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All Journal Jurnal Manajemen Teknologi ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Jurnal Elektronika dan Telekomunikasi E-JOINT (Electronica and Electrical Journal Of Innovation Technology) Makara Journal of Technology Electron: Jurnal Ilmiah Teknik Elektro
Deny Hamdani
the State Islamic University (UIN) of Syarif Hidayatullah - Jakarta
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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Model Struktural Pengaruh Atribut Produk Terhadap Kepuasan dan Loyalitas Pelangan : Studi Kasus Pelanggan Telkomsel di Jabodetabek Surjandari, Isti; Hamdani, Deny
Jurnal Manajemen Teknologi Vol 8, No 1 2009
Publisher : SBM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2681.856 KB)

Abstract

Industri telekomunikasi seluler berkembang sangat pesat di Indonesia. Hal ini diikuti dengan tingkat persaingan yang tinggi yang mendorong tiap operator untuk dapat meningkatkan kepuasan dan loyalitas pelanggannya sebagai strategi untuk dapat bertahan. Hingga saat ini tarif masih menjadi hal yang sensitive bagi pelanggan dan juga merupakan salah satu factor utama yang mempengaruhi preferensi pelanggan dalam memilih jasa telekomunikasi seluler. Hal ini menjadi salah satu sebab tingginya tingkat perpindahan pelanggan dari satu operator ke operator lain (chun rate), dimana Indonesia merupakan salah satu Negara dengan tingkat churn yang lebih tinggi di Asia. Tingginya tingkat churn dan pesaingan di industri telekomunikasi seluler ini menyebabkan kepuasan dan loyalitas pelanggan menjadi hal yang harus diperhatikan oleh setiap operator. Penelitian ini bertujuan untuk menganalisis hubungan antara atribut produk terhadap tingkat kepuasan dan loyalitas pelanggan pada industry telekomunikasi seluler di Indonesia dengan menggunakan Structural Equation Modeling (SEM). Sebagai studi kasus dipilih pelanggan Telkomsel di wilayah Jabodetabek ( Jakarta, Bogor, Depok, Tangerang, Bekasi ). Hasil dari penelitian ini berupa model structural yang menggambarkan rangkaian pola perilaku pelanggan pada industri telekomunikasi seluler untuk melihat pengaruh variabel atribut produk (kualitas produk, kualtias layanan, keterjangkauan tariff, dan image perusahaan) terhadap tingkat kepuasan (satisfaction), kepercayaan (trust), komitmen (commitment), keluhan (complaint), dan loyalitas (loyality) pelanggan.Katakunci: kepuasan pelanggan, loyalitas pelanggan, structural equation modeling
Capacity of High-Speed Powerline Communication in Vehicles Hamdani, Deny; Safrianti, Ery
Makara Journal of Technology Vol. 7, No. 2
Publisher : UI Scholars Hub

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Abstract

Powerline Communication (PLC) Systems intents to use the mains network in vehicles for high-speed data transmission. Carrier frequencies in the range of MHz are required to establish data rates of some megabits per second. In this paper, typical reference channels extracted from channel measurements are presented and computation results of their capacities according to Shannon’s theorem are presented. Furthermore, the effect of limitations of frequency range and power spectral density of transmitted signal on achievable capacity is investigated. This paper outlines an assessment for theoretical channel capacity and achievable data rates of vehicular PLC transmission schemes. Finally, EMC (Electromagnetics Compatibility) constraint according to CISPR 25 (Comite International Special des Perturbations Radioelectrique – The International Special Committee on Radio Interference) is deeply considered.
Construction of Short-Length High-Rates LDPC Codes Using Difference Families Hamdani, Deny; Safrianti, Ery
Makara Journal of Technology Vol. 11, No. 1
Publisher : UI Scholars Hub

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Abstract

Low-density parity-check (LDPC) code is linear-block error-correcting code defined by sparse parity-check matrix. It is decoded using the massage-passing algorithm, and in many cases, capable of outperforming turbo code. This paper presents a class of low-density parity-check (LDPC) codes showing good performance with low encoding complexity. The code is constructed using difference families from combinatorial design. The resulting code, which is designed to have short code length and high code rate, can be encoded with low complexity due to its quasi-cyclic structure, and performs well when it is iteratively decoded with the sum-product algorithm. These properties of LDPC code are quite suitable for applications in future wireless local area network.
Estimating the Differential Mode Noise of a DC-DC Converter Yoppy, Yoppy; Mandaris, Dwi; Bakti, Aditia Nur; Nugroho, Hutomo Wahyu; Yudhistira, Yudhistira; Hamdani, Deny
Jurnal Elektronika dan Telekomunikasi Vol 23, No 2 (2023)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jet.558

