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All Journal Bulletin of Scientific Contribution : Geology VA Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Jurnal Informatika dan Teknik Elektro Terapan Buletin Sumber Daya Geologi axial : jurnal rekayasa dan manajemen konstruksi Journal of Engineering and Scientific Research (JESR) Dielektrika : Jurnal Ilmiah Kajian Teori dan Aplikasi Teknik Elektro Parameter Journal of Applied Science, Engineering and Technology (J. ASET) Prosiding Seminar Nasional Hasil Penelitian Sains, Teknik dan Aplikasi Industri Fakultas Teknik Universitas Lampung Electrician : Jurnal Rekayasa dan Teknologi Elektro Jurnal Rekayasa elektrika Journal of Geosciences and Applied Geology Jurnal Geosaintek SNTE
Syaiful Alam
Department of Electrical Engineering Faculty of Engineering, Universitas Lampung Jl. S. Brojonegoro 1, Bandar Lampung, 35145
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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APPLIED GEOSTATISTICS TO THE ASSESSMENT OF ENHANCED GEOTHERMAL SYSTEM (EGS) IN CENTRAL SUMATERA BASIN Sihotang, Josua Washington; Alam, Syaiful
Buletin Sumber Daya Geologi Vol 14, No 2 (2019): Buletin Sumber Daya Geologi
Publisher : Buletin Sumber Daya Geologi

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Abstract

Thick sediment (over 2,500 m), fractured basement and high thermal gradient (up to 19.10 C/100 m) of Central Sumatra Basin are suitable factors to have the Enhanced Geothermal System (EGS) potential. A number of 130 wells data were used to evaluate the EGS of the basin. The assessment is divided into the number of estimation within the grid cell (1x1 km) of sediment thickness, heat flow, thermal conductivity and technical potential calculated starting from basement-sediment layer interface. The distribution of heat flow and gradient thermal values correspond to the sediment layer. The autocorrelation test indicates the data is stationary. The variance of data gets bigger after a depth over 5.5 km. According to the Beardsmore protocol, the technical potential value ranged from 0.5 MW up to 4.7 MW at a depth of 3.5 km. In addition, the lowest technical potential is 0.66 MW and the highest is 5.76 MW at a depth of 4.5 km. The ordinary kriging, using the number of lags 10 in variogram modeling, estimated the technical potential distribution is higher to the southwest.
ANALISIS GAYA GRAFFITI WAHYU COEASRT TAHUN 2014–2016 ALAM, SYAIFUL; , WINARNO
Jurnal Seni Rupa Vol 7, No 2 (2019)
Publisher : Jurnal Seni Rupa

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Abstract

Graffiti sering disebut sebagai seni yang mencerminkan perkembangan kota. Tidak hanya kota besar yang terkena dampak perkembangan graffiti salah satunya kota Tuban. Graffiti sudah ada di Tuban sejak tahun 2000-an. Wahyu Coesart merupakan salah satu seniman graffiti yang bisa disebut seniman jenius karena dapat menggabungkan 2 kata atau lebih dalam satu karya serta merupakan seniman yang berpengaruh di kota Tuban.Penelitian ini bertujuan untuk mendeskripsikan perjalanan Wahyu Coesart di dunia graffiti, Proses pembuatan karya graffiti dan gaya graffiti yang digunakan oleh Wahyu Coesart pada tahun 2014 - 2016. Penelitian ini menggunakan metode kualitatif yang diuraikan secara deskriptif. Data yang diperoleh melalui proses observasi, wawancara, dokumentasi dan analisis karya yang mengacu pada buku dari Gottliieb. Untuk mendapatkan data yang valid dilakukan triangulasi data dan informant review.Hasil penelitian ini menunjukan Wahyu memulai graffiti pada tahun 2003 saat sering diajak berkumpul dengan seniman graffiti oleh kakaknya ,Proses penciptaan graffiti dimulai dari sketsa, penentuan warna, penentuan media, Proses mendasari media, Fill-in, Framing, Pembuatan dimensi ,Piece outline dan gaya graffiti yang digunakan wahyu pada tahun 2014 - 2016 adalah abstract, Wildstyle, silvers dan Semi-wild. Kata kunci : Graffiti, Coesart, Tuban
APPLIED GEOSTATISTICS TO THE ASSESSMENT OF ENHANCED GEOTHERMAL SYSTEM (EGS) IN CENTRAL SUMATERA BASIN Sihotang, Josua Washington; Alam, Syaiful
Buletin Sumber Daya Geologi Vol. 14 No. 2 (2019): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1289.037 KB) | DOI: 10.47599/bsdg.v14i2.284

