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"Superstring theory is a promising theory which can potentially unify all the forces and the matters in particle physics. A new multi-dimensional object which is called "D-brane" was found. It drastically changed our perspective of a unified world. We may live on membrane-like hypersurfaces in higher dimensions ("braneworld scenario"), or we can create blackholes at particle accelarators, or the dynamics of quarks is shown to be equivalent to the higher dimensional gravity theory. All these scenarios are explained in this book with plain words but with little use of equations and with many figures. The book starts with a summary of long-standing problems in elementary particle physics and explains the D-branes and many applications of them. It ends with future roads for a unified ultimate theory of our world."

"long with Caltech physicist Mlodinow, University of Cambridge cosmologist Hawking mixes cutting-edge physics to answer three key questions-- Why is there something rather than nothing? Why do we exist? Why this particular set of laws and not some other?-- and explains that scientists are approaching what is called "M-theory," a collection of overlapping theories (including string theory) that fill in many (but not all) of the blank spots in quantum physics.Along with Caltech physicist Mlodinow (The Drunkard's Walk), University of Cambridge cosmologist Hawking (A Brief History of Time) deftly mixes cutting-edge physics to answer three key questions-- Why is there something rather than nothing? Why do we exist? Why this particular set of laws and not some other?-- and explains that scientists are approaching what is called "M-theory," a collection of overlapping theories (including string theory) that fill in many (but not all) the blank spots in quantum physics. This collection is known as the "Grand Unified Field Theories.""

"Alam semesta menyimpan keajaiban dan misteri yang sangat memesona yang sampai kini belum tersingkap seluruhnya oleh ilmu fisika. Keajaiban itu antara lain adalah planet-planet yang selalu beredar di garis edarnya, tidak pernah melenceng sedikit pun, dan tidak pernah bertabrakan satu sama lain. Bumi adalah keajaiban yang lain: Bumi berada di zona jarak yang begitu tepat terhadap Matahari sehingga iklim Bumi sangat sesuai bagi kehidupan manusia dan makhluk-makhluk lainnya. Keagungan rancangan seluruh alam semesta selalu membangkitkan keingintahuan selama berabad-abad: Kapan dan bagaimana alam semesta bermula? Mengapa kita ada di dunia ini? Bagaimana campur tangan Tuhan dalam rancang agung alam semesta? Dalam buku ini, Stephen Hawking dan Leonard Mlodinow menyajikan pemikiran sains terkini mengenai misteri alam semesta, dalam bahasa nonteknis yang cemerlang sekaligus sederhana. Buku ini adalah buku pedoman singkat, jelas, dan menyentak, yang menyajikan penemuanpenemuan yang akan mengubah pemahaman sekaligus mengusik keyakinan; buku ini mencerahkan dan menohok. Buku yang tiada duanya ""

"Dawai kosmik (cosmic strings) merupakan salah satu jenis defeksi topologi. Dalam kosmologi, fenomena defeksi topologi ini dapat terjadi karena konsekuensi perusakan simetri spontan pada awal alam semesta. Penelitian ini mempelajari solusi dari dawai kosmik yang memenuhi persamaan lagrangian Dirac-Born-Infeld dengan suku potensialnya tak bervakum, yakni potensial yang memiliki nilai vakum pada titik yang tak terhingga. Keadaan ini berada pada fisika energi tinggi. Kami memecahkan masalah persamaan differensial orde-2 secara numerik menggunakan metode tembak.

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Cosmic strings is one type of topological defect. In cosmology, topological defect can occur because of the consequence of spontaneous symmetry breaking in early universe. This research study the solutions that satisfy the equation Dirac-Born-Infeld (DBI) lagrangian with vacuumless potential, which is the potential that has vacuum values at infinity. This is the regime of very high energy physics. We solve the second order the differential equation numerically using shooting method. "