uncleflo
Registered since September 28th, 2017
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Tag selected: science.
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Why is Ukraine the West's Fault? Featuring John Mearsheimer
Saved by uncleflo on September 4th, 2022.
UnCommon Core: The Causes and Consequences of the Ukraine Crisis. John J. Mearsheimer, the R. Wendell Harrison Distinguished Service Professor in Political Science and Co-director of the Program on International Security Policy at the University of Chicago, assesses the causes of the present Ukraine crisis, the best way to end it, and its consequences for all of the main actors. A key assumption is that in order to come up with the optimum plan for ending the crisis, it is essential to know what caused the crisis. Regarding the all-important question of causes, the key issue is whether Russia or the West bears primary responsibility. Since its founding in 1890, the University of Chicago has been a destination for rigorous inquiry and field-defining research. This transformative academic experience empowers students and scholars to challenge conventional thinking in pursuit of original ideas.
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Interesting Sailboats: SOLAR PANELS ON SAILS
Saved by uncleflo on February 13th, 2022.
I don't sail but this idea interests me. Why couldn't a turbine of some description be fitted to the underside or even integrated into the keel to add to energy produced That is called an hydrogenerator and many oceanic sailboats use them. On the Vendee Globe, the non stop sailing race around the world most boats have two. They are expensive, with a price around 4/5000 euros. Finally somebody is working actively in what seems to be an obvious way to generate electric electricity on sailboats: Photo-voltaic sails. Till now the technology did not allow for panels flexible enough to allow that but on last years the technology has evolved a lot. It is already possible and it will not be expensive in the future. At least a sail manufacturer is working already actively on that, the UKsails France branch.
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This map shows where on Earth humans aren’t
Saved by uncleflo on February 13th, 2022.
A new map shows where people have the lowest impact—but are those the best places to protect? A newly created map reveals the “wildest” places on Earth—places where humans have the lowest impact. The findings could be used to support the push to set aside half of Earth for nature, its authors say. “If you want to know where in the world you can find a place that has not yet been transformed by agriculture, infrastructure, or settlements, [this map] is where to find it,” says Erle Ellis, a global ecologist at the University of Maryland Baltimore County who contributed to the analysis. “There is a very strong consensus on where these places are.” The map, published today in the journal Global Change Biology, knits together four independently developed models for determining where humanity leaves its fingerprints, each using different indicators of activity.
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Rust Removal Methods Explained
Saved by uncleflo on February 13th, 2022.
Common liquid rust removal methods explained with a little bit of science. Including Electrolysis, Vinegar, Citric Acid (Lemon Juice), Oxalic Acid (Molasses), Evapo-Rust, Phosphoric Acid (Coca Cola), and Hydrochloric Acid. A brief explanation of the chemical reaction involved with each method. The effect each method has on rust and good steel. The difference between rust dissolvers and rust convertors. Skip to : Vinegar 1:47; Citric Acid 3:49; Oxalic Acid 5:41; Evapo-Rust 7:20; Hydrochloric Acid 8:58; Rust Convertor 11:25; Phosphoric Acid 13:24; Electrolysis 14:56.
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National Geographic - YouTube
Saved by uncleflo on January 20th, 2022.
Inspiring people to care about the planet! National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible.
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Explosive Science - with Chris Bishop - YouTube
Saved by uncleflo on January 14th, 2022.
Distinguished Scientist, Ri Vice President and explosives expert Chris Bishop presents another action-packed demonstration lecture. Following on from his explorations of Chemistry and the world of Fireworks, Professor Bishop turns his attention to the use, origins and properties of explosives.
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Bird Flight
Saved by uncleflo on April 17th, 2021.
