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Offsets Reconstruction Method for Clock Skew Measurement Over High-Jitter Communication

SN Computer Science 2025年第5期6卷 1-14页

作者： Sastra, Nyoman Putra Saputra, Komang Oka Teng, Wei-Chung Study Program of Electrical Engineering Faculty of Engineering Udayana University Jalan Raya Kampus Bukit Jimbaran Bali Badung 80361 Indonesia Department of Computer Science and Information Engineering National Taiwan University of Science and Technology No. 43 Section 4 Keelung Rd Taipei 106 China

Measuring clock skew of devices over a network fully relies on the offsets, the differences between sending and receiving times. Offsets that shape a thick line are the most ideal one as their slope is directly the clock skew sought. When some outliers separate from the thick line due to higher delay jitter, current advanced approaches use the lower bound or the majority of offsets to derive accurate clock skew. However, outliers in offsets that shape parallel dotted lines, reduce the availability of offsets in the lower region, and scatter widely the offsets from their majority zone. These conditions drive the current skew estimation approaches to lose their accuracy. This paper then developed a new method, which reconstructs back the outliers into their origin positions, in order to provide ideal offsets for clock skew measurement. The experimental evaluations have demonstrated that the clock skew accuracy of dotted-lines offsets tampered by outliers was improved from 2.1 to 0.9 ppm by the proposed reconstruction method. For a broader purpose, the reconstruction method has been adjusted to be implemented also on non-dotted-lines offsets. The robustness of the proposed method for this case has also been exhibited by the very ideal reconstructed offsets that shape like a thick line. © The Author(s) 2025.

关键词： Clock skew Delay jitter Dotted lines Hough transform

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Prototyping an IoT -Based Smart Controlled Poultry Farm System

Prototyping an IoT -Based Smart Controlled Poultry Farm Syst...

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Technology Innovation and Its Applications (ICTIIA), International Conference on

作者： Indra Hartarto Tambunan Noel Riki Apryanto Electrical Engineering Study Program Institut Teknologi Del Laguboti Indonesia

ISBN: (数字)9798350351613

ISBN: (纸本)9798350351620

This article presents the development and implementation of an Internet of Things (IoT) based Smart Controlled Poultry Farm Management System to enhance the efficiency and welfare of day-old chicks. The system prototype employs a DS18B20 temperature sensor and a microcontroller to automatically monitor and regulate the temperature, feeding, and drinking processes within the cage. Additionally, a web platform is provided for real-time condition monitoring informing the owner of any problems that may occurred. Temperature within the cage is maintained in the range of 30°C to 35°C with a measurement error rate of ±1°C. This temperature range is controlled by switching the fan on and off, as well as opening and closing the curtain. Experimental results indicate that the system has the potential to improve the efficiency of maintaining optimal chick weight and temperature, as well as ensuring consistent feeding times, all of which are crucial for sustainable poultry production. These parameters were monitored over a period of 21 days.

关键词： Temperature measurement Temperature sensors Temperature distribution Technological innovation Switches Control systems Real-time systems Temperature control Internet of Things Monitoring

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Performance of DCT-DWT Feature Extraction in Recognizing Guitar Chords

Performance of DCT-DWT Feature Extraction in Recognizing Gui...

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electrical engineering (FORTEI-ICEE), FORTEI-International Conference on

作者： Linggo Sumarno Electrical Engineering Study Program Sanata Dharma University Yogyakarta Indonesia

ISBN: (数字)9798331542207

ISBN: (纸本)9798331542214

This work deals with optimization problems in the field of audio signals with particular emphasis on recognizing guitar chords. As an extension to the previous works done in this field, the primary goal was to minimize the feature extraction length without loss of recognition performance. In this case, this work used two such well known methods in audio signal processing as the Discrete Cosine Transform (DCT) and the Discrete Wavelet Transform (DWT). This method is based on the iterative analysis of three main system attributes: the frame blocking length; the choice of wavelet functions; and the DWT coefficient selection offset. After careful tuning of these parameters, this work was able to optimize the feature extraction length to only three, which however represents a modest improvement on the previous works in this field. The system developed in this research obtained recognition accuracy of up to 91.43% when the optimized feature extraction length was employed. The significance of this study extends to the non-conventional applications of guitar chord recognition. Shortening the feature extraction length is expected to improve more usages in the different applications of the music technology.

