Geothermal Reservoir Characterization for Steam Field Management in Kamojang Geothermal Field-West Java

Kamojang is the first geothermal field in Indonesia with a vapor dominated system reservoir. Kamojang has been exploited for over 20 years producing about 1100 tons/hour of steam which is equivalent to 140 Mwe electricity energy. This research is aimed to study the reservoir character after 20 years of exploitation and to investigate the effect of reinjection as a artificial recharge for steam input in the future and also the nature of secondary processes in the reservoir using isotope geochemistry tools. The research is conducted by natural isotopes (18O, 2H and 3H) analysis of many sources of water (meteoric, cold spring, fumaroles and shallow groundwater) in the surrounding of Kamojang field and also fluid reservoir to establish fluid reservoir origins and isotopic composition. Gas analysis and isotopes monitoring on the 25 production wells have been conducted every 2-3 years intervals for more than 10 years to investigate the effect of exploitation to the reservoir performance. Tritium radiotracer test with 370 GBq (10 Ci) activity was conducted at the KMJ 15 reinjection well to determine qualitatively and quantitatively the flow of reinjection water to its surrounding producing well (KMJ 11, 14, 17, 18, 26, 17 and 30). Data interpretation and evaluation to determine reinjection water mass recovery and cooling prediction modeling were conducted using ICEBOX program package (TRINV and TRCOOL). Interpretation and evaluation of data concluded that reservoir fluid of Kamojang geothermal field was originated from meteoric water which infiltrated through fault structures at elevation of 1350 m –1650 m above sea level. There is no evidence that the fluid was originated from magmatic water. Reservoir fluid moved both laterally and vertically (deep fluid) with lateral fluid movement from west to the east. The isotope data analysis indicated there is water entry in west-northwest reservoir boundary. Water entry gradually moved from northwest to the southeast (through wells of KMJ 42, 40, 27, 26 and 28). Exploitation effect to ten of the observation wells shows a decrease in w/r ratio and liquid saturation from 35 % in the beginning to about 20,5 % on the average after 20 years of operation. Evaluation with TRINV and TRCOOL program shows that 13,5 % of water reinjected into KMJ 15 reinjection well was recovered in the surrounding production wells. The program model of the reservoir temperature cooling shows that water reinjection with flow rate of 10 kg/sec is very save. After 20 years of reinjection activity, the model predicts a production wells will be cooling of about 6.8oC.Received: 15 January 2009; Revised: 1 May 2009; Accepted: 5 May 200

Pengaruh Intellectual Capital terhadap Kinerja Keuangan Perusahaan

This study aims to analyze and provide empirical evidence of the influence ofintellectual capital to company's financial performance. Hypothesis (1) Intellectual Capital affect to company's financial performance, (2) Intellectual Capital positively affect company's financial performance for upcoming year.This study uses secondary data to the entire population of banks and insurance companies listed in Indonesia Stock Exchange (IDX) 2011-2013. The method used to determine study sample was purposive sampling method, in order to obtain 114 sample companies, which each year is composed of 38 companies. The method of analysis used in this study is Partial Least Square (PLS).The result shows that intellectual capital have effect to company's financial performance and company's financial performance for upcoming yea

Geothermal Reservoir Characterization for Steam Field Management in Kamojang Geothermal Field-West Java

Kamojang is the first geothermal field in Indonesia with a vapor dominated system reservoir. Kamojang has been exploited for over 20 years producing about 1100 tons/hour of steam which is equivalent to 140 Mwe electricity energy. This research is aimed to study the reservoir character after 20 years of exploitation and to investigate the effect of reinjection as a artificial recharge for steam input in the future and also the nature of secondary processes in the reservoir using isotope geochemistry tools. The research is conducted by natural isotopes (18O, 2H and 3H) analysis of many sources of water (meteoric, cold spring, fumaroles and shallow groundwater) in the surrounding of Kamojang field and also fluid reservoir to establish fluid reservoir origins and isotopic composition. Gas analysis and isotopes monitoring on the 25 production wells have been conducted every 2-3 years intervals for more than 10 years to investigate the effect of exploitation to the reservoir performance. Tritium radiotracer test with 370 GBq (10 Ci) activity was conducted at the KMJ 15 reinjection well to determine qualitatively and quantitatively the flow of reinjection water to its surrounding producing well (KMJ 11, 14, 17, 18, 26, 17 and 30). Data interpretation and evaluation to determine reinjection water mass recovery and cooling prediction modeling were conducted using ICEBOX program package (TRINV and TRCOOL). Interpretation and evaluation of data concluded that reservoir fluid of Kamojang geothermal field was originated from meteoric water which infiltrated through fault structures at elevation of 1350 m –1650 m above sea level. There is no evidence that the fluid was originated from magmatic water. Reservoir fluid moved both laterally and vertically (deep fluid) with lateral fluid movement from west to the east. The isotope data analysis indicated there is water entry in west-northwest reservoir boundary. Water entry gradually moved from northwest to the southeast (through wells of KMJ 42, 40, 27, 26 and 28). Exploitation effect to ten of the observation wells shows a decrease in w/r ratio and liquid saturation from 35 % in the beginning to about 20,5 % on the average after 20 years of operation. Evaluation with TRINV and TRCOOL program shows that 13,5 % of water reinjected into KMJ 15 reinjection well was recovered in the surrounding production wells. The program model of the reservoir temperature cooling shows that water reinjection with flow rate of 10 kg/sec is very save. After 20 years of reinjection activity, the model predicts a production wells will be cooling of about 6.8oC.Received: 15 January 2009; Revised: 1 May 2009; Accepted: 5 May 200