Exactly how birds acquired the ability to fly has baffled scientists for years. Archaeopteryx provided a starting point for speculation. Built like a dinosaur, but with wings, scientists guessed at how a hypothetical ancestor might have taken flight. Some scientists support the arboreal hypothesis (e.g., Feduccia 1996) and suggest that the ancestors of Archaeopteryx lived in trees and glided into flapping flight (Figure to the right). But others argue that the claws of Archaeopteryx weren't suited to climbing. So, others support the cursorial hypothesis (e.g., Burgers and Chiappe 1999) and suggest that these ancestors used their long, powerful legs to run fast with their arms outstretched, and were at some point lifted up by air currents and carried into flapping flight.
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How a Sail Gives Lift
Saved by uncleflo on April 10th, 2021.
How many times have you heard that a sail gives lift to drive a boat because, "the air travels faster on the lee side for it has farther to go than it does on the windward side. So the pressures are different and you get lift." Well, that is wrong! Even a perfectly flat thin airfoil, with the same distance on both sides, has lift when it is at an angle to the wind.
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Arvel Gentry | North Sails
Saved by uncleflo on April 10th, 2021.
In the first edition of the Art and Science of Sails, written by Tom Whidden, president of North Sails Group, LLC, and Michael Levitt, and published by St. Martin’s Press, the authors used Arvel Gentry’s now famous Bathtub Experiment to demonstrate the existence of Circulation, or a second force, that operates around an airfoil, like a sail, wing, or keel etc. Big picture: it’s the combined effort of these two forces that makes the wind speed up on the leeward side — and thus show low pressure — and slow down on the windward side of a sail — high pressure. Gentry was the Boeing engineer who first taught sailors aerodynamics. These diagrams first appeared in Gentry’s Sail magazine articles. In the Revised Edition, the authors used computer testing to show where the wind speeds up around a sail plan and where it slows down. And why and by how much? Nevertheless, Gentry’s experiment is the standard — still popular on the web — and it was left it out of the Revised Edition with trepidation, but we linked in the book to this web page.
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Fusion360 3D models - Sketchfab
Saved by uncleflo on December 20th, 2019.
Fusion360 3D models, Millions of models to discover. Fusion360 3D models ready to view, buy, and download for free. Explore art, games, cultural heritage, architecture, science and more. Enjoy Staff Pick recommendations every day. Follow your favorite creators, get inspired and publish your own creations.
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The FEniCS computing platform
Saved by uncleflo on October 26th, 2018.
FEniCS is a popular open-source (LGPLv3) computing platform for solving partial differential equations (PDEs). FEniCS enables users to quickly translate scientific models into efficient finite element code. With the high-level Python and C++ interfaces to FEniCS, it is easy to get started, but FEniCS offers also powerful capabilities for more experienced programmers. FEniCS runs on a multitude of platforms ranging from laptops to high-performance clusters.
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Advanced Hull Designs
Saved by uncleflo on September 14th, 2018.
BENTLEY YACHTS is proud to be the only yacht builder in the world to offer our demanding affluent clientele over 15 (fifteen) military proven hull forms that deliver nothing but an exhilarating yachting experience at all times, with unsurpassed riding comfort and seakeeping characteristics unmatched by any other yachts in the world today. So now, instead of bouncing like a cork in one of the industry's century old semi-planning, planning or displacement "floating tub" monohull designs, step into the future in one of our 15 plus unique BENTLEY YACHTS advanced military monohull and multi-hull designs. These well proven patented technologies were mostly developed for the world's top navies by our Team leading American and European marine scientists and engineers at a cost of Millions and Millions of Dollars. Some are also seen in limited commercial applications that require superior seakeeping. BENTLEY YACHTS brings for the first time those exciting hull technologies to the yachting world with total exclusivity. Would you agree that if our naval Team can design and build ships that fly (Ekranoplans), we certainly can design and build your very own customized yacht!
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3 Biases That Hijack Performance Reviews, and How to Address Them
Saved by uncleflo on June 22nd, 2018.
