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JMECS (Journal of Measurements, Electronics, Communications, and Systems)
Published by Universitas Telkom
ISSN : 24777994     EISSN : 24777986     DOI : https://doi.org/10.25124/jmecs.v6i1
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology
Journal of Measurements, Electronics, Communications, and Systems (JMECS) is a scientific open access journal featuring original works on communication, electronics, instrumentation, measurement, robotics, and security networking. The journal is managed by the School of Electrical Engineering and published by Telkom University. The target audience of JMECS are scientists and engineers engaged in research and development in the above-mentioned fields. JMECS publishes full papers and letters bi-annually in June and December with a high standard double blind review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities. All published articles are checked using ithenticate plagiarism checker software. The scopes include: ELECTRONICS (ELEC) Theory and Design of Circuits Biomedics COMMUNICATION SYSTEMS (COMS) Information Theory Source Coding Channel Coding Optical Communications Wireless Communications SIGNAL PROCESSING (SIGN) Signal and System Image Processing AUTOMATION AND ROBOTICS (AUTO) Industrial Automation Control Theory Control Systems INSTRUMENT AND MEASUREMENT (INST) Power systems Renewable energy Smart Building Sensors Acoustics MATERIAL AND DEVICES (MATE) Material for Electronics Nanomaterials Photonics NETWORKING AND SECURITY (NETW) Network Theory Communication Protocols Switching Internet of Things, ANTENNA AND MICROWAVE (ANTE) Antennas Propagations Nanosatellite Radar Remote Sensing Navigation ARTIFICIAL INTELLIGENCES (ARTI) Machine Learning Intelligent Transportation Systems
Arjuna Subject : Teknik (semua kategori) - Teknik Kontrol dan Sistem
Articles 57 Documents
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PARAMETRIC STUDY OF NATURAL DIELECTRIC MATERIALS THICKNESS IN WAVEGUIDE ANTENNA MODE TE10 COASTAL RADAR 3 GHz ANTENNA M. Reza Hidayat; Hidayat Ramdan; Handoko Rusiana Iskandar; Giri Angga Setia
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 8 No 2 (2021): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v8i2.4068

Abstract

Manufacturing process was important in the development of antenna technology in order to obtain the antenna optimal performance. One of the approaches to increase the antenna performance was to use a natural dielectric material. In this research, a waveguide antenna was designed by inserting a natural dielectric material, an FR-4-Epoxy (? = 4,3 in the simulator) into a waveguide with a width of 72 mm, a height of 34 mm, and a length of 50 mm. The properties of the mode waveguide antenna were modified by slightly varying the position of the dielectric material and adding an initial thickness of 1.6 mm. The excitation of the waveguide was configured using mode. The Observed paramters in this research are (return loss) and radiation parameters (gain and directivity). On the simulation shows that the best performance of the waveguide antenna was obtained when the dielectric position is 2 mm from the connector and thickness 3,2 mm. The simulation also generates the parameter of -22,8 dB with gain and directivity was 5,77 and 1,799 respectively at a frequency 3 of GHz while from measurement the frequency was shifted at 3,15 GHz with -23,05 . The result of this research shows that the addition of dielectric material to the waveguide antenna as a resonator will affect the antenna parameters this is due to the nature of the dielectric material which has a special permittivity value that changes the nature of the medium of wave propagation propagating on the antenna. From the observations in the simulation stage, the closer the position of the material to the connector and the thicker the material, the better the return loss, even though it slightly shifts the working frequency of the antenna from the initial frequency. Manufacturing process was important in the development of antenna technology in order to obtain the antenna optimal performance. One of the approaches to increase the antenna performance was to use a natural dielectric material. In this research, a waveguide antenna was designed by inserting a natural dielectric material, an FR-4-Epoxy (? = 4,3 in the simulator) into a waveguide with a width of 72 mm, a height of 34 mm, and a length of 50 mm. The properties of the mode waveguide antenna were modified by slightly varying the position of the dielectric material and adding an initial thickness of 1.6 mm. The excitation of the waveguide was configured using mode. The Observed paramters in this research are (return loss) and radiation parameters (gain and directivity). On the simulation shows that the best performance of the waveguide antenna was obtained when the dielectric position is 2 mm from the connector and thickness 3,2 mm. The simulation also generates the parameter of -22,8 dB with gain and directivity was 5,77 and 1,799 respectively at a frequency 3 of GHz while from measurement the frequency was shifted at 3,15 GHz with -23,05 . The result of this research shows that the addition of dielectric material to the waveguide antenna as a resonator will affect the antenna parameters this is due to the nature of the dielectric material which has a special permittivity value that changes the nature of the medium of wave propagation propagating on the antenna. From the observations in the simulation stage, the closer the position of the material to the connector and the thicker the material, the better the return loss, even though it slightly shifts the working frequency of the antenna from the initial frequency.
A Literature Survey of Human Activity Recognition Using Deep Learning and Nonparametric Model with Some Exchanges in Karl Popper’s Viewpoint and Kuhn’s Paradigm in Philosophy of Science Ig. Prasetya Dwi Wibawa; Meta Kallista; Ganga Ram Phaijoo
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 9 No 1 (2022): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v9i1.2408

