109 research outputs found
Noise Reduction in Gravitational-wave Data via Deep Learning
With the advent of gravitational wave astronomy, techniques to extend the
reach of gravitational wave detectors are desired. In addition to the
stellar-mass black hole and neutron star mergers already detected, many more
are below the surface of the noise, available for detection if the noise is
reduced enough. Our method (DeepClean) applies machine learning algorithms to
gravitational wave detector data and data from on-site sensors monitoring the
instrument to reduce the noise in the time-series due to instrumental artifacts
and environmental contamination. This framework is generic enough to subtract
linear, non-linear, and non-stationary coupling mechanisms. It may also provide
handles in learning about the mechanisms which are not currently understood to
be limiting detector sensitivities. The robustness of the noise reduction
technique in its ability to efficiently remove noise with no unintended effects
on gravitational-wave signals is also addressed through software signal
injection and parameter estimation of the recovered signal. It is shown that
the optimal SNR ratio of the injected signal is enhanced by and
the recovered parameters are consistent with the injected set. We present the
performance of this algorithm on linear and non-linear noise sources and
discuss its impact on astrophysical searches by gravitational wave detectors.Comment: 12 pages, 7 figure
Noise Reduction in Gravitational-wave Data via Deep Learning
With the advent of gravitational wave astronomy, techniques to extend the reach of gravitational wave detectors are desired. In addition to the stellar-mass black hole and neutron star mergers already detected, many more are below the surface of the noise, available for detection if the noise is reduced enough. Our method (DeepClean) applies machine learning algorithms to gravitational wave detector data and data from on-site sensors monitoring the instrument to reduce the noise in the time-series due to instrumental artifacts and environmental contamination. This framework is generic enough to subtract linear, non-linear, and non-stationary coupling mechanisms. It may also provide handles in learning about the mechanisms which are not currently understood to be limiting detector sensitivities. The robustness of the noise reduction technique in its ability to efficiently remove noise with no unintended effects on gravitational-wave signals is also addressed through software signal injection and parameter estimation of the recovered signal. It is shown that the optimal SNR ratio of the injected signal is enhanced by ∼21.6% and the recovered parameters are consistent with the injected set. We present the performance of this algorithm on linear and non-linear noise sources and discuss its impact on astrophysical searches by gravitational wave detectors
Torsion of the gallbladder: a case report
This is an Open Access article distributed under the terms of the Creative Commons Attribution Licens
TCT-17 Prospective, Multi-Center Evaluation of the DESolve Novolimus-Eluting Bioresorbable Coronary Scaffold: Imaging Outcomes and 3-Year Clinical and Imaging Results
TCT-37 Prospective, Multi-Center Evaluation of the DESolve Nx Novolimus-Eluting Bioresorbable Coronary Scaffold: First Report of One Year Clinical and Imaging Outcomes
Acute Geometric Changes of the Mitral Annulus after Coronary Occlusion: A Real-Time 3D Echocardiographic Study
We performed real-time 3D echocardiography in sixteen sheep to compare acute geometric changes in the mitral annulus after left anterior descending coronary artery (LAD, n=8) ligation and those after left circumflex coronary artery (LCX, n=8) ligation. The mitral regurgitation (MR) was quantified by regurgitant volume (RV) using the proximal isovelocity surface area method. The mitral annulus was reconstructed through the hinge points of the annulus traced on 9 rotational apical planes (angle increment=20°). Mitral annular area (MAA) and the ratio of antero-posterior (AP) to commissure-commissure (CC) dimension of the annulus were calculated. Non-planar angle (NPA) representing non-planarity of the annulus was measured. After LCX occlusion, there were significant increases of the MAA during both early and late systole (p<0.01) with significant MR (RV: 30±14 mL), while there was neither a significant increase of MAA, nor a significant MR (RV: 4±5 mL) after LAD occlusion. AP/CC ratio (p<0.01) and NPA (p<0.01) also significantly increased after LCX occlusion during both early and late systole. The mitral annulus was significantly enlarged in the antero-posterior direction with significant decrease of non-planarity compared to LAD occlusion immediately after LCX occlusion
The Vehicle, Fall 1984
Vol. 26, No. 1
Table of Contents
