As GameSpot reports, Valve has implemented a policy that reduces the privileges of Steam users unless those users have spent $5 through the service. Along the same lines as suggestions to limit spam by imposing a small fee on emails, the move is intended to reduce resource abuse as a business model. From the article: “Malicious users often operate in the community on accounts which have not spent any money, reducing the individual risk of performing the actions they do, ” Valve said. “One of the best pieces of information we can compare between regular users and malicious users are their spending habits as typically the accounts being used have no investment in their longevity. Due to this being a common scenario we have decided to restrict certain community features until an account has met or exceeded $5.00 USD in Steam.” Restricted actions include sending invites, opening group chats, and taking part in the Steam marketplace. Read more of this story at Slashdot.
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Whoah, Small Spender! Steam Sets Limits For Users Who Spend Less Than $5
In 1815 William Smith drew a map of the United Kingdom which transformed the scientific landscape: It laid the foundations for modern geology, and identified natural resources which would beget the Industrial Revolution. But up until last year, this first-edition copy was considered to be lost forever. Read more… 
Lasrick writes: Seth Baum reports on international efforts to ban ‘killer robots’ before they are used. China, Israel, Russia, the United Kingdom, and the United States are apparently developing precursor technology. “Fully autonomous weapons are not unambiguously bad. They can reduce burdens on soldiers. Already, military robots are saving many service members’ lives, for example by neutralizing improvised explosive devices in Afghanistan and Iraq. The more capabilities military robots have, the more they can keep soldiers from harm. They may also be able to complete missions that soldiers and non-autonomous weapons cannot.” But Baum, who founded the Global Catastrophic Risk Institute, goes on to outline the potential downsides, and there are quite a few. Read more of this story at Slashdot. 
The L.A. Times reports that for the first time since 2007, the FDA has approved a weight loss device (as opposed to a weight-loss drug), an implantable device called the Maestro Rechargeable System. Using electrical leads implanted just above the stomach and a regulator carried under the skin near the ribcage, the device suppresses signals carried by the vagus nerve. … The device adopts a variant of a “neuromodulation” technique long used in the treatment of epilepsy: by applying intermittent bursts of electrical current to the vagus nerve, it disrupts the signals that prompt the stomach to relax, expand and prepare for an influx of food. … The FDA approved the use of the device in adult patients with a body mass index, or BMI, between 35 and 45, who have at least one other obesity-related condition, such as type 2 diabetes. Read more of this story at Slashdot. 
One of the six simple machines, a screw is nothing more than an inclined plane wrapped around a center pole. While today screws come in standard sizes, and typically are tightened by turning clockwise (and loosened by turning counterclockwise), this is a recent invention. A great example of how things that seem simple can be really hard to do right, the development of the predicable system we enjoy today took 2, 000 years to invent. Read more… 
There’s no denying that graphene is a wonderful material —strong, flexible, and highly conductive—but it’s taking a long time to become a commercial reality. Now, scientists working with a material called cadmium arsenide believe it offers many of the same benefits—but could actually be far easier to use in the real world. Read more… 
necro81 writes: “The FDA today approved the Luke prosthetic arm for sale. The Luke Arm, created by Dean Kamen’s DEKA R&D Corp., was a project initiated by DARPA to develop a prosthetic arm for wounded warriors more advanced than those previously available. The Arm can be configured for below-the-elbow, above-the-elbow, and shoulder-level amputees. The full arm has 10 powered degrees of freedom and has the look and weight of the arm it replaces. Through trials by DEKA and the Dept. of Veterans Affairs, the Arm has been used by dozens of amputees for a total of many thousands of hours. Commercialization is still pending.” Read more of this story at Slashdot.