Thursday, January 12, 2017

United States President Barack Obama gave his official farewell address on Tuesday night from McCormick Place in Chicago, reflecting on personal and national accomplishments. This is expected to be his last major speech before officially handing the reins to president-elect Donald Trump on January 20.

Obama’s speech was wide-ranging. He thanked his family and the nation, spoke of the need for unity, noted the country’s accomplishments and need for improvement in areas like education and civil rights, and spoke about the need for pride in U.S. accomplishments, citing milestones of U.S. history and of his presidency specifically. “It’s why GIs gave their lives at Omaha Beach and Iwo Jima; Iraq and Afghanistan – and why men and women from Selma to Stonewall were prepared to give theirs as well.”

The president also addressed his country’s troubled history with race and racism, an issue many black citizens feel he has avoided. Despite this, Chauncy Devega of Salon described the president as “a role model of calm, cool reflective black masculinity: a man utterly at home in his own skin.” Obama described the concept of a post-racial U.S. “unrealistic” and particularly cited the need for reform in education and the criminal justice system and greater acceptance of scientific evidence, particularly evidence supporting action to counteract climate change.

However, publications including The Washington Post and Salon have given particular focus to another aspect of the president’s address: the country’s increasing political tensions and controversies involving access to news and information, both accurate and inaccurate. “We become so secure and our bubbles,” said Obama, “that we start accepting only information, whether it’s true or not, that fits our opinions instead of basing our opinions on the evidence that is out there,” calling this trend “a third threat to our democracy.”

The Washington Post characterized Obama’s comment, “If every economic issue is framed as a struggle between a hard-working white middle class and an undeserving minority, then workers of all shades will be left fighting for scraps while the wealthy withdraw further into their private enclaves,” as a “not-so-subtle jab” at the campaign tactics of President-elect Donald Trump. The Telegraph describes Obama’s warnings about the need to protect democracy as “a thinly veiled slight to the divisive rhetoric of Donald Trump’s election campaign, which included attacks on Muslims, the disabled, women and immigrants.” The president went on to call on the public to “reject the first dawning of every attempt to alienate any portion of our country from the rest or to enfeeble the sacred ties that make us one America. We weaken those ties when we allow our political dialogue to become so corrosive […] We weaken those ties when we define some of us as more American than others when we write off the whole system as inevitably corrupt and when we sit back and blame the leaders we elect without examining our own role in electing them. It falls to each of us to be those anxious, jealous guardians of our democracy.”

Despite this, when the mention of Donald Trump brought boos from the crowd, Obama reiterated the importance of the long history of peaceful transfers of power from one president to the next: “No no no no no. […] I committed to President-elect Trump that my administration would ensure the smoothest possible transition, just as President Bush did for me.” However, this was not unaccompanied by a call to action. Near the end of the speech, he insisted citizens dissatisfied with elected officials should “lace up your shoes, grab a clipboard, get some signatures and run for office yourself.”

Overall, the departing president’s speech focused on accomplishment, echoing the “Yes we can” slogan from his 2008 campaign: “If I have told you eight years ago, that America would reverse a great recession, reboot our auto industry, and unleash the longest stretch of job creation in our history. If I had told you, that we would open up a new chapter with the Cuban people, shut down Iran’s nuclear weapons program without firing a shot, take out the mastermind of 9/11[…] If I had told you that we would win a marriage equality and secure the right to health insurance for another twenty million of our fellow citizens. If I had told you all that, you might have said our sights were set a little too high. But that’s what we did.”

But when the crowd began shouting “Four more years! Four more years!” Obama, with a small laugh, answered, “I can’t do that.”

Sunday, August 29, 2010

A University of Tokyo group of researchers, led by bioengineer Shoji Takeuchi, has made an electronic sensor capable of smelling gases. The sensor uses genetically engineered frog cells. Since previous sensors were not very accurate, the scientist decided to try a biological approach. The invention was revealed in a US scientific journal yesterday, and is supposed to be used to design better machines to detect polluting gases in the atmosphere.

Previous smell sensors were based on quartz rods, which vibrate when a substance binds to them. The gases are distinguished by their molar masses, which can be similar for molecules with different structure, thus relatively often triggering a false positive. Trying to find a more accurate solution, Takeuchi decided to follow an example from insect world. As he explained, “when you think about the mosquito, it is able to find people because of carbon dioxide from the human. So the mosquito has CO₂ receptors. When we can (extract) DNA (from the mosquito) we can put this DNA into the frog eggs to detect CO₂.”

