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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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PENGARUH TEKANAN ANISOTROPIK PADA BINTANG NEUTRON A. M. Setiawan; A. Sulaksono
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (622.398 KB) | DOI: 10.21009/0305020503

Abstract

We investigate the anisotropic factor σ of neutron stars based on the Doneva-Yazadjiev (DY), Herrera-Barreto (HB), and Bowers-Liang (BL) anisotropic models. We assume that the neutron stars matter consist of nucleons, leptons, and hyperons. We obtain that the corresponding models predict neutron stars maximum mass consistent with PSR J1614-2230 and PSR J0348+0432. Keywords: Hyperon, Neutron Stars, and Anisotropic Pressure.
ANALISIS DAN VISUALISASI PERSAMAAN KLEIN-GORDON PADA ELEKTRON DALAM SUMUR POTENSIAL DENGAN MENGGUNAKAN PROGRAM MATHEMATIC 10 Syahrul Humaidi; Tua Raja Simbolon; Russell Ong; Widya Nazri Afrida
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (783.23 KB) | DOI: 10.21009/0305020504

Abstract

Schrödinger equation is a wave equation that describes the behaviour of an electron including determining its energy levels. However, when the motion of electrons was assumed as relativistic motion(vc), then the schrödinger equation must be changed into Klein-Gordon equation(relativistic Schrödinger equation). In order to compare both equations, we analyzed and visualized the Klein-Gordon equation for an electron in a potential well with Wolfram Mathematica 10 software. The visualization from Mathematica 10 gave the same wavefunction graphs and probability density graphs as the Schrödinger equation. The difference is only in the visualization of energy levels graphs. Keywords:Klein-Gordon equation, Mathematica 10, electron, energy levels.
KOMPAKTIFIKASI 𝒅𝑺𝟒×𝑺𝟐 MENGGUNAKAN LAGRANGIAN MEDAN SKALAR DENGAN SUKU KINETIK POWER LAW Fima Ardianto Putra
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (746.911 KB) | DOI: 10.21009/0305020505

Abstract

Compactification of 5-D extradimension using Power Law has been successfull in compactifying one extradimension, and obtainning it’s radius and stability information. Nevertheless, from this study, we obtained Anti-de Sitter (AdS) in four dimensional viewpoint. This confirms that the Lagrangian model which are choosen has not yet been compatible with respect to the Lagrangian of our space where we are. Kata Kunci: Campactification, Power Law, dan Anti-de Sitter (AdS).
KOMPARASI TINGKAT KEASAMAN PADA KOPI ARABIKA, KOPI LUWAK DAN KOPI HASIL IRADIASI BATAN Jepri Sutanto; Musaddiq Musbach; Achmad Suntoro
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (729.273 KB) | DOI: 10.21009/0305020506

Abstract

Coffee is one of the most consumed beverages in the world. In this experiment will determine the level of acidity in Arabica coffee (Toraja), Civet coffee (Gayo), and irradiation coffee from National Nuclear Energy Agency (BATAN). The difference of acidity before and after irradiation is carried out by measuring the cup of coffee at temperature 600C to 250C using pH meter PM 6-Dr.A.KUNTZE GmbH. Irradiator technology is used to eradicate the insects, inactivate pathogenic microorganisms, and to eliminate all other bacterial pathogens in coffee. In accordance with the recommendations PERMENKES 701/Menkes/PER/VIII/2009, CODEC STAN 106-1983, REV.1-2003, and SNI 01.2907:2008, 10 kGy doses is conducted to irradiate of coffee. Differentiation of the acidity levels before and after irradiation for arabica coffee and civet coffee are 2.76% and 3.09%. The results of the measurement (4 samples), the acidity of Arabica coffee (Toraja) 5.07, Civet coffee (Gayo) 4.84, irradiation coffee of Arabica (Toraja) 5.21, irradiation coffee of civet (Gayo) 4.99. From the measurement results showed that irradiation coffee from BATAN, the level of acidity is lower than before irradiation. Keywords: coffee, acidity, pH meter, irradiation.
SIFAT MAGNETIK TANAH DAN DAUN SEBAGAI INDIKATOR PENCEMARAN Agum Gumelar Prakoso; Riski Darmasetiawan; Rahma Andini Pratiwi; Bambang Widjatmoko; Kartika Hajar Kirana; Dini Fitriani
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (576.331 KB) | DOI: 10.21009/0305020601

