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People Like Getting Thank You Notes, Research Finds
From a report: O.K., it’s not that surprising. But what did surprise two psychologist as they attempted to get to bottom of why so few people actually send thank yous is that many people totally “miscalibrate” the effect of an appreciative email. They underestimate the positive feelings it will bring. “They think it’s not going to be that big a deal,” said Amit Kumar, a professor at the University of Texas at Austin who studies well-being. They also overestimate how insincere the note may appear and how uncomfortable it will make the recipient feel, their study found. But after receiving thank-you notes and filling out questionnaires about how it felt to get them, many said they were “ecstatic,” scoring the happiness rating at 4 of 5. The senders typically guessed they’d evoke a 3. To be clear — the notes in question were not your typical “thanks for the Amazon gift card.” Rather, the 100 or so participants in each of the four experiments were asked to write a short “gratitude letter” to a person who had affected them in some way. Sample letters included missives of appreciation to fellow students and friends who offered guidance through the college admissions process, job searches and tough times. In lab experiments, Dr. Kumar observed that it took most subjects less than five minutes to write the letters. Further reading: Finding Emails With Certain Variation Of Thank You Vastly Improves Response Rate, Study Finds; and Apparently, People Say ‘Thank You’ To Self-Driving Pizza Delivery Vehicles.
of this story at Slashdot.
Source:: Slashdot
Classroom Gadget Turned Arduino Compatible
Cheap second-hand hardware is usually a fertile ground for hacking, and it looks like these digital classroom aids are no exception. [is0-mick] writes in to tell us how he managed to hack one of these devices, a Smart Reponse XE, into an Arduboy compatible game system. As it turns out, this particular gadget is powered by an ATmega128RFA, which is essentially an Arduino-compatible AVR microcontroller with a 2.4GHz RF transceiver tacked on. This makes it an extremely interesting platform for hacking, especially since they are going for as little as $3 USD on eBay.
There’s no USB-Serial converter built into the Smart Response XE, so you’ll need to provide your own external programmer to flash the device. But luckily there’s a labeled ISP connector right on the board which makes it pretty straightforward to get everything wired up.
Of course, getting the hardware working was slightly more complicated than just flashing an Arduino Sketch onto the thing. [is0-mick] has provided his bootloader and modified libraries to get the device’s QWERTY keyboard and ST7586S controlled 384×160 LCD working.
Playing games is fun, but when his friend [en4rab] sent him the Smart Response XE to fiddle with, the goal was actually to turn them into cheap 2.4 GHz analyzers similar to what was done with the IM-ME. It seems they’re well on their way, and [is0-mick] invites anyone who might be interested in filling in some of the blanks on the RF side to get involved.
Source:: Hackaday
Rome’s Subway Expansion Reveals Artifacts From The Ancient Past
All roads may lead to Rome, but once you get there, good luck taking the subway. The sprawling metropolis is expanding its mass transit system — a sluggish process made even slower as workers keep running into buried ancient ruins. From a report: “I found some gold rings. I found glasswork laminated in gold depicting a Roman god, some amphoras,” says Gilberto Pagani, a bulldozer operator at the Amba Aradam metro stop, currently under construction not far from the Colosseum. Pagani is part of an archaeological team at the site, a certified archaeological construction worker trained to excavate, preserve and build in cities like Rome, with thousands of years of civilization buried beneath the surface. The presence of ancient artifacts underground is a daunting challenge for urban developers. For archaeologists, it’s the opportunity of a lifetime. “I think it’s the luckiest thing that’s ever happened to me, professionally speaking,” says Simona Morretta, the state archaeologist in charge of the Amba Aradam site. “Because you never get the chance in a regular excavation to dig so deep. That’s how we’ve found architectural complexes as important as this.”
of this story at Slashdot.
