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Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics

al-fiziya
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Published by Universitas Islam Negeri Syarif Hidayatullah Jakarta

ISSN : 26210215 EISSN : 2621489X DOI : -

Core Subject : Science, Engineering,

Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics is a journal of physics that published by Departement of Physics, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta. The aim of the journal is to disseminate the researches done by researchers both from Indonesian and overseas. This journal focused on physics field including Materials Sciences, Geophysics, Instrumentation Physics, and Theoretical Physics. AL-FIZIYA is also dedicated to preserving the transmission of knowledge of science. The journal welcomes contributions from scholars around the world in the physics field, both in English and Bahasa.

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Articles 154 Documents

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Analisis Karakterisasi Teknologi Direct Sequence Spread Spectrum Dan Frequency Hopping Spread Spectrum Fawzan Galib Abdul Karim Bawahab; Elvan Yuniarti; Edi Kurniawan
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.2
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Abstrak. Pada penelitian ini, telah dilakukan analisa karakterisasi pada teknologi Direct Sequence Spread Spectrum dan Frequency Hopping Spread Spectrum, sebagai salah satu teknik multiple-access pada sistem komunikasi. Karakterisasi dilakukan untuk mencari bagaimana cara meningkatkan keoptimalan kedua sistem tersebut, dalam mengatasi masalah interferensi dengan sistem dan channel yang sama. Dan juga untuk menentukan veriabel apa yang mempengaruhi keoptimalan kedua sistem tersebut. Karakterisasi dilakukan dengan menentukan variabel-variabel yang mempengaruhi keoptimalan keduanya. Hasil dari karakterisasi, diketahui variabel-variabel yang mempengaruhi kemampuan sistem DSSS yaitu nilai frekuensi spreading (). Sedangkan untuk sistem FHSS yaitu nilai frekuensi spreading ( dan ) dan selisih antara frekuensi hopping data dengan frekuensi hopping interferensi . Kata Kunci: BER, DSSS, FHSS, Interference, Spread spectrum. Abstract. In this study, characterization of Direct Sequence Spread Spectrum and Frequency Hopping Spread Spectrum technologies have been done, as one of the multiple-access techniques in communication systems. Characterization is done to find out how to improve the ability of the two systems, in solving interference problems with the same system and channel. And also to determine what veriabel affects the ability of the two systems. Characterization is done by determining the variables that affect the ability of both. The results of the characterization, known variables that affect the ability of the DSSS system are the spreading frequency value (). As for the FHSS system, the spreading frequency value ( and ) and the difference between frequency hopping data with frequency hopping interference .

Sintesis dan Karakterisasi Barium Heksaferit dengan Variasi Pengurangan Massa Fe2O3 Ryan Rizaldy; Sitti Ahmiatri Saptari; Wisnu Ari Adi
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.1
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Barium Heksaferit berhasil disintesis dengan menggunakan metode solid state reaction, dalam upaya untuk menghasilkan fase yang tunggal, kami melakukan pengurangan massa dari Fe2O3. Dimana kami mengurangi dengan komposisi tertentu, kami menggunakan faktor pengurangan x dengan variasi x = 1, 2, 3, dan 4. Hasil dari sintesis di karakterisasi menggunakan XRD untuk melihat fase-fase apa saja yang terbentuk. Hasil data XRD kami analisis menggunakan metode penghalusan Rietveld, dan mendapakan hasil dimana berkurangnya komposisi pengotor (dalam hal ini Fe2O3) pada hasil sintesis seiring dengan pengurangnya massa bahan baku Fe2O3

