Jurnal Riset Fisika Indonesia
The Jurnal Riset Fisika Indonesia (JRFI) (e-ISSN: 2797-6513; p-ISSN: 2776-1460) is an open access and peer-reviewed journal, published by Department of Physics - Universitas Bangka Belitung, which is a dissemination medium for research result from scientists, engineers, and practitioners in many fields of physics. JRFI is a biannual journal issued on December and June. The editors welcome submissions of papers describing recent theoretical and experimental research related to: (1) Theoretical articles; (2) Empirical studies; (3) Practice-oriented papers; (4) Case studies; (5) Review of papers, books, and resources. Focus and scope for JRFI as follows: Theoretical physics Computational physics Material physics Geophysics Instrumentation Applied physics
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<![CDATA[Analisis b-value Gempabumi Menggunakan Metode Gutenberg-Richter Berdasarkan Estimasi Maximum Likelihood Di Daerah Sulawesi Utara ]]>
<![CDATA[Reski Maulinda]]>;
<![CDATA[Tri Kusmita]]>;
<![CDATA[Herman Aldila]]>;
<![CDATA[Triani Triani]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v4i2.3804
<![CDATA[Sulawesi is an area prone to earthquakes. This is because the Sulawesi region is flanked by three main plates, namely the Pacific Ocean plate moving westward, the Australian Continental Plate moving northward, and the Eurasian Plate moving south-southeast. This situation causes a high level of seismicity in the Sulawesi region. The Sulawesi region has a fairly complex tectonic setting so that the activity of earthquakes in the Sulawesi region is also interesting to study. The level of seismicity depends on the degree of fragility of the rock (b-value) and the distribution of earthquakes in the region. This research was conducted to determine the b-value of earthquakes in the North Sulawesi region. The method used for this research is the Gutenberg-Richter method based on the Maximum Likelihood estimation. Maximum Likelihood Estimation is a method used to statistically calculate earthquake activity parameters. The software used are ArcGIS and Microsoft Excel. The research was conducted in North Sulawesi with coordinates 118° East - 125° East 1° North Latitude - 6° South Latitude. The data used is earthquake catalog data obtained from BMKG with earthquake data for a period of 10 years (2012-2021). Based on the results of the analysis of the distribution of seismicity based on magnitude, it is more towards the Sulawesi Sea and the distribution of seismicity based on depth is shallow. The result of calculating the b-value is 0.3537 and the a-value is 3.0932. It can be concluded that the North Sulawesi region has a fairly large chance of an earthquake occurring]]>
<![CDATA[Sintesis dan karakteristik nanopartikel CaO dari cangkang kerang darah (Anadara granosa) menggunakan metode kopresipitasi ]]>
<![CDATA[Nur Hayati]]>;
<![CDATA[Widodo Budi Kurniawan]]>;
<![CDATA[Indah Puspita]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v4i2.4378
<![CDATA[The lithium ion battery is a type of secondary battery. A good component to be used as the anode of a lithium ion battery is Li4Ti5O12 (LTO). LTO has a low conductivity value so doping is necessary. Doping particle size greatly affects the conductivity of LTO. The purpose of this doping was carried out to find out how the effect of CaO nanoparticle doping on the conductivity value of the LTO battery anode using the coprecipitation method by varying the molarity of NaOH, namely 1M, 3M and 7M. Based on the results of research on the influence of NaOH molarity, it produces different sizes of nanoparticles. The smallest nanoparticle size was obtained in the 3M sample variation, which was 175.0 nm. With a purity of CaO nanoparticles of 96.35%. While the conductivity value of the lithium ion battery doped with CaO nanoparticles with three variations of NaOH molarity, the optimum value was obtained in the 1M sample, which was 1.06 × 10-6 S/cm. This is because the 1M variation produces very low impurities compared to the 3M and 7M variations which have more impurities, this can affect the conductivity value.]]>
<![CDATA[Kajian Variasi Massa Karbon Aktif dan Waktu Kontak terhadap Kinetika Adsorpsi Ion Logam Besi (Fe) pada Limbah Cair Batik Cual ]]>
<![CDATA[Rena Aprilianti]]>;
<![CDATA[Herman Aldila]]>;
<![CDATA[Widodo Budi Kurniawan]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v4i2.4416
<![CDATA[Cual batik liquid waste discharged directly into the environment can cause environmental problems due to containing various heavy metals such as iron metal (Fe). Adsorption method is one of the efforts to reduce heavy metal content in wastewater. This study utilises activated carbon from coconut shell waste to be used as a heavy metal adsorbent. The activated carbon used is the result of physical and chemical activation processes. Based on SEM results, activated carbon has pores with a pore diameter of 81.84 µm and a surface area of 0.2315 cc/g. The adsorption process was carried out using activated activated carbon with mass variations of 0.25 grams, 1.5 grams, and 1.75 grams. Meanwhile, the contact time variations used were 0, 40, 80, 120, and 160 minutes. The results showed that the most optimum mass variation of activated carbon to absorb Fe metal was 1.5 grams with a contact time of 80 minutes which left a residual Fe metal of 0.161 ppm.]]>
<![CDATA[Analisis Tingkat Kebisingan di Tempat Bermain Anak X Di Kota Palangka Raya ]]>
<![CDATA[Yunita Enzelina Silaban]]>;
<![CDATA[Akhmadi Surya Nata]]>;
<![CDATA[Uci Purnama Purba]]>;
