By using lightweight "membrane optics" instead of traditional glass, a new generation of space telescopes could be deployed that reach sizes of 20 metres (68 foot) or larger.
As the need for higher-resolution orbital imagery expands, glass mirrors are fast approaching the point where they will be too large, heavy and costly for even the largest of today's rockets to carry to orbit. DARPA's Membrane Optical Imager for Real-Time Exploitation (MOIRE) program seeks to address these challenges by developing technologies that would make orbital telescopes much lighter, more transportable and more cost-effective. Currently in its second and final phase, the program recently successfully demonstrated a ground-based prototype that incorporated several critical technologies, including new lightweight polymer membrane optics to replace glass mirrors.
Instead of reflecting light with mirrors or refracting it with lenses, MOIRE's membrane optics diffract light. Roughly the thickness of household plastic wrap, each membrane serves as a Fresnel lens — it is etched with circular concentric grooves like microscopically thin tree rings, decreasing from hundreds of microns at the centre, down to only 4 microns at the outside edge. The diffractive pattern focuses light on a sensor that the satellite translates into an image.
MOIRE technology houses the membranes in thin metal "petals" that would launch in a tightly-packed configuration roughly 20 feet in diameter. Upon reaching its destination orbit, a satellite would then unfold the petals to create the full-size, multi-lens optics. The envisioned diameter of 68 feet (about 20 metres) would be the largest telescope optics ever made — dwarfing the glass mirrors contained in the world's most famous telescopes. This behemoth would be even larger than the 16-metre ATLAST observatory planned for 2025.
Looking down from geostationary orbit, it is believed a satellite using MOIRE optics could see approximately 40 percent of the Earth’s surface at once. It could focus on a 10 km-by-10 km region at 1-metre resolution and provide real-time video of this entire area at one frame per second. In its ground-based tests, MOIRE has achieved a technological first for membrane optics by nearly doubling their efficiency, from 30 percent to 55 percent.
Lt. Col. Larry Gunn, DARPA program manager: "Membrane optics could enable us to fit much larger, higher-resolution telescopes in smaller and lighter packages. In that respect, we're 'breaking the glass ceiling' that traditional materials impose on optics design. We're hoping our research could also help greatly reduce overall costs and enable more timely deployment using smaller, less expensive launch vehicles."
Luxury bespoke tailoring house, Garrison Bespoke, has launched the first fashion-forward bulletproof suit with a live ammo field-testing event in Toronto, Canada.
Michael Nguyen, co-owner of Garrison Bespoke: "After receiving requests from high-profile clients who travel to dangerous places for work, we set out to develop a lightweight, fashion-forward bulletproof suit as a more discreet and stylish alternative to wearing a bulky vest underneath."
The Garrison Bespoke bulletproof suit is made with carbon nanotubes created using nanotechnology and originally developed to protect the US 19th Special Forces in Iraq. The patented material is thinner, more flexible and 50 percent lighter than Kevlar, which is traditionally used for bulletproof gear. The suit also protects against stabbing – the carbon nanotubes harden on impact to prevent a knife from penetrating.
The live ammo field-testing event was held in the Ajax Rod and Gun Club, Ontario. It demonstrated the suit's ability to shield against 9mm bullets. Nguyen claims the suit can block .45 bullets as well. Garrison Bespoke's latest collection – Town & Country – features a range of new clothing, all of which can be made bulletproof by request, with prices starting from $20,000.
The Defense Advanced Research Projects Agency (DARPA) is seeking to develop new technology to enable near real-time measurement and analysis of brain systems, for use in precise neural stimulation therapies.
Despite our best efforts to protect the health of U.S. service members and veterans, the effects of neuropsychological illness brought on by war, traumatic injuries and other experiences are not always easily treated. While current approaches can often help to alleviate the worst effects of these illnesses, they are imprecise and not universally effective. Demand for new therapies is high, as mental disorders are the leading cause of hospital bed days and the second leading cause of medical encounters for active duty service members. Among veterans, ten percent of those receiving treatment from the Veterans’ Health Administration are provided mental health care or substance abuse counselling.
DARPA has created the Systems-Based Neurotechnology for Emerging Therapies (SUBNETS) program to pursue advances in neuroscience and neurotechnology that could lead to new clinical understanding of how neuropsychological illnesses manifest in the brain – and to advanced therapies to reduce the burden and severity of illnesses in troops and veterans. This program will attempt to establish the characteristics of distributed neural systems, and develop therapies based on near real-time recording, analysis and stimulation using next-generation devices inspired by Deep Brain Stimulation (DBS).
