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Untuk beberapa waktu yang akan datang
ekolimpiade.blogspot.com akan pidah ke pusatolimpiade.blogspot.com
Terimakasih

SBBS juara 1, 2 dan 3 di Science Week UNS

Dari tahun 2009, SMAN SBBS mengikuti kegiatan Science Week yang diselenggarakan oleh HIMA Fisika FKIP UNS. Dari tahun 2009 itu pula, SMAN SBBS meraih juara 1 hingga tahun 2012 ini. Di tahun ini, 3 siswa SMAN SBBS berhasil meraih juara 1, 2 dan 3. Juara 1 diraih oleh M Syamsul Arifin, Juara 2 diraih oleh Fathurrahman dan Juara 3 diraih oleh Bintang A.S.W.A.M.
Terimakasih atas segala dukungan dan doa dari semua pihak... dan Selalu Berjuanglah untuk masa depan yang lebih baik....

Miftau R. Taufik raih peringkat 1 Penyisihan Olimpiade Kimia

Hari Minggu, 16 September 2012. Miftau R. Taufik, siswa SMAN SBBS yang beberapa waktu yang lalu meraih medali Perak OSN 2012, mengikuti penyisihan Olimpiade Kimia yang diadakan oleh Himpunan Mahasiswa Jurusan Kimia Universitas Negeri Malang di Rayon Ngawi. 

Taufik bertarung sendiri dalam kegiatan tersebut, karena teman olimpiade kimia yang lain sedang mengikuti pelatihan olimpiade di Yogyakarta. Syukur, Alhamdulillah dari hasil kegiatan tersebut, Taufik meraih peringkat pertama dari 774 peserta se Jawa Timur & Bali terbuka.

Berjuanglah Taufik.... Semoga Sukses di Final nanti... 

Young Engineer Competition 2012 - Teknik Kimia UNDIP, SBBS raih juara 2 dan 3

Pada tanggal 9 September 2012, 2 team dari SMAN SBBS mengikuti Engineer Young Competition yang diadakan oleh HM FT Kimia UNDIP. Pada kegiatan tersebut diikuti oleh 15 team dari sekolah - sekolah yang berada di provinsi Jawa Tengah. Sempat menduduki peringkat 1, namun pada akhir babak dengan kondisi teknis yang kurang mendukung, akhirnya siswa - siswa SMAN SBBS hanya dapat meraih juara 2 dan 3.
Selamat kepada
Miftau Rahman Taufik
M Syamsul Arifin
Bintang A.S.W.A.M
Dheo Arrokhman Y. C
Dwi Smaradahana I
Afif Novian Sahar

Hasil OSN SMA 2012

Olimpiade Siswa Nasional XI tahun 2012 di Jakarta telah selesai dilaksanakan dan telah menghasilkan para pemenenang untuk tiap bidang yang di lombakan utk dapat melihat hasilnya silakan klik tautan dibawah:

 

1. Peraih Medali OSN XI 2012 tingkat SMA

2. Rekapitulasi Medali untuk tiap Jenjang pada OSN XI 2012

3. Rekapitulasi OSN XI 2012 Tingkat SMA per propinsi 

http://siswapsma.org/

SBBS Berjaya di OSN SMA 2012

 

Alhamdulillah SMAN SBBS pada tahun 2012 ini kembali berhasil menorehkan prestasi yang gemilang pada ajang OSN di Jakarta. Dengan total perolehan 13 medali yang terdiri dari 5 medali Emas, 5 medali Perak dan 3 medali Perunggu. 

Sejak tahun 2010, SMAN SBBS telah mengikuti OSN, walau baru berdiri pada tahun 2008, namun siswa - siswa SMAN SBBS berhasil membuktikan bahwa kemampuan siswa - siswa tersebut sungguh luar biasa.... Alhamdulillah tentunya...

Terbukti pada tahun 2012 ini, prestasi yang begitu gemilang kembali diukir oleh siswa - siswa SMAN SBBS. Kami ucapkan selamat kepada siswa- siswa tersebut dan Terimakasih kepada segenap civitas akademika SMAN SBBS...

Keep Spirit...

Siswa SBBS kembali Berjaya di Ajang International Physics Olympiad 43rd di Estonia

Alhamdulillah.. Luqman Fathurrohim, siswa SMAN SBBS berhasil meraih medali perunggu di Ajang Olimpiade Fisika tingkat Internasional (IPhO 43rd) di Estonia. Tahun 2011 lalu, Luqman juga meraih medali yang sama bersama satu rekan dari SMAN SBBS yaitu Farhan Nur Kholid di IPhO 42nd di Bangkok, Thailand. Semoga prestasi yang ia raih dapat memacu teman - teman sebayanya untuk berjuang keras meraih prestasi...

Tetap Semangat untuk SBBS!!!

Hasil OSN SMA 2012

Berikut ini adalah daftar nama peserta OSN SMA 2012 tingkat Nasional.
Selamat bagi siswa siswa SMAN Sragen Bilingual Boarding School. Go Get Gold!!!
Daftar Peserta OSN SMA 2012 dan Undangan

source : http://siswapsma.org/

Jawa Tengah Berjaya di OSN SMP

Prof. Suyanto, Ph.D berpose bersama para peraih medali emas, Selasa (3/7/2012). 

Pontianak (Dikdas): Provinsi Jawa Tengah kembali menunjukkan kedigdayaannya di ajang Olimpiade Sains Nasional jenjang Sekolah Menengah Pertama. Para delegasi provinsi di tengah Pulau Jawa ini membuktikan kepiawaiannya di empat lomba bidang sains; matematika, IPS, biologi, dan fisika. 

Jawa Tengah berhasil mengoleksi lima medali emas, 16 perak, dan 15 perunggu. Jawa Timur mengantongi lima emas, 11 perak, dan sembilan perunggu. Menyusul DKI Jakarta diurutan ketiga dengan lima emas, tiga perak, dan 11 perunggu. Jawa Barat dan Banten berturut-turut duduk di posisi keempat dan kelima. Dengan perolehan medali tersebut, Jawa Tengah berhak menyandang predikat juara umum jenjang SMP.

Perolehan Medali OSN 2012 jenjang SMP

Provinsi	Emas	Perak	Perunggu
Jawa Tengah	5	16	15
Jawa Timur	5	11	9
DKI Jakarta	5	3	11
Jawa Barat	2	2	10
Banten	2	-	2

Pada penyelenggaran OSN 2011 yang digelar di Manado, Sulawesi Utara, perolehan medali keseluruhan menunjukkan Jawa Tengah sebagai juara umum. Mereka mengantongi 21 emas, 29 perak, dam 29 perunggu. Disusul posisi berikutnya secara berturut-turut DKI Jakarta, Jawa Timur, Jawa Barat, dan Banten.

