Identification of Reservoir Thickness and Estimation of Hydrocarbon Reservation Used the Pre-Stack Depth Migration (PSDM) in Cikung Area

Information from the geological data shows that the Cikung field has the complex structure which is characterized by carbonate reef. Therefore, it is required in the domain depth migration (PSDM) using interval velocity model is sensitive to variations in vertical and horizontal velocity to identify the thickness of the reservoir and estimation of hydrocarbon reserves. Stages include making the depth structure maps, map making the thickness of the reservoir, and the calculation of hydrocarbon reserves. The results showed that the thickness of the reservoir in Cikung Field, estimated to range from 71 meters to 175 meters with the prospect reservoir is at a depth of 1216 meters to 1247 meters from the surface. Hydrocarbon deposits (oil) is estimated at 1,134 × 106 or 1,311 × 108 kilo litre by the porosity of 22.6% and 70.7% water saturation

Pemetaan Zona Rip Current Sebagai Upaya Peringatan Dini Untuk Bahaya Pantai (Lokasi Kajian : Pantai Kuta Bali)

Wisata pantai merupakan wisata favorit yang mengandung resiko tinggi. Bahaya pantai salah satunya adalah kecelakaan yang terjadi di wilayah pantai dan beberapa kasus kecelakaan yang terjadi di pantai biasanya akibat pengawasan yang lemah, kurangnya pemahaman wisatawan akan bahaya pantai, fasilitas pengawasan yang kurang memadai, atau wisatawan yang tidak dapat berenang kemudian terseret arus sampai ke tengah laut. Menurut Daryono (2010), arus yang membawa korban tersebut adalah Rip Current. Penelitian ini bertujuan untuk Tujuan penelitian ini adalah untuk mengetahui zona potensi rip current, Mengetahui persentase potensi terjadinya rip current di Pantai Kuta Bali. Metode penelitian yang digunakan adalah metode kuantitatif. Hasil penelitian menunjukkan bahwa Pantai Kuta Bali dibagi kedalam 2 (dua) zona, yaitu zona aman dan zona bahaya. Pada zona aman terdapat 2 (dua) pola rip current, karena gelombang yang datang tidak membentuk sudut yang tegak lurus terhadap garis pantai, sedangkan pada zona berbahaya terdapat 7 (tujuh) pola rip current. Persentase terjadinya rip current di sepanjang Pantai Kuta Bali adalah sebesar 83%, nilai ini berdasarkan kejadian gelombang pecah tipe plunging. Slope pantai akan mempengaruhi terjadinya rip current. Pada penelitian ini pantai landai memiliki potensi rip current paling besar yaitu sebesar 91.5% yang memiliki slope sebesar 7.5˚, berada pada koordinat 08˚43'23” LS dan 115˚10'9” BT. Sedangkan, pantai datar memiliki potensi rip current yang kecil yaitu sebesar 51.5% dan memiliki slope antara 0.5˚ sampai 1.8˚

Pengaruh Capital Adequacy Ratio (Car), Loan to Deposit Ratio (Ldr) Dan Bopo Terhadap Profitabilitas (Roa Dan Roe) Bank Persero Indonesia Yang Dipublikasikan Bank Indonesia Periode 2010 – 2015

State-owned banks have involvement with many parties in their business, so the performance maintenance is benecessary to deal with banking risks that may arise. The downward trend in the profitability of state-ownedbanks indicated by Return on Assets (ROA) and Return on Equity (ROE) becomes a problem when the CapitalAdequacy Ratio (CAR), Loan to Deposit Ratio (LDR), and ROA experiencing upward trend.The purpose of this study was to determine the effect of CAR, LDR and ROA on ROA and ROE withexplanatory method. The study population was a quarterly financial report of four state banks in Indonesia2010-2015 so that the number of samples obtained as many as 96 by using purposive sampling. Data analysistechnique used is the classical assumption test, linear regression test, and the test of significance using SPSS15.0 software application.Results and discussion: CAR significant positive effect on ROA of 5.5%, LDR significant negative effecton ROA of 28.6%, and ROA significant negative effect on ROA of 68.8%. CAR, LDR, and ROA significantpositive effect on ROA 69.5%. CAR does not affect the ROE, LDR significant negative effect on ROE of 31%,and ROA significant negative effect on ROE of 48.5%. CAR, LDR, and ROA significant positive effect on ROEof 50.9%.Conclusions and suggestions: CAR, LDR and BOPO positive effect on profitability (ROA and ROE).State-owned banks are expected to increase liquidity and operational efficiency by reducing the percentage ofLDR and ROA

The Characteristics of Significant Wave Height and Sea Surface Temperature in the Sunda Strait