Identifikasi Uranium dan Thorium di Desa Takandeang Mamuju Sulawesi Barat dengan Menginterpretasikan Data Radiometri Tanah atau Batuan Mutia Khairani; Sutrisno Sutrisno; Frederikus Dian Indrastomo
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.1
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Abstrak. Hasil survey dosis radiasi lingkungan menunjukkan di daerah Mamuju memiliki nilai laju dosis radiasi (radioaktivitas) yang cukup tinngi.Nilai radioaktivitas tinggi yang dijumpai pada batuan diperkirakan berasal dari keterdapatan kandungan radioaktif alami seperti unsur uranium (U) dan thorium (Th). Penelitian yang dilakukan bertujuan untuk mendapatkan kesimpulan unsur radioaktif apa yang mempengaruhi nilai laju dosis di daerah tersebut tinggi. Metode penelitian yang diterapkan adalah pengukuran radiometri, penentuan nilai ambang (threshold), menentukan populasi anomali pada unsur radioaktif dari data radiometri dengan menggunakan metode kurva probabilitas, interpolasi kriging dengan metode ordinary kriging dan analisis peta sebaran laju dosis, peta sebaran uranium, dan peta sebaran thorium. geologi daerah penelitian tersusun atas batugamping, batu lava, batuan breksi dan endapan aluvial. Berdasarkan hasil analisis diketahui bahwa nilai laju dosis tinggi mencapai 4.271,3 nSv/h di Desa Takandeang dipengaruhi oleh keterdapatan unsur thorium, dengan kadar 435,7 ppm eTh dan uranium berkadar 426 ppm eU. Abstract. Survey results of environment radiation in Mamuju show that the value of dose rate of radiation (radioactivity) is high enough. That high radioactivity value that is found in rocks is hypothesized to be generated by natural radioactive unsure such as uranium (U) and thorium (Th). The aim of this study is to get conclusion of what radioactive unsure that influences high dose rate in that region. The methods in this study are radiometry measurement, determination of treshold, determination of anomaly population on radioactive unsure from radiometry data using probability curve method, kriging interpolation with ordinary kriging method and analysis of dose rate distribution map, uranium distribution map, and thorium distribution map. The geology of studied region is composed of limestones, lava rocks, breccia rocks, and alluvial sediments. Accroding to the result of analysis, we conclude that the value of high dose rate in Takandeang Village that reaches 4.271,3 nSv/h is influenced by thorium, with level 435,7 ppm eTh and uranium with level 426 ppmeU.

Ultra Short Baseline (USBL) Calibration for Positioning of Underwater Objects Bagus Septyanto; Dian Nurdiana; Sitti Ahmiatri Saptari
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.2
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

In general, surface positioning using a global satellite navigation system (GNSS). Many satellites transmit radio signals to the surface of the earth and it was detected by receiver sensors into a function of position and time. Radio waves really bad when spreading in water. So, the underwater positioning uses acoustic wave. One type of underwater positioning is USBL. USBL is a positioning system based on measuring the distance and angle. Based on distance and angle, the position of the target in cartesian coordinates can be calculated. In practice, the effect of ship movement is one of the factors that determine the accuracy of the USBL system. Ship movements like a pitch, roll, and orientation that are not defined by the receiver could changes the position of the target in X, Y and Z coordinates. USBL calibration is performed to detect an error angle. USBL calibration is done by two methods. In USBL calibration Single Position obtained orientation correction value is 1.13 ̊ and a scale factor is 0.99025. For USBL Quadrant calibration, pitch correction values is -1.05, Roll -0.02 ̊, Orientation 6.82 ̊ and scale factor 0.9934 are obtained. The quadrant calibration results deccrease the level of error position to 0.276 - 0.289m at a depth of 89m and 0.432m - 0.644m at a depth of 76m

Studi Pemodelan Distribusi Konduktivitas Bawah Permukaan 3-D Berbasis Data Resistivitas Menggunakan Program Aplikasi DCIP3D Versi 2.1 Nadhia Fairuz Syafira; Sitti Ahmiatri Saptari; Adhika Junara Karunianto
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.2
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Human needs will increase in various aspects, including the need for content in the earth. In describing the distribution of physical properties beneath the earth's surface, 3-D modeling is the best way to find out the details of the subsurface content of the earth. To facilitate the making of 3-D models from the earth, the DCIP3D application program is used. DCIP3D develops a series of inversion algorithms to restore 3-D conductivity models. The research was conducted to optimize the use of DCIP3D version 2.1. The data used are secondary and synthetic data. Secondary data is resistivity geoelectric data consisting of four line of the results of the PTBGN-BATAN survey in the Ahu Mamuju, West Sulawesi, 2017. Data processing is done by making mesh cell size which is a discritization of the earth model. The variation of the mesh core size is done (5 × 5 × 5) m, (10 × 10 × 10) m and (15 × 15 × 15) m. By completing various input files for DCIP3D, the 3-D subsurface conductivity model was successfully restored. Adding topographic values to the model causes the model to look even more real. The best model that describes the conductivity of the secondary data survey area is a model with a core cell (10 × 10 × 10) m because it corresponds to the distance between the electrodes used during data acquisition.

