Friday, 24 May 2013

Mengenal Lembaga Riset Terbesar di Dunia VI

Badan Penelitian dan Pengembangan Pertanian


 


Sejak didirikan pada tahun 1974, Badan Litbang Pertanian telah mengalami banyak perubahan, baik dari sisi organisasi maupun kepemimpinan. Penambahan maupun pengurangan Unit Kerja (UK) maupun Unit Pelaksana Teknis (UPT) beberapa kali dilakukan. Pimpinan Badan Litbang Pertanian datang dan pergi silih berganti, begitu pula program dan kebijakan strategisnya sebagai tuntutan dari dinamika lingkungan strategis sektor pertanian. 

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Information and Library Network Centre
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496
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56
80
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Lunar and Planetary Institute
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108
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Commissariat a l'√čnergie Atomique
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Institut National de l'Environnement Industriel et des Risques
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903
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European Bioinformatics Institute EMBL
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National Radio Astronomy Observatory
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Instituto de Salud Carlos III
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Transportation Research Board
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365
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National Central Library
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86
61
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Los Alamos National Laboratory
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US National Science Foundation
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International Research Center for Japanese Studies
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(1) Indonesian Agency for Agricultural Research and Development
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Joint Institute for Nuclear Research
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National Research Council Canada
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Indonesia Bisa!

Amin.

Ucapan Terima Kasih:

Bpk. Dr. Miftahul Hadi, M.Sc.
[Peneliti Fisika di LIPI dan Founder Institute for Theoretical Physics and Mathematics]

Bpk. Dr. Teddy Lesmana, S.E., M.M.

[Peneliti Ekonomi di LIPI]

Bersambung.

Semoga Bermanfaat

Defense Space Security


Prototipe Helikopter Masa Depan Buatan seseorang warga Indonesia bernama Ridwan Chandra Choa yang pernah bekerja sebagai seniman digital Lucasfilm Animation di Singapura.

Hypersonic Speed: The Warp Speed of Today 

In aerodynamics, a hypersonic speed is one that is highly supersonic (even though the origin of the words is the same: "super" is just the Latin version of the Greek "hyper"). Since the 1970s, the term has generally been assumed to refer to speeds of Mach 5 and above.
The precise Mach number at which a craft can be said to be flying at hypersonic speed varies, since individual physical changes in the airflow (like molecular dissociation and ionization) occur at different speeds; these effects collectively become important around Mach 5. The hypersonic regime is often alternatively defined as speeds where ramjets do not produce net thrust.


Experience Boeing 



While the definition of hypersonic flow can be quite vague and is generally debatable (especially due to the lack of discontinuity between supersonic and hypersonic flows), a hypersonic flow may be characterized by certain physical phenomena that can no longer be analytically discounted as in supersonic flow. The peculiarity in hypersonic flows are as follows:
  1. Shock layer
  2. Aerodynamic heating
  3. Entropy layer
  4. Real gas effects
  5. Low density effects
  6. Independence of aerodynamic coefficients with Mach number.



The X-43 is an unmanned experimental hypersonic aircraft with multiple planned scale variations meant to test various aspects of hypersonic flight. It was part of NASA's Hyper-X program and has set several airspeed records for jet-propelled aircraft. The X-43 is the fastest aircraft on record at approx. 7000 miles per hour (10,461 km/h).

A winged booster rocket with the X-43 placed on top, called a "stack", is drop launched from a larger carrier plane. After the booster rocket (a modified first stage of the Pegasus rocket) brings the stack to the target speed and altitude, it is discarded, and the X-43 flies free using its own engine, a scramjet.

Sources:

1. Wikipedia
2. Boeing Corporation
3. NASA