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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 LAPISAN TERKONTAMINASI RESIDU PUPUK MENGGUNAKAN METODA KELISTRIKAN PADA LAHAN PERTANIAN CEPAT PANEN Ladaya A. Rakhmawati; Eleonora Agustine; Dini Fitriani; Mia Uswatun Hasanah
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (504.189 KB) | DOI: 10.21009/03.SNF2017.02.ERE.02

Abstract

Excessive fertilizer on farmland can increase or decrease mineral elements in the soil. If there is a change in the structure, then the land is a suspected of having the potential to experience contamination that affects the soil fertility. Cropping pattern in a farm area village "X" uses excess fertilizer due to short planting period, so it needs to identify the level of soil fertility on the farmland. One method that could use is the electrical method of rock. This method uses the observable magnetic properties of the ground to figure the value of the soil conductivity. The results showed that farmland in Village "X" has diverse conductivity values but has the same pattern. But when compared with the original soil (not farmland), there are striking differences. In addition to using the electrical method of rock, also conducted the soil color matching using Munsell Color. Keywords: Contamination, Conductivity, Rock Electrical, Munsell Color
IDENTIFIKASI TINGKAT PENCEMARAN PADA LAHAN PERTANIAN MENGGUNAKAN METODE KEMAGNETAN BATUAN Adinda Syifa Azhari; Eleonora Agustine; Dini Fitriani
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (540.137 KB) | DOI: 10.21009/03.SNF2017.02.ERE.03

Abstract

Every industrial activity has the potential to make pollution on agricultural land, in general waste out of that factory is dumped directly into the river, where the waste can be a waste of toxic for the environment. The study aims to get information from the soil sample has been meticulous about the level of pollution in farming caused by waste disposal a textile mill which is located in Bandung. The experiment at the different places, there is the area which located closer by pollution source (a) and area which far from pollution source (b). After we’ve done the measurement, we got some data, there are PH (a) =7,8, PH(b) = 7,1, TDS dan EC (a) = 0,161 - 0,313 dan 0,34 - 0,627, TDS dan EC (b) = 0,06 - 0,206 dan 0,127 - 0,419, cfd % (a) = 0,66 – 2,4 % , cfd % (b) = 3,26 – 3,76 %.  That data is shown the pollution of the soil at the place, it is area (a), which specification are PH (>>), TDS and EC (>>) and cfd % (<<), it means the soil is alkali with big grain and has high salt concentration. Keywords: Industrial textiles, pollution, land.
ANALISIS PERUBAHAN TROPICAL TROPOPAUSE LAYER DI BENUA MARITIM INDONESIA Indah Susanti; Sinta Berliana Sipayung
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (752.832 KB) | DOI: 10.21009/03.SNF2017.02.ERE.04

Abstract

Temperature is an important parameter in climate change, and the temperature changes not only occur on the surface of the earth only. Tropical Tropopause Layer (TTL), a region which has the characteristic troposphere and stratosphere, a critical part of the atmosphere, a layer in the tropics between the main convective outflow level and the cold point, about 12-18 km. This study aims to identify changes occurring in the TTL that are focused on temperature and pressure parameters that are indicator for changes in other parameters. Using Atmospheric Infrared Sounder (AIRS) version 6 data with 1 km vertical resolution, 1-degree horizontal resolution, and monthly temporal resolution (from 2003 to 2015), analyzed TTL changes over Indonesia (80 - 150ËšBT and 20ËšLS - 20ËšLU). Based on the time series analysis, show increasing temperature and pressure in the TTL. The analysis results show that TTL characteristics, influenced by convective processes and radiative processes. Keywords: climate change, tropical tropopause layer, temperature, pressure, convection, radiation.
PEMANFAATAN GAS METANA DARI LIMBAH CAIR SEBAGAI SUMBER ENERGI Irhan Febijanto
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (664.288 KB) | DOI: 10.21009/03.SNF2017.02.ERE.05