Perolehan Medali OSN 2011

Provinsi	Emas	Perak	Perunggu
Jawa Tengah	21	29	29
DKI Jakarta	20	32	34
Jawa Timur	11	22	30
Jawa Barat	6	13	17
Banten	4	12	15

Dengan keleksi medali sebanyak itu, Jawa Tengah berpeluang besar untuk kembali menjadi juara umum OSN 2012 dan memboyong piala bergilir Menteri Pendidikan dan Kebudayaan. Disusul empat provinsi lainnya yang kesemuanya berada di Pulau Jawa.* (Billy Antoro) 

http://dikdas.kemdiknas.go.id

Hasil OSN SMP 2012

Alhamdulillah SMPN Sragen Bilingual Boarding School berhasil meraih 2 medali pada ajang OSN 2012. Berikut adalah daftar perolehan medali SMPN SBBS.
Matematika, Medali Perak, diraih oleh Aji Luhur Bhakti Imanudin Firdaus
Fisika, Medali Perunggu, diraih oleh Tohari Catur Pamungkas

Semoga ditahun 2013, SMPN SBBS dapat menorehkan prestasi yang lebih baik lagi. Amin...

Doa untuk Siswa SBBS yang akan berjuang di OSN SMP....

Alhamdulillah...
3 Siswa SMPN SBBS sampai di Pontianak kemarin malam (28 Juni 2012)
Esok dan Lusa mereka akan mengikuti Ujian OSN SMP...
Kami mengharap DOA dari semuanya 
Semoga ALLAH SWT memberikan mereka Kemudahan dan Hasil yang terbaik dalam OSN 2012... Amin...

Kalender Pendidikan Tahun Pelajaran 2012/2013

Berikut adalah Kalender Pendidikan tahun Pelajaran 2012/2013
Semoga dapat bermanfaat...
Kalender Pendidikan 2012/2013

Discovery of Material With Amazing Properties

ScienceDaily (June 24, 2012) — Normally a material can be either magnetically or electrically polarized, but not both. Now researchers at the Niels Bohr Institute at the University of Copenhagen have studied a material that is simultaneously magnetically and electrically polarizable. This opens up new possibilities, for example, for sensors in technology of the future. The results have been published in the scientific journal, Nature Materials.

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The "8-armed candlestick" in this unusual image of the measurements is proof that the "walls" of the domains in TbFeO3 repel each other at certain temperatures and therefore lie at a fixed distance from each other. The signal from the "ordinary" chaotic domain walls would more resemble a fly swatter. (Credit: Niels Bohr Institute)

 

Materials that can be both magnetically and electrically polarized and also have additional properties are called multiferroics and were previously discovered by Russian researchers in the 1960s. But the technology to examine the materials did not exist at that time. It is only now, in recent years, that researchers have once again focused on analyzing the properties of such materials. Now you have research facilities that can analyze the materials down to the atomic level.
Surprising test results
"We have studied the rare, naturally occurring iron compound, TbFeO3, using powerful neutron radiation in a magnetic field. The temperature was cooled down to near absolute zero, minus 271 C. We were able to identify that the atoms in the material are arranged in a congruent lattice structure consisting of rows of the heavy metal terbium separated by iron and oxygen atoms. Such lattices are well known, but their magnetic domains are new. Normally, the magnetic domains lie a bit helter-skelter, but here we observed that they lay straight as an arrow with the same distance between them. We were completely stunned when we saw it," explains Kim Lefmann, Associate Professor at the Nano-Science Center, University of Copenhagen.
They were very strange and very beautiful measurements and it is just such a discovery that can awaken the researchers' intense interest. Why does it look like this?
Explaining physics
The experiments were conducted at the neutron research facility Helmholtz-Zentrum in Berlin in collaboration with researchers in Holland, Germany, at ESS in Lund and at Risø/DTU. They would like to get a general understanding of the material and with the help of calculations; and have now arrived at a more precise image of the relationship between the structure of the material and its physical properties.
"What the models are describing is that the terbium walls interact by exchanging waves of spin (magnetism), which is transferred through the magnetic iron lattice. The result is a Yukawa-like force, which is known from nuclear and particle physics. The material exhibits in a sense the same interacting forces that hold the particles together in atomic nuclei," explains Heloisa Bordallo, Associate Professor at the Niels Bohr Institute.
It is precisely this interaction between the transition metal, iron, and the rare element, terbium, that plays an important role in this magneto-electrical material. The terbium's waves of spin cause a significant increase in the electric polarization and the interaction between the ions of the elements creates one of the strongest magneto-electrical effects observed in materials.
"Through these results we found a new pathway to discover and develop new multiferroics," emphasize the researchers in the group. Now it is up to further research to determine whether this new effect could lead to new applications of these materials with the amazing physical properties.

---

Story Source:

The above story is reprinted from materials provided by University of Copenhagen, via EurekAlert!, a service of AAAS.
Note: Materials may be edited for content and length. For further information, please contact the source cited above.

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Journal Reference:

1. Sergey Artyukhin, Maxim Mostovoy, Niels Paduraru Jensen, Duc Le, Karel Prokes, Vinícius G. de Paula, Heloisa N. Bordallo, Andrey Maljuk, Sven Landsgesell, Hanjo Ryll, Bastian Klemke, Sebastian Paeckel, Klaus Kiefer, Kim Lefmann, Luise Theil Kuhn, Dimitri N. Argyriou. Solitonic lattice and Yukawa forces in the rare-earth orthoferrite TbFeO3. Nature Materials, 2012; DOI: 10.1038/nmat3358

Jawa Tengah Juara Umum Festival dan Lomba Seni Siswa Nasional (FLS2N) Tahun 2012

Untuk melihat dokumentasi Festival dan Lomba Seni Siswa Nasional (FLS2N) Tahun 2012 silahkan klik gambar di bawah ini.

 
http://pdkjateng.go.id/

Researchers Estimate Ice Content of Crater at Moon's South Pole

ScienceDaily  — NASA's Lunar Reconnaissance Orbiter (LRO) spacecraft has returned data that indicate ice may make up as much as 22 percent of the surface material in a crater located on the moon's south pole.

