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International Conference on Electrical engineering, Computer Science and Informatics (EECSI)

作者： Rohana Rohana Surya Hardi Nasaruddin Nasaruddin Yuwaldi Away Doctoral Program. School of Engineering Universitas Syiah Kuala Banda Aceh Indonesia and Universitas Muhammadiyah Sumatera Utara Indonesia Dept. of Electrical Engineering Universitas Sumatera Utara Medan Indonesia Dept. of Electrical and Computer Engineering Universitas Syiah Kuala Banda Aceh Indonesia Dept. of Electrical and Computer Universitas Syiah Kuala Banda Aceh Indonesia

Solar energy is environmentally friendly energy with a very large energy source. Indonesia is also exploring and implementing renewable energy options including solar panels as a viable and long-term alternative to green technology. On the other hand, to get sufficient solar radiation, solar panel systems are generally located in open areas such as hillsides, deserts, and water surfaces, making them more vulnerable to lightning strikes. Lightning is one of the main threats to PLTS, a lot of damage to solar panels is caused by lightning. Direct and indirect lightning strikes have great potential to affect the entire solar panel farm system. The main objective of this study is to evaluate Lightning Protection System (LPS) modeling for network-connected solar panel (PV) farm systems using the ATP-EMTP software. Field observations and simulation tests are used to determine the position of the LPS and its installation structure. The rolling ball method is used to see the installed LPS protection radius. The results show that it is necessary to add LPS to the PV field. It was found that there was one additional LPS needed on the north side of the PV field, because that position was not protected by the radius of the lightning rod. From the simulation results, it was found that the LPS installation structure was good, because the results from the modeling of the isolated LPS lightning protection system were better to use than without installing LPS.

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Sub-Exact Sequence on Hilbert Space 3

Sub-Exact Sequence on Hilbert Space

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3rd International Conference on Applied Sciences Mathematics and Informatics, ICASMI 2020

作者： Utami, B.H.S. Fitriani Usman, M. Warsono Daoud, J.I. Doctoral Program of Mathematics and Natural Science Faculty of Mathematics and Natural Science University of Lampung Bandar Lampung Indonesia Department of Information System Stmik Pringsewu Pringsewu Indonesia Department of Science and Engineering Faculty of Engineering International Islamic University Malaysia P.O. Box 10 Kuala Lumpur50728 Malaysia

The notion of the sub-exact sequence is the generalization of exact sequence in algebra especially on a module. A module over a ring R is a generalization of the notion of vector space over a field F. Refers to a special vector space over field F when we have a complete inner product space, it is called a Hilbert space. A space is complete if every Cauchy sequence converges. Now, we introduce the sub-exact sequence on Hilbert space which can later be useful in statistics. This paper aims to investigate the properties of the sub-exact sequence and their relation to direct summand on Hilbert space. As the result, we get two properties of isometric isomorphism sub-exact sequence on Hilbert space. © Published under licence by IOP Publishing Ltd.

关键词： Hilbert spaces

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Estimating Path Loss of High-Speed Railway for the Case of Two Ray Ground Reflection Model

SSRN

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SSRN 2023年

作者： Lukman, Selvi Nazaruddin, Yul Yunazwin Ai, Bo Engineering Physics Doctoral Program Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia Instrumentation and Control Research Group Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China

In a mobile radio channel for High-Speed Railway (HSR), a single direct path from a free space propagation model is insufficient to provide an uninterrupted high-speed fault tolerance of communication networks heterogeneity. This study proposes a two ray ground reflection path loss model for HSR by contemplating both direct and ground reflected propagation path when the signal is propagating from the transmitter to the receiver. The model is theoretically suitable to overcome the interferences of far-field microcell urban environment for several kilometres distances. The proposed path loss model is validated by utilizing optimization technique of FPA (Flower Pollination Algorithm) and GBNN (Grey Box Neural Network). A comparison of objective functions and fitting plots visualization demonstrates excellent validation performances of both algorithms. However, GBNN predominates FPA in following the dynamic scenario of HSR. Accordingly, the achievement of GBNN is acceptable to put back into the proposed two ray ground path loss model and so it is becoming possible for network designers to design a power link budget in order to plan frequency path planning and small cells coverage area to fulfil the reliable services and train control operations. © 2023, The Authors. All rights reserved.

关键词： Budget control

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Numerical Experiment of Adding Patch Elements to X-band Microstrip Antennas

Numerical Experiment of Adding Patch Elements to X-band Micr...

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International RF and Microwave Conference, RFM

作者： Yusnita Rahayu Anhar Saktioto Irsan Taufik Ali Yussi Perdana Saputera M Novriza Teguh Praludi Department of Electrical Engineering Faculty of Engineering Universitas Riau Pekanbaru Indonesia Physics Dept. FMIPA Universitas Riau Pekanbaru Indonesia Doctoral Defense Post Graduate Program Universitas Brawijaya Malang Indonesia National Research and Innovation Agency Indonesia

This paper compares single microstrip antenna designs and microstrip arrays used for Manpack Radar with X-band frequency. Antenna array configurations were investigated for 1x2, 1x4, and 1x32 elements. A gain increase is required for each additional patch element. Patch dimensions are set at 9.17 x 10.10 x 0.035 mm. The parameters needed are X-Band frequency with gain >15 dBi, beamwidth angle of ≤5°, and bandwidth of more than 60 MHz. The simulation results show a good match with the target required for the 9.3 GHz frequency. The largest gain value numerically is obtained on the antenna with 32 patches, which is 17.1 dBi.