DBS already exists as a therapy option for certain neurologic and neuropsychological illnesses in patients who are not responsive to other therapies. Approximately 100,000 people around the globe live with a DBS implant – a device that delivers electrical stimulation to reduce the motor impairment caused by Parkinson's disease and dystonia. These devices are also being studied as therapy for depression, obsessive compulsive disorder, Tourette’s and epilepsy.
Despite recent advances, clinicians and researchers remain limited by the tools available to study, understand and treat systems of the brain. To achieve maximum benefit, they are often forced to complete a slow, repetitive and imprecise cycle of observing behaviours and then fine-tuning drug or behavioural therapy until the effects of a disease are reduced. The science has, until now, been largely based on a century of identifying associations between complex behaviours and diffuse understanding of the brain.
SUBNETS will seek to move beyond this limited understanding, to create interventions based on new insights that can be gained from the intersection of neuroscience, neurotechnology and clinical therapy. While there is no question that brain activity, anatomy and behaviour are functionally linked, there is a growing body of evidence to suggest that many neural and behavioural processes are not localised to specific anatomical regions – but are emergent from systems that span several regions of the brain. SUBNETS will establish the capability to record and model how these systems function.
DARPA is specifically interested in the underlying systems which contribute to the following conditions: Post-Traumatic Stress Disorder, Major Depression, Borderline Personality Disorder and General Anxiety Disorder. DARPA also seeks to evaluate the representation in the central nervous system of: Traumatic Brain Injury, Substance Abuse/Addiction and Fibromyalgia/Chronic Pain.
“If SUBNETS is successful, it will advance neuropsychiatry beyond the realm of dialogue-driven observations and resultant trial and error, and into the realm of therapy driven by quantifiable characteristics of neural state,” said Justin Sanchez, DARPA program manager. “SUBNETS is a push toward innovative, informed and precise neurotechnological therapy to produce major improvements in quality of life for service members and veterans who have very few options with existing therapies. These are patients for whom current medical understanding of diseases like chronic pain or fatigue, unmanageable depression or severe post-traumatic stress disorder can't provide meaningful relief.”
As described in a broad agency announcement, the work will require development of novel medical hardware, complex modelling of human neural systems, clinical neurology and animal research. DARPA expects that successful teams will span across disciplines including psychiatry, neurosurgery, neural engineering, microelectronics, neuroscience, statistics and computational modelling.
“We're talking about a whole systems approach to the brain, not a disease-by-disease examination of a single process or a subset of processes,” Sanchez said. “SUBNETS is going to be a cross-disciplinary, expansive team effort and the program will integrate and build upon historical DARPA research investments.”
Because programs like SUBNETS push the leading edge of science, they are often society’s first encounter with the dilemmas associated with new technologies. DARPA understands the importance of considering ethical, legal, societal and policy questions. For that reason, the Agency has convened an Ethical, Legal and Social Implications (ELSI) panel to inform and advise on emerging neuroscience efforts.
The SUBNETS project is part of the $100 million BRAIN Initiative announced by President Obama in April. DARPA hopes to have the brain implants developed within five years.
The ability to shrink laboratory-scale processes to automated chip-sized systems would revolutionise biotechnology and medicine. For example, inexpensive and highly portable devices that process blood samples to detect biological agents, such as anthrax, are needed by the U.S. military and for homeland security efforts.
A microfluidic bioreactor. Credit: Adam Fenster/University of Rochester.
One of the challenges of "lab-on-a-chip" technology is the need for miniaturised pumps to move solutions through micro-channels. Electroosmotic pumps (EOPs) — devices in which fluids appear to magically move through porous media in the presence of an electric field — are ideal, because they can be readily miniaturised. EOPs however, require bulky and external power sources, which defeats the concept of portability. But a super-thin silicon membrane developed at the University of Rochester could now make it possible to drastically shrink the power source, paving the way for new diagnostic devices the size of a credit card.
"Up until now, electroosmotic pumps have had to operate at a very high voltage, about 10 kilovolts," said James McGrath, associate professor of biomedical engineering. "Our device works in the range of one-quarter of a volt, which means it can be integrated into devices and powered with small batteries."
McGrath's research paper is published this week by the journal Proceedings of the National Academy of Sciences.
McGrath and his colleagues use porous nanocrystalline silicon (pnc-Si) membranes that are microscopically thin – it takes more than one thousand stacked on top of each other to equal the width of a human hair. And that's what allows for a low-voltage system.
A porous membrane needs to be placed between two electrodes in order to create what's known as electroosmotic flow, which occurs when an electric field interacts with ions on a charged surface, causing fluids to move through channels. Membranes previously used in EOPs have resulted in a significant voltage drop between the electrodes, forcing engineers to begin with bulky and high-voltage power sources. The thin pnc Si membranes allow the electrodes to be placed much closer to each other, creating a much stronger electric field with a much smaller drop in voltage. As a result, a smaller power source is needed.
