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PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL)

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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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PENGEMBANGAN FILTER AIR DENGAN BAHAN KERAMIK UNTUK PENINGKATAN KUALITAS AIR SUNGAI Reza Achmad Furqoni; Mahardika Prasetya Aji; Sulhadi Sulhadi
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

Potable water will increasingly scarce with a concomitant increase in population and the natural environmental increasingly difficult to equal this basic requirement. Ironically, research development for potable water is very slow dan its look like not taken seriously. All this time, dempet river in Kabupaten Demak is one of water sources that be used by local people for daily needed. One of option that recommended by Indonesian Ministry of Health (2008) for processing household water consumption is use ceramics filter. Therefore, this research do for knowing effect the ceramics material in water filter to increase quality of potable water. Research start with measure debit and permeability of filter and measure turbidity level of water after it passes the filter. The result of this research showing water filter with ceramics in its basic material is very good for processing potable water in small scale. Keywords: Water Filter, Ceramics Material, Potable Water.

INVESTIGASI KANDUNGAN RADIOISOTOP DALAM SAMPEL AIR PADA SUNGAI DISEKITAR RUMAH SAKIT Reza Achmad Furqoni
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

Nowadays radioactivity utilization is spread, for example in medicine field, agriculture, even used alternative energy from radioactivity element. In medine field, there are more hospitals that used radioactivity as one of way to healing people. This way absolutelly have implication to discarded waste from the hospital itself. Therefore, this research do for knowing radiation interval count dan activity of radioisotop mass then bring it to analyze in laboratory. The result is interval activity of radioisotop mass in sample of water 4,39 xÎ¼Ci/gram â€“ 1,59 xÎ¼Ci/gram. Radioisotop contamination level is in high contamination area for alpha radiation (C > 9,99x Î¼Ci/gram) and mid contamination area for beta (9,99x Î¼Ci/gram â‰¥ C < 99,9x Î¼Ci/gram) in southwest from hospital. Mid contamination area for alpha radiation (0,99 x Î¼Ci/gram â‰¥ C < 9,99x Î¼Ci/gram) and low contamination area for beta (C < 9,99 x Î¼Ci/gram) it spread out in every track of research location. Keywords: Radioisotop Material, River Water, Hospital.

PENGARUH TEGANGAN DC TERHADAP KECEPATAN LINEAR SEL DARAH MANUSIA Nuri Nuri; Ian Yulianti; Eni Wahyuningsih; Ratna Sari; Endang Sawitri
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

Sel darah manusia merupakan kumpulan partikel yang bermuatan listrik, jika sel ini berada dalam medan listrik akan berinteraksi sesuai dengan arah gaya luar yang memprngaruhinya. Sel darah sebagai muatan uji akan bergerk sesuai jenis muatan dan pengaruh kuat medan listrik luar yang mengeninya, semakin dekat jarak muatan uji dengan elektroda maka makin besar pengaruhnya. Dalam penelitian ini sel darah sebagai muatan uji berada pada jarak 2cm daintara dua elektoda positif dan negatif. Seumber kuat medan listrik luar berasal dari elaktroda positif dan negatif. Sebagai variabel bebeas menggunakan perubahan tegangan DC dalam volt dan variable terikat adalah kecepatan sel dalam (pixel/s). Hasil percobaan didapatkan bahwa pada saat belum diberi tegangan sel darah dalam keadaan diam, pada saat nilai tegangan diberikan pada rentang 4V-12V sel darah bergerak pada rentang kecepatan 75pixel/s hingga 600pixel/s dengan arah menuju elektroda positip. Sehingga dapat disimpulkan bahwa perubahan tegngan berpengaruh positif pada kecepatan sel darah manusia, kecepetan sel menuju elektroda positip membuktikan bahwa sel darah manusia tersebut bermuatan negatif. Kata kunci : Tegangan DC, Sel biologi, Home scanning, Kecepatan linear, Elektroda, dan Sel darah.

METODE PERHITUNGAN INTENSITAS REKAHAN BATUAN GEOLOGI 3D MENGGUNAKAN SKELETONISASI Prana F L Tobing; Selly Feranie; Fourier D. E. Latief
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

