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juliusbeezer : technology   30

A Nation-Sized Battery | Do the Math
Putting the pieces together, our national battery occupies a volume of 4.4 billion cubic meters, equivalent to a cube 1.6 km (one mile) on a side. The size in itself is not a problem: we’d naturally break up the battery and distribute it around the country. This battery would demand 5 trillion kg (5 billion tons) of lead.
Get the Lead Out!

A USGS report from 2011 reports 80 million tons (Mt) of lead in known reserves worldwide, with 7 Mt in the U.S. A note in the report indicates that the recent demonstration of lead associated with zinc, silver, and copper deposits places the estimated (undiscovered) lead resources of the world at 1.5 billion tons. That’s still not enough to build the battery for the U.S. alone. We could chose to be optimistic and assume that more lead will be identified over time. But let’s not ignore completely the fact that at this moment in time time, no one can point to a map of the world and tell you where even 2% of the necessary lead would come from to build a lead-acid battery big enough for the U.S.
energy  storage  us  renewables  technology 
november 2018 by juliusbeezer
From hijabs to pretzels – what makes an emoji? | Technology | The Guardian
The Unicode Consortium, which oversees the introduction of new emojis, considers a number of factors for inclusion. “We look at how visually distinctive the item is, how in demand it is, and does it have longevity,” says Lee. The consortium also considers whether proposals are appropriate for a variety of cultures: in 2016, a proposal for a sauna emoji tabled by the Finnish government was approved on condition that the modesty of the naked sauna users was preserved with a towel...
Such decisions matter because Unicode only approves between 50 and 70 emojis every year. “It’s less important if you’re in the UK or the US,” says Lee, “because we’ve got fancy, high-end phones – but if you have a $15 Android phone in Uganda, the drain on resources is a much bigger deal.” Rendering and storing a large amount of emojis can sap the memory of weaker-powered phones.
language  technology  telephony  code 
september 2018 by juliusbeezer
Electric Vehicles, Batteries, Cobalt, and Rare Earth Metals  - Union of Concerned Scientists
A lot of these warnings have been incorrectly categorized under “EVs and rare earth metals.” Though neither lithium nor cobalt are rare earth metals, and rare earth metals aren’t nearly as rare as precious metals like gold, platinum, and palladium, there are important issues surrounding the production of lithium-ion batteries that must be acknowledged and addressed.
Cobalt, a bluish-gray metal found in the Earth’s crust, is one of today’s preferred components used to make the lithium-ion batteries that power laptops, cell phones, and EVs. Cobalt is mined all over the world, but 50 to 60 percent of the global supply comes from the Democratic Republic of Congo (DRC), which has a poor human rights track record. According to UNICEF and Amnesty International, around 40,000 children are involved in cobalt mining in DRC where they make only $1 – $2 USD per day. DRC’s cobalt trade has been the target of criticism for nearly a decade, and the U.S. Labor Department lists Congolese cobalt as a product it has reason to think is produced by child labor. More troubling, cobalt demand has tripled in the past five years and is projected to at least double again by 2020.
energy  driving  technology 
october 2017 by juliusbeezer
After 12 Rejections, Apple Accepts App That Tracks U.S. Drone Strikes
Five years ago, I made a simple iPhone app. It would send you a push notification every time a U.S. drone strike was reported in the news.

Apple rejected the app three times, calling it “excessively objectionable or crude content.”

Over the years, I would occasionally resubmit the app, changing its name from Drones+ to Metadata+. I was curious to see if Apple might change its mind. The app didn’t include graphic images or video of any kind — it simply aggregated news about covert war.
apple  politics  technology  agnotology  war 
march 2017 by juliusbeezer
Tires with Smooth Tread by Jobst Brandt
Commercial aircraft, and especially motorcycles, demonstrate that a round cross-section tire, like the bicycle tire, has an ideal shape to prevent hydroplaning. The contact patch, a pointed canoe shape, displaces water exceptionally well. In spite of this, hydroplaning seems to be a primary concern for riders who are afraid to use smooth tires. After assurances from motorcycle and aircraft examples, slipperiness on wet pavement appears as the next hurdle.

