Teenagers like to take long showers. They can easily spend 20 minutes in there, idling away their time as well as the family’s hot water. I’d done a few rounds of knocking on the bathroom door. I’d even taped photos of baby Arctic seals on the door to remind the kids of the consequences. Didn’t seem to get the point across.
When one night came where one of the kids drained the hot water from our tank I knew desperate measures were needed. I threatened to switch out the nice Delta showerhead with a miserly spray one, guaranteed to save water at the price of a miserable shower experience. Certainly that would get the point across but I knew I’d soon have to swap it out. You know, the Geneva Convention and all.
I began to ponder how a proper geek might solve the problem. I am a Site Reliability Engineer in my day job and I love gathering metrics on the computers I wrangle. What if there were a way to track my kids’ use of water? Wouldn’t it be great to show them how much water their showers actually use? I began to dream up a product I could create that would do just that but then some clever Googling showed me one was already out there: the Water Hawk. Continue reading →
I joined up with a Facebook group called Rivendell Open Source Radio Automation Users as a place to trade tips on using Rivendell. A question that comes up frequently is how Rivendell can be run in the cloud. Since I’ve been doing this for eight years or so I have a pretty good understanding of the challenges. I’ve mentioned some of it before but thought I’d go into more detail of my current setup.
I’m running Rivendell 2.19.2, the current version, and presently I’m not actually running it in the cloud though I could easily change this in a few moments. The magic that makes this happen is containerization. I have created my own Docker instance which installs everything I need. This container can be fired up virtually anywhere and it will just work.
Here’s a summery of my setup. In my container, I install CentOS 7. Then I pull in Rivendell from Paravel’s repos with a “yum install rivendell” command. Rivendell needs the JACK audio subsystem to run so I install Jack2 from the CentOS repos, too. To this I add darkice as an encoder, JackEQ for some graphical faders/mixers, a LADSPA-based amplifier module to boost gain, and of course Icecast2 to send the stream to the world.
Now, one of the problems with a CentOS-based setup is that CentOS tends to have fewer of the cool audio tools than distributions like Debian and Ubuntu have. These Debian-based distros are not officially supported with Paravel packages so you either have to hunt for your own Rivendell dpkgs or you build your own. I’ve found a few of these dpkgs mentioned on the Rivendell Developer’s mailing list but I’ve not had the time to make sure they’re up to date and meet my personal needs. Thus, for my personal setup you’ll find a few parts which I have compiled myself, rather than install from a package. A project for me to take on in my Copious Free Time is to create an entirely repo-based Docker container but I’m not there yet.
Rivendell needs a MySQL/MariaDB database to store its data. I rely on a non-containerized instance of MariaDB in my setup because I already use the database for other projects and didn’t want to create an instance solely for Rivendell.
Interesting analysis of Russian reaction to SpaceX’s successful docking and return of it’s CrewDragon spacecraft.
One of the big questions surrounding the first launch of SpaceX’s Crew Dragon spacecraft was how the Russians would react. They have held considerable sway in the International Space Station partnership by controlling access to the orbiting laboratory since the 2011 retirement of NASA’s Space Shuttle. So far, the Russian response has been one of throwing small bits of shade here and there but trying not to be too obvious about it.
On Sunday, when SpaceX’s Dragon spacecraft docked with the International Space Station, the Russian space corporation sequestered cosmonaut Oleg Kononenko in the Russian segment of the station. This was, Roscosmos said, so that Kononenko could take emergency action in case the Dragon became uncontrollable and crashed into the space station.
After the successful docking, Roscosmos tweeted a Russian language congratulation to NASA, but underscored the fact “that flight safety must be above reproach.” An hour later it published a rare tweet in English, sending “its sincere compliments to the colleagues from NASA,” but without the emphasis on vehicle safety. Neither tweet mentioned SpaceX. (Later, Roscosmos said NASA ordered the ship and, therefore, deserved the congratulations.)
I went down the rabbit hole this morning, finding all about the origins of last year’s Camp Fire, the most destructive fire in California’s history. The cause has been traced to faulty equipment on a high-voltage transmission tower. Being a geek, I wanted to learn more about the technical aspects of this part, so I dug up some informative articles.
First, here’s the start of an informative story on the disaster itself:
PG&E has released new details of damage to its electrical equipment in the area where Butte County’s catastrophic Camp Fire began last month — including a broken power pole “with bullets and bullet holes at the break point.”
