Acoustical Society of America’s Post

If you know the history of the Navy and Marine Corps since WWII, you know the history of CNA--you just might not realize it yet. I was excited to join the War on the Rocks Sailor Pulse podcast with Andrew Tenbusch to talk about what your Navy and Marine Corps FFRDC (CNA Corporation) does and why it matters. From counter-kamikaze tactics in the Pacific theater, to clearing port congestion in the Korean War, to identifying the Soviet bastion defense strategy in the Cold War, to measuring the effectiveness of counter-IED tactics in Iraq, CNA has been there to help the Navy/Marine Corps team do better. The ultimate goal is not elevating shareholder value or selling a widget. Our customer is the national interest, which is the ethos that animates analysts across the entire ecosystem of FFRDCs.

Excited to share my fascinating and thoughtful conversation with Joshua Tallis, Ph.D., scientific analyst to the Office of the Chief of Naval Operations. In this episode, we explore the critical role of the CNA Corporation and other Federally Funded Research and Development Centers (FFRDCs) and University Affiliated Research Centers (UARCs) in shaping the US Navy’s strategic and operational policies and how they fit into the broader think tank ecosystem. Dr. Tallis discusses how CNA has evolved from its beginnings in World War II—analyzing tactics to counter German U-boats in the Atlantic and Japanese kamikazes in the Pacific—to applying queuing theory to port operations in Busan during the Korean War, optimizing aviator recovery during Vietnam, leveraging open-source intelligence to divine the Soviet bastion defense strategy, and using statistical analysis to demonstrate the effectiveness of electronic warfare in counter-IED operations in Iraq. He also highlights the breadth of operations research and manpower analysis performed in support of the Navy and Marine Corps, the challenges of communicating research to decision-makers within a complex and adaptive system, and the importance of bottom-up ideas in addressing operational challenges. Dr. Tallis encourages sailors throughout the fleet to bring forward their insights during annual calls for studies, emphasizing that those closest to the issues often ask the most impactful questions.

On this episode of Sailor Pulse, Joshua Tallis, Ph.D. sits down with Andrew Tenbusch to discuss the unbiased role of Federally Funded Research and Development Centers in Naval decision-making. 

Our home (plant Earth), is called the Blue Marble for good reason. All Nations should understand this reality and the need for free and open access to Earth's Maritime Routes and choke points. In modern times Alfred T. Mahan effectively articulated his observations and is recognized for his expertise in the challenges of safely navigating our Oceans and Seas. He joins the Phoenicians, ancient Chinese, Norseman, and Matthew Fontaine Maury as Masters of Maritime navigation and conceptualizing Naval Warfare.

Deactivation of End-of-Life Batteries with Corey Love from the U.S. Naval Research Laboratory. This talk details the risks associated with end-of-life batteries and explores techniques for deactivating them when they reach the end of their useful life. Among these techniques, saltwater immersion shows promise, but it is hindered by slow deactivation and potential electrolyte release. https://lnkd.in/eSCm8yVW #BatterySafetySummit #batterysafety

The Marvel of Ancient Naval Warfare: The Trireme Picture a ship so formidable that it shaped the course of ancient naval warfare. This was the trireme, a marvel of engineering and strategy in the classical world. In this episode, we delve into the fascinating world of the ancient Greek trireme and uncover the secrets behind its incredible design and historical impact. From its unmatched speed and agility to its role in decisive battles, the trireme was a game-changer in naval warfare. Join us as we explore five key facts about this legendary warship and its legacy in ancient maritime history. #trireme #greeks

POMA This conference proceedings illustrates a practical methodology to improve covariance estimation using the principles of lucky signal processing and the cumulative coherence. https://lnkd.in/gNEWWxJh #acoustics United States Naval Research Laboratory

This conference proceedings illustrates a practical methodology to improve #covariance estimation using the principles of lucky #signalprocessing and the cumulative #coherence. Lucky processing, popularized in astro-photography, is a technique that increases signal quality by selectively keeping only a small fraction from a pool of potential snapshots. Cumulative coherence, a measure of how well a set of vectors is described by its subsets, provides the measure of “data quality” that enables the lucky processing. This approach is described practically and then applied to covariance estimation on an #acousticarray by taking a fixed duration sample of data and creating a dense set of snapshots with higher than usual overlap. From these densely sampled snapshots, the “luckiest” ones were found using cumulative coherence, and the covariance was averaged as normal. It was found that the lucky covariance estimate was successful at adaptive matched field processing and produced a less ambiguous processor output than the conventional estimator. The lucky covariance estimate had a higher estimated signal-to-noise ratio, especially when the source was at longer ranges from the #array. #mai #marineacoustics Acoustical Society of America #technology #innovation #sonar United States Naval Research Laboratory #acoustics #underwateracoustics #research https://lnkd.in/ej5MCmVB

POMA This paper presents analysis of soundscapes and noise interferometry from moored receivers in the vicinity of the New England Seamounts. https://lnkd.in/gvCThsbX #acoustics Naval Postgraduate School

Understanding and Analyzing Cavitation Erosion | Office of Naval Research awards project focused on damage and wear caused by repeated formation and collapse of vapor bubbles. Read Full Story: https://ow.ly/yUf750UkaiY #NavalResearch #CavitationErosion #MaterialsScience