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2,132 results on '"Levy, Mark"'

1. Controllable Music Production with Diffusion Models and Guidance Gradients

Author

Levy, Mark, Di Giorgi, Bruno, Weers, Floris, Katharopoulos, Angelos, and Nickson, Tom

Subjects
Computer Science - Sound, Computer Science - Machine Learning, Electrical Engineering and Systems Science - Audio and Speech Processing
Abstract

We demonstrate how conditional generation from diffusion models can be used to tackle a variety of realistic tasks in the production of music in 44.1kHz stereo audio with sampling-time guidance. The scenarios we consider include continuation, inpainting and regeneration of musical audio, the creation of smooth transitions between two different music tracks, and the transfer of desired stylistic characteristics to existing audio clips. We achieve this by applying guidance at sampling time in a simple framework that supports both reconstruction and classification losses, or any combination of the two. This approach ensures that generated audio can match its surrounding context, or conform to a class distribution or latent representation specified relative to any suitable pre-trained classifier or embedding model. Audio samples are available at https://machinelearning.apple.com/research/controllable-music

Published
2023

4. Mel Spectrogram Inversion with Stable Pitch

Author

Di Giorgi, Bruno, Levy, Mark, and Sharp, Richard

Subjects
Computer Science - Sound, Computer Science - Machine Learning, Computer Science - Multimedia, Electrical Engineering and Systems Science - Audio and Speech Processing
Abstract

Vocoders are models capable of transforming a low-dimensional spectral representation of an audio signal, typically the mel spectrogram, to a waveform. Modern speech generation pipelines use a vocoder as their final component. Recent vocoder models developed for speech achieve a high degree of realism, such that it is natural to wonder how they would perform on music signals. Compared to speech, the heterogeneity and structure of the musical sound texture offers new challenges. In this work we focus on one specific artifact that some vocoder models designed for speech tend to exhibit when applied to music: the perceived instability of pitch when synthesizing sustained notes. We argue that the characteristic sound of this artifact is due to the lack of horizontal phase coherence, which is often the result of using a time-domain target space with a model that is invariant to time-shifts, such as a convolutional neural network. We propose a new vocoder model that is specifically designed for music. Key to improving the pitch stability is the choice of a shift-invariant target space that consists of the magnitude spectrum and the phase gradient. We discuss the reasons that inspired us to re-formulate the vocoder task, outline a working example, and evaluate it on musical signals. Our method results in 60% and 10% improved reconstruction of sustained notes and chords with respect to existing models, using a novel harmonic error metric., Comment: 7 pages, 5 figures, Proceedings of the 23st International Society for Music Information Retrieval Conference, ISMIR 2022

Published
2022

6. Downbeat Tracking with Tempo-Invariant Convolutional Neural Networks

Author

Di Giorgi, Bruno, Mauch, Matthias, and Levy, Mark

Subjects
Computer Science - Sound, Computer Science - Machine Learning, Computer Science - Multimedia, Electrical Engineering and Systems Science - Audio and Speech Processing
Abstract

The human ability to track musical downbeats is robust to changes in tempo, and it extends to tempi never previously encountered. We propose a deterministic time-warping operation that enables this skill in a convolutional neural network (CNN) by allowing the network to learn rhythmic patterns independently of tempo. Unlike conventional deep learning approaches, which learn rhythmic patterns at the tempi present in the training dataset, the patterns learned in our model are tempo-invariant, leading to better tempo generalisation and more efficient usage of the network capacity. We test the generalisation property on a synthetic dataset created by rendering the Groove MIDI Dataset using FluidSynth, split into a training set containing the original performances and a test set containing tempo-scaled versions rendered with different SoundFonts (test-time augmentation). The proposed model generalises nearly perfectly to unseen tempi (F-measure of 0.89 on both training and test sets), whereas a comparable conventional CNN achieves similar accuracy only for the training set (0.89) and drops to 0.54 on the test set. The generalisation advantage of the proposed model extends to real music, as shown by results on the GTZAN and Ballroom datasets., Comment: 7 pages, 5 figures, Proceedings of the 21st International Society for Music Information Retrieval Conference, ISMIR 2020

Published
2021

10. Global access and patient safety in the transition to environmentally friendly respiratory inhalers: the Global Initiative for Asthma perspective