关键词： electrical engineering Accuracy Feature extraction Wavelet analysis Machine listening Discrete wavelet transforms Discrete cosine transforms Iterative methods Tuning Optimization

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Feasibility Analysis of Floating Solar Power Plant at Muara Nusa Dua Reservoir in Bali

Feasibility Analysis of Floating Solar Power Plant at Muara ...

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International Conference on Smart Computing & Communications (ICSCC)

作者： I Wayan Sukadana Richard Benjamin Otniel S I Wayan Sugara Yasa I Wayan Sutama Dewa Ayu Putu Adhiya Garini Putri Electrical Engineering Study Program Universitas Pendidikan Nasional Denpasar Indonesia

ISBN: (数字)9798350363104

ISBN: (纸本)9798350363111

Renewable energy is a key focus of government policy aimed at reducing dependence on fossil fuels. In alignment with the Renewable Energy mix target and government initiatives promoting solar power, PLN Indonesia Power Bali PGU has installed a floating solar power plant on the surface of the Muara Nusa Dua reservoir. The 100 kWp floating solar power plant at Muara Nusa Dua serves as a showcase project for the G20 activities in Bali. This study presents a feasibility analysis of the 100 kWp Floating Solar Power Plant in the Muara Nusa Dua reservoir, conducted by PLN Indonesia Power Bali PGU from both technical and economic perspectives. Data collection involved real-time monitoring of energy production from October 2022 onwards and detailed tracking of monthly investment costs for the PLTS. Simulation results indicate that the PLTS can generate 145,930.08 kWh annually, yielding an economic benefit of approximately Rp. 236,406,730.00 per year. The analysis concludes that the 100 kWp Muara Nusa Dua Floating PLTS is viable and beneficial both technically and economically.

关键词： Government policies Renewable energy sources Simulation Production Reservoirs Real-time systems Fossil fuels Reliability Power generation Investment

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Multiplayer Ludo Game Application Based on Mixed Reality Using UrhoSharp and RabbitMQ Message Broker 9

Multiplayer Ludo Game Application Based on Mixed Reality Usi...

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9th International Conference on Wireless and Telematics, ICWT 2023

作者： Sukoco, Agus Apriliansyah, Aghil Alfhauzhi Nurmalasari, Rin Rin Pratama, Vitradisa Prihatmanto, Ary Setijadi Juhana, Agus School of Electrical Engineering and Informatics Institut Teknologi Bandung Bandung Indonesia Uin Sunan Gunung Djati Department of Electrical Engineering Bandung Indonesia Universitas Pendidikan Indonesia Multimedia Education Study Program Bandung Indonesia

ISBN: (纸本)9798350305029

This paper describes the design and implementation of the Ludo game on Microsoft Hololens to create a mixed reality-based application with Hololens technology connected to many services. The Ludo game is made for two players, with player one playing on Hololens and player two sending and receiving player one's data via the console. The Ludo game with Hololens is one of the results of the development of Hololens technology and the RabbitMQ Messaging Server. The Ludo game is made on Visual Studio software using UrhoSharp Framework and RabbitMQ Messaging Server service with the AMQP protocol. As application frameworks, Hololens and UrhoSharp function as devices for visualization and running games. At the same time, the RabbitMQ Messaging Server and AMQP protocol serve as services that connect two players from the Hololens and console by sending the data needed by the application. The test results show that Hololens is running successfully and communicating with other console players. Thus, the results obtained are the purpose of this paper, which is to create a mixed reality-based application with Hololens technology connected to many services. © 2023 IEEE.

关键词： Mixed reality

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Real-Time Hand Gesture Recognition for Humanoid Robot Control Using Python CVZone 7th

Real-Time Hand Gesture Recognition for Humanoid Robot Contro...

