• A very big concept lifts off

    In 2010, a group of defense contractors led by Northrop Grumman received a contract from the U.S. Department of Defense to create a so-called Long Endurance Multi-Intelligence Vehicle (LEMV) — a super-sized surveillance aircraft that had the capability of spending days in the air on a single mission. The first test flight of the Airlander took place in August 2012. In 2013, however, budget cuts led to the cancellation of the project, and U.K.-based Hybrid Air Vehicles (HAV), which was part of contractors group, bought the Airlander back from the DoD at effectively scrap value. So the Airlander came back to the United Kingdom, where it lives in a giant hangar in Cardington, Bedfordshire. It is there because it is the only place in the United Kingdom that can house it, having been built for airship manufacture in 1915. HAH has big plans for it.

  • Louisiana Tech’s concrete canoe, steel bridge teams win big at ASCE competition

    The Louisiana Tech University’s American Society of Civil Engineers (ASCE) Concrete Canoe and Steel Bridge teams swept the 2015 Deep South Conference competition in Oxford, Mississippi recently, bringing nine awards back to Louisiana Tech and earning spots in the national competitions. The Deep South Conference competition, which includes teams from universities in Arkansas, Louisiana, Mississippi, and Tennessee, is held annually to enhance student knowledge of techniques, professionalism, and ethics as they relate to civil engineering, and to allow students to apply the principles and concepts they have learned in their undergraduate studies.

  • California imposes first mandatory water restrictions in state history

    Standing on a patch of brown grass in the Sierra Nevada mountains, which is usually covered with several feet of snow at this time of the year, California governor Jerry Brown announced the first mandatory water restrictions in state history. “Today we are standing on dry grass where there should be five feet of snow,” Brown said yesterday. “It’s a different world… we have to act differently.”About 30 percent of California’s water supply comes from the Sierra Nevada snowpack, so less snow means less snowmelt, which means less water.

  • Extended Oregon drought raises concern over state’s water security

    Facing the fourth straight year of drought, Oregon officials are worried that the state’s water security may be in jeopardy, as is already the case in California, which has just announced its first-ever mandatory water restrictions. a historically warm winter this season has continued to shrink snowpack throughout the Oregon Cascades, including the usual five-foot levels which accumulate on Mt. Hood, leading experts to suggest that even bigger problems lie ahead. Without the usual snowfall, Oregonians can expect fewer healthy fish in the rivers, fewer seed sprouts, and more wild fires. Moreover, the need for more irrigation could hamper the state’s already hobbled farming economy.

  • NSA’s recruitment effort challenged by Snowden leaks, private sector competition

    The NSA employs roughly 35,000 people nationwide and anticipates on recruiting at least 1,000 workers each year. For 2015, the agency needs to find 1,600 recruits, hundreds of whom must come from highly specialized fields like computer science and mathematics. The agency has been successful so far, but still faces recruitment challenges in the aftermath of the Edward Snowden revelations and competition from private sector firms who offer recruits much higher salaries.

  • Water scarcity a contributing cause of wars, terrorism in Middle East, North Africa

    The UN defines a region as water stressed if the amount of renewable fresh water available per person per year is below 1,700 cubic meters. A region is experiencing water scarcity if the figure is below 1,000 cubic meters, and below 500 amounts to “absolute water scarcity.” Water scarcity driven by overuse, poor land management, and climate change, is one of the causes of wars and terrorism in the Middle East and North Africa. If governments fail to respond, shortages of major resources, including food and energy, will cause greater insecurity and conflict.

  • Future supply risks threaten metals used in high-tech products

    During the past decade, sporadic shortages of metals needed to create a wide range of high-tech products have inspired attempts to quantify the criticality of these materials, defined by the relative importance of the elements’ uses and their global availability. In a new paper, a team of researchers assesses the “criticality” of all sixty-two metals on the Periodic Table of Elements, providing key insights into which materials might become more difficult to find in the coming decades, which ones will exact the highest environmental costs — and which ones simply cannot be replaced as components of vital technologies.

