Yth. Rekan-Rekan Geoscientists HAGI Komwil Jakarta kembali melaksanakan salah satu misinya untuk sharing knowledge kepada anggotanya dan komunitas geoscientists di Indonesia. Kali ini HAGI Komwil Jakarta bekerjasama dengan NGC (National GeoConsultant) melaksanakan seminar setengah hari: "The Continuous Wavelet Transform Seminar" yang akan dilaksanakan pada:
Hari/Tanggal: Kamis, 20 Juli 2006 Waktu: Pukul 08.00-13.00 WIB Tempat: Sahid Jaya Hotel, Jakarta Pembicara: Budi Eka, MSc. (UGM), Makky Jaya, Dr. -rer. nat. (ITS), Sonny Winardhi, PhD. (ITB), Adriansyah, PhD. (Pertamina), Batara Simanjuntak, MEng. (NGC). Abstrak seminar kami cantumkan di bagian bawah email ini. Pendaftaran dapat dilakukan mulai sekarang melalui email ke: Susie ([EMAIL PROTECTED]); Tel. +62.21.7829434, Fax. +62.21.7829424. Biaya kepesertaan sebesar Rp 200.000,- (Dua ratus ribu rupiah) dapat dibayarkan on-site. Jumlah peserta dibatasi hingga 60 (Enam puluh) orang. HAGI Komwil Jakarta menyediakan makanan ringan serta teh-kopi dan makan siang untuk peserta seminar ini. Termasuk juga seminar kit dan makalah dari pembicara. Demikian yang dapat kami sampaikan. Kami sangat berharap rekan-rekan sekalian dapat berpartisipasi pada acara ini. Terima kasih. Salam, Martinus Sembiring Ketua HAGI Komwil Jakarta ----------------------- The Continuous Wavelet Transform Seminar - ABSTRACT Wavelet transform is a rapidly developing area in many disciplines including geophysics. The CWT has become a hot subject of discussion among the hydrocarbon explorationists lately. Pros and cons accumulate. But, have we really figures out all the basics as well as the more advance details? In the wavelet transform, a signal is represented by terms of a wavelet expansion that uses coefficients in a linier combination of the wavelet functions. The wavelet transform can not only provide insight on the combined temporal and spectral characteristics of signal, but it can also localize the target information in the time-frequency domain simultaneously, and this property can be advantageously used to extract information from a signal that is not possible to unravel with conventional Fourier transform. The wavelet transform distinguished itself from the short time Fourier transform for time-frequency analysis in that it provides an extra dimension to visualize and analyze a signal, that is represented by scale parameter. Non-stationary properties of the seismic signal are usually caused by dispersion, attenuation and other non-linier processes which vary with frequency and time simultaneously. Non-stationary properties of a seismic signal always related to reflection, refraction, coherent noise such as ground roll. These characteristics can be identified in time-frequency space. Wavelet transform has been used to analyze seismic signal in the form of time-variant signal. The trace of seismic signal divided into many parts and for each of it wavelet transform has been applied. According to the results of wavelet transform, the whole of trace can be characterized. In the other application, wavelet transform has been used successfully to attenuate ground roll and the other coherent noise of seismic data. While the long known Fourier transform decomposes seismic signal from sinus or cosines waves to a different frequency, the wavelet transform decomposes signal into dilated and translated wavelets. The transform provides flexible time-frequency window that automatically narrowed when observing high frequency phenomena and widens when observing low frequency environment. Some CWT based instantaneous attributes are: instantaneous amplitude, instantaneous frequency, time-frequency derivatives of instantaneous amplitude, instantaneous bandwidth, instantaneous Q and the new concept of singularity order. Some author claimed that recent application of the technique show the CWT attribute could even be used as direct hydrocarbon indicator. Thus, it is believed that, reservoir information could be extracted from seismic data alone. Has quantitative seismic interpretation advanced that much? WhatÂ’s the value of well petrophysic information ? How to make better use of the CWT technique? Come and join our half day seminar on the CWT. ----------------------- Send instant messages to your online friends http://uk.messenger.yahoo.com --------------------------------------------------------------------- ----- PIT IAGI ke 35 di Pekanbaru ----- Call For Papers until 26 May 2006 ----- Submit to: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, send email to: iagi-net-unsubscribe[at]iagi.or.id To subscribe, send email to: iagi-net-subscribe[at]iagi.or.id Visit IAGI Website: http://iagi.or.id Pembayaran iuran anggota ditujukan ke: Bank Mandiri Cab. Wisma Alia Jakarta No. Rek: 123 0085005314 Atas nama: Ikatan Ahli Geologi Indonesia (IAGI) Bank BCA KCP. Manara Mulia No. Rekening: 255-1088580 A/n: Shinta Damayanti IAGI-net Archive 1: http://www.mail-archive.com/iagi-net%40iagi.or.id/ IAGI-net Archive 2: http://groups.yahoo.com/group/iagi ---------------------------------------------------------------------
