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The Disintegrated Op Amp

741By now we’ve all seen the ‘Three Fives’ kit from Evil Mad Scientist, a very large clone of the 555 timer built from individual transistors and resistors. You can do a lot more in the analog world with discrete parts, and [Shane]‘s SevenFortyFun is no exception: it’s a kit with a board, transistors, and resistors making a very large clone of the classic 741 op-amp, with all the parts laid bard instead of encapsulated in a brick of plastic.

[Shane] was inspired by the analog greats – [Bob Pease], [Jim Williams], and of course [Bob Wildar], and short of mowing his lawn with goats, the easiest way to get a feel for analog design was to build some analog circuits out of individual components.

[Shane] has a few more kits in mind: a linear dropout and switching regulators are on the top of the list, as is something like the Three Fives kit, likely to be used to blink giant LEDs.


Filed under: Crowd Funding, hardware

Hackaday Reader [David] Wins a Camera from Make and Nikon

maketheshot

[David Schwarz] whipped up this moving time-lapse camera rig and won himself a sweet Nikon setup. You might remember our post about the Nikon Make:The Shot Challenge. [David] saw our post, and started thinking about what he wanted to enter. Like a true engineer, he finally came up with his idea with just 3 days left in the contest.

[David] wanted to build a moving time-lapse rig, but he didn’t have the aluminum extrusion rails typically used to build one. He did have some strong rope though, as well as a beefy DC motor with a built-in encoder. [David] mounted a very wide gear on the shaft of the motor, then looped the rope around the gear and two idler pulleys to ensure the gear would have a good bite on the rope. The motor is controlled by an Arduino, which also monitors the encoder to make sure the carriage doesn’t move too far between shots.

[6__pulley_systemDavid] built and tested his rig over a weekend. On Monday morning, he gave the rig its first run. The video came out pretty good, but he knew he could get a better shot. That’s when Murphy struck. The motor and controller on his rig decided to give up the ghost. With the contest deadline less than 24 hours away, [David] burned the midnight oil and replaced his motor and controller.

Tuesday morning, [David] pulled out his trump card – a trip to Tally Lake in Montana, USA. The equipment worked perfectly, and nature was cooperating too. The trees, lake, and the shadows on the mountains in the background made for an incredible shot. Once the time-lapse photos were in the can, [David] rushed home, stitched and stabilized the resulting video. He submitted his winning entry with just 2 hours to spare.

Click past the break for more on [David's] time-lapse rig, and to see his final video.

There was some stiff competition, entries like [Matt's] mirror-less camera based 8mm film converter and [Pat's] Arduino powered flash sequencer gave him a real run for his money. In the end though, the time-lapse rig won. We want to congratulate [David] on winning Make and Nikon’s contest. We love seeing members of the Hackaday community setting the bar for competitions everywhere. We’re also sending [David] a Hackaday t-shirt and some other goodies. Hopefully he’s already working on an entry for The Hackaday Prize.


Filed under: digital cameras hacks

Journal that published Facebook’s secret ‘contagion’ study questions Facebook’s ethics

Journal that published Facebook's secret 'contagion' study questions Facebook's ethics

How can you leverage mobile to increase profitability for your company? Find out at MobileBeat, VentureBeat's 7th annual event on the future of mobile, on July 8-9 in San Francisco. There are only a few tickets left!

A scientific journal that published the findings of a secret experiment loosed on 700,000 unsuspecting Facebook users to study their moods last year, but which came to light this week, has big problems with the way it was conducted.

The findings were published in the Proceedings of National Academy of Sciences, which said the study may have violated important ethics in the methodology of social and academic research.

The journal’s editor in chief Inder Verma told  the Guardian, “It is nevertheless a matter of concern that the collection of the data by Facebook may have involved practices that were not fully consistent with the principles of obtaining informed consent and allowing participants to opt out.”

Facebook’s chief operating officer Sheryl Sandberg offered an apology Wednesday, but some questioned it as too little, too late.

The emergence of the secret study triggered a firestorm of criticism around the globe. And it was disclosed Thursday that British privacy regulators are now investigating the secret study in which Facebook researchers injected disconsolate information into user’s news feeds to see if it made them sad.