Abstract

Human skeletal detection and human gesture recognition are interesting subjects that have been investigated during the past three decades. Single-RGB, RGB-D camera, and Initial Measurement Unit (IMU) are some of the sensors for recording human motion data. Numerous methods for gesture recognition and classification have been reviewed in this survey. The classification is divided into nonparametric models and deep learning models, which afterwards will be compared in terms of accuracy and running time, respectively. The feature extractions are separated based on features processed from the sensor data, including skeleton-based features, depth image-based features, and hybrid features. A comparison of accuracy values will be offered based on the model and its attributes. In addition, we present an interchange of perspectives on deep learning and nonparametric models based on Karl Popper’s perspective and Kuhn’s paradigm in the study of the philosophy of science. By substituting the falsification principle for induction, Popper attempts to refute the traditional empiricist perspective of the scientific method. From the philosophy of science’s perspective, the study on human action recognition is in the normal science phase according to Kuhn’s paradigm and is corroborated in accordance with Popper’s theory.
DESIGN AND REALIZATION OF WEARABLE ULTRAWIDEBAND ANTENNA TRIANGULAR PATCH FOR HEALTH APPLICATIONS WITH DEFECTED GROUND STRUCTURE METHODS HARFAN HIAN RYANU; Ruben Samuel Marojahan Purba; FARDAN FARDAN; Levy Olivia Nur; Bambang Setia Nugroho
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 9 No 1 (2022): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v9i1.4682

Abstract

Wearable antenna is currently a very popular topic because it has the advantages of small size, light weight, and flexible shape. Because of their versatility, wearable antennas are often used in healthcare, as well as military applications. In this research, a wearable triangular patch antenna is designed at the Industrial, Scientific, Medical (ISM Band) 2.4 GHz frequency using Cordura Delinova 2000 textile as a substrate and copper tape as a conductor for the patch and ground plane. To obtain ultra-wideband characteristics, the Defected Ground Structure technique is used. From the simulation results carried out under normal conditions, a bandwidth of 1403.9 MHz is obtained with a VSWR value of 1.004 and a gain of 2.355 dBi. By adding a phantom with hand characteristics, the simulation results show a bandwidth of 1354.1 MHz, VSWR 1.36, Gain 7.35 dBi, and SAR 0.4 W/Kg at a distance of 30 mm from the phantom. From the measurements made under normal conditions, a bandwidth of 684.3 MHz, a VSWR of 1.1045 and a gain of 2.01 dBi are obtained. From the on-body measurement using wrist, the antenna obtains a bandwidth of 615.2 MHz and VSWR of 1.4027, at a distance of 30 mm from the phantom. Based on the parameters obtained in the measurement and simulation, the antenna can be used in the 2.4 GHz frequency.
Modeling of Cavities Detection in The Tree Stemsection Using Radar Vector Network Analyzer (VNA) Elaborating Radon Transform Aldi Rivaldi Dwinanda; Bambang Setia Nugroho; Aloysius Adya Pramudita
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 9 No 1 (2022): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v9i1.5370

Abstract

Trees are one of the most useful plants for life on earth. However, trees can be harmful due to cavities in the stem sections. Rapid detection is needed to prevent several losses that may arise due to fallen trees. This research identified a hollow and non-hollow tree stem section of flamboyant tree with a sub-surface detection radar system. The sub surface detection radar system was modeled using a Vector Network Analyzer (VNA) connected to a Vivaldi antenna. VNA emitted electromagnetic waves to the tree stem section and subsequently propagated and penetrated hollow tree stem section. The propagation wave met the boundary plane between the wood and the cavity which reflected the electromagnetic waves. The reflected wave was caught by antenna and was display by the VNA as S-Parameter. This research used a Vivaldi antenna with a working frequency of 1 GHz – 10 GHz and a VNA with working frequency 300KHz - 8GHz. The difference in the amplitude of the signal could be seen from the results of cavity measurements made at one point. By implementing circular scanning method with inverse radon transformation, this research could identify a 19 cm diameter wood with a hole of 6 cm and 9.5 cm diameter filled with water, respectively. It was observed that the optimal detection was obtained by placing object between the antennas. This research has signified the application of radar modeled with VNA for detecting the cavities in tree stem section.
Automatic Fish Feeder on Unmanned Surface Vehicle with Automatic Control and Navigation FARIED IZZANTAMA NUGRAHA HARSWA; Angga Rusdinar; Rifqy Miftahul Hidayat; Fiky Yosep Suratman
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 9 No 1 (2022): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v9i1.5285

