Slashdot Mirror

Researchers from the University of Massachusetts, Amherst, have developed a new method of harvesting electricity from body heat to power wearable devices. "The new, wearable thermoelectric generator is also sourced from non-toxic and non-allergenic substances, making it a viable candidate for wearable technology," reports IEEE Spectrum. Furthermore, "the substrate on which the generator is built is plain old cotton fabric." From the report: More precisely, it's a vapor-deposited strip of cotton fabric -- coated with a material called, brace yourself, "persistently p-doped poly(3,4-ethylenedioxythiophene)" a.k.a. PEDOT-Cl. One end of the fabric touches a person's skin and is thus at a person's body temperature. The other end, ideally, is exposed to the open air. The greater the difference in temperature between the two ends, the greater the electrical output. [...] The innovation here was to vapor deposit their polymer only onto the surface of the cotton fibers -- and not soak the entire cloth in the polymer.

By keeping the semiconducting material on the surface, they could allow for charge to flow through the material while still thermally insulating one end of the generator from the other. This stems from the competing demands of a good thermoelectric conductor. The ideal material must somehow keep one side hot and the other side cold -- in other words, the material must be thermally insulating. However, it must at the same time conduct electrons. Electrical current needs to flow, or it's not a very good generator. With this vapor deposition trick, she says, "The polymer can be really, really electrically conductive." And PEDOT-Cl fills that bill. However, because the polymer is only coated on the outer surface of the cotton fibers, the bulk of the material (i.e. the cotton) is still able to perform its thermally insulating role. The research has been published in the journal Advanced Materials Technologies.

Thelasko shares a report from Electrek: Tesla hasn't been known for making many acquisitions, but we've now learned that it has reached an agreement to acquire ultracapacitor and battery component manufacturer Maxwell based in California. The all-stock transaction worth over $200 million was announced by Maxwell this morning and we reached out to Tesla to confirm the news. [...] Tesla's acquisition of Maxwell might have little to do with ultracapacitors. The automaker might be more interested with Maxwell's dry electrode technology that they have been hyping recently. Maxwell claims that its electrode enables an energy density of over 300 Wh/kg in current demonstration cells and they see a path to over 500 Wh/kg. This would represent a significant improvement over current battery cells used by Tesla and enable longer range or lighter weight, but that's not even the most attractive benefit of Maxwell's dry electrode. They claim that it should simplify the manufacturing process and result in a "10 to 20% cost reduction versus state-of-the-art wet electrodes" while "extending battery Life up to a factor of 2." Many companies have been making similar claims about batteries. Tesla, specifically Elon and JB, have often complained that they couldn't verify those claims. If Tesla is willing to pay $200 million for Maxwell, I have to assume that they verified the claims and they believe the technology is applicable to their batteries. On a semi-related note, Tesla has also reached a deal with Electrify America to deploy Powerpacks at over 100 charging stations operated by the latter. "Demand charges, a higher rate that an electric utility charges when a user's electricity needs spike, are resulting in incredible costs for charging station operators," reports Electrek. "The use of energy storage at charging stations in order to shave the peak usage is a solution to those demand charges."

"[Electrify America] announced today that they will deploy Tesla Powerpack systems consisting of 'a 210 kW battery system with roughly 350 kWh of capacity' at over 100 charging stations," the report says. "The system will be designed to be modular in order to increase the capacity if needed."

The UK's CO2 emissions peaked in the year 1973 and have declined by around 38% since 1990, faster than any other major developed country. From a report: The most significant factors include a cleaner electricity mix based on gas and renewables instead of coal, as well as falling demand for energy across homes, businesses and industry. Declines in the UK's CO2 have persisted despite an economic recovery from the financial crisis a decade ago. Where earlier reductions were largely negated by rising imports, the past decade has seen genuine cuts in the amount of CO2 for which the UK is responsible. The factors driving emission reductions will likely continue into the future as the UK's remaining coal use is phased out by 2025.

Scammers are reportedly using YouTube's "three strike" system for extortion. "After filing two false claims against [YouTuber ObbyRaidz], scammers contacted him demanding cash to avoid a third -- and the termination of his channel," reports TorrentFreak. From the report: The YouTuber, who concentrates on Minecraft-related videos, reports that he's received two bogus strikes on his account. While this is nothing new, it appears the strikes were deliberately malicious with longer-term plan to extort money from him. "I have been striked twice and basically extorted," ObbyRaidz revealed this morning. "If I don't pay this dude he's going to strike a third one of my videos down."