Abstract

Electromagnetic noise emission is inevitable in a DC-DC converter due to the employed switching technique. In low frequency, the noise propagating through cabling and conductive media is called a conducted emission. A conducted emission consists of differential mode and common mode noise. It is advantageous to know an estimate of emission level for each mode during the design phase so that suitable mitigation can be included earlier.. This paper aims to focus on a method to estimate the differential mode noise emission of a DC-DC converter. The estimation is computed using the input capacitor complex impedance and the current that flows through it. As a study case, a boost and buck converters are used for evaluation. The estimation and measurement results are compared. Despite differences at some frequencies, the estimated and measured results generally  agree well. Because of its simplicity, the proposed method can be used as a practical tool in the EMC aspect of DC-DC converter design.
Penerapan Metode Moving Average untuk Mengurangi Fluktuasi Daya pada Sistem Pembangkit Hibrida Ismail, Syaiful; Rachmildha, Tri Desmana; Hamdani, Deny
ELECTRON Jurnal Ilmiah Teknik Elektro Vol 5 No 2: Jurnal Electron, November 2024
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/electron.v5i2.79

Abstract

Along with the increasing use of solar photovoltaic (PV) panel technology in hybrid generation systems, several challenges must be faced. Some of these challenges are PV power fluctuations that will impact the operation of the generating system. To overcome these challenges, in the framework of this research, the Moving Average method is applied to the energy storage system in the form of a battery to balance the power fluctuations generated by PV solar cells that are channelled into the existing power system infrastructure. The Moving Average is applied to smooth the actual output power of PV by utilizing the control system on the converter connected to the DC Bus and integrating it with the AC system in the form of the MHP system and load. Batteries aim to absorb and release power to balance the PV power output and refer to the battery reference power generated by the Moving Average Method. The simulation results show that the performance of power smoothing using the Moving Average method has a significant impact compared to the conditions before applying the Moving Average technique. Thus, there is an increase in smoothing accuracy, and the power on the DC bus achieves stability to be supplied to the AC system. The successful application of the Moving Average method is closely related to the battery energy storage system, especially the converter and control system used. By reducing fluctuations, the goal of the hybrid generation system to overcome the uncertainty of energy supply can be achieved.
Peningkatan Umur Baterai pada PLTS Off-grid menggunakan Penyimpanan Energi Hibrida Berbasis Superkapasitor-Baterai Ihsan, Boy; Sahidin, Dwi; Rachmildha, Tri Desmana; Hamdani, Deny
E-JOINT (Electronica and Electrical Journal Of Innovation Technology) Vol. 5 No. 2 (2024): E-JOINT, Desember 2024
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/e-joint.v5i2.2560

Abstract

Perubahan iklim akibat pemanasan global menuntut penggunaan teknologi pembangkit listrik yang ramah lingkungan. Pembangkit Listrik Tenaga Surya (PLTS) merupakan salah satu pembangkit yang ramah lingkungan. Namun, pembangkit ini bersifat intermiten sehingga jika dioperasikan secara off-grid akan memerlukan perangkat penyimpanan energi. Paper ini merancang suatu sistem PV off-grid pada daerah 3T (tertinggal, terdepan, dan terluar) di Indonesia dengan menggunakan sistem penyimpan energi hibrida, yaitu baterai dan superkapasitor. Fluktuasi energi jangka pendek diutamakan ditangani oleh superkapasitor, sedangkan energi jangka panjang yang lebih stabil disuplai oleh baterai. Pendekatan ini bertujuan mengurangi stres dan siklus charge-discharge baterai, sehingga memperlambat degradasi baterai. Performa dari sistem ini diuji dengan melakukan pemodelan dan simulasi aliran energi pada MATLAB. Berdasarkan hasil simulasi, dilakukan prediksi umur baterai dengan menggunakan algoritma rain flow counting dan perhitungan Levelized Cost of Energy (LCOE) dari sistem pembangkit. Hasil penelitian menunjukkan bahwa penambahan superkapasitor pada sistem penyimpanan energi dapat menstabilkan transien daya dan mengurangi siklus charge-discharge baterai, sehingga memperpanjang umur baterai . Selain itu, LCOE pada sistem dengan superkapasitor lebih rendah daripada sistem tanpa superkapasitor.
Study and Design of Picohydro Power Plant for Low-Head and Low-Flow Application HAMDANI, DENY; EDYPOERWA, MUGNI LABIB
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 13, No 2: Published April 2025
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v13i2.200

Abstract

The global energy transition trend has driven the utilization of renewable energy from the surrounding environment, one of which is the irrigation water flow. Picohydro Power Plant (PLTPH) offers a solution to harvest kinetic and potential energy from water flow with low discharge and head. This study designed a PLTPH based on a classic water wheel equipped with an impulsive nozzle, a gradual intake pipe, a booster converter, an MPPT device, and a battery to ensure optimal and stable power output. With a water flow discharge of 0.4 m/s and a head of 80 cm, the PLTPH can generate up to 1,100 W, demonstrating the effectiveness of this technology in supporting energy transition and energy utilization in remote areas.
Co-Authors Aditia Nur Bakti Boy Ihsan Dwi Mandaris Edypoerwa, Mugni Labib Ery Safrianti Hutomo Wahyu Nugroho Ismail, Syaiful Isti Surjandari Sahidin, Dwi Tri Desmana Rachmildha, Tri Desmana Yoppy, Yoppy Yudhistira Yudhistira