Benefits of smooth tread are not easily demonstrated because most bicycle riders seldom ride near the limit of traction in either curves or braking. There is no simple measure of elapsed time or lean angle that clearly demonstrates any advantage, partly because skill among riders varies greatly. However, machines that measure traction show that smooth tires corner better on both wet and dry pavement. In such tests, other things being equal, smooth tires achieve greater lean angles while having lower rolling resistance.

Tread patterns have no effect on surfaces in which they leave no impression. That is to say, if the road is harder than the tire, a tread pattern does not improve traction. That smooth tires have better dry traction is probably accepted by most bicyclists, but wet pavement still appears to raise doubts even though motorcycles have shown that tread patterns do not improve wet traction.
cycling  technology 
march 2017 by juliusbeezer
CLASSIC TRACKS: The Bee Gees 'Stayin' Alive' |
"Then Albhy and I came up with the idea of finding two bars [of real drums] that really felt good and making an eternal tape loop." In fact, the engineer's initial intention had been to take two bars of the four-track drums from 'Night Fever', re-record these about 100 times and then splice them together in order to create a new track. It was only while he, Galuten and the band listened and listened and listened to the song over the Auratones in order to find the best couple of bars that Richardson then decided to copy these onto the half-inch tape of an MCI four-track machine and create the aforementioned loop.

"The drums from 'Night Fever' basically consisted of two bars at 30ips," he says. "The tape was over 20 feet long and it was running all around the control room — I gaffered some empty tape-box hubs to the tops of mic stands and ran the tape between the four-track machine and an MCI 24-track deck, using the tape guides from a two-track deck for the tension. Because it was 4/4 time — just hi-hats and straight snare — it sounded steady as a rock, and this was pre-drum machine. For the tempo I used the varispeed on the MCI four-track, so the drums that ended up on the 24-track were at least third-generation, and because the tape heads were so badly worn I brightened the tracks that were already Dolby A-encoded with high-end EQ from the API console."
music  technology  sound  sounddesign 
february 2017 by juliusbeezer
Should Airplanes Be Flying Themselves? | Vanity Fair
In other words, in a crisis, don’t just start reading the automated alerts. The best pilots discard the automation naturally when it becomes unhelpful, and again there appear to be some cultural traits involved. Simulator studies have shown that Irish pilots, for instance, will gleefully throw away their crutches, while Asian pilots will hang on tightly. It’s obvious that the Irish are right, but in the real world Sarter’s advice is hard to sell.
safety  aviation  technology  psychology 
october 2016 by juliusbeezer
Unofficial TCR Advice, Gearing
Despite the top end of most road gearing setups not being needed in the TCR, the lower end of the range will certainly be needed. How small the easiest gear should be depends on the average gradient of the steeper climbs, the cyclist's predicted climbing speed (which depends on the cyclist's available power and the current elevation), and the cyclist's preferred cadence.

Some climbs on the TCR 2016 route have sustained sections of 8-10% gradient at elevations above 1500 metres (e.g., Grosse Scheidegg and Passo Giau). To sustain 8 kph on a 10% gradient (a VAM of 800 metres per hour) requires about 200 watts for a rider with a system weight of 85 kg (rider + bike + gear), see this calculator. The effect of elevation is covered in the Determinants of Speed section (see the Environmental Factors page), which shows that available power is reduced by about 10% at 1500 metres altitude due to the reduced oxygen density, so producing 200 watts at that altitude feels similar to producing about 220 watts at sea level. This is likely to be around the limit that a typical TCR rider can sustain for an extended period during the event without causing excessive fatigue or when already fatigued. Having a gear that can be ridden at 8 kph is therefore advisable
cycling  technology  physiology  geekout 
september 2016 by juliusbeezer
Stabilizing the Gamin 1000 Dynamo Power Cable | Chris Bennett's Triathlon and Cycling Blog
A short post on powering your Garmin 1000 from the dynamo while riding. Often, the micro-USB power cable works loose losing power. Here’s my solution.

