BACKGROUND AND PURPOSE:

Intracranial epidermoids temporal bone cholesteatomas, and head and neck epidermal inclusion cysts are typically slow-growing, benign conditions arising from ectodermal tissue. They exhibit increased signal on DWI. While much of the imaging literature describes these lesions as showing diffusion restriction, we investigated these qualitative signal intensities and interpretations of restricted diffusion with respect to normal brain structures. This study aimed to quantitatively evaluate the ADC values and histogram features of these lesions.

BACKGROUND AND PURPOSE:

There has been a distinction made in the 2001 Canadian C-Spine Rule regarding patients 65 and older and younger than 65 years of age as far as indications for cervical spine CT scanning. We sought to determine if there are differences in the symptoms, mechanisms of injury, fracture locations, and types that are still relevant in 2024.

BackgroundBetween 2003 and 2018, incident prescriptions of beta-blockers for anxiety increased substantially, particularly for young adults. National Institute for Health and Care Excellence guidance for anxiety does not recommend beta-blockers, probably due to a lack of evidence to support such use. Recent reports have highlighted the potential risks of beta-blockers.AimTo understand when and why GPs prescribe beta-blockers for people with anxiety.Design and settingIn-depth interviews with 17 GPs in Bristol and the surrounding areas.MethodInterviews were held by telephone or video call. A topic guide was used to ensure consistency across interviews. Interviews were audio-recorded, transcribed verbatim, and analysed thematically.ResultsMany GPs viewed beta-blockers as ‘low risk’, particularly for young adults. Some GPs viewed beta-blockers as an alternative to benzodiazepines, acting quickly and not leading to dependence. GPs reflected that some patients appeared to want an ‘immediate fix’ to their symptoms, which GPs thought beta-blockers could potentially offer. This is salient in light of substantial waiting lists for talking therapies and delays in antidepressants taking effect. GPs described how some patients seemed more willing to try beta-blockers than antidepressants, as patients did not perceive them as ‘mental health drugs’ and therefore viewed them as potentially more acceptable and less stigmatising. Further, GPs viewed beta-blockers as ‘patient-led’, with patients managing their own dose and frequency, without GP input.ConclusionMany GPs believe that beta-blockers have a role to play in the management of anxiety. Given recent increases in the prescribing of these drugs in primary care, there is a need to assess their safety and effectiveness as a treatment for people with anxiety disorders.

The usual challenges of conducting primary care research, including randomized trials, have been exacerbated, and new ones identified, during the COVID-19 pandemic. HOMER (Home versus Office for Medication Enhanced Recovery; subsequently, Comparing Home, Office, and Telehealth Induction for Medication Enhanced Recovery) is a pragmatic, comparative-effectiveness research trial that aims to answer a key question from patients and clinicians: What is the best setting in which to start treatment with buprenorphine for opioid use disorder for this patient at this time? In this article, we describe the difficult journey to find the answer. The HOMER study began as a randomized trial comparing treatment outcomes in patients starting treatment with buprenorphine via induction at home (unobserved) vs in the office (observed, synchronous). The study aimed to enroll 1,000 participants from 100 diverse primary care practices associated with the State Networks of Colorado Ambulatory Practices and Partners and the American Academy of Family Physicians National Research Network. The research team faced unexpected challenges related to the COVID-19 pandemic and dramatic changes in the opioid epidemic. These challenges required changes to the study design, protocol, recruitment intensity, and funding conversations, as well as patience. As this is a participatory research study, we sought, documented, and responded to practice and patient requests for adaptations. Changes included adding a third study arm using telehealth induction (observed via telephone or video, synchronous) and switching to a comprehensive cohort design to answer meaningful patient-centered research questions. Using a narrative approach based on the Greek myth of Homer, we describe here the challenges and adaptations that have provided the opportunity for HOMER to thrive and find the way home. These clinical trial strategies may apply to other studies faced with similar cultural and extreme circumstances.

