Octopus-inspired surgical tool will dig deep into your guts

Telecommuting surgeons are becomingly increasingly adept at working on humans but there are still limits on what they can do using the stiff metal manipulators of a robotic stand-in like the DaVinci. This new omnidirectional grasping appendage, however, could one day wind its way into the most remote corners of your body cavity and gently cradle your guts with the same dexterity as an octopus’ tentacle.

Developed by a team at the Sant’Anna School of Advanced Studies in Italy, the device is comprised of a pair of identical, interconnected modules wrapped in a flexible sleeve and separated by three inflatable bladders. Pumping air into the the bladders causes the device to stretch and flex while applying a vacuum to the membrane surrounding each module makes the appendage stiffen. According the the team’s study (recently published in the journal Bioinspiration and Biomimetics) the device can flex up to 255 degrees, stretch by as much as 62 percent and stiffen itself from 60 to 200 percent of its original state.

“The human body represents a highly challenging and non-structured environment, where the capabilities of the octopus can provide several advantages with respect to traditional surgical tools,” lead author Dr Tommaso Ranzani wrote. “‘Generally, the octopus has no rigid structures and can thus adapt the shape of its body to its environment. Taking advantage of the lack of rigid skeletal support, the eight highly flexible and long arms can twist, change their length, or bend in any direction at any point along the arm.” The technology is still a couple years away from entering clinical trials so your robotic tentacle porn jokes will have to wait until then.

Filed under: Science

Comments

Via: Phys.org

Source: IOP

Prosthetic electrodes will return amputees’ sense of touch

For all the functionality and freedom that modern prosthetics provide, they still cannot give their users a sense of what they’re touching. That may soon change thanks to an innovative electrode capable of connecting a prosthetic arm’s robotic sense of touch to the human nervous system that it’s attached to. The device is part of a three year, $1.9 billion DARPA project and is being developed by Daniel Moran and his team at Washington University in St. Louis. The electrode, technically called a macro-sieve peripheral nerve interface, is comprised of a thin contact lens-like material less than 20 percent the diameter of a dime. It reportedly allows its users to feel heat, cold and pressure by stimulating the ulnar and median nerves of the upper arm.

However, Moran’s team must first determine how much sensory information is actually encoded in natural systems before they can begin incorporating them into people. They’ll do so by implanting prototypes into the forearms of “nonhuman primates” and monitoring the stimulation of peripheral nerves using a technique known as current steering. “We want to see what they can perceive,” Moran said in a statement. “If we stimulate this sector of the nerve, that tells them to reach to one side in a standard reaching task. We want to figure out how small we can make the stimulation so they can still sense it.” With that data in hand, the team expect they’ll be able to develop more accurate sensor suites in future prosthetics, like the Luke Hand that DARPA is already building.

Filed under: Science

Comments

Via: Phys.org

Customize your mobile web experience using Chrome flags – Android customization

Have you been having fun tracking all of your movements through your Google Location history, as we walked through in last week’s Android customization post? We hope so. Now it is time to take to our web browser to make some subtle and significant tweaks, this week we will take an in-depth look at Chrome Flags.

We know that not all of you use Google’s Chrome web browser as your browser of choice for your Android device. However, Chrome is the default browser on many devices out there, so we thought we would take a minute to make sure you are getting the most out of it.

Before we get started

To follow along today, you will need a copy of the Chrome web browser installed on your device.We will stick with the basic Chrome browser, but you will find that most all the options are the same through the Chrome Beta and Chrome Dev releases as well. All three versions of the Chrome browser are free in the Google Play store.

What are Chrome Flags?

Starting at the beginning, I will explain Chrome Flags as a set of very advanced and experimental settings for your Chrome browser. Hidden away in this extensive list of options will be the ability to turn on and off hardware graphics acceleration, touchscreen support and more, all the way down to fine tune control on form auto-fill tools and even disabling the new Bookmark Manager on your PC, if you don’t care for it.