The first step is to get a right angle micro USB cable
maps  cycling  technology 
september 2016 by juliusbeezer
InkCase : Smart Case Second Screen for iPhone 6 / 6s. Official website
A unique and original Screen Case
InkCase Screen Case with a screen using E Ink technology, customize your case as you wish with the InkCase screen. Change photos anytime. InkCase adds a 4.3 inch E Ink screen display to your iPhone 6, adding conveniences and better readability. InkCase phone case connects wirelessly to your iPhone 6 through Bluetooth, allowing you to access contents without switch on the iPhone’s display. Reading on inkCase makes your reading more enjoyable with the paper like display quality and helps you conserve your iPhone’s battery while displaying a beautiful case. Screen Case,
technology  telephony 
september 2016 by juliusbeezer
Using Your Smartphone as a GPS -
There are various ways to carry your phone. We tend to keep ours in shorts pockets – which is a reason why the smaller phones can be more travel-friendly than the ‘phablets’, even if the latter have enticingly large screens. Gossamer Gear does a nice shoulder strap pocket, or there are mounts that attach to the handlebars. Watch out for dust and rain though, unless you use a Lifeproof case with their Life Active Bike Mount. Loksaks are cheap and work very well too, if you’re on a budget. And always apply a protective glass screen, like those from Zagg...
After considerable investigation, our favourite app for backcountry bikepacking is Gaia GPS, which works on both iOS and Android devices. It costs $20, which is more than most.
maps  cycling  technology  bags 
september 2016 by juliusbeezer
Anker Steckdosen Ladegerät mit PowerIQ: Elektronik
Anker Steckdosen Ladegerät mit PowerIQ Technologie, 36W 5V / 7.2A, 4x USB Die PowerIQ Technologie maximiert Kompatibilität mit Android, Apple und anderen Geräten, indem sie Ladegeschwindigkeiten von bis zu 7.2A an 4 Ports oder 2.4A pro Port liefern kann.
36W bieten genügend Energie um bis zu 4 Geräte gleichzeitig aufzuladen.
Kompakt (9.1 × 6.4 × 2.5cm), einheitliches Design, 100-240V Input ideal für internationale Reisen.
Robuste Materialien, Premium Schaltkreise und UL Zertifizierung bieten Sicherheit und Verlässlichkeit.
Packungsinhalt: Anker 36W Quad-Port Ladegerät, Bedienungsanleitung, 18 Monate Herstellergarantie.
cycling  technology 
september 2016 by juliusbeezer
Unofficial TCR Advice, USB Charging
Having a dynamo-powered USB charger is not essential because there are some good, high-capacity reserve battery packs now available. These are useful even for people who do have a dynamo-powered USB charger so that they have a backup option in case of failure and can also be used instead of the dynamo power to avoid having extra drag on the front hub, which decreases average speeds by about 0.3 kph when in use (see the page on Hub Resistance). In addition, dynamo-powered USB outputs don’t work well at night when powering the lights at the same time, making recharging a Garmin while riding at night difficult without a reserve battery.

There is a large range of small, compact reserve USB batteries available that have a small capacity that give enough power for recharging one device. Higher-capacity versions are understandably larger and heavier, but I chose one that has a fair amount of capacity but is not too big (95 x 45 x 25 mm, 135 grams) the Anker Astro v2 6400 mAh (Amazon), which has a display showing the remaining charge in 10% increments.

Compared to the stated capacity of 6400 mAh for the Anker battery, the battery in a Garmin Edge 800 or 1000 is about 1000-1200 mAh, and in my iPhone 5S it's about 1500 mAh (in the largest iPhone, the 6S Plus, it's about 2700 mAh). The stated values don't always add up, but I can certainly charge my Garmin four full times with the Anker or my iPhone three full times.

As menitoned on the Lights page, my reserve front light is an Exposure Sirius, which has a capacity of 2600 mAh. I actually have a cable that can be plugged into this so that it can become a reserve battery to recharge other devices (see here), but I normally prefer to save the charge in that for lighting.
cycling  technology 
september 2016 by juliusbeezer
GPS cycle route planning made easy - how to plan and follow a bike route |
While plotting a route on a smartphone is probably the quickest way to get a route ready, for more detailed route planning there’s no beating the advantage of using a bigger computer screen. I can spend ages looking at online maps and researching new roads and putting together different routes.

Many of the more popular mapping services offer both an app and website, and you can often save and store a route, making it easy to get onto your phone.