The aim of this work is to test whether the use of a transparent capsule affects the residual capsule weight after inhalation as a surrogate of the inhaled delivered dose for patients with non-reversible chronic airway disease. Researchers conducted an observational cross-sectional study with patients using a single-dose dry powder inhaler. The weight of the capsule was measured with a precision microbalance before and after inhalation. Ninety-one patients were included, of whom 63 (69.2%) used a transparent capsule. Inhalation with a transparent capsule achieved a weight decrease of 30.1% vs 8.6% for devices with an opaque capsule (P <0.001). These data reinforce the need to provide patients with mechanisms that verify the correct inhalation technique.

PURPOSE

The impact of digital health on medically underserved patients is unclear. This study aimed to determine the early impact of a digital innovation to grow quality care through an interprofessional care team (DIG IT) on the blood pressure (BP) and 10-year atherosclerotic cardiovascular disease (ASCVD) risk score of medically underserved patients.

PURPOSE

Despite being key to better health outcomes for patients from racial and ethnic minority groups, the proportion of underrepresented in medicine (URiM) physicians remains low in the US health care system. This study linked a nationally representative sample of family physicians (FPs) with Medicaid claims data to explore the relative contributions to care of Medicaid populations by FP race and ethnicity.

Vision is initiated by capturing photons in highly specialized sensory cilia known as the photoreceptor outer segment. Because of its lipid and protein composition, the outer segments are prone to photo-oxidation, requiring photoreceptors to have robust antioxidant defenses and high metabolic synthesis rates to regenerate the outer segments every 10 days. Both processes required high levels of glucose uptake and utilization. Retinitis pigmentosa is a prevalent form of inherited retinal degeneration characterized by initial loss of low-light vision caused by the death of rod photoreceptors. In this disease, rods die as a direct effect of an inherited mutation. Following the loss of rods, cones eventually degenerate, resulting in complete blindness. The progression of vision loss in retinitis pigmentosa suggested that rod photoreceptors were necessary to maintain healthy cones. We identified a protein secreted by rods that functions to promote cone survival, and we named it rod-derived cone viability factor (RdCVF). RdCVF is encoded by an alternative splice product of the nucleoredoxin-like 1 (NXNL1) gene, and RdCVF was found to accelerate the uptake of glucose by cones. Without RdCVF, cones eventually die because of compromised glucose uptake and utilization. The NXNL1 gene also encodes for the thioredoxin RdCVFL, which reduces cysteines in photoreceptor proteins that are oxidized, providing a defense against radical oxygen species. We will review here the main steps of discovering this novel intercellular signaling currently under translation as a broad-spectrum treatment for retinitis pigmentosa.

Background

In an evolving landscape of practices and policies, reviewing and incorporating the latest scientific evidence is necessary to ensure optimal clinical management for people with opioid use disorder. We provide a synopsis of the 2024 update of the 2018 National Guideline for the Clinical Management of Opioid Use Disorder, from the Canadian Research Initiative in Substance Matters.

New research shows that bystander CPR can substantially improve a person's odds of surviving a cardiac arrest while avoiding major brain damage, especially if given immediately.

Deepfakes can be close to indistinguishable from authentic video, and are now being used to perpetrate gender based abuse.

The post Deepfakes and gender based violence appeared first on rabble.ca.

BILL Shorten believes Labor can still win next Saturday’s election despite new opinion polling predicting his party will struggle.

RADIO shock jock fan Alan Jones unleashed on both sides of politics on Q&A last night — and came out in defence of Brexit.

"Kate Forbes still has her own leadership ambitions, setting them aside this Spring in the interest of party unity to accept Mr Swinney's offer to become Deputy First Minister."

New research to better understand the biological factors of suicidal behaviour Researchers at the University of Glasgow are embarking on two new PhD projects to better understand the impact that biological factors may have on suicidal behaviour.

A new Nordic-style Open Kindergarten will be trialled in part of Scotland ahead of a potential roll-out across the country.

A rural housing project branded as ‘truly transformative’ has been completed

A fire engine on its way to a callout has been involved in a collision with two cars on a road junction in Edinburgh.

