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30,547 Article Results

Wind direction sensor based on thermal anemometer for olfactory mobile robot

10.11591/ijeecs.v13.i2.pp475-484
Helmy Widyantara , Muhammad Rivai , Djoko Purwanto
A wind direction sensor has been implemented for many applications, such as navigation, weather, and air pollution monitoring. In an odor tracking system, the wind plays the important role to carry gas from its source. Therefore, the precise, low-cost, and effective wind direction sensor is required to trace the gas source. In this study, a new design of wind direction sensor has been developed using thermal anemometer principle with the main component of the positive temperature coefficient thermistor. Three anemometers each of which has different directions are used as inputs for the neural network to determine the direction of the wind automatically.The experimental results show that the wind sensor system is able to detect twelve wind directions. A mobile robot equipped with this sensor system can navigate to a wind source in the open air with a success rate of 80%.This system is expected to increase the success rate of the mobile robot in searching for dangerous leaking gas in the open air.
Volume: 13
Issue: 2
Page: 475-484
Publish at: 2019-02-01

Quartz crystal microbalance based electronic nose system implemented on Field Programmable Gate Array

10.12928/telkomnika.v17i1.10133
Misbah; Institut Teknologi Sepuluh Nopember Misbah , Muhammad; Institut Teknologi Sepuluh Nopember Rivai , Fredy; Institut Teknologi Sepuluh Nopember Kurniawan
Nowadays, an electronic nose becomes an important tool for detecting gas. The electronic nose consists of gas sensor array combined with neural networks to recognize patterns of the sensor array. Currently, the implementation of the neural network on the electronic nose systems still use personal computer so that less flexible or not portable. This paper discusses the electronic nose system implemented in a Field Programmable Gate Array (FPGA). The sensor array consists of eight Quartz Crystal Microbalance (QCM) coated with chemical materials. The eight channel-frequency counter is used to measure the frequency change of the sensor due to the presence of gas adsorbed to the surfaces. The bipolar sigmoid activation function used in the neuron model is approximated by a second order equation. The experimental result showed that the electronic nose system could recognize all the types of gas with 92% success rate.
Volume: 17
Issue: 1
Page: 370-376
Publish at: 2019-02-01

High secure buffer based physical unclonable functions (PUF’s) for device authentication

10.12928/telkomnika.v17i1.10436
Sadulla; Vignan's Foundation for Science Shaik , Anil Kumar; Vignan's Foundation for Science Kurra , A.; Vignan's Foundation for Science Surendar
Physical Unclonable Function (PUF) is fast growing technology which utilizes the statistical variability of the manufacture variations acts as a finger print to the each device. It can be widely used in security applications such as device authentication, key generation and Intellectual Property (IP) protection. Due to the simplicity and low cost arbiter delay based PUFs have been mostly used as a cryptographic key in Internet of Things (IoT) devices. As conventional arbiter PUFs are suffers from less uniqueness and reliability. This paper provides designing of new buffer based arbiter PUF. It has been demonstrated that experimental results of new buffer based arbiter PUF shows the considerable improvement in the uniqueness and reliability of the proposed design and the Monte-Carlo analysis applied for delay variability of the PUFs.
Volume: 17
Issue: 1
Page: 377-383
Publish at: 2019-02-01

Implementation of an ARM-based system using a Xilinx ZYNQ SoC

10.11591/ijeecs.v13.i2.pp485-491
Omar Salem Baans , Asral Bahari Jambek
ARM processors are widely used in embedded systems. They are often implemented as microcontrollers, field-programmable gate arrays (FPGAs) or systems-on-chip. In this paper, a variety of ARM processor platform implementations are reviewed, such as implementation into a microcontroller, a system-on-chip and a hybrid ARM-FPGA platform. Furthermore, the implementation of a specific ARM processor, the Cortex-A9 processor, into a system-on-chip (SoC) on an FPGA is discussed using Xilinx’s Vivado and SDK software system and execution on a Xilinx Zynq Board.
Volume: 13
Issue: 2
Page: 485-491
Publish at: 2019-02-01

