Podcast appearances and mentions of guillermo valdes

In this episode, Mariana speaks with Vanda Felbab-Brown, a Brookings scholar of crime, conflict, and non-traditional security threats, and Guillermo Valdes, former head of Mexico's Center for Investigation and National Security, CISEN. They discuss the evolution of Mexico's cartels, the failure of the Mexican government to curtail their growth, and how they have diversified into other illegal and legal businesses. They also speak about how the lack of cooperation between the U.S. and Mexico—and the U.S. and China—is making it impossible to dismantle the Fentanyl supply chains and how Chinese and Mexican drug and wildlife trafficking activities are colliding, threatening various species and Mexico's biodiversity. 

A characterization method for low-frequency environmental noise in LIGO by Guillermo Valdes et al. on Monday 12 September We present a method to characterize the noise in ground-based gravitational-wave observatories such as the Laser Gravitational-Wave Observatory (LIGO). This method uses linear regression algorithms such as the least absolute shrinkage and selection operator (LASSO) to identify noise sources and analyzes the detector output versus noise witness sensors to quantify the coupling of such noise. Our method can be implemented with currently available resources at LIGO, which avoids extra coding or direct experimentation at the LIGO sites. We present two examples to validate and estimate the coupling of elevated ground motion at frequencies below 10 Hz with noise in the detector output. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.04452v1

Episode Notes This is Receding Horizons, Episode 2, where we talk about the exciting era of gravitational wave observations and multi-messenger astronomy. Brina Martinez is an undergraduate studying physics and computer science at the University of Texas Rio Grande Valley. She is currently a research assistant at the Center for Gravitational Wave Astronomy and in the Time Domain Astronomy Group operating the Cristina Torres Memorial Observatory, both under the mentorship of Dr. Mario Díaz. Brina is a published scientist. Her research focuses on characterizing noise sources intrinsic to the Laser Interferometer Gravitational-Wave Observatory, or LIGO. She has participated in a research experience for undergraduates at Louisiana State University under Dr. Guillermo Valdes and Dr. Gabriela González, and was a LIGO undergraduate fellow at Caltech under Dr. Derek Davis. Brina is a board member and resident astrophysicist at the South Texas Astronomical Society, as well as a board member and secretary at the Brownsville Chapter of the Society of Physics Students. She was the recipient of several awards including a scholarship from the Society for Advancement of Chicanos/Hispanics and Native Americans in Science, and a Victor M. Blanco Fellowship from the LIGO Lab and National Society of Hispanic Physicists. She is a gifted public speaker, and I've had the privilege to work with her (and make a lot of memories) during my time in Brownsville. Recorded on 26 February 2021. 00:00:00​ - Introduction 00:01:14​ - Excerpt from "Black Hole Blues" 00:02:48​ - Brina Martinez 00:15:53​ - LIGO 00:32:41​ - Gravitational wave events 00:44:06​ - Lacking belief and scientific leakage 00:52:37​ - Center for Gravitational Wave Astronomy 01:02:35​ - Multi-messenger observations 01:13:27​ - Scientific discovery 01:20:43​ - Daily life at Livingston 01:24:10​ - Analyzing thunderstorm noise 01:29:15​ - Black holes 01:32:49​ - Primordial gravitational waves 01:35:22​ - Unification 01:38:02​ - Singularities and horizons 01:45:03​ - Distorting spacetime 02:00:20​ - LISA 02:11:40​ - Future plans 02:14:38​ - Outro Related material: J. Levin, "Black Hole Blues and Other Songs from Outer Space", Bodley Head (2016), https://www.goodreads.com/book/show/27430326-black-hole-blues-and-other-songs-from-outer-space Gravitational Waves Summer School, L'École de Physique des Houches (2018), https://www.youtube.com/playlist?list=PLo9ufcrEqwWG7TrsxBN5f4L5eX_ZxEhka P. R. Saulson, "Fundamentals of Interferometric Gravitational Wave Detectors", World Scientific (1994), https://www.goodreads.com/book/show/11764374-fundamentals-of-interferometric-gravitational-wave-detectors G. González, "Gravitational Wave Astronomy", TDAG Astrophysics Seminar (2019), https://www.youtube.com/watch?v=4vCTNuINq6o&t=4040s&ab_channel=CTMObservatory PyCBC, Free and open software to study gravitational waves, https://pycbc.org/​ K. Mack, "The End of Everything (Astrophysically Speaking)", Scribner (2020), https://www.goodreads.com/book/show/52767659-the-end-of-everything B. Allen and J. D. Romano, "Detecting a Stochastic Background of Gravitational Radiation: Signal Processing Strategies and Sensitivities", Physical Review D 59, 102001 (1997), https://arxiv.org/pdf/gr-qc/9710117.pdf​ J. D. Romano and N. J. Cornish, "Detection Methods for Stochastic Gravitational-Wave Backgrounds: A Unified Treatment", Living Reviews in Relativity, 20:2 (2017), https://arxiv.org/pdf/1608.06889.pdf​ J. Baker, B. Brugmann, M. Campanelli, and C. O. Lousto, "Gravitational Waves from Black Hole Collisions via an Eclectic Approach", Classical and Quantum Gravity, Vol. 17, Number 20, L149 (2000), https://arxiv.org/pdf/gr-qc/0003027.pdf​ J. Baker, B. Brugmann, M. Campanelli, C. O. Lousto, and R. Takahashi, "Plunge Waveforms from Inspiralling Binary Black Holes", Physical Review Letters 87, 121103 (2001), https://arxiv.org/pdf/gr-qc/0102037.pdf​ J. Baker, M. Campanelli, and C. O. Lousto, "The Lazarus Project: A Pragmatic Approach to Binary Black Hole Evolutions", Physical Review D 65, 044001 (2005), https://arxiv.org/pdf/gr-qc/0104063.pdf​ G. Hallinan, A. Corsi, et al., "A Radio Counterpart to a Neutron Star Merger", Science, Vol. 358, Issue 6370, pp. 1579-1583 (2017), https://arxiv.org/pdf/1710.05435.pdf​ H.-Y. Chen et al., "Distance Measures in Gravitational-Wave Astrophysics and Cosmology", Classical and Quantum Gravity, Vol. 38, Number 5, 055010 (2021), https://arxiv.org/pdf/1709.08079.pdf​ B. Allen et al., "FINDCHIRP: An Algorithm for Detection of Gravitational Waves from Inspiraling Compact Binaries" Physical Review D 85, 122006 (2012), https://arxiv.org/pdf/gr-qc/0509116.p...​ K. Jani and A. Loeb, "Gravitational-Wave Lunar Observatory for Cosmology" (2020), https://arxiv.org/pdf/2007.08550.pdf​

