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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.

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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.

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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.

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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