<![CDATA[Reni Agustiani]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v4i2.5272
<![CDATA[Children's play areas that exceed the Noise Limit Value (NTV) can cause hearing health problems, including physiological and communication disorders. Therefore, this study aims to evaluate the noise level at one of the X children's playgrounds in Palangka Raya City which is busy with visitors. This research is important for playground owners to create a safe and comfortable environment for visitors. Noise levels are measured using a sound level meter which is then analyzed to determine the average noise value at each data collection point. Based on the analysis carried out, it shows that the average noise value at children's playground X in Palangka Raya City on weekdays is 79.52 dBA, while on holidays it reaches 81.76 dBA. This value exceeds the threshold recommended by the World Health Organization (WHO) and the Indonesian Ministry of Health for recreational areas which should be in the range of 70 dB. Based on this research, it is recommended that management take mitigation steps such as using building materials that absorb sound, limiting children's play time, and providing ear protection for zones with high noise levels.]]>
<![CDATA[Studi Literatur Sistem Elektrokultur Dalam Mempercepat Pertumbuhan Dan Perkembangan Tanaman ]]>
<![CDATA[Ahmad Jahrudin]]>;
<![CDATA[Siti Ayu Kumala]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v4i2.5338
<![CDATA[In the development of agricultural or plant technology, innovations are needed to increase efficiency in the process of accelerating growth and the harvest period. The application of physics in the fields of agriculture and biology is one that can be developed. One study that is very interesting to discuss is the application of the electroculture system, which uses electricity to help speed up the growth process and harvest period, in addition to growth and development of electroculture is also claimed to be able to minimize attacks by insect pests and viruses, in this article we review several studies related to the effect of the electroculture system on plants, and from several studies we can prove the effect of applying the electroculture system in accelerating the growth and development process, there are several ways to Electroculture applications include antenna systems, direct current, alternating current, development of electrogenetic seeds and the use of electrolysis]]>
<![CDATA[Implementasi Sistem Keamanan Pintu Otomatis Berbasis Face Recognition di Proactive Robotic: Integrasi ESP32-Cam dan Telegram ]]>
<![CDATA[Heriyanto Syafutra]]>;
<![CDATA[Thufeil Muhammad Nur Aziz]]>;
<![CDATA[Inna Novianty]]>;
<![CDATA[Irmansyah Irmansyah]]>;
<![CDATA[Muhamad Chusnu]]>;
<![CDATA[Dwi Prayoga]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
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DOI: 10.33019/jrfi.v4i2.5380
<![CDATA[The research focuses on implementing an automatic door lock system based on face recognition using the ESP32-Cam microcontroller and integrating it with the Telegram platform. The system is designed to enhance security at Proactive Robotic by leveraging IoT technology for office door access control. System design began with needs analysis and identification of existing security issues which do not integrate with other smart home systems at the institution. Development methods included hardware and software design, circuit schematic creation, PCB production, and physical assembly. System testing ensured facial detection, recognition, and essential solenoid operation in varying lighting conditions. Test results showed the system accurately recognizes registered faces under standard lighting, automatically unlocks doors, and sends real-time notifications via Telegram. However, system accuracy under low-light conditions needs improvement, as well as enhanced user data security to protect stored information privacy. This research contributes to developing IoT and face recognition-based security applications. The system successfully implements cutting-edge technology to improve physical security and access management in office environments, laying the foundation for future advancements in security technology.]]>
<![CDATA[Analisis b-value Gempabumi Menggunakan Metode Gutenberg-Richter Berdasarkan Estimasi Maximum Likelihood Di Daerah Sulawesi Utara ]]>
<![CDATA[Maulinda, Reski]]>;
<![CDATA[Kusmita, Tri]]>;
<![CDATA[Aldila, Herman]]>;
<![CDATA[Triani, Triani]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
Show Abstract
|
Download Original
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Original Source
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DOI: 10.33019/jrfi.v4i2.3804
<![CDATA[Sulawesi is an area prone to earthquakes. This is because the Sulawesi region is flanked by three main plates, namely the Pacific Ocean plate moving westward, the Australian Continental Plate moving northward, and the Eurasian Plate moving south-southeast. This situation causes a high level of seismicity in the Sulawesi region. The Sulawesi region has a fairly complex tectonic setting so that the activity of earthquakes in the Sulawesi region is also interesting to study. The level of seismicity depends on the degree of fragility of the rock (b-value) and the distribution of earthquakes in the region. This research was conducted to determine the b-value of earthquakes in the North Sulawesi region. The method used for this research is the Gutenberg-Richter method based on the Maximum Likelihood estimation. Maximum Likelihood Estimation is a method used to statistically calculate earthquake activity parameters. The software used are ArcGIS and Microsoft Excel. The research was conducted in North Sulawesi with coordinates 118° East - 125° East 1° North Latitude - 6° South Latitude. The data used is earthquake catalog data obtained from BMKG with earthquake data for a period of 10 years (2012-2021). Based on the results of the analysis of the distribution of seismicity based on magnitude, it is more towards the Sulawesi Sea and the distribution of seismicity based on depth is shallow. The result of calculating the b-value is 0.3537 and the a-value is 3.0932. It can be concluded that the North Sulawesi region has a fairly large chance of an earthquake occurring]]>
