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Thursday, February 24, 2005

A paste containing synthetic tooth enamel can seal small cavities without drilling. Kazue Yamagishi and colleagues at the FAP Dental Institute in Tokyo say that the paste can repair small cavities in 15 minutes.

Currently, fillers don’t stick to such small cavities so dentists must drill bigger holes. Hydroxyapatite crystals, of which natural enamel is made, bond with teeth to repair tiny areas of damage.

Yamagishi and colleagues have tested their paste on a lower premolar tooth that showed early signs of decay. They found that the synthetic enamel merged with the natural enamel. The synthetic enamel also appears to make teeth stronger which will improve resistance to future decay. As with drilling, however, there is still the potential for pain: The paste is strongly acidic to encourage crystal growth and causes inflammation if it touches the gums.

The paste is reported in the journal Nature.

Friday, March 16, 2007

The European Space Agency‘s Mars Express spacecraft has discovered ice deposits in the south pole of Mars that are larger than the state of Texas.

Scientists say that there is enough water in the deposits to cover the entire planet with up to 36 feet of water if the ice was to melt. Some sections of the ice deposits are up to 2.3 – 2.5 miles deep. The ice is composed of carbon dioxide, a little bit of dust, and water (90 percent of the water is estimated to be frozen).

What has caught the attention of the scientists working on the Mars Express project is that this may help reveal whether or not there is any (microbial) life within the ice.

Another perplexing question that scientists are trying to solve is what happened to all the water that produced all the channels on the surface of Mars.

Jeffrey Plaut, who is from NASA’s Jet Propulsion Laboratory in Pasadena, California and who is also leading the study, noted that, “We have this continuing question facing us in studies of Mars, which is: where did all the water go? Even if you took the water in these two (polar) ice caps and added it all up, it’s still not nearly enough to do all of the work that we’ve seen that the water has done across the surface of Mars in its history.”

Currently, only 10 percent of the water is remaining and is located at the poles of Mars. It has been suggested that some of the remaining 90 percent of the water that disappeared could either be underground or could have simply left the atmosphere into space.

Tuesday, January 26, 2010

The mystery of the location of a viewpoint used by English painter John Constable has been solved, after nearly 200 years. The Stour Valley and Dedham Church was painted in Suffolk, England, between 1814 and 1815, but changes to the landscape meant that the spot he chose was not known, despite the best efforts of historians and art experts.

Now the puzzle has been answered. Martin Atkinson, who works for the National Trust as property manager for East Suffolk, used clues from the painting and looked at old maps to track down the viewpoint. Trees had grown, a hedgerow had been planted and boundaries had moved or disappeared, but Atkinson eventually worked out where Constable had stood. He said, “When I discovered that I had worked out the location where Constable painted this particular masterpiece, I couldn’t believe it. All the pieces of the jigsaw finally fitted together.”

Atkinson used an 1817 map of East Bergholt, where Constable grew up, as a reference point, but found that the view would have changed not long after the painting was completed. “The foreground didn’t fit at all, it was quite unusual as we know Constable painted it in the open air so he would have been standing in the scene. The hedgerow in his work no longer exists and there’s another hedgerow that runs across the scene today which wasn’t there. When you stand on the road on which he would have stood, and use the oak tree as a reference point, you see the same view. It’s great to see where an old master stood – and be inspired by the same view,” he said.

Suffolk, where Constable painted many of his finest paintings, is often called “Constable country”. Most, but not all, of the locations that Constable depicted are known. The picture is now housed in the Museum of Fine Arts, Boston, Massachusetts.

Thursday, October 4, 2007

Rick Morelli is running for the NDP in the Ontario provincial election, in the Vaughan riding. Wikinews’ Nick Moreau interviewed him regarding his values, his experience, and his campaign.

Stay tuned for further interviews; every candidate from every party is eligible, and will be contacted. Expect interviews from Liberals, Progressive Conservatives, New Democratic Party members, Ontario Greens, as well as members from the Family Coalition, Freedom, Communist, Libertarian, and Confederation of Regions parties, as well as independents.

