Category Archives: Science/Environment

Digital Movies: Full Stream Ahead

Netflix

Price: $7.99 per month

Six words or less: Netflix is awesome

I actually had a Netflix account once, but found the selection lacking and eventually cancelled the subscription. The task of writing this review made a good excuse to try the service again.

Set up is quick and you start with a free one-month trial, a great way to get people hooked.

You’re given the option to create a taste profile and start ranking films right away. I’d recommend doing this, not only because it’s fun — for people with my level of OCD anyway, I spent an hour giving star ratings to 450 films — but because it gives Netflix the ability to suggest titles you might like. And it does a great job, rightly guessing I love Alfred Hitchcock, Fawlty Towers and comedian Louis C.K., and recommending several westerns, screwball comedies and blacksploitation flicks I’ve been meaning to watch for years.

Netflix isn’t meant for catching the latest DVD release. I found myself almost overwhelmed by the number of classics I wanted to watch immediately, from Inherit the Wind to Coffy to the original Psycho, and was impressed by Netflix’s lineup of modern films and TV shows.

You can watch on a computer, smartphone and any modern gaming console or Internet-enabled TV or Blu-ray device. The quality is near-HD and streams almost flawlessly, even on a phone’s data connection.

Netflix is easy, intuitive, and the recommendations system ensures there will always be something worth watching right on your home page. For $8 a month, it’s a bargain.

iTunes Store

Price: Varies by title

Six words or less: Massive selection, kind of pricey

Around since 2008, the iTunes Store’s video section got the jump on Internet rentals, and has a robust library as a result.

The HD comedy section alone has 738 titles. There’s also an enormous selection of classics, including a huge library of brilliantly restored Criterion collection films and a full list of new releases. Downloads are available in standard and high-definition (including full Dolby 5.1 sound) and the HD is Blu-ray quality.

The videos are playable on iPhones, iPads, Macs, PCs and Apple TVs, and available to watch for 30 days from the time of purchase (although this drops to 24 or 48 hours once you press play for the first time). Rentals start as low as $3, with new releases and HD copies costing a couple dollars more. There are also videos available for full purchase as a digital copy, but these cost up to $24.99, which is outrageous; some new Blu-rays cost less.

There are a few other disadvantages. Videos can’t be streamed, only downloaded, which means you need the digital file on a device to watch it. If you download on a computer and move it to an iPhone, the file ceases to exist on the original hard drive, and users can’t transfer the file at all if it’s downloaded on a mobile device.

And movies take hours to download.

Although it doesn’t offer anything like Netflix’s recommendation system, the iTunes Store does have a handy power-search option.

Android Market

Price: Varies by title

Six words or less: Not much on offer

Launched last summer, Google’s service is still experiencing growing pains. The selection isn’t great, in numbers or quality.

There wasn’t a single feature on its homepage I was interested in watching, and, after a cursory look through the genre categories, I found myself scrolling through pages of documentaries before finding something worth renting.

Clicking on The Corporation, I agreed to pay $3.99 — a quick process since I was already signed into my Google account — hit play and a Youtube video launched. The quality was poor, with bad colours and too much pixelation, and constant buffering made watching in full screen impossible.

A higher-quality download option would have been nice, but users can stream rentals instantly on Android phones without having to transfer files — a great feature.

Pricing mirrors the iTunes Store, and you get the same 30-day/24-hour window for viewing.

Rogers on Demand

Price: Varies by title with some free content (and premium content available to Rogers customers)

Six words or less: Mediocre

Rogers on Demand (ROD) is a strange service. It currently only has 46 videos available to stream for free, 24 for Rogers customers — ranging from Hoosiers to Foxy Brown and all three Robocops — and 22 accessible by anyone, but these were almost all trailers for years-old movies like Batman Begins and Twilight. In other words, the already mediocre offerings were obviously heavily padded.

Video quality was okay, about on par with a standard Youtube video — although some of the widescreen movies I watched were squished sideways into a 4:3 format.

The rental selection was much more diverse, but still underwhelming — I counted just over 1,500 titles going by the numbers listed in genre categories, but that’s also heavily padded because many films pop up in multiple sections.

Pricing is similar to the Apple and Google services and comes with the same window for watching. However, ROD is only accessible from a computer or cable box — the website doesn’t work on smartphones and the Rogers Live application doesn’t include movie rentals.

