4ltzbg3eghgbu7nbo5rm

Three-Dimensional Scapular Kinematics during the Throwing Motion

Kristin E. Meyer, Erin E. Saether, Emily K. Soiney, Meegan S. Shebeck, Keith L. Paddock, Paula M. Ludewig
2008 Journal of Applied Biomechanics  
using a Pearson correlation analysis for each event.  ...  The maximum correlation between peak velocity and any scapular dependent variable was r = −0.05, with all p values > 0.05.  ... 
doi:10.1123/jab.24.1.24 fatcat:miqfkrk72bgcllvhmdqkhulh6q

Utility of 2D Video Analysis for Assessing Frontal Plane Trunk and Pelvis Motion during Stepping, Landing, and Change in Direction Tasks: A Validity Study

Rachel K Straub, Christopher M Powers
2022 International Journal of Sports Physical Therapy  
Bland Altman plots were used to assess the level of agreement between the 2D and 3D frontal plane angles at the trunk and pelvis. 2D and 3D frontal plane angles for all tasks were correlated in a positive  ...  However, the 95% limits of agreement across tasks ranged from -12.8° to 21.3° for the pelvis and -11.8° to 9.4° for the trunk.  ...  Prior to analysis, the MD between 2D and 3D angles was screened for outliers using Z scores. Variables with absolute Z scores > 3.0 were deemed outliers and removed.  ... 
doi:10.26603/001c.30994 pmid:35136682 pmcid:PMC8805121 fatcat:uphekst2rrhlvlaqa5veyti5ea

Assessment of In Vivo Lumbar Inter-Vertebral Motion: Reliability of a Novel Dynamic Weight-Bearing Magnetic Resonance Imaging Technique Using a Side-Bending Task

Niladri Kumar Mahato, Stephane Montuelle, Brian Clark
2019 Asian Spine Journal  
Between-session reliability results yielded high values for the intra-class correlation coefficient (0.86-0.93), coefficient of variation (13.3%-16.04%), and Pearson's correlation coefficients (0.89-0.98  ...  We have developed a novel, dynamic, MRI-based approach for quantifying in vivo lumbar inter-vertebral motion.  ...  Statistical analysis Between-session intra-class correlation coefficients (ICCs), coefficients of variation (CV), and Pearson's correlation coefficients were calculated for each measured variable (Table  ... 
doi:10.31616/asj.2018.0219 pmid:30691259 pmcid:PMC6547391 fatcat:ykguhuehdbb45ijc7zn3dltyxu

A Sensor-Based Screening Tool for Identifying High Pelvic Mobility in Patients Due to Undergo Total Hip Arthroplasty

Xueyang Wang, Arham Qureshi, Abhinav Vepa, Usama Rahman, Arnab Palit, Mark A. Williams, Richard King, Mark T. Elliott
2020 Sensors  
Here, we test the feasibility of using an inertial sensor fitted across the sacrum to measure change in pelvic tilt, and hence screen for patients with high pelvic mobility.  ...  We found a strong correlation between the device and radiograph measures for the change in pelvic tilt measure from standing to flexed-seated position (R2 = 0.911); 75% of absolute errors were under 5  ...  Sogut for their help with collating tilt angles from the robot data.  ... 
doi:10.3390/s20216182 pmid:33143034 fatcat:qvq2f2lkefe2rmjhctv56bfioy

Ranking very young Pinus radiata families for acoustic stiffness and validation by microfibril angle

Monika Sharma, Luis A. Apiolaza, Shakti Chauhan, J. Paul Mclean, Jan Wikaira
2015 Annals of Forest Science  
approaches to rapid, very early screening and selection of radiata pine families, using microfibril angle (MFA) as a reference for comparative purposes. & Method A key feature was tilting the trees at  ...  After 34 months, OW and CW materials were characterised independently for acoustic velocity (V), dynamic modulus of elasticity (MOE dynamic ), basic density and longitudinal shrinkage.  ...  Proseed Ltd provided the seedlings and the land for the trial.  ... 
doi:10.1007/s13595-015-0529-y fatcat:sguosx7nrza7fmwyj2svsi6dga

Wave optics propagation code for multiconjugate adaptive optics

Brent L. Ellerbroek, Gregory Cochran, Robert K. Tyson, Domenico Bonaccini, Michael C. Roggemann
2002 Adaptive Optics Systems and Technology II  
(NGS) WFS, and 50 meter phase screens with 1/32nd meter resolution) are possible using a Pentium III but require 1 to 6 days.  ...  Several possibilities for parallelizing the code for faster execution and the modeling of extremely large telescopes (ELT's) are discussed.  ...  For the slow tip/tilt mirror, the vector is the current command to the fast tip/tilt mirror.  ... 
doi:10.1117/12.454784 fatcat:jovsiapkivg27j7tcbw3bw3txi

Altered short-term neural plasticity related to schizotypal traits: Evidence from visual adaptation

Katharine N. Thakkar, Anna Antinori, Olivia L. Carter, Jan W. Brascamp
2018 Schizophrenia Research  
Evidence for decreased adaptation in individuals with schizophrenia is currently inconclusive, possibly due to heterogeneity in clinical and medication status across samples.  ...  We analyzed the strength and dynamics of visual adaptation in these paradigms, in relation to schizotypy.  ...  Acknowledgments The authors would like to thank Jiamei Zhang, Amina Guo, An-drew Rockett, Chinyere Jigo, Christina Sesi, Franco Bull, Michael Wertheimer for help with data collection.  ... 
doi:10.1016/j.schres.2018.04.013 pmid:29685421 pmcid:PMC6195854 fatcat:gwv54e2ybvhsdjvghglklwnmqi