There's one cat in the mouse, but five folks on the cast. Alex apologizes for rocks. Kelley learns things by watching mew. Chris is watching RPGmaniacs. Anna Marie has started embalming ship girls. And Pascal flips coins to decide whether or not to open a site indexing body mutilation in films.

The post RPG Cast – Episode 564: “Paws Is Best Lederhosen” appeared first on RPGamer.

Kelley's cat tosses a coin to The Witcher. Chris finds out there's just too many pigs. And Josh goes to Reddit, but all he finds is a meme.

The post RPG Cast – Episode 595: “I’m With the PS5, I Don’t Like Your Range Extender” appeared first on RPGamer.

Kelley goes down the Sega Strategy Game Rabbit Hole. Chris becomes a doily shill. And Josh wants Sega to release Valkyria Chronicles as many times as it takes until people like it!

The post RPG Cast – Episode 629: “Legally Distinct Ghost Rider” appeared first on RPGamer.

Kelley wants a Hello Kitty Skyrim mod. Chris visits Harrison Ford's favorite club on the citadel. Jason wants to fight along side the dude with a bucket on his head. RIP Palm OS.

The post RPG Cast – Episode 672: “Collecting Kids to Fill the Old Murder House” appeared first on RPGamer.

TWO banks have suspended London-based currency traders over the alleged manipulation of foreign exchange markets.

CNN anchor Anderson Cooper was flabbergasted Wednesday by a surrogate’s defense of Donald Trump, calling his explanation for the former president’s bombastic statements literal “bulls---.”

On AC360, former California Lieutenant Gov. Abel Maldonado, a Republican, said that Trump’s recent comments calling for the military to “handle” Democrats were simply his way of expressing his inner New Yorker. “He’s a fighter,” Maldonado added.

The conversation began when Cooper brought up Trump’s former chairman of the Joint Chiefs of Staff, Mark Milley, who, alongside other military leaders, have begun to warn of the dangers of re-electing the former president. Milley has called Trump a “fascist to his core.”

Read more at The Daily Beast.

Today in "person you already like says something you already agree with, but it’s still good to hear them say it" news, Arkane founder and im-simmy RPG studio WolfEye head Raphael Colantonio has spoken on Microsoft’s decision to shutter Prey (2017) studio Arkane Austin - alongside a handful of others - back in May.

Colantonio, who founded Arkane in 1999 and departed in 2017 to form Weird West studio WolfEye, recently chatted to Jeremy Peel for PC Gamer about Arkane’s closure, saying:

I think if you look a little bit, it's obvious that Arkane Austin was a very special group of people that have made some cool things and that could pull it off again. I think it was a decision that just came down to, 'We need to cut something.' Was it to please the investors, the stock market? They're playing a different game.

Read more

Part of the fun of Dragon Age's fantasy is that it's inconsistent - or at least, inconsistent by the standards of fantasy RPGs, which often break down into a million neatly organised and interlocking codex entries. It all rides on who you speak to. The humans believe one thing about the origins and workings of Thedas, the elves another, the qunari something else entirely. These differences are the basis for many factional disagreements and thus, many core series plot developments. According to former lead writer David Gaider, however, there's an "uber-plot" behind it all that may one day be resolved and bring the series to a close, assuming BioWare continue to refer to his original (and closely guarded) narrative documents.

Read more

The Elder Scrolls: Legends, the free-to-play card game set in Bethesda's fantasy world, has been removed from sale on Steam. Its servers will shut down for good on January 30th, 2025, after which it will no longer be playable. The closure comes five years after the game was last updated.

Read more

Put your hand up if you'd forgotten that every Assassin's Creed game is, strictly speaking, set in the present day. I know I had. That's not the actual distant past you're parkouring through. That isn't actual Renaissance architecture you're clambering on. It's a holographic Animus simulation, conjured from ancestral memories flash-frozen within your DNA - convenient, inasmuch as it means that any inconsistencies are your DNA's fault, not Ubisoft's. If the ledge-mantling animations are glitchy, that's simply because you have bad genes.