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Elevation (left) and shaded relief (right) image of Shackleton, a 21-km-diameter (12.5-mile-diameter) permanently shadowed crater adjacent to the lunar south pole. The structure of the crater's interior was revealed by a digital elevation model constructed from over 5 million elevation measurements from the Lunar Orbiter Laser Altimeter. (Credit: NASA/Zuber, M.T. et al., Nature, 2012)

The team of NASA and university scientists using laser light from LRO's laser altimeter examined the floor of Shackleton crater. They found the crater's floor is brighter than those of other nearby craters, which is consistent with the presence of small amounts of ice. This information will help researchers understand crater formation and study other uncharted areas of the moon. The findings are published in Thursday's edition of the journal Nature.
"The brightness measurements have been puzzling us since two summers ago," said Gregory Neumann of NASA's Goddard Space Flight Center in Greenbelt, Md., a co-author on the paper. "While the distribution of brightness was not exactly what we had expected, practically every measurement related to ice and other volatile compounds on the moon is surprising, given the cosmically cold temperatures inside its polar craters."
The spacecraft mapped Shackleton crater with unprecedented detail, using a laser to illuminate the crater's interior and measure its albedo or natural reflectance. The laser light measures to a depth comparable to its wavelength, or about a micron. That represents a millionth of a meter, or less than one ten-thousandth of an inch. The team also used the instrument to map the relief of the crater's terrain based on the time it took for laser light to bounce back from the moon's surface. The longer it took, the lower the terrain's elevation.
In addition to the possible evidence of ice, the group's map of Shackleton revealed a remarkably preserved crater that has remained relatively unscathed since its formation more than three billion years ago. The crater's floor is itself pocked with several small craters, which may have formed as part of the collision that created Shackleton.
The crater, named after the Antarctic explorer Ernest Shackleton, is two miles deep and more than 12 miles wide. Like several craters at the moon's south pole, the small tilt of the lunar spin axis means Shackleton crater's interior is permanently dark and therefore extremely cold.
"The crater's interior is extremely rugged," said Maria Zuber, the team's lead investigator from the Massachusetts Institute of Technology in Cambridge in Mass. "It would not be easy to crawl around in there."
While the crater's floor was relatively bright, Zuber and her colleagues observed that its walls were even brighter. The finding was at first puzzling. Scientists had thought that if ice were anywhere in a crater, it would be on the floor, where no direct sunlight penetrates. The upper walls of Shackleton crater are occasionally illuminated, which could evaporate any ice that accumulates. A theory offered by the team to explain the puzzle is that "moonquakes"-- seismic shaking brought on by meteorite impacts or gravitational tides from Earth -- may have caused Shackleton's walls to slough off older, darker soil, revealing newer, brighter soil underneath. Zuber's team's ultra-high-resolution map provides strong evidence for ice on both the crater's floor and walls.
"There may be multiple explanations for the observed brightness throughout the crater," said Zuber. "For example, newer material may be exposed along its walls, while ice may be mixed in with its floor."
The initial primary objective of LRO was to conduct investigations that prepare for future lunar exploration. Launched in June 2009, LRO completed its primary exploration mission and is now in its primary science mission. LRO was built and is managed by Goddard. This research was supported by NASA's Human Exploration and Operations Mission Directorate and Science Mission Directorate at the agency's headquarters in Washington.
For more information on LRO and the Lunar Orbiter Laser Altimeter, visit: http://lunar.gsfc.nasa.gov

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Story Source:

The above story is reprinted from materials provided by NASA.
Note: Materials may be edited for content and length. For further information, please contact the source cited above.

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Journal Reference:

1. Maria T. Zuber, James W. Head, David E. Smith, Gregory A. Neumann, Erwan Mazarico, Mark H. Torrence, Oded Aharonson, Alexander R. Tye, Caleb I. Fassett, Margaret A. Rosenburg, H. Jay Melosh. Constraints on the volatile distribution within Shackleton crater at the lunar south pole. Nature, 2012; 486 (7403): 378 DOI: 10.1038/nature11216 \

http://www.sciencedaily.com/releases/2012/06/120620141159.htm

Panduan dan Kisi-kisi OSTN Tingkat Jawa Tengah Tahun 2012

Silahkan lihat di sini untuk melihat Panduan dan Kisi-kisi OSTN Tingkat Jawa Tengah Tahun 2012.

http://pdkjateng.go.id/

Neutrons Escaping to a Parallel World?

ScienceDaily (June 15, 2012) — In a paper recently published in European Physical Journal (EPJ) C, researchers hypothesised the existence of mirror particles to explain the anomalous loss of neutrons observed experimentally. The existence of such mirror matter had been suggested in various scientific contexts some time ago, including the search for suitable dark matter candidates.

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Researchers hypothesize the existence of mirror particles to explain the anomalous loss of neutrons observed experimentally. (Credit: © Pix by Marti / Fotolia)

Theoretical physicists Zurab Berezhiani and Fabrizio Nesti from the University of l'Aquila, Italy, reanalysed the experimental data obtained by the research group of Anatoly Serebrov at the Institut Laue-Langevin, France. It showed that the loss rate of very slow free neutrons appeared to depend on the direction and strength of the magnetic field applied. This anomaly could not be explained by known physics.
Berezhiani believes it could be interpreted in the light of a hypothetical parallel world consisting of mirror particles. Each neutron would have the ability to transition into its invisible mirror twin, and back, oscillating from one world to the other. The probability of such a transition happening was predicted to be sensitive to the presence of magnetic fields, and could therefore be detected experimentally.
This neutron-mirror-neutron oscillation could occur within a timescale of a few seconds, according to the paper. The possibility of such a fast disappearance of neutrons -- much faster than the ten-minute long neutron decay -- albeit surprising, could not be excluded by existing experimental and astrophysical limits.
This interpretation is subject to the condition that the earth possesses a mirror magnetic field on the order of 0.1 Gauss. Such a field could be induced by mirror particles floating around in the galaxy as dark matter. Hypothetically, the earth could capture the mirror matter via some feeble interactions between ordinary particles and those from parallel worlds.

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Story Source:

The above story is reprinted from materials provided by Springer, via EurekAlert!, a service of AAAS.
Note: Materials may be edited for content and length. For further information, please contact the source cited above.

---

Journal Reference:

1. Zurab Berezhiani, Fabrizio Nesti. Magnetic anomaly in UCN trapping: signal for neutron oscillations to parallel world? The European Physical Journal C, 2012; 72 (4) DOI: 10.1140/epjc/s10052-012-1974-5

Undangan Pembinaan/Training Center Kontingen OSN SMP Jawa Tengah Tahun 2012

 

Untuk mengetahui isi undangan Pembinaan/Training Center Kontingen OSN SMP Jawa Tengah Tahun 2012 silahkan klik gambar di bawah ini.

 

http://pdkjateng.go.id/

Optical Displays from Water and Air

ScienceDaily (June 14, 2012) — For many years, scientists have been pursuing ways to mimic the perplexing capability of the lotus leaf to repel water. Lotus leaves hate water so much that droplets effortlessly roll off the surface, keeping it clean from dirt. Now an international team of researchers led by Aalto University have come up with an entirely new concept of writing and displaying information on surfaces using simply water. They exploit the unique way a trapped layer of air behaves on a lotus-inspired dual-structured water-repelling surface immersed under water.