Abstract

Fish farming is common in Indonesia. The farmers usually use ponds with a large size for cultivation which have constraints on feeding due to their size. An automatic feed system with An Unmanned Surface Vehicle (USV) can be the solution to overcome this problem. The USV moves to the predetermined position and direction using GPS and compass. When it has arrived at that point this USV feeds the fishes according to the predetermined amount. In this study, the Pixhawk is used to control the USV to accomplish the given mission. It uses mission planner software for determination of the waypoint points, the calibration of components, and the control of PID. The Pixhawk also serves as a ground control station (GCS) for monitoring the motion and position of the USV using radio communication of 433MHz telemetry connected to the GCS and computer. The fish feeding system uses a load cell sensor to measure the weight of the feed to be thrown and two servo motors as a feed production system. Both sensor and servo motors are controlled by an Arduino UNO. The feed tank has a maximum capacity of 7.5 liters with 0.41 cm per kilogram buoyant force of the USV. The test was carried out on a pool of 10 × 10 m by placing 4 Waypoints. The USV has an average speed of 0.65 m/s and reaches a total distance of 55.5 m in 88 seconds. Before releasing to the pond, the feed weight is measured using a load cell sensor which has an accuracy of 98.99%. The difference between the set point and the feed released by the USV is very close, where the average error value is about 4.98%. The error value becomes smaller when more weight is set.
The Optical Properties of Sub-micrometer WS2 Preparing Using Electrochemical Fabrication Fuad Pratama; Ismudiati Puri Handayani; Edy Wibowo
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 9 No 1 (2022): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v9i1.5307

Abstract

Photonic band gap tunability is crucial in designing optoelectronic devices. Nanostructure semiconductors with tunable band gaps which depend on the dimensionality, have become the potential candidate for tunable nano optoelectronic devices. However, it has a lot of challenges in their fabrication such as the limited number of homogenous particles and high-cost production. As an alternative, sub-micrometer particles with the order of hundred nanometers are more easily fabricated and exhibit tunable optoelectronic properties. In this study, sub-micrometer WS2 was fabricated using low-cost electrochemical methods. Two clusters of particles with the average size of 100 nm and 600 nm are observed. The number of sub-micrometer particles increases with the increasing of fabrication time. The photoluminescence spectra show wide peak centered around 800 nm suggesting the possible application in visible light emitting devices. The peak position varies with the time variation showing that the optical properties might be tuned during fabrication. This study points out that simple solution processed fabrication method can produce sub micrometer particles with tunable optical properties.
Hypersonic Flight Control with Inverse Dynamics Approach using FlightGear A. W. Pahlevi; Erwin Susanto; M. R. Rosa
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 9 No 2 (2022): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v9i2.5077

Abstract

Hypersonic flight is one of the technological developments for aircraft with speeds above Mach 5, the speed at which air separation begins to become significant. This paper presents a control of hypersonic flight with inverse dynamics systems. Hypersonic Flight Control (HFC) is approached as system and controlled by inverse dynamics. The design of the proposed inverse dynamics equation aims to cancel all nonlinear terms so that the closed loop system is linear, so that we can simulate the system in The control strategy aims to change quickly and accurately. The simulation result deployed by MATLAB shows the effectiveness of the proposed control scheme. We include FlightGear simulation to visualize the aircraft’s 3D motion. MATLAB and Simulink can be used for inverse dynamics control of hypersonic aircraft, while FlightGear can be used to visualize aircraft motion, making it easier to observe and verify control effectiveness. In the simulation, we use an altitude of 1000 with the PD controller gains Kp = diag(10; 10; 10; 10; 10; 20) and Kd = diag(10; 10; 10; 10; 10; 1) that gives less oscillation for the proposed scenario. We focused our research on the control of the aircraft using the Vector Field approach so that it solves the standard local minima problem in the path following method. The urgency of this research is crucial because it can revolutionize aircraft navigation and serve as a reference for the development of unmanned aircraft, shaping the future of world aviation.
Skin Cancer Classification Malignant and Benign Using Convolutional Neural Network Nur Alyyu; Ratna Sari; R.Yunendah Nur Fuadah; Nor Kumalasari Caecar Pratiwi; Sofia Saidah
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 9 No 2 (2022): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v9i2.5724

