uncleflo
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Why are Poseidon regs not DIR?
Saved by uncleflo on September 4th, 2022.
I understand the standardisation issues of DIR (I think) but DIR doesn't prescribe which reg you MUST have does it? Are Poseidons non DIR because GI3 had a spat with Poseidon (eg they wouldn't give him kit for an expidition) or is there a technical reason why GI3 considers them to be unsafe. And if the latter, why does the rest of the divng industry not also think they are unsafe? Or is it just plain old predudice against something diffrent?
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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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Research meets industry: A mine planning methodology for space | FNR – Luxembourg National Research Fund
Saved by uncleflo on September 4th, 2022.
When we wrote about Miguel Olivares Mendez in the 2017 edition of Spotlight on Young Researchers, the researcher was working on an FNR JUMP project, focussing on developing algorithms for autonomous drones. The robotics scientist has continued to build his research career in Luxembourg – 5 years later, Miguel is a Professor leading a research group with a focus on space robotics. Luxembourg start-up LuxAI, with their socially assistive robot QTrobot, has been making waves on an international level since it was created. The FNR has supported the project from its inception through the development of a prototype, helping bridge the gap between lab and commercialisation. We speak to LuxAI founders Dr Pouyan Ziafati and Dr Aida Nazarikhorram about the LuxAI journey so far; how QTrobot came to be and how parents can now have a QTrobot at home.
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Mozaik's Ultimate Post-Processing Guide | Mozaik UW
Saved by uncleflo on September 4th, 2022.
Digital photography has changed a lot in the last 20 years (duh). Camera technology has improved dramatically, but so has the software and machines that interpret the fruits of our photographic labors. Somewhere right before the 2010’s, we entered what I think of as the “Photoshop Era.” Adobe Photoshop was starting to gain popularity, and the expression, “photoshop it” started getting thrown around. In fact, in 2008, Merriam Webster added “photoshop” to their dictionary as a verb. What I think happened in this period was that photographers who had been working before the advent of programs like Photoshop pushed back on the whole concept. “Real photographers don’t use Photoshop.” You ever hear that one? I know that I have.
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5 Scuba Air Compressors [For Filling Tanks & On Boat]
Saved by uncleflo on June 13th, 2022.
Once diving becomes a serious hobby, you might be interested in buying your own compressor for filling your tanks. There is nothing wrong with dive shops, but there’s nothing like being able to fill up your tank wherever you are. Since the air in your tank is a matter of life or death, the air compressor for your scuba tank needs to provide you with clean pressurized air. When you choose a scuba air tank compressor, it needs to be specifically made for diving. Unless the compressor delivers clean breathing air at high pressures, you risk injury or death when you dive. This guide will help you understand how a compressor works, what makes a scuba air compressor different from a normal one, and what to look for when buying one. Many companies build compressors, but only a few manufacture breathing air compressors for scuba diving. We recommend the following
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Q&A: Radar Scanner Position - Attainable Adventure Cruising
Saved by uncleflo on February 13th, 2022.
Question: What is your preference regarding the best place to mount a radar antenna? As far as we can tell from the pictures of Morgan’s Cloud you have mounted yours on a pole aft. Our previous experience with radars tells us that the antenna should be as high and free as possible. Wouldn’t a radar antenna mounted on the mast just above the first spreaders give better range and a more detailed radar picture than if it were mounted lower? It also appears from the pictures that your antenna isn’t mounted in a way that makes it able to tilt so that it can compensate for heel of the boat when sailing. Answer: First off, we should say that we view radar as the most important piece of electronic equipment on Morgan’s Cloud—yes, more important than GPS, since we can find our way with a compass and sextant but we can’t see unlit objects at night or through fog—so we have given a lot of thought to the position and installation of our radar scanner. We prefer a pole mounted aft for the scanner over mast mounting.
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Anchoring: How much rope or chain should I let out? - NauticEd Sailing Blog
Saved by uncleflo on February 13th, 2022.
Anchoring, and getting it right is such an important topic that we thought we’d make this excerpt available for free in open space. Please enjoy how we dive into science and mathematics in these courses. If you like our style and how much knowledge you believe you could pick up in a full NauticEd course based on this little excerpt, consider take our full range of online sailing courses. Plus NauticEd has practical on-the-water training schools throughout the USA and Canada as well as other international locations. Check out, our two free sailing courses. NauticEd is a recognized sailing education body by the United States Coast Guard and can issue an official sailing license which is required by some countries to sail in their waters.
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Rocket Lab Completes 100th 3D-Printed Rocket Engine
Saved by uncleflo on February 12th, 2022.