The use of mobile-assisted virtual reality in fear of darkness therapy

10.12928/telkomnika.v17i1.11614
Erick; Universitas Padjadjaran Paulus , Mira; Universitas Padjadjaran Suryani , Puspita Adhi Kusuma; Universitas Padjadjaran Wijayanti , Firdaus Perdana; Universitas Padjadjaran Yusuf , Aulia; Universitas Padjadjaran Iskandarsyah
Fear of darkness is a common psychological problem that may extent to a specific phobia if it is not treated well. Several intervention techniques related to fear and phobia using actual exposure therapy have been studied for decades, however, there were some constraints emerged when the therapist provides a real environment to overcome the patient's reaction to his/her specific fear. Virtual reality (VR) technology is an innovative tool providing a more immersive, secure, personal, and controlled virtual environment. Therefore, we developed a novel framework for treating the fear of darkness named Mobile-assisted Virtual Reality (MAVR). The purpose of this study was to evaluate the use of MAVR to treat fear of darkness based on usability, time consumption and its ability to decrease fear. We used the GOMS model as an interaction guidance between human and computer which aimed to facilitate the process of re-learning in mindset change and individual’s behavioral toward situation of darkness and night. Therefore, a comprehensive evaluation was conducted to measure the efficacy of the MAVR. We developed the usability assessment checklist to assess the feasibility and acceptability of the MAVR, and fear of darkness thermometer to measure the degree of fear. The Wilcoxon Signed Rank Test showed that the fear of darkness was significantly decreased after participants received the MAVR therapy (z=-3.550, p-value<0.001). We found that the MAVR was very useful, easy to be used and acceptable for participants. In conclusion, this study highlights the efficacy of Mobile-assisted Virtual Reality in treating specific fear, and it seems that Virtual Reality technology has a promising benefit to be implemented for other fear or specific phobia and also used in other psychological treatment.
Volume: 17
Issue: 1
Page: 282-290
Publish at: 2019-02-01

Evaluation of network security based on next generation intrusion prevention system

10.12928/telkomnika.v17i1.9191
Gilang Intan Permatasari; Bina Nusantara University Duppa , Nico; Bina Nusantara University Surantha
Next Generation Intrusion Prevention System (NGIPS) is a system that works to monitor network traffic, to detect suspicious activity, and to conduct early prevention toward intrusion that can cause network does not run as it supposed to be, NGIPS provides vulnerability protection broader compared to the traditional IPS, especially in the application layer that has ability to detect and learn vulnerability asset and carried out layering inspection until layer 7 packet. This paper intended to analyze and evaluate the NGIPS to protect network from penetration system that utilize the weakness from firewall, that is exploitation to HTTP port. By the existence of NGIPS, it is expected can improve the network security, also network administrator could monitor and detect the threats rapidly. Research method includes scenario and topology penetration testing plan. The result of this research is the evaluation of penetration testing that utilizes HTTP port to exploit through malicious domain. The evaluation conducted to ensure the NGIPS system can secure the network environment through penetration testing. This study can be concluded that it can become reference to optimize network security with NGIPS as network security layer.
Volume: 17
Issue: 1
Page: 39-48
Publish at: 2019-02-01

Single-layer performance of sugarcane bagasse- and rubber tire dust microwave absorber in narrow band frequency of 3.85 GHz to 8.2 GHz

10.11591/ijeecs.v13.i2.pp737-743
L. Zahid , M. Jusoh , N. H. Ghazali , Sabapathy Sabapathy , M. Mustapa , A. K Rahman
In this paper, the single and flat layer of microwave absorber has been fabricated with different weight percentage of sugarcane bagasse (SCB) and rubber tire dust (RTD). The dielectric properties and wave propagation have been investigated in this work. There are two different designs in developing this layer of microwave absorber. In this work, the targeted frequency is within 3.85 GHz to 8.2 GHz. The preference was based on the fact that our goal was to achieve minimum backward reflections, and the sugarcane bagasse material, with its low dielectric constant, high loss factor, large attenuation per unit length, and ease of fabrication, provided a better opportunity to achieve that goal which is better than -10dB (90 % of absorption).
Volume: 13
Issue: 2
Page: 737-743
Publish at: 2019-02-01

2.45 GHz rectenna with high gain for RF energy harvesting

10.12928/telkomnika.v17i1.11592
Maizatul Alice Meor; Universiti Teknikal Malaysia Melaka (UTeM) Said , Zahriladha; Universiti Teknikal Malaysia Melaka (UTeM) Zakaria , Mohd Nor; Universiti Teknikal Malaysia Melaka (UTeM) Husain , Mohamad Harris; Universiti Teknikal Malaysia Melaka (UTeM) Misran , Faza Syahirah Mohd; Universiti Teknikal Malaysia Melaka (UTeM) Noor
This paper presents a high gain rectenna at 2.45 GHz. Two layers low cost FR4 substrate has been used with air-gap technology for this fabricated rectenna. The proposed designs contain antenna and  open stub rectifying circuits with feedline. With the dimension of 100 x 100 x 5 mm3, this rectenna can perform high gain. The technique of air gap approach has been used for this proposed rectenna design so as to increase the antenna gain. Second and third harmonics has been eliminated by the introducing of triangular slot and ground plane to the developed design. The proposed rectenna successfully achieved the output voltages reaches 0.46 V when the input power is 0 dBm respectively when  the input power range is between -25 to 30 dBm. It is also can reach up to 6V when the maximum input power is applied. High gain, simple design, low profile and easy integration are the main advantages of this design of the rectenna when compared to past researchers.
Volume: 17
Issue: 1
Page: 384-391
Publish at: 2019-02-01