Here are just a few of the popular mapping services:
cycling  maps  technology 
august 2016 by juliusbeezer
ASME DC | Proceedings | IMECE2013 | Volume 13: Transportation Systems | A Study on the Efficiency of Bicycle Hub Gears
This study experimentally measured the efficiency of new generation bicycle hub gears. Since efficiency of bicycle drivetrains can be very close to 100% and vary by small amounts between gears bias errors and measurement accuracy must be identified and controlled. For this study an ergometer frame was altered to support research test equipment. A 1 HP motor and gearbox were used to drive the crankshaft. The hubs were attached directly to the steel flywheel using shortened bicycle spokes, eliminating extra chains or drive components. This setup minimizes measurement uncertainty in the drivetrain. Force-transducers were used to measure the motor and flywheel torque, and two magnetic reed switches were used to measure the speed of the motor and flywheel. Efficiency for each individual gear in each hub was calculated for 14 different power speed combinations. The efficiency of each gear was plotted against flywheel Torque, and an exponential model was fit to the data. This model accounts for known variations in efficiency with power and speed, and provides insight into the torque-speed-efficiency relationship. Four internally-geared hubs were measured and compared with a single speed direct drive train and a belt drive. The internal planetary gear hubs measured were the Shimano Alfine 11, Rohloff 500/14 Speedhub, SRAM Dual-Drive, and the Sturmey Archer X-RK8(W). In addition a single-speed direct chain drive, a single-speed belt drive, and a 7-speed derailleur system were measured. The efficiency of the Shimano Alfine ranged from 90.4% to 96.6%. The efficiency of the Rohloff speed hub ranged from 95.8% to 99.5%. The efficiency of the Sturmey Archer hub ranged from 84.6% to 99.8%. The efficiency of the single speed chain drive was found to be 99.71% and the belt drive 98.0%. The efficiency of the 7-speed derailleur ranged from 97.7% to 99.4%. These values found for efficiency are comparable to other studies.
cycling  technology  geekout  rohloff 
june 2016 by juliusbeezer
Ford Is Finally Thinking Beyond Cars
Ford is working with design firm Ideo to envision the post-car generation of mobility. You know Ideo—the company that designed Apple’s first mouse and laptop, and even Ford’s interactive dashboards, through a proprietary process that the company calls “design thinking.” Right now, Ideo is hard at work for Ford in London, Shanghai, and Chicago, prototyping new products and services that might be as world-changing as personal motorized vehicles were in 1896.

In a narrative that sometimes reads like an Onion article, the NYT peeks into Ideo’s Chicago-based lab where designers assign themselves various tasks in order to test the city’s transportation options. One example: Get to a restaurant four miles away within 45 minutes while carrying heavy shopping bags, spending only $10 for three people.
transport  driving  driverless  technology 
february 2016 by juliusbeezer
The Pope and the Planet by Bill McKibben | The New York Review of Books
The pope’s contribution to the climate debate builds on the words of his predecessors—in the first few pages he quotes from John XXIII, Paul VI, John Paul II, and Benedict XVI—but clearly for those prelates ecological questions were secondary...

It is, therefore, remarkable to actually read the whole document and realize that it is far more important even than that. In fact, it is entirely different from what the media reports might lead one to believe. Instead of a narrow and focused contribution to the climate debate, it turns out to be nothing less than a sweeping, radical, and highly persuasive critique of how we inhabit this planet—an ecological critique, yes, but also a moral, social, economic, and spiritual commentary. In scope and tone it reminded me instantly of E.F. Schumacher’s Small Is Beautiful (1973), and of the essays of the great American writer Wendell Berry. As with those writers, it’s no use trying to categorize the text as liberal or conservative; there’s some of each, but it goes far deeper than our political labels allow. It’s both caustic and tender, and it should unsettle every nonpoor reader who opens its pages.

