INDONESIAN JOURNAL OF APPLIED PHYSICS
Indonesia Journal of Apllied Physics provides rapid publication of short reports and important research in all fields of physics. Indonesia Journal of Apllied Physics publishes articles that are of significance in their respective fields whilst also contributing to the disclipline of physics as a whole. Articles should be submitted to the Editorial Office of Indonesia Journal of Apllied Physics through this site. Further information on submission is also available at this site
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<![CDATA[Identifikasi Pola Aliran Sungai Bawah Tanah Daerah Karst di Desa Gebangharjo Kecamatan Pracimantoro Menggunakan Metode Tomography Resistivity Konfigurasi Wenner-Schlumberger ]]>
<![CDATA[Yudi Purwanto]]>;
<![CDATA[Darsono Darsono]]>;
<![CDATA[Sorja Koesuma]]>
<![CDATA[ INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October ]]>
Publisher : <![CDATA[Department of Physics, Sebelas Maret University ]]>
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DOI: 10.13057/ijap.v7i2.12766
<![CDATA[This research is conducted using 4 lines data with 750 meters in length. Tomography resistivity with Wenner-Schlumberger configuration is used as this research methodology to take the data with a = 50 meters and n=1, 2, 3, 4, 5, 6. Resistivitymeter OYO 2119C McOHM-ELmodel is used as the instrument. Furthermore, the data is processed with two softwares; Res2Dinv ver. 3.56.22 to get 2D resistivity section and RockWork16to make 3D model of the site. The underground river’s chamber is made by hollow carbonate rocks with the resistivity of >412 Ωmand 117,6 Ωm – 412 Ωm for limestone’s resistivity as its capsrock. Researching to the depth of 173 meters, underground rivers are shown in the line 2 in the depth of 65 to 134 meters, 65 to 173 meters in the line 3, and in the cross section of line 3 and line 4. While in the first trajectory, another chamber is found within the depth of 12.5 to 40 meters. It is expected that the underground river is flowing to the south because of the chamber in third and fourth trajectory are lower than second trajectory.]]>
<![CDATA[Exploration of Iron Sand at The Eastern Coast Area of Binangun in Cilacap Regency Using Magnetic Survey ]]>
<![CDATA[Sehah Allasimy]]>;
<![CDATA[Sukmaji Anom Raharjo]]>;
<![CDATA[Iska Andriyanto]]>
<![CDATA[ INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October ]]>
Publisher : <![CDATA[Department of Physics, Sebelas Maret University ]]>
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DOI: 10.13057/ijap.v7i2.13700
<![CDATA[Exploration of the spread of iron sand on the eastern coastal of Binangun District in Cilacap Regency has been conducted using the magnetic surveys. The magnetic data acquisition was conducted in April 2017. The total magnetic field data obtained is processed, so that can be obtained the local magnetic anomaly data. The modeling of the local magnetic anomaly data is performed on the trajectory of AB that extending from the position point of 109,274698° E and 7.686620° S to 109.2296195° E and 7.689099° S so that obtained various model of the subsurface anomalous objects. Interpretation on the subsurface anomalous objects is done to estimate the types of rocks and their formations based on the magnetic susceptibility value of each object which supported by the geological information of the research area. Based on the interpretation results to be obtained two layers of subsurface rocks that can be estimated as the iron sand that coexists with silt dan clay derived from the alluvium formation. The first rock has a length of 1238.2 meters, a depth of 1.709 – 20.513 meters, and a magnetic susceptibility value of 0.0183 cgs unit. The second rock has a length of 643.055 meters, a depth of 16.524 – 34.188 meters, and a magnetic susceptibility value of 0.0174 cgs unit. The results of this research are also supported by the results of geoelectric data interpretation, where the iron sand that coexists with silt and clay is found at a depth of 9.42 – 19.48 meters with a resistivity value of 52.99 Ωm at Geo-1 point; and a depth of 10.56 – 22.20 meters with resistivity value of 49,03 Ωm at Geo-2 point. Based on the results of of this research, the eastern coastal area of Binangun District is estimated to contain potentially iron ore and economically is a prospect for exploitation.]]>
