Judul: Analisis Data Complete Bouguer Anomaly Daerah Panas Bumi “A” dengan Metode Trend Surface Analysis Menggunakan Matlab.
Abstrak: Data complete bouguer anomaly (CBA) dalam survei gravitasi merupakan superposisi dari anomali regional dan residual yang terdapat di bawah permukaan daerah penelitian. Anomali regional memiliki frekuensi rendah dan berasosiasi dengan bawah permukaan yang dalam. Sedangkan anomali residual memiliki frekuensi tinggi yang terletak pada permukaan yang dangkal. Fokus eksplorasi geofisika umumnya terletak pada daerah bawah permukaan yang dangkal, karena permukaan dangkal memiliki benda anomali yang heterogen. Analisis polinomial trend surface analysis orde 1 sampai 5 digunakan untuk memisahkan anomali regional dan residual dari data CBA. Hasil pemisahan disajikan dalam bentuk peta kontur, kemudian hasil pemisahan dari setiap orde polinomial diinterpretasikan untuk mendapatkan informasi bawah permukaan. Perhitungan RMS (root mean square) error terhadap anomali residual menunjukan bahwa orde 2 polinomial menghasilkan nilai error yang terkecil.
Keyword: complete bouguer anomaly, trend surface analysis, pemisahan regional-residual

Judul: Analisis Perbandingan Metode Surface Related Multiple Elemination dan Transformasi Radon dalam Atenuasi Multiple pada Data Seismik 2D Perairan Dangkal di Cekungan Waipoga, Papua
Abstrak: Metode seismik umum digunakan dalam kegiatan eksplorasi hidrokarbon dengan memanfaatkan penjalaran gelombang suara. Data 2D seismik laut yang digunakan pada penelitian ini merupakan data mentah hasil akuisisi seismik laut di perairan dangkal Cekungan Waipoga, Papua. Data mentah hasil akuisisi mengandung multiple yang disebabkan oleh perbedaan nilai impedansi akustik yang besar pada batas lapisan, sehingga gelombang seismik yang dipancarkan terperangkap dalam lapisan air atau lapisan batuan dasar perairan. Multiple membuat gambaran penampang seismik menjadi tidak fokus pada sinyal primer. Oleh karena itu, diperlukan metode atenuasi multiple yang tepat sehingga dapat dihasilkan gambaran penampang yang lebih jelas. Penelitian ini menggunakan metode Surface Related Multiple Elimination (SRME) dan transformasi Radon sebagai metode atenuasi multiple pada data seismik yang diproses hingga hasil akhir Pre-Stack Time Migration (PSTM). Berdasarkan dari pengolahan yang telah dilakukan didapatkan hasil bahwa metode atenuasi multiple dengan metode SRME lebih efektif mereduksi multiple terutama pada near offset sedangkan metode transformasi Radon lebih baik dalam mengurangi multiple pada far offset.
Keyword: data seismik, far offset, multiple, near offset, SRME, transformasi Radon

Judul: Kloning dan Ekspresi Human Interferon-alfa2a pada Yeast Metilotropik Pichia pastoris
Abstrak: Interferon (IFN) is a group of proteins that are secreted by body cells as a result of exposure to biological vertebrates such as: viruses, bacteria, protozoa and other compounds. There are three types of interferon, namely: alpha (α), beta (β) and gamma (γ) IFN. Interferon-α2a belongs to the type I interferon. This protein has a molecular weight of 21.550 kDa and consists of 188 amino acids (23 amino acid of signal peptide and 166 amino acids of mature protein). Interferon-α2a is also known to be used for the treatment of hepatitis C and as anti-tumor and antivirus agents. Regulator gene for IFN production under normal conditions, is in the off position to IFN is not produced. But when there are external stimuli, both viral and bacterial infections, a regulator gene switches on, and IFN production system running. At the time of an attack from a variety of disease agents actually the body will produce IFN, but generally the amount produced is not sufficient to fight the disease agents that multiply very quickly. Therefore IFN intake from outside is needed. This is the beginning of the use of IFN as a drug. Genetic engineering is an activity to manipulate the genes to get new products by creating recombinant DNA through gene insertion. Recombinant DNA technology has been used to produce IFN. Yeast such as Pichia pastoris can be an alternative as the host (system) to express human interferon genes and as a producer of IFN protein. Expression system P. pastoris offers several advantages for the production of recombinant proteins, such as: the high level expression of recombinant proteins, ease of scaling-up fermenter, low cost and ease of transformation techniques and selection of transformed cells such as bacteria . The existence of inducible AOX1 promoter is very strong, easily control the expression of recombinant proteins by induction. AOX1 is a promoter that controls gene expression of alcohol oxidase to metabolize methanol as carbon source of P. pastoris. Therefore,this study aimed to clone human interefron-α2a (hifnα2a) gene in E. coli and express it in metylotrophic yeast P. pastoris. Vector used in this study is pPICZαB (Invitrogen). Ligation process between insert (hifn-α2a gene) and vector (pPICZαB) performed by using T4 DNA ligase, which functions synthesize the formation of phosphodiester bonds linking the nucleotides with nucleotide insert plasmid vectors to produce recombinant (pPICZαB-hifnα2a). This recombinant plasmid transformed into XL1 blue cells (E. coli) by Heat shock method. The results of sequencing analysis (clone 6) using 5'AOX and 3'AOX primers indicate that DNA base sequence of human IFN-α2a genes has been subclone into pPICZαB vector (in frame). Recombinant plasmid (clone 6) linearized using BstX1 enzyme before transformed into X33 yeast cell. Transformation into cell was done by Electroporation. The X33 cell P. pastoris strain was used to express human interferon-α2a. X33 is strains with the phenotype Mut+ (methanol utilization plus) and can be used for positive transformants selection using zeocin. Phase protein production work using Mut+ strain occurred in two phases. The first phase is the use of glycerol to obtain a certain amount of biomass (high cell
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