We can both be forgiven for losing sight of Assassin's Creed's modern day narrative frame. Ubisoft themselves have downplayed it since the era of Desmond Miles, the watery Peter Parker figure who served as puppetmaster protagonist for AC games up to Assassin's Creed 3. In Assassin's Creed Shadows, however, they're planning to bring back the modern day setting in a big way, though details are scanty.

Read more

Hori's latest addition to its controller lineup, the "Horipad Wireless for Steam," is now available for preorder on Amazon. After already releasing in Japan at the end of October, now the gamepad is coming to the US.

Read more

Halo Infinite recently received a big update in the form of Delta Arena, a playlist that features recreations of Halo 2's most popular maps and a special third-person mode. The true highlight, though, is yet to come. And that's through an entirely different Halo game: The Master Chief Collection. Soon enough, you'll be able to play Halo 2's lost E3 demo on it, thanks to some lovely modders.

Read more

Roblox is making changes in an attempt to keep younger players safe in the online platform. Beginning later this month, children under the age of 13 will no longer be able to search, discover or play unrated experiences within Roblox, and will be unable to access social hangout experiences.

Read more

Nostalgia, when you think about it, is bollocks. There has never been a better time than right this second – averaged out, and despite repeated attempts to the contrary, humanity has never been healthier, freer, or more enlightened by knowledge. It’s true of games too. For every by-committee platter of passionless map markers, there are thousands of more personal, more creative, more interesting works, all adding to the decades' worth of great stuff we can still play today.

What isn’t bollocks is the emotional pull that nostalgia, for all its lack of cold, hard reason, still manages to wield inside our warm, squishy brains. Hence, the centrepiece of Apex Legends’ Season 23 update is a mode that recreates the battle royale FPS as it was back in 2019, defaulting back to the original map and weapon arsenal while cutting the 26-strong legend roster to the earliest ten. It’s a Fortnite-style rolling back of the clock, and a passably enjoyable one, but also a reminder that the good old days weren’t always that good.

Read more

Could tower defence be the ultimate "it's Friday and I am here in body only" genre? I haven't really thought about it before, but Rift Riff's effusively laidback crowd control has me pondering those optimal moments in any tower defender when the incoming horde hits the flamer-MG triangle just right, and you can settle back comfortably into the role of clockwatcher.

Rift Riff encourages this behaviour by being nice to look at. Created by a trio of developers including Hidden Folks designer Adriaan de Jongh, it's a world of spacey, sun-carved mountains, forests and monoliths. The towers resemble the sacred architecture of Monument Valley, and the colour scheme and general ambience remind me of Cocoon. There's a demo, if you fancy it.

Read more

Great God Grove is, in a word, bonkers. I’ve stopped a small community from completing a blood ritual, played the role of matchmaker to a group of lonely hearts that involved organising a date with god, and plastered a statue with paint as part of a revolutionary movement to uplift the power of art. My time with GGG has been a pick n’ mix of colourful escapades, and together with its story of godly woes, striking art style, vacuum-based puzzle-solving, and nightmare-inducing puppet work, I’m now a die-hard LimboLane devotee.

Read more

A grand jury has formally charged a 22-year-old man with capital murder and rape in the death of Nabra Hassanen, who was killed on her walk back to a Virginia mosque.

The Fairfax County Circuit Court indicted Darwin Martinez-Torres of Sterling, Virginia, on Monday on four counts of capital murder for killing Nabra, who was with friends while they had a meal before Ramadan services. Dozens of people had gathered outside the courthouse today, chanting “Justice for Nabra.”

Virginia law has specific conditions for pursuing the death penalty, but the Associated Press reported that the grand jury’s indictment described in graphic detail how Nabra’s killing was grounds for a death penalty against Martinez-Torres. The indictment appears to acknowledge for the first time that the 17-year-old Muslim teen was raped. Under state law, the combination of a rape charge with a premeditated murder charge means the death penalty can be pursued.

Police have said that Martinez-Torres, who is an undocumented immigrant, got into a confrontation on June 18 with a group of teens walking back to the All Dulles Area Muslim Society after grabbing a late meal. He is accused of returning later and beating Nabra with a baseball bat. Police said Nabra’s body was later discovered in a pond. A search warrant affidavit revealed that Martinez-Torres admitted to killing Nabra and had led authorities to where he dumped her body, AP reported.