Abstract

Thick sediment (over 2,500 m), fractured basement and high thermal gradient (up to 19.10 C/100 m) of Central Sumatra Basin are suitable factors to have the Enhanced Geothermal System (EGS) potential. A number of 130 wells data were used to evaluate the EGS of the basin. The assessment is divided into the number of estimation within the grid cell (1x1 km) of sediment thickness, heat flow, thermal conductivity and technical potential calculated starting from basement-sediment layer interface. The distribution of heat flow and gradient thermal values correspond to the sediment layer. The autocorrelation test indicates the data is stationary. The variance of data gets bigger after a depth over 5.5 km. According to the Beardsmore protocol, the technical potential value ranged from 0.5 MW up to 4.7 MW at a depth of 3.5 km. In addition, the lowest technical potential is 0.66 MW and the highest is 5.76 MW at a depth of 4.5 km. The ordinary kriging, using the number of lags 10 in variogram modeling, estimated the technical potential distribution is higher to the southwest.
MONITORING KETIDAKSEIMBANGAN BEBAN TRANSFORMATOR DISTRIBUSI MENGGUNAKAN INTERNET OF THINGS Zebua, Osea; Komalasari, Endah; Alam, Syaiful; Aldiansyah, Aldiansyah
DIELEKTRIKA Vol 8 No 2 (2021): DIELEKTRIKA
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram

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Abstract

Unbalanced load is one of the causes of unpredictable distribution transformer failure, so it is necessary to monitor the unbalanced load condition of the distribution transformer. Internet of things technology-based equipment supports remote monitoring needs. This paper presents the monitoring of unbalanced load in distribution transformer based on IoT technology. The ZMPT101B voltage sensor and SCT019 current sensor are used to measure the rms voltage and current in each phase, the Arduino microcontroller is used to process the measurement data and send it to the network server via an ethernet shield and a wifi router equipped with an internet modem. The results showed that the monitoring equipment based on IoT technology is able to work to monitor load unbalanced online so that it could be monitored remotely via device connected to the internet network
Monitoring Loss of Life Transformator Distribusi Menggunakan Internet of Things Zebua, Osea; Komalasari, Endah; Alam, Syaiful
DIELEKTRIKA Vol 9 No 1 (2022): DIELEKTRIKA
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram

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Abstract

Berbagai karakteristrik operasi dan gangguan yang terjadi pada dapat mengurangi umur pelayanan transformator distribusi. Pembebanan yang berlebihan, ketidakseimbangan beban dan gangguan hubungsingkat dapat mengakibatkan temperatur isolasi transformator naik dan mengakibatkan kerusakan isolasi transformator distribusi. Pemantauan dan monitoring transformator distribusi setiap waktu terkendala dengan banyaknya jumlah transformator distribusi, letak dan posisi pemasangan transformator distribusi dan jumlah tenaga pemantau yang terbatas. Tujuan dari penelitian ini adalah memonitoring prediksi loss of life (berkurangnya umur pelayanan) transformator distribusi dari jarak jauh dan kontinyu dengan merancang dan membuat suatu peralatan monitoring berbasis mikrokontroler dan teknologi internet of things (IoT). Hasil penelitian menunjukkan bahwa peralatan yang dibuat mampu menampilkan prediksi loss of life, besaran-besaran listrik dan temperatur transformator distribusi secara online yang dapat dilihat melalui peralatan yang terhubung ke jaringan internet.
Stratigraphy and structural pattern of Kebumen Region using Second Vertical Derivative of Gravity Data, Central Java Alam, Syaiful
Journal of Geological Sciences and Applied Geology Vol 4, No 1 (2020): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v4i1.29018