<![CDATA[Front Matter Vol 07 No 02 2017 ]]>
Mohtar Yunianto
<![CDATA[ INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October ]]>
Publisher : <![CDATA[Department of Physics, Sebelas Maret University ]]>
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DOI: 10.13057/ijap.v7i2.19972
<![CDATA[Analisis Seismisitas dan Energi Gempabumi di Kawasan Jalur Sesar Opak Oyo Yogyakarta ]]>
<![CDATA[Nugroho Budi Wibowo]]>;
<![CDATA[Juwita Nur Sembri]]>
<![CDATA[ INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October ]]>
Publisher : <![CDATA[Department of Physics, Sebelas Maret University ]]>
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DOI: 10.13057/ijap.v7i2.13702
<![CDATA[The earthquake that occurred in the Region of Yogyakarta caused by fault activity on the surface, such as Opak-Oyo Fault, Dengkeng Fault, Menoreh Fault and plate tectonic activity in South of Java. Opak-Oyo fault activity reflected from epicenter distribution and earthquake energy. This research aims to analyze the earthquake energy which has epicenter around the Opak-Oyo Fault in spatial and temporal. Based on earthquake catalog from 2008 – 2016, there were 66 earthquake with 11 significant event. Epicenter distribution reflected in seismicity map and for the tectonic parameter use least square method. Seismicity map of Opak Oyo Fault area show that distribution of epicenter in the East and Southeast of fault line with the calculation result of b value by least square method is 0.4. In temporal, there is an increasing trend of events in 2008-2015 and decline trend of earthquake in 2015- 2017. Earthquake energy that released in Opak Oyo Fault area has varies value about 1x105.2 – 1x1012joules. Meanwhile, the energy that associated with the existence of Opak Fault Lines has value between 1x105.2 – 1x109.6 Joule with 10-20 km of hypocenter.The distribution energy has similar pattern with geological formations in that area. ]]>
<![CDATA[Back Matter Vol 07 No 02 2017 ]]>
Mohtar Yunianto
<![CDATA[ INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October ]]>
Publisher : <![CDATA[Department of Physics, Sebelas Maret University ]]>
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DOI: 10.13057/ijap.v7i2.19974
<![CDATA[Pengaruh temperatur sintering terhadap struktur dan sifat magnetik La3+ - barium nanoferit sebagai penyerap gelombang mikro ]]>
<![CDATA[Siti Uswatun Hasanah]]>;
<![CDATA[Wahyu Widanarto]]>;
<![CDATA[Sunardi Sunardi]]>
<![CDATA[ INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October ]]>
Publisher : <![CDATA[Department of Physics, Sebelas Maret University ]]>
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DOI: 10.13057/ijap.v7i2.14978
<![CDATA[Seri La3+-barium nanoferit telah dibuat melalui metode solid-state reaction termodifikasi tanpa sintering dan dengan sintering pada temperatur 600, 800 dan 1000 °C. Pengaruh temperatur sintering terhadap komposisi, struktur, ukuran kristal, sifat magnetik dan kemampuan menyerap gelombang mikro dari La3+-barium nanoferit dikarakterisasi masing-masing menggunakan XRD, VSM dan VNA. Hasil karakterisasi menunjukkan bahwa La3+-barium nanoferit yang di-sintering pada 600 ºC mempunyai kemampuan menyerap gelombang mikro yang paling baik, dengan rata-rata nilai reflection loss sebesar -16,2165 dB pada frekuensi 10,86 GHz. Ferit terdiri dari tiga fasa kristal yaitu BaLa2Fe2O7, BaFe11.9O19, dan Fe21.33O32 dengan nilai Hc yang rendah 231,65 Tesla. Hal ini menunjukkan bahwa temperatur sintering sangat berpengaruh terhadap La3+-barium ferit sebagai penyerap gelombang mikro.]]>
<![CDATA[Karakteristik Sensor Kapasitif Pelat Sejajar Dalam Aplikasinya Sebagai Instrumen Pengukur Curah Hujan Berbasis Arduino Uno ]]>
<![CDATA[Bowo Eko Cahyono]]>;
<![CDATA[Supriyadi Supriyadi]]>;
<![CDATA[Muhammad Ainur Rofiq]]>
<![CDATA[ INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October ]]>
Publisher : <![CDATA[Department of Physics, Sebelas Maret University ]]>
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DOI: 10.13057/ijap.v7i2.14248
