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31,456 Article Results

Countermeasures against darknet localisation attacks with packet sampling

10.11591/ijeecs.v19.i2.pp1036-1047
Masaki Narita , Keisuke Kamada , Kanayo Ogura , Bhed Bahadur Bista , Toyoo Takata
The darknet monitoring system consists of network sensors widely deployed on the Internet to capture incoming unsolicited packets. A goal of this system is to analyse captured malicious packets and provide effective information to protect regular nonmalicious Internet users from malicious activities. To provide effective and reliable information, the location of sensors must be concealed. However, attackers launch localisation attacks to detect sensors in order to evade them. If the actual location of sensors is revealed, it is almost impossible to identify the latest tactics used by attackers. Thus, in a previous study, we proposed a packet sampling method, which samples incoming packets based on an attribute of the packet sender, to increase tolerance to a localisation attack and maintain the quality of information publicised by the system. We were successful in countering localisation attacks, which generate spikes on the publicised graph to detect a sensor. However, in some cases, with the previously proposed sampling method, spikes were clearly evident on the graph. Therefore, in this paper, we propose advanced sampling methods such that incoming packets are sampled based on multiple attributes of the packet sender. We present our improved methods and show promising evaluation results obtained via a simulation.
Volume: 19
Issue: 2
Page: 1036-1047
Publish at: 2020-08-01

Object detection for KRSBI robot soccer using PeleeNet on omnidirectional camera

10.12928/telkomnika.v18i4.15009
Winarno; Universitas Airlangga Winarno , Ali Suryaperdana; Universitas Airlangga Agoes , Eva Inaiyah; Universitas Airlangga Agustin , Deny; Universitas Airlangga Arifianto
Kontes Robot Sepak Bola Indonesia (KRSBI) is an annual event for contestants to compete their design and robot engineering in the field of robot soccer. Each contestant tries to win the match by scoring a goal toward the opponent's goal. In order to score a goal, the robot needs to find the ball, locate the goal, then kick the ball toward goal. We employed an omnidirectional vision camera as a visual sensor for a robot to perceive the object’s information. We calibrated streaming images from the camera to remove the mirror distortion. Furthermore, we deployed PeleeNet as our deep learning model for object detection. We fine-tuned PeleeNet on our dataset generated from our image collection. Our experiment result showed PeleeNet had the potential for deep learning mobile platform in KRSBI as the object detection architecture. It had a perfect combination of memory efficiency, speed and accuracy.
Volume: 18
Issue: 4
Page: 1942-1953
Publish at: 2020-08-01

Physical layer security in hybrid TPSR two-way half-duplex relaying networks over rayleigh fading channel: non-zero secrecy probability analysis

10.11591/ijeecs.v19.i2.pp1095-1104
Phu Tran Tin , Duy Hung Ha , Minh Tran
In this paper, we proposed and investigated the Hybrid TPSR two-way half-duplex (HD) relaying communication networks over rayleigh fading channel in the presence of the eavesdropper (E). The system model consists of two sources A and B communicate with each other with helping of intermediate Relay (R). For the system performance analysis, we analyzed and derived the exact and approximate integral-form of the system Non-zero secrecy probability (NZSP) in the case that the E uses the MRC (maximal ratio combining) technique. In addition, the effect of the main system parameters on the system performance is investigated. Finally, all the research results are convinced by the Monte Carlo Simulation. This paper can provide a novel recommendation for relaying communication network manufacture.
Volume: 19
Issue: 2
Page: 1095-1104
Publish at: 2020-08-01

SWANSTAT: a user-friendly web application for data analysis using shinydashboard package in R

10.12928/telkomnika.v18i4.14182
Rizal; STIEM Bongaya Bakri , Bagus; IPB University Sartono , Hazan Azhari; Swanstatistics Indonesia Zainuddin , Laode Ahmad; Swanstatistics Indonesia Sabil
SWANSTAT is a user-friendly web application and free license that developed from the R programming language using shinydashboard Package. This research aims to create SWANSTAT was to streamline the routine workflow of data analysis so that users who are unfamiliar with R can perform the analysis interactively in a web browser with a cloud computing using a shiny server. The software development method used in this study is the SDLC with the waterfall model. The result of this research is the SWANSTAT software was developed using R by combining various packages and can be accessed online through various types of browsers on http://apps.swanstatistics.com. Besides, SWANSTAT consist of various features including the best visualization, the basis of statistical methods, help documents and tutorials. This research will continuously develop this application by enriching the latest statistical method, as well as improving the quality of features for data science needs.
Volume: 18
Issue: 4
Page: 1866-1873
Publish at: 2020-08-01