The new information is included in a letter updating the California Public Utilities Commission on a pair of electrical incidents that occurred Nov. 8 about the same time the fire started and began to race toward the town of Paradise.
One of the incidents occurred at 6:15 a.m. on a major electrical transmission line suspended on a series of high steel towers on a steep slope above the North Fork of the Feather River. PG&E’s new letter suggests that a large steel hook connecting high-voltage equipment to a tower near the utility’s Poe Dam failed, causing the equipment to arc.
The United States has over 90,000 metric tons of nuclear waste that requires disposal. The U.S. commercial power industry alone has generated more waste (nuclear fuel that is “spent” and is no longer efficient at generating power) than any other country—nearly 80,000 metric tons. This spent nuclear fuel, which can pose serious risks to humans and the environment, is enough to fill a football field about 20 meters deep. The U.S. government’s nuclear weapons program has generated spent nuclear fuel as well as high-level radioactive waste and accounts for most of the rest of the total at about 14,000 metric tons, according to the Department of Energy (DOE). For the most part, this waste is stored where it was generated—at 80 sites in 35 states. The amount of waste is expected to increase to about 140,000 metric tons over the next several decades. However, there is still no disposal site in the United States. After spending decades and billions of dollars to research potential sites for a permanent disposal site, including at the Yucca Mountain site in Nevada that has a license application pending to authorize construction of a nuclear waste repository, the future prospects for permanent disposal remain unclear.
On its 60th anniversary, the civilian age of nuclear power in America appears to be almost over. But with the country awash in radioactive waste and plutonium stockpiled for warheads, the task of managing this atomic legacy grows ever more urgent. Opening a long-delayed waste repository at Yucca Mountain in Nevada is imperative.
President Dwight Eisenhower formally opened America’s first commercial nuclear power station at Shippingport, Pa., near Pittsburgh, on May 26, 1958. He declared it would “put the atom to work for the good of mankind, not his destruction.” His nuclear cheerleader, Lewis Strauss, chairman of the Atomic Energy Commission, had promised power “too cheap to meter.”
Today, with cheap gas and falling prices for wind and solar energy, nuclear power is often now too expensive to sell. Six plants closed from 2013 to 2017. At least seven more — from the Oyster Creek plant in New Jersey to the Diablo Canyon plant in California — have been earmarked for final shutdown, often years before their operating licenses expire. About a quarter of the nation’s nuclear power plants don’t cover their operating costs, according to a recent analysis by Bloomberg New Energy Finance.
America’s cellular network is as vital to society as the highway system and power grids. Vulnerabilities in the mobile phone infrastructure threaten not only personal privacy and security, but also the country’s. According to intelligence reports, spies are eavesdropping on President Trump’s cellphone conversations and using fake cellular towers in Washington to intercept phone calls. Cellular communication infrastructure, the system at the heart of modern communication, commerce and governance, is woefully insecure. And we are doing nothing to fix it.
We were at a “repair cafe” inside the Elkridge Library in Howard County, Maryland. Instead of silence, we were surrounded by the buzzing of power drills and the whirring of sewing machines. Goedeke was one of the “master fixers” there. He doesn’t like the term, though; he says it should be reserved for the professionals. “We’re all just amateurs at this, and we’re just having fun, mostly,” the 67-year-old retired engineer said.
Around the room, 10 others were helping residents repair everything from tables and lamps to jewelry and clothing. In one corner, a handful of vacuums had begun to accumulate. These were things people normally threw away when they malfunction. “[Our society] has been inculcated in the last 50 years with this disposable concept and to buy the best and the latest,” Goedeke said. “We just don’t expect to keeps things around.”
Hey there, I’m back. This time with sort of sad but, “welp, obviously because it’s still 2018” news. Like most pure things, the fun, satisfying, viral video of a former NASA engineer pranking package thieves, which made the entire internet feel vindicated, is not what it seems.
Earlier this week, Mark Rober, an inventor-turned-YouTuber who worked on NASA’s Curiosity rover, among other impressive things, published an 11-minute video detailing how he spent six months creating the ultimate revenge contraption after someone stole an Amazon package off his porch. He called it his “Magnum Opus,” and it went mega, mega-viral, garnering more than 38 million views in three days, and elicited a collective “HELL YES” of joy and satisfaction from everyone who has ever had their stuff taken.
But shortly after the ode to all the packages we’ve lost before swept across the media landscape, viewers on the internet did what they do best: pick it apart.