Nabra’s parents and Muslim advocates have said that Nabra’s death was motivated by hate, but police has said that they will not treat the killing as a hate crime. Instead, police have said it was a road rage incident.

“The reason this guy he hit my daughter is because she’s Muslim,” Nabra’s father Mahmoud Hassanen told WAMU. “Why [didn’t he] hit the boy who bothered him?”

Nabra’s father added that he hoped for the death penalty, while her mother said she wanted Martinez-Torres to serve life in prison.

“I just want people to remember her, and don’t forget her,” Mahmoud told WAMU. “I think nobody can forget her too, for what she did in her life.”

A preliminary hearing for Martinez-Torres reportedly turned emotional on Friday, with Nabra’s parents both shouting at the suspect in court. Nabra’s mother Sawsan Gazzar apparently threw a shoe at Martinez-Torres during the proceedings.

READ MORE: D.C. memorial for slain Muslim teen was set on fire, officials say

The post Man accused of killing Muslim teen indicted on capital murder charges appeared first on PBS NewsHour.

Watch Video | Listen to the Audio

JUDY WOODRUFF: And in the day’s other news: A federal judge in Hawaii struck down the Trump administration’s latest travel ban.

That temporarily blocks enforcement of the order nationwide, but the Justice Department says it will appeal. The ban extended to six mostly Muslim nations, plus North Korea and Venezuela.

Pennsylvania Congressman Tom Marino withdrew today from consideration to be President Trump’s drug czar. That followed an investigation by The Washington Post and CBS News. They found Marino was key in passing a 2016 law that limits the Drug Enforcement Administration’s ability to rein in opioid distribution.

A new verbal battle has broken out between the president and Republican Senator John McCain. It began last night in Philadelphia, when the Arizona senator and former Vietnam POW appeared to criticize Mr. Trump and his followers. He cited a list of failings.

SEN. JOHN MCCAIN, R-Ariz.: To fear the world we have organized and led for three-quarters-of-a-century, to abandon the ideals we have advanced around the globe for the sake of some half-baked, spurious nationalism cooked up by people who would rather find scapegoats than solve problems.

(CHEERING AND APPLAUSE)

JUDY WOODRUFF: The president answered by saying, “At some point, I fight back, and it won’t be pretty.”

In turn, McCain said, “I have faced tougher adversaries.”

In Afghanistan, Taliban bombings and shootings left at least 74 people dead today. The worst was Paktika province in the east, where two car bombs killed dozens, including the provincial police chief, and wounded more than 100 others. Taliban militants also staged attacks in the south and west of the country.

In Syria, militia forces backed by the U.S. say they have retaken the Islamic State group’s de facto capital. The city of Raqqa had been under ISIS control since 2014. The battle to recapture it began in June. Today, Kurdish-led fighters celebrated as they moved into the city center. The U.S. military said 90 percent of Raqqa has been taken, with pockets of militants remaining.

There’s word that U.S. airstrikes in Yemen killed dozens of Islamic State fighters on Monday. The strikes were apparently carried out by drones. The Pentagon says the targets were training camps for recruits.

In Northern Iraq, Kurdish forces withdrew from more territory today, as Iraqi government troops advanced. It came on the heels of the Kurds’ vote for independence. Federal forces and allied militia had already forced the Kurds to leave the area in and around Kirkuk and its oil fields.

Iraq’s prime minister said that paves the way for talks.

HAIDER AL-ABADI, Prime Minister, Iraq (through interpreter): I call for dialogue on the basis of partnership in one country and under the Constitution. The referendum is finished and has become a thing from the past. We hoped that they would cancel it, but we have finished it on the ground.

JUDY WOODRUFF: Meanwhile, the president of Iraqi Kurdistan, Massoud Barzani, insisted that the referendum will not be in vain.

