Washington, September 18 : An engineer, at the Iowa State University in the US, along with his colleagues, is studying engines in an effort to reduce emissions and improve their efficiency.

The engineer in question is Song-Charng Kong, an Iowa State assistant professor of mechanical engineering.

With the help of 15 graduate students and all kinds of sensors recording engine cylinder pressure, energy release and exhaust emissions, is looking for cleaning and improving engine performance.

“There is still a lot of work to be done to improve engine performance,” Kong said. “All of this work will lead to incremental improvements,” he added.

Kong and his students are working on a lot of combustion projects in the lab.

Islamabad - Pakistan on Thursday denied that the United States forewarned it of the overnight missile strike in its north-west tribal region that was carried out hours after US assurances of enhanced coordination on critical security issues.

"No Sir! We were not informed," Pakistan's Foreign Minister Shah Mahmood Qureshi told journalists in Islamabad a day after the US aerial attack killed six suspected Taliban militants in Baghar Cheena village of South Waziristan tribal district.

Wednesday's strike came shortly after Admiral Mike Mullen, chairman of the US Joint Chiefs of Staff Committee, met Pakistani leadership during his unannounced visit and reaffirmed "the US commitment to respect Pakistan's sovereignty."

Washington, September 18: Radiations emitting from mobile phones can distort measurements taken via the latest measuring systems, even when their individual components have passed the standardized Electromagnetic Compatibility Test (EMC).

Researchers at the Physikalisch-Technische Bundesanstalt (PTB) say that this is the reason why the verification of vehicle scales that are used to weigh trains, lorries or cars are rejected by the concerned authorities in certain cases.

Washington, September 18: A new study has determined that the Viking warriors were driven to seek their fortunes to better their chances of finding wives, which suggests that there was a shortage of Scandinavian women due to female infanticides during the Viking Age.

According to a report in Discovery News, James Barrett, deputy director of Cambridge University’s McDonald Institute for Archaeological Research, has conducted the study.

Barrett said that it was the selective killing of female newborns that led to a shortage of Scandinavian women in the first place, resulting later in intense competition over eligible women.

Washington, Sept 18 Michelle Obama, wife of Democratic presidential hopeful Barack Obama, has been immortalized by an American artist, who has created a bare-chested sculpture of the 44-year-old lawyer.

The work, by controversial sculptor Daniel Edwards, shows Michelle in the style of an African Queen, wearing large hooped earrings and an "afro pick" comb in her Egyptian-influenced hairstyle.

Islamabad, Sept 18 : Pakistan Foreign Minister Shah Mahmood Qureshi has said that the US didn’t inform Pakistan about today’s fresh attack inside Pakistan’s territory.

All countries should respect each other sovereignty. The cross border violations will not benefit US on long-term basis, The News quoted Quereshi as saying.

During talks with Pakistan Army Chief Ashfaq Kayani on Tuesday, top US defence man Admiral Michael Mullen had assured us that Pakistan’s sovereignty would be respected.

However, US launched a fresh attack inside Pakistan today.