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7th International Conference on Smart City Applications, SCA 2022

作者： Baihaqi, Muhammad Yeza Vincent Simatupang, Joni Welman Graduate Institute of Automation and Control College of Engineering National Taiwan University of Science and Technology Taipei Taiwan School of Electrical Engineering and Informatics Institut Teknologi Bandung Bandung Indonesia Study Program of Electrical Engineering President University Bekasi Indonesia

ISBN: (纸本)9783031268519

Humanoid robot is able to mimic repetitive activities done by human. By having them, humans can focus on tasks that require extra focus, while leaving the simple one to be done by humanoid robot. To extend the functionality of the 3D-printed upper-body humanoid robot, a camera along with a machine learning algorithm is implemented. In this case, their responses can be categorized based on the gesture it sees. In this paper, the authors evaluate the performance of an upper-body humanoid robot that implements CVZone. The method of evaluation is conducted under three different distances, and each distance has three different brightness levels. It is found that the success rate is highest at the shortest distance which is 50 cm, and under medium-lighted environment. As the distance increases, the hand gesture gets harder to differentiate. At the same time, low or high brightness environment makes the image that contain hand gesture hard to interpret, thus lowering the success rate. Finally, hand gesture that involves third and little finger has the lowest success rate of 75%, while the movement that involves three fingers simultaneously has the second lowest success rate of 80.9%. Meanwhile, simple hand gesture such as clenched-fist or lifting a thumb has 100% success rate under all condition. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Anthropomorphic robots

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System Design of Microcontroller Based Smart Automatic Transfer Switch of Solar Panel Control

System Design of Microcontroller Based Smart Automatic Trans...

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International Conference on Smart Green Technology in electrical and Information Systems (ICSGTEIS)

作者： I Wayan Sukadana Ida Ayu Dwi Giriantari Wayan Gede Ariastina Ida Bagus Alit Swamardika Agus Putu Abiyasa Electrical Engineering Study Program Universitas Pendidikan Nasional Denpasar Indonesia Electrical Engineering Study Program Universitas Udayana Denpasar Indonesia

Solar energy is a renewable energy that is currently being widely used. In general, independent solar power plant systems that are installed in residential homes use an off-grid system to simplify the installation process. However, the off-grid system has a weakness that the load on the independent solar power plant system would be limited and it is difficult to transfer the source of electrical energy when the storage battery capacity on the solar panel has run out. Transferring the source of electrical energy can be conducted but the load will be in a momentary blackout during the load transfer process. This would have a negative impact on sensitive loads such as compressors and refrigerators. To avoid the problem, a system for transferring electrical energy sources is required using the phase synchronization method at the source that will change by using the ESP32 as a control center which has supporting functions such as reading parameters, calculating the amount of electrical power used, recording data (data logging), and storing data on electronic media such as MicroSD Card. The result of this study was a Smart ATS system design that could transfer loads with a power rating of 450W using a source synchronization method that was able to display parameter data and record data regularly every 10 minutes. After testing the system, a saving value in the use of electrical energy was obtained by 0.1 kWh of the total use of 0.5kWh in which that the system created could save 20% of the use of electrical energy

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Optimizing Indoor Vertical Farming with DDPG Reinforcement Learning: Enhancing Control of Nutrient Levels, Climate Conditions, and Plant Health 5

Optimizing Indoor Vertical Farming with DDPG Reinforcement L...

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5th IEEE International Conference on Technology, Informatics, Management, engineering and Environment, TIME-E 2024

作者： Albert Panggabean, Good Fried Romadhon, Rahmat Lubis, Ramot Joelianto, Endra Institut Teknologi Bandung Doctoral Program in Engineering Physics Bandung Indonesia Institut Teknologi Del Faculty of Informatics and Electrical Engineering Toba Indonesia Institut Teknologi Bandung Engineering Physics Study Program Bandung Indonesia Institut Teknologi Bandung Instrumentation Control and Automation Research Group Bandung Indonesia

ISBN: (纸本)9798350364743

In indoor vertical farming systems, managing dynamic and complex environments poses significant challenges. Traditional control strategies often fall short in adapting to rapid changes in critical parameters such as nutrient levels, climate conditions, and plant health indicators. To address these challenges, this paper presents a novel approach for optimizing indoor vertical farming using Deep Deterministic Policy Gradient (DDPG), a reinforcement learning algorithm well-suited for environments with continuous action spaces. Our study focused on the control and monitoring of key parameters, including nutrient levels (pH and EC), climate conditions (temperature, humidity, light, and CO2 levels), and plant health indicators (biomass accumulation and leaf size structure). By defining a comprehensive state and action space, we simulated an indoor farming environment and trained the DDPG model to maximize crop yield and health. © 2024 IEEE.