Another 10,000 to 15,000 Rohingya Muslims fled Buddhist Myanmar for Bangladesh over the weekend. Drone video showed snaking lines of refugees making the trek to already crowded camps. Many told of villages torched by mobs and soldiers. Others said they were starved out of their homes.

Back in this country, a new fire broke out in the San Francisco Bay Area, just as crews had made major progress against other fires in Northern California. Thick smoke billowed from the new site early today, as it burned through forests in the Santa Cruz Mountains. Weary fire crews said they’re calling in more help.

ROB SHERMAN, Division Chief, Cal Fire: So, the idea is to hit it pretty hard with aircraft and then go ahead and hit it with the ground resources at the same time. We have had north winds, a lot of drying, and everything’s really, really dry. So it’s challenging.

JUDY WOODRUFF: In Southern California, yet another fire spread on Mount Wilson, about 25 miles north of downtown Los Angeles. It threatened a historic observatory and communications towers.

President Trump’s overall wealth has taken a hit, as his New York real estate loses some of its luster. Forbes ranks him 248 this year on its list of the 400 wealthiest Americans. That’s down nearly 100 points from last year. His estimated worth is $3.1 billion.

Microsoft co-founder Bill Gates again tops the list. He’s worth nearly $90 billion.

And on Wall Street, the Dow Jones industrial average traded above 23,000 for the first time. In the end, it gained 40 points to close at 22997. The Nasdaq fell a fraction, and the S&P 500 added one point.

The post News Wrap: Trump’s latest travel ban blocked by federal judge appeared first on PBS NewsHour.

A DWP employee who has been working in the welfare system for 42 years has shared some key advice for new claims for the likes of PIP and Attendance Allowance

Moin Hussain's debut feature film Sky Peals sees a man discover his father may be from outer space. Part sci-fi, part family drama, part coming-of-age tale, it is odd and otherworldly

Many people enjoy the experience of using AIs like ChatGPT or voice assistants like Alexa to find out information, but it turns out doing so makes it less likely you will spot inaccurate information

Computer code dating back to the 1960s is still vital to banks, airlines and governments, but programmers familiar with the language are in short supply. Now AI models are being trained to fill the skills gap

Archaeologists are using AI and US spy satellite imagery from the cold war to find ancient underground aqueducts that helped humans survive in the desert

Hurricane Helene hit a quartz mine in North Carolina that is key to global semiconductor production, which could impact the entire tech industry. Here is everything we know so far

Video Friday is your weekly selection of awesome robotics videos, collected by your friends at IEEE Spectrum robotics. We also post a weekly calendar of upcoming robotics events for the next few months. Please send us your events for inclusion.

IROS 2024: 14–18 October 2024, ABU DHABI, UAE

ICSR 2024: 23–26 October 2024, ODENSE, DENMARK

Cybathlon 2024: 25–27 October 2024, ZURICH

Humanoids 2024: 22–24 November 2024, NANCY, FRANCE

Enjoy today’s videos!

Not even ladders can keep you safe from quadruped robots anymore.

[ ETH Zürich Robot Systems Lab ]

Introducing Azi (right), the new desktop robot from Engineered Arts Ltd. Azi and Ameca are having a little chat, demonstrating their wide range of expressive capabilities. Engineered Arts desktop robots feature 32 actuators, 27 for facial control alone, and 5 for the neck. They include AI conversational ability including GPT-4o support which makes them great robotic companions.

[ Engineered Arts ]

Quadruped robots that individual researchers can build by themselves are crucial for expanding the scope of research due to their high scalability and customizability. In this study, we develop a metal quadruped robot MEVIUS, that can be constructed and assembled using only materials ordered through e-commerce. We have considered the minimum set of components required for a quadruped robot, employing metal machining, sheet metal welding, and off-the-shelf components only.

[ MEVIUS from JSK Robotics Laboratory ]

Thanks Kento!

Avian perching maneuvers are one of the most frequent and agile flight scenarios, where highly optimized flight trajectories, produced by rapid wing and tail morphing that generate high angular rates and accelerations, reduce kinetic energy at impact. Here, we use optimal control methods on an avian-inspired drone with morphing wing and tail to test a recent hypothesis derived from perching maneuver experiments of Harris’ hawks that birds minimize the distance flown at high angles of attack to dissipate kinetic energy before impact.