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Water is applied to a surface but the surface does not get wet. (Credit: Image courtesy of Aalto University)

To achieve the extreme water-repellency of the lotus leaf, a surface needs to be superhydrophobic: it must have microscopic surface structures that prevent water from wetting the surface completely, leaving a thin layer of air between water and the surface. When such a surface is immersed in water, a trapped air layer covers the entire surface.
The researchers lead by Dr. Robin Ras at Aalto University in Finland, University of Cambridge and Nokia Research Center Cambridge fabricated a surface with structures in two size scales: microposts that have a size of ten micrometers and tiny nanofilaments that are grown on the posts. On such a two-level surface the air layer can exist in two different shapes (wetting states) that correspond to the two size scales. The researchers found that one can easily switch between the two states locally using a nozzle to create over- or underpressure in the water, in order to change the air layer to either state.
"The minimal energy needed to switch between the states means the system is bistable, which is the essential property of memory devices, for example," Academy Research Fellow Dr. Robin Ras points out. However, there is a feature that makes it all the more interesting: there is a striking optical contrast between the states due to a change in the roughness of the water-air interface. "Combined with the optical effect, the surface is also a bistable reflective display."
The switching only involves a change in the shape of the air layer − nothing happens to the solid surface itself. This is demonstrated by writing shapes on the surface underwater (making use of the contrast between the states) and taking the sample out of water: the surface emerges completely dry, and no traces of the writing remain.
The method for manipulating the air layer with the nozzle was developed by Tuukka Verho, graduate student in Aalto University. He was able to show that the reversible switching can be done with precision in a pixel-by-pixel fashion.
"This result represents the first step in making non-wettable surfaces a platform for storing or even processing information," says Academy professor Olli Ikkala. Until now, lotus-inspired surfaces have been mainly developed for applications like self-cleaning, anti-icing or flow drag reduction. This research is a landmark example how the Nature teaches materials scientists towards functional materials.
An article entitled "Reversible switching between superhydrophobic states on a hierarchically structured surface" is published in PNAS, Proceedings of the National Academy of Sciences of the USA, and provides more in depth information about this project.
Watch a video: http://www.youtube.com/watch?v=AEWPIjLbrSE

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Story Source:

The above story is reprinted from materials provided by Aalto University.
Note: Materials may be edited for content and length. For further information, please contact the source cited above.

---

Journal Reference:

1. T. Verho, J. T. Korhonen, L. Sainiemi, V. Jokinen, C. Bower, K. Franze, S. Franssila, P. Andrew, O. Ikkala, R. H. A. Ras. Reversible switching between superhydrophobic states on a hierarchically structured surface. Proceedings of the National Academy of Sciences, 2012; DOI: 10.1073/pnas.1204328109

Soal OSN SMP 2011 - Lengkap

Berikut ini adalah kumpulan soal - soal OSN SMP tahun 2011 yang meliputi bidang Matematika, Fisika, Biologi dan IPS. Soal - soal tersebut terdiri dari OSN di tingkat Kabupaten hingga Nasional. Semoga dapat bermanfaat. Terimakasih

Kumpulan Soal OSN SMP 2011

3 Siswa SMPN SBBS lolos menuju OSN tingkat Nasional

Alhamdulillah....

Sebelumnya kami ucapkan terimakasih atas doa dan dukungan segenap civitas akademika SMPN SBBS. Dengan segala daya upaya yang telah kita lalui, 3 siswa SMPN SBBS berhasil lolos menuju OSN tingkat Nasional yang akan diadakan di Pontianak, 28 Juni - 4 Juli 2012.

Kami tetap menharap doa serta dukungan untuk siswa - siswa tersebut hingga prestasi mereka tetap membanggakan di tingkat Nasional...

berikut adalah daftar nama siswa SMPN SBBS yang lolos :

1. AJI LUHUR B I F  (Matematika)

2. MAULANA WILDAN SEPUTRA (Biologi)

3. TOHARI CATUR PAMUNGKAS (Fisika)

PEMBERITAHUAN PESERTA OLIMPIADE SAINS NASIONAL (OSN) SMP

PEMBERITAHUAN 

PESERTA OLIMPIADE SAINS NASIONAL (OSN) SMP  

TINGKAT NASIONAL 

TAHUN 2012

Sebagai tindak lanjut dari seleksi Olimpiade Sains Nasional SMP Tingkat Provinsi yang diselenggarakan oleh Kementerian Pendidikan dan Kebudayaan pada tanggal, 2 Juni 2012, di setiap ibukota provinsi, maka berdasarkan Keputusan Direktur Pembinaan Sekolah Menengah Pertama (SMP),  Nomor 1370/C3/KP/2012, tanggal 12 Juni 2012, nama-nama sebagaimana tersebut di bawah ini adalah yang berhak mengikuti seleksi OSN Tingkat Nasional yang akan diselenggarakan tanggal 28 Juni sd. 4 Juli 2012 di Pontianak.

Pemberitahuan ini sekaligus sebagai undangan resmi, agar nama-nama yang tertera di dalam Daftar Peserta OSN SMP Tingkat Nasional Per Provinsi dapat segera menghubungi Dinas Pendidikan Provinsi masing-masing peserta. Biaya akomodasi dan konsumsi selama mengikuti kegiatan serta biaya transportasi dari ibukota provinsi asal peserta ke Pontianak pulang-pergi ditanggung Panitia Pusat.

► SK Penetapan Peserta Olimpiade Sains Nasional (OSN) Tingkat SMP Tahun 2012

► Daftar Peserta OSN SMP Tingkat Nasional per Provinsi Bidang Biologi

► Daftar Peserta OSN SMP Tingkat Nasional per Provinsi Bidang Ilmu Pengetahuan Sosial

► Daftar Peserta OSN SMP Tingkat Nasional per Provinsi Bidang Matematika 

► Daftar Peserta OSN SMP Tingkat Nasional per Provinsi Bidang Fisika  

http://dikdas.kemdiknas.go.id/content/newsletter/osn/pemberitahua-2-2-2.html

Lomba Menulis Cerita SD & SMP

NuSTAR to Drop from Plane and Rocket Into Space

ScienceDaily (June 11, 2012) — NASA's NuSTAR mission is scheduled to launch from Kwajalein Atoll in the central Pacific Ocean on June 13, no earlier than 8:30 a.m. PDT (11:30 a.m. EDT). The observatory, which will hunt for black holes and other exotic objects using specialized X-ray eyes, will be launched from a Pegasus XL rocket carried by an Orbital Science Corporation L-1011 "Stargazer" plane. The plane will take off from Kwajalein Atoll an hour before launch, flying out over the Pacific Ocean.