2dx—User-friendly image processing for 2D crystals

Bryant Gipson, Xiangyan Zeng, Zi Yan Zhang, Henning Stahlberg
2007 Journal of Structural Biology  
Cryotransmission electron microscopy records high-resolution electron micrographs, which require computer processing for three-dimensional structure reconstruction.  ...  Electron crystallography determines the structure of two-dimensional (2D) membrane protein crystals and other 2D crystal systems.  ...  Mitsuoka, Ansgar Philippsen, Sriram Subramaniam, Vinzenz Unger, Jannet Vonck, and Tom Walz, who generously shared their knowledge and experience in image processing, and we thank Bob Glaeser and Rena Hill for  ... 
doi:10.1016/j.jsb.2006.07.020 pmid:17055742 fatcat:76xzmzz4hnd2pahg3nnowxl7v4

Experimental validation and model development for thermal transmittances of porous window screens and horizontal louvred blind systems

Robert Hart, Howdy Goudey, D. Charlie Curcija
2017 Journal of Building Performance Simulation, Taylor & Francis  
The proposed correlation changes the mean error between measured and simulated heat flux for the configurations measured from 13% to 1% while maintaining the interquartile range of errors at 5%.  ...  Correlation coefficients that fit the model to measured data are determined by optimizing the coefficient of determination between measured and simulated heat flux for the 176 configurations of horizontal  ...  Agreement is also good with EN 13125 for fully-tilted high-emissivity slats.  ... 
doi:10.1080/19401493.2017.1323010 fatcat:3pifjmm6bndrrfvl63jamd2jse

Collecting shoulder kinematics with electromagnetic tracking systems and digital inclinometers: A review

Daniel C Hannah
2015 World Journal of Orthopaedics  
The existing evidence has demonstrated that ETS are reliable and valid instruments for collecting static and dynamic kinematic data of the shoulder complex.  ...  The ability for clinicians and researchers to collect meaningful kinematic data is dependent on the reliability and validity of the instrumentation utilized.  ...  tilt, and 12.3° in upward-downward rotation when allowing for 4 mm in anatomical landmark variability.  ... 
doi:10.5312/wjo.v6.i10.783 pmid:26601060 pmcid:PMC4644866 fatcat:a77obwm7gjhdrh6sco2xfegwuq

Torsion during saccades between tertiary positions

P. Bruno, A. V. Van den Berg
1997 Experimental Brain Research  
The implications for three-dimensional models of saccadic control are discussed.  ...  However, this plane was tilted less relative to Listings plane than predicted by the half angle rule. The deviation was especially large for the yaw component of the tilt (56% of predicted).  ...  The difference in pitch tilt during acceleration and deceleration points to different dynamics (or dynamic compensation) of the horizontal and vertical-torsional muscles.  ... 
doi:10.1007/s002210050220 pmid:9419071 fatcat:fb34z3bf6ffgzjz2sqohdiivka

Scapular Angular Positioning at End Range Internal Rotation in Cases of Glenohumeral Internal Rotation Deficit

Michael R. Borich, Jolene M. Bright, David J. Lorello, Cort J. Cieminski, Terry Buisman, Paula M. Ludewig
2006 Journal of Orthopaedic and Sports Physical Therapy  
The model +, partial correlation, and P values were used to determine significance of the model and contributing variables for each motion.  ...  The results of this current study identify a possible mechanism for development of excessive scapular anterior tilt.  ... 
doi:10.2519/jospt.2006.2241 pmid:17193870 fatcat:je247d6utbbw5fgwgfaub4mhni

Initial-State-Dependent, Robust, Transient Neural Dynamics Encode Conscious Visual Perception [article]

Alexis T. Baria, Brian Maniscalco, Biyu J. He
2017 bioRxiv   pre-print
Recent research has identified late-latency, long-lasting neural activity as a robust correlate of conscious perception.  ...  These results suggest that brain dynamics underlying conscious visual perception belongs to the class of initial-state-dependent, robust, transient neural dynamics.  ...  (B) Trial-averaged activity trajectories in the 3-dimensional PC-space from an example subject, for seen and unseen trials separately, under the presentation of the right-tilt (blue and cyan) or left-tilt  ... 
doi:10.1101/133983 fatcat:o2pzmo3n4rcsjmkdn57mdyrxem

Scapular Kinematics in Athletes With and Without Rotator Cuff Tendinopathy: A Systematic Review

Xin Fu, Patrick Shu-hang Yung, Chun Cheong Ma, Hio Teng Leong
2019 Journal of sport rehabilitation  
Objectives: To review the literature on 3-dimensional scapular kinematics in overhead athletes with and without rotator cuff tendinopathy.  ...  We included studies that compared the changes in 3-dimensional scapular kinematics in athletes with and without rotator cuff tendinopathy.  ...  The authors hereby declare that there is no external financial support for this study.  ... 
doi:10.1123/jsr.2019-0095 pmid:31869815 fatcat:w4xwuxny2faj7fxiraldlyu3ti
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