The alleged scammer contacted ObbyRaidz, who lives in Texas, via Twitter. He or she warned the YouTuber that unless he paid a sum via PayPal or bitcoin, another complaint and therefore a third strike would be added to his account. "Hi Obby, We striked you," the message from "VengefulFlame" begins. "Our request is $150 PayPal or $75 btc (Bitcoin). You may send the money via goods/services if you do not think we will cancel or hold up our end of the deal. "Once we receive our payment, we will cancel both strikes on your channel. Again -- you are free to charge back if we don't but we assure you we will." The YouTuber was then granted "a very short amount of time" to make his decision whether to pay the amount or potentially lose his channel. The YouTuber goes on to say that YouTube has not provided any assistance resolving this problem. "It's very unfortunate and YouTube has not done very much for me. I can't get in contact with them. One of the appeals got denied," he explains.

Due to an economic slowdown in China and diminishing demand for new iPhones, Apple's profits in its most recent quarter were flat compared with a year earlier. "The disappointing financial performance had been expected since Jan. 2, when Apple, for the first time in 16 years, revised its forecast for the quarter," reports The New York Times. "But the announcement on Tuesday indicates a difficult road head for Apple, which just five months ago became the first company to be worth more than $1 trillion. The company said it expected between $55 billion and $59 billion in revenue in the current quarter, just below analysts' expectations for $59 billion. Apple's earnings per share were $4.18, beating analysts' expectations by a penny."

In addition to the quarterly earnings, Apple reported revenue of $84.3 billion, a decline of 5 percent from one year ago. "Revenue from iPhone declined 15 percent from the prior year, while total revenue from all other products and services grew 19 percent," Apple said in a press release. Analysts had estimated revenue of $83.97 billion and earnings of $4.17 per share. "While it was disappointing to miss our revenue guidance, we manage Apple for the long term, and this quarter's results demonstrate that the underlying strength of our business runs deep and wide," said Tim Cook. Apple's active install base of 1.4 billion is "a great testament to the satisfaction and loyalty of our customers, and it's driving our services business to new records thanks to our large and fast-growing ecosystem," Cook said. The Verge adds: "iPhones account for 900 million of those devices. iPad revenues were up 17 percent against the year-ago quarter; Mac was up 9 percent; and Wearables/Home/Accessories were up by 33 percent."

New research reviewed in the journal Frontiers in Physiology suggests that muscle nuclei -- the factories that power new muscle growth -- could give older muscles an edge in regaining fitness later on. "Muscles need to be versatile to meet animals' needs to move," reports NPR. "Muscle cells can be sculpted into many forms and can stretch to volumes 100,000 times larger than a normal cell. Muscle cells gain this flexibility by breaking the biological norm of one nucleus to a cell; some muscle cells house thousands of nuclei. In mammals, these extra nuclei come from stem cells called satellite cells that surround the muscle. When demands on the muscle increase, these satellite cells fuse with muscle cells, combining their nuclei and paving the way for more muscle." From the report: Physiologists had thought that a single nucleus supported a certain volume of cell. As a muscle cell grew, it needed more nuclei to support that extra volume. But as a muscle shrinks from lack of use, it gets rid of those unnecessary extra nuclei. This view found support in studies that found nuclei were scrapped as muscles atrophied. But [Kristian Gundersen, a muscle biologist from the University of Oslo] and [Lawrence Schwartz, a biologist at the University of Massachusetts] say those experiments overlooked what was really happening.

Take a cross section of muscle tissue and you'll find a sort of marbled mishmash of muscle cells surrounded by numerous other cell types, such as satellite cells and fibroblasts. Researchers could have been measuring the death of cells that support muscle and incorrectly inferred that muscle cells lose their nuclei, according to Gundersen and Schwartz. Gundersen and colleagues developed another method that zoomed in on individual muscle cells. The researchers injected a stain into muscle cells that mice use to flex their toes. The stain spreads throughout the muscle cells, illuminating their nuclei. Gundersen could then track the nuclei over time as he induced muscle growth by giving the mice testosterone, a steroid hormone. Later, after stopping the testosterone, he could watch what happened as those muscles atrophied. Unsurprisingly, testosterone boosted nuclei number. But those extra nuclei stuck around, even as the muscle shrank by half. Gundersen thinks the results contradict the dogma that nuclei disappear when muscles atrophy. "Nuclei are lost by cell death," he says, "just not the actual muscle nuclei that confer strength." What's more, he says these retained extra nuclei might explain how a muscle remembers its past fitness.

