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INDONESIA
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)
Published by Universitas Negeri Jakarta
ISSN : 23021829     EISSN : 24769398     DOI : https://doi.org/10.21009/03
Core Subject : Science, Education, Engineering,
Electrical & Electronics Engineering Energy Physics Other
Focus and Scope: Physics education Physics Instrumentation and Computation Material Physics Medical Physics and Biophysics Physics of Earth and Space Physics Theory, Particle, and Nuclear Environmental Physics and Renewable Energy
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 976 Documents
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PENENTUAN KORELASI EMPIRIS LOKAL PERPINDAHAN PANAS PADA BAGIAN SEKTOR ELLIPS MODEL SUNGKUP AP1000 Nanang Triagung Edi Hermawan
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 1 (2012): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2012
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Nuclear reactor technology is one application of the theory of nuclear physics by usingenergy generates from fission reaction in nuclear fuel. AP1000 reactor design applies containment surface cooling by natural air flow. Air flows at inner gap from bottom of concentric cylindrical ellipse sector part to upper of containment surface. Heat transfer characteristic on ellipse sector is very important to be known because in this part heat accumulation from cylindrical heat transfer is happened. Natural convection heat transfer could be represented by empirical correlation equation. Experimental studies have been done on AP1000 containment model proportion 1:40. The result of the experiment indicates that containment surface cooling in accident scenario couldbe happened optimally. Average temperatureof the outer surface of containment is 55.82 0C (well below re-crystallization point for SS-304, which is about 900 0C). The local empirical correlation from this experiment is Nux = 0,577Ra*0,2532, for Rayleigh numbers 7,51 x 105< Ra* < 7,08 x 1010. Keywords: AP1000 reactor, containment cooling, ellipse sector, and empirical correlation.
KARAKTERISASI SENSOR MAGNETIK FLUXGATE KUMPARAN SEKUNDER GANDA MENGGUNAKAN ELEMEN SENSOR MULTICORE Widyaningrum Indrasari; Mitra Djamal; Umiatin Umiatin
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 1 (2012): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2012
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Fluxgate is a magnetic sensor that capable to measure the magnetic field in a very small order. The basic principle of the fluxgate sensor is by comparing the measured magnetic field with the magnetic field reference. In this paper, we describe the characterization of fluxgate magnetic sensor using the double secondary coil design. Configuration of primary coil winding and secondary coil that be used is 4x40 and 2x60. We use vitrovacs 6025Z (1.5 mm width and 0.025 mm thick) as the sensor core. Sensor characterization with varying amounts of the core layer is made to determine the influence of the core layer to the demagnetization factor and the sensor sensitivity. The demagnetization factor is performed by measuring the dimensions of the sensor element and the inductance of the sensor. The inductance of the sensor is measured using a LCR meter GW Instek 829 series at a frequency of 10 kHz. The calculation results show that the increasing amounts of the vitrovac core layer is proportional to the demagnetization factor. To determine the sensor sensitivity, sensor calibration is performed by giving the external field on the calibration coil in a faraday chamber. From the sensor calibration we get the relationship between the external fields with the sensor output voltage. Based on this relationship, we can calculate the sensor sensitivity in working range ± 4 μT. Sensor sensitivity is inversely proportional to the amounts of vitrovac core layer. Sensor with 2 vitrovac core layers has the highest sensitivity (641 mV / μT), and has the smallest absolute error (0.1 at the point of 3.87 μT). Keywords: fluxgate, external field, vitrovac, sensitivity, demagnetization factor, inductance.
EKSTRAKSI MINYAK NABATI DARI SCENEDESMUS SP. MENGGUNAKAN GELOMBANG MIKRO Linda Septiyaningsih; Satwiko Sidopekso; Noor Fachrizal
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 1 (2012): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2012
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Microalgae is one of the raw material for biodiesel. Types of microalgae that used in this research is Scenedessmus Sp. because it has a high content of vegetable oils. Solution of microalgae used do not need to be dried first. It aims to keep the microalgae cells from damage and keeping the lipid content contained in its. Extraction of vegetable oil and microalgae Scenedessmus Sp. used Microwave Assisted Process method. The sample solution Scenedessmus Sp. used 200 mL for the extraction of vegetable oils from microalgae is 380 Watt and the variation time are 2, 3, and 4 minutes. The results showed microalgae cells burst after the extraction so that it can be concluded that the microwaves are used to extract vegetable oil from microalgae. Keywords: minyak nabati, microalgae, Scenedesmus sp., microwave assisted process.
EKSTRAKSI MINYAK NABATI DARI MIKROALGA SCENEDESSMUS SP. MENGGUNAKAN GELOMBANG ULTRASONIK Wulan Ari Kristanti; Satwiko S; Noor Fachrizal
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 1 (2012): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2012
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Microalgae is a fuel substitute for oil, have potential to produce vegetable oil far beyond the content of other commodities. The most effective microalgae is CO2 absorbent, so it can be integrated with a system that emits CO2. Ultrasonic extraction method does not involve chemicals, and is used for the extraction of relevant microalgae. This method can also be integrated with non-traditional breeding system, making it more effective and controllable. Expected results of these activities can be a starting point the development of algae as a substitute for fuel oil and can be used to assist the Government in addressing the problem of energy crisis and fuel needs in Indonesia. Keywords: microalgae, extraction, ultrasonic.
PENGARUH KONSENTRASI LARUTAN EKSTRAK DAUN LIDAH MERTUA TERHADAP ABSORBANSI DAN TRANSMITANSI PADA LAPISAN TIPIS Sunardi Sunardi; Kartika Sari
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 1 (2012): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2012
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