Abstract

Rock magnetism have been conducted on the issue of pollution by vehicle to identify mineral magnetic in the soil surface and leaf samples. Samples taken at PT Perkebunan Nusantara VIII, West Bandung regency. Location of the study is divided into two zones, zone 1 is located close to the highway, and a zone 2 that is located away from the road. In this study magnetic susceptibility measured in two frequencies, low frequency, (0.46 kHz) and high frequency, (4.6 kHz). The measurement results show that the value of the leaf samples ranged, 1Í10-821Í10-8 m3/kg (zone 1), and 1Í10-83Í10-8 m3/kg (zone 2), On the surface soil samples, value from each frequency almost the same range 1200Í10-81700Í10-8 m3/kg (zone 1), and 2600Í10-8 m3/kg2800Í10-8 m3/kg (zone 2). The relative difference of and value will produce (%). The calculation result , (%) is within the range of 2% -4% (zone 1) and 1.4% -1.7% (zone 2). Based on the scheme between and (%), indicating that the zone 1 and zone 2 types of magnetic minerals is more likely as the mineral from the combustion of fossil gas. Keywords: pollution, vehicle pollution, magnetic susceptibility, magnetic grains.
ANALISIS EKSERGI MODUL PV BERDASARKAN SPEKTRUM PANJANG GELOMBANG CAHAYA MATAHARI Dadan Hamdani; Lambang Subagio
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (813.484 KB) | DOI: 10.21009/0305020602

Abstract

PV modul performance can be evaluated in terms both energy and exergy based on wavelengths spectrum of the sun method, which take into account the contribution of chemical potential in term photonic energy and exergy corresponding to photonic energy of a PV module during tested (09:00 – 15:00). Based on this method, it is found that effect of wavelength of visible spectrum (300 – 800 nm) is essential on the PV performance and as the result of this evaluation is photonic energy higher than photonic exergy due to the irreversibilities of the real process. Keywords : energy and exergy, wavelengths spectrum, PV module , photonic, irreversibilities.
PEREDAM PANAS PADA ATAP ALUMUNIUM DENGAN MENGGUNAKAN SPONS AIR Husna Noor Mufida; Muh Syukri Ahsani; Masturi Masturi; Ian Yulianti
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (492.091 KB) | DOI: 10.21009/0305020603

Abstract

The use of aluminum roof is already widely used, but leads to the room temperature becomes hot due to the high thermal conductivity. So far the impact of the heat generated is reduced with the installation of plasterboard and make a high roof. In this study, the reduction of heat on the aluminum roof with the installation of a sponge of water flowed. The research objective to reduce the temperature in the room because the water has a high specific heat. Research carried out by making a miniature model of aluminum-roofed house placed in the middle of the field during the sunny day. The bottom side of the aluminum fitted with a sponge and then underneath waterproof plastic coated (banner MMT). Water flowed slowly to keep the temperature inside the miniature house. The variable that changed was the thickness of the sponge layer. The air temperature measured with a thermometer in the room space and the outside air temperature is measured with an infrared thermometer. Data analysis was done by plotting the relationship between a thick layer of sponge on the temperature inside the miniature house. Results obtained indicating that the air temperature in the house miniature dropped significantly 2 oC-8 oC lower than the outside air temperature. Keywords: roof, aluminum, temperature.
ANALISIS KUAT GESER LANGSUNG TANAH PADA TPA KUDUS YANG TERNORMALISASI Rizka Silviana Hartanti; Masturi Masturi; Ian Yulianti
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (491.279 KB) | DOI: 10.21009/0305020604