The service is kind of like the Google Market, nothing special, but worth looking through if you can’t find entertainment anywhere else.

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The $150 robot revolution

How Microsoft’s affordable Kinect video game system is changing the world of advanced robotics

The $150 robot revolution

A sudden gust of wind blew a six-bladed, remote-controlled helicopter over a white bus half buried in bricks and busted slabs of concrete. Jimmy Tran, a Ryerson University doctoral candidate, scrambled at the multi-levered controls as the device shot toward the horizon. “I had to land it as fast as possible,” he says. “ I didn’t want to hit power lines or cars.”

Despite his efforts, the hexarotor, now a mess of shattered blades and smashed chip boards, sits among the piles of electronics at Ryerson’s Network-Centric Applied Research Team’s (N-CART) lab. “That’s 5,000 bucks, another 1,000 for the parts to repair, plus man hours,” says Alex Ferworn, who oversees N-CART. But it could have been much worse—if not for one piece of hardware cradled under the helicopter. Ferworn’s group uses robots and computers to help search and rescue, bomb disposal and crime scene investigation teams. The day the chopper crashed they were testing a new technique to map rubble using a 3-D scanner that generates images to help rescuers.

And that scanner did not cost tens of thousand of dollars, like the scanners on most unmanned aerial vehicles (UAVs). It cost $150, and it came from a Microsoft Kinect video game.

It’s the crumpled piece of hardware that was left hanging under the chopper at the crash site, and it saved the project simply because it is so cheap to replace. “Something that costs 150 bucks, we’ll laugh about it. It’s change,” says Ferworn. Now, he says, the only lasting result of the gust of wind, aside from a few costly repairs, is that everyone is calling Jimmy, the pilot, “Crash.”

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Weighing a new option

 

Weighing a new optionAs with so many yo-yo dieters, the weight of a kilogram is constantly in flux—at least at an atomic level. But Ottawa researchers are hoping to get the kilo’s waistline permanently in check by changing how it’s measured.

The kilogram is currently defined by the International Prototype Kilogram, a golf-ball-sized cylindrical weight made out of platinum alloy. Because a kilogram is a physical object, it constantly releases and collects atomic particles, meaning its mass—and the mass of all kilograms—is always changing. ““If [the IPK] moves up or down the others have to follow,” says Barry Wood of the National Research Council in Ottawa. “It’s totally artificial.”

Wood and his team are heading up a movement to measure kilograms against the charge of an electron, a natural constant, using a type of specialized motor called the watt balance. “You can lift mass with a motor,” he says. “If I know how much current I’m putting into the motor, that tells me details about how much I’ve lifted.” Since the NRC purchased the watt balance (pictured below) from the British government two years ago, Wood has been using the room-sized metal machine to determine exactly how much current is needed to lift a kilogram. The data, which has so far cost $2.5 million to collect, is compared to two other watt balances in the U.S. and Switzerland, and used to calibrate the devices to make their results consistent.

 

Wood estimates this will take about four years, and then the International Bureau of Weights and Measures will redefine the kilogram using the electric standard. It won’t mean much for dieters, but will have a big impact on the scientific community. “This new process will stay the same for the next thousand, million years,” says Wood. “That’s a characteristic we value.”

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Space police

A group of skywatchers set their sights on secret space missions—including a U.S. Air Force project

U.S. Air Force/Reuters

An orbiting weapons platform, a spy plane, or a decade-old, billion-dollar money pit. The U.S. Air Force’s X-37B space planes are a cloak-and-dagger project, but their secret orbits are known, and that discovery was made, in part, by Canadians. They’re part of an international organization of volunteer skywatchers who’ve been tracking secret government satellites for over 30 years.

The purpose of the planes is now a closely guarded secret, but they started as an open NASA project before being moved to the air force, so some information about them is known. The first X-37B is on the ground following its initial mission, which lasted from April to December 2010, and its sister is currently in orbit. They look like miniature versions of the space shuttle, with stubby wings for gliding at high altitudes, a solar panel array that keeps them powered in space, and a cargo bay about the size of a standard pickup truck’s bed. They’re also fully robotic, and their launches led to speculation, especially from the Chinese and Russian governments, that the U.S. was attempting to weaponize space.