You could call it one giant leap for 3D printing. California’s Rocket Lab just completed its 100th additive-printed Rutherford Engine as it targets cheaper rocket launches and space missions. The company has been on a tear since it created the world’s first 3D-printed, electric turbo-pump fed engine in 2013. Since then, it's launched 70 Rutherford engines to space with various companies—with the most recent one being on June 29. “The Rutherford engine has played an integral part in enabling Rocket Lab to make frequent and reliable launch a reality for small satellites,” Rocket Lab CEO Peter Beck said in a statement. “It’s a testament to our innovative design and manufacturing teams that we’ve achieved everything we set out to do in just a few short years; an entirely new type of rocket engine that delivers unmatched performance, boasts a proven record of 100% launch reliability and can be manufactured quickly and efficiently.” From here, the production is going to step up. The company plans to produce 200 Rutherford engines in the next year, on the back of improved 3D printing facilities in Huntington Beach, California. These engines will launch from Launch Complex 1 in New Zealand, and Launch Complex 2 at the Mid-Atlantic Regional Spaceport in Wallops Island, Virginia.
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Get an Anonymous Phone Number to Keep Your Identity Safe From Unwanted Calls | Hushed - Secure second and temporary phone number app
Saved by uncleflo on February 12th, 2022.
Have you ever wondered why you’re getting calls from random 1-800 telemarketers that you’ve never heard of? Or better yet, a text pops up asking you to click on a sketchy weblink? Obviously, you never asked for these companies to contact you. So, how does this happen? The reality is, every time you include your real phone number on a form, whether it’s at a local fair to win a trip to Hawaii, or on a social media profile, the companies receiving your information may well be farming out this information to other companies that, in turn, want to market products to you. Even if you’ve asked this first company NOT to share your info with other companies, someone who’s uninterested in your consent could still have gathered up your number through sketchy means. Now once your real number is out, consider that it could be placed on more call lists that these companies might sell to other companies that could well go on to sell them to even more companies. Based on this, you can begin to get a sense of how one small, innocuous form you filled out has now translated into texts from a Romanian area code – whose message insists you click a weblink to find out the link brings you to “someone who likes you”.
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M1 Mantus Anchor | Best Quick-Set Anchor| Mantus Marine
Saved by uncleflo on January 17th, 2022.
DIGS LIKE NO OTHER The Mantus Anchor is designed to penetrate dense, grassy bottoms and set with unparalleled holding power. When tested, our anchors set faster and deeper than any other tested anchor, including Rocna, Manson Supreme, Bulwagga, Fortress, Bruce, CQR and Danforth anchors. EASY TO STORE The Mantus Marine anchor lineup simply has the best boat anchors available, whether you are a long-range cruiser, racing or going out for a day sail. The Mantus quick-set anchor is stowable and breaks down for easy storage, so you can store one or two as spares without taking up much needed boat space.
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Solo Cave Diving and UK Sump Conditions | Cave Diving Group
Saved by uncleflo on January 17th, 2022.
The CDG believes that their cave diving procedures, developed by continuous improvement over 70 years, represent the best way to produce a well trained, intelligent and alert diver. Solo cave diving in the UK can trace its roots back to early dives by Graham Balcombe and Jack Sheppard in Swildon’s Hole in 1934. The procedures developed in the 30’s were formalised by the founding of the Cave Diving Group in 1946. A constant theme throughout the existence of the CDG has been to adapt materials and methods to the job in hand and to be open to continuous improvement. Cave diving has become extremely popular throughout the world. Florida is one of the regions blessed with many cave diving sites of outstanding quality and easy access. Consequently, there has been an explosion of popularity in cave diving in the USA. It is estimated that there are as many as 20,000 cave and cavern divers in Florida alone. These divers are organised into a number of national bodies including the National Speleological Society, Cave Diving Section and the National Association for Cave Diving. The generally agreed advice from this wealth of experience is that cave diving in the USA should be conducted by teams of divers in a buddy system and that solo cave diving introduces an unnecessary level of risk. Despite this advice the Cave Diving Group continues to recommend solo cave diving as the safer alternative for UK sump conditions. Why is that?
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From The Rough Sex Defence To Revenge Porn, Hereâs How The Domestic Abuse Bill Will Give Women Their Power Back | British Vogue
Saved by uncleflo on January 16th, 2022.
Last month marked a landmark moment for women in the UK: the Domestic Abuse Bill was finally signed into law. The legislation, granted royal assent on 29 April to become the Domestic Abuse Act, aims to extend greater protection to the millions of women at risk of abuse every day - from physical harm to coercive control and sexual violence. It also targets revenge porn and will clamp down on claims of 'rough sex gone wrong' in trials. Hailed as a once-in-a-generation opportunity to improve how England and Wales responds to domestic abuse, British Vogue takes a closer look at what the legislation actually means for women. In recent years the use of the 'rough sex' defence - arguing that consensual violence during sex had caused a victim's death - has been on the rise, increasing tenfold over a period of 20 years. Labour MP Harriet Harman and Conservative MP Mark Garnier introduced an amendment to the DA Bill to get the use of the defence banned. Now, it's an offence to deliberately strangle another person or perform an act that restricts a person's ability to breathe - and it carries a sentence of up to five years.