Abstract

Gravity forward modeling has been carried out in Kebumen Region, Central Java Province. With its position on the mélange complex, the geological complexity in this area is still a challenge to be modeled. Bougeur anomaly values in the study area ranged from 50 mGal to 130 mGal. The structural morphology of the Luk-Ulo Mélange Complex and Kulon Progo Mountain have higher Bougeur anomaly, ranging from 105 to 125 mGal. The residual positive anomaly zones in the northwest and southeast are situated with residual negative anomaly zones in between. The shallow effect through the Second Vertical Derivative method shows the patterns of fault types separating the two anomalous zones of Karangsambung and Kulon Progo region. The Luk Ulo Mélange Complex and stratigraphy of Karangsambung Formation up to Halang Formation are faulted by thrust-fault and strike-slip structural pattern. Keyword: Stratigraphy, structural pattern, second vertical derivative.
Evidence of Pliocene-Pleistocene Unconformity in eastern Bogor Trough, Sumedang-West Java Alam, Syaiful; Sendjadja, Yoga Andriana; Jurnaliah, Lia; Fachrudin, Kurnia Arfiansyah; Gani, Reza Mohammad Ganjar
Journal of Geological Sciences and Applied Geology Vol 3, No 1 (2019): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v3i1.21528

Abstract

AbstractRecent measuring stratigraphic observation in Cikandung River has revealed the Late Pliocene stratigraphic and tectonic event. Research area is located in easter Bogor Trough. Previously, it was stated controversially pertaining to the stratigraphic relationship between Kaliwangu and Citalang Formations. The outcrop-based remark has never been explained, slightly intuitive. Making strike and dip measurements and stratigraphic analysis using tape and compass traverse were done to unveil the role of Plio-Pleistocene tectonic regime in stratigraphic-filling of the basin. Strike azimuths recorded from several locations of Citalang and Kaliwangu Formations show angular geometry and both of those sedimentary facies within formations indicate the significant and rapid change in depositional process. But interestingly, the angular geometry is only founded in the southern part of study area. To the north, angular relationship becomes parallel. This geometrical distribution implies the strong influence of tectonic regime in Late Pliocene interval. The evidence from outcrops observation conclude the unconformity between Citalang and Kaliwangu Formations. Keywords: Stratigraphic unconformity, Citalang and Kaliwangu Formations, Plio Pleistocene Tectonic
MOUNTAIN-FRONT SINUOSITY AND ASYMMETRICAL FACTOR OF LELES-GARUT INTRA-ARC BASIN, WEST JAVA Haryanto, Iyan; Setiadi, Djadjang Jedi; Alam, Syaiful; Ilmi, Nisa Nurul; Sunardi, Edy
Journal of Geological Sciences and Applied Geology Vol 2, No 5 (2018): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i5.20230

Abstract

The Leles-Garut Basin, with an elevation ranges between 650 and 725 above mean sea level, is a Quaternary topographic basin area situated in the east-trending volcanic arc of West Java. In contrast to the adjacent Bandung Basin, the nature of the basin bounding area of the Leles-Garut Basin is not clearly defined. The presence of volcanic chain and structural lineament exhibits the difference in morphological features. A quantification of morphological indices was chosen to redefine an active tectonic involvement in surrounding basin border. Mountain-front sinuosity indices range from 1.1 to 3.9 and basin asymmetrical factor suggests a wide range of the effects of active tectonic even a little tilting. The study unveil that the basin bounding is not only volcano-bounded but also fault-bounded.
Stratified Soil Characterization using 1D Resistivity Inversion along the Pasuruan Coastline, East Java Alam, Syaiful; Khoirullah, Nur; Rukmana, Yanwar Yusup
Journal of Geological Sciences and Applied Geology Vol 2, No 5 (2018): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i5.20248

