Ditemukan 18 dokumen yang sesuai dengan query
Apazidis, Nicholas
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One of the main reasons for continuing interest in shock focusing is its ability to concentrate energy in a small volume and produce extreme temperatures and pressures in fluids in a controlled laboratory environment. The phenomenon of shock wave focusing leading to extreme conditions in fluids during micro- and nanosecond time intervals is a spectacular example of mechanics at small length and time scales revealing the major properties of shock dynamics including high-temperature gas phenomena. ...
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Switzerland: Springer Cham, 2019
e20501066
eBooks Universitas Indonesia Library
Marpaung, Mangasi Alion
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ABSTRACT
A comprehensive study has been made on the dynamical process taking place in the laser-plasma generation i.nduced by a TEA CO2 laser bombardment on metal target and non-metal target Eom low to high pressures surrounding gas. ln the case of metal target, pure zinc plate was used as a target and bombarded with 400 ml laser pulse energy. Dynamical characterization of plasma expansion and excitation were examined in detail both for target atomic emission (Zn ...
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2000
D1361
UI - Disertasi Membership Universitas Indonesia Library
Gusti Rizky Teguh Ryanto
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Extracorporeal Shock Wave Lithotripsy (ESWL) merupakan terapi non-invasif yang menjadi tatalaksana lini pertama batu ureter. Terdapat berbagai faktor yang diduga dapat mempengaruhi tingkat keberhasilan ESWL, diantaranya lokasi batu dan ukuran batu ureter. Penelitian ini bertujuan untuk membuktikan adanya hubungan antara lokasi batu dan ukuran batu dengan tingkat keberhasilan ESWL pada pasien batu ureter. Penelitian dilakukan di Departemen Urologi Rumah Sakit Cipto Mangunkusumo dengan mengambil 106 data rekam medis pasien laki-laki tahun 2009-2011 dengan batu ureter ...
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Jakarta: Fakultas Kedokteran Universitas Indonesia, 2013
S-Pdf
UI - Skripsi Membership Universitas Indonesia Library
Maria Margaretha Suliyanti
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A study was performed on a laser-induced shock wave plasma generated on high concentration Au-Ag-Cu alloys by a Q-switched Nd-YAG laser of 4.8 mJ under reduced air pressure of 2 Torr. It was found that the total emission intensity of the secondary plasma is proportional to the intensity of the primary plasma, Assuming linear proportionality between the intensity of the primary plasma and the number of atoms vaporized from the target, it is proposed that ...
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Fakultas Teknik Universitas Indonesia, 2001
T8124
UI - Tesis Membership Universitas Indonesia Library
Desy Meilayanti
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Penelitian ini menguji metode Deterministic Queuing dan metode Shock Wave untuk menganalisa kemacetan lalu lintas rutin akibat bottleneck pada ruas jalan dengan hambatan (non freeway) berdasarkan prinsip dinamika lalu lintas. Dinamika lalu lintas menggambarkan bahwa arus lalu lintas berubah secara konstan berdasarkan ruang dan waktu sebagai hasil interaksi antara pengemudi, kendaraan, dan jalan. Prinsip konservasi kendaraan akan digunakan dalam menganalisa mekanisme dinamik arus lalu lintas pada kondisi macet.
Penelitian ini bertujuan untuk mendapatkan rekomendasi mengenai penggunaan ...
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Depok: Fakultas Teknik Universitas Indonesia, 2004
T14812
UI - Tesis Membership Universitas Indonesia Library
Kurnia Lahna
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A special interferometric technique with high sensitivity has been devised on the basis of rainbows refractometer without the use of an additional and delicate amplitude-splitting setup. This new technique was use for the characterization of shock wave plasma induced by a Q-sw Nd-YAG laser on various kinds of metal samples under reduced gas pressures. An unmistakable signal of density jump was detected simultaneously with the emission front signal. It is proved that at the initial ...
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2000
T4004
UI - Tesis Membership Universitas Indonesia Library
Pardede, Marincan
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In spite of abundant experimental evidences supporting the viability of the laser induced shock wave plasma model for the explanation of the important features ofthe plasma and the associated spectroscopic characteristics, a controversy on the atomic excitation mechanism in the plasma has remained to be completely resolved. In this study the contributions of the shock wave model and two other most popular models, the electron-ion recombination model and thc electron collision model were thoroughly investigated. ...
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Depok: Fakultas Teknik Universitas Indonesia, 2002
D1367
UI - Disertasi Membership Universitas Indonesia Library
Pardede, Marincan
"
ABSTRACT
In spite of abundant experimental evidences supporting the viability of the laser
induced shock wave plasma model for the explanation of the important features ofthe
plasma and the associated spectroscopic characteristics, a controversy on the atomic
excitation mechanism in the plasma has remained to be completely resolved. In this
study the contributions of the shock wave model and two other most popular models,
the electron-ion recombination model and thc electron collision model were
thoroughly investigated. For that purpose, a special technique ...
"
2002
D268
UI - Disertasi Membership Universitas Indonesia Library
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Baground: the optimal management of lower calyceal stones is still controversial, because no single method is suitable for the removal of all lower calyceal stones. Minimally invasive procedures such as extracorporeal shock wave lithotrispy (ESWL), percutaneous nephrolithotomy (PNCL) and flexible ureteroscopy (fURS) are the therapautic methods for lower calyceal stones. the aim of this study was to identify the optimal management of 10-20 mm lower pole stones.
Methods : a meta-analysis of cohort studies published ...
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Jakarta: Interna Publishing, 2018
610 IJIM 50:1 (2018)
Artikel Jurnal Universitas Indonesia Library
Takayama, Kazuyoshi
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This book presents a wealth of images of shock wave phenomena, gathered by the author over the past 40 years. Shadowgrams and interferograms of basic shock-dynamic topics such as reflection, diffraction, refraction, and focusing of shock waves in gases and liquids are sequentially displayed. Though the images themselves are self-explanatory, brief explanations of the experimental conditions are included, so as to facilitate analysis and numerical reproduction of the image data.
In addition, the book presents interferometric ...
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Switzerland: Springer Cham, 2019
e20510999
eBooks Universitas Indonesia Library
