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Perancangan Pompa Torak 3 Silinder Untuk Injeksi Lumpur Kedalaman 10000 FT dengan Debit 500 GPM (Studi Kasus Sumur Pemboran Pertamina Hulu Energi - West Madura Offshore) Setiadi, Setiadi; Djoni, I Made Arya
Jurnal Teknik ITS Vol 2, No 2 (2013)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LPPM), ITS

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Abstract

Suatu operasi pemboran sumur minyak ataupun gas, diperlukan suatu sistem pemompaan yang bertujuan untuk menginjeksikan lumpur pemboran kedalam sumur. Lumpur pemboran merupakan faktor yang penting dalam pemboran. Dalam proses pemboran langsung, mata bor (bit) yang dipakai selalu menggerus batuan formasi dan menghasilkan serpihan pemboran (cutting), sehingga semakin dalam pemboran maka semakin banyak pula cutting yang dihasilkan. Agar tidak menumpuk dan menyebabkan drill collar terjepit, maka serpihan tersebut perlu diangkat ke permukaan dengan baik. Untuk itu diperlukan sebuah pompa yang mampu mensirkulasikan lumpur pemboran dari mud pit ke dalam sumur dan kembali ke mud pit. Perancangan pompa torak ini berdasarkan pada kedalaman sumur pemboran dan debit pemompaan yang dibutuhkan. Selajutnya ditentukan besarnya kerugian-kerugian sepanjang jalur sirkulasi fluida untuk mendapatkan daya minimum yang dibutuhkan pompa. Hasil yang didapatkan dari perancangan pompa torak ini adalah power minimum minimum pompa sebesar 700 HP dengan diameter silinder 6,5 inch dan panjang langkah14,65 inch.
ANTROPOLOGI DAN STUDI MIGRASI INTERNASIONAL Setiadi, Setiadi
Jurnal Humaniora Vol 12, No 1 (2000)
Publisher : Faculty of Cultural Science Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jh.1294

Abstract

Teori migrasi internasional mencoba menjelaskan alasan-alasan yang mendasari seseorang melakukan migrasi ke negara lain dan alasan mengapa migrasi selalu terjadi berulang-ulang, termasuk dampak yang diakibatkannnya. Teori yang ada dapat digolongkan dalam tiga pendekatan yakni pendekatan fungsional, struktural, dan teori yang mencoba menggabungkan keduanya. Pada sisi lain, tampak adanya kekosongan pendekatan budaya dalam menjelaskan fenomena migrasi internasional tersebut. Tulisan ini merupakan kajian awal untuk melihat secara komprehensif berbagai kemungkinan studi antropologis terhadap fenomena migrasi internasional di Indonesia dan kemungkinan pengembangannya.
SOCIAL-ECONOMIC IMMOBILITY: A STUDY OF FISHERMEN’S STRUGGLE AMONG CORPORATION POWERS IN THE EAST COAST OF KALIMANTAN, INDONESIA Setiadi, Setiadi; Yuliono, Agus; Satiti, Sonyaruri
Jurnal Humaniora Vol 29, No 1 (2017)
Publisher : Faculty of Cultural Science Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jh.22562

Abstract

A majority of fishermen in the coastal areas of Bumi Seribu Nyiur Melambai, East Kalimantan, Indonesia, are migrants from other islands of Indonesia. This paper presents results from a research of the fisherman community. Most of the fisherman came from lower-middle-class families. Both lower-and lower-middle-class fisherman have access to the development program, aids and others resources delivered by government and international corporate. This paper describes how most fisherman see and believe that Bumi Seribu Nyiur Melambai is an area of battle for many actors to upscale their economic and social mobility through accumulation of wealth and social status. Many fishermen express the ambiguity, uncertainty, and marginality of their social-economic status. The marginal status is caused by (i) Long Story of Unequal Social Structure; (ii) elite capture of programs and aids (iii) uncertainty and the loss of fishing area due to the presence of the company; (iv) Their technology are not able to resist the change of seasons. Data in this research are collected by qualitative and quantitative method, such as a participatory observation, in-depth interview, FGD, and survey.
KONTEKS SOSIOKULTURAL MIGRASI INTERNASIONAL: KASUS DI LEWOTOLOK, FLORES TIMUR Setiadi, Setiadi
Populasi Vol 10, No 2 (1999): Desember
Publisher : Pusat Studi Kependudukan dan Kebijakan, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (164.369 KB) | DOI: 10.22146/jp12481