Source:: Slashdot
Some Colleges Cautiously Embrace Wikipedia
Megan Zahneis, writing for The Chronicle of Higher Education: Academics have traditionally distrusted Wikipedia, citing the inaccuracies that arise from its communally edited design and lamenting students’ tendency to sometimes plagiarize assignments from it. Now, LiAnna Davis, director of programs for Wikipedia’s higher-education-focused nonprofit arm Wiki Education, said, higher education and Wikipedia don’t seem like such strange bedfellows. At conferences these days, “everyone’s like, ‘Oh, Wikipedia, of course you guys are here.'” “I think it’s a recognition that Wikipedia is embedded within the fabric of learning now,” she said. One initiative Davis oversees at Wiki Education aims to forge stronger bonds between Wikipedia and higher education. The Visiting Scholars program, which began in 2015, pairs academics at colleges with experienced Wikipedia editors. Institutions provide the editors with access to academic journals, research databases, and digital collections, which the editors use to write and expand Wikipedia articles on topics of mutual interest. A dozen institutions, including Rutgers University, Brown University, and the University of Pittsburgh, are participating.
of this story at Slashdot.
Source:: Slashdot
Slashdot Asks: Do You Need To Properly Eject a USB Drive Before Yanking it Out?
In a story earlier this week, Popular Science magazine explored an age-old topic: Do people need to safely eject a USB stick before they pull it from their computer? The magazine’s take on it — which is, as soon any ongoing transfer of files is complete, it is safe to yank out the flash drive — has unsurprisingly stirred a debate. Here’s what the magazine wrote: But do you really need to eject a thumb drive the right way? Probably not. Just wait for it to finish copying your data, give it a few seconds, then yank. To be on the cautious side, be more conservative with external hard drives, especially the old ones that actually spin. That’s not the official procedure, nor the most conservative approach. And in a worst-case scenario, you risk corrupting a file or — even more unlikely — the entire storage device. To justify its rationale, the magazine has cited a number of computer science professors. In the same story, however, a director of product marketing at SanDisk made a case for why people should probably safely eject the device. He said, “Failure to safely eject the drive may potentially damage the data due to processes happening in the system background that are unseen to the user.” John Gruber of DaringFireball (where we originally spotted the story), makes a case for why users should safely eject the device before pulling it out: This is terrible advice. It’s akin to saying you probably don’t need to wear a seat belt because it’s unlikely anything bad will happen. Imagine a few dozen people saying they drive without a seat belt every day and nothing’s ever gone wrong, so it must be OK. (The breakdown in this analogy is that with seat belts, you know instantly when you need to be wearing one. With USB drives, you might not discover for months or years that you’ve got a corrupt file that was only partially written to disk when you yanked the drive.) I see a bunch of “just pull out the drive and not worry about it” Mac users on Twitter celebrating this article, and I don’t get it. On the Mac you have to do something on screen when you eject a drive. Either you properly eject it before unplugging the drive — one click in the Finder sidebar — or you need to dismiss the alert you’ll get about having removed a drive that wasn’t properly ejected. Why not take the course of action that guarantees data integrity? What are your thoughts on this? Do you think the answer varies across different file systems and operating systems?
of this story at Slashdot.
Source:: Slashdot
A 3D-Printed Bowl Feeder for Tiny SMD Parts
[Andrzej Laczewski] has something big in mind for small parts, specifically SMD resistors and capacitors. He’s not talking much about that project, but from the prototype 3D-printed bowl feeder he built as part of it, we can guess that it’s going to be a pretty cool automation project.
Bowl feeders are common devices in industrial automation, used to take a big pile of parts like nuts and bolts and present them to a process one at a time, often with some sort of orientation step so that all the parts are the right way around. They accomplish this with a vibratory action through two axes, which [Andrzej] accomplishes with the 3D-printed ABS link arms supporting the bowl. The spring moment of the arms acts to twist the bowl slightly when it’s pulled down by a custom-wound electromagnet, such that the parts land in a slightly different place every time the bowl shifts. For the parts on the shallow ramp spiraling up the inside of the bowl, that means a single-file ride to the top. It’s interesting to see how changing the frequency of the signal sent to the coil impacts the feed; [Andrzej] used a function generator to find the sweet spot before settling on a dedicated circuit. Watch it in action below.
We’re really impressed with the engineering that went into this, even if we wonder what the vibration will do to the SMD components. Still, we can’t wait to see this in a finished project – perhaps it’ll be integrated like this Arduino-fied bowl feeder.
Source:: Hackaday
Which Microsoft Surface should I buy? – CNET
What was once a single device is now a full line to meet the demands of many users. Here’s how to pick the right one. …read more
Source:: CNet
D5 Creation