"Until now, not everything associated with miniature pumps was miniaturised," said McGrath. "Our device opens the door for a tremendous number of applications."
Along with medical applications, it's been suggested that EOPs could be used to cool electronic devices. As electronic devices get smaller, components are packed more tightly, making it easier for the devices to overheat. With miniature power supplies, it may be possible to use EOPs to help cool laptops and other portable electronic devices.
McGrath said there's one other benefit to the silicon membranes. "Due to scalable fabrication methods, the nanocrystalline silicon membranes are inexpensive to make and can be easily integrated on silicon or silica-based microfluid chips."
Engineering and robotics firm Boston Dynamics has released three new videos showing the latest progress on its hi-tech machines.
First up is the ATLAS, an early prototype of which was seen in October 2012. Since then, this humanoid robot has undergone a number of tests and design revisions. It is now able to walk over rock-strewn terrain with ease, as well as remaining balanced when hit by an object from the side.
Next is the Legged Squad Support System (LS3). Due to enter service in 2014, this robotic pack mule will assist soldiers with carrying heavy equipment through rugged terrain. It is designed to automatically follow a squad, using advanced computer vision, so does not require a dedicated driver. Each LS3 will carry up to 400 lbs of gear and enough fuel for a 20-mile mission lasting 24 hours. This video shows field testing at Twentynine Palms, California.
Finally, here is the WildCat. This machine is a more advanced version of the Cheetah robot seen last year. Although not quite as fast (yet), it can operate without being tethered to a power supply. Here it is shown running outdoors at a maximum speed of 16 mph (compared with the Cheetah's 28 mph).
Peter Joseph, creator of the Zeitgeist movies, has released the final episode of his Culture in Decline series. From the video description:
"In this final episode of the season, Dr. Peter Joseph shows off his fresh new Time Machine, guiding the audience through a vision of two possible futures. The first exploring the current trends that just may lead us all into vast new levels of decline; the second showing what the world could be... if anyone actually gave a damn to make it happen."
The Persistent Close Air Support (PCAS) program aims to improve air-to-ground fire coordination, but could revolutionise military tech development and deployment as well.
Air-ground fire coordination – also known as Close Air Support or CAS – is a dangerous and difficult business. Pilots and dismounted ground agents must ensure they hit only the intended target using just voice directions and, if they’re lucky, a common paper map. It can often take up to an hour to confer, get in position and strike – time in which targets can attack first or move out of reach. To help address these challenges, DARPA recently awarded a contract for Phase II of its Persistent Close Air Support (PCAS) program to the Raytheon Company of Waltham, Mass.
PCAS aims to enable ground forces and combat aircrews to jointly select and employ precision-guided weapons from a diverse set of airborne platforms. The program seeks to leverage advances in computing and communications technologies to fundamentally increase CAS effectiveness, as well as improve the speed and survivability of ground forces engaged with enemy forces.
“Our goal is to make Close Air Support more precise, prompt and easy to coordinate under stressful operational conditions,” said Dan Patt, DARPA program manager. “We could use smaller munitions to hit smaller or moving targets, minimising the risk of friendly fire or collateral damage.”
While its tools have become more sophisticated, CAS has not fundamentally changed since World War I. To accelerate CAS capabilities well beyond the current technological state of the art, PCAS envisions an all-digital system that incorporates commercial IT products and models such as open interfaces, element modularity and mobile software applications.
PCAS designs currently include two main components, PCAS-Air and PCAS-Ground. PCAS-Air would consist of an internal guidance system, weapons and engagement management systems, and high-speed data transfer via Ethernet, existing aircraft wiring or wireless networks. Based on tactical information, PCAS-Air’s automated algorithms would recommend optimal travel routes to the target, which weapon to use on arrival and how best to deploy it. Aircrews could receive information either through hardwired interfaces or wirelessly via tablet computers.
PCAS-Air would inform ground forces through PCAS-Ground, a suite of technologies enabling improved mobility, situational awareness and communications for fire coordination. A HUD eyepiece wired to a tablet computer like that used in PCAS-Air would display tactical imagery, maps and other information, enabling ground forces to keep their eyes more on the target and less on a computer screen.
Parts of PCAS-Ground are already in field trials that mark some of the first large-scale use of commercial tablets for air-ground fire coordination. From December 2012 through March 2013, PCAS deployed 500 Android tablets equipped with PCAS-Ground situational awareness software to units stationed in Afghanistan. The tablets provided warfighters with added capabilities including digital gridded reference graphics (GRGs), digital terrain elevation data and other mission planning and execution tools. In the air, in-flight GPS tracking enabled pilots and ground forces to locate their relative positions in real time. Field reports show that PCAS-Ground has replaced those units’ legacy paper maps, dramatically improving ground forces’ ability to quickly and safely coordinate air engagements.
