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All Journal Jurnal Manajemen Teknologi IJOG : Indonesian Journal on Geoscience
Deny Juanda Puradimaja
Teknik Geologi ITB, Jln. Ganesha No. 10 Bandung
Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences

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Perkembangan Geologi pada Kuarter Awal sampai Masa Sejarah di Dataran Yogyakarta Mulyaningsih, Sri; Sampurno, Sampurno; Zaim, Yahdi; Puradimaja, Deny Juanda; Bronto, Sutikno; Siregar, Darwin Alijasa
Indonesian Journal on Geoscience Vol 1, No 2 (2006)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1562.85 KB) | DOI: 10.17014/ijog.v1i2.13

Abstract

http://dx.doi.org/10.17014/ijog.vol1no2.20065The uplift of Southern Mountains in Early Pleistocene has formed the Yogyakarta Basin. In this basin, the Merapi volcanic activity has been developing. Based on 14C dating in cinder deposits exposed at Cepogo, the volcanic activity took place since ±42 ka. While on the basis of K/Ar dating in andesitic lava at Bibi Volcano, the activity took place since 0.67 ma. The high in the south and the appearance of Merapi volcanic dome in the north had caused a fl at valley. The southern part of the valley is bounded by the Southern Mountains and the western part is bounded by the West Progo Mountains. In the present time, the lithology of the areas which are interpreted as a palaeo-valley is composed of black clay deposits. This black clay is a contact between the basement rocks and Merapi volcanic deposits. The black clay deposits exposed in the Progo River (Kasihan) has been developed since ±16.59 to 0.47 ka, while in the Opak River (Watuadeg) 6210 y BP. Younger black clay deposits intersecting with lahars are also exposed at the Winongo River and have an age of 310 y BP. The age data of volcanic stratigraphy shows that Merapi activities had taken place since ±6210 up to ±310 years ago.  
Dinamika pengendapan lahar permukaan pada alur-alur lembah di bagian selatan Gunung Api Merapi, Yogyakarta Mulyaningsih, Sri; Sampurno, Sampurno; Zaim, Yahdi; Puradimaja, Deny Juanda; Bronto, Sutikno
Indonesian Journal on Geoscience Vol 1, No 3 (2006)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (907.621 KB) | DOI: 10.17014/ijog.v1i3.15

Abstract

http://dx.doi.org/10.17014/ijog.vol1no3.20062Endapan aliran rombakan Gunung Api Merapi, yang lebih dikenal sebagai lahar, terbentuk dari hasil longsoran endapan awan panas yang dipicu oleh curah hujan yang sangat tinggi. Pada saat ini, endapan awan panas tersebut berasal dari guguran kubah lava. Material suspensi tersebut selanjutnya menuruni lereng dengan kecepatan yang tinggi, menghasilkan aliran turbulen. Aliran tersebut biasanya berkembang pada daerah dengan perbedaan morfologi berkemiringan lereng tinggi ke landai, atau yang sering dikenal sebagai daerah tekuk lereng. Studi ini didasarkan pada pengamatan dan pengukuran fragmen lahar yang berukuran besar di permukaan. Analisis meliputi arah penyirapan, bentuk, dan besar butir fragmen. Hasil penelitian mendapatkan model arah aliran fragmen besar lahar dari bagian atas aliran rombakan, yang membentuk “model punggung katak” atau “model punggung gajah”. Bagian depan katak atau gajah (kepala) yaitu arah aliran atau bagian depan aliran. Hasil penelitian juga menunjukkan bahwa model tersebut berlaku pada fragmen dengan diameter 90 cm atau lebih besar. Di daerah penelitian, fragmen dengan diameter 90 cm mencapai jarak hingga 22 km dari sumbernya. Hasil penelitian ini dapat digunakan sebagai model untuk menentukan arah aliran lahar (aliran rombakan) purba yang sumbernya belum diketahui.  
Quality Policy as a Manifestation of Strategic Plan at Bandung lnstitute of Technology,Indonesia Bijaksana, Satrio; Puradimaja, Deny Juanda
Jurnal Manajemen Teknologi Vol 7, No 1 2008
Publisher : SBM ITB

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Abstract

Definition of quality in higher education has changed rapidly, especially in the last two decades, when quality assurance has turned into global issue in higher education management. In that context, Bandung Institute of Technology (ITB) has declared ITB Quality Policy 2006-2010 that symbolizes the institutional commitment to improve the quality in guided, continuous, and accountable manner. The Policy was developed based on the evaluation of the previous policy as well as the 2006-2010 strategic plan of ITB. Other than development guidelines on six different areas, the Policy also consists of a set of indicator and targets. In this conference, we will share the lessons learned from the development and implementation of this Policy. Keywords: quality policy, Institut Teknologi Bandung (ITB), higher education
Co-Authors Cut Novianti Rachmi, Cut Novianti Darwin Alijasa Siregar Dasapta Erwin Irawan, Dasapta Erwin Juneman Abraham Mitra Djamal Moch Tanzil Multazam Mukti, Rino Rakhmata Mulyaningsih, Indrya Sampurno Sampurno Satrio Bijaksana Sparisoma Viridi Sri Mulyaningsih Sutikno Bronto Yahdi Zaim