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Never say die

Nearly immortal jellyfish could help unlock health secrets. PHOTO BY: Barcroft Media

The world’s oceans are being infested with a specific species of jellyfish—one that can potentially live forever. “We’re facing a worldwide silent invasion,” says Maria Pia Miglietta, a biology researcher at Pennsylvania State University. What makes this particular creature—the Turritopsis dohrnii—so special is its ability to change from its adult state (the tentacle-trailing dome we all know and avoid) back into tiny polyps, restarting what would normally only be a life cycle of a few months and allowing it to create more colonies, and thousands more jellyfish. “It’s like a butterfly,” says Miglietta, “but instead of dying it turns back into a caterpillar.”

The process is called transdifferentiation—that’s when specialized cells change from one type into another. It occurs elsewhere in nature, mostly in partial organ regeneration, but scientists don’t know of any other animals that use it the same way as this particular jellyfish. And learning how the Turritopsis “switches on genes that rejuvenate their cells” may result in major breakthroughs in reversing the cellular degeneration that causes diseases like Alzheimer’s and Parkinson’s, says Stefano Piraino, a professor of biology and environmental science at Italy’s University of Salento. It could also lead to greater insight into the world’s most deadly illness: “I don’t want to say that we will find a solution for cancer,” says Piraino. “But it could contribute to the understanding of how cancer occurs.”

The Turritopsis, which National Geographic has dubbed the “Benjamin Button of the deep,” was first discovered about 130 years ago. It’s only a few millimetres in size, uses tiny stingers to capture, kill and feed on crustacean larvae, and is a favourite meal of sea spiders. The Turritopsis is also quite susceptible to viruses, fungi and bacteria, especially in its polyp stage. Those facts have been known for decades. But the regenerative abilities that set it apart weren’t discovered until 1992. That’s when an Italian student accidentally left an adult specimen in an uncovered bowl of water. He returned to the lab a few days later to find the jellyfish gone and a group of cells in its place. The animal had reverted to an earlier state to survive the stressful conditions in the bowl, something the researchers had never seen before and have so far been unable to study in nature. This finding went relatively unreported until Miglietta published a paper last year, which identified the species’ invasive spread.

Turritopsis has been found all over the world, from Japan to Italy to the United States, and it continues to proliferate. Miglietta believes that cargo ships are carrying the species, causing colonies to pop up whenever ballast water—which ships pump in and out for stability—is dumped in foreign ports. The fact that the jellyfish have also been found nearly 500 km from the entrance of the Panama Canal, far from major shipping routes, is proof that Turritopsis is fully capable of covering large distances on its own. And the jellyfish are adapting to their new environments. In tropical areas, for instance, the species is beginning to shed a few of the tentacles present in its genetically identical relatives living in more temperate places.

But is the jellyfish’s spread an environmental problem? After all, foreign species stowed away in ships have resulted in disastrous consequences in the past. “Some invasions have really nasty, dramatic economic and ecological effects,” says Miglietta. In the 1980s, for instance, a ship dumped ballast water containing another jellyfish, Mnemiopsis leidyi, into the Black Sea. Within a few years the numbers had exploded—the population was estimated to weigh about one billion tonnes, and it completely decimated the fishing industry.

Although worldwide numbers are increasing, experts aren’t predicting a similar catastrophe involving the Turritopsis. This particular jellyfish is usually only found in small colonies, so population concentration remains quite low. Piraino, who was part of the research team that in the early ’90s discovered the species’ ability to restart its life, says that even though Turritopsis is capable of surviving in harsh environments—and has been seen restarting its life cycles up to three times, according to researchers in Japan—it’s simply too small and has too little an impact on ecosystems to be considered a threat. Plus, it appears to be quite tame compared to some of the larger, more virulent species that are carried in ballast water, such as the Mnemiopsis or the Asian clam, a small mollusc that is now clogging underwater intake pipes all over the world. The Turritopsis would only become dangerous, say experts, if the population suddenly exploded.

Piraino says the bigger issue involving the Turritopsis is unravelling its potential medical value. The next step for researchers, he says, is to begin sequencing the Turritopsis’s genome, a process that will likely take a year or two. At that point, scientists will be that much closer to understanding the mechanism that kick-starts transdifferentiation. Then, says Piraino, who knows what the potential might be.

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