[ EPFL Laboratory of Intelligent Systems ]

The earliest signs of bearing failures are inaudible to you, but not to Spot . Introducing acoustic vibration sensing—Automate ultrasonic inspections of rotating equipment to keep your factory humming.

The only thing I want to know is whether Spot is programmed to actually do that cute little tilt when using its acoustic sensors.

[ Boston Dynamics ]

Hear from Jonathan Hurst, our co-founder and Chief Robot Officer, why legs are ideally suited for Digit’s work.

[ Agility Robotics ]

I don’t think “IP67” really does this justice.

[ ANYbotics ]

This paper presents a teleportation system with floating robotic arms that traverse parallel cables to perform long-distance manipulation. The system benefits from the cable-based infrastructure, which is easy to set up and cost-effective with expandable workspace range.

[ EPFL ]

It seems to be just renderings for now, but here’s the next version of Fourier’s humanoid.

[ Fourier ]

Happy Oktoberfest from Dino Robotics!

[ Dino Robotics ]

This paper introduces a learning-based low-level controller for quadcopters, which adaptively controls quadcopters with significant variations in mass, size, and actuator capabilities. Our approach leverages a combination of imitation learning and reinforcement learning, creating a fast-adapting and general control framework for quadcopters that eliminates the need for precise model estimation or manual tuning.

[ HiPeR Lab ]

Parkour poses a significant challenge for legged robots, requiring navigation through complex environments with agility and precision based on limited sensory inputs. In this work, we introduce a novel method for training end-to-end visual policies, from depth pixels to robot control commands, to achieve agile and safe quadruped locomotion.

[ SoloParkour ]

The water column is hazy as an unusual remotely operated vehicle glides over the seafloor in search of a delicate tilt meter deployed three years ago off the west side of Vancouver Island. The sensor measures shaking and shifting in continental plates that will eventually unleash another of the region’s 9.0-scale earthquakes (the last was in 1700). Dwindling charge in the instruments’ loggers threatens the continuity of the data.

The 4-metric-ton, C$8-million (US $5.8-million) remotely operated vehicle (ROV) is 50 meters from its target when one of the seismic science platforms appears on its sonar imaging system, the platform’s hard edges crystallizing from the grainy background like a surgical implant jumping out of an ultrasound image. After easing the ROV to the platform, operators 2,575 meters up at the Pacific’s surface instruct its electromechanical arms and pincer hands to deftly unplug a data logger, then plug in a replacement with a fresh battery.

This mission, executed in early October, marked an exciting moment for Josh Tetarenko, director of ROV operations at North Vancouver-based Canpac Marine Services. Tetarenko is the lead designer behind the new science submersible and recently dubbed it Jenny in homage to Forrest Gump, because the fictional character named all of his boats Jenny. Swapping out the data loggers west of Vancouver Island’s Clayoquot Sound was part of a weeklong shakedown to test Jenny’s unique combination of dexterity, visualization chops, power, and pressure resistance.

Jenny is only the third science ROV designed for subsea work to a depth of 6,000 meters.

By all accounts Jenny sailed through. Tetarenko says the worst they saw was a leaky O-ring and the need to add some spring to a few bumpers. “Usually you see more things come up the first time you dive a vehicle to those depths,” says Tetarenko.

Jenny’s successful maiden cruise is just as important for Victoria, B.C.–based Ocean Networks Canada (ONC), which operates the NEPTUNE undersea observatory. The North-East Pacific Time-series Undersea Networked Experiments array boasts thousands of sensors and instruments, including deep-sea video cameras, seismometers, and robotic rovers sprawled across this corner of Pacific. Most of these are connected to shore via an 812-kilometer power and communications cable. Jenny was custom-designed to perform the annual maintenance and equipment swaps that have kept live data streaming from that cabled observatory nearly continuously for the past 15 years, despite trawler strikes, a fault on its backbone cable, and insults from corrosion, crushing pressures, and fouling.

