Tag Archives: Earth

Updates from ITU

World Space Week – ITU’s contribution to a world united by space
By Alexandre Vallet – This year’s theme of World Space Week, “Space Unites the World,” resounds with the never-ending work carried out by the entire ITU membership since the 1960s to ensure that adequate radio frequencies are available for space activities.

Only six years after the historical first satellite launch of Sputnik in 1957, ITU organized the Extraordinary Administrative Radio Conference to allocate frequency bands for space radiocommunication purposes in Geneva from 7 October to 8 November 1963.

The Conference, which was attended by more than 400 delegates from 70 ITU Member States, allocated for the first time radio frequencies for outer space activities, totaling about 6 GHz for the various kinds of space services and for radio astronomy, 2.8 GHz of which were for communication satellites. After the Conference, about 15 per cent of the Table of Frequency Allocations was available for outer space. more>

Updates from Georgia Tech

Looking Back in Time to Watch for a Different Kind of Black Hole
By John Toon – Black holes form when stars die, allowing the matter in them to collapse into an extremely dense object from which not even light can escape. Astronomers theorize that massive black holes could also form at the birth of a galaxy, but so far nobody has been able to look far enough back in time to observe the conditions creating these direct collapse black holes (DCBH).

The James Webb Space Telescope, scheduled for launch in 2021, might be able look far enough back into the early Universe to see a galaxy hosting a nascent massive black hole. Now, a simulation done by researchers at the Georgia Institute of Technology has suggested what astronomers should look for if they search the skies for a DCBH in its early stages.

DCBH formation would be initiated by the collapse of a large cloud of gas during the early formation of a galaxy, said John H. Wise, a professor in Georgia Tech’s School of Physics and the Center for Relativistic Astrophysics. But before astronomers could hope to catch this formation, they would have to know what to look for in the spectra that the telescope could detect, which is principally infrared.

Black holes take about a million years to form, a blip in galactic time. In the DCBH simulation, that first step involves gas collapsing into a supermassive star as much as 100,000 times more massive than our sun. The star then undergoes gravitational instability and collapses into itself to form a massive black hole. Radiation from the black hole then triggers the formation of stars over period of about 500,000 years, the simulation suggested. more>

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Anthropic arrogance

By David P Barash – Welcome to the ‘anthropic principle’, a kind of Goldilocks phenomenon or ‘intelligent design’ for the whole Universe. According to its proponents, the Universe is fine-tuned for human life.

The message is clearly an artificial one and not the result of random noise. Or maybe the Universe itself is alive, and the various physical and mathematical constants are part of its metabolism. Such speculation is great fun, but it’s science fiction, not science.

It should be clear at this point that the anthropic argument readily devolves – or dissolves – into speculative philosophy and even theology. Indeed, it is reminiscent of the ‘God of the gaps’ perspective, in which God is posited whenever science hasn’t (yet) provided an answer.

Calling upon God whenever there is a gap in our scientific understanding may be tempting, but it is not even popular among theologians, because as science grows, the gaps – and thus, God – shrinks. It remains to be seen whether the anthropic principle, in whatever form, succeeds in expanding our sense of ourselves beyond that illuminated by science. I wouldn’t bet on it. more>

The Next Trend In Travel Is… Don’t.

By Allison Jane Smith – Bali is in the midst of an ecological crisis. Half of the Indonesian island’s rivers have dried up. Its beaches are eroding. In 2017, officials declared a “garbage emergency” across a six-kilometer stretch of Bali’s coast. At the peak of the clean-up, hundreds of cleaners removed 100 tons of debris from the beaches each day.

The cause? Too many tourists — who just keep coming. This year, the Indonesian tourism ministry hopes Bali attracts 7 million foreign tourists, to an island of only 4 million residents.

Bali is one among many places to feel the ill effects of mass tourism. Thailand closed an entire island because litter and food waste from tourists were destroying the island’s ecosystem.

In Venice, Italy, colossal cruise ships tear straight through the city and affordable Airbnb options push residents out of the housing market.

