Wednesday, September 19, 2007

NASA is beginning the final preparations for next Wednesday’s launch of the Dawn probe, aboard a Delta II rocket. The Dawn probe, costing over US$250 million, will visit the dwarf planet Ceres and the asteroid Vesta. The launch was originally planned for mid-June, however due to a damaged crate, shipping delays, and a damaged solar panel, NASA chose to delay it until now. Last week the spacecraft was delivered to the launch pad, and engineers performed tests to ensure that it is ready for launch. Today, the payload fairings were installed, and the probe is ready for its launch next week onto its 5 billion kilometer (3.2 billion mile) mission.

As the Delta II launches, three stages of rockets will propel the probe towards its first target. With the help of ion thrusters, it will reach Mars in mid-2009. Using Mars’ gravity, the probe will speed up and proceed towards the first asteroid, Vesta, in late 2011. After orbiting for seven months, it will leave Vesta in mid-2012, and arrive at Ceres in 2015. After making scans of Ceres, it will enter an orbit around Ceres that will ensure that it does not impact the asteroid for half a century. This is required due to the United Nations’ “Outer Space Treaty”, which states that “harmful contamination” of these asteroids must be avoided.

The targets of this mission, Ceres and Vesta, couldn’t be less alike. Ceres (diameter 975 km, 600 miles) is larger than Vesta (578 km, 350 miles). This makes Ceres approximately the size of Texas. NASA believes Ceres could contain water beneath its outer crust because, like Earth, its inner layers are heavier than the outer layers, and Ceres’ outer layer is lighter than water. Vesta, on the other hand, is the size of Arizona, and has a surface of volcanic rock, which astronomers believe came from its hot inner layers. Vesta also has a large crater – almost 500 km (300 miles) across – on its southern pole. The collision that caused this likely blasted enough rock into space to fill a container 160 by 160 by 80 km (100 by 100 by 50 miles).

The probe will make several observations of these asteroids: it will compare the makeup, shape, size, and densities, analyze craters, and determine mass, gravity, rotation. To determine the makeup, the probe carries a mapping spectrometer, and tools to map emissions of neutrons and gamma rays. Using this information, NASA can compare the formation of these bodies to learn more about our solar system, for example, to test a theory which states that a number of stony meteorites may be debris from Vesta.

There’s one more piece of equipment aboard the probe: A small silicon chip containing the names of 350,000 people who submitted their names to the “Send Your Name to the Asteroid Belt” campaign. After next week’s launch, the spacecraft will deploy its solar panels and undergo two months of testing before it begins the cruise to Mars.

Sunday, August 21, 2005

A robotic system at Stanford Medical Center was used to perform a laparoscopic gastric bypass surgery successfully with a theoretically similar rate of complications to that seen in standard operations. However, as there were only 10 people in the experimental group (and another 10 in the control group), this is not a statistically significant sample.

If this surgical procedure is as successful in large-scale studies, it may lead the way for the use of robotic surgery in even more delicate procedures, such as heart surgery. Note that this is not a fully automated system, as a human doctor controls the operation via remote control. Laparoscopic gastric bypass surgery is a treatment for obesity.

There were concerns that doctors, in the future, might only be trained in the remote control procedure. Ronald G. Latimer, M.D., of Santa Barbara, CA, warned “The fact that surgeons may have to open the patient or might actually need to revert to standard laparoscopic techniques demands that this basic training be a requirement before a robot is purchased. Robots do malfunction, so a backup system is imperative. We should not be seduced to buy this instrument to train surgeons if they are not able to do the primary operations themselves.”

There are precedents for just such a problem occurring. A previous “new technology”, the electrocardiogram (ECG), has lead to a lack of basic education on the older technology, the stethoscope. As a result, many heart conditions now go undiagnosed, especially in children and others who rarely undergo an ECG procedure.

Sunday, August 21, 2005

A robotic system at Stanford Medical Center was used to perform a laparoscopic gastric bypass surgery successfully with a theoretically similar rate of complications to that seen in standard operations. However, as there were only 10 people in the experimental group (and another 10 in the control group), this is not a statistically significant sample.

If this surgical procedure is as successful in large-scale studies, it may lead the way for the use of robotic surgery in even more delicate procedures, such as heart surgery. Note that this is not a fully automated system, as a human doctor controls the operation via remote control. Laparoscopic gastric bypass surgery is a treatment for obesity.

There were concerns that doctors, in the future, might only be trained in the remote control procedure. Ronald G. Latimer, M.D., of Santa Barbara, CA, warned “The fact that surgeons may have to open the patient or might actually need to revert to standard laparoscopic techniques demands that this basic training be a requirement before a robot is purchased. Robots do malfunction, so a backup system is imperative. We should not be seduced to buy this instrument to train surgeons if they are not able to do the primary operations themselves.”

There are precedents for just such a problem occurring. A previous “new technology”, the electrocardiogram (ECG), has lead to a lack of basic education on the older technology, the stethoscope. As a result, many heart conditions now go undiagnosed, especially in children and others who rarely undergo an ECG procedure.

Monday, March 30, 2009

First becoming famous in her native Ukraine in the 1990s, long-haired self-described “Amazon” Ruslana gained international recognition for winning the 2004 Eurovision Song Contest with her song “Wild Dances,” inspired by the musical traditions of the Hutsul people of the Ukrainian Carpathian Mountains.

In the five years since, Ruslana has decided to use her name and public status to represent a number of worthy causes, including human trafficking, renewable energy, and even the basic concept of democratic process, becoming a public face of Ukraine’s Orange Revolution and later serving in Parliament.

Currently, she is on an international publicity tour to promote her album Wild Energy, a project borne out of a science fiction novel that has come to symbolize her hopes for a newer, better, freer way of life for everyone in the world. She took time to respond to questions Wikinews’s Mike Halterman posed to her about her career in music and her other endeavors.

This is the fifth in a series of interviews with past Eurovision contestants, which will be published sporadically in the lead-up to mid-May’s next contest in Moscow.

Sunday, September 28, 2008

Four people have been arrested on terrorism charges in Islington, London, England, after a suspected petrol bombing on the house of Martin Rynja, owner of book publishing company Gibson Square.

His company recently sparked controversy after buying the rights to publish The Jewel of Medina, a work of fiction by Sherry Jones depicting the Muslim prophet Muhammad and his child bride, Aisha.

The bombing, which occurred in the early hours of Saturday morning, led to the evacuation of the £2.5 million property in Lonsdale Square. Three men, aged 22, 30 and 40, were arrested at 2:25am BST by armed officers, two in Lonsdale Square, and one after being stopped near Angel tube station.

Police comments suggested that the trio had been under surveillance, and that they had advance knowledge of the plot and simply waited for the arsonists to strike, before arresting them.

On Saturday, a woman was arrested for obstructing police during their searches of four addresses – two in Walthamstow, and two in Ilford and Forest Gate.

Speaking earlier this month, Mr Rynja said that “The Jewel of Medina has become an important barometer of our time. As an independent publishing company, we feel strongly that we should not be afraid of the consequences of debate.” Ms Jones commented that she did not intend for her novel to be offensive to Islam. She noted that she “[has] deliberately and consciously written respectfully about Islam and Muhammad.” She “envisaged that [her] book would be a bridge builder” between Islam and the western world.