关键词： Radio frequency Microstrip antenna arrays Azimuth Simulation Microstrip antennas Radar Bandwidth

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Design and Calibration of Temperature Monitoring Device for a Cold Box with Hydrated Salts as Phase Change Material (PCM) 2nd

Design and Calibration of Temperature Monitoring Device for ...

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2nd International Conference on Experimental and Computational Mechanics in engineering, ICECME 2020

作者： Gunawati Nasruddin, M.N. Setiawan, Adi Sebayang, K. Makruf, A. Zakaria Doctoral Program in Physics Faculty of Mathematics and Natural Sciences Universitas Sumatera Utara Padang Bulan Medan20155 Indonesia Department of Physics Faculty of Mathematics and Natural Sciences Universitas Syiah Kuala Darussalam Banda Aceh23111 Indonesia Mechanical Engineering Department Faculty of Engineering Universitas Malikussaleh Bukit Indah Lhokseumawe24352 Indonesia

ISBN: (纸本)9789811607356

Development of Phase Change Material (PCM) for cold storage application requires devices for monitoring the changes in temperature during the charging and discharging processes. This device helps to understand the behaviour of PCM during the solidifying-liquefying process and predicts how long PCM can store the energy. The aims of this study were to design and prepare a temperature monitoring system using DS18B20 sensors for recording and displaying the temperature changes at six points within a box cooled by salt hydrate PCM. Thermistor types were used as temperature gauges due to their lower prices and flexibility. Six DS18B20 sensors were programmed with Arduino Uno as microcontroller. Output temperature measurement values in degrees Celsius were stored in a computer using PLX-DAQ software. Calibration of temperature measurement was performed by comparing the measurement results of the DS18B20 sensor and a commercial thermometer data logger using the Root Mean Square Error (RMSE) method. Results show that the first DS18B20 sensor was RMSE 1.75, the second sensor was 0.98, the third sensor was 1.2, the fourth sensor was 1.21, the fifth sensor was 1.24, and the sixth sensor was 1.7. The changes in temperature measured by the DS18B20 sensor were successfully recorded for three days without any interruption. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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Rice Variety Identification Using Edge Feature Extraction and Texture-Based Segmentation

Rice Variety Identification Using Edge Feature Extraction an...

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International Seminar on Application for Technology of Information and Communication (ISemantic)

作者： Aji Setiawan Kusworo Adi Catur Edi Widodo Doctoral Program of Information Systems School of Postgraduate Studies Diponegoro University Semarang Indonesia Department of Information Technology Faculty of Engineering Darma Persada University Jakarta Indonesia School of Postgraduate Studies Diponegoro University Semarang Indonesia Department of Physics Faculty of Science and Mathematics Diponegoro University Semarang Indonesia

This research proposes a methodology for identifying the optimal feature combination using Support Vector Machine (SVM) based on edge and texture features. Canny, Sobel, and Prewitt for edge detection and GLCM, Gabor, and LBP for texture analysis are popular feature extraction techniques widely employed in various cases. The approach combines edge and texture features with SVM to classify rice types into five categories: Ipsala, Jasmine, Karacadag, Arborio, and Basmati. Experimental results demonstrate that SVM using Canny, Sobel, and Prewitt combined Gabor texture features outperforms the comparative methods. A comparative analysis based on accuracy scores using confusion matrices is conducted. Combining all feature edge methods, Canny, Sobel, and Prewitt with Gabor on SVM classification is the best model for rice object classification, achieving an accuracy of 96%.

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Develop learning methods imr (integrated material realistic) alternative mathematics learning during a pandemic 7

Develop learning methods imr (integrated material realistic)...

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7th International Conference on Mathematics, Science, and Education 2020, ICMSE 2020

作者： Rusmana, I.M. Zainuri Wardono Nulhakim, A.L. Doctoral Program Universitas Negeri Semarang Indonesia Department of Mathematic Education Faculty of Mathematics and Natural Science Universitas Indraprasta Pgri Jakarta Indonesia Department of Mathematic Education Faculty of Mathematics and Natural Science Universitas Negeri Semarang Indonesia Department of Informatics Engineering Faculty of Engineering and Computer Science Universitas Indraprasta Pgri Jakarta Indonesia

The learning methods used by teachers in schools in Serang City are very ineffective, especially during the pandemic. This is because not integrated content of material in one subject with other subjects. Never mind between subjects, sometimes the material is not well integrated. The purpose of this study is to provide an alternative learning method during a pandemic, namely a method that integrates material with the realities of life which is abbreviated as IMR (Integrated Realistic Material). The method in this research is Research and Development (RnD) with the ADDIE model. In making this learning method according to the stages from the ADDIE study. The results of this study are in the form of learning methods that are integrated with the realities of life during the pandemic. © Published under licence by IOP Publishing Ltd.

