Scientists map melting history of Greenland’s ice sheet

Washington, September 17 (ANI): Researchers from the Niels Bohr Institute at the University of Copenhagen have mapped the history of the melting of the Greenland ice sheet.

Numerous drillings have been made through both Greenland’s ice sheet and small ice caps near the coast.

By analyzing every single annual layer in the kilometres long ice cores, researchers can get detailed information about the climate of the past.

But now, the Danish researcher Bo Vinther and colleagues from the Centre for Ice and Climate at the Niels Bohr Institute, University of Copenhagen, in collaboration with researchers from Canada, France and Russia, have found an entirely new way of interpreting the information from the ice core drillings.

“Ice cores from different drillings show different climate histories. This could be because they were drilled at very different places on and near Greenland, but it could also be due to changes in the elevation of the ice sheet, because the elevation itself causes different temperatures,” explained Bo Vinther about the theory.

Today, the ice sheet is more than three kilometres thick at its highest point and thinning out towards the coast.

Four of the drillings analyzed are from the central ice sheet, while two of the drillings are from small ice caps outside of the ice sheet itself.

By comparing the Oxygen-18 content in all of the annual layers from the four drillings through the ice sheet with the Oxygen-18 content of the same annual layers in the small ice caps, Bo Vinther has calculated the elevation course through 11,700 years.

Just after the ice age the elevation of the ice sheet rose slightly because when the climate transitions from ice age to warm age, there is a rapid increase in precipitation.

But at the same time, the areas lying near the coast begin to decrease in size, because the ice is melting at the edge.

When the ice melts at the edge, it slowly causes the entire ice sheet to ‘collapse’ and become lower.

The calculations show that in the course of about 3,000 years, the elevation changed and became up to 600 meters lower in the coastal areas.

But in the middle, it was a slow process, where the elevation decreased around 150 meters in the course of around 6,000 years.

It then stabilized.

The new results show the evolution of elevation of the ice sheet throughout 11,700 years and they show that the ice sheet is very sensitive to the temperature.

The results can be used to make new calculations for models predicting future consequences of climate changes. (ANI)

Man U veteran Giggs looking forward to `dream’ Champions League final

London, May 21 (ANI) Manchester United veteran Ryan Giggs is looking forward to the Champions League final against Barcelona FC to be played in Rome at the end of the month, and labeled it a “dream final”.

Giggs believes next Wednesday’s match in Rome is the one most neutrals wanted and will decide who is genuinely the best team in Europe because it pits together the champions of the two strongest leagues in Europe.

“It is the dream final. It is between the two best clubs from the two top leagues and both have won their domestic titles this year – and in our case three years in a row. Coupled with the performances of the two clubs in the Champions League this season it is a match everybody is looking forward to, including the players,” The Sun quoted Giggs, as saying.
“United and Barca are both massive clubs with proud histories. We both play football the right way and have so many individual talents. I hope it is a free-flowing game with lots of goals but sometimes two teams can cancel each other out. I hope that’s not the case,” he added.
Giggs also admitted that Manchester United cannot afford to concentrate solely on keeping Barca’s Argentine striker Lionel Messi quiet, just as Barca would be foolish to think that keeping Cristiano Ronaldo on a tight leash will totally blunt United’s attacking edge.

He said: “Messi and Ronaldo are two of the best players in the world. Of course, we have to recognise Barca’s danger men but we have to remember that they are also a very good all-round team. They have so many top players and that’s why they are in the European Cup final. We have to look after every player and it will be the same for them.” (ANI)

Previous work experience not always good for new job

Washington, Feb 24 (ANI): Previous work experience not always good for new job

Employees with previous work experience bring valuable knowledge and skills to their new jobs – but some of what they learned may actually hurt their work performance, that’s the conclusion of a new study.

The study suggests that previous work experience isn’t always goofor new employees. Workers may keep some old habits and ways of doing things that hurt performance in their new roles.

“Organizations pay a premium for workers with job experience that will allow them to just step in and start contributing immediately. But what employers don’t realize is that some of what their employees learned in previous jobs will end up being a negative,” said Steffanie Wilk, co-author of the study and associate professor of management and human resources at Ohio State University’s Fisher College of Business.