Genes of several insects (the silk moth, diamondback moth and fruit fly), injected into African clawed frog Xenopus laevis eggs, allowed them to produce relatively inexpensive and useful sensors. The choice of the species was caused by their widely studied and well-understood protein expression mechanism.

The modified cells responded to three kinds of pheromones and one odourant, which have similar chemical properties. When a molecule of an odorous substance adhered to the receptor on the membrane protein, ion channels opened for a certain period of time, and a current was generated. Its magnitude was clearly different for all four tested substances, allowing to distinguish between them accurately.

The colleagues embedded the sensor into a mannequin, so that it could shake its head when a gas was detected. It was easier to observe. Pheromones and molecules with quite similar molecule structure produced clearly distinguishable reaction, with higher accuracy than other biological or human-made sensors. As the research group said, the detection sensitivity of the odor sensor is several tens of parts per billion (ppb), and it is as high as the sensitivity of an existing odor sensor that uses an oxide semiconductor. The distinctive feature of the new sensor is its capability to selectively detect some odorous substances, rather than its sensitivity. Very few false positives were possible due to the biological mechanism involved.

At normal temperature, the sensor lifetime is about 12 hours, which can be extended by putting it into a refrigerator before first use.

Shoji Takeuchi says has a great hope for research use in future, since the frog eggs are very practical for genetic engineering, and can be conveniently used to develop smell sensors for a wide range of gases. He said, “The X. laevis oocyte has high versatility for the development of chemical sensors for various odorants. We believe that a shared ability to smell might open a new relationship between man and robot. .. The research will have wide implications… If the sensor is embedded in a nursing robot, it will be able to identify certain mouth odors or body odors. Also, it can be used for detecting CO₂, air pollution, water pollution and food. It’s very important for the environment.”

Sunday, February 4, 2007

Fourteen houses have been destroyed and another 3 damaged by a bush fire burning in Jarrah forests and farmland near the historical timber town of Dwellingup 70km south east of Perth, Western Australia.

The fire has also destroyed approximately 100 power poles, leading to a loss of telecommunication services to the town and affecting water supplies. Mobile generators have been installed for emergency power.

Steve Slavin, spokesman for Department of Environment and Conservation (DEC), said that 250 fire-fighters are containing the fire with crews concentrating on the southern front, which is now within 3 km of the town.

Mr Slavin said “Our concern is that winds this afternoon will be swinging around to the south and increasing in intensity.” “It’s making us nervous. The advice we’re giving to people in Dwellingup is if they’ve decided that they will leave, this would be a good time to do it”

In separate fires near North Yunderup, Greenfields and Parkland have affected transmission lines supplying power to approximately 56,000 properties.

Additional fires are burning near Toodyay 85km north east of Perth, Another fire is burning near Williams approximately 160 south east of Perth and 90Km east of Dwellingup. And in the southern rural suburb of Forrestdale. These fires are reported to be under control.

Western Australian Police Arson squad are investigating these fires as some appear to be deliberately lit. The Police are also investigating the death of a women in her mid 20’s who died on Saturday after her car rolled while fleeing the fire near Toodyay.

Friday, July 15, 2011

On Tuesday, the Euro fell to a new record low in relation to the Swiss Franc, and to multi-month lows against the U.S. Dollar and Japanese yen; all considered by investors to be safe currencies during times of economic turmoil.

The Wall Street Journal reported earlier that recent comments from the newly installed head of the International Monetary Fund, France’s Christine Lagarde, resulted in a sell-off of the Euro. At a roundtable discussion in Washington, Lagarde noted that the IMF had not yet reached discussion of terms and conditions of a second Greek bailout plan. In fact, a representative from the IMF is currently meeting with Eurozone policymakers to draft such a new proposal. The yield differential between Italian bonds and German bonds has spread to more than 300 basis points, something not seen in over a decade and evidence of investors’ concern.

Adding to the Euro’s woes is the upcoming release of the bank stress tests on Friday. The European Bankers Association said that they expect the data release to shed new light on the Eurozone’s banking situation. Representatives of several of the Eurozone’s governments, including Germany, have requested that the association consider releasing fewer specific details for fear that investor panic will ensue. The inadequacy of the capitalization rates has been an issue with the European Central Bank, whose president recently called upon Eurozone banks to make every effort to put their balance sheets in order.

For the time being at least, an unsubstantiated rumor reported by the Wall Street Journal states that the Eurozone’s central banks’ purchase of periphery debt has helped to quell the downward momentum of the Euro.