In the year 1923, he emigrated to the United States of America and there he founded the Sikorsky Aircraft Corporation. This corporation is one of the biggest helicopter producing and designing firms. (Sras.org, 2013) Sergei Korolov

Sergei Korolov was a rocket designer and the supervisor of the Soviet Space program. And it was under his supervision that the first unmanned satellite, 'Sputnik' was launched in the space and the first man went in the orbit. (Sras.org, 2013)

Vladimir Petrovich Demikhov (1916 to 1998)

He was the founder of the field of organ transplants in animals. In the year 1937, he developed the first artificial heart. He performed first 'heart and lung transplant' in 1947 and the first liver transplant was performed by him in the year 1948. He also performed the first head transplant which led towards the world's first artificially created 'two headed dog' in the year 1955. (Sras.org, 2013)

Conclusion

Russia has contributed a lot to the current advanced...

Although, the current state of scientific research in Russia is not satisfactory but if proper policies and strategies are designed to solve the problems prevalent in the field of science then Russia can once again emerge as a major contributor to the field of science.
References

Potocnik, J. (2009) Women in Science. [e-book] Brussels: European Commision. p.86-89. http://ec.europa.eu/research/audio/women-in-science/pdf/wis_en.pdf [Accessed: 26 May 2013].

Lugsdin, E. (2013) Space Exploration -- the Contributions of Major Scientists. [e-book] Slovenia: j o z e f stefan institute. p.1-3. http://www-f1.ijs.si/~ramsak/ciolkowski.pdf [Accessed: 26 May 2013].

Russian Embassy in London (2013) Russian Science and Technology. [online] Available at: http://www.rusemblon.org/russianscience / [Accessed: 26 May 2013].

Sras.org (2013) Science in Russia and the Soviet Union. [online] Available at: http://www.sras.org/science_in_russia_and_the_soviet_union [Accessed: 26 May 2013].