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The Orbital Science Corporation's "Stargazer" plane is shown releasing its Pegasus rocket. NASA's NuSTAR will also launch from a Pegasus carried by the Stargazer plane. (Credit: Orbital Sciences Corporation)

About five seconds before launch, the Pegasus XL rocket -- also from Orbital -- will drop from the plane, ignite and propel NuSTAR to space. A video showing a previous Pegasus launch is online at http://www.nasa.gov/multimedia/videogallery/index.html?media_id=128352201.
Why launch from the air? Plane-assisted launches are less expensive than those that take place from the ground. Less fuel is needed to boost cargo away from the pull of Earth's gravity. NuSTAR is part of NASA's Small Explorer program, which builds focused science missions at relatively low costs.
If all goes as planned, the following milestones will occur on June 13. Times listed are for a launch at the start of a four-hour window.
Takeoff
The Stargazer carrier aircraft, with the Pegasus launch vehicle and NuSTAR spacecraft strapped to its belly, will take off from Kwajalein's Bucholz Auxiliary Airfield an hour before launch, and climb to an altitude of about 39,000 feet (11,900 meters). This should occur around 7:30 a.m. PDT (10:30 a.m. EDT).
The Drop
The carrier aircraft will release the Pegasus rocket at 8:30 a.m. PDT (11:30 a.m. EDT). The rocket will free-fall for about five seconds before igniting.
Ignition
At about 8:30 a.m. PDT (11:30 a.m. EDT), the rocket carrying NuSTAR will ignite. Its first-stage motor will burn for 70 seconds and then drop away. The second-stage motor will burn for about a minute-and-a-half.
Splitting the Nose Cone
While the second stage is burning, pyrotechnic devices will be fired to release the nose cone, or fairing, that encapsulates the observatory. NuSTAR will be exposed to space for the first time. This event is scheduled to occur around 8:33 a.m. PDT (11:33 a.m. EDT).
Separating From the Rocket
At about 8:43 a.m. PDT (11:43 a.m. EDT), 13 minutes after the initial release from the Stargazer, NuSTAR will separate from the Pegasus rocket's third stage. At this point, NuSTAR will be in its final orbit -- a low-Earth equatorial orbit at an altitude of approximately 340 miles (600 kilometers) and an inclination of six degrees.
Phoning Home
When NuSTAR separates from the Pegasus, the satellite's system that controls its orientation in space, or "attitude," will begin to stabilize it, and the spacecraft solar arrays will be deployed. Around this time, its first signal will be received on the ground via NASA's Tracking and Data Relay Satellite System. Over the following week, NuSTAR personnel will perform a series of checkouts to ensure that all spacecraft subsystems are operating nominally.
Deploying the Boom
Roughly one week after launch, engineers will command NuSTAR to deploy its lengthy 33-foot (10-meter) boom, allowing the telescope to focus X-ray light into crisp images. Unlike visible-light telescopes, X-ray telescopes require a long distance between the mirrors and detectors to focus the light. It's a bit like wearing glasses a few feet away from your face.
Science operations are expected to begin about 30 days after launch.
On launch day, live commentary and coverage will be broadcast online beginning at 7 a.m. PDT (10 a.m. EDT) at http://www.nasa.gov/nustar and at http://www.ustream.tv/nasajpl2 .
NuSTAR is a Small Explorer mission led by the California Institute of Technology in Pasadena and managed by NASA's Jet Propulsion Laboratory, also in Pasadena, for NASA's Science Mission Directorate in Washington. The spacecraft was built by Orbital Sciences Corporation, Dulles, Va. Its instrument was built by a consortium including Caltech; JPL; the University of California, Berkeley; Columbia University, New York; NASA's Goddard Space Flight Center, Greenbelt, Md.; the Danish Technical University in Denmark; Lawrence Livermore National Laboratory, Livermore, Calif.; and ATK Aerospace Systems, Goleta, Calif. NuSTAR will be operated by UC Berkeley, with the Italian Space Agency providing its equatorial ground station located at Malindi, Kenya. The mission's outreach program is based at Sonoma State University, Rohnert Park, Calif. NASA's Explorer Program is managed by Goddard. JPL is managed by Caltech for NASA.
Launch management and government oversight for the mission is the responsibility of NASA's Launch Services Program at the Kennedy Space Center in Florida.
For more information, visit http://www.nasa.gov/nustar and http://www.nustar.caltech.edu/ .

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Story Source:
The above story is reprinted from materials provided by NASA/Jet Propulsion Laboratory.


http://www.sciencedaily.com/releases/2012/06/120611195728.htm

Undangan Peserta Festival dan Lomba Seni Siswa Nasional (FLS2N) Tahun 2012

Klik gambar di bawah ini untuk mengetahui isi dari Undangan Peserta Festival dan Lomba Seni Siswa Nasional (FLS2N) Tahun 2012.

 

 

 

 

http://pdkjateng.go.id/

Pengumuman Tenaga Honorer Kategori I yang Memenuhi Kriteria

Menindaklanjuti Surat Edaran Menteri Pendayagunaan Aparatur Negara dan Reformasi Birokrasi Nomor 03 Tahun 2012 tentang Data Tenaga Honorer Kategori I dan Daftar nama Tenaga Honorer Kategori II, dengan ini kami umumkan nama-nama Tenaga Honorer Kategori I yang Memenuhi Kriteria di lingkungan Kementerian Pendidikan dan Kebudayaan hasil verifikasi Tim BKN dan BPKP sebagaimana daftar terlampir.

 

Untuk proses selanjutnya terkait waktu dan persyaratan penyampaian berkas usulan pengangkatan CPNS, akan diinformasikan lebih lanjut.

Demikian pengumuman ini disampaikan, atas perhatiannya diucapkan terima kasih.

 

Lampiran:

• Surat Pengumuman
• Daftar Tenaga Honorer
• Daftar Tenaga Honorer Kebudayaan 

http://kemdiknas.go.id/kemdikbud/pengumuman/354

Mendikbud: Tanamkan Karakter Konsisten kepada Anak-anak

Jakarta – Menteri Pendidikan dan Kebudayaan (Mendikbud) Mohammad Nuh mengatakan, perlu menanamkan karakter konsisten kepada anak bangsa. Hal tersebut  merupakan inspirasi dari buku biografi mantan Menteri Pendidikan Nasional, Yahya Muhaimin.  “Jadi segala sesuatu kalau konsisten itu ibarat batu yang ditetesi terus meskipun itu tetesan kecil, akan sangat berpengaruh,” katanya.

Peluncuran buku yang berjudul “Tiga Kota Satu Pengabdian” itu berlangsung cukup meriah di Gedung A Kemdikbud, Jakarta, (12/6). Acara dibuka dengan tarian Saman dari Aceh. Kemudian selain dihadiri Mendikbud M. Nuh, acara peluncuran juga dihadiri beberapa tokoh nasional, di antaranya Amien Rais, Akbar Tandjung, dan Adhyaksa Dault. Buku biografi Yahya Muhaimin, “Tiga Kota Satu Pengabdian”, ditulis Badruzzaman Busyairi, seorang penulis kelahiran Brebes, Jawa Tengah.