关键词： DDPG indoor vertical farming precision agriculture reinforcement learning smart farming

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Optimizing Methylammonium Tin Iodide-based Perovskite Solar Cells with Different Hole Transport Materials

Optimizing Methylammonium Tin Iodide-based Perovskite Solar ...

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IEEE International Conference on Semiconductor Electronics (ICSE)

作者： Budi Mulyanti Jahril Nur Fauzan Chandra Wulandari Lilik Hasanah Roer Eka Pawinanto Study Program of Electrical Engineering Universitas Pendidikan Indonesia Bandung Indonesia Study Program of Electrical Engineering Education Universitas Pendidikan Indonesia Bandung Indonesia Study Program of Physics Institut Teknologi Bandung Bandung Indonesia Study Program of Physics Universitas Pendidikan Indonesia Bandung Indonesia Study Program of Industrial Automation and Robotics Engineering Education Universitas Pendidikan Indonesia Bandung Indonesia

ISBN: (数字)9798350378313

ISBN: (纸本)9798350378320

Perovskite materials have garnered significant attention in the field of solar cell applications due to their highly promising performance. However, the utilization of lead (Pb) as the primary material in perovskite solar cells has been associated to health and environmental hazards. Consequently an alternative material for lead is necessary in order to develop environmentally friendly and high-efficiency solar cells. The reported efficiency value still necessitates further enhancement, indicating that the development of lead-free solar cells requires improvement. Methylammonium tin iodide (MaSnI 3 ), a lead-free perovskite compound, can be utilized as a substitute for lead halide-based solar cells. This substitution is possible since MaSnI 3 is stable, non-toxic, and has a high efficiency. The simulation was conducted by the Solar Cell Capacitance Simulator (SCAPS-1D), employing the AM 1.5G spectrum. The primary objective of this research is to enhance the performance of the hole transport layer materials in order to achieve a high power conversion efficiency (PCE) using MaSnI 3 material. Organic and inorganic HTL such as CuSBS, PEDOT:PSS+WO 3 , Spiro-OMeTAD, P3HT, NiO, Cul, SrCu 2 O 2 and PTAA are required in our simulations. These materials were selected to explore their potential in optimizing device performance due to their distinct properties, such as conductivity, stability, and compatibility with MaSnI3. Regarding HTM performance for device construction, our modelling results indicate that the 100 nm CuSBS 2 layer works better. We have found that by using the configuration of ITO/TIO 2 /MASnI 3 /CuSBS 2 /Au, a PCE of 27.67% with a Voc of 0.97 V can be achieved.

关键词： Performance evaluation Semiconductor device modeling Photovoltaic cells Lead Tin Perovskites Stability analysis

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Batik Industrial Waste Monitoring and Control System Based on the Internet of Things 5

Batik Industrial Waste Monitoring and Control System Based o...

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5th International Conference on electrical, Electronics, Informatics, and Vocational Education, ICEELINVO 2022

作者： Ali, M. Firdaus, M.F. Electrical Engineering Education Department Faculty of Engineering Universitas Negeri Yogyakarta Indonesia Electrical Study Program Vocational School Universitas Negeri Yogyakarta Indonesia

The aims of this research are to (1) Design and build a Batik Industrial Waste Monitoring and Control System Based on the Internet of Things (BIWMCS -IoT);(2) Test the performance of the BIWMCS-IoT system. The design and implementation of the BIWMCS-IoT system consist of five stages, namely: (1) Needs analysis, (2) Design, consisting of electronic planning, hardware, and software;(3) Development, including hardware and software development;(4) Testing, and (5) implementation. The BIWMCS-IoT system consists of a sensor unit to measure the parameters of water turbidity, temperature, Power of Hydrogen (pH), and the flow velocity of the wastewater then obtained by the microcontroller and the results are sent to the Wi-Fi module to adjust the solenoid valve opening and closing. Based on the testing of the system, has been shown that the BIWMCS-IoT system can work well according to the standards in the Minister of Indonesian Environment Regulation Number 05 of 2014. The reading accuracy of the batik waste monitoring system reaches 96.6% with the delivery time to the smartphone less than 30 seconds. This shows that this system can work well to monitor and control the liquid waste produced by the batik industry. © Published under licence by IOP Publishing Ltd.

关键词： Internet of things

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