Fracture plays important role in oil, gas, and geothermal reservoir because it is easier to flow the fluid than the porous medium that form of granules. Fracture intensity is one of the main parameters of fracture that indicate the number of fracture at any length or section. Previous studies of fracture intensity calculation are limited to 2D fracture, the determination of 3D fracture intensity is still not comonly found because its determination method still slightly. Therefore, in this paper we/ve applied skeletonization method to 3D rock fracture. Skeletonization is thickness transformation of sample image composer that represented by the color white in the image (pixel with â€œ1â€ value in the binary image) into a new image with the thickness of white is 1 pixel. Skeletonization usually used to characterize the length of binary image in digital image analysis. Rock fracture sampel in this paper were drawn for Kamojang Geothermal Area in cube form with side 3.5 cm. The sample has been applied in 3 different temperature condition i.e. room temperature (24Â° C), 300Â° C, and 600Â° C. The fracture intensity which has calculated in each temperature condition respectively are 2.995Ã—10-3 cm-2, 3.160Ã—10-3 cm-2, and 3.850Ã—10-3 cm-2. These result indicate that the increasing of temperature not only make the new fractures, it also causes the propagation of old fractures so that fracture intensity increases. These result are appropriate with the thoery of temperature effect on forming fracture. Thus, skeletonization method can be an alternative for calculation of 3D fracture intensity. Keywords: fracture, binary image, skeletonization.

IDENTIFIKASI SIFAT MAGNETIK TANAH DI DAERAH TANAH LONGSOR Rahma Andini Pratiwi; Agum Gumelar Prakoso; Riski Darmasetiawan; Eleonora Agustine; 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

A research has been conducted to identified magnetic properties of soil in landslides area. Soil samples had taken in two areas, area A located in landslides area and area B has not experienced landslides. We have identify magnetic parameter based on magnetic susceptibility measurements in 0,46 kHz and 4,6 kHz . The measurement results showed that the value of area A is 345.2 Ã— 10-8 m3/kg to 571 Ã— 10-8 m3/kg and the value of in area B is 332.3 Ã— 10-8 m3/kg to 668.1 Ã— 10-8 m3/kg. The range of magnetic susceptibility values show that the magnetic minerals contained in the samples are classified as ferrimagnetic minerals. Relative difference between and is known as frequency dependent susceptibility . Calculated value of in area A is about 2.65% to 3.33% and area B is 0.97% to 2.58%. The value of indicates that area A contained more much superparamagnetic grains than area B. Soils that contain much superparamagnetic grains will be finer and easy to absorb water. The addition of soil mass by water could cause the soil more susceptible to landslide if located in steep slope. Keywords: Landslides, magnetic susceptibility, superparamagnetic grain.

PENGUKURAN DAN ANALISIS GRAVITY UNTUK PENENTUAN PROSPEK MINERALISASI BIJIH BESI DI DAERAH SUNGAI PADANG, SIJUK, BELITUNG Eddy Supriyana; Budy Santoso; Bambang Wijatmoko
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 6 (2017): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2017
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Research with Gravity method has been done in Padang River Village of Belitung Province. The purpose of this research is to know the pattern of the potential spread of iron ore, to localize the spread of iron ore and to determine the position of rock intrusion containing mineralization. Gravity data obtained from the measurement results, then modeled to estimate the price of rock density from some subsurface layer. Based on the value of the density contrast is correlated with the porosity (small), then the rock characteristics will be identified so that the tendency of the existence of Seal rocks and Trapping sources can be known. Gravity measurements are done systematically with intervals between observation stations on one line of 25 meters, while the distance between lines of about 500 meters. Bouguer anomaly in the study area ranged from -5 until 75 mGal, forming as low and high anomaly. The height of the Anomaly Bouguer occupies the western part of the study site, its value reaches 30 mGal and to the north of the research area reaches 42 mGal, the height of the North-South trending anomaly flanked by two high anomaly groups. Keywords: Gravity, Bouguer Anomaly, Density, Iron Ore, Mineralization

DESKRIPSI PARAMETER CUACA DAN STABILITAS UDARA TERKAIT KEJADIAN ANGIN PUTING BELIUNG PONTIANAK (STUDI KASUS 30 AGUSTUS 2016) Andreas Kurniawan Silitonga; Immanuel Jhonson Arizona Saragin; Rino Wijatmiko Saragih
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 6 (2017): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2017
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

On Tuesday, August 30th 2016 at 08.00 UTC, a tornado was occured in Pontianak, West Kalimantan. According to BNPB, on Indonesia tornado hazard index maps, Pontianak is an area with a low potential of tornadoes. The study is using an analytical description method for the meteorological data before and when tornado occurred. Pressure and air temperature for two days before tornado was occurred has the same pattern, but there is an anomaly when tornado occurred. Air temperature's pattern shows decline significantly from an hour before tornado was occurred that the value is 8,2 oC. Analysis of surface wind shows that wind velocity when tornado occurred is higher than 2 days before, with an anomaly of 11 knots. LI index shows that atmospheric stability is in stable condition. KI index shows medium potential of convective and the value is higher than 2 days before. TT index shows strong convective and the value is higher than 2 days before. SWEAT shows low potential of convective with stability value higher than 2 days before. CAPE shows strong potential of convective. Interpretation and analysis of satellite show the strong development of convective cloud and potentially causing a tornado in Pontianak at 08.00 UTC. So it can be concluded that when tornado occurred, atmospheric condition is unstable and there are Cb clouds which have Overshooting Top. Keywords: index of atmospheric liability, tornado, Pontianak.