It has done research on the effect of the extract solution concentration in-law tongue (Sansevieriatrifasciata) on the absorbance and transmittance in thin layers. Experimental research is that by extracting the leaves of the tongue-in-law to obtain a dye. Then made a solution with a concentration of 1%, 2%, 3%, 4%, 5%, 6% and7%, and also made merua pure aloe extract solution, a solution of TiO 2, and a mixture of both. Characterization of a solution made with UV-Vis spectrometer 1800 which aims to determine the value of absorbance and transmittance. Spectrometer set at a wavelength of 411nm- 665 nm and an absorbance range 0-3. The results show that there is a relationship between the concentration of the absorbance by the equation A = 22,9c + 0.1946. The greater the concentration used, the greater the smaller the value of absorbance and transmittance values. The maximum absorbance obtained at a wavelength λ = 411 nm and λ = 665 nm while the absorbance value and the maximum trasmitansi respectively 3,58 and 1,433. . Key words:leaf extract in-law tongue (Sansevieriatrifasciata), absorbance, transmittance.
FABRIKASI DAN KARAKTERISASI SIFAT MEKANIK SERAT DAUN LIDAH MERTUA DENGAN MATRIK EPOKSI RESIN SEBAGAI FIBERGLASS Kartika Sari
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 1 (2012): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2012
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

The technology is made from fiberglass for polycarbonate production process has the disadvantage of expensive, environmentally unfriendly and not able to absorb some heat intensity. Though fiberglass materials can now be based on organic materials that are environmentally friendly and easy to obtain. One is the leaf fibers of the tongue-in-law. Fabrication and characterization of the mechanical properties of fiber-matrix leaves the tongue-in-law with an epoxy resin as fiberglass conducted to determine the mechanical properties or mechanical properties (compressive strength, tensile strength and impact) of the resulting composite material. In this paper we will discuss the compressive strength and tensile strength of fiber composite material that leaves the tongue-in-law berfiller. Composite specimens made with the two treatments, namely variations in the composition of leaf fibers and matrix as well as tongue-in-law variation of the thickness of the resulting composite material. Variation of the composition of leaf fibers and the matrix is made tongue-in-law with a ratio of 0%: 100%, 20%: 80%, 35%: 65% and 50%: 50%, while the variation in thickness is 2 mm and 3 mm. The results showed that the addition of leaf fibers of the tongue-in-law and the resulting thickness variations can affect the compressive strength and tensile strength of the composite material. On the compressive strength tests obtained from a thickness of 2 mm is obtained for 128.63 MPa and a thickness of 3 mm at 80 MPa, whereas for the fiberglass on the market obtained compressive strength 36.2 MPa. Compressive strength will be reduced if the thickness of the composite increases and increases with the increasing changes in the ratio between the volume fraction of fibers leaves the tongue-in-law and epoxy resin. For tensile strength test on the composite thickness of 2 mm is obtained for 39.4 MPa and a thickness of 3 mm at 89.6 MPa. The resulting tensile strength increases when the thickness of the composite and the volume fraction ratio increases. This is because the nature of the leaf fibers of the tongue-in-law who has a small and delicate form, so that with increasing fiber volume fraction ratio leaves the tongue-in-law with an epoxy resin can increase the compressive strength and tensile strength composite materials. Based on the analysis of compressive strength and tensile strength can be concluded that the fiber-based composite materials Duan tongue-in-law as a filler and epoxy resin as a matrix that is generated can be used as an alternative to the manufacture of fiberglass because it has a compressive strength and tensile strength greaterthan the thickness of the thinner fiberglass manufacturer. Keywords: composites, leaf tongue-in-law, compressive strength, tensile strength, fiberglass.
KAJIAN PEMBENTUKAN KARBON AKTIF BERBAHAN ARANG TEMPURUNG KELAPA Esmar Budi; Hadi Nasbey; Setia Budi; Erfan Handoko; Puji Suharmanto; Ranggi Sinansari; Sunaryo Sunaryo
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 1 (2012): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2012
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