Abstract

Utilization of biogas generated from wastewater of Palm Oil Mills (POM) is one of the alternative renewable energy which has a huge potential. This potential is supported by about 700 of POMs owned by private companies or state own company which scattered in Sumatera, Kalimantan and Sulawesi, mainly. Utilization of biogas as an electricity contributes to increase ratio of renewable energy utilization. However, there is a change of selling electricity price according to Ministerial Decree of Energy and Mineral Resource of Republic of Indonesia No.:12/2017, which the price is not determined based on the FIT (Feed in Tariff) anymore. New price is based on Cost Production of Power Plant (BPP) and it leads to a decline in the economy rate of biogas power plant. Therefore, investors become uninterested for developing biogas power plant in the future. Potential additional revenue from selling palm kernel was studied. An excess biogas is used to substitute palm kernel shell as boiler fuel of POM, and the substituted shell is sold to the market. The additional revenue from selling the shell increased economy rate of the biogas power plant. It is shown that IRR=7,21% increased to 14.43%. Keywords: Biogas Power Plant, wastewater, component price, methane gas.
PEMANFAATAN LIMBAH UBI KAYU DARI SISA PENGOLAHAN TEPUNG TAPIOKA DI KECAMATAN MARGOYOSO KABUPATEN PATI MENJADI BAHAN ADSORBEN UNTUK PENJERNIH AIR Jotti Karunawan; Annisa Lidia Wati; Ita Rahmawati; Sulhadi Sulhadi; Aan Priyanto; Mahardika Prasetya Aji
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (268.761 KB) | DOI: 10.21009/03.SNF2017.02.ERE.06

Abstract

One of the central cassava production is located in Pati Regency Central Java. The high production of cassava is supported by cassava post-harvest and process it into tapioca flour. However, the problem arises during the production of tapioca flour from cassava. Waste materials which are produced from tapioca flour production pollute the environment. Charcoal (carbon material) has been produced from tapioca waste material production through pyrolysis process. The carbon performance is tested by analyzing its absorbance toward methylene blue solutions. The carbon performance testing shows that the absorption intensity of methylene blue decreased. This result indicates the absorption of methylene blue by carbon. The descent rate of methylene blue intensity is correspond to tho the addition of carbon mass. Carbon from cassava waste is effective as absorbent to reduce methylene blue textile waste. Keywords: Waste, Cassava, Pati district.
PERANCANGAN POWER BANK DENGAN MENGGUNAKAN DINAMO SEPEDA SEDERHANA Alfi Ridwanto; Wisnu Broto
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (184.64 KB) | DOI: 10.21009/03.SNF2017.02.ERE.07

Abstract

One of the problems that often arise when in the course of using a bicycle is the battery smartphone that runs out before the destination. Therefore, the dynamo of a bicycle is a device that converts the energy of motion into electricity that comes from the rotation of tires that occur during the streets. Since the source of the dynamo is the tire rotation, the output of the dynamo is unstable due to the changing speed. So we need an energy storage to hold the electrical energy. The power bank is a device used to store energy from the dynamo and is used to transfer payloads to Smartphones and mobile phones. Keywords: Smartphone, Power bank, Electric
ANALISIS POTENSI PEMBANGKIT LISTRIK TENAGA MINI HIDRO DI CATCHMENT AREA WADUK JATIGEDE Sinta Berliana Sipayung; Amalia Nurlatifah; Bambang Siswanto
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (608.972 KB) | DOI: 10.21009/03.SNF2017.02.ERE.08

Abstract

Jatigede Reservoir is the second largest reservoir in Southeast Asia. The reservoir will function as a Hydro Power Plant (PLTA) with an installed capacity of 110 MW. In this research will be predicted the potential of PLTMH in Catchment Area of Jatigede Reservoir around Cimanuk Watershed until 2020. The data used in this research include monthly rainfall prediction data based on CCAM model output from 1998-2020. Rainfall data will be validated using TRMM rainfall observation data from 1998-2014. The CCAM output rainfall data is used as the input data of debit estimation and water level by the SWAT model. The estimated discharge data and water level will be used as a material for calculating power potential. Both CCAM modeling results, TRMM image, CRU, and station data show that the catchment area of ​​Jatigede Reservoir (DAS Cimanuk) has a monsoonal or maximum rainfall pattern in the DJF season and a minimum in the JJA season. The CCAM output data itself shows good performance in estimating monthly rainfall in the area as evidenced by the high correlation between CCAM and TRMM monthly rainfall at Leuwi Daun which reaches about 0.58 and CCAM-Station reaches 0.71. While in Leuwi Goong the correlation results are not much different and show good performance too. According to the ArcSWAT model, there was a decrease of about -2x10-6 m3 / month discharge in the catchment area of ​​Jatigede Reservoir. The decline is arguably not so significant that despite the decrease in rainfall, the potential power of PLTMH in the Jatigede Reservoir by 2020 is fixed. Potential power in Catchment Area Jatigede Reservoir itself ranges up to 50 MW. Keywords: PLTMH, rainfall, flow, power
ANALISIS FOTOLUMINESENSI KARBON DOT DARI DAUN TEH DAN DAUN PEPAYA DENGAN TEKNIK MICROWAVE Alvin Dior Al Ghifari; Wahyu Pratama Putra; Isnaeni Isnaeni
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (437.187 KB) | DOI: 10.21009/03.SNF2017.02.MPS.04