Abstract

One of the extern factors that caused the socio-cultural change in a society is migration. How the migration process influenced the alteration process were so much influenced by the area of origin. The impact of international migration to the area of origin were influenced by the new value inter relation brought by migrants such as the physical, socio-economic and socio cultural aspect. The research results with an anthropological approach, supported with survey data in one of the sub districts in East Flores, showed that the strength of traditional value in controlling migrant behaviors existed through formalization with various social control systems. This system could eliminate the negative impact of migration, even though the condition could cause a society dynamic block. The physical condition of the research area that could not be developed also made it more hampered. Hence, modernization and the area development process could not be spurred with international migration.
APPLICATION OF NATURAL ZEOLITE AS A COMPONENT OF CATALIST BUFFER FOR HYDROGENATION REACTION OF CO2 AND CRACKING OF PALM OIL Setiadi, Setiadi; Darmawan, Yanes; Fitria, R. Melisa
Jurnal Zeolit Indonesia Vol 6, No 1 (2007)
Publisher : Jurnal Zeolit Indonesia

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Abstract

This research was started with making a catalyst of CuO/ZnO/ZSM-5 with copresipitation method which using nitrate salts of Cu and Zn at buffer of zeolite ZSM-5 with loading (weight CuO and ZnO into their buffer) 10%, 20%, 30%, 40% and the pure of ZSM-5. The product of catalyst is then activated tested by hydrogenation reaction, where CO2 gas become the methanol by reacting of CO2 dan H2 into unggun reaction in operation condition: the pressure of 25 bar, with temperature at 250ºC, feeding ratio CO2/H2 = 1 : 3. The making catalyst of CuO/ZnO/ natural zeolite each with impregnation method and physical mixing at the best loading in the result of activities test from all of catalyst CuO/ZnO/ZSM-5 by the results of preparation of copresipitation methods. The result of catalyst test indicate that the methanol (CH3OH) can be made of the main feeding of CO2 and H2 gas with catalyst of CuO/ZnO/ZSM-5 and catalyst of CuO/ZnO/ natural zeolite from the result of copresipitate preparation, impregnation and physical mixing. The test of CuO/ZnO/ZSM-5 catalyst resulting of preparation copresipitation indicate that catalyst with loading 30% yielding methanol (0.1359%). The method of copresipitation is the best among the other methods. We also obtained the buffer of natural zeolite from Malang can also give yield of methanol product although it’s not as high as with buffer of ZSM-5. The cracking reaction of oil palm using a natural zeolite toproduce gasoline fraction of hydrocarbon compound in fixed bed reactor in atmospheric pressure and the temperature at 350-500ºC. The natural zeolite with addition of B2O3 0-20% is used as catalyst with variabel temperature, type of feeding and B2O3 addition. The characteristic for seeing the surface area with BET method and crystalization of B2O3 with XRD method. Addition of B2O3 optimum of 5% gave the yield 52.3% for feeding POME and 38% oil palm and methanol.
CATALIST PERFORMANCE OF SYNTETIC ZEOLITE ZSM-5 – Al2O3 IN CRACKING REACTION OF PALM OIL TO BECOME GASOLINE FRACTION OF HYDROCARBON Setiadi, Setiadi; W., Benny A.
Jurnal Zeolit Indonesia Vol 5, No 2 (2006)
Publisher : Jurnal Zeolit Indonesia

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Abstract

The requirement of fuel increases without balancing with its production causing the oil resources from fuel will immediately finished. Therefore, palm oil as renewable energy resources is selected for fuel production especially gasoline. Catalitic cracking process by using ZSM-5/Alumina catalys is selected in this research. The reaction was conducted in a simple fixed bed reactor with the pressure of 1.5 atm during half hour and WHSV 1,8 h-1 dan 2,4 h-1. The reaction result product then analyzed by using GC-FID for identify the gasoline fraction obtained, and FT-IR for identify the bonding kind of the samples. The baits used were pure palm oil, oxydized oil,POME (Palm Oil Methyl Esther), and oil with methanol. The parameters of the research were temperature (350 – 500 °C), catalist composition (5 - 20 %), and kinds of baits. The results showed that the composition of catalist 5% at reaction temperature of 400 °C with the bait of POME resulting the highest gasoline yield of 63,1%.
PENGAMBILAN KEPUTUSAN PENGGUNAAN ALAT KONTRASEPSI ISTRI DALAM KELUARGA Setiadi, Setiadi; Iswanto, Lilik
Jurnal Populasi Vol 23, No 1 (2015)
Publisher : Pusat Studi Kependudukan dan Kebijakan, Universitas Gadjah Mada