Roughly a day after users in China began complaining that they were unable to access Bing, stoking fear that perhaps Microsoft's search engine is joining the long list of services that will not be permitted by the local government, Microsoft says it has fixed the situation. From a report: Bing is accessible in China again. In a statement, a Microsoft spokesperson said, "We can confirm that Bing was inaccessible in China, but service is now restored." Microsoft did not offer an explanation for Bing's outage, but in a televised interview with Fox News at the World Economic Forum, company president Brad Smith addressed the matter. He noted that this is not the first time Bing has faced an outage in China. "It happens periodically."

He added, "You know, we operate in China pursuant to some global principles that's called the Global Network Initiative in terms of how we manage censorship demands and the like. There are times when there are disagreements, there are times when there are difficult negotiations with the Chinese government, and we're still waiting to find out what this situation is about."

Lured by the prospect of high-salary, high-status jobs, college students are rushing in record numbers to study computer science. Now, if only they could get a seat in class. An anonymous reader shares a report: On campuses across the country, from major state universities to small private colleges, the surge in student demand for computer science courses is far outstripping the supply of professors, as the tech industry snaps up talent. At some schools, the shortage is creating an undergraduate divide of computing haves and have-nots -- potentially narrowing a path for some minority and female students to an industry that has struggled with diversity. The number of undergraduates majoring in the subject more than doubled from 2013 to 2017, to over 106,000, while tenure-track faculty ranks rose about 17 percent, according to the Computing Research Association, a nonprofit that gathers data from about 200 universities.

Economics and the promise of upward mobility are driving the student stampede. While previous generations of entrepreneurial undergraduates might have aspired to become lawyers or doctors, many students now are leery of investing the time, and incurring six-figure debts, to join those professions. By contrast, learning computing skills can be a fast path to employment, as fields as varied as agriculture, banking and genomics incorporate more sophisticated computing. While the quality of programs across the country varies widely, some computer science majors make six-figure salaries straight out of school. At the University of Texas at Austin, which has a top computer science program, more than 3,300 incoming first-year students last fall sought computer science as their first choice of major, more than double the number who did so in 2014.

The latest in the Huawei saga, which is increasing tension between the U.S. and China. WSJ reports about a remarkable event: Confronted with U.S. accusations of cyber espionage, Chinese companies and government officials often accuse Washington of hypocrisy, pointing to allegations in 2013 by former NSA contractor Edward Snowden that the U.S. had been hacking into key Chinese networks for years. Western officials say systems of checks and balances in their countries allow for companies to challenge those demands, unlike in China.

To further highlight that difference, U.S. officials have repeatedly pressed Chinese companies to demonstrate to them one example of a time they resisted a request for data from the Chinese government, but they have never done so, according to a person familiar with those conversations. U.S. intelligence officials have suggested at times that their views on Huawei are informed by definitive examples of malfeasance, though they have so far refused to share such evidence publicly. When the House Intelligence Committee in 2012 published an unclassified report naming Huawei as a security risk, it spoke generally about a lack of trust lawmakers placed in China but steered clear of providing concrete examples of the company being caught engaging in nefarious activity.

Google is considering pulling its Google News service from Europe as regulators work toward a controversial copyright law. From a report: The European Union's Copyright Directive will give publishers the right to demand money from Alphabet, Facebook and other web platforms when fragments of their articles show up in news search results, or are shared by users. The law was supposed to be finalized this week but was delayed by disagreement among member states.

Google News might quit the continent in response to the directive, said Jennifer Bernal, Google's public policy manager for Europe, the Middle East and Africa. The internet company has various options, and a decision to pull out would be based on a close reading of the rules and taken reluctantly, she said. "The council needs more time to reflect in order to reach a solid position" on the directive, said a representative of Romania, current head of the European Council, which represents the 28 member nations.