Menteri Nuh mengatakan, ia sudah cukup lama mengenal Yahya Muhaimin. Ia mengenalnya sebagai seorang guru besar, birokrat, intelektual, dan seseorang yang sangat santun dalam menyampaikan pandangan dan pendapat. Menteri Nuh juga mengaku banyak bertanya dengan mantan Mendiknas era Presiden Abdurrahman Wahid itu mengenai kementerian pendidikan, “Dan beliau dengan senang hati menjawab,” ujarnya.

Buku “Tiga Kota Satu Pengabdian” mengupas perjalanan hidup Yahya Muhaimin di tiga kota, yaitu Bumiayu, Yogyakarta, dan Jakarta. Dalam buku ini pembaca diajak memahami tiga dimensi perjalanan hidupnya, yaitu perjalanan akademis, perjalanan keterlibatannya di lembaga sosial keagamaan dan persinggungan dengan dunia politik, dan perjalanan persahabatannya dengan tokoh besar negeri ini, di antaranya Abdurrahman Wahid dan Amien Rais. (DM)

http://kemdiknas.go.id/kemdikbud/berita/393

17 Siswa Berkebutuhan Khusus Ikut SNMPTN di UNJ

Jakarta --- Sebanyak 17 siswa berkebutuhan khusus ikut melaksanakan Seleksi Nasional Masuk Perguruan Tinggi Negeri (SNMPTN) di Universitas Negeri Jakarta, Selasa (12/06). Para peserta SNMPTN yang berasal dari pendidikan khusus dan layanan khusus (PKLK) ini dibantu oleh dua orang pengawas dalam mengerjakan soal-soal SNMPTN.

“Yang ikut (SNMPTN) disini ada tuna daksa, tuna netra, dan tuna rungu. Semuanya harus diberi layanan,” tutur Menteri Pendidikan dan Kebudayaan, Mohammad Nuh, usai menyemangati siswa PKLK tersebut.

Dari 17 orang yang seharusnya mengikuti ujian, baru 15 orang yang telah siap mengerjakan soal saat waktu tanda ujian dibunyikan. “Dua lagi belum hadir,” kata Mendikbud.

Mendikbud mengatakan, PKLK akan diperkuat hingga ke pendidikan tinggi. Rencana tersebut telah dituangkan dalam rancangan undangan-undang pendidikan tinggi. “Di perguruan tinggi harus menyiapkan pendidikan untuk anak-anak berkebutuhan khusus, selama ini kan baru sampai sekolah menengah,” katanya.

Peningkatan layanan khusus bagi anak berkebutuhan khusus akan dilakukan baik terhadap siswa yang kebutuhannya mengikat maupun yang temporer (dalam masa sakit). Dalam SNMPTN kali ini, tingkat kesulitan soal bagi siswa berkebutuhan khusus setara dengan siswa reguler. Hanya dalam pelaksanaannya, siswa berkebutuhan khusus diberi tambahan waktu 30 menit. (AR)

http://kemdiknas.go.id/kemdikbud/berita/392

Kuota Penerimaan SNMPTN Naik 10 Persen

Jakarta --- Panitia Seleksi Nasional Masuk Perguruan Tinggi Negeri (SNMPTN) 2012 menyiapkan kurang lebih 15-16 ribu kursi tambahan bagi calon mahasiswa baru angkatan 2012. Berarti ada kenaikan 10 persen dari kuota awal penerimaan 164.697 kursi. 

 “Prinsipnya secara nasional sepuluh persen, tapi teknisnya ada di PTN,” kata Menteri Pendidikan dan Kebudayaan Mohammad Nuh dalam konferensi pers di kantornya, Jakarta Senin (11/06).

Mendikbud mengatakan, setiap PTN memiliki pertimbangan untuk menentukan program studi mana yang harus ditambah. “Bisa jadi ada PTN yang menambah sembilan persen, namun di PTN lain sebelas persen”, katanya.

Ada dua pertimbangan yang mendukung pengambilan kebijakan ini. Pertama, infrastruktur PTN yang memungkinkan untuk menambah kuota. Kedua, perbaikan dalam rasio jumlah mahasiswa terhadap jumlah dosennya. “Kami berani menambah sepuluh persen, karena masih ada ruang pengoptimalan volume dan kualitas infrastruktur dan dosen,” katanya.

Kebijakan untuk menaikkan kuota sepuluh persen diambil dengan mempertimbangkan kenaikan jumlah pendaftar yang mencapai 14 persen. Meskipun penambahan kursi tidak sebanyak kenaikan jumlah pendaftar, namun dengan adanya penambahan ini akan memperluas kesempatan calon mahasiswa baru untuk sekolah di PTN pilihannya. (AR)

http://kemdiknas.go.id/kemdikbud/berita/387

Masyarakat Dihimbau Tak Tertipu Calo SNMPTN

Jakarta --- Seleksi Nasional Masuk Perguruan Tinggi Negeri (SNMPTN) jalur tulis akan dilaksanakan selama dua hari, 12-13 Juni 2012. Untuk mengantisipasi adanya usaha percaloan yang dilakukan secara tidak bertanggung jawab oleh pihak-pihak tertentu, ketua SNMPTN, Akhma Loka, mengimbau masyarakat untuk lebih rasional dan lebih berhati-hati dengan rayuan dan bujukan pihak-pihak tertentu untuk memberikan imbalan jika mereka nanti dinyatakan lulus.  “Mereka tidak melakukan apapun untuk kelulusan Anda, jadi jangan tertipu!,” ujar Akhma Loka, di Kantor Kementerian Pendidikan dan Kebudayaan, Senin (11/06).

Dia menggambarkan, jika ada seratus orang yang diyakinkan pelaku bahwa nomor ujian mereka akan muncul pada saat kelulusan, dan setidaknya ada dua nomor ujian yang benar dinyatakan lulus, maka akan sangat merugikan masyarakat. Pasalnya, ada pihak yang memberikan imbalan atas apa yang tidak dilakukan calo tersebut.

Akhma Loka juga mengimbau agar peserta SNMPTN yang akan melaksanakan ujian besok pagi, dapat melihat lokasi ujian sehari sebelum pelaksanaan. “Jangan sampai ketika datang besok, mereka kebingungan di mana lokasinya,” tuturnya.