NEPTUNE remains one of the world’s largest installations for oceanographic science despite a proliferation of such cabled observatories since it went live in 2009. ONC’s open data portal has over 37,000 registered users tapping over 1.5 petabytes of ocean data—information that’s growing in importance with the intensification of climate change and the collapse of marine ecosystems.

Over the course of Jenny’s maiden cruise, her operators swapped devices in and out at half a dozen ONC sites, including at several of NEPTUNE’s five nodes and at one of NEPTUNE’s smaller sister observatories closer to Vancouver.

Inside Jenny

ROV Jenny aboard the Valour, Canpac’s 50-meter offshore workhorse, ahead of October’s NEPTUNE observatory maintenance cruise.Ocean Networks Canada

What makes Jenny so special?

• Jenny is only the third science ROV designed for subsea work to a depth of 6,000 meters.
• Motion sensors actively adjust her 7,000-meter-long umbilical cable to counteract topside wave action that would otherwise yank the ROV around at depth and, in rough seas, could damage or snap the cable.
• Dual high-dexterity manipulator arms are controlled by topside operators via a pair of replica mini-manipulators that mirror the movements.
• Each arm is capable of picking up objects weighing about 275 kilograms, and the ROV itself can transport equipment weighing up to 3,000 kg.
• 11 high-resolution cameras deliver 4K video, supported by 300,000 lumens of lighting that can be tuned to deliver the soft red light needed to observe bioluminescence.
• Dual multibeam sonar systems maximize visibility in turbid water.

Meghan Paulson, ONC’s executive director for observatory operations, says the sonar imaging system will be particularly invaluable during dives to shallower sites where sediments stirred up by waves and weather can cut visibility from meters to centimeters. “It really reduces the risk of running into things accidentally,” says Paulson.

To experience the visibility conditions for yourself, check out recordings of the live video broadcast from the NEPTUNE maintenance cruise. Tetarenko says that next year they hope to broadcast not only the main camera feed but also one of the sonar images.

3D video could be next, according to Canpac ROV pilot and Jenny codesigner, James Barnett. He says they would need to boost the computing power installed topside, to process that “firehose of data,” but insists that real-time 3D is “definitely not impossible.” Tetarenko says the science ROV community is collaborating on software to help make that workable: “3D imagining is kind of the very latest thing that’s being tested on lots of ROV systems right now, but nobody’s really there yet.”

More Than Science

Expansion of the cabled observatory concept is the more certain technological legacy for ONC and NEPTUNE. In fact, the technology has evolved beyond just oceanography applications.

ONC tapped Alcatel Submarine Networks (ASN) to design and build the Neptune backbone and the French firm delivered a system that has reliably delivered multigigabit Ethernet plus 10 kilovolts of direct-current electricity to the deep sea. Today ASN deploys a second-generation subsea power and communications networking solution, developed with the Norwegian international energy company Equinor.

ASN’s “Direct Current/Fiber Optic” or DC/FO system provides the 100-km backbone for the ARCA subsea neutrino observatory near Sicily, in addition to providing control systems for a growing number of offshore oil and gas installations. The latter include projects led by Equinor and BP where DC/FO networks drive the subsea injection of captured carbon dioxide and monitor its storage below the seabed. Future oil and gas projects will increasingly rely on the cables’ power supply to replace the hydraulic lines that have traditionally been used to operate machinery on the seafloor, according to Ronan Michel, ASN’s product line manager for oil and gas solutions.

Michel says DC/FO incorporates important lessons learned from the Neptune installation. And the latter’s existence was a crucial prerequisite. “The DC/FO solution would probably not exist if Neptune Canada would not have been developed,” says Michel. “It probably gave confidence to Equinor that ASN was capable to develop subsea power and coms infrastructure.”

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Zeiger is president of the Jack Miller Center, an educational venture to advance the history, documents and ideals we hold in common as Americans.As a nation, we are failing to prepare citizens for leadership in our constitutional republic. According to a September 2023 Pew Research Center study, 72...