Facebook did not return multiple calls for comment.

The bigger question perhaps is whether Facebook has any similar such studies in its pipeline. At least that’s the question Dr. Andy Carle, an expert in computer human interaction, has. He said at the very least Facebook should have notified the subjects in question that they were being included in the study.

And he thinks more studies similar to the one revealed this week are already in the pipeline.

"I have no doubt they will continue with these studies," he told VentureBeat. "This worries me, the culture of user research at Facebook. At the very least they should have been notified. The question is, what else is Facebook doing now?


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Facebook is the world's largest social network, with over 1.15 billion monthly active users. Facebook was founded by Mark Zuckerberg in February 2004, initially as an exclusive network for Harvard students. It was a huge hit: in 2 w... read more »








Not all creepy: 3 important findings from Facebook’s emotional experiments


How can you leverage mobile to increase profitability for your company? Find out at MobileBeat, VentureBeat's 7th annual event on the future of mobile, on July 8-9 in San Francisco. There are only a few tickets left!

Facebook is in hot water for manipulating user’s emotions for mass study that explored the contagious effects of positive and negative news stories. The Wall Street Journal reports that the well-publicized experiment was just the tip of the iceberg for Facebook’s fast research data science team. “There’s no review process, per se,” Andrew Ledvina, a Facebook data scientist from 2012 to 2013, told the Journal. “They’re always trying to alter peoples’ behavior”
But, before we break out the pitch forks, it’s important to remember that Facebook does discovery really useful information.

Democracy

For instance, in one of the first large-scale experiments, a University of California San Diego researcher discovered that they could increase civic engagement through “I voted” badges on election day. Facebook badges, alone, can boost voter turnout 2.2 percent, which is about a fourth the effect of face-to-face canvassing. Canvassing, however, is much (much) more expensive and labor intensive.

For campaigns on a budget looking at how to spread a civic message, Facebook could be a good deal.

To be sure, the messages that pass through Facebook can save lives. Back when Facebook decided to add organ donor status as a sharable message, over 13,000 people signed up on the first day, and registration kept apace at double the normal rate for some time after. Figuring out how to message this issue properly could mean more signups, and hence, lived saved.

Loneliness & suicide

Loneliness is a modern disease, depression and suicide the modern epidemics. Those cut off from the world often find solace online and Facebook data scientists have discovered the clues to identifying lonely people in the texts and behaviors of it’s users.

“Users who consume greater levels of content” finds one academic study from Facebook, report lower levels of offline social activity “and increased loneliness”. Binge-viewing of content is an important warning sign.

The military is interested in using this kind of information to detect depression and suicide in veterans. The Durkheim project will collect social media and mobile data from a voluntary group of veterans to see if they can spot the early warning signs of mental illness, and eventually swoop in to prevent the worst scenarios.

Helping

Facebook can be an incredibly useful tool for anyone apartment hunting or in need of parenting advice. And, their data scientists have been busy studying what kinds of requests are more likely to receive a response, and hence, get prioritized in the news feed.

“The chance of getting a response was substantially higher for factual knowledge and recommendation requests, and the chance for favor/requests substantially lower, as compared to mobilizations overall,” reports one Facebook team.

The implications of this are important: perhaps rephrasing a call to action would be more helpful if users requested information on anyone who would be willing to help out a cause.

These kinds of practical tips make Facebook all the more useful for bridging online distribution with offline help. And, it only happens when Facebook conducts research.

A more transparent Facebook

University of Wisconsin law professor Ryan Calo has recommended the creation of “Consumer Subject Review Boards”, which review the research of private companies. It’s akin to the Institutional Review Boards (IRBs) already standard at every major university.

I met Professor Calo last week at the Atlantic Aspen Ideas festival; he later wrote to me, “I think Facebook would have fared better under this regime because they would have had a set of established criteria as well as a record of when and why it was approved.”

With consumer review boards, Facebook can be much more transparent about their research and be assured that someone is monitoring them for potentially harmful studies.

We want Facebook to conduct research, but they can’t just toy with people’s emotions in secret without being accountable for the consequences.


