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Hasil Pencarian

Ditemukan 10 dokumen yang sesuai dengan query
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Wikaria Gazali
Pengenalan bentuk mobil dengan menggunakan fourier descriptors
" Dalam penelitian ini penulis membuat program Pengenalan Obyek ( Object Recognition ) mulai dari obyek yang berupa image, hingga mendapatkan parameter-parametemya (ciri-cirinya) sampai pada proses pengenalannya dengan Neural Network. Untuk proses pengenalan obyek dengan Neural Network penulis menggunakan Multi-Layer Back Propagation Neural Network Simulator. Persoalan yang paling penting dalam proses pengenalan obyek dua dimensi adalah pemilihan parameter (ciri) yang tidak.dipengaruhi oleh proses skala, rotasi dan translasi pada obyek berbentuk kontur (keliling garis tepi pada ... "
Depok: Fakultas Teknik Universitas Indonesia, 1998
T 2101
UI - Tesis Membership  Universitas Indonesia Library
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Nani Djohan
Pengukuran Parameter Transmisi Serat Optik dengan Teknik Back Scatter
" ABSTRAK
Sistem komunikasi serat optik pada saat ini mempunyai peranan yang sangat penting karena keunggulan-keunggulannya di bandingkan dengan sistem komunikasi yang lain.

Untuk dapat mengetahui kinerja sistem serat optik tersebut maka perlu di ketahui parameter transmisinya antara lain, yaitu rugi rambatan (loss) dan pelebaran pulsa (dispersi).

Dalam tesis ini dilakukan perancangan dan pembuatan peralatan untuk mengukur parameter transmisi serat optik dengan menggunakan metoda back-scatter, atau yang lebih dikenal dengan optical time domain reflectrometer (OTDR) ... "
1997
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library
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Y. W. Wempi Hapan
The theoretical and experimental studies of the characteristics of the X-cut annealed Proton-exchanged Lithium Niobate Symmetric Directional Coupler
" ABSTRACT
The combination of the coupled mode and normal mode theories has been used to formulaic the theoretical performance represented by the coupling length and crosstalk parameters of the X-cut APE-LN SDC fabricated using the benzoic acid as the proton source, where in this case the matrix effective refractive index (MERI) method is applied for solving the symmetric and antisymmetric propagation constants of the normal modes propagating in this device. The corresponding near field method has ... "
1996
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library
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Hidjan
Investigation on plasma formation by intense laser radiation
" ABSTRAK Tujuan dari eksperimen yang dilakukan adalah untuk menyelidiki hal-hal yang berkaitan dengan pembentukan plasma, yakni zat yang tersusun dari muatan-muatan listrik bebas berupa ion-ion positif dan elektron elektron negatif yang jumlahnya nyaris sama. Plasma yang digunakan dalam eksperimen terbentuk dari udara laboratorium yang di iradiasi dengan berkas laser energi tinggi ( IJ - 2J ) dalam sebuah chamber yang dilengkapi dengan suatu rangkaian listrik DC. Dengan memberikan beda tegangan tertentu antara dua elektrode yang berada dalam chamber, ... "
Depok: Fakultas Teknik Universitas Indonesia, 1994
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library
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Antonius Suhartomo
Design and construction of Bi-Directional Transmission System through single fibre with the same wavelength
" The advantages optical fiber in communication field are widely utilized in developing steps from electrical communication to optical communication. Optical fiber communication promise extremely high data rate over long distance transmission without needing to amplify and retransmit along the way. It is well understood that if frequency of the transmitted signals. is increased some problems such as electromagnetic interferences. crosstalk and signal distortions will appear. Those difficulties can. be solved or eliminated by using optical ... "
Depok: Universitas Indonesia, 1993
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library
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Andi Muhammad Natsir Amal
Temperature measurement by using Mach-Zehnder interferometer
" ABSTRACT
We proposed a method for measuring the temperature by using Mach - Zehnder Interferometer, one arms of Mach - Zehnder Interferometer was used as a test arms which was disturbed by an object, it's temperature was to be measured. In our experiment, we used a combustion flame and a heated welder with temperature variation as a testing object.

System, contains He - Ne laser source, two beams splatters and two mirrors which form two ... "
1992
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library
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Yuslan Basir
High voltage measurement by using electro-optic crystal
" ABSTRACT
High Voltage measurement based on the electro-optic effect of LiTaOa crystal plate has been developed. This crystal was placed between two parallel plates which more like capacitor arrangement.

On the first step, this system was capable only to measure the do voltage from 0 to 1 kV, and the ac voltage from 0 to 0.3 kV. But, by enlarging the spaces in between one side at crystal to one of the plate surface, d, ... "
1992
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library
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Kaunang, John Poerwadi
Radiation pattern of cone-shaped end face of optical fiber
" ABSTRACT
Recently, there -is a rapidly grow in the field of optical fiber communications, particularly in the technology of fiber waveguide which is used as transmitting media or communication lines. 'Due mayor problem in optical waveguide systems is the coupling loss in connectors or couplers for the purpose of gaining maximum coupling efficiency. This research is dedicated to obtain an efficient wavegui de devi ce by studyi ng the applicability of cone-shaped fiber end-face as fiber ... "
1988
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library
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Finita Textiani
Properties of fourier intensity filter for optical diferentiation
" Optical differentiation is one of many methods in the optical data processing that is useful for, e.g. image contouring. In this thesis, the differentiation filter is caried out based on the spatial filtering techniques. The ob ject is transformed with a Fourier lens to obtain the spatial frequency spectrum of the object at the Fourier plane. A spatial differentiation filter is placed at the Fourier plane. And finally, with another lens the filtered spectrum is ... "
Depok: Fakultas Teknik Universitas Indonesia, 1990
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library
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Goen Sarsono Kertojoedo
Comparison of autofluorescence of normal and cancer cells indusced bay nitrogen laser
" ABSTRACT
The autofluorescence spectra of human tissues excited with 33'7,1-nm line of pulse nitrogen laser have been measured. The autofluorescence spectra of cancerous tissues consistently exhibit characteristic peaks near E530-nm and 690-nm. which do not appear in the spectra of the corresponding normal tissues. Spectroscopic investigation indicates that the porphyrin compounds localized and retained in cancerous tissues might be responsible for this characteristic autofluorescence. This preliminary result suggests the possibility of employing spectroscopy tool for complementary ... "
Fakultas Teknik Universitas Indonesia, 1990
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library