UJI KEMAMPUAN OBSERVASI DAN PRAKIRAAN MENGGUNAKAN MODEL COSMO (STUDI KASUS HUJAN LEBAT DI JAKARTA DAN LAMPUNG 20 FEBRUARI 2017) Wido Hanggoro; Linda Firotul; Asteria S. Handayani; Sri Noviati; Erwin E. S. Makmur; Roni Kurniawan
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 6 (2017): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2017
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

BMKG continues to develop various NWP models to improve the quality of weather forecast information, such as CCAM (Conformal Cubic Atmospheric Model), WRF (Weather Research and Forecasting) and most recently COSMO (Consortium for Small-Scale Modeling). This study aims to determine the ability of the COSMO model in providing extreme precipitation forecast in Indonesia with case studies of heavy rain in Jakarta and Lampung on 20 February 2017. The COSMO model runs with a resolution of 7 km, then compares with GSMaP data and three hourly rainfall observation in Jakarta and Lampung at 5 locations. The results show that GSMaP rain satellite data has a similar pattern with the observed data, so it can be used as a spatial reference to calculate the bias between the COSMO model with GSMaP. Based on COSMO spatial data output, in general, has not given good results, with an average rainfall intensity value of -3 mm in Jakarta and -10 mm for Lampung (underestimated). Thus, it can be concluded that the COSMO model run with the 7 km resolution has not been able to provide accurate information about the occurrence of extreme rain. Keywords: COSMO, GSMaP, rainfall observation, bias

THE IMPACT OF MERIDONAL WIND TO THE MOISTURE TRANSPORT AND WEATHER FORMATION IN WEST INDONESIA ON FEBRUARY 2014 Mahardiani Putri Naulia Batubara
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 6 (2017): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2017
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Wind is the movement of air masses due to the physical differences between continent and ocean. In that motion, wind will transfer the moisture, momentum, and also flux that will affect to the weather formation in the region that will be passed. Meridional wind is a wind with vertical movement from north to the south and vice versa. Meanwhile, moisture transport is the total of water vapor which is transfered by one air mass volume in a different range. The availability of water vapor is one of the main components in the formation of convective clouds in producing rain. In February 2014, weather anomaly occurred in western Indonesia, where the rainfall declined drastically and it became so dry in a wet month. In a comparison to its climatology, the weather condition that formed in February 2014, is the first time occurred in western Indonesia. Geographycally, in the northern of west Indonesia is bordered primarly to Asia continent and South China Sea, so that in monsoon period or cold surge period that usually happened on December, January, and February, the cold air masses willl be transfered to west Indonesia. For that reason, this paper will discuss about the availability of water vapor in February 2014 and the amount of moisture transport. The data that will be used in this observation is data from the European Centre for Medium-Range Weather Forecast (ECMWF) with resolution 0,1250 x 0,1250 and will be processed by the Grid Analysis and Display System (GrADS) application. Keywords: Meridional wind, moisture transport, rainfall

APLIKASI METODE MEAN DAN MEDIAN ABSOLUTE DEVIATION PADA DATA ELEKTROMAGNET SEBAGAI PREKURSOR GEMPA BUMI DI PELABUHAN RATU Sulastri Sulastri; Supriyanto Rohadi; Bambang Sunardi; Aprilia Nur Vita; Angga Setiyo Prayogo
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 6 (2017): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2017
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Electromagnetic anomalies can be used in detecting the presence of earthquake precursors. This study aimed to obtain appropriate statistical methods of electromagnetic data processing in Pelabuhan Ratu. The mean and median absolute deviation methods were applied to electromagnetic data of Pelabuhan Ratu from January to November 2016. The electromagnetic anomaly will be investigated in Hz/Hh and Hh/Hht polarization ratios and E/H electromagnetic impedance. To determine whether the anomaly is an earthquake precursor or due to a magnetic storm, it is necessary to look at Dst index data on the corresponding date. There were electromagnetic anomalies in both applied methods, either as earthquake precursors or due to magnetic storms, with anomalies in E/H electromagnetic impedance that were not significant. The median absolute deviation gave better results than the mean absolute deviation in the identification of electromagnetic anomalies existence. Thus, the median absolute deviation is more suitable to be applied to processing of electromagnetic data as an earthquake precursor in Pelabuhan Ratu. Keywords: electromagnetic anomaly, earthquake precursor, mean, median.

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Dewi Muliyati

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