关键词： Learning systems

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The air velocity’s comparation of different low ventilation heights in model buildings

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AIP Conference Proceedings 2024年第1期2710卷

作者： Augi Sekatia Erni Setyowati Gagoek Hardiman Doctoral Program of Architecture and Urbanism Universitas Diponegoro Semarang Indonesia Department of Architecture Faculty of Engineering Universitas Diponegoro Semarang Indonesia

Passive cooling systems in buildings are inseparable from thermal comfort, particularly in regions with tropical climates. Natural Ventilation (NV) as one of the passive cooling systems can be the solution to issues of thermal comfort and energy conservation as it is proven to achieve thermal comfort in a building. Low ventilation is one of the Natural Ventilation systems that is proven to increase indoor air velocity and thermal comfort in a building. This study examines how the height of low ventilation affects indoor air velocity and thermal comfort in a building model with dimensions 2.5 m x 2.5 m. The research employed 180 data of indoor and outdoor air velocity (m/s) with an interval of 1 minute for each height of vents. The heights of the low ventilation in the research are 10 cm, 40 cm, and 70 cm from the floor surface of the model building. From 540 data, it is concluded that with relatively the same wind speed, the low ventilation with a height of 10 cm has the highest air velocity. The lowest air velocity is obtained from the low ventilation with the highest height, which is 70 cm. The research significance is to give a new consideration of the location of the vent holes, particularly low ventilation holes. With their effectiveness in increasing the air velocity, thermal comfort in the building can also be achieved without the use of an active cooling system.

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Video-Based Container Tracking System Using Deep Learning

Video-Based Container Tracking System Using Deep Learning

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International Conference on Cyber Physical, Computer and Automation Systems, CPCAS 2019

作者： Rahmat, Basuki Via, Yisti Vita Wasian, Abdullah Purbasari, Intan Yuniar Sari, Ni Ketut Wurjani, Widi Bandong, Steven Joelianto, Endra Siregar, Persaulian Faculty of Computer Science Universitas Pembangunan Nasional "Veteran" Jawa Timur Surabaya Indonesia Engineering Physics Doctoral Program Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia Instrumentation and Control Research Group Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia

ISBN: (纸本)9789813340619

The process of loading and unloading containers at the port is very important to be automated in order to increase productivity, revenues, efficiency and safety in the logistics transportation process especially in a maritime country like Indonesia. To achieve this, identification and tracking of container positions need to be done accurately so that container transfers can occur precisely and smoothly. In this study, YOLO deep learning is used to detect moving containers. The model is trained using container images, and then the validation and testing process are carried out on the model using other container images. The results of training are stored in several checkpoints which will be compared to get the most accurate model. Obtained YOLO gave good results for tracking containers with MAP value of 68.63% and LAMR of 0.31. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Containers

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Modeling and analysis of three-phase active power filter integrated photovoltaic as a reactive power compensator using the simulink matlab tool 5

Modeling and analysis of three-phase active power filter int...

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5th International Conference on Informatics and Computing, ICIC 2020

作者： Setiyono Arief Sudiro, Sunny Prasetyo Wibowo, Eri Department of Electrical Engineering Gunadarma University Jakarta Indonesia Jakarta Indonesia Stmik Jakarta Stik Jakarta Indonesia It Doctoral Program Gunadarma University Jakarta Indonesia

ISBN: (纸本)9781728180472

This paper presents an analysis of the modeling of reactive power compensation using renewable energy from sunlight through photovoltaic to eliminate harmonic signals in the electricity network with a three-phase active power system filter. Electric energy supply comes from three-phase electricity sources in the form of a sinusoid. Non-linear loads such as electronic devices and electrical equipment connected to the grid generate harmonics signals;can make the format of electrical energy distorted. This nonlinear load draws electric current in the form of non-sinusoid. This format increases Total Harmonic Distortion (THD), thereby worsening the performance of electrical equipment. An active power filter is a very effective method in reducing harmonics signals and increasing the quality performance of electricity. This power filter works by injecting compensation current into the grid. The energy that is injected comes from the direct current output voltage (DC) of the photovoltaic link stored in the capacitor via a Voltage Source Inverter (VSI) switch. The compensation current has the same format as the harmonics current but differs in 180°. The main parts of this power filter include the Reference Signal Generating Unit, PI Controller, VSI Switch Signal Ignition Gate Generator, Energy Storage Circuit (Battery), and Photovoltaic. Simulation modeling using Matlab Simulink Tools to reduce THD levels by IEEE 519 standards. Simulation results show a significant decrease in Total Harmonic Distortion (THD), where the grid before compensation contains THD of 29.74% and after injection of 2.25%. So this modeling is worth proposing as an active filter in a power system. © 2020 IEEE.

关键词： Simulink

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