Demikian pula untuk kelengkapan ujian seperti alat tulis dan tanda peserta harap dibawa. Untuk peserta yang memilih jurusan seni dan olah raga, diimbau untuk teliti melihat lokasi dan kelengkapan dalam ujian keterampilan yang akan dilaksanakan tanggal 14-15 Juni mendatang. (AR)

http://kemdiknas.go.id/kemdikbud/berita/388

Perguruan Tinggi Negeri Dilarang Naikkan Biaya Pendidikan

Jakarta --- Menteri Pendidikan dan Kebudayaan Mohammad Nuh melarang perguruan tinggi negeri (PTN) menaikkan biaya pendidikan yang berasal dari mahasiswa. “Tidak ada kenaikan SPP (sumbangan pembinaan pendidikan), karena sudah dapat bantuan operasional perguruan tinggi negeri,” katanya seusai melakukan inspeksi mendadak di hari pertama Seleksi Nasional Masuk Perguruan Tinggi Negeri (SNMPTN) di Universitas Negeri Jakarta (UNJ), Selasa (12/06).

Mendikbud menjelaskan, saat ini pemerintah menerapkan sistem insentif dan disinsentif bagi semua PTN. Jika sumber dana sebuah PTN berasal dari masyarakat, maka secara otomatis penerimaan yang berasal dari pemerintah akan dikurangi. Namun jika pendanaannya didapat dari kerja sama dengan industri dan penelitian, maka pemerintah akan memberi insentif tambahan.  “Tambahannya disesuaikan dengan koefisien proporsionalitasnya,” kata Mendikbud.

Untuk itu, selain memberi bantuan operasional kepada perguruan tinggi negeri, Mendikbud menyampaikan akan terus mendorong tumbuhnya kerja sama antara PTN dengan industri. “Jangan sekali-sekali menaikkan dari sisi masyarakat, karena akan diberi disinsentif,” tegasnya. (AR)

http://kemdiknas.go.id/kemdikbud/berita/391

KPM EXPO 7th - UNJ

Physics Lecture - 2 - Acceleration

Berikut adalah video pembelajaran tentang percepatan. Silahkan diunduh dan selamat belajar
Physics Lecture - 2 - Acceleration

Humanoid Soccer Championship 2012

ScienceDaily (June 11, 2012) — In a number of recent Hollywood hit films, robots do all kinds of spectacular things, from battling it out in boxing rings to saving the world from alien invaders. Seagate Technology is helping university students in Thailand bring those futuristic visions a little closer to reality.

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In the Thailand Humanoid Robot Soccer Championship students designed their own soccer-playing machines. (Credit: Image courtesy of ResearchSEA)

 

Seagate supported the Thailand Humanoid Robot Soccer Championship, in which students designed their own soccer-playing machines. Hanuman Team from King Mongkut's University of Technology Thonburi (KMUTT) emerged as champions of this year's competition. The team won a cash prize of 200,000 baht and will represent Thailand at the World Robocup Soccer Humanoid League 2013 in Osaka, Japan, next year. Thanyaburi Tonkla Team from Rajamangala University of Technology Thanyaburi (RMUTT) 100,000 baht as the first runners-up.

Thailand's Humanoid Robot Soccer Championship 2012 was jointly organized by Seagate Technology (Thailand) Limited, the Thai Robotics Society (TRS), FIBO of King Mongkut's University of Technology Thonburi and the National Electronics and Computer Technology Center (NECTEC). This year saw 11 teams from 8 universities battling for the chance to represent Thailand in the World Robocup Soccer Humanoid League 2013.

"TRS is confident that these competitions foster hands-on technical learning and collaboration -- which are key qualities for success in our digital world," said Dr. Thavida Maneewan, president of the Thai Robotics Society. "Students exchange ideas and valuable experiences with one another, which ultimately benefits them and our society."

"NECTEC is pleased to support Thai university students in using knowledge gained from their classrooms and applying it in a creative competition such as this one," added Dr. Pansak Siriruchtapong, executive director of National Electronics and Computer Technology Center(NECTEC) "We hope that the Humanoid Robot Soccer contest will also emphasize the importance of technology in helping further our country's innovation and economic future."

"We hope that the Humanoid Robot Soccer contest will also emphasize the importance of technology to enhance their learning and skills development and increase innovation capability for young Thai people."

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Story Source:

The above story is reprinted from materials provided by ResearchSEA, via ResearchSEA.

Quantum Computers Move Closer to Reality, Thanks to Highly Enriched and Highly Purified Silicon

ScienceDaily  — The quantum computer is a futuristic machine that could operate at speeds even more mind-boggling than the world's fastest super-computers.

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SFU physicist Mike Thewalt and grad student Kamyar Saeedi with a sample of highly isotopically enriched silicon - its unique properties could advance quantum computing. (Credit: Image courtesy of Simon Fraser University)

Research involving physicist Mike Thewalt of Simon Fraser University offers a new step towards making quantum computing a reality, through the unique properties of highly enriched and highly purified silicon.

Quantum computers right now exist pretty much in physicists' concepts, and theoretical research. There are some basic quantum computers in existence, but nobody yet can build a truly practical one -- or really knows how.

Such computers will harness the powers of atoms and sub-atomic particles (ions, photons, electrons) to perform memory and processing tasks, thanks to strange sub-atomic properties.

What Thewalt and colleagues at Oxford University and in Germany have found is that their special silicon allows processes to take place and be observed in a solid state that scientists used to think required a near-perfect vacuum.

And, using this ²⁸Si they have extended to three minutes -- from a matter of seconds -- the time in which scientists can manipulate, observe and measure the processes.

"It's by far a record in solid-state systems," Thewalt says. "If you'd asked people a few years ago if this was possible, they'd have said no. It opens new ways of using solid-state semi-conductors such as silicon as a base for quantum computing.

"You can start to do things that people thought you could only do in a vacuum. What we have found, and what wasn't anticipated, are the sharp spectral lines (optical qualities) in the 28Silicon we have been testing. It's so pure, and so perfect. There's no other material like it."

But the world is still a long way from practical quantum computers, he notes.

Quantum computing is a concept that challenges everything we know or understand about today's computers.

Your desktop or laptop computer processes "bits" of information. The bit is a fundamental unit of information, seen by your computer has having a value of either "1" or "0."

That last paragraph, when written in Word, contains 181 characters including spaces. In your home computer, that simple paragraph is processed as a string of some 1,448 "1"s and "0"s.

But in the quantum computer, the "quantum bit" (also known as a "qubit") can be both a "1" and a "0" -- and all values between 0 and 1 -- at the same time.

Says Thewalt: "A classical 1/0 bit can be thought of as a person being either at the North or South Pole, whereas a qubit can be anywhere on the surface of the globe -- its actual state is described by two parameters similar to latitude and longitude."

Make a practical quantum computer with enough qubits available and it could complete in minutes calculations that would take today's super-computers years, and your laptop perhaps millions of years.

The work by Thewalt and his fellow researchers opens up yet another avenue of research and application that may, in time, lead to practical breakthroughs in quantum computing.