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AVON Seajet, Yamaha 63N / 62T, J700G engine jetrib Guide | YBW Forum
Saved by uncleflo on January 15th, 2022.
Seen Jeremy's williams jetrib guide and after 4 seasons of sorting out a now 20yo Avon jetrib, I decided to write down a maintenance to do (and how to) list of issues I had to address to keep a well maintained 20yo seawater jetrib in reasonable and reliable condition. Any corrections, additions, comments welcomed! First of all, a couple of links that will help identify parts or understand how the thing works! DISCLAIMER: anyone spent years on two stroke marine engines will find some of the following boring, apologies, I’m simply trying to show the whole process!
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Oxygen concentrator | ScubaBoard
Saved by uncleflo on January 13th, 2022.
Forum topic about creating an oxygen concentrator to fill up oxygen bottles. A user asks: Is any one here is using or has used an oxygen concentrator. I do know you cannot get 100% pure oxygen. Basically it is a PSA oxygen concentrator that also has a compressor mounted to it that pumps direct to scuba tanks. It will also provide continuous flow for blending, but a concentrator that small doesn't put out enough for a big compressor. Several manufacturers have boosters designed for this application though. Invacare homefill, Rix microboost *yes this was actually designed around PSA oxygen concentrators*, Philips Ultrafill *only one that will go to 3000psi*, and a few others. I use one and fill 2200 psi O2 bottles to do PP blending nitrox. It's a invocare homefill set up. Makes perhaps 200+ cuft a day of 96% O2. 2 days to fill a standard 5' tall O2 bottle used for standard acetalyne rigs. These systems can be hard to get because they need a perscription to get one. but some will sell for hobby use. (glass works etc.) I think you can still get the concentrator and compuressor for about 1000 $ and then there is an adaptor hose that is needed to connect to fill tanks that may be 100 $ unless you hae one of hte designed carry around tanks to get the part from. There are other solutions of course. Keep the unit indoors or somewhere where it is dry and low humidity and the concentrator will last a long time. I will post pics of what i have if any one want s to see them. PM me.
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Marine Lightning Protection Inc.
Saved by uncleflo on May 11th, 2021.
Given the wide range of potential issues with lightning protection of ships, it is not surprising that a common problem is that the agent does not understand how to define the most pressing concern. Ill defined Class regulations, use of ambiguous terms such as "lightning arrestor", and the widespread availability of devices with checkered histories do not help. To this end we offer a standard 20-hour consulting package that provides basic concepts, identifies prioritized issues, and develops the framework for an effective lightning protective process. Please email us with questions or details. Another fundamental problem revealed in this scientific work was that a one square foot ground plate is "hopelessly inadequate" to prevent sideflashes in fresh water.This was not addressed in these earlier standard rewrites since, at the time, there was no obvious solution. We can now solve this problem with our patented SiedarcTM electrodes that, when distributed around the hull, provide the multiple exit points needed for effective grounding.
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Why are modern 50mm lenses so damned complicated?: Digital Photography Review
Saved by uncleflo on May 11th, 2021.
Back in the days when men were iron and ships were wood, there were some things you could rely on. One of those things was your wide-aperture prime lens was a relatively simple double-guass design. Pre-1900, lens designers had already created five of the six lens types that are the basis of what we use today. (The retrofocus lens didn't come around until the 1920s, and zoom lenses, for those who are curious, are basically modified Cooke triplets.) The double gauss has been THE predominant design for wide aperture primes since the late 1800s. Over the years, designers have added additional groups to bring in more light, correct aberrations, and generally make a better lens. But the double gauss part was there in the center of the lens diagram for wide-aperture prime lenses right up until modern times. Name a famous prime lens and it was probably a double gauss: Speed Panchro, Planar, Xenon, Summicron, Takumar, Ultron, and on and on.
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Why Chocolatey is broken beyond any hope | by Keivan Beigi | Medium
Saved by uncleflo on January 20th, 2021.
I remember how excited I got when I first heard about Chocolatey. Did we finally get a package manager for Windows, one of the things I always envied about *nix and OS X(Homebrew)? I was really excited; I told my co-workers sitting around me about this amazing new tool that would finally make setting up new machines and installing applications as easy as a single command. To my surprise they didn't see how huge this was, but I didn't care. I knew how great this would be. Two years later, I have completely given up.