Warning: I will shorten what Google has at the top of the flags page – do not rely on these flags, they are experimental and can crash your browser. Luckily, on Android, if we screw up really bad and crash Chrome by messing with these flags, we simply Clear Data on the app and we are good to go again. Do be a little bit more careful if you are messing around with Chrome on your PC, there is a reset button, but it is not as bulletproof as on Android.

Now it is time to get you into these fun settings, please go ahead and open Chrome, head to the Omnibox (address bar), type in the following and hit enter:

Chrome://flags

If you haven’t noticed this already, Chrome has a few of these Easter eggs tucked into the browser. On your Android device, try out Chrome://version for a super detailed overview of your browser version. On your Android device or PC, try hitting chrome://chrome-urls to see the entire list of available browser pages.

What flags should I change?

Once you are in the full list of available Chrome flags, you may be a little overwhelmed at which you should turn on, or off. Truth is, if you do not have a specific problem to solve, or are not exactly adventurous with your device, you probably shouldn’t be here. That being said, here is a quick list of some of the more popular flags to change.

Quick Note: Each Flag has been assigned an HTML anchor to make it easier to navigate to, as such, all you need to do is add the reference to each in the address, so it looks like chrome://flags/#Flag-Name. I’ve added the anchor as a link for each Flag below, but they are not typically formed URLs, so you can’t just click on them, instead, right click and choose Copy link address, then paste that in a new tab, just remember they only work in Chrome.

• FPS Counter – For the gamer in all of us, although a web page doesn’t exactly depend on a FPS count like a game might, it is still fun to see sometimes. #show-fps-counter
• Show Autofill predictions – Disabled by default, this flag will insert predicted text into text boxes for you. Not just for password anymore. #show-autofill-type-predictions
• Enable password generation – Sometimes choosing your own password is just too hard, let Chrome choose one for you. #enable-password-generation
• Maximum tiles for interest area – We talked about this in the past, basically, this is a way to control your RAM usage for Chrome. Check out the story to find out what you need to do. #max-tiles-for-interest-area
• Enable offline auto-reload mode – Turn this off to prevent tabs from automatically reloading if the previously failed to load. Perhaps you were offline at the time. Requires you to manually reload the pages. #enable-offline-auto-reload
• Disable click delay – Did you know that Chrome waits almost half a second sometimes before acting on your button clicks? That’s right, it delays so that you can trigger a double click action. If you never double click in your browser, go ahead and turn this guy on to speed up the click action. #disable-click-delay
• Disable the pull-to-refresh effect – Most people were excited to see pull-to-refresh in Chrome, if you were not, simply hit this to turn it off again. #disable-pull-to-refresh-effect
• Enable Enhanced Bookmarks – Rather, disable this one to turn off Google’s new bookmark manager. I mean, you might like the new tool, but those of us that dislike it, dislike it with a passion. #enhanced-bookmarks-experiment
• Password and account settings. Truth is, there are a few flags that deal with passwords, credential managers and related that might be fun to play with, however, as there is no guarantee that these flags will not expose all of your passwords to the internet, I will not recommend any of them. Please take precautions.

There are many more flags that may appeal to you, and you may decide to enable/disable them in different configurations on your Android device as compared to the setup on your PC. I totally encourage you to play with them to fine tune your user experience.

What’s next

You will have noticed that each flag in Chrome displays the available platforms for which it will operate. Most flags work almost everywhere, Mac, Windows, Linux, Chrome OS and Android, others may only work on one platform.

There are many flags that are designed to assist developers, such as the flag that makes it so a popup banner shows each and every time a page loads. Annoying for the rest of us, but required for testing.

Finally, many of the chrome://flags will require a browser restart before they will take effect. When this is true, a simple restart button pops up at the bottom of the screen. Choose all of your flags, hit the reset button and off you go with your new settings.

Next week

I wish we had more time to talk about more flags in Chrome for our Android customization post this week, we hope we pointed you toward a few good ones at least. Next week, let’s look at a really easy one, for the beginners in the crowd, let’s find out how to disable auto-correct on your Android device.

What are your favorite Chrome flags to enable or disable?