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Mirage
The desert's no place for ocean-dwelling Kampii like Aluna and Hoku, especially now that Aluna's secretly started growing her tail.
Book
PHOTOGRAPHY IN THE WHITE SEA
After graduating with a master's degree in marine biology from Lomonosov Moscow State University in 2007, I joined the White Sea Biological Station in Primorskiy, Russia, as a diver assistant - effectively working as a kind of undersea technician. The station, a research centre based on the Karelian coast of the White Sea, at the edge of the polar circle, is part of Moscow State University. In 2011, for example, the BBC Science Focus magazine paid me for a double-page spread of sea-angel photographs.
Journal Article
The war beneath
\"Living and working underwater can be a dangerous thing. First the bulkheads sweat, then there's a trickle of water, and then in an instant you're gone. The only thing left is a bloody pulp in the dark water and crushed bone fragments on the seafloor. And you can't bolt to the surface in an emergency... The Bends will get you. But that's not the worst. When you're living underwater and also working as a spy for your city, that's when things get really dangerous. Truman McClusky has been out of the intelligence business for years, working the kelp farms and helping his city Trieste flourish on the shallow continental shelf just off the coast of Florida. Until his former partner shows up, that is, steals a piece of valuable new technology and makes a mad dash into the Atlantic. Before he knows it, Mac ends up back in the game, chasing the spy to not only recapture the tech, but to kill his former friend. But when he learns the grim truth behind the theft, it sends his stable life into turmoil and plunges him into an even deadlier mission: evade the submarines of hostile foreign powers, escape assassins, and forge through the world's oceans at breakneck pace on a daring quest to survive, with more lethal secrets than he thought possible in his pocket. The future of the city depends on McClusky... if he can make it back home.\"-- Provided by publisher.
Book
A bionic stretchable nanogenerator for underwater sensing and energy harvesting
Soft wearable electronics for underwater applications are of interest, but depend on the development of a waterproof, long-term sustainable power source. In this work, we report a bionic stretchable nanogenerator for underwater energy harvesting that mimics the structure of ion channels on the cytomembrane of electrocyte in an electric eel. Combining the effects of triboelectrification caused by flowing liquid and principles of electrostatic induction, the bionic stretchable nanogenerator can harvest mechanical energy from human motion underwater and output an open-circuit voltage over 10 V. Underwater applications of a bionic stretchable nanogenerator have also been demonstrated, such as human body multi-position motion monitoring and an undersea rescue system. The advantages of excellent flexibility, stretchability, outstanding tensile fatigue resistance (over 50,000 times) and underwater performance make the bionic stretchable nanogenerator a promising sustainable power source for the soft wearable electronics used underwater.
Flexible devices such as solar cells and nanogenerators are attractive for powering wearable electronics, but waterproof capabilities would extend applications. Here the authors report a bionic stretchable nanogenerator that is capable of harvesting energy and multi-position motion monitoring underwater.
Journal Article
Sunken lands : a journey through flooded kingdoms and lost worlds
An immersive travelogue exploring the pervasive mythology and emotional resonance of flooded places, at a time when the waters are rising once more.
Book
Self-powered multifunctional sensing based on super-elastic fibers by soluble-core thermal drawing
The well-developed preform-to-fiber thermal drawing technique owns the benefit to maintain the cross-section architecture and obtain an individual micro-scale strand of fiber with the extended length up to thousand meters. In this work, we propose and demonstrate a two-step soluble-core fabrication method by combining such an inherently scalable manufacturing method with simple post-draw processing to explore the low viscosity polymer fibers and the potential of soft fiber electronics. As a result, an ultra-stretchable conductive fiber is achieved, which maintains excellent conductivity even under 1900% strain or 1.5 kg load/impact freefalling from 0.8-m height. Moreover, by combining with triboelectric nanogenerator technique, this fiber acts as a self-powered self-adapting multi-dimensional sensor attached on sports gears to monitor sports performance while bearing sudden impacts. Next, owing to its remarkable waterproof and easy packaging properties, this fiber detector can sense different ion movements in various solutions, revealing the promising applications for large-area undersea detection.
Though thermal drawing methods are attractive for fabricating fiber-based sensor devices, existing methods allow limited access to low viscosity and low modulus materials. Here, the authors demonstrate a two-step soluble-core fiber fabrication method with wide applicability to soft polymer materials.
Journal Article
Horizon
Aluna and Hoku, Kampii from the City of Shifting Tides, and their friends, Equian Dash and winged Aviar Calli, are determined to stop a war. The maniacal ex-scientist Karl Strand is planning to conquer the world with his enormous army of tech-enhanced soldiers-- unless the four friends can get to Strand first. Aluna's plan is dangerous: pose as Upgraders and infiltrate the army. But the enemy isn't what they expected and the strategy begins to crumble. When the friends are torn apart by conflicting allegiances, their slim chance of avoiding war seems to disappear completely. For Aluna and Hoku, what began as a quest to save their own people has become a mission to save the world. But do Aluna and her friends have any hope of defeating Strand if they can't take him on together?
Book
Hidden heatwaves and severe coral bleaching linked to mesoscale eddies and thermocline dynamics
The severity of marine heatwaves (MHWs) that are increasingly impacting ocean ecosystems, including vulnerable coral reefs, has primarily been assessed using remotely sensed sea-surface temperatures (SSTs), without information relevant to heating across ecosystem depths. Here, using a rare combination of SST, high-resolution in-situ temperatures, and sea level anomalies observed over 15 years near Moorea, French Polynesia, we document subsurface MHWs that have been paradoxical in comparison to SST metrics and associated with unexpected coral bleaching across depths. Variations in the depth range and severity of MHWs was driven by mesoscale (10s to 100s of km) eddies that altered sea levels and thermocline depths and decreased (2007, 2017 and 2019) or increased (2012, 2015, 2016) internal-wave cooling. Pronounced eddy-induced reductions in internal waves during early 2019 contributed to a prolonged subsurface MHW and unexpectedly severe coral bleaching, with subsequent mortality offsetting almost a decade of coral recovery. Variability in mesoscale eddy fields, and thus thermocline depths, is expected to increase with climate change, which, along with strengthening and deepening stratification, could increase the occurrence of subsurface MHWs over ecosystems historically insulated from surface ocean heating by the cooling effects of internal waves.
Hidden marine heatwaves, associated with ocean eddies that modulate undersea internal waves, threaten coastal ecosystems by driving unexpected sub-surface heating and severe coral bleaching and mortality across depths.
Journal Article
The light at the bottom of the world
Teenaged Leyla McQueen, who lives beneath the ruins of a submerged London in 2099, joins a prestigious submersible race in the hope of clearing her father's name before encountering government corruption and a hidden world.
Book
Overview and Assessment of HVDC Current Applications and Future Trends
High voltage direct current (HVDC) technology has begun to gather a high degree of interest in the last few decades, showing a fast evolution of achievable voltage levels, transfer capacities, and transmission lengths. All these changes occurred in a context in which power system applications are highly dependent on HVDC technologies such as energy generation from renewable sources (e.g., energy generated in offshore wind power plants), power exchanges between asynchronous networks, submarine cables, and long-length transmission overhead lines have become more common worldwide. This paper tries to summarize the current state of HVDC technologies, both voltage-source converters and current-source converters, the main components of converter substations, control strategies, key challenges arising from their use, as well as the future prospects and trends of HVDC applications. This paper represents the first step in setting the background information for analyzing the impact of a VSC-HVDC connection on the stability of the Romanian transmission network during steady-state and dynamic operation.
Journal Article