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Both Google co-founders reveal beliefs on rent, privacy, taxes, law, & future tech (in 7 quotes)

Both Google co-founders reveal beliefs on rent, privacy, taxes, law, & future tech (in 7 quotes)

It’s rare to get one Google co-founder to speak publicly, let alone both at the same time. But noted venture capitalist and longtime friend Vinod Khosla managed to get both Google co-founders to reveal their thoughts on everything from novel government policies to the future of technology.

Here is how two of the most powerful technologists in the world imagine the future.

Tax waste, improve efficiency

Sergey Brin says it’s kosher for the government to eliminate waste and bad behavior through taxes.

I think ideally, one would try to tax more of the things that we don’t want, and either subsidize or encourage the things that we do want. The kinds of things people spend money on that are wasteful, you can imagine having higher taxes on. Or things that are harmful, like carbon, could be taxed at a higher rate. On the one hand, presumably it will slow wasteful spending.

Unnecessary work for everyone, part-time

Larry Page says he’s optimistic that robots will usher in a world of abundance and eliminate much of the work we do today. In the past, he argues, most people were farmers, but thanks to machines, they can dedicate themselves to other pursuits. However, the robot work-apocalypse needs to be balanced with the desire for people to feel apart of a productive economy.

Most people like working, but they’d also like to have more time with their family or to pursue their own interests. So that would be one way to deal with the problem, is if you had a coordinated way to just reduce the work week. And then, if you add slightly less employment, you can adjust and people will still have jobs.

A limit on the number of laws

Larry Page evidently wants governments to put a ceiling on the number of laws. As a global company, he estimates that Google has to comb through millions of laws and come up with a complex system to adhere to them all.

One thing I propose is that– I was talking to some government leaders. I said — actually to the President of South Korea. It was great. I said, ‘Hey, why don’t you just limit your laws and regulations to some set of pages? And when you add a page, you have to take one away.’ She actually wrote this down. She’s great.

Get rid of HIPAA

I’ve written extensively about Larry Page’s desire to save lives through a public database of health information. The law currently holding back the ability of researchers to mine health information is the Health Insurance Portability and Accountability Act (HIPAA), which puts strict regulation on patient privacy.

Imagine you had the ability to search people’s medical records in the U.S.. Any medical researcher can do it. Maybe they have the names removed. Maybe when the medical researcher searches your data, you get to see which researcher searched it and why. I imagine that would save 10,000 lives in the first year. Just that. That’s almost impossible to do because of HIPPA. I do worry that we regulate ourselves out of some really great possibilities that are certainly on the data-mining end.

For good measure, Sergey Brin noted that the company’s blood glucose monitoring contact lens is “coming along pretty well”.

The problem with rent control

Rent control is the only thing saving many San Franciscans from getting booted out of their homes, thanks to skyrocketing housing prices. Page seemed to imply that because San Francisco has refused to build enough housing, rent control laws ultimately end up hurting the poor, because they’ve never been able to own a home.

We’re building lots of jobs, lots of office buildings, and no housing. So it’s not surprising that caused a lot of issues. You also have a lot of people who are rent controlled, so they don’t participate in the economic increase in housing prices. It actually hurts them. It doesn’t help them. So I think those problems are more structural and very serious problems. We’re not really on a path to fix those problems in this area.

Robots better than humans

With the acquisition of artificial intelligence firm, DeepMind, Sergey Brin foresees building machines that are, in some ways, much better than humans.

We do have lots of proof points that one can create intelligent things in the world because– all of us around. Therefore, you should presume that someday, we will be able to make machines that can reason, think and do things better than we can.

Read the full transcript of the talk here, or watch it below:


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Driving commerce with mobile: increasing savings & shortening in-store visits

Driving commerce with mobile: increasing savings & shortening in-store visits
Image Credit: The Next Web

Walmart has sought to revolutionize the in-store experience by adding navigation, voice commands, shopping lists, price comparisons, and other useful tools to its mobile applications.

At next week’s MobileBeat — July 8-9 in San Francisco — Walmart’s global head of mobile, Gibu Thomas, will talk about how those efforts have resulted in the company’s growth. He’ll also give people a sense of where Walmart is heading next in mobile and how it might drive top-line growth.