Friday, February 16, 2018

On Tuesday, the city council of Berkeley, California adopted by unanimous vote a resolution declaring their city a “sanctuary” for adult recreational cannabis use and sale. The resolution by the Berkeley council “declared [the City of Berkeley] to be a sanctuary for recreational cannabis customers, providers, and landlords.”

The resolution bars city employees including police from assisting federal law enforcement officials, namely the U.S. Drug Enforcement Administration, in enforcing federal laws relating to cannabis. The city’s measure includes protection for cannabis, but not other substances controlled and regulated by the federal government. California voters approved a referendum in 2016 that legalized cannabis production and sale in the state. That law took effect on January 1 this year.

The resolution was drafted by Mayor Jesse Arreguin and Councilmembers Ben Bartlett and Cheryl Davila.

While cannabis became legal for adults at least 21 years old under California state law, it remains a prohibited substance under the federal Controlled Substances Act. Under the U.S. Constitution, federal law is given supremacy to contradictory state and local law.

In 2008, the city previously declared itself a sanctuary city for medical cannabis, opposing federal officials seeking to shutter legal-in-California cannabis dispensaries.

In a tweet following the vote, the Berkeley mayor wrote, “In light of threats by Attorney General [Jeff] Sessions regarding a misguided crackdown on our democratic decision to legalize recreational cannabis, we have become what may be the first city in the country to declare ourselves a sanctuary city for cannabis.” The attorney general is the top federal law enforcement official in the U.S.

Last month, Sessions repealed a policy from the previous presidential administration providing legal shelter to states that legalized recreational cannabis. A January 4 memo from Sessions called for Justice Department prosecutors to enforce the federal ban on cannabis use and sale.

By another vote during the same meeting the city council reduced the sales tax on cannabis from 10 percent to 5 percent in a bid to draw more business.

Sunday, April 24, 2005

New York Stock Exchange (NYSE) announced last Wednesday that it has agreed definitively to merge with Chicago-based Archipelago Exchange (ArcaEx) and form a new publicly traded, for-profit company known as NYSE Group. This announcement was followed two days later by NASDAQ®, which independently announced a definitive agreement to purchase Instinet Group.

Archipelago and Instinet are innovative e-trading (electronic trading) companies, and formerly were the two largest American rivals to NYSE and NASDAQ, in recent years taking increasingly large portions of their market share. The Securities and Exchange Commission (SEC) and other regulatory agencies still have to review and approve the transactions, particularly with respect to US securities law and antitrust law, in order to ensure that the marketplace remains lawful and competitive.

Other pending issues for NASDAQ include obtaining the approval of Instinet shareholders, as well as customary closing conditions. NYSE must obtain the approval of its members and Archipelago shareholders.

These changes, a reaction to increased e-trading competition and a changed regulatory environment, will result in NASDAQ and NYSE trading each other’s shares and attempting to grab market share, which many hope will drive down transaction costs and ultimately benefit consumers. However, at least one commentator, Dan Ackman writing in Forbes, has noted that the trading commission at the NYSE currently averages less than a nickel (US$0.05) per share, and was less enthusiastic about potential efficiency gains from electronic trading at the exchange.

The transactions are also intended to make the two leading American stock exchanges more globally competitive with such exchanges as the London Stock Exchange, the Frankfurt Stock Exchange, the Toronto Stock Exchange, and the Australian Stock Exchange located in Sydney.

See the discussion page for instructions on adding schools to this list and for an alphabetically arranged listing of schools.

Due to the damage by Hurricane Katrina and subsequent flooding, a number of colleges and universities in the New Orleans metropolitan area will not be able to hold classes for the fall 2005 semester. It is estimated that 75,000 to 100,000 students have been displaced. [1]. In response, institutions across the United States and Canada are offering late registration for displaced students so that their academic progress is not unduly delayed. Some are offering free or reduced admission to displaced students. At some universities, especially state universities, this offer is limited to residents of the area.