Pengaruh Gaya Kepemimpinan terhadap Stres Kerja Anggota Polri Divisi PROPAM Polda Jawa Barat

Penelitian kali ini dilakukan pada anggota Polri Divisi PROPAM Polda Jawa Barat, dengan total responden berjumlah 150. Metode sampling yang digunakan selama penelitian adalah nonprobability sampling dengan teknik convenience sampling. Metode penyebaran data dilakukan dengan cara penyebaran kuesioner secara manual kepada seluruh anggota Polri di Divisi PROPAM sebanyak 35 item pernyataan. Skala pengukuran yang digunakan pada penelitian adalah skala likert lima titik. Metode yang digunakan untuk mengolah data dan menjelaskan hasil penelitian ini menggunakan analisis regresi linier sederhana dan analisis deskriptif. Hasil dari penelitian ini adalah gaya kepemimpinan yang diterapkan di Divisi PROPAM adalah gaya kepemimpinan direktif dan tergolong kuat dengan tingkat stres kerja tergolong sedang. Sehingga dapat disimpulkan bahwa gaya kepemimpinan berpengaruh secara signifikan negatif terhadap stres kerja anggota Polri Divisi PROPAM Polda Jawa Barat

Pengaruh Motivasi Kerja, Budaya Organisasi dan Kompetensi Kerja terhadap Kinerja Pegawai di Bagian Keuangan SKPD Pemerintahan Provinsi Riau

This study aims to examine the influence for work motivation , organizational culture and workplace competencies to employee performance with the object of research personnel at the Riau Provincial Government on education finance . The sampling method using purposive sampling techniques and sample penerikan using Slovin formula with 10% error level . The author conducted research based data retrieval techniques through questionnaires . Analysis of the data that I use is besifat Quantitative analyzes of data through multiple linear regression equation with t test and test persial R2dan collected data is processed with the help of the statistical program SPSS 17.0 . The results were obtained as a partial conclusion that three variables t ( 2.920 , 26.103 , and 2.901 ) to 3 variables showed t is greater than t table . It was concluded that all three variabel ( work motivation , organizational culture and workplace competencies ) in this study affect the performance of employees . Furthermore, seen from the determination of test where a R value of 0.937 and R2 of 0873 or 87.3 % . independent variables affect the dependent variable, was 12.7 % influenced by other variables .Keywords : Performance , work motivation , and Organizational Culture Competenc

Potential Hazard Analysis Profession Radiographer at Demak Hospital

Background: Potential hazards and risks in the workplace is the result of work systems or work processes, the use of machinery, equipment and ingredients are sourced from the limitations of his work. From the results of preliminary observations at the Hospital of Pelita Anugerah Mranggen Demak, researchers found several cases of work-related accidents in Radiology which are not recorded during this time. This study aimed to describe the potential hazards and risk values OSH and provide recommendations on the control of hazards in accordance with the standards. Methods: This study is a qualitative research with cross sectional approach. Subjects in this study consisted of 6 people technologist as key informants, 1 Chamber Head and 1 Chief of Radiology as an informer of existing support. The research variables are potential hazards, risks and value of the profession radiologist.Results: Control of danger that has been done in Radiology not meet the standards. Hazard control physics obtained is done using film badge and hide behind the veil of coated lead every task and biological hazards by wearing a mask and handscoon which then wash your hands after handling patient. Conclusion: The danger of physical and biological control are performed at the Hospital Radiology Pelita Anugerah Mranggen Demak not meet the standards, while for chemical hazards and ergonomic hazard control has not been done