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Abstract

Salah satu kunci kesuksesan keluarga berencana adalah partisipasi para istri dan suami dalam pemakaian kontrasepsi. Penggunaan kontrasepsi selama ini masih didominasi oleh istri. Pembuatan keputusan dalam pemakaian kontrasepsi oleh istri dipengaruhi oleh beberapa faktor. Tingkat pengetahuan dan pengalaman pemakaian kontrasepsi akan mempengaruhi pembuatan keputusan. Banyak istri tidak mengetahui jenis kontrasepsi yang terbaik buat dirinya dan bagaimana kelebihan dan kekurangan dari masing-masing metode kontrasepsi. Faktor istri yang bekerja di luar rumah mempunyai pengaruh dalam meningkatnya determinasi sang istri dalam pembuatan keputusan. Dalam kelompok umur di atas 24 tahun, istri juga memiliki peran yang cukup kuat. Demikian juga, determinasi pengambilan keputusan masalah-masalah dalam keluarga baik oleh istri atau bersama-sama dengan berkontribusi besar akan meningkatkan kemampuan istri untuk mengambil keputusan dalam pemakaian kontrasepsi.
MASALAH REINTEGRASI SOSIAL DAN EKONOMI MIGRAN KEMBALI* Setiadi, Setiadi
Populasi Vol 12, No 1 (2001): Juni
Publisher : Pusat Studi Kependudukan dan Kebijakan, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (73.999 KB) | DOI: 10.22146/jp12274

Abstract

At the last ten years, the migration trend has become interested to be studied. The feminization trend of international migration is one of the aspects that need further analysis. Unfortunately, the existing studies have not been able to answer the issue. One of the issues is the problem of life of women return migrant on the context of the process of reintegration in the social economic life and social culture of households and origin area community. This research shows that the changes of the material basics of women return migrant effects on the changing of the social economic aspiration. On the other hand, migrating can improve the bargaining position of women on the household life. It seems that migrant can act as the changing agent in the society. The reducing of the old values occurs along with the migrant reintegration process resulting the life pattern in some aspects of the household and community life differs than before the migration.
A Study of CO2 Absorption Using Jet Bubble Column Setiadi, Setiadi; Hadiyani, Nita Tania; Hantizen, Hantizen; Supramono, Dijan
Makara Journal of Technology Vol 12, No 1 (2008)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (150.276 KB) | DOI: 10.7454/mst.v12i1.139

Abstract

The phenomenon of plunging jet gas-liquid contact occurs quite often in nature, its momentum carries small air bubbles with it into the reactor medium. The momentum of the liquid stream can be sufficient to carry small bubbles completely to the bottom of the vessel. A stream of liquid falling toward a level surface of that liquid will pull the surrounding air along with it. It will indent the surface of the liquid to form a trumpet-like shape. If the velocity of the stream is high enough, air bubbles will be pulled down, i.e. entrained into the liquid. This happens for two main reasons: air that is trapped between the edge of the falling stream and the trumpet-shaped surface profile and is carried below the surface. This study investigates the potential of a vertical liquid plunging jet for a pollutant contained gas absorption technique. The absorber consists of liquid jet and gas bubble dispersed phase. The effects of operating variables such as liquid flowrate, nozzle diameter, separator pressure, etc. on gas entrainment and holdup were investigated. The mass transfer of the system is governed by the hydrodynamics of the system. Therefore a clear and precise understanding of the above is necessary : to characterize liquid and gas flow within the system, 2. Variation in velocity of the jet with the use of different nozzle diameters and flow rates, 3. Relationship between the liquid and entrained airflow rate, 4. Gas entrainment rate and gas void fraction.
SCIENTIFIC REASONING ABILITY OF PROSPECTIVE STUDENT TEACHER IN THE EXCELLENCE PROGRAM OF MATHEMATICS AND SCIENCE TEACHER EDUCATION IN UNIVERSITY OF MATARAM Jufri, A. W.; Setiadi, Setiadi; Sripatmi, D
Jurnal Pendidikan IPA Indonesia Vol 5, No 1 (2016): April 2016
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v5i1.5792

Abstract

The purpose of this study is to investigate the scientific reasoning ability of the prospective student teacher, and to analyze the difference in scientific reasoning ability between students in the study programs. The sample set consisted of 179 students joining the Excellence Program of Mathematics and Science Teacher Education in the Faculty of Teacher Education (FTE) in the University of Mataram. The Classroom Test of Scientific Reasoning (CTSR) was translated into Indonesian language and used to measure the student scientific reasoning ability. The results of this study revealed that 95.5% students had low reasoning ability and were categorized as concrete and transitional reasoner. Only few students (4.5%) reached the category of formal operational reasoner. In addition, significant differences of the students reasoning ability emerged among the third and the fifth semester students, as well as students in the four study programs.