Author

Levy, Mark L, Bateman, Eric D, Allan, Keith, Bacharier, Leonard B, Bonini, Matteo, Boulet, Louis-Philippe, Bourdin, Arnaud, Brightling, Chris, Brusselle, Guy, Buhl, Roland, Chakaya, Muhwa Jeremiah, Cruz, Alvaro A, Drazen, Jeffrey, Ducharme, Francine M, Duijts, Liesbeth, Fleming, Louise, Inoue, Hiromasa, Ko, Fanny W S, Krishnan, Jerry A, Masekela, Refiloe, Mortimer, Kevin, Pitrez, Paulo, Salvi, Sundeep, Sheikh, Aziz, Reddel, Helen K, and Yorgancıoğlu, Arzu

Published
2023
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11. Managing central venous access during a health care crisis

Author

Chun, Tristen T, Judelson, Dejah R, Rigberg, David, Lawrence, Peter F, Cuff, Robert, Shalhub, Sherene, Wohlauer, Max, Abularrage, Christopher J, Anastasios, Papapetrou, Arya, Shipra, Aulivola, Bernadette, Baldwin, Melissa, Baril, Donald, Bechara, Carlos F, Beckerman, William E, Behrendt, Christian-Alexander, Benedetto, Filippo, Bennett, Lisa F, Charlton-Ouw, Kristofer M, Chawla, Amit, Chia, Matthew C, Cho, Sungsin, Choong, Andrew MTL, Chou, Elizabeth L, Christiana, Anastasiadou, Coscas, Raphael, De Caridi, Giovanni, Ellozy, Sharif, Etkin, Yana, Faries, Peter, Fung, Adrian T, Gonzalez, Andrew, Griffin, Claire L, Guidry, London, Gunawansa, Nalaka, Gwertzman, Gary, Han, Daniel K, Hicks, Caitlin W, Hinojosa, Carlos A, Hsiang, York, Ilonzo, Nicole, Jayakumar, Lalithapriya, Joh, Jin Hyun, Johnson, Adam P, Kabbani, Loay S, Keller, Melissa R, Khashram, Manar, Koleilat, Issam, Krueger, Bernard, Kumar, Akshay, Lee, Cheong Jun, Lee, Alice, Levy, Mark M, Lewis, C Taylor, Lind, Benjamin, Lopez-Pena, Gabriel, Mohebali, Jahan, Molnar, Robert G, Morrissey, Nicholas J, Motaganahalli, Raghu L, Mouawad, Nicolas J, Newton, Daniel H, Ng, Jun Jie, O'Banion, Leigh Ann, Phair, John, Rancic, Zoran, Rao, Ajit, Ray, Hunter M, Rivera, Aksim G, Rodriguez, Limael, Sales, Clifford M, Salzman, Garrett, Sarfati, Mark, Savlania, Ajay, Schanzer, Andres, Sharafuddin, Mel J, Sheahan, Malachi, Siada, Sammy, Siracuse, Jeffrey J, Smith, Brigitte K, Smith, Matthew, Soh, Ina, Sorber, Rebecca, Sundaram, Varuna, Sundick, Scott, Tomita, Tadaki M, Trinidad, Bradley, Tsai, Shirling, Vouyouka, Ageliki G, Westin, Gregory G, Williams, Michael S, Wren, Sherry M, Yang, Jane K, Yi, Jeniann, Zhou, Wei, Zia, Saqib, and Woo, Karen

Subjects
Patient Safety, Clinical Research, Health Services, Health and social care services research, 8.1 Organisation and delivery of services, Generic health relevance, Good Health and Well Being, Betacoronavirus, COVID-19, Catheterization, Central Venous, Coronavirus Infections, Cross-Sectional Studies, Delivery of Health Care, Integrated, Health Care Surveys, Health Services Needs and Demand, Host-Pathogen Interactions, Humans, Iatrogenic Disease, Infection Control, Pandemics, Pneumonia, Viral, Risk Assessment, Risk Factors, SARS-CoV-2, Central venous access, Central line teams, Iatrogenic injuries, Medical and Health Sciences, Cardiovascular System & Hematology
Abstract