Energy scavenging using vibrations from bluetooth controlled DC motor

10.12928/telkomnika.v17i1.11638
Ankita H; Shri Ramdeobaba College Harkare , Sagar; Shri Ramdeobaba College Welekar , Abhishek; Shri Ramdeobaba College Maheshwari , Suraj; Shri Ramdeobaba College Motwani , Saket; Shri Ramdeobaba College Soholkar
Wide spectrum of research for application-based solutions has grown due to the requirement of automation of general electrical appliances. A low-cost solution is presented in this paper to control DC motor using Bluetooth module and controlled by an ARM processor. The main objective here is to build an efficient closed loop system which is wirelessly controlled by ARM processor 2103 using Bluetooth module and Bluetooth dongle. The system suggested here is expandable and can be integrated with latest technologies as well. The paper gives the details of the prototype for home automation system and gives the expected results with 0.1% tolerance. It also suggests the ways to integrate this system with the mobile phones and hence control the devices with the mobile handsets. The vibration frequency of the DC motor is used to generate electrical potential using MEMS tecnonlogy. A novel idea of self powered DC motor is thus presented by installing MEMS based energy harvester on the motor shaft.
Volume: 17
Issue: 1
Page: 481-488
Publish at: 2019-02-01

Optimization of video quality via fuzzy logic base adaptive media playout

10.11591/ijeecs.v13.i2.pp527-533
Farij Ehtiba , Badlishah Ahmad , Mostafijur Rahman
This paper addresses the issue of interruption of Virable Bit Rate (VBR) video streaming over IP network, due to channel quality fluctuation. Specifically, a Fuzzy Logic (FL) Control principle is fused with Adaptive Media Playout (AMP) control to estimate an appropriate playout frame rate, namely FLAMP. Based on the estimation of the playout frame rate, the FLAMP algorithm adjusts the consumption rate smoothly to avoid video stream degradation. Simulation results validate that the FLAMP scheme efficiently reduces the buffer outage probability and provides better visual quality where FLAMP gives 26.5% less ferquence of playout interruption, and 21.6% less variance of distortion of playout as compared to APTA.
Volume: 13
Issue: 2
Page: 527-533
Publish at: 2019-02-01

Research, design and fabrication of a microwave active filter for nanosatellite’s receiver front-ends at s-band

10.12928/telkomnika.v17i1.10079
Linh Ta; Ministry of Science and Technology Phuong , Bernard; ENS Paris-Saclay Journet , Duong Bach; VNU University of Engineering and Technology Gia
In satellite technology, the communication between space segment and ground segment plays a vital role in the success of the mission. This paper is targeted at study, design and fabrication of a microwave active filter for the receiver front-ends using coupled line filter structure, which can be applied to the nanosatellite’s communication subsystem. The whole active filter module is a combination of a microstrip bandpass filter and a preceding two-stage wideband low noise amplifier using FET devices. The proposed module operates in the frequency range of 2-2.4 GHz, which can be divided to 10 frequency slots of about 40 MHz for each. These frequency slots will be used for the S-band multi-frequency receiving function of the ground station, as well as the nanosatellite. The simulated and measured results of this active filter configuration are presented.
Volume: 17
Issue: 1
Page: 23-31
Publish at: 2019-02-01

The design of smart notification on android gadget for academic announcement

10.12928/telkomnika.v17i1.10245
Agustina; Universitas Indo Global Mandiri Heryati , Evi; Universitas Indo Global Mandiri Yulianti , Faradillah; Universitas Indo Global Mandiri Faradillah , Dewi; Universitas Indo Global Mandiri Sartika , Dhamayanti; Universitas Indo Global Mandiri Dhamayanti , Imelda; Universitas Indo Global Mandiri Saluza , Ahmad; Universitas Indo Global Mandiri Sanmorino
In this article, we try to design the architecture of a smart notification system using an Android gadget for academic notification in college. Academic notification in colleges now utilizes bulletin boards and online media such as websites or social media. The problem faced is the high cost and resources required to deliver the academic notification. Another problem is whether the information delivered can be right to the students who need it. We proposed the architecture of a smart notification system that can reduce the cost, and the information delivered can be right on target to the students in need.
Volume: 17
Issue: 1
Page: 147-152
Publish at: 2019-02-01