<![CDATA[Sintesis dan karakteristik nanopartikel CaO dari cangkang kerang darah (Anadara granosa) menggunakan metode kopresipitasi ]]>
<![CDATA[Hayati, Nur]]>;
<![CDATA[Kurniawan, Widodo Budi]]>;
<![CDATA[Puspita, Indah]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
Show Abstract
|
Download Original
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Original Source
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DOI: 10.33019/jrfi.v4i2.4378
<![CDATA[The lithium ion battery is a type of secondary battery. A good component to be used as the anode of a lithium ion battery is Li4Ti5O12 (LTO). LTO has a low conductivity value so doping is necessary. Doping particle size greatly affects the conductivity of LTO. The purpose of this doping was carried out to find out how the effect of CaO nanoparticle doping on the conductivity value of the LTO battery anode using the coprecipitation method by varying the molarity of NaOH, namely 1M, 3M and 7M. Based on the results of research on the influence of NaOH molarity, it produces different sizes of nanoparticles. The smallest nanoparticle size was obtained in the 3M sample variation, which was 175.0 nm. With a purity of CaO nanoparticles of 96.35%. While the conductivity value of the lithium ion battery doped with CaO nanoparticles with three variations of NaOH molarity, the optimum value was obtained in the 1M sample, which was 1.06 × 10-6 S/cm. This is because the 1M variation produces very low impurities compared to the 3M and 7M variations which have more impurities, this can affect the conductivity value.]]>
<![CDATA[Kajian Variasi Massa Karbon Aktif dan Waktu Kontak terhadap Kinetika Adsorpsi Ion Logam Besi (Fe) pada Limbah Cair Batik Cual ]]>
<![CDATA[Aprilianti, Rena]]>;
<![CDATA[Aldila, Herman]]>;
<![CDATA[Kurniawan, Widodo Budi]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
Show Abstract
|
Download Original
|
Original Source
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Check in Google Scholar
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DOI: 10.33019/jrfi.v4i2.4416
<![CDATA[Cual batik liquid waste discharged directly into the environment can cause environmental problems due to containing various heavy metals such as iron metal (Fe). Adsorption method is one of the efforts to reduce heavy metal content in wastewater. This study utilises activated carbon from coconut shell waste to be used as a heavy metal adsorbent. The activated carbon used is the result of physical and chemical activation processes. Based on SEM results, activated carbon has pores with a pore diameter of 81.84 µm and a surface area of 0.2315 cc/g. The adsorption process was carried out using activated activated carbon with mass variations of 0.25 grams, 1.5 grams, and 1.75 grams. Meanwhile, the contact time variations used were 0, 40, 80, 120, and 160 minutes. The results showed that the most optimum mass variation of activated carbon to absorb Fe metal was 1.5 grams with a contact time of 80 minutes which left a residual Fe metal of 0.161 ppm.]]>
<![CDATA[Analisis Tingkat Kebisingan di Tempat Bermain Anak X Di Kota Palangka Raya ]]>
<![CDATA[Silaban, Yunita Enzelina]]>;
<![CDATA[Nata, Akhmadi Surya]]>;
<![CDATA[Purba, Uci Purnama]]>;
<![CDATA[Agustiani, Reni]]>
<![CDATA[ Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024 ]]>
Publisher : <![CDATA[Jurusan Fisika, Universitas Bangka Belitung ]]>
Show Abstract
|
Download Original
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Original Source
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Check in Google Scholar
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DOI: 10.33019/jrfi.v4i2.5272
<![CDATA[Children's play areas that exceed the Noise Limit Value (NTV) can cause hearing health problems, including physiological and communication disorders. Therefore, this study aims to evaluate the noise level at one of the X children's playgrounds in Palangka Raya City which is busy with visitors. This research is important for playground owners to create a safe and comfortable environment for visitors. Noise levels are measured using a sound level meter which is then analyzed to determine the average noise value at each data collection point. Based on the analysis carried out, it shows that the average noise value at children's playground X in Palangka Raya City on weekdays is 79.52 dBA, while on holidays it reaches 81.76 dBA. This value exceeds the threshold recommended by the World Health Organization (WHO) and the Indonesian Ministry of Health for recreational areas which should be in the range of 70 dB. Based on this research, it is recommended that management take mitigation steps such as using building materials that absorb sound, limiting children's play time, and providing ear protection for zones with high noise levels.]]>