When we talk about bias, we often tie it to acts of discrimination or prejudice. But according to cognitive science, everybody, by virtue of having a brain that’s constantly seeking efficiency, is biased in some way — and not all biases make us actively malicious. The key is how we manage our biases. While biases can affect any of an organization’s talent decisions, they can be especially harmful when it comes to diversity and inclusion efforts. And there is perhaps no setting that shapes careers, salaries, and lives like annual performance evaluations. In a recent performance management summit we ran with over 100 large organizations, 57% of them said they weren’t taking any actions to address bias in performance reviews. One reason why may be a lack of shared language: In order to address biases, you first have to be able to label them. Research has found that several biases come up again and again when managers are evaluating a team member.
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Human Body Heat as a Source for Thermoelectric Energy Generation
Saved by uncleflo on May 31st, 2018.
The idea of converting human body heat into a form of usable energy has been targeted by scientists for years. A resting human male gives off roughly 100-120 Watts of energy. A very small fraction of this can be utilized by a thermoelectric device to power wearable devices. As an example, Seiko's Thermic Watch managed to capture continuous a charge at only one microwatt, so there is certainly a viable market that has not yet blossomed. It being known that 80% of a typical human's body power is given off as heat, current technologies can only produce a few milliwatts of energy. This is not nearly enough to charge your iPhone at a power input of roughly 5 watts, and unfortunately this sort of efficiency may never be possible.
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Is a tomato a fruit or a vegetable?
Saved by uncleflo on May 6th, 2018.
The confusion about 'fruit' and 'vegetable' arises because of the differences in usage between scientists and cooks. Scientifically speaking, a tomato is definitely a fruit. True fruits are developed from the ovary in the base of the flower, and contain the seeds of the plant (though cultivated forms may be seedless). Blueberries, raspberries, and oranges are true fruits, and so are many kinds of nut. Some plants have a soft part which supports the seeds and is also called a 'fruit', though it is not developed from the ovary: the strawberry is an example. As far as cooking is concerned, some things which are strictly fruits, such as tomatoes or bean pods, may be called 'vegetables' because they are used in savoury rather than sweet cooking. The term 'vegetable' is more generally used of other edible parts of plants, such as cabbage leaves, celery stalks, and potato tubers, which are not strictly the fruit of the plant from which they come. Occasionally the term 'fruit' may be used to refer to a part of a plant which is not a fruit, but which is used in sweet cooking: rhubarb, for example. So, the answer to the question is that a tomato is technically the fruit of the tomato plant, but it's used as a vegetable in cooking.
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Dr. Gérald Oster
Saved by uncleflo on June 21st, 2017.
Gérald Oster is an Associate Professor at TELECOM Nancy, University of Lorraine since 2006. He is a member of the Inria Coast project-team. He has an expertise in distributed collaborative systems with a focus on content replication mechanisms and their applicability. He received his Ph.D. in Computer Science from Nancy University in 2005. During his Ph.D., he worked on verification of correctness of a family of optimistic replication mechanisms (operational transformation) dedicated to collaborative editing. He proposed a framework based on an automated theorem prover and several sets of verified transformation functions for multiple data types. He worked on the design and the implementation of a universal file synchronizer. He is one of the pioneers of the CRDT approach as he participated in the design of the WOOT algorithm that initiated researches on these distinctive data structures. He is currently investigating the limitations and the applicability in diverse domains of these novel replicated data structures. Gérald is or was involved in several research projects and participated in several technologies transfer-oriented projects.
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Transatomic - Let’s create abundant energy and a healthy world
Saved by uncleflo on July 14th, 2016.
The nuclear industry of the 1950s was defined by an inexhaustible optimism and rigorous scientific thinking. Anything was possible, and nuclear energy promised to power the world. Revolutionary designs were prolific. Today, however, this technological diversity has been narrowed, and the industry has become locked into one design: the light water reactor. We’re challenging this strategy and have returned to the beginning to explore another path, and another design – the molten salt reactor. This simple reactor design, updated with modern technology and materials, has the potential to revolutionize the nuclear industry.