Thoughts on I-57Jim Caldwellpage 3
A Night Between Lonely and BlindJennifer K. Soulepage 4
What is Unnatural is Sometimes MagicAngelique Jenningspage 4
Cutting ClosenessBecky Lawsonpage 5
PhotoBrian Ormistonpage 6
The Sensuality of Corn One Week in AugustMichelle Mitchellpage 7
American MusicJim Caldwellpage 7
Water is WaitingMichael Kuopage 8
WhereJennifer K. Soulepage 8
The Fishing HoleJan Kowalskipage 9
Miller\u27s PondSue Gradypage 9
PhotoCathy Stonerpage 11
Young Man Reading To His LoverMaggie Kennedypage 11
ShellsChristopher R. Albinpage 12
In The ShadeJohn Fehrmannpage 12
FallLynanne Feilenpage 13
IndecisionDave L. Brydenpage 13
Dark Falls SoftlyAngelique Jenningspage 14
Not a Parked \u2757 Chevy in the Summer in the CountryMichelle Mitchellpage 20
BirdAnnie Heisepage 20
Clouds Created Only For Poets And Certain WomenJennifer K. Soulepage 21
SandGraham Lewispage 22
PhotoFred Zwickypage 23
Judgment CallCathy Moepage 23
I was hip that night Dan Hintzpage 24
A Sight Of WindDan Von Holtenpage 25
Tillard Isabel M. Parrottpage 26
The WidowMaggie Kennedypage 27
The SeparationMichelle Mitchellpage 27
The Garden Hose TrialMaggie Kennedypage 28
InterruptionsJennifer K. Soulepage 28
On Happening Across Jesus While Cleaning the BasementMaggie Kennedypage 29
GileonMichelle Mitchellpage 30
If My Father Were A Writer, He Would Still BuildAngelique Jenningspage 36
A Visit to Grandpa Gib\u27s HouseTammy Veachpage 37
For Having SeenAngelique Jenningspage 38
PhotoJudy Klancicpage 39
The Earth in BlueSusan J. Bielskypage 39
Things I Could Have SaidAngelique Jenningspage 40
AcrosticsAnnie Heisepage 40https://thekeep.eiu.edu/vehicle/1044/thumbnail.jp
The Vehicle, Fall 1984
Vol. 26, No. 1
Table of Contents
Thoughts on I-57Jim Caldwellpage 3
A Night Between Lonely and BlindJennifer K. Soulepage 4
What is Unnatural is Sometimes MagicAngelique Jenningspage 4
Cutting ClosenessBecky Lawsonpage 5
PhotoBrian Ormistonpage 6
The Sensuality of Corn One Week in AugustMichelle Mitchellpage 7
American MusicJim Caldwellpage 7
Water is WaitingMichael Kuopage 8
WhereJennifer K. Soulepage 8
The Fishing HoleJan Kowalskipage 9
Miller\u27s PondSue Gradypage 9
PhotoCathy Stonerpage 11
Young Man Reading To His LoverMaggie Kennedypage 11
ShellsChristopher R. Albinpage 12
In The ShadeJohn Fehrmannpage 12
FallLynanne Feilenpage 13
IndecisionDave L. Brydenpage 13
Dark Falls SoftlyAngelique Jenningspage 14
Not a Parked \u2757 Chevy in the Summer in the CountryMichelle Mitchellpage 20
BirdAnnie Heisepage 20
Clouds Created Only For Poets And Certain WomenJennifer K. Soulepage 21
SandGraham Lewispage 22
PhotoFred Zwickypage 23
Judgment CallCathy Moepage 23
I was hip that night Dan Hintzpage 24
A Sight Of WindDan Von Holtenpage 25
Tillard Isabel M. Parrottpage 26
The WidowMaggie Kennedypage 27
The SeparationMichelle Mitchellpage 27
The Garden Hose TrialMaggie Kennedypage 28
InterruptionsJennifer K. Soulepage 28
On Happening Across Jesus While Cleaning the BasementMaggie Kennedypage 29
GileonMichelle Mitchellpage 30
If My Father Were A Writer, He Would Still BuildAngelique Jenningspage 36
A Visit to Grandpa Gib\u27s HouseTammy Veachpage 37
For Having SeenAngelique Jenningspage 38
PhotoJudy Klancicpage 39
The Earth in BlueSusan J. Bielskypage 39
Things I Could Have SaidAngelique Jenningspage 40
AcrosticsAnnie Heisepage 40https://thekeep.eiu.edu/vehicle/1044/thumbnail.jp
Genome-wide linkage screen for testicular germ cell tumour susceptibility loci
A family history of disease is a strong risk factor for testicular germ cell tumour (TGCT). In order to identify the location of putative TGCT susceptibility gene(s) we conducted a linkage search in 237 pedigrees with two or more cases of TGCT. One hundred and seventy-nine pedigrees were evaluated genome-wide with an average inter-marker distance of 10 cM. An additional 58 pedigrees were used to more intensively investigate several genomic regions of interest. Genetic linkage analysis was performed with the ALLEGRO software using two model-based parametric analyses and a non-parametric analysis. Six genomic regions on chromosomes 2p23, 3p12, 3q26, 12p13-q21, 18q21-q23 and Xq27 showed heterogeneity LOD (HLOD) scores of greater than 1, with a maximum HLOD of 1.94 at 3q26. Genome-wide simulation studies indicate that the observed number of HLOD peaks greater than one does not differ significantly from that expected by chance. A TGCT locus at Xq27 has been previously reported. Of the 237 pedigrees examined in this study, 66 were previously unstudied at Xq27, no evidence for linkage to this region was observed in this new pedigree set. Overall, the results indicate that no single major locus can account for the majority of the familial aggregation of TGCT, and suggests that multiple susceptibility loci with weak effects contribute to the diseas
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