ObjectiveDuring the COVID-19 pandemic, central venous access line teams were implemented at many hospitals throughout the world to provide access for critically ill patients. The objective of this study was to describe the structure, practice patterns, and outcomes of these vascular access teams during the COVID-19 pandemic.MethodsWe conducted a cross-sectional, self-reported study of central venous access line teams in hospitals afflicted with the COVID-19 pandemic. To participate in the study, hospitals were required to meet one of the following criteria: development of a formal plan for a central venous access line team during the pandemic; implementation of a central venous access line team during the pandemic; placement of central venous access by a designated practice group during the pandemic as part of routine clinical practice; or management of an iatrogenic complication related to central venous access in a patient with COVID-19.ResultsParticipants from 60 hospitals in 13 countries contributed data to the study. Central venous line teams were most commonly composed of vascular surgery and general surgery attending physicians and trainees. Twenty sites had 2657 lines placed by their central venous access line team or designated practice group. During that time, there were 11 (0.4%) iatrogenic complications associated with central venous access procedures performed by the line team or group at those 20 sites. Triple lumen catheters, Cordis (Santa Clara, Calif) catheters, and nontunneled hemodialysis catheters were the most common types of central venous lines placed by the teams. Eight (14%) sites reported experience in placing central venous lines in prone, ventilated patients with COVID-19. A dedicated line cart was used by 35 (59%) of the hospitals. Less than 50% (24 [41%]) of the participating sites reported managing thrombosed central lines in COVID-19 patients. Twenty-three of the sites managed 48 iatrogenic complications in patients with COVID-19 (including complications caused by providers outside of the line team or designated practice group).ConclusionsImplementation of a dedicated central venous access line team during a pandemic or other health care crisis is a way by which physicians trained in central venous access can contribute their expertise to a stressed health care system. A line team composed of physicians with vascular skill sets provides relief to resource-constrained intensive care unit, ward, and emergency medicine teams with a low rate of iatrogenic complications relative to historical reports. We recommend that a plan for central venous access line team implementation be in place for future health care crises.

Published
2020

14. Global inequalities in children with asthma

Author

Lenney, Warren, primary, Bush, Andrew, additional, Fitzgerald, Dominic A., additional, Forno, Erick, additional, Levy, Mark L., additional, Hong, Jianguo, additional, Narang, Indra, additional, Singh, Varinder, additional, Soto-Martinez, Manuel E., additional, and Zar, Heather, additional

Published
2023
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16. Is Inhaler Technique Adequately Assessed and Reported in Clinical Trials of Asthma and Chronic Obstructive Pulmonary Disease Therapy? A Systematic Review and Suggested Best Practice Checklist

Author

Dekhuijzen, P.N. Richard, Levy, Mark L., Corrigan, Chris J., Hadfield, Ruth M., Roche, Nicolas, Usmani, Omar S., Barnes, Peter J., Scullion, Jane E., Lavorini, Federico, Corbetta, Lorenzo, Kocks, Janwillem W.H., Cosio, Borja G., Buhl, Roland, and Pedersen, Søren E.

Published
2022
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18. Global Initiative for Asthma Strategy 2021: Executive Summary and Rationale for Key Changes

Author

Reddel, Helen K., Bacharier, Leonard B., Bateman, Eric D., Brightling, Christopher E., Brusselle, Guy G., Buhl, Roland, Cruz, Alvaro A., Duijts, Liesbeth, Drazen, Jeffrey M., FitzGerald, J. Mark, Fleming, Louise J., Inoue, Hiromasa, Ko, Fanny W., Krishnan, Jerry A., Levy, Mark L., Lin, Jiangtao, Mortimer, Kevin, Pitrez, Paulo M., Sheikh, Aziz, Yorgancioglu, Arzu A., and Boulet, Louis-Philippe

Published
2022
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23. What you need to know about video production and the law

Author

Levy, Mark

Subjects
Copyright -- Laws, regulations and rules, Video production -- Laws, regulations and rules, Government regulation, Patent/copyright issue, Consumer news and advice, Electronics
Abstract

When you start any business, you should know the legalities of the business. It is difficult enough to set up a business with suitable equipment, personnel, infrastructure, marketing, and customers [...]

Published
2022

24. The Evolution of Popular Music: USA 1960-2010

Author

Mauch, Matthias, MacCallum, Robert M., Levy, Mark, and Leroi, Armand M.

Subjects
Physics - Physics and Society, Computer Science - Sound
Abstract

In modern societies, cultural change seems ceaseless. The flux of fashion is especially obvious for popular music. While much has been written about the origin and evolution of pop, most claims about its history are anecdotal rather than scientific in nature. To rectify this we investigate the US Billboard Hot 100 between 1960 and 2010. Using Music Information Retrieval (MIR) and text-mining tools we analyse the musical properties of ~17,000 recordings that appeared in the charts and demonstrate quantitative trends in their harmonic and timbral properties. We then use these properties to produce an audio-based classification of musical styles and study the evolution of musical diversity and disparity, testing, and rejecting, several classical theories of cultural change. Finally, we investigate whether pop musical evolution has been gradual or punctuated. We show that, although pop music has evolved continuously, it did so with particular rapidity during three stylistic "revolutions" around 1964, 1983 and 1991. We conclude by discussing how our study points the way to a quantitative science of cultural change., Comment: MS: 13 pages, 6 figures; SI: 15 pages, 7 figures