Across Spain, anti-tourism graffiti can be found in Barcelona, San Sebastian, Bilbao, and Mallorca, declaring “tourism kills,” “tourists go home” and “why call it tourism season if we can’t shoot them?”

When tourism dominates an economy, some governments prioritize tourists over their own citizens. Around the world, people are evicted from their homes to make way for tourism developments.

Globally, displacement for tourism development — including hotels, resorts, airports, and cruise ports — is a growing problem. In India, tens of thousands of indigenous people were illegally evicted from villages inside tiger reserves.

No wonder even those in the business of selling travel are urging tourists to reconsider visiting certain destinations. more>

Local Solutions for Global Problems

By Sébastien Turbot – Historically, cities have played a marginal role in global debates. In the United States, for example, early cities were rife with corruption and factionalism; local politics was messy enough. But today’s urban centers are economically stronger and politically bolder. Twenty-first-century cities’ determination to act in their own interests became clear in late 2017, when more than 50 US mayors pledged to meet the commitments of the 2015 Paris climate agreement – directly challenging President Donald Trump’s withdrawal from the deal.

Even without a seat at the table (G7), many of the world’s megacities – powered by strong human capital, competitive markets, and widespread appeal – are already working to build a more progressive, inclusive, and sustainable future. From Buenos Aires to Tokyo, city leaders are making their concerns known globally – often irrespective of national agendas.

Small and mid-sized cities are also raising their international profiles. By investing in “smart” and “resilient” urban planning, governments from Bordeaux in France to Curitiba in Brazil are strengthening their brand identities and luring talent, investment, and businesses from around the world.

Cities power growth through innovation, trade, and exchange. And city services are often more visible to citizens than federal aid; consider, for example, who responds during a traffic accident or a natural disaster.

To be sure, today’s cities face many challenges. more>

Updates from Georgia Tech

Human Factors Research Helps Accelerate Mission Planning
By John Toon – The key to a successful flight mission is planning – sometimes several hours of it. Georgia Tech Research Institute (GTRI) specialists in human factors and human computer interfaces are working with NAVAIR PMA-281, Strike Planning and Execution Systems in Patuxent River, Maryland, to streamline the current mission planning process and identify user interface requirements supporting multi-domain mission management in next-generation naval planning capabilities.

With guidance from the GTRI researchers, the project will improve usability of the mission planning software tools, creating a more consistent and intuitive screen design that’s easier to learn and more logical to follow. This effort could benefit all Department of Defense (DoD) agencies for collaborative mission planning.

“We are working with Navy and Marine Corps aviators to identify areas in mission planning where work-flow can be streamlined, reducing the time required to mission plan,” said Marcia Crosland, project director for GTRI’s Joint Mission Planning System (JMPS) User Interface Design and Usability efforts. “Our task has been to define the user interface concepts and decision-making tools to help reduce the time required for mission planning. We’ve created detailed designs and specifications to direct current and future development of mission planning systems.” more>

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Updates from Georgia Tech

Robot Monitors Chicken Houses and Retrieves Eggs
By John Toon – “Today’s challenge is to teach a robot how to move in environments that have dynamic, unpredictable obstacles, such as chickens,” said Colin Usher, a research scientist in GTRI’s Food Processing Technology Division.

“When busy farmers must spend time in chicken houses, they are losing money and opportunities elsewhere on the farm. In addition, there is a labor shortage when it comes to finding workers to carry out manual tasks such as picking up floor eggs and simply monitoring the flocks. If a robot could successfully operate autonomously in a chicken house 24 hours a day and seven days a week, it could then pick up floor eggs, monitor machinery, and check on birds, among other things. By assigning one robot to each chicken house, we could also greatly reduce the potential for introductions of disease or cross-contamination from one house to other houses.”