The early study on preparation, process and characterization of activated carbon from coconut shell charcoal has being done to achieve the optimum activated carbon performance. The preparation involved cleaning, drying and sequent sieving and heat treatment. The coconut shell was pyrolyzed at temperature about 70 – 1000C for about 6 hours. The coconut shell charcoal then was sieved once to produce rough powder while finer powder was achieved by twice sieving. SEM analysis result showed that the coconut shell charcoal morphology has pore structure in about micro size. From EDS analysis, the major element content of charcoal was carbon C (82.92 %wt). From PSA analysis, it showed that differential volume of rough charcoal powder was distributed into 5.610 – 6.760 µm (41.14 %) and 15.65 – 17.18 µm (32.83%) while finer charcoal powder was distributed into 0.452 – 3.519 µm (99,77%). Keywords: Coconut shell charcoal, pyrolysis, activated carbon, pore.
PENGGUNAAN MEMBRAN KERAMIK BERBASIS ZEOLIT DAN CLAY DENGAN KARBON AKTIF SEBAGAI ADITIF UNTUK PENURUNAN KADAR FE DAN MN PADA AIR TANAH DAERAH BEKASI Jevita Andini J. Ginting; Agus Setyo Budi; Esmar Budi
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 1 (2012): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2012
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

Scarcity of water in major cities has given many problems to ground water reserves. Way that is widely used in water treatment are filtration using membrane technology. Membrane technology has several advantages, such as: the separation process can occur at room temperature and non destructive using. Membrane is a selective barrier between two phases (Fauzan, 2009). This research will make membrane with zeolit, clay and activated carbon as the basic material as aditive in the filtration process. The research focused on a membrane filtration process. Based on AAS result for groundwater that tested by membranes, we can conclude that membrane based on zeolith and clay with activated carbon as aditive can reduce the concentrartion of Fe and Mn in groundwater that taken from Bekasi. The highest Fe concentration reduction is about 49,59% and the highest Mn concentration reduction is about 56,21 %. Keywords: Membrane, Zeolite, Clay, Activated Carbon, Water Quality.
TEKNOLOGI PENDEPOSISIAN FILM TIPIS METAL DENGAN METODE DC-SPUTTERING Selamet Widodo
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 1 (2012): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2012
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

In this paper described the results of testing and measurement of film thickness for target deposition Copper (Cu), Nickel-chromium (Ni-Cr) using DC-Sputtering, and shown a strong correlation between film thickness with time deposition by sputtering systems which are linear for each type of target. Characteristic curve is also shown on the pressure conditions of argon (Ar) constant, increasing the value of power from the starting 100 to 300 watts causes deposition while the value added to value of speeds from 350 to 450 watts, the value increased deposition nearly constant speed. And at constant power conditions, the addition of argon gas pressure (Ar) decreases the value deposition speed. By comparing each characteristic curve at the same pressure and power, connection speed deposition value comparison for each type of target are: Copper (Cu)> Nickel-chromium (Ni-Cr). Keywords: Deposition, Cu, Cr, Ni-Cr, DC-Sputtering.
TEKNIK PELAPISAN SILIKON DIOKSIDA (SiO2) DENGAN ALAT RF-SPUTTERING ARC-12M Slamet Widodo
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 1 (2012): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2012
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Abstract

In this paper described the technique of metal and non metal coating (Alloy) by using a sputtering ARC-12M. Sputtering is a process ejected material from a surface of solids or liquids due to ground by high-energy particles up to momentum exchange occurs (momentum exchange). Target in the form of coating material is placed in the same direction with the substrate in a vacuum chamber with initial pressure (base pressure) equal to 5x10-4 to 5x10-7torr. Types of particles that were fired from the gas ions that are not easy to react to other substances or inert gas. On Non-metal deposition process (Alloy) eg Silicon Dioxide (SiO2) by RF-sputtering method, the thickness would increase linearly with increasing time.The deposition of chromium (Cr) with Argon (Ar) gas at a pressure of 15 mTorr, it produce relatively higher than the pressure of 25 mTorr. Keywords :Deposition, SiO2, RF Sputtering ARC-12M.

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