Abstract

The inversion has been widely used in subsurface modeling of numerousdata. The number of stratified soil layer and thicknesswere driven by damped least-squares inversion method.This studyintegrated five borehole logs and six vertical electrical sounding measurements. The inversion result is able to predict an unsampled of borehole data. The resulting maximum rms error is 0.22 and minimum rms error is 0.011 from 1D inversion.The borehole datas indicatedgravelly soil layer, sandy soil layer,and clayey soil layer withthe resistivity values respectively range from 33.6-7.45 (Ohm.m), 7.45-3.98 (Ohm.m), and 3.98-0.016 (Ohm.m).Based on the studyresult there were possibilities of seawater intrusion indication according to the soil stratigraphic profile based on resistivity properties and borehole data. Keyword: Pasuruan coastline, stratified soil, 1D resistivity inversion.
PENERAPAN ANALOG MODULASI LEBAR PULSA MENGUBAH DAYA DC KE DAYA AC 3 FASA UNTUK MEMUTAR MOTOR BLDC TIGA FASA Soedjarwanto, Noer Arif; Alam, Syaiful; Komalasari, Endah; Umar, Muhammad Abdullah
Jurnal Informatika dan Teknik Elektro Terapan Vol 12, No 3S1 (2024)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jitet.v12i3S1.5312

Abstract

Teknologi yang kian pesat perkembangannya selaras dengan energi yang dikonsumsinya memberikan dampak negatif kepada sumber energi listrik konvensional serta mengakibatkan kerusakan lingkungan dimana perlunya energi alternatif yaitu energi baru terbarukan (EBT). Energi baru terbarukan ini menghasilkan energi listrik dalam bentuk arus searah (DC) yang perlu diubah menjadi arus bolak-balik (AC). Maka, hasil energi listrik yang diproduksi EBT dapat dikonversi menjadi arus bolak-balik dengan menggunakan inverter. Maka penilitian disini adalah untuk simulasi dan membuat inverter tiga fasa untuk mengubah energi listrik DC menjadi AC tiga fasa lalu dihubungkan ke motor bldc tiga fasa dengan berbagai frekuensi. Inverter memerlukan sebuah sistem kontrol dalam penaklaran transistor daya, dimana metode yang digunakan adalah Sinusoidal Pulse Wide Modulation (SPWM) yang dimana metode ini membandingkan dua gelombang yaitu gelombang fundamental (sinus) dan gelombang karir (segitiga) dimana hasil dari komunikasi ini yang dipanggil sebagai SPWM yang nantinya digunakan untuk pensaklaran transistor daya pada inverter. Keluaran dari inverter disambungkan ke motor bldc tiga fasa lalu diukur kecepatannya menggunakan tachometer serta frekuensi yang dikeluaran dapat divariasikan dengan mengatur frekuensi dasar gelombang dengan menggunakan mikrokontroler. Konklusi yang dapat diambil dari penelitian ini mendemonstrasikan bahwa kecepatan pada kecepatan motor bldc tiga fasa yang mana berbanding lurus terhadap frekuensi.
Co-Authors Adryan Fitrayudha Afri Yudamson Ageng Sadnowo Ageng Sadnowo Repelianto Ahmad Saudi Samosir Aldiansyah, Aldiansyah Anwar Efendy Arief, Khollaqul Aulia, Zahwa Dinda Budi Muljana Djadjang Jedi Setiadi Edy Sunardi Elfitra, Dhanu emir nasrullah Endah Komalasari Endah Komalasari, Endah Fachrudin, Kurnia Arfiansyah Fariyadin, M. Ruslin Anwar, Indradi Wijatmiko, Adiman Helmy Fitriawan Ildrem Syafri Iyan Haryanto Jimmy Lukita Khoirullah, Nur Komarudin, M. Laksana, Agung Lia Jurnaliah Lutfia, Mutia Aini Muhamad Komarudin Muhammad, Asep Abdullah Muthia, Tiya Nisa Nurul Ilmi Noer Soedjarwanto Nurdradjat, . Nurdrajat Nurdrajat Osea Zebua Reza Mohammad Ganjar Gani Rukmana, Yanwar Yusup Saputra, S D Sedjahtera, A Sendjadja, Yoga Andriana Setyawan, FX Arinto Sihotang, Josua Washington Soedjarwanto, Noer Arif Sri Purwiyanti Sri Ratna Sulistiyanti SUBAGJA, MUHAMAD AGAM Sukamto, Ika Sumiyarsi Titin Yulianti Umar, Muhammad Abdullah Umi Murdika WINARNO Yusi Firmansyah, Yusi