Abstract

Carbon dot nanoparticles from processed tea leaves and papaya leaves produced using microwave technique have been made. The purpose of this research was to study the change of optical properties of carbon dot nanoparticles luminescence with photoluminescence test. To make carbon dots, processed tea leaves and papaya leaves were extracted using blender and distilled water, then were put in microwave oven for 5, 10, 20 and 40 minutes. Filtering was done for getting homogeneous carbon dot nanoparticles. Photoluminescence test was performed by exciting the colloidal carbon dot with a diode laser at a wavelength of 405 nm. Luminescent light of carbon dot was recorded by spectrometer. In general, luminescent light of carbon dots was cyan. The results of photoluminescence test showed that the luminescence curves of tea leaves and of papaya leaves were different. The sample heating time in microwave also affected the carbon dot luminescence curves. The change in the luminescence curve showed the structure of energy band on the carbon dot. From this study it can be concluded that carbon dot from natural materials can be easily made by microwave technique and photoluminescence technique can analyze the optical properties. Keywords: carbon dots, photoluminescence, tea leaves, papaya leaves.
DISPERSI DENGAN METODE KERING UNTUK PENINGKATAN KONDUKTIVITAS KOMPOSIT LIMBAH GRAFIT/KARBON SERAT ALAM PADA APLIKASI PELAT BIPOLAR FUEL CELL Dita Rama Insiyanda; Achmad Chaer
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (339.772 KB) | DOI: 10.21009/03.SNF2017.02.MPS.05

Abstract

Proton Exchange Fuel Cell Membrane (PEMFC) is the simplest type of fuel cell and is a promising alternative to power sources. The most important component of PEMFC is bipolar plate because 80% of total volume, 70% of total weight, and 60% of total production cost. Therefore, it is necessary for bipolar plates to be mass-produced to achieve the fulfillment of effectiveness and efficiency in the production of bipolar plates PEMFC. In this research, dry or dry method dispersion is used. The composites used are the polymer as matrix and graphite from factory waste and Carbon black (CB) from natural material of coconut fiber as an amplifier made from burning at 1300oC in inert condition. Then, the formation using hot press with pressure 55 tonf/s, 150oC for 60 minutes with dimension 5x5x (0,2-0,4) cm3. The highest result of this research is conductivity value of 20 S/cm. Thus, the dispersion by this dry method can be used as an alternative to increasing the conductivity in the manufacture of materials for PEMFC bipolar plate applications. Keywords: Dry Methods, Composites, Conductivity, Bipolar Plates, PEMFC.
ANALISIS PENGARUH TEMPERATUR HOT PRESS TERHADAP PENINGKATAN NILAI FRAKSI β FILM PVDF Ahmad Novi Muslimin; Ambran Hartono; Arif Tjahjono; Nurul Fadilah; Priyambodo Priyambodo
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (395.191 KB) | DOI: 10.21009/03.SNF2017.02.MPS.06

Abstract

PVDF film is a piezoelectric material that is still being developed as transducer and piezoelectric sensor. It is caused by the piezoelectric constant and the mechanical properties of PVDF are larger than the existing polymer piezoelectric. The high demand for the use of PVDF films makes it possible to make low-cost PVDF films with high piezoelectric properties. There are a variety of techniques used to make PVDF films especially PVDF films that have high β-phase fractions. In this research, PVDF film was made using simple hot press, at temperature 165ᴼC, 180ᴼC and 195ᴼC and heating time 15, 30 and 45 minutes. From the research results, PVDF film produced with the smallest thickness of 200μm and the largest is 345μm. The largest fraction of β obtained was 40.47% at 180 ° C with 30 minutes heat heating time and the smallest fraction of β obtained was 31.05% at a hot press temperature of 165 ᴼC at heating time of 45 minutes. Based on the value of β fraction obtained, at a press temperature of 180 ᴼC and a 30 minute heating time is a good process used for PVDF filmmaking. Keywords: PVDF film, hot press, β fraction, piezoelectric.

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