Simulasi Stabilisasi Sudut Gerak Rotasi Quadrotor OS4 EPFL dengan Kendali LQG (Linear Quadratic Gaussian) Muhammad Ibrahim; Edi Kurniawan; Elvan Yuniarti
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.1
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Penelitian ini membahas tentang simulasi model gerak rotasi quadrotor OS4 EPFL dengan kendali LQG (Linear Quadratic Gaussian). Quadrotor disebut juga quadrotor helicopter atau quadrocopter, adalah sebuah pesawat tanpa awak (unmanned aerial vehicle / UAV) yang digerakkan oleh empat rotor yang terletak di kanan, kiri, depan dan belakang ujung kerangka silang yang simetri. Penelitian ini bertujuan untuk merancang sistem kendali LQG (Linear Quadratic Gaussian) untuk gerak rotasi quadrotor dan memastikan kinerja kendali LQG serta menganalisisnya. Metode penelitian yang digunakan dengan mensimulasikan gerak rotasi dengan menggunakan software MATLAB Simulink R2014b. Dari penelitian yang telah dilakukan, didapatkan adalah program simulasi stabilisasi sudut gerak rotasi quadrotor dengan kendali LQG berjalan dengan baik dan pemilihan matriks bobot Q =[1 1 1 1 70 70] dan R memiliki nilai 6.25 x 10-5 yang digunakan. Untuk kondisi awal sebesar pi/4 radian untuk sudut roll radian untuk sudut pitch dan yaw pi/4 diperoleh waktu stabil sekitar 5,6,5 menit. Hal tersebut menunjukkan kondisi yang baik

Analisis Plug-in Repetitive Control untuk Rejection Multiple Periodical Disturbance dengan Metode Least Common Multiplier dan Multi Repetitive Control Nizarrachman Hadi; Edi Kurniawan; Ambran Hartono
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.1
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Abstrak. Sistem kendali otomatismenjadi sangat penting saat ini. Teknologi instrumentasi yang berkembang sangat pesat menjadikan sistem kendali otomatis berkembang pesat. Dengan adanya sistem kendali otomatis ditemukan pula gangguan yang memengaruhi sistem, seperti Noise atau sinyal gangguan. Berbagai metode kendali banyak digunakan salah satunya adalah Repetitive Control. Kemudian diperlukanlah pengujian analisis untuk memilih sistem kendali mana yang paling baik dalam menghilangkan sinyal gangguan yang memiliki 3 nilai frekuensi dengan menggunakan sistem Plug-in Repetitive Control (RC) yang dilengkapi dengan filter. Pada penelitian ini digunakan metode Least Common Multiple (LCM) dan metode Multi Repetitive Control (MRC). Hasil penelitian menunjukkan bahwa sistem dengan metode MRC memiliki kecepatan menghilangkan sinyal gangguan paling baik yaitu 1.8s.Abstract. Automatic control system becomes very important today. The fast growing technology of instrumentation makes the automatic control system grow rapidly. With the existence of automatic control system there is found disturbances that affect the system, such as noise or disturbance signal. Various control methods are widely used, one of them is Repetitive Control. Analytical testing is then needed to choose which control system is best for rejecting disturbance signals that have 3 frequency values using a Plug-in Repetitive Control (RC), using filtered system. This research used Least Common Multiple (LCM) method and Multi Repetitive Control (MRC) method. The results showed that the system with MRC method is slightly faster and best in rejecting disturbance signals with rejecting time 1.8s.

Perancangan Sequence Backfill Di Lokasi Penambangan Bukit 7A Baru Studi Kasus PT. ANTAM, Tbk UBP Bauksit Tayan, Kabupaten Sanggau, Kalimantan Barat Ahmad Fathurrohman; A. Sylvan Erusani; Ahmad Fauzan Haryono
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.2
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v2i2.13038