An anonymous reader quotes a report from ZDNet: A prolific cybercrime gang behind a series of ransomware attacks is distributing a new form of the file-encrypting malware which combines two well known and successful variants in a series of attacks against businesses around the world. Dubbed Phobos by its creators, the ransomware first emerged in December and researchers at CoveWare have detailed how it shares a number of similarities with Dharma ransomware.

Like Dharma, Phobos exploits open or poorly secured RDP ports to sneak inside networks and execute a ransomware attack, encrypting files and demands a ransom to be paid in bitcoin for returning the files, which in this case are locked with a .phobos extension. The demand is made in a ransom note -- and aside from 'Phobos' logos being added to the ransom note, it's exactly the same as the note used by Dharma, with the same typeface and text use throughout. Phobos is being distributed by the gang behind Dharma and likely serves as an insurance policy for malicious campaigns, providing attackers with a second option for conducting attacks, should Dharma end up decrypted or prevented from successfully extorting ransoms from victims.

From a report: While our ears may be attuned to lossy compressed audio in most everyday scenarios, the experience of rediscovering high-fidelity lossless digital audio can be nothing short of a revelation. Fine details reappear, performers have more space, sounds have more definition, audio feels warmer, sounds clearer, and is noticeably more pleasurable to listen to. The higher you go with audio file resolution, the better it gets. Thanks to the new range of streaming apps delivering CD-quality or higher, our beloved "universal jukebox" is undergoing a significant upgrade.

Consumer demand for high-resolution audio has been growing steadily, for example users of Deezer HiFi have increased by 71% in the past 12 months alone, and the product is now available in 180 countries and works with a wide range of FLAC streaming compatible devices. Bang & Olufsen's most senior Tonmeister (sound engineer) Geoff Marti believes that demand for hi-fi streaming audio is growing due to a rise in the number of people buying high-end audio devices. "It used to be that you bought an iPhone and you used the white earbuds, but nowadays people are upgrading to better headphones, so they want a better file and a better app to play it on. The potential is there for somebody that wants to get high quality, and they don't have to spend a lot of money to get it."

On Friday, a coalition of Chinese, Tibetan, Uighur, and human rights groups organized demonstrations outside Google's offices in the U.S., U.K., Canada, India, Mexico, Chile, Argentina, Sweden, Switzerland, and Denmark, protesting the company's plan to launch a censored version of its search engine in China. The Intercept reports: Google designed the Chinese search engine, code-named Dragonfly, to blacklist information about human rights, democracy, religion, and peaceful protest, in accordance with strict rules on censorship in China that are enforced by the country's authoritarian Communist Party government. In December, The Intercept revealed that an internal dispute had forced Google to shut down a data analysis system that it was using to develop the search engine. This had "effectively ended" the project, sources said, because the company's engineers no longer had the tools they needed to build it.

But Google bosses have not publicly stated that they will cease development of Dragonfly. And the company's CEO Sundar Pichai has refused to rule out potentially launching the search engine some time in the future, though he has insisted that there are no current plans to do so. The organizers of Friday's protests -- which were timed to coincide with Internet Freedom Day -- said that they would continue to demonstrate "until Google executives confirm that Project Dragonfly has been canceled, once and for all." Google "should be connecting the world through the sharing of information, not facilitating human rights abuses by a repressive government determined to crush all forms of peaceful online dissent," said Gloria Montgomery, director at Tibet Society UK. "Google's directors must urgently take heed of calls from employees and tens of thousands of global citizens demanding that they immediately halt project Dragonfly. If they don't, Google risks irreversible damage to its reputation."

Tesla CEO Elon Musk announced today that the company would cut 7% of its workforce in order to cut costs as the company prepares to ramp up production and boost margins as they get closer to releasing the long-awaited $35,000 version of the Model 3. CNBC reports: Musk says Tesla faces "an extremely difficult challenge" in making their products a competitive alternative to traditional vehicles, adding that he expects Q4 profit to come in significantly lower than Q3. Five experts weigh in on whether it's a challenge Musk and Tesla can overcome:

- Oppenheimer managing director Colin Rusch agrees with Jed Dorsheimer on Tesla's job cuts, but isn't bullish on what they'll accomplish.
- Canaccord Genuity's Jed Dorsheimer thinks the workforce cut is just fine, calling it "clean-up" after the company's latest push to ramp up Model 3 production came with a wealth of new hires.
- "They're certainly in a better position than they were eight or nine months ago," says ROTH Capital's Craig Irwin. "Where we're going to see pressure on the stock today is the 'copy-paste' expectations of Q3 going through 2019 need to be reset."
- Needham's Raji Gil thinks that Tesla may have overestimated how many people can actually afford a high-end electric vehicle. "Clearly, in my mind, they have an issue with demand," says Rusch, " If you do the math, you have to conclude that 90 percent of the reservations that have been built up over the past couple of years are folks that wanted the standard battery version of the vehicle, which is $35,000."
- Westly Group founder Steve Westly loves where Elon Musk's company is right now, calling Tesla "the iPhone of electric vehicles," and saying they're well ahead of the game when it comes to a quickly-changing auto market.

Last week, Ars Technica reported that Verizon's new "spam" fee for texts sent from teachers to students might stop working on the network because of a dispute over texting fees that Verizon demanded from Remind, the company that operates the service. Now, it appears that Verizon "has backed down from its original position slightly, and ongoing negotiations could allow the free texting service to continue," reports Ars. From the report: As we reported Monday, the dispute involves Verizon and Remind, which makes a communication service used by teachers and youth sports coaches. Verizon is charging an additional fee, saying the money will be used to fund spam-blocking services. The fee would increase Remind's costs for sending texts to Verizon users from a few hundred thousand dollars to several million dollars per year, Remind said. Remind said it would absorb the cost in order to continue providing the paid version of its service. But most of Remind's 30 million users rely on the free version of the service, and Remind said it could no longer provide free text message notifications over Verizon's network unless the fee is reversed.

Verizon issued an announcement today, titled "App provider Remind threatens to eliminate a free texting service for K-12 education organizations (which will cost it nothing)." The title reflects a new offer Verizon said it made on Tuesday, which would reverse the fee for K-12 users of the free Remind service. "Verizon will not charge Remind fees as long as they don't begin charging K-12 schools, educators, parents and students using its free text message service," Verizon said. "Despite this offer, made Tuesday, Remind has not changed its position that it will stop sending free texts to Verizon customers who use the service regarding school closures, classroom activities and other critical information." The report goes on to note that simply limiting the offer to K-12 users means the fee "would still be charged for preschools, day-care centers, and youth sports coaches who use the free Remind service."

Apple's chief executive has called for regulation to tackle the "shadow economy" of data brokers -- intermediaries who trade in the personal information of largely unsuspecting consumers -- as the company continues its push to be seen as supportive of privacy. Tim Cook, in an op-ed for Time Magazine published on Thursday, said: One of the biggest challenges in protecting privacy is that many of the violations are invisible. For example, you might have bought a product from an online retailer -- something most of us have done. But what the retailer doesn't tell you is that it then turned around and sold or transferred information about your purchase to a "data broker" -- a company that exists purely to collect your information, package it and sell it to yet another buyer. The trail disappears before you even know there is a trail. Right now, all of these secondary markets for your information exist in a shadow economy that's largely unchecked -- out of sight of consumers, regulators and lawmakers.

Let's be clear: you never signed up for that. We think every user should have the chance to say, "Wait a minute. That's my information that you're selling, and I didn't consent." Meaningful, comprehensive federal privacy legislation should not only aim to put consumers in control of their data, it should also shine a light on actors trafficking in your data behind the scenes. Some state laws are looking to accomplish just that, but right now there is no federal standard protecting Americans from these practices. That's why we believe the Federal Trade Commission should establish a data-broker clearinghouse, requiring all data brokers to register, enabling consumers to track the transactions that have bundled and sold their data from place to place, and giving users the power to delete their data on demand, freely, easily and online, once and for all.

Joshua S. Goldstein, a professor emeritus of international relations at American University, and Staffan A. Qvist, an energy engineer and consultant, writing for The Wall Street Journal: Climate scientists tell us that the world must drastically cut its fossil fuel use in the next 30 years to stave off a potentially catastrophic tipping point for the planet. Confronting this challenge is a moral issue, but it's also a math problem -- and a big part of the solution has to be nuclear power. Today, more than 80% of the world's energy comes from fossil fuels, which are used to generate electricity, to heat buildings and to power car and airplane engines. Worse for the planet, the consumption of fossil fuels is growing quickly as poorer countries climb out of poverty and increase their energy use. Improving energy efficiency can reduce some of the burden, but it's not nearly enough to offset growing demand.

