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INDONESIA
BERKALA FISIKA
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Physics
BERKALA FISIKA adalah jurnal saintifik yang diterbitkan secara periodik 3 bulanan. Jurnal ini memuat kajian-kajian Fisika baik kajian teoretik maupun hasil eksperimen. Jurnal ini juga memberi ruang yang luas bagi kajian – kajian aplikasi fisika dalam bidang teknologi, ilmu-ilmu hayati dan kedokteran.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 13, No 3 (2010): Berkala Fisika" : 5 Documents clear
Analisis Distribusi Suhu Aksial Teras Dan Penentuan keff PLTN Pebble Bed Modular Reactor (PMBR) 10 MWE Menggunakan Metode MCNP 5 Setiyo, Agung; Munir, Mohamad
BERKALA FISIKA Vol 13, No 3 (2010): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

The axial temperature distribution and effective multiplication factor (Keff) for PBMR 10 MWe which used uranium dioxside (UO2) as fuel, graphite as moderator, and helium (He) gas as cooler with heterogenous reactor design which used geometry of reactor core finite cylinder has been investigated. The axial temperature distribution of reactor core analysized by splitting core reactor become 57 layers axially and every layer has height 14,9 cm. Keff of reactor  calculated by MCNP 5 with fuel enrichment variation from 7 to 10% and variation range 0,5%. The result shows that reactor in critical condition with fuel enrichment 8,6% and average temperature of reactor core is 893,635 K.   Keywords: PBMR, MCNP, Temperature distribution, Keff
Pemodelan Struktur Pori Dari Batuan Geologi Dengan Fractal Ferani, S
BERKALA FISIKA Vol 13, No 3 (2010): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Has done modeling with fractal pore structure and fracture of geology rock. Sun and Koch (1998)[2] states that the geological formations of porous rock has a fractal nature ..Modeling the generated fractal porous media have been carried out, which generated fractal modeling has the potential high enough to be able to model the porous media, although the modeling parameters require optimization in order to generate fractal porous media a valid model with actual data. The studied rock samples taken from surface rock formations Parigi Cirebon, West Java. Fractal model is then validated by optimizing the parameters that appear in the modeling for valid with the data of rock that can be estimated by image analysis.   Key words: fractal, models, rock geology
Rancang Bangun Deteksi Alkohol Pada Urine Dengan Sensor TGS 2620 Berbasis Mikrokontroler AT89S51 Sutanto, Heri; Haryowati, Anggraeni Dwi; Arifin, Zainal
BERKALA FISIKA Vol 13, No 3 (2010): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

The design of alcohol detection in urine using sensors TGS 2620 microcontroller AT89S51 has been done. This device is made with a system that is simple and affordable prices so that it can be used for police and medical laboratories. Alcohol detection in urine is done by using sensors TGS 2620, ADC and the microcontroller. Measured values of the sensor are converted by the ADC and then processed microcontroller to be processed and sent to a computer with RS 232 modules. From the results of engineering manufacture alcohol detection devices in urine obtained test results showing that an increase in the value of sensor output voltage (VRL) at the time the sensor detects the presence of alcohol and research results of alcohol in urine is shown with captions positive or negative urine samples and the percentage content of alcohol .   Keywords: Alcohol, Urine, Sensors TGS 2620, Microcontroller AT89S51.
Optimasi Tungku Sekam Skala Industri Kecil Dengan Sistem Boiler Nawafi, F; Puspita, D; Desna, Desna; Irzaman, Irzaman
BERKALA FISIKA Vol 13, No 3 (2010): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Rice husk furnace  is a technology based on local wisdom to anticipate threats crisis energy. At first investigated husk stoves for cooking only in the scale of the household, but today rice husk furnace developed for industrial scale because of the importance of commercial aspects of a very promising from this rice husk furnace. In rice husk furnace also developed an industrial scale boiler system, boiler systems where it can enlarge its efficiency, in the midst of a boiler chimney pots have used, because basically rice husk furnace process is influenced by air flow. Husk furnace efficiency greatly affect the number of furnace ash which is required in the cooking process.   Keywords: rice husk, rice husk furnaces, air flow, efficiency, boilers.
Studi Peningkatan Output Modul Surya Dengan Menggunakan Reflektor Sidopekso, Satwiko; Febtiwiyanti, Anita Eka
BERKALA FISIKA Vol 13, No 3 (2010): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Efforts to optimize the power output of solar modules using a mirror. In this study used 2 pieces of flat mirrors as solar reflectors mounted on the right and left of the solar module. Measurement is done by directing the position of solar modules in order to obtain optimum results with a corner reflector 50 0, 600, 700. Based on the measurement results, we obtained at maximum power cost solar modules using the corner reflector 600. The increase in power output compared to 92.7% without using a reflector.   Keywords:  reflector, solar module, output power

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