Penimbunan kembali tanah penutup lahan bukaan bekas tambang harus dilakukan secara matang dan terencana, perencanaan penimbunan mencakup tahapan – tahapan yang sequential dan terukur jumlah volume dan waktunya. Hal ini dilakukan agar kegiatan penimbunan dapat meminimalisir dampak terhadap lingkungan serta menyesuaikan pada Peraturan Pemerintah (PP) No. 78 Tahun 2010 tentang Reklamasi dan Pascatambang. Perencanaan sequence backfill perlu mengetahui luas area penimbunan, elevasi awal sebelum penimbunan, kinerja alat yang digunakan untuk penimbunan, volume material penimbunan yang tersedia serta jam bekerja perusahaan yang tersedia. Pengolahan data dilakukan dengan menggunakan software Surpac dan AutoCAD. Hasil dari analisis yang dilakukan maka produktivitas alat penimbunan berupa 2 excavator adalah 440,77 LCM/Jam dan dibuat 3 sequence penimbunan backfill yang total volume penimbunannya adalah 143.807 LCM (Loose Cubic Meters) dan total volume topsoil 8.658,16 LCM . Masing – masing sequence terdiri dari, besar volume sequence I 52.418 LCM, besar volume sequence II 52.375 LCM, dan besar volume sequence III 39.014 LCM. Dengan jumlah waktu penimbunan 19,15 hari.

Analisis Pengaruh Bentuk Filler Pada Komposit Batang Bambu Terhadap Nilai Kekerasan (Hardness Shore D) Ahmad Firdaus; Arif Tjahjono; Sitti Ahmiatri Saptari
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.1
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Tanaman bambu yang berlimpah di Indonesia belum banyak di manfaatkan sebagai bahan penelitian. Bambu dapat dimanfaatkan pada komposit berpenguat bambu sebagai filler. Pada penelitian ini telah dilakukan pembuatan papan komposit dengan paduan matriks campuran resin dan hardener dengan filler batang bambu. Dalam proses sintesis, digunakan perbandingan resin epoxy dan hardener yaitu 80% berbanding 20%, serta filler berbahan batang bambu dengan variasi bentuk filler : filler serbuk dan filler memanjang. Pengujian kekerasan komposit dilakukan dengan menggunakan alat durometer dengan metode Hardness Shore D. Nilai kekerasan maksimum rata-rata pada komposit filler serbuk adalah 72.00 ± 2.65 Shore D dan nilai kekerasan maksimum rata-rata pada komposit filler memanjang adalah 77.60 ± 3.78 Shore D. Hasil tersebut menunjukan bahwa komposit filler memanjang lebih keras dari komposit filler serbuk

Rancang Bangun Smarthome Menggunakan Wemos D1 R2 Arduino Compatible Berbasis ESP8266 ESP-12F Nurul Aditya Ayu Kusuma; Elvan Yuniarti; Asrul Aziz
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.1
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

ABSTRAK Pemanfaatan smarthome berbasis internet banyak digunakan sebagai sarana untuk memudahkan pengontrolan. Penelitian ini memanfaatan teknologi internet dan sebuah mikrokontroler sebagai kendali otomatis. Penelitian ini bertujuan untuk membangun perangkat lunak dan perangkat keras smarthome Wemos D1 R2 Arduino compatible berbasis ESP8266 ESP-12F. Dengan metode eksperimen dan studi pustaka, penelitian ini telah berhasil merancang bangun smarthome menggunakan Wemos D1 R2 Arduino compatible berbasis ESP8266 ESP-12F. Komponen yang digunakan pada penelitian ini meliputi: mikrokontroler Wemos D1 R2, ESP8266 ESP-12F sebagai wifi, 3 relay untuk 3 elektronik (lampu, kipas dan pengeras suara), 3 led untuk indikator 3 elektronik, resistor dan sebuah smartphone yang digunakan sebagai pengontrol elektronik melalui website. Hasil penelitian ini sudah sesuai dengan tujuannya yaitu membangun perangkat lunak dengan alamat IP yang digunakan 192.168.43.52 (setiap Wemos memiliki IP address yang berbeda-beda) dan perangkat keras dengan mensimulasikan smarthome menggunakan LED maupun alat-alat elektronika. ABSTRACT Utilization of Internet-based smarthome is widely used as a means to facilitate control. This research utilizes internet technology and a microcontroller as an automatic control. This research aims to build software and hardware smarthome Wemos D1 R2 Arduino compatible based ESP8266 ESP-12F. Using experimental and literature study methods, this research has successfully designed a smarthome build using Wemos D1 R2 Arduino compatible based on ESP8266 ESP-12F. The components used in this study includes: Wemos D1 R2 microcontroller, ESP8266 ESP-12F as wifi, 3 relays for 3 electronics (lamp, fan and loudspeaker), 3 leds for indicator 3 electronics, resistor and a smartphone used as electronic controller through the website. The results of this study are in accordance with the goal of building the software with IP addresses used 192.168.43.52 (each Wemos has a different IP address) and hardware by simulating smarthome using LED and electronic devices.

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