The ecological problems we face are not, in their origin, technological, says Francis. Instead, “a certain way of understanding human life and activity has gone awry, to the serious detriment of the world around us.” He is no Luddite (“who can deny the beauty of an aircraft or a skyscraper?”) but he insists that we have succumbed to a “technocratic paradigm,” which leads us to believe that “every increase in power means ‘an increase of “progress” itself’…as if reality, goodness and truth automatically flow from technological and economic power as such.”
environment  religion  climatechange  technology  science  literature 
february 2016 by juliusbeezer
Technologically challenged – moi?! | ClaireCoxTranslations
My default troubleshooting solution is always to switch the computer off and on again – it’s amazing how often that clears whatever logic loop has become stuck in the bowels of your PC! I’ve had a few cases of printer problems in recent weeks too, and the first was resolved (after I called the manufacturer for help), not just by switching the printer and the PC off, but by switching off my wireless router too and rebooting them all in order – who would have thought such a simple solution would work? Physically unplugging things often helps too – don’t ask me why, but it’s certainly worth a go!
tools  technology  software  translation 
november 2015 by juliusbeezer
Creative electronic tools - Bare ConductiveBare Conductive
Make interactive projects using Electric Paint, the Touch Board and the Starter Kit
art  technology  printing 
october 2015 by juliusbeezer
Introduction to Sensing Surfaces | East London Printmakers
This workshop is aimed at people who already have a theoretical as well as practical understanding of water based screenprint on paper and want to learn how to expand their practice by transforming the paper medium into a reactive, sensing surface.

In order to explore the implications of combining screenprint with interactive technology, the course will provide an introduction to building simple and effective sensors based on capacitive sensing.
art  technology  printing 
october 2015 by juliusbeezer
JAMA Network | JAMA | Ethical Implications of Patients and Families Secretly Recording Conversations With Physicians
With recent advances in technology, smartphones can become recording devices with the touch of a button. This technological capability gives patients and their families the ability to easily and surreptitiously record conversations with physicians. The frequency of such recordings or whether they even occur is unknown. The ubiquity of smartphones, however, suggests the potential for secret recordings to occur. As of January 2014, 58% of Americans owned a smartphone, including 83% of young adults.1 Although recording conversations with physicians may provide some benefit for patients and their families, secret recordings can undermine patient-physician relationships and ultimately affect the provision of health care.
medicine  ethics  privacy  confidentiality  gronkulation  technology  internet 
march 2015 by juliusbeezer
Maya Pedal - Pedal Powered Machines in Guatemala
Bicimaquinas are easy and enjoyable to use. They can be built using locally available materials and can be easily adapted to suit the needs of local people. They free the user from rising energy costs, can be used anywhere, are easy to maintain, produce no pollution and provide healthy exercise.

We make water pumps, grinders, threshers, tile makers, nut shellers, blenders (for making soaps and shampoos as well as food products), trikes, trailers and more.
cycling  technology  agriculture  transport 
june 2014 by juliusbeezer
Peter Thiel’s Rise to Wealth and Libertarian Futurism : The New Yorker
Thiel became the largest contributor to the Singularity Institute, a think tank, co-founded, in 2000, by his friend Eliezer Yudkowsky. The institute is preparing for the moment when a machine can make a smarter version of itself, and aims to insure that this “intelligence explosion” remains “human-friendly.”
geek  future  business  technology 
may 2014 by juliusbeezer
Edge; DIGITAL MAOISM: The Hazards of the New Online Collectivism By Jaron Lanier
Nasty hive mind outbursts have been flavored Maoist, Fascist, and religious, and these are only a small sampling. I don't see why there couldn't be future social disasters that appear suddenly under the cover of technological utopianism. If wikis are to gain any more influence they ought to be improved by mechanisms like the ones that have worked tolerably well in the pre-Internet world.
culture  social  technology  wikipedia 
december 2012 by juliusbeezer
Main Page - Open Source Ecology
Open Source Ecology is a movement dedicated to the collaborative development of tools for replicable, open source, modern off-grid "resilient communities." By using permaculture and digital fabrication together to provide for basic needs and open source methodology to allow low cost replication of the entire operation, we hope to empower anyone who desires to move beyond the struggle for survival and "evolve to freedom."
opensource  technology  cool  agriculture 
january 2011 by juliusbeezer
Tor: Download
How to use Tor: for the eighth day of the week?
technology  internet  security  privacy  tor 
june 2010 by juliusbeezer The Glass Box And The Commonplace Book
iPad (but not Kindle) locks you out of copying and pasting the text you are reading
internet  copyright  history  technology  text  journalism 
may 2010 by juliusbeezer
Worldchanging: Bright Green: Envisioning a Leapfrogged World
if it can ship on a truck it's leapfroggable: e.g. solar-UV water purification vs. Victorian plumbing
development  technology  leapfrogging 
july 2009 by juliusbeezer

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