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Journal Reference:

1. M. Steger, K. Saeedi, M. L. W. Thewalt, J. J. L. Morton, H. Riemann, N. V. Abrosimov, P. Becker, H.- J. Pohl.Quantum Information Storage for over 180 s Using Donor Spins in a ²⁸Si 'Semiconductor Vacuum'.Science, 2012; 336 (6086): 1280 DOI:10.1126/science.1217635

BNI46 Journalist Writing & Photo Competition

Physics Lecture 1 - Introduction to Physics

Materi Pembelajaran Fisika dalam Bahasa Inggris yang disampaikan oleh B Roberts. Selamat Balajar...
Physics Lecture 1 - Introduction to Physics

SPARE 8

Lomba Karya Ilmiah Inovatif Pembelajaran Guru SMA dan SMK

Klik tulisan di bawah ini untuk mengetahui informasi tentang  

"Lomba Karya Ilmiah Inovatif Pembelajaran Guru SMA dan SMK."

Cassini Plasma Spectrometer Turns Off

ScienceDaily — The Cassini plasma spectrometer instrument (CAPS) aboard NASA's Cassini spacecraft was turned off between Friday, June 1 and Saturday, June 2, when a circuit breaker tripped off after the instrument experienced some unexpected voltage shifts.

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Artist concept of Cassini spacecraft. Image credit: NASA/JPL Artist concept of Cassini spacecraft. (Credit: NASA/JPL)

 

Engineers are currently investigating this issue, which they believe is due to short circuits in the instrument. In June 2011, the instrument was turned off because of similar problems, but was switched on again in March 2012 once investigators determined that tin plating on electronic components had grown "whiskers" large enough to contact another conducting surface and carry electrical current, resulting in a voltage shift. At that time, it was believed that these "whiskers" were not capable of carrying sufficient current to cause any damage, and the voltage shifts didn't have any effect on normal spacecraft operations because the power subsystem is designed to operate in the presence of such shifts.
More details about whiskers on the CAPS instrument can be found here: http://www.jpl.nasa.gov/news/news.cfm?release=2012-078 .
The cause is still under investigation, but engineers will be looking into this issue over the next few months.
Cassini launched in 1997 and has been exploring the Saturn system since 2004. The project completed its original prime mission in 2008 and has been extended twice. Cassini is now in its solstice mission, which will enable scientists to observe seasonal change in the Saturn system through the northern summer solstice.??
The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington.
For more information about the Cassini mission, visit: http://www.nasa.gov/cassini and http://saturn.jpl.nasa.gov .

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Story Source:
The above story is reprinted from materials provided by NASA/Jet Propulsion Laboratory.

Splitting the Unsplittable: Physicists Split an Atom Using Quantum Mechanics Precision

ScienceDaily  — Researchers from the University of Bonn have just shown how a single atom can be split into its two halves, pulled apart and put back together again. While the word "atom" literally means "indivisible," the laws of quantum mechanics allow dividing atoms -- similarly to light rays -- and reuniting them. The researchers want to build quantum mechanics bridges by letting the atom touch adjacent atoms while it is being pulled apart so that it works like a bridge span between two pillars.

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Maximilian Genske, Noomen Belmechri, Andreas Steffen and Dr. Andrea Alberti working. (Credit: Copyright Barbara Frommann/Uni Bonn)

 

The results have just been published in the journal Proceedings of the National Academy of Sciences.
Dividing atoms? What sounds like nuclear fission and radioactivity is, however, a precision process using quantum mechanics. The laws of quantum mechanics allow objects to exist in several states simultaneously. This is what the so-called double-slit experiment is based on, where a particle can go through two slits at the same time. The Bonn scientists working with Prof. Dr. Dieter Meschede from the Institute for Applied Physics of the University of Bonn succeeded in keeping a single atom simultaneously in two places that were more than ten micrometers, or one hundredth of a millimeter, apart. This is an enormous distance for an atom. Afterwards, the atom was put back together undamaged.
The atom has a split personality
The fragile quantum effects can only occur at the lowest temperatures and with careful handling. One method is cooling a cesium atom enormously using lasers -- to a temperature of a tenth of a million above absolute zero -- and then holding it with another laser. This laser beam is key to splitting the atom. It works because atoms have a spin that can go in two directions. Depending on the direction, the atom can be moved to the right or the left by the laser like on a conveyor. Key is that the atom's spin can be in both directions simultaneously. So, if the atom is moved to the right and left at the same time, it will split. "The atom has kind of a split personality, half of it is to the right, and half to the left, and yet, it is still whole," explained Andreas Steffen, the publication's lead author.
The parts compare their "experiences"
But you cannot see the split directly; if you shine a light on the atom to take a picture, the split will collapse immediately. The atom can then be seen in several images; sometimes on the left, sometimes on the right -- but never in both places. And yet, the split can be proved successfully by putting the atom back together. Thus an interferometer can be built from individual atoms that can, e.g., be used to measure external impacts precisely. Here, the atoms are split, moved apart and joined again. What will become visible, e.g., are differences between the magnetic fields of the two positions or accelerations since they become imprinted in the quantum mechanical state of the atom. This principle has already been used to very precisely survey forces such as Earth's acceleration.
Quantum systems as tools?
The Bonn scientists, however, are looking for something else: simulating complex quantum systems. Many physicists have been hoping for a long time to be able to simulate so-called topological isolators or plant photosynthesis -- phenomena that are hard to capture with modern super computers -- using small quantum systems. The first steps on the way to such simulators could consist of modeling the movement of electrons in solid bodies, thus gaining insights for innovative electronic devices. Examples for this are Dirac motion of electrons in a single graph-layer or the emergence of artificial molecules from interacting particles. But for this purpose, individual atoms would not only have to be well controlled, but also linked according to quantum mechanical laws since where the crux of the matter lies is exactly in a structure made up from many quantum objects.
A cog in a gearbox
"For us, an atom is a well-controlled and oiled cog," said Dr. Andrea Alberti, the team lead for the Bonn experiment. "You can build a calculator with remarkable performance using these cogs, but in order for it to work, they have to engage." This is where the actual significance of splitting atoms lies: Because the two halves are put back together again, they can make contact with adjacent atoms to their left and right and then share it. This allows a small network of atoms to form that can be used -- like in the memory of a computer -- to simulate and control real systems, which would make their secrets more accessible. The scientists believe that the entire potential of controlling individual atoms this precisely will become apparent over time.

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Journal Reference:

1. A. Steffen, A. Alberti, W. Alt, N. Belmechri, S. Hild, M. Karski, A. Widera, D. Meschede. Digital atom interferometer with single particle control on a discretized space-time geometry. Proceedings of the National Academy of Sciences, 2012; DOI: 10.1073/pnas.1204285109