<![CDATA[Penelitian ini bertujuan untuk mempelajari karakteristik dari kapasitor pelat sejajar sebagai sensor dalam alat ukur curah hujan berbasis Arduino dengan tampilan LCD. Alat ini mampu membaca dan menampilan tegangan keluaran, nilai kapasitansi, konstanta dielektrik dan tinggi level curah hujan akibat adanya perubahan komposisi bahan dielektrik di antara pelat kapasitor. Sistem yang didesain telah diuji dalam 3 tahapan yaitu, uji akurasi pembacaan nilai kapasitansi, nilai ketinggian air, dan pengujian di lapangan. Nilai-nilai kapasitansi sensor yang ditampilkan dalam LCD dibandingkan dengan nilai kapasitansi sensor yang diukur dengan menggunkan kapasitansi meter CM-3300A. Dalam pengujian ini didapatkan hasil bahwa nilai-nilai kapasitansi yang diukur dengan dua etode yang berbeda tersebut saling berdekatan. Selisih tertinggi adalah 20,97pF pada ketinggian 15cm. Tinggi level air yang terbaca dibandingkan dengan pembacaan menggunakan penggaris dan hasilnya menunjukkan bahwa selisih terkecil yaitu 0,19 mm dan selisih terbesar 4,93 mm. Selanjutnya berdasarkan pengujian langsung di lapangan didapatkan selisih yang tidak terlalu jauh, dengan rata-rata selisih yang diperoleh kurang dari 5 mm. Secara umum, sistem alat ukur curah hujan telah menunjukkan kinerja yang bagus saat dilakukan pengujian dan diaplikasikan pada kondisi hujan secara langsung di lapangan. Hasil tersebut telah menunjukkan bahwa sistem alat ukur curh hujan telah sesuai dengan apa yang diharapkan.]]>
<![CDATA[Pencitraan 3D Data Geolistrik Resistivitas dengan Rockworks Berdasarkan Hasil Inversi Res2DInv untuk Mengetahui Persebaran Batuan Konglomerat di Desa Surodadi, Kecamatan Gringsing, Kabupaten Batang ]]>
<![CDATA[Taufik Nur Fitrianto]]>;
<![CDATA[Supriyadi Supriyadi]]>;
<![CDATA[Teguh Maulana Mukromin]]>
<![CDATA[ INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October ]]>
Publisher : <![CDATA[Department of Physics, Sebelas Maret University ]]>
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DOI: 10.13057/ijap.v7i2.13952
<![CDATA[Research was conducted to determine distribution of Conglomerate in Surodadi Village, Gringsing, Batang. The data acquisition used Schlumberger array. The length of line is 165 m and 15 m electrode spacing. The data processing used Microsoft Excel and 2D imaging used Res2Dinv. Then 3D imaging used Rockworks from result of Res2DInv inversion. The position data was used on UTM coordinate from position data each of electrode. The data acquisition was done at two parallel lines. In this area was found two types of rocks; tuffaceous sandstone and conglomerate. The conglomerate with resistivity values higher than 180 Wm is distribution on southeast research area at the depth 5 m – 25 m. While the tuffaceous sandstone layers is distribution on northwest research area.]]>
<![CDATA[Cover ]]>
Mohtar Yunianto
<![CDATA[ INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October ]]>
Publisher : <![CDATA[Department of Physics, Sebelas Maret University ]]>
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DOI: 10.13057/ijap.v7i2.19984
<![CDATA[Optimizing an Octane Number of Motor Gasoline (MOGAS) 91 RON with Blending Methods ]]>
<![CDATA[Ahmad Mustafid Miftahul Huda]]>;
<![CDATA[Subagjo Wakimin]]>;
<![CDATA[Selvia Sarungu]]>
<![CDATA[ INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): October ]]>
Publisher : <![CDATA[Department of Physics, Sebelas Maret University ]]>
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DOI: 10.13057/ijap.v7i2.13002
<![CDATA[Motor Gasoline (MOGAS) that serves as modifiers thermal energy into mechanical energy with a Research Octane Number (RON) of 91 was produced by mixing (blending) of two components. RON are high is one of MOGAS specifications needed for good engine performance. To obtain a MOGAS with high RON usually needs additional materials, chemical components. In this work we don’t need any additional materials to increasing the RON. In the field of oil and gas blending method is a method that is widely used to acquire new products that are superior and achieve quality standards. The components used in blending these are products with a value of RON 88 and 92. Examination of specific gravity (ASTMD-1298) was conducted to obtain specific gravity (SG) and temperature observations (T), while the ASTMD-86 distillation examination was conducted to determine the components in materials. The results showed that the product specifications in accordance with the existing products on the market. The acquisition of distillate reached 95% with losses of about 3.9%, and the residue of 1.1%.]]>
