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A Parametric Autoregressive Model for the Extraction of Electric Network Frequency Fluctuations in Audio Forensic Authentication

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Journal of Energy and Power Engineering 2016年第8期10卷 504-512页

作者： Tarek E. Gemayel martin bouchard School of Electrical Engineering and Computer Science University of Ottawa 800 King Edward Ottawa KIN 6N5 Canada

This paper proposes a new method for extracting ENF （electric network frequency） fluctuations from digital audio recordings for the purpose of forensic authentication. It is shown that the extraction of ENF components from audio recordings is realizable by applying a parametric approach based on an AR （autoregressive） model. The proposed method is compared to the existing STFT （short-time Fourier transform） based ENF extraction method. Experimental results from recorded electrical grid signals and recorded audio signals show that the proposed approach can improve the time resolution in the extracted ENF fluctuations and improve the detection of tampering with short alterations in longer audio recordings.

关键词： Audio forensic authentication electric network frequency fluctuations autoregressive modeling tampering anddiscontinuity detection.

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DUAL PERCEPTUALLY CONSTRAINED UNSCENTED KALMAN FILTER FOR ENHANCING SPEECH DEGRADED BY COLORED NOISE

DUAL PERCEPTUALLY CONSTRAINED UNSCENTED KALMAN FILTER FOR EN...

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第七届国际信号处理会议

作者： martin bouchard Rafik. A. Goubran School of Information Technology and Engineering University of Ottawa 800 King Edward Ottawa （Ontario） K1N 6N5 Canada Department of Systems and Computer Engineering Carleton University 1125 Colonel By Drive Ottawa Ontario K1S 5B6 Canada

A dual Unscented Kalman Filter (UKF) is applied to enhance speech signals degraded by colored noise. The speech model is a nonlinear one and is modeled by a neural network. The state vector and the

关键词： Unscented Kalman Filter speech enhancement perceptual masking

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Rosuvastatin‑Eluting Gold‑Nanoparticle‑Loaded Perivascular Wrap for Enhanced Arteriovenous Fistula Maturation in a Murine Model

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Advanced Fiber Materials 2023年第6期5卷 1986-2001页

作者： Carleigh Klusman Benjamin martin Joy Vanessa D.Perez Allan John R.Barcena Marvin R.Bernardino Erin Marie D.San Valentin Jossana A.Damasco Huckie C.Del Mundo Karem A.Court Biana Godin Gino martin Canlas Natalie Fowlkes Richard bouchard Jizhong Cheng Steven Y.Huang Marites P.Melancon Department of Interventional Radiology The University of Texas MD Anderson Cancer CenterHouston 77030USA Baylor College of Medicine Houston 77030USA College of Medicine University of the Philippines Manila1000 ManilaPhilippines Department of Nanomedicine Houston Methodist Research InstituteHouston 77030USA Department of Chemistry Lamar UniversityBeaumont 77710USA Department of Veterinary Medicine and Surgery The University of Texas MD Anderson Cancer CenterHouston 77030USA Department of Imaging Physics The University of Texas MD Anderson Cancer CenterHouston 77030USA Section of Nephrology Department of MedicineSelzman Institute for Kidney HealthBaylor College of MedicineHouston 77030USA The University of Texas MD Anderson Cancer Center UTHealth Houston Graduate School of Biomedical Sciences Houston 77030USA

Arteriovenous fistulas(AVFs)are a vital form of AV access for patients requiring hemodialysis,but they link to overall morbidity and mortality when they fail to *** most common cause of AVF non-maturation is neointimal hyperplasia(NIH).To minimize the deleterious effects of NIH,a perivascular wrap composed of polycaprolactone(PCL),rosuvastatin(ROSU),and gold nanoparticles(AUNPs)was *** study assessed the impact of ROSU-eluting,radiopaque resorbable perivascular wraps on pathologic NIH in a chronic kidney disease(CKD)rodent model of *** PCL wraps containing AuNPs and/or ROSU were monitored for in vitro tensile strength,AuNP release,ROSU elution,and effect on cellular *** wraps were then implanted around an AVF in a CKD rodent model for in vivo ultrasound(US)and micro-computed tomography(mCT)*** specimens were collected for histological *** viability was preserved in the presence of both AuNP-and ROSU-containing *** vitro release of ROSU and AuNPs correlated with in vivo findings of decreasing radiopacity on mCT over ***-loaded wraps had higher radiopacity(1270.0-1412.0 HU at week 2)compared with other wraps(103.5-456.0 HU),which decreased over *** addition of ROSU decreased US and histologic measurements of *** reduced NIH seen with ROSU-loaded perivascular wraps suggests a synergistic effect between mechanical support and anti-hyperplasia ***,AuNP loading increased wrap ***,our results show that AuNP-and ROSU-loaded PCL wraps induce AVF maturation and suppress NIH while facilitating optimal implanted device visualization.

关键词： Arteriovenous fistula Chronic kidney disease Nanoparticles Polycaprolactone Radiopacity Rosuvastatin

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文物建筑的现代诠释——蒙特利尔丽思卡尔顿酒店及公寓

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设计家 2014年第4期 86-89页

作者： Claude Provencher martin Vincent EugenioCarelli Jean-Luc Rémy Marius bouchard Stéphane Groleau Alexandre Parent v2com Provencher_Roy(建筑) Buz Design(酒店客房) Pati Xenos Design(公寓)

项目背景建于1912年的丽思卡尔顿酒店是蒙特利尔唯一一个从未改变其功能而存活至今的奢华酒店,酒店因其外立面和优雅的亚当风格的室内设计而出名,它是蒙特利尔的建筑瑰宝之一。虽然,酒店拥有无可否认的气质,但在过去数十年,它已经无法... 详细信息

项目背景建于1912年的丽思卡尔顿酒店是蒙特利尔唯一一个从未改变其功能而存活至今的奢华酒店,酒店因其外立面和优雅的亚当风格的室内设计而出名,它是蒙特利尔的建筑瑰宝之一。虽然,酒店拥有无可否认的气质,但在过去数十年,它已经无法满足游客的需求,因此酒店管理者希望对酒店做一些必要的修整以使其盈利。

关键词：蒙特利尔文物建筑酒店卡尔公寓诠释室内设计外立面

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