Any serious effort to decarbonize the world economy will require, then, a great deal more clean energy, on the order of 100 trillion kilowatt-hours per year, by our calculations -- roughly equivalent to today's entire annual fossil-fuel usage. A key variable is speed. To reach the target within three decades, the world would have to add about 3.3 trillion more kilowatt-hours of clean energy every year. Solar and wind power alone can't scale up fast enough to generate the vast amounts of electricity that will be needed by midcentury, especially as we convert car engines and the like from fossil fuels to carbon-free energy sources. Even Germany's concerted recent effort to add renewables -- the most ambitious national effort so far -- was nowhere near fast enough. A global increase in renewables at a rate matching Germany's peak success would add about 0.7 trillion kilowatt-hours of clean electricity every year. That's just over a fifth of the necessary 3.3 trillion annual target.

An anonymous reader quotes a report from Ars Technica: A free texting service used by teachers, students, and parents may stop working on the Verizon Wireless network because of a dispute over texting fees that Verizon demanded from the company that operates the service. As a result, teachers that use the service have been expressing their displeasure with Verizon. Remind -- the company that offers the classroom communication service -- criticized Verizon for charging the new fee. Remind said its service's text message notifications will stop working on the Verizon network on January 28 unless Verizon changes course. (Notifications sent via email or via Remind's mobile apps will continue to work.) The controversy cropped up shortly after a Federal Communications Commission decision that allowed U.S. carriers' text-messaging services to remain largely unregulated. Verizon says the fee must be charged to fund spam-blocking services. Remind said in a statement: "To offer our text-messaging service free of charge, Remind has always paid for each text that users receive or send. Now, Verizon is charging Remind an additional fee intended for companies that send spam over its network. Your Remind messages aren't spam, but that hasn't helped resolve the issue with Verizon. The fee will increase our cost of supporting text messaging to at least 11 times our current cost -- forcing us to end free Remind text messaging for the more than 7 million students, parents, and educators who have Verizon Wireless as their carrier."

Intel has been trying to fill the most prominent role in the $400-billion chip industry for more than six months. The company's board still hasn't found what it's looking for. From a report: Intel directors have ruled out some candidates for the vacant chief executive officer post, passed up obvious ones, been rejected by some and decided to go back and re-interview others, extending the search, according to people familiar with the process. Chairman Andy Bryant told some employees recently that the chipmaker may go with a "non-traditional" candidate, suggesting a CEO from outside the company is a possibility.

Whoever is chosen will take the reins at a company that's churning out record results, but is facing rising competition. The new CEO will have to convince investors that Intel's loss of manufacturing leadership -- a cornerstone of its dominance -- won't cost it market share in the lucrative semiconductor market. He or she will also have to deliver on the company's promise to maintain growth by winning orders beyond personal computer and server chips. "The new CEO will have many difficult decisions to make in a short amount of time," said Kevin Cassidy, an analyst at Stifel Nicolaus & Co. "The company can perform well in the near term due to good demand for PC and servers, but longer-term decisions and strategy need a CEO soon."

Why have wages been so slow to rise at a time when demand for workers has pushed the U.S. unemployment rate to its lowest point in nearly half a century? One answer: contracts that tie millions of unspecialized workers to their jobs. Bloomberg reports: In far too many cases, these so-called noncompetes are an unwarranted restriction on freedom to transact and a drag on growth. If Congress won't act to narrow their scope, states should take the lead. The desire to keep workers from defecting to rival employers is as old as employment itself. As far back as the 15th century, English masters, such as dyers or blacksmiths, made apprentices promise not to set up shop nearby. Courts often refused to uphold such agreements, viewing them as coercive. As a House of Lords decision put it in 1893, "There is obviously more freedom of contract between buyer and seller than between master and servant or between an employer and a person seeking employment."

More than a century later, the idea is back in vogue, as companies exploit the power that comes with increasing size and market concentration. In the U.S., new employees are commonly required to sign contracts that forbid them to work in the same industry for a given period. The practice makes sense for highly paid jobs involving big investments in training, and for staff with valuable proprietary knowledge. But it isn't being limited to those kinds of employees. A 2014 survey found that about two in five workers were or had at some point been bound in this way, including workers such as security guards and camp counselors. Some 12 percent of employees without a bachelor's degree and earning less than $40,000 a year were tied down.