Published
2015
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25. Inclusive and differential measurements of spin correlation in top-antitop quark pairs at √s = 8 TeV using the ATLAS detector

Author

Levy, Mark

Subjects
539.7, QC Physics
Abstract

A measurement of the spin correlation strength in top-antitop pairs is presented, using protonproton collision data collected at the ATLAS detector with a centre of mass energy of √s = 8 TeV and an integrated luminosity of 20.3 fb\(^{-1}\). An inclusive measurement is made, as well as a differential measurement as a function of the top-antitop invariant mass. Additionally, these measurements are made both at detector level and unfolded to a parton level distribution. Selected events are required to have exactly two oppositely charged leptons (either electrons or muons), a large missing transverse energy and at least two hadronic jets, at least one of which must be tagged as originating from a b-quark. The azimuthal separation between the two charged leptons, Δφ, is used to measure the degree of spin correlation. The measured distribution is compared to a Standard Model prediction and a model with no spin correlation. It is found that the results all favour the Standard Model prediction over the uncorrelated model, with the data found to be several standard deviations away from the uncorrelated scenario.

Published
2016

36. Retrieval and annotation of music using latent semantic models

Author

Levy, Mark

Subjects
820.285, Computer Science, Electronic Engineering
Abstract

This thesis investigates the use of latent semantic models for annotation and retrieval from collections of musical audio tracks. In particular latent semantic analysis (LSA) and aspect models (or probabilistic latent semantic analysis, pLSA) are used to index words in descriptions of music drawn from hundreds of thousands of social tags. A new discrete audio feature representation is introduced to encode musical characteristics of automatically-identified regions of interest within each track, using a vocabulary of audio muswords. Finally a joint aspect model is developed that can learn from both tagged and untagged tracks by indexing both conventional words and muswords. This model is used as the basis of a music search system that supports query by example and by keyword, and of a simple probabilistic machine annotation system. The models are evaluated by their performance in a variety of realistic retrieval and annotation tasks, motivated by applications including playlist generation, internet radio streaming, music recommendation and catalogue search.

Published
2012

38. Do you need a model release?

Author

Levy, Mark

Subjects
Privacy, Rap music, Privacy issue, Consumer news and advice, Electronics
Abstract

Knowing when you need a model release form will protect you from future lawsuits. Use this guide to determine when a model release is warranted. Whether you're working on a [...]

Published
2021

39. Asthma: effect of excess short-acting β2-agonist (SABA) inhaler prescriptions on healthcare resource utilisation.

Author

Levy, Mark L, Capstick, Toby GD, and Antalffy, Thomas

Subjects
ASTHMATICS, PATIENT compliance, MEDICAL care costs, HOSPITAL costs, HOSPITAL admission & discharge, CORONERS
Abstract

This article discusses the impact of excess short-acting β2-agonist (SABA) inhaler prescriptions on healthcare resource utilization in the management of asthma. The authors argue that regular use of SABAs without inhaled corticosteroids can have dangerous adverse effects and lead to increased asthma attacks, healthcare utilization, and deaths. They present data from two studies that demonstrate higher healthcare resource utilization costs associated with high SABA prescriptions, including increased hospital admissions. The authors suggest implementing an anti-inflammatory reliever therapy approach using a combination inhaler to replace SABA prescriptions, which may reduce asthma admissions and overall healthcare resource utilization costs. They also emphasize the importance of considering patient outcomes and clinical cost-effectiveness in medicines management strategies. [Extracted from the article]

Published
2024
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44. Analysis of noncatheter-associated upper extremity deep venous thrombosis from the RIETE registry