Sunda Strait has an important role in the water mass exchange from the Pacific Ocean and the Indian Ocean so that the oceanographic condition is strongly affected by seasonal factors. The purpose of this study is to observe the relationship and the characteristics of significant wave height (SWH) and sea surface temperature (SST) in the Sunda strait and its relationship with IOD. The method employed is spatial analysis, low-pass filter, and spectrum analysis by S-Transform, beside that the correlation between SST and SWH is analyzed by wavelet coherency. The period of SWH and SST is dominantly semiannual, at the time of winter monsoon (the Northeast Monsoon), the SWH was reaching up to 2,11 m, while at the summer monsoon, the SWH was reaching up to 3.62 m. Reversely, the SST increased during the winter monsoon. At the time of 2016 had been detecting by the negative IOD with the IOD index of -0.65 and it caused the SWH increased by 0.3 m than its average. Based on the wavelet coherence, the SWH and the SST have the coherence in the period of 8 to 16 days, especially in March to April, and June to August

Dampak Pemberian Pendidikan Kesehatan Reproduksi terhadap Pengetahuan Sikap dan Praktek Santri Pondok Pesantren di Semarang

Background : Adolescene is a priode of transition signed by physical, emotional and psychological changes, which occurred maturation of human reproductive organs (puberty). Santri in islamic boarding are teenagers that in growth is often accompanied by juvenile common problems such as physical changes, social adjustment, and issues relating to the opposite sex. This condition is exacerbated by the globalization that is characterized by increasingly the flow of information, which is the relationship behavior that is not healthy tends the teenager doing premarital sex, including santri. Survey Perkumpulan Keluarga Berencana Indonesia (PKBI) in Semarang in 2010 about reproductive health showed 43,22% their knowledge are low and 63% of teenagers who are dating is not ashamed to do petting. The purpose of this study is to determine the impact of giving the education of reproductive health towards knowledge, attitude and practice of santri in islamic boarding in Semarang.Method : This research is a kind of pre-experimental study with static group comparison approach. The population in this research is the santri of MA Nurul Huda Azzuhdi 174 people then the samples were taken by 50 santri using proportional stratified random sampling method. The data analyzed by T-test, Mann Whitney and Crosstab.Result : The result showed that 66% og santri knowledge are “less”, 40% their attitude are “permissive”, and 24% their practice are “high risk”. Then the result of statistical test T-test showed the difference between knowledge of santri in islamic boarding intervention and control with value of p=0,001. While Mann Whitney statistical test results showed no difference between the attitude and practice of santri in islamic boarding intervention and control, each with value of p=0,111 and p=0,057. In the Crosstab statistical test results showed difference between the attitude og the santri of the man and the woman with value of p=0,001, while the knowledge and practice there is no difference with value of p=0,232 and p=0,321.Conclusions : From this study it can be conclude that the reproductive health education that is given, impacted significant in changing the knowledge, but can not increase the knowledge good enough, and less significant in changing the attitude and practice og santri

Extensive examination of sonication duration impact on stability of Al2O3-Polyol ester nanolubricant

The sonication technique is one of the effective methods to stabilize nanolubricants. This paper aims to elaborate on the sonication duration’s impact on the stability of Al2O3-Polyol ester nanolubricants. A two-step method has been performed to prepare nanolubricants. Each sample consisted of a nanoparticle mixed with POE using a magnetic stirrer without surfactant for 30 min. All samples had the same volume concentration, namely 0.02 vol % but received different interlude sonication duration treatments for 0, 40, 60, 80, 100, and 120 min. FESEM with Energy Dispersive X-Ray was used to characterize the Al2O3 nanoparticle sample’s morphology and element analysis. UV Visible and absolute zeta potential were used to determine Al2O3-POE nanolubricants stability. The findings show that the most optimal sonication impact in this study is 80-min sonication. It proofed by the highest absorbance ratio among other samples, which is 0.411, the lowest drop absorbance value, which is 58.9%, and and with a zeta potential value of 45 mV. The rheological behavior analysis shows that Al2O3-POE nanolubricants show Newtonian behavior

Experimental investigation on combustion behaviour, performance and emission of fusel oil-gasoline blends using turbocharged SI engine

Because of rising energy demand and pollution concerns in the transportation and industrial sectors, alternative fuel development is critical. The fusel oil, which is a by-product of ethanol distillation molasses, is receiving a lot of interest. The combustion characteristics, performance, and emissions of a 1.8L turbocharged four-cylinder, port injection, spark-ignition engine will be used to compare fusel oil blends with gasoline in this study. The experiment was carried out at a constant engine speed of 2000 rpm with a throttle load of 10-40%. Four samples with various ratios of gasoline combined with fusel oil were tested (100% gasoline, 10%, 20%, and 30% are referred to as F0, F10, F20, and F30 respectively). As a result, compared to gasoline, fusel oil blends increase Brake Specific Fuel Consumption (BSFC) by 5-22%. In comparison to gasoline, the combustion behaviour of in-cylinder pressure, Rate of Heat Release (ROHR), Rate Of Pressure Rise (ROPR), and Mass Fraction Burn (MFB) shows an early 2-3 Degree Crank Angle (CAD). Due to differences in attributes and oxygen content, the Brake Thermal Efficiency (BTE) of combustion utilising fusel oil blends suffers a modest drop of 13-16%. When compared to gasoline, fusel oil blends emit 3-4% less hydrocarbon (HC), 7.5-24.5% less carbon monoxide (CO), and 18-36% less nitrogen oxide (NOx). To summarise, fusel oil blends without water extraction blended with gasoline have a substantial impact on turbocharger engine functioning