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Ship, Boat, and Yacht Design | Discussions | GrabCAD Groups
Saved by uncleflo on December 21st, 2019.
Aquatic engineering modeling methods, concept ideas, etc. Discussions on the latest trends and news in the boat design world. Any and all are welcome to share their models, experience, knowledge, and suggestions.
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Discuss Engineering & Design Related Topics | GrabCAD Groups
Saved by uncleflo on December 20th, 2019.
Groups provide a space to communicate about shared interests The Computer-Aided Design ("CAD") files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Each CAD and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or real-world item, product, or good it may purport to portray.
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Pros and Cons of Monocrystalline vs Polycrystalline solar panels
Saved by uncleflo on December 20th, 2019.
There are 3 types of technology utilized in the solar panels available on the market today, these are monocrystalline, polycrystalline, and thin film amorphous. As the names suggest Monocrystalline and Polycrystalline are both types of solar cells that are made from crystalline silicon. Almost all quotes you will get when considering buying solar panels for your home will use crystalline solar panels. 2-3 years ago the most common type of solar panel used in residential solar installations in America were monocrystalline solar panels but in the last three years polycrystalline solar panels have become the most commonly used solar panels in residential solar installations in America.
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Compare 5 best solar panels by reviews, efficiency, & price
Saved by uncleflo on December 20th, 2019.
At SolarReviews our mission is to arm consumers that want to buy solar panels with the best information tools possible to help them find the best solar panels for their home, the best inverter for their solar system and also the best solar prices they can get. Buying solar panels is not a simple purchasing decision because they are designed to last at least 25-30 years and so this is a long-term investment. In the first table below you will find our expert reviews of the top 5 brands of residential solar panels commonly used in the US in 2019.
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K40 C02 Laser Rail System | OpenBuilds
Saved by uncleflo on December 19th, 2019.
The goal of this build was to use as many off-the-shelf Openbuilds components as possible, leveraging bundles to simplify the build further. Still, there are a few pieces that need to be custom printed, such as the mirror and laser head mounting plates and the Mini V gantry shims. The gantry shims are essential to ensuring the height remains consistent as the beam travels from mirror to mirror. The main problem with stock "Cheap Chinese" "K40" 40W CO2 Laser cutters commonly purchased off of eBay is that they use custom, hard-to-find hardware of often questionable quality and consistency. Also, their chassis separates the tube and its fixed X Stage mirror from the moving Y Stage, thus making it nearly impossible to ensure the mirror heights stay consistent. This creates a needlessly painful alignment problem that many people constantly suffer from. Still, the core laser components provided in a stock K40 are serviceable, so the hope is that this replacement rail system will allow for a relatively affordable modification option that drastically simplifies the alignment process by improving the component quality and integrates the stages together to effectively turn a 3 dimensional alignment into a 2 dimensional one.
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Self-build home: project plan - Designing Buildings Wiki
Saved by uncleflo on December 18th, 2019.
This is a free-to-use, open-access plan for the organisation, design and construction of self-build homes. If you have ideas for things to add to the plan, you can either edit the plan and add them yourself, or submit a comment and we will add them for you. There are a number of delivery routes for self-build homes: It may not be clear which route should be followed until initial assessments have been carried out, a plot located and a brief prepared. See: Develop a delivery strategy for more information. It is also possible to work with other organisations such as social landlords, developers, or community groups to develop a self-build home, however, these projects are likely to follow a plan imposed by the lead organisation and so they are not covered here, although many of the project stages will be similar. Working with a developer is sometimes called ‘custom build’ rather than ‘self build’.
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Ground source heat pumps - Designing Buildings Wiki
Saved by uncleflo on December 18th, 2019.
Heat is stored by the thermal mass of the ground of water thermal. There are two types of heat sources: In the UK just a few metres below our feet the ground keeps a constant temperature of about 11-12°C throughout the year. The Earth’s internal heat was originally produced during accretion. Since then heat has been produced by the radioactive decay of elements such as uranium, thorium and potassium. Due to its high enthalpy, this type of heat is often harvested in volcanic areas for electricity production and large district heating. The majority of heat stored right in the Earth’s surface comes from the sun. This heat is widely available, and because of its low enthalpy, it is often harvested for local heat pump applications.
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Choosing the Right Switch: Know Your AC from Your DC
Saved by uncleflo on December 18th, 2019.
When picking a switch to use in electrical design, many people believe they can use any switch, provided its current rating is more than the maximum load in the circuit. This, of course, isn’t true. Alternating current (ac) or direct current (dc) circuits are capable of carrying very different currents, as illustrated by the ratings on the switch in Figure 1. This is why it’s so important for designers and engineers to understand how to pick the right switch for their product.
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