Session Speaker:

Gibu Thomas

Gibu Thomas, SVP of Mobile & Digital, Walmart

While Walmart relies on some external providers for specific functions, it has the scale, vertical integration and talent to build most of its mobile services in-house. The world’s first retailer has been early to adopt mobile technologies. While realizing that mere presence in the App Stores and even basic e-commerce features are now table stakes for the brand, they mostly focus their effort on building the blocks of a new hybrid shopping experience.

That is, Gibu Thomas and his team work on features that support shoppers’ journeys by layering the mobile experience on top of trips to the store, instead of trying to replacing it. Certainly the ability to browse items from the go creates the ability for the ubiquitous stores of the chain to act as fulfillment and pick-up centers for specific errands, but they keep in mind that a lot of the browsing will still happen in-store.

Their strategy is to provide on Walmart’s app the value customer expect from their device, be it the ability to compare prices, jot down notes of things to buy or look for product availability. By carefully listening to their customers needs and iterating on these features, Walmart is building a truly hybrid shopping experience.

Thomas will describe some of the current paradigms of their shopping assistant they hope the app will become, like how the awareness of shopper locations enables the app to switch from an “on-the-go” to an “in-store” mode automatically, surfacing the services users are most likely to need. E-receipts automatically saved also users to easily find past purchases, and will constitute the foundation for more services to come that enhance the experience of everyday shopping.

Note: MobileBeat tickets are nearly gone. Grab yours before they sell out!

Join 1,000 mobile execs, leading brands, analysts, developers, investors, and press for two days packed with high-value discussions, actionable lessons, exclusive announcements, and lots of networking.

We encourage you to secure your spot before the holiday, as tickets are very limited. You can register here.

Special thanks to the following industry leaders for supporting MobileBeat: Factual, Tapjoy, Criteo, AppLovin, Adtile, IBM and AT&T as Gold Partners; Flurry, AppMachine, HasOffers, Sequoia Capital, RadiumOne, SupersonicAds, Cirrus Insight, Tapsense, AppsFlyer and App Annie as Silver Partners; AppDynamics, BlueStacks, Upsight, Cotap, Cail, New Relic, Splunk, GLOBO, Bitcasa, Crittercism, and LifeStreet Media as Event Partners; Adenda, CommandIQ, Raw Engineering, Obelus Media, and Rumble as Nest Partners, and Bizzabo and VSC as Strategic Partners.








Dell starts Founders Club 50 for tech entrepreneurs

Dell starts Founders Club 50 for tech entrepreneurs

Above: We'd rather talk about these startups than play with our Christmas toys.

Image Credit: Shutterstock

Dell this week announced Founders Club 50, a two-year program designed to give 50 startups a significant boost. According to Joyce Mullen, Dell’s vice president, eligible companies must use technology as an essential component of thier operations and be fully prepared for growth.

Getting into the program requires either a direct application or a nomination from Dell’s sales teams or an investment firm. This makes sense since most of the companies that made the first class already have venture capitalists or angel investors backing them.

Once accepted to Founders Club 50, startups get access to consulting to improve how they handle technology as they scale up. Some may even receive financing through The Dell Innovators Credit Fund, which offers $100 million in financing to qualifying entrepreneurs.

The Spring 2014 class is currently in progress and includes the likes of SimpleRelevance, an email optimization platform designed to create customized email messages automatically; Ihiji, a “cloud-based remote network solution for IT professionals”; and Raise, a marketplace for buying and selling gift cards. Dell is currently accepting applications for the Fall 2014 class of Founders Club 50.

This is not the first time Dell has lent a helping hand to entrepreneurs. In 2011, it launched the Entrepreneur in Residence program. The company also created a Center for Entrepreneurs. Dell was founded in 1984 and went public in July 1988. The company is headquartered in Round Rock, TX and currently has 80,000 employees.

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Dell has played a critical role in enabling more affordable and accessible technology around the world. As an end-to-end computing solutions company, Dell continues to transform computing and provide high quality solutions that empower... read more »

Raise is an online marketplace for buying and selling gift cards. Members can create an account on the site and use it to either sell unwanted gift cards or buy gift cards from other members. Because of the marketplace format, the list... read more »