The autonomous robot is outfitted with an ultrasonic localization system similar to GPS but more suited to an indoor environment where GPS might not be available. This system uses low-cost, ultrasonic beacons indicating the robot’s orientation and its location in a chicken house. The robot also carries a commercially available time-of-flight camera, which provides three-dimensional (3D) depth data by emitting light signals and then measuring how long they take to return. The localization and 3D data together allow the robot’s software to devise navigation plans around chickens to perform tasks. more>

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Guns and the British empire

BOOK REVIEW

Empire of Guns: The Violent Making of the Industrial Revolution, Author: Priya Satia.
An Enquiry into the Nature and Causes of the Wealth of Nations, Author: Adam Smith.

By Priya Satia – In the mid-18th century, advanced areas of northwest Europe and east and south Asia enjoyed roughly comparable life expectancy, rates of consumption, and potential for economic growth. But around 1800, in what scholars call the ‘great divergence’, the power and wealth of the West suddenly and dramatically eclipsed that of India, China and the Ottoman Empire.

The British in particular found vindication for their expanding empire in ideas of cultural and racial superiority.

Concerned about Britain’s aggressive pursuit of empire, Adam Smith presumed that the universal capacity for knowledge-sharing would ultimately right the wrongs of colonialism.

We know that history did not play out that way. Why not? Why didn’t knowledge-sharing equalize the world? Was Smith too generous or naive in believing that it had cultural purchase beyond Europe?

Smith’s naivety in fact lay in his presumption that the emerging political inequalities that he observed would not also shape the spread of knowledge. Like liberal thinkers today, he imagined that knowledge-exchange somehow transpires regardless of power relations.

In reality, in the 18th century, as now, power shaped knowledge-sharing everywhere.

In Britain, for instance, government offices engaged in military supply often prohibited contractors from patenting their inventions: a patent would slow the spread of innovation to other contractors and thus slow the production of urgently needed supplies.

While the British government thus abetted the sharing of know-how within Britain, it actively stifled such sharing abroad.

British industrialists copied Asian textiles and pottery without scrupling over ‘intellectual property’, but could rely on their government to minimize the threat of colonial competition with their own manufactures. more>

Updates from Georgia Tech

Researchers Boost Efficiency and Stability of Optical Rectennas
By John Toon – The research team that announced the first optical rectenna in 2015 is now reporting a two-fold efficiency improvement in the devices — and a switch to air-stable diode materials. The improvements could allow the rectennas – which convert electromagnetic fields at optical frequencies directly to electrical current – to operate low-power devices such as temperature sensors.

Optical rectennas operate by coupling the light’s electromagnetic field to an antenna, in this case an array of multiwall carbon nanotubes whose ends have been opened. The electromagnetic field creates an oscillation in the antenna, producing an alternating flow of electrons. When the electron flow reaches a peak at one end of the antenna, the diode closes, trapping the electrons, then re-opens to capture the next oscillation, creating a current flow.

The switching must occur at terahertz frequencies to match the light. The junction between the antenna and diode must provide minimal resistance to electrons flowing through it while open, yet prevent leakage while closed.

“The name of the game is maximizing the number of electrons that get excited in the carbon nanotube, and then having a switch that is fast enough to capture them at their peak,” Baratunde Cola, explained. “The faster you switch, the more electrons you can catch on one side of the oscillation.” more>

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When exponential innovation meets the infancy of “Industry X.0”


Accenture – With everything from agriculture to aeronautics in the midst of paradigm shift, a cautious approach to adopting new technologies simply can’t keep pace.

Nor will adopting just one innovation suffice. Effective adaptation almost always involves a combination of innovations working together: a dash of machine learning here, a sprinkle of automation there.

As Accenture Chief Strategy Officer Omar Abbosh describes: “You’re combining a series of innovations, one on the back of the next, to do something fundamentally different… You’ve all heard about Big Data and artificial intelligence and internet of things… They are all very meaningful in their own right, but when they come together they can have a massive impact on business and society.”

The benefits of combination abound. For example, amalgamating just five technologies—autonomous robots, AI, 3D printing, big data, and blockchain—could save industrial-equipment companies a total of $1.6 billion. more>