Author

Monreal, Manuel, Decousus, Hervè, Prandoni, Paolo, Brenner, Benjamin, Barba, Raquel, Di Micco, Pierpaolo, Bertoletti, Laurent, Tzoran, Inna, Reis, Abilio, Bosevski, Marijan, Bounameaux, Henri, Malý, Radovan, Wells, Philip, Papadakis, Manolis, Agüero, R., Aibar, M.A., Alfonso, M., Aranda, R., Arcelus, J.I., Barba, R., Barrón, M., Barrón-Andrés, B., Bascuñana, J., Binetti, J., Blanco-Molina, A., Bueso, T., Cañas, I., Carmona, F., Chic, N., Culla, A., del Pozo, R., del Toro, J., Díaz-Pedroche, M.C., Díaz-Peromingo, J.A., Falgá, C., Fernández-Aracil, C., Fernández-Capitán, C., Fidalgo, M.A., Font, C., Font, L., Gallego, P., García, M.A., García-Bragado, F., Gómez, V., González, J., Grau, E., Grimón, A., Guirado, L., Gutiérrez, J., Hernández-Comes, G., Hernández-Blasco, L., Jara-Palomares, L., Jaras, M.J., Jiménez, D., Joya, M.D., Lecumberri, R., Lobo, J.L., López-Jiménez, L., López-Reyes, R., López-Sáez, J.B., Lorente, M.A., Lorenzo, A., Manrique-Abos, I., Marchena, P.J., Martín, M., Martín-Antorán, J.M., Martín-Martos, F., Monreal, M., Nieto, J.A., Nieto, S., Núñez, A., Núñez, M.J., Otalora, S., Otero, R., Pagán, B., Pedrajas, J.M., Pérez, G., Pérez, I., Pérez-Ductor, C., Peris, M.L., Porras, J.A., Reig, O., Riera-Mestre, A., Riesco, D., Rivas, A., Rodríguez-Dávila, M.A., Rosa, V., Rosillo-Hernández, E., Ruiz-Artacho, P., Ruiz-Giménez, N., Sahuquillo, J.C., Sala-Sainz, M.C., Sampériz, A., Sánchez, R., Sanz, O., Soler, S., Sopeña, B., Suriñach, J.M., Tolosa, C., Trujillo-Santos, J., Uresandi, F., Valero, B., Valle, R., Vela, J., Vidal, G., Villalta, J., Vanassche, T., Verhamme, P., Wells, P., Hirmerova, J., Malý, R., Salgado, E., Bertoletti, L., Bura-Riviere, A., Champion, K., Farge-Bancel, D., Hij, A., Mahé, I., Merah, A., Papadakis, M., Braester, A., Brenner, B., Tzoran, I., Antonucci, G., Barillari, G., Bilora, F., Ciammaichella, M., Dentali, F., Di Micco, P., Duce, R., Ferrazzi, P., Grandone, E., Lodigiani, C., Maida, R., Pace, F., Pesavento, R., Poggio, R., Prandoni, P., Rota, L., Tiraferri, E., Tonello, D., Tufano, A., Visonà, A., Zalunardo, B., Drucka, E., Kigitovica, D., Skride, A., Ramos, A.R., Ribeiro, J.L., Sousa, M.S., Bosevski, M., Zdraveska, M., Bounameaux, H., Erdmann, A., Mazzolai, L., Ney, B., Newton, Daniel H., Monreal Bosch, Manuel, Amendola, Michael, Wolfe, Luke, Perez Ductor, Cristina, Lecumberri, Ramón, and Levy, Mark M.

Published
2017
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45. A Multivitamin Mixture Protects against Oxidative Stress-Mediated Telomere Shortening.

Author

Levy, Mark A., Junqiang Tian, Gandelman, Mandi, Haojie Cheng, Tsapekos, Menelaos, Crego, Sara R., Maddela, Rolando, and Sinnott, Robert

Subjects
*VITAMINS, *TELOMERES, *POLYPHENOLS, *FIBROBLASTS, *CELL culture, *OXIDATIVE stress, *TREATMENT effectiveness, *DESCRIPTIVE statistics, *RESEARCH funding
Abstract

Telomeres are nucleotide repeat sequences located at the end of chromosomes that protect them from degradation and maintain chromosomal stability. Telomeres shorten with each cell division; hence telomere length is associated with aging and longevity. Numerous lifestyle factors have been identified that impact the rate of telomere shortening; high vitamin consumption has been associated with longer telomere length, whereas oxidative stress is associated with telomere shortening. In this paper, we sought to determine if a multivitamin mixture containing both vitamins and a blend of polyphenolic compounds, could reduce telomere shortening consequent to an oxidative stress (10 uM H2O2 for 8 weeks) in a primary fibroblast cell culture model. Under conditions of oxidative stress, the median and 20th percentile telomere length were significantly greater (p < 0.05), and the percentage of critically short telomeres (<3000 bp) was significantly less (p < 0.05) in cells treated with the multivitamin mixture at 4, 15 and 60 ug/ml compared to control (0 ug/ml). Median and 20th percentile telomere shortening rate was also reduced under the same conditions (p < 0.05). Taken together, these findings demonstrate that the multivitamin mixture protects against oxidative stress-mediated telomere shortening in cell culture, findings which may have implications in human health. [ABSTRACT FROM AUTHOR]

Published
2024
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47. Should you hire union?

Author

Levy, Mark and Zelichenko, Roman

Subjects
Consumer news and advice, Electronics, Screen Actors Guild, American Federation of Television and Radio Artists
Abstract

Your decision to work with SAG-AFTRA or other unions will change how you run your production. Should you hire a union cast and crew? New York labor attorney Wendy LaManque [...]

Published
2020

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