Wilk said that while employers have always assumed that it is good for new employees to have prior experience, previous research has not always found such a clear advantage.

And the new study is one of the first that has been able to explain why, by separating the positive and negative effects of prior employment experience on a current job.

Wilk and colleagues conducted the study with data from 771 employees and job applicants of two call centers for a major U.S. insurance firm.

They examined the employees’ job performance evaluations and separate ratings of the employees’ work-related skills and knowledge.

The researchers compared these performance and skills evaluations with the employees’ prior work histories and experience at the current firm, to find any relationships.

The results showed that prior work experience at other firms did lead to higher levels of skill and knowledge, which led to better performance reviews at the insurance company.

However, the researchers also found that the longer employees were with the insurance company, the less that experience from previous jobs helped with their performance.

According to the findings, the negative effects from previous experience lingered much longer.

And once the researchers took into account the higher levels of skill and knowledge brought from former jobs, previous experience actually led to lower performance at the insurance company.

In other words, the positive effects of knowledge and skill brought by experienced employees were being at least somewhat balanced by negative factors, the authors concluded.

The study appears in the current issue of the journal Organization Science. (ANI)

Previous work experience not always good for new job

Washington, Feb 24 (ANI): Previous work experience not always good for new job

Employees with previous work experience bring valuable knowledge and skills to their new jobs – but some of what they learned may actually hurt their work performance, that’s the conclusion of a new study.

The study suggests that previous work experience isn’t always goofor new employees. Workers may keep some old habits and ways of doing things that hurt performance in their new roles.

“Organizations pay a premium for workers with job experience that will allow them to just step in and start contributing immediately. But what employers don’t realize is that some of what their employees learned in previous jobs will end up being a negative,” said Steffanie Wilk, co-author of the study and associate professor of management and human resources at Ohio State University’s Fisher College of Business.

Wilk said that while employers have always assumed that it is good for new employees to have prior experience, previous research has not always found such a clear advantage.

And the new study is one of the first that has been able to explain why, by separating the positive and negative effects of prior employment experience on a current job.

Wilk and colleagues conducted the study with data from 771 employees and job applicants of two call centers for a major U.S. insurance firm.

They examined the employees’ job performance evaluations and separate ratings of the employees’ work-related skills and knowledge.

The researchers compared these performance and skills evaluations with the employees’ prior work histories and experience at the current firm, to find any relationships.

The results showed that prior work experience at other firms did lead to higher levels of skill and knowledge, which led to better performance reviews at the insurance company.

However, the researchers also found that the longer employees were with the insurance company, the less that experience from previous jobs helped with their performance.

According to the findings, the negative effects from previous experience lingered much longer.

And once the researchers took into account the higher levels of skill and knowledge brought from former jobs, previous experience actually led to lower performance at the insurance company.

In other words, the positive effects of knowledge and skill brought by experienced employees were being at least somewhat balanced by negative factors, the authors concluded.

The study appears in the current issue of the journal Organization Science. (ANI)

David Tennant’s comeback as Hamlet named ‘Theatre Event of the Year’

London, Feb 16 (ANI): Scottish actor David Tennant’s comeback to stage as Hamlet was named the event of the year at an award ceremony.

Nearly 35000 people took part in the Whatsonstage.com Theatregoers’ Choice wards, which saw Tennant’s return named ‘Theatre Event of the Year’.

Tennant had to pull out of the Royal Shakespeare Company performance due to back problems, but he returned to the stage after surgery.

Actor Kenneth Branagh walked away with the best actor award for Ivanov, while Katy Stephens won the best actress for ‘The Histories’.

Rain Man’s Josh Hartnett was named London newcomer of the year.

“Being on stage in the West End production of Rain Man was a thrilling new experience,” the BBC quoted Hartnett as saying, while accepting the award.

“Everyone worked incredibly hard, and made me feel welcome. I am thankful to the audiences for coming out and supporting us,” he added. (ANI)