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Nonlinear Systems Laboratory Homepage
Saved by uncleflo on April 5th, 2015.
The Nonlinear Systems Laboratory is headed by Professor Jean-Jacques Slotine. Members and affiliates. Videos of Some of Our Research. Books. Journal Articles.
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Diamond Properties
Saved by uncleflo on April 4th, 2015.
Choose virtually any characteristic of a material - electronic, structural, or optical - and the value associated with diamond will almost always be the most extreme: Diamond is invariably 'the biggest and the best'. The following is a table of the properties of diamond that render it so potentially useful across many fields of science (Ref. 'Synthetic Diamond - Emerging CVD Science and Technology', Spear and Dismukes, Wiley, NY, 1994).
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Ascension – Watch Online | Syfy
Saved by uncleflo on April 2nd, 2015.
A very interesting space TV series on SyFy. In 1963, the U.S. government launched a covert space mission sending hundreds of men, women and children on a century-long voyage aboard the starship Ascension to populate a new world.
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[New solar system documentary] Exploration of Sprite at The Edge of Space HD - YouTube
Saved by uncleflo on March 2nd, 2015.
A documentary about the effects of Sprite Lightnings, normal lightning, Halo's, sun radiation and Solar bursts. New solar system documentary Exploration of Sprite at The Edge of Space HD
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oceanclassrooms.com
Saved by uncleflo on February 8th, 2015.
Ocean Classrooms (OC) believes strongly that the health of our ocean relies on the young, motivated ocean scientists of our future. These scientists not only thirst to learn more about the ocean through research, but also they need to engage the public in their research and its outcomes. In today’s world, the ability to deliver your message has never been easier, but it is also a crowded market that competes for public attention. Social media has narrowed the scientist-to-public divide. The savvy use of social media can help disseminate a science and conservation message efficiently and bring about effective change that protects and improves the health of our ocean. Moreover, young scientists have more challenges competing for limited research funding because of less experience. Consequently, OC is investing in a grant opportunity for early career marine science researchers to help fund their work and to help disseminate their research through social media, as well as through tradition
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(CPCe) Coral Point Count with Excel Extensions Research Software | NSU Oceanographic Center
Saved by uncleflo on February 8th, 2015.
The CPCe (Coral Point Count with Excel extensions) program is a Windows-based software (PC use only) that provides a tool for the determination of coral cover using transect photographs. A specified number of spatially random points are distributed on a transect image and the features underlying the points are user-identified. Coverage statistics are then calculated and the results sent to Excel spreadsheets automatically.
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Nozzle Design
Saved by uncleflo on September 2nd, 2014.
A rocket engine uses a nozzle to accelerate hot exhaust to produce thrust as described by Newton's third law of motion. The amount of thrust produced by the engine depends on the mass flow rate through the engine, the exit velocity of the flow, and the pressure at the exit of the engine. The value of these three flow variables are all determined by the rocket nozzle design.
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Research Archive - The ALS Association
Saved by uncleflo on September 2nd, 2014.
ALS booth The ALS Association’s booth at the Society for Neuroscience 2004 show Information about progress on ALS proved to be an important highlight of the 2004 meeting of The Society for Neuroscience, including reports by ALSA-funded investigators worldwide. News included gene therapy developments, stem cell research, RNA silencing, and evidence for processes underlying ALS that could point the way to new therapies. The 25,000 scientists gathered in San Diego learned about ALS by choosing among two slide sessions and several different poster sessions detailing the many different approaches underway in ALS research. Several ALSA-funded investigators notably reported on tests with a variety of compounds in animals, emphasizing ALSA’s efforts in translational research. The amount of research presented on ALS after a decade of focused attention translated into a sizeable chunk of the meeting. ALSA’s science director Lucie Bruijn, Ph.D., said, “It is encouraging to see so many invest
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