One of the most potentially groundbreaking elements of PCAS is its Smart Rail, a modular system that would attach to standard external mounting rails on many common fixed- and rotor-wing aircraft. The Smart Rail would initially carry and perform engagement computations for the PCAS-Air components, but it would also enable quick, inexpensive installation of new piloting aids and new radios to communicate to ground agents. The plug-and-play system could accommodate legacy and future equipment with equal ease, and eventually could also be compatible with unmanned air vehicles (UAVs).
“The Smart Rail is an easy way to get digital air-ground coordination onto current and future aircraft,” Patt said. “Just as the USB revolutionised how we use IT-enabled devices, modular technologies like the Smart Rail could greatly reduce development time and costs for military technology and speed deployment of PCAS and other capabilities.”
The FBI confirmed this week that drones are carrying out surveillance within the USA, without regulations in place to address privacy concerns. Speaking to Democracy Now!, Heidi Boghosian – National Lawyers Guild executive director and author of the forthcoming book, "Spying on Democracy: Government Surveillance, Corporate Power and Public Resistance" – explains the technologies being developed to expand drone surveillance in the near future. These include drones the size of mosquitoes, capable of entering apartment buildings and remaining airborne inside to spy without detection. You can watch the full interview here.
The results of a new survey by the University of Massachusetts Amherst show that a majority of Americans across the political spectrum oppose the outsourcing of lethal military and defence targeting decisions to machines. The opposition to autonomous weaponry is bipartisan, with the strongest opposition on the far left and far right, and among active and former members of the military.
A random sample of 1,000 Americans was asked how they felt about military technology that could take humans out of the loop altogether, dubbed "killer robots" by the Campaign to Stop Killer Robots, an international coalition of non-governmental organisations launched in April that is working to ban fully autonomous weapons.
Overall, 55 percent of the survey's respondents said that they oppose the development of autonomous weapons, while 39 percent were "strongly opposed." Of the remainder, nearly 20 percent were "not sure," but the study found that people without a strong opinion tended to favour a precautionary approach to the emerging technology. The findings were consistent across all ages, regions, education and income levels, as well as both genders, but those with higher levels of education and those most likely to follow the news were more opposed.
The survey was overseen by Charli Carpenter, associate professor of political science at UMass Amherst and a specialist in human security and global advocacy movements. Carpenter, who has studied the ethical debate around autonomous weapons since 2007, determined that the survey's findings support the claims of advocates for a pre-emptive ban.
"While much of the recent public debate has focused on remote-controlled military drones, there has been less research on what people think about fully-autonomous weapons," Carpenter said. "This question matters in terms of the international law on new weapons, because an important treaty clause states that 'the public conscience' should serve to guide policy decisions in the absence of clear rules. These findings would suggest that people across the board do tend to feel very concerned about the development of these forms of weapons."
Carpenter also collected open-ended answers on why people liked or disliked the idea of autonomous weapon systems. While she is continuing to analyse the data, the preliminary results show concerns over potential malfunctions, the absence of a moral conscience in machines, whether they could distinguish civilians and combatants, the loss of human control over machines with the power to kill, and the possibility that they could be used by dictators to more efficiently violate human rights.
The minority of respondents arguing in favour of the weapons generally mentioned their desire to "protect the troops." However, active duty military personnel themselves indicated the highest proportion of strong disapproval for autonomous weapon systems among all subsets polled, at 65 percent. Overall, active duty military personnel had a 73 percent disapproval rate of such weapons. Military veterans and those with family in the military also had strong feelings against the weapons, with veterans registering a 50 percent "strongly opposed" response rate and 63 percent general opposition, while military family members showed a similar 62 percent rate of general opposition.
Citing critics who have accused organisations like Human Rights Watch of using the term "killer robots" as a scare tactic to heighten public concern over autonomous systems, Carpenter varied the survey's questions to randomise its wording between "killer robots" and "fully autonomous weapons." She said that the results showed public opposition to autonomous weapon systems is constant regardless of the terms used.
"We found no significant difference in public sentiment depending on whether we used language like 'stopping killer robots' versus 'banning fully autonomous weapons,'" Carpenter said. "People are scared by the idea of removing humans from the loop, not simply scared of the label."
This online survey of 1,000 Americans aged 18 or older was conducted by YouGov America under the direction of the University of Massachusetts Amherst. The margin of error for the poll is 3.6 percent.