Abstract

Skin cancer is one of the most deadly cancers. This cancer ranks third after cervical cancer and breast cancer in Indonesia. In detecting skin cancer, a dermatologist can carry out a biopsy. However, carrying out a biopsy requires a long time and preparation. Innovations to classify and detect skin cancer using artificial neural networks are overgrowing in helping doctors so that prompt and appropriate treatment can be carried out. The purpose of this project was to develop a system to classifying skin cancer using Convolutional Neural Networks (CNNs) and the ResNet50 architecture. This research examined the extent of system performance results using accuracy, recall, precision, and f1-score by doing several trials by changing the hyperparameters. The dataset used in this study was obtained online through Kaggle, with two classes, malignant and benign, divided into 80% training data and 20% test data. Based on the testing result, the best hyperparameter system was obtained using AdaMax optimizer, the learning rate was 0.0001, the batch size was 64, and the epoch was 50. In this research, The performance results values were 99% for precission, recall and f1-score. Simulation results show that this method with highly optimized hyperparameters can accurately classify malignant and benign skin cancer.
Microstrip Antenna Gain Enhancement using Multilayer Substrate and Superstrate Structure for Space-Based ADS-B Surveillance edwar EDWAR; Gilda Priscilla; Levy Olivia Nur; Putri Indra Wahyuningsih; Amanda Nurul Islam Ali
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 9 No 2 (2022): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v9i2.5707

Abstract

Aircraft traffic monitoring is an important part in increasing flight security. Automatic Dependent Surveillance Broadcast (ADS-B) is used to run this task. The authority usually uses ground-based ADS-B signal receiver to monitor the aircraft traffic. However, this system is unable to detect the aircraft position when it is in a remote area. -based ADS-B can be the solution to this problem with the increase in the surveillance coverage by installing the ADS-B receiver system on a satellite platform such a . To enable this system, a high gain antenna is needed. This paper investigated a superstrate multilayer microstrip antenna as a candidate for this technology. The multilayer substrate and superstrate structure were combined with a microstrip antenna to achieve a high gain performance without increasing the antenna dimension significantly. The multilayer method produced 4.327 dBi of antenna gain and it was rising into 4.946 dBi after being integrated with the superstrate layer by a computer simulation. The fabricated antenna gain was 4.505 dBi which was still considerably high compared to the other previous works. This antenna was designed by following the CubeSat form factor standard so it can be installed into the spacecraft easily.
Energy Efficient D2D Communication Under Downlink Heterogeneous Network Martinus Erico Noktafianus Hindarto; Nur Izza Rahma; Vinsensius Sigit Widhi Prabowo; Nachwan Mufti Adriansyah
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 9 No 2 (2022): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v9i2.5713

Abstract

The increase in cellular users (CU) caused data traffic congestion on the Base Station (BS). Device to Device (D2D) communication can be used to reduce the traffic on BS. D2D communication is direct communication between devices without using a central BS to reduce traffic congestion. CU and D2D users will share the same Resource Block (RB), but there is a drawback that causes interference. This study employs a downlink direction Heterogeneous Network (HetNet) system model to mitigate interference issues. Resource allocation is performed using a greedy algorithm, and to enhance its performance, two small cell base stations (SB) were incorporated, denoted as SB1 (1st SB) and SB2 (2nd SB), thereby transforming the algorithm into a greedy algorithm with SB1SB2. A comparative analysis was conducted between the greedy algorithm with SB1SB2 and the conventional greedy algorithm (without the addition of SB1 and SB2). Furthermore, the authors manipulated the radius of the macro cell base station (MB) in this study to examine its impact on system performance. The results obtained from the simulation are greedy with the SB1SB2 algorithm getting a lower value on the sum data rate with a value of 1.62 × 108 bps, spectral efficiency with a value of 9.02 bps/Hz, total fairness (CU and D2D) with a value of 0.4095. Meanwhile, in terms of power efficiency, the greedy algorithm with SB1SB2 has a higher value of 10.40%. However, resource allocation in both algorithms is not the best solution. So that the resulting performance parameters are less than optimal.

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