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Teori String

Pendahuluan

Pada awal abad ke-20, atom – diyakini sebagai materi penyusun terkecil – terdiri dari komponen yang lebih kecil yang disebut proton, neutron dan elektron, yang dikenal sebagai partikel subatomik. Pada awal 1960-an, partikel subatomik lain ditemukan. Pada 1970-an, ditemukan bahwa proton dan neutron (dan hadron lainnya) terdiri dari partikel yang lebih kecil yang disebut quark. Teori kuantum menggambarkan interaksi partikel ini.

Pada 1980-an, model matematika baru dari teori fisika yang disebut teori string muncul. Teori ini menunjukkan bahwa semua partikel, dan semua bentuk energi di alam semesta, dibangun oleh “string” satu dimensi, materi penyusun yang sangat kecil dan hanya memiliki dimensi panjang saja, tidak mempunyai dimensi tinggi maupun dimensi lebar. Selanjutnya, teori string menyarankan bahwa alam semesta terdiri dari beberapa dimensi. Tinggi, lebar, dan panjang merupakan ruang tiga dimensi, dan waktu memberikan total empat dimensi diamati, namun teori string awalnya mendukung kemungkinan sepuluh dimensi – enam yang tersisa yang kita tidak dapat mendeteksi secara langsung. Ini kemudian meningkat menjadi 11 dimensi yang didasarkan pada berbagai penafsiran dari teori sepuluh dimensi yang menyebabkan lima teori parsial seperti yang dijelaskan di bawah ini. Super-teori gravitasi juga memainkan bagian penting dalam membangun keberadaan dimensi 11.

Para “string” bergetar dalam beberapa dimensi, dan tergantung pada bagaimana mereka bergetar, mereka mungkin dilihat dalam ruang tiga dimensi sebagai materi, cahaya, atau gravitasi. Getaran dari string inilah yang menentukan apakah ini materi atau energi, dan setiap bentuk materi atau energi adalah hasil dari getaran “string”.

Closed Meetings to Investigate Mysterious Sniper at Freeport

Friday, 17 July 2009 | 11:59 WIB
Reports journalist KOMPAS Aryo Wisanggeni G

Timika, KOMPAS.com petinggi Para-military police and the meeting closed at Rimba Papua Hotel, Timika, capital of Mimika regency, Papua, Friday (17 / 7) this. Meetings are a series of terror-related shooting that occurred in the area of PT Freeport Indonesia (PTFI).

Meetings attended by Assistant Operations TNI TNI Mayjen Supiadin AS, Deputy Operations Headquarters of the Police of the Republic of Indonesia Irjen SY Wenas, the Corps Brigade Irjen Cars Imam Sudjarwo and Regional Head of Military Staff Komando XVII / TNI Cenderawasih Brigjen Hambali H. Read More

Former Freeport CEO is One of the Victims of Explosion

Friday, 17 July 2009 | 12:21 WIB
Reports journalist KOMPAS.com Caroline Damanik

JAKARTA, KOMPAS.com – Former President of PT Freeport Indonesia Adrianto Magribi also include become one of the victims of bomb explosion at the Mega Kuningan area of Jakarta, before morning, Friday (17 / 7).

This artist is recognized by senior Christine Hakim Adri a look at the Installation Emergency Medistra Hospital this afternoon. Christine said Adri condition is not too severe. In addition to burns around pelipisnya, Christine also says the heel Adri still possessed the bloody glass. “But, Mrs. Ade (Adri wife) continue to assist,” he said. Read More

At Least Four Killed in Explosions in Two Jakarta Hotels

Friday, 17 July 2009 | 9:45 AM

JAKARTA, KOMPAS.com-Explosions rocked Ritz-Carlton and JW Marriott Hotels in Mega Kuningan area, Central Jakarta, early Thursday, killing at least four people and injuring several others.

Ritz-Carlton Hotel was supposed to accommodate footballers of the Manchester United (MU) of Britain, who are expected to arrive in Jakarta on Saturday (July 18). A 90-member team of MU, consisting of officials and players, are scheduled to arrive at Halim Perdanakusuma airport by a chartered plane.

The explosions in the two hotels at Kuningan area, were herd twice at around 7.50 am and 7.55 am local time. Policemen have already arrived at the scenes of the explosions and the victims have been rushed to nearby hospitals. Coordinating Minister for Political, Legal and Security Affairs Widodo AS visited the scenes of the bombings at around 9 am local.

The Marriott Hotel bombed on August 5, 2003, killing 12 people, including a Dutch national, and injuring 147 others. The Marriot bombing was believed to be masterminded by Azhari Husin and Noordin M Top, both Malaysian nationals.

Azhari was killed in a police raid in East Java in November 2005, and Noording M Top is still at large. Azhari and his fellow Noordin Mohammad Top, a terror coordinator of the Al-Qaeda linked in Southeast Asia of Jemaah Islamiyah militant network, are believed as the masterminds of a series of major terrorist acts in Indonesia, including the Bali bombings in 2002, JW Marriot hotel explosions in Jakarta in 2003, a deadly blast in Australian Embassy in Jakarta in 2004, and bombings in Bali in October 2005 that killed more than 220 people.

Sumber : Antara
Source: http://english.kompas.com/read/xml/2009/07/17/09455282/At.Least.Four.Killed.in.Explosions.in.Two.Jakarta.Hotels