  • For soybean growers, hidden cost of climate change exceeds $11 billion

    Even during a good year, soybean farmers nationwide are, in essence, taking a loss. This is because changes in weather patterns have been eating into their profits and taking quite a bite: $11 billion over the past twenty years. This massive loss has been hidden, in effect, by the impressive annual growth seen in soybean yields thanks to other factors. That growth, however, could have been 30 percent higher if weather variations resulting from climate change had not occurred, according to a new study.

  • Fighting fires with low-frequency sound waves

    A thumping bass may do more than light up a party — it could flat out extinguish it, thanks to a new sound-blasting fire extinguisher by George Mason University undergrads. The fire extinguisher uses low-frequency sound waves to douse a blaze. Their sound-wave device is free of toxic chemicals and eliminates collateral damage from sprinkler systems. If mounted on drones, it could improve safety for firefighters confronting large forest fires or urban blazes.

  • Tethered robots to be the “eyes” of firefighters in “blind” conditions

    Researchers have developed revolutionary reins which enable robots to act like guide dogs, which could enable that firefighters moving through smoke-filled buildings could save vital seconds and find it easier to identify objects and obstacles. The small mobile robot — equipped with tactile sensors — would lead the way, with the firefighter following a meter or so behind holding a rein. The robot would help the firefighter move swiftly in “blind” conditions, while vibrations sent back through the rein would provide data about the size, shape and even the stiffness of any object the robot finds.

  • U.K. coastal railways at increasing risk from climate change

    Footage of a railway line suspended in mid-air and buffeted remorselessly by the storm that had caused the sea wall to collapse beneath it made for one of the defining images of 2014. Scenes such as those witnessed at Dawlish in Devon are set to become more frequent as a result of climate change, and the U.K. government and rail companies must face up to difficult funding decisions if rural areas currently served by coastal lines are to continue to be connected to the rail network. For railway builders in the mid-nineteenth century the coast was cheaper, flatter, and easier than using inland sites, one expert points out. “We wouldn’t have built these railway lines where they are if we had today’s knowledge.”

  • World population may outpace water supply by mid-century

    Population growth could cause global demand for water to outpace supply by mid-century if current levels of consumption continue. It would not, however, be the first time this has happened, a new study finds. Using a delayed-feedback mathematical model which analyzes historic data to help project future trends, the researchers identified a regularly recurring pattern of global water use in recent centuries. Periods of increased demand for water — often coinciding with population growth or other major demographic and social changes — were followed by periods of rapid innovation of new water technologies that helped end or ease any shortages. The researchers’ conclusions: Technological advances will be needed in coming decades to avoid water shortages.

  • Damage-sensing, self-repairing concrete

    Skin is renewable and self-repairing — our first line of defense against the wear and tear of everyday life. If damaged, a myriad of repair processes spring into action to protect and heal the body. Clotting factors seal the break, a scab forms to protect the wound from infection, and healing agents begin to generate new tissue. Taking inspiration from this remarkable living healthcare package, researchers are asking whether damage sensing and repair can be engineered into a quite different material: concrete. Their aim is to produce a “material for life,” one with an in-built first-aid system that responds to all manner of physical and chemical damage by self-repairing, over and over again.

  • Rising sea level will double Hawaii’s coastal erosion by mid-century

    New research brings into clearer focus just how dramatically Hawaiʻi beaches might change as sea level rises in the future. Chronic erosion dominates the sandy beaches of Hawaiʻi, causing beach loss as it damages homes, infrastructure, and critical habitat. Researchers have long understood that global sea level rise will affect the rate of coastal erosion. The research team developed a simple model to assess future erosion hazards under higher sea levels, taking into account historical changes of Hawaiʻi shorelines and the projected acceleration of sea level rise reported from the IPCC. The results indicate that coastal erosion of Hawaiʻi’s beaches may double by mid-century.

  • Policy makers discount damages from future climate tipping points – but they should not

    Most methods that weigh up the costs and benefits of tackling climate change ignore climate tipping points, and especially the uncertainty surrounding them. Instead, they assume that future damages from climate change are known perfectly and can therefore be discounted at a rate comparable to the market interest rate – thus reducing the willingness to pay now to protect future generations. New research shows, however, that the prospect of an uncertain future tipping point should greatly increase the amount we are willing to pay now to limit climate change. The study argues that society should set a high carbon tax now to try and prevent climate change reaching a point of no return.