Abstract

Final Disposal (TPA) is a disposal of the remains (garbage) activities of residents of organic to inorganic. Trash that has fulfilled the land will be relocated to another place so that the former is called the normalized TPA or the land back to the beginning of the function. The purpose of this study was to determine the direct shear test of TPA in the district of Kudus normalized to determine the water content test and direct shear strength test soil with soil variations normalized landfill and landfill soil that has not been normalized. The method used is to take soil samples tested in the laboratory and continued with retrieval data retrieval. Data were analyzed using 1D graph. Having done the research results that the water content in the TPA normalized ie 34,23% while the landfill soil that has not been normalized with 33,15%. To test the shear strength obtained TPA normalized graph of normal stress to shear stress resulting friction angle value 19,070 and the value of cohesion (c) 8561,7N/m2. To test the shear strength normalized landfill that has not obtained a graph of normal stress to shear stress resulting friction angle value 22,850 and the value of cohesion (c) 6429,9N/m2. Key words: land, landfills (TPA), normalized, direct shear test.
FILTRASI AIR KAPUR DENGAN MEMANFAATKAN KARBON KULIT BUAH KAPUK RANDU DAN ZEOLIT Rosyidatul Munawaroh; Masturi Masturi; Ian Yulianti; Sumarli Sumarli
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (412.848 KB) | DOI: 10.21009/0305020605

Abstract

In rural areas most of people use groundwater for their daily needs. Water in the Tambakromo area, Pati, Central Java is located in the Kendeng Mountains of Limestone Mountain Northern of Central Java contains of lime which can cause problems in the long term. The objective of the research is to make filtration of water untilize of active carbon of kapok randu fruit peels and zeolite. The independent variable in this research is the composition carbon of kapok randu fruit peels and zeolite as a water filter. The dependent variable is physical properties of the water, the water content of lime (Ca(OH)2)/ TDS. The control variable is the rate of flow of water, the water diverted filter water, filter tube diameter and height of the sand. Samples used lime water has TDS 595ppm. The results of the filtration filter 1 to 5 was 557ppm, 549ppm, 467ppm, 444ppm and 585ppm. The composition of carbon filter media and zeolite influence the water filtration result. The absorption of substances dissolved in water are best shown in the filter 4 with composition of 5 cm zeolite and 10 cm carbon able to absorb 25,38% of the substances dissolved. Keywords: lime water, filtration, filter composition.
PENGATURAN ARAH AZIMUTH DAN SUDUT TILT PANEL PHOTOVOLTAIC UNTUK OPTIMALISASI RADIASI MATAHARI, STUDI KASUS: BANDUNG – JAWA BARAT Rudi Darussalam; Ahmad Rajani; Kusnadi Kusnadi; Tinton Dwi Atmaja
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (900.849 KB) | DOI: 10.21009/0305020606

Abstract

This paper discusses about the setup of photovoltaic panel direction (azimuth angle) and angle inclination (tilt angle) which aim to optimize the total solar radiation on tilted surface photovoltaic panel. Setting of azimuth angle and tilt angle in accordance with characteristic location of installation can produce optimum electrical energy. Setting of tilt angle panel varied on 5, 10, 15, 20, 25 and 30° and setting of azimuth angle varied on facing north and facing south using solar radiation data from NASA Surface Meteorology and Solar Energy. This research was conducted in Ciparay, Kabupaten Bandung which is field laboratory hybrid power generation from renewable energy sources. The results of this study found that the optimal tilt angle and azimuth angle are varied between 5 - 10° during October - February with panel facing the south and between 5 - 25° during March – September with panel facing the north. For fixed panel photovoltaic type, the optimal tilt angle is 10° with panel facing to the north. Keywords: photovoltaic, tilt angle, azimuth angle, energy, solar radiation, renewable energy, fixel panel photovoltaic.

Page 21 of 98 | Total Record : 976

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