Alan Bersin, a former Assistant Secretary for Homeland Security, and others warn against the destruction of confidence between the US and Mexico and call on all parties to invest in what they say is the most important relationship for both countries. Political scientist David Shirk of the University of San Diego and security analyst Guillermo Valdes of of Grupo de Economistas y Asociados of Mexico follow with presentations on the Merida Initiative and other programs aimed at enhancing security and building prosperity in North America. This is the fifth program in the nine-part “What’s Next for NAFTA?” series exploring the future of the North American economy, sponsored by the Center for US-Mexican Studies at UC San Diego. Series: "What's Next for NAFTA?" [Public Affairs] [Business] [Show ID: 32108]

Alan Bersin, a former Assistant Secretary for Homeland Security, and others warn against the destruction of confidence between the US and Mexico and call on all parties to invest in what they say is the most important relationship for both countries. Political scientist David Shirk of the University of San Diego and security analyst Guillermo Valdes of of Grupo de Economistas y Asociados of Mexico follow with presentations on the Merida Initiative and other programs aimed at enhancing security and building prosperity in North America. This is the fifth program in the nine-part “What’s Next for NAFTA?” series exploring the future of the North American economy, sponsored by the Center for US-Mexican Studies at UC San Diego. Series: "What's Next for NAFTA?" [Public Affairs] [Business] [Show ID: 32108]

Alan Bersin, a former Assistant Secretary for Homeland Security, and others warn against the destruction of confidence between the US and Mexico and call on all parties to invest in what they say is the most important relationship for both countries. Political scientist David Shirk of the University of San Diego and security analyst Guillermo Valdes of of Grupo de Economistas y Asociados of Mexico follow with presentations on the Merida Initiative and other programs aimed at enhancing security and building prosperity in North America. This is the fifth program in the nine-part “What’s Next for NAFTA?” series exploring the future of the North American economy, sponsored by the Center for US-Mexican Studies at UC San Diego. Series: "What's Next for NAFTA?" [Public Affairs] [Business] [Show ID: 32108]

Alan Bersin, a former Assistant Secretary for Homeland Security, and others warn against the destruction of confidence between the US and Mexico and call on all parties to invest in what they say is the most important relationship for both countries. Political scientist David Shirk of the University of San Diego and security analyst Guillermo Valdes of of Grupo de Economistas y Asociados of Mexico follow with presentations on the Merida Initiative and other programs aimed at enhancing security and building prosperity in North America. This is the fifth program in the nine-part “What’s Next for NAFTA?” series exploring the future of the North American economy, sponsored by the Center for US-Mexican Studies at UC San Diego. Series: "What's Next for NAFTA?" [Public Affairs] [Business] [Show ID: 32108]

Alan Bersin, a former Assistant Secretary for Homeland Security, and others warn against the destruction of confidence between the US and Mexico and call on all parties to invest in what they say is the most important relationship for both countries. Political scientist David Shirk of the University of San Diego and security analyst Guillermo Valdes of of Grupo de Economistas y Asociados of Mexico follow with presentations on the Merida Initiative and other programs aimed at enhancing security and building prosperity in North America. This is the fifth program in the nine-part “What’s Next for NAFTA?” series exploring the future of the North American economy, sponsored by the Center for US-Mexican Studies at UC San Diego. Series: "What's Next for NAFTA?" [Public Affairs] [Business] [Show ID: 32108]

Alan Bersin, a former Assistant Secretary for Homeland Security, and others warn against the destruction of confidence between the US and Mexico and call on all parties to invest in what they say is the most important relationship for both countries. Political scientist David Shirk of the University of San Diego and security analyst Guillermo Valdes of of Grupo de Economistas y Asociados of Mexico follow with presentations on the Merida Initiative and other programs aimed at enhancing security and building prosperity in North America. This is the fifth program in the nine-part “What’s Next for NAFTA?” series exploring the future of the North American economy, sponsored by the Center for US-Mexican Studies at UC San Diego. Series: "What's Next for NAFTA?" [Public Affairs] [Business] [Show ID: 32108]