Blended intelligence of FCA with FLC for knowledge representation from clustered data in medical analysis

10.11591/ijece.v9i1.pp635-645
Ch. Neelima , S. S.V.N. Sarma
Formal concept analysis is the process of data analysis mechanism with emergent attractiveness across various fields such as data mining, robotics, medical, big data and so on. FCA is helpful to generate the new learning ontology based techniques. In medical field, some growing kids are facing the problem of representing their knowledge from their gathered prior data which is in the form of unordered and insufficient clustered data which is not supporting them to take the right decision on right time for solving the uncertainty based questionnaires. In the approach of decision theory, many mathematical replicas such as probability-allocation, crisp set, and fuzzy based set theory were designed to deals with knowledge representation based difficulties along with their characteristic. This paper is proposing new ideological blended approach of FCA with FLC and described with major objectives: primarily the FCA analyzes the data based on relationships between the set of objects of prior-attributes and the set of attributes based prior-data, which the data is framed with data-units implicated composition which are formal statements of idea of human thinking with conversion of significant intelligible explanation. Suitable rules are generated to explore the relationship among the attributes and used the formal concept analysis from these suitable rules to explore better knowledge and most important factors affecting the decision making. Secondly how the FLC derive the fuzzification, rule-construction and defuzzification methods implicated for representing the accurate knowledge for uncertainty based questionnaires. Here the FCA is projected to expand the FCA based conception with help of the objective based item set notions considered as the target which is implicated with the expanded cardinalities along with its weights which is associated through the fuzzy based inference decision rules. This approach is more helpful for medical experts for knowing the range of patient’s memory deficiency also for people whose are facing knowledge explorer deficiency.
Volume: 9
Issue: 1
Page: 635-645
Publish at: 2019-02-01

The influence of sampling frequency on tone recognition of musical instruments

10.12928/telkomnika.v17i1.11608
Linggo; Sanata Dharma University Sumarno , Kuntoro; Sanata Dharma University Adi
Sampling frequency of musical instruments tone recognition generally follows the Shannon sampling theorem. This paper explores the influence of sampling frequency that does not follow the Shannon sampling theorem, in the tone recognition system using segment averaging for feature extraction and template matching for classification. The musical instruments we used were bellyra, flute, and pianica, where each of them represented a musical instrument that had one, a few, and many significant local peaks in the Discrete Fourier Transform (DFT) domain. Based on our experiments, until the sampling frequency is as low as 312 Hz, recognition rate performance of bellyra and flute tones were influenced a little since it reduced in the range of 5%. However, recognition rate performance of pianica tones was not influenced by that sampling frequency. Therefore, if that kind of reduced recognition rate could be accepted, the sampling frequency as low as 312 Hz could be used for tone recognition of musical instruments.
Volume: 17
Issue: 1
Page: 253-260
Publish at: 2019-02-01

Speed limiter integrated fatigue analyzer (SLIFA): engineering design and concept

10.12928/telkomnika.v17i1.8249
Hadi; Mercubuana University Pranoto , A.M.; University Tun Hussein Onn Malaysia [UTHM] Leman , Fajar; Mercubuana University Anggara , Muhammad; Mercubuana University Kholil
Main issue in urban transportation system is traffic accident which caused by several factors where there are two factors that has a significant contribution in accident are overspeed and fatigue. Therefore, main objective of this research is to develop Speed Limiter Integrated Analyzer (SLIFA). This device will be controlling the speed by cutting off the fuel supply to the engine when driver's fatigue or speed are beyond limitation. This research was consists of four steps which are Step 1 is study literature on types of vehicle. Step 2, detail engineering design that is focused in this research. Step 3 is describing the target of SLIFA installation. Step 4 is fabricating and testing of SLIFA on truck and bus in range of July 2017 to January 2018. The result shows the appropriate voltage for speed at 70 km/h is 10.7 volt for limiting the speed. The traffic accident has succesfully decreased up to 47% after SLIFA installed on truck and bus. It can be concluded that the SLIFA application on transportation especially on truck and bus was very recommended to reduce traffic accident and play an appropriate government regulation.
Volume: 17
Issue: 1
Page: 508-520
Publish at: 2019-02-01
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