The design of a smart home controller based on ADALINE

10.12928/telkomnika.v18i4.14893
Puji Catur; Sekolah Tinggi Teknik PLN Siswipraptini , Rosida Nur; Sekolah Tinggi Teknik PLN Aziza , Iriansyah; Sekolah Tinggi Teknik PLN Sangadji , Indrianto; Sekolah Tinggi Teknik PLN Indrianto
This paper proposes a prototype of an improved smart home controller that implements a neural network-based algorithm for enabling the controller to make decisions and act based on the current condition. Unlike previous approaches, this design also utilizes the use of IoT (internet of thing) technology and neural network based-algorithm for developing the controller. Since a smart home is equipped with various sensors, actuators, smart appliances, and mobile terminals, all of these devices need to be connected to the Internet to be able to communicate and provide services for its occupants. The construction of the proposed controller is carried out through several procedures, i.e. the implementation of the ADALINE (adaptive linear) as the neural network method, the design of the smart home controller prototype, and the validation process using mean average percentage error (MAPE) calculation. This prototype integrates functionalities of several household appliances into one application controlled by a smartphone. ADALINE is applied as an algorithm to predict output when the controller is in automatic mode. Although the obtained accuracy value is still not satisfactory, the value is bound to change when testing on more data. The work published in this paper may encourage the implementation of smart technology in more households in Indonesia. 
Volume: 18
Issue: 4
Page: 2177-2185
Publish at: 2020-08-01

Semi-supervised auto-encoder for facial attributes recognition

10.12928/telkomnika.v18i4.14836
Soumaya; University of Gabès Zaghbani , Nouredine; University of Gabès Boujneh , Med Salim; University of Sfax Bouhlel
The particularity of our faces encourages many researchers to exploit their features in different domains such as user identification, behaviour analysis, computer technology, security, and psychology. In this paper, we present a method for facial attributes analysis. The work addressed to analyse facial images and extract features in the purpose to recognize demographic attributes: age, gender, and ethnicity (AGE). In this work, we exploited the robustness of deep learning (DL) using an updating version of autoencoders called the deep sparse autoencoder (DSAE). In this work we used a new architecture of DSAE by adding the supervision to the classic model and we control the overfitting problem by regularizing the model. The pass from DSAE to the semi-supervised autoencoder (DSSAE) facilitates the supervision process and achieves an excellent performance to extract features. In this work we focused to estimate AGE jointly. The experiment results show that DSSAE is created to recognize facial features with high precision. The whole system achieves good performance and important rates in AGE using the MORPH II database
Volume: 18
Issue: 4
Page: 2169-2176
Publish at: 2020-08-01

Comparison between handwritten word and speech record in real-time using CNN architectures

10.11591/ijece.v10i4.pp4313-4321
Javier Orlando Pinzón-Arenas , Robinson Jiménez-Moreno
This paper presents the development of a system of comparison between words spoken and written by means of deep learning techniques. There are used 10 words acquired by means of an audio function and, these same words, are written by hand and acquired by a webcam, in such a way as to verify if the two data match and show whether or not it is the required word. For this, 2 different CNN architectures were used for each function, where for voice recognition, a suitable CNN was used to identify complete words by means of their features obtained with mel frequency cepstral coefficients, while for handwriting, a faster R-CNN was used, so that it both locates and identifies the captured word. To implement the system, an easy-to-use graphical interface was developed, which unites the two neural networks for its operation. With this, tests were performed in real-time, obtaining a general accuracy of 95.24%, allowing showing the good performance of the implemented system, adding the response speed factor, being less than 200 ms in making the comparison.
Volume: 10
Issue: 4
Page: 4313-4321
Publish at: 2020-08-01

UFMC system performance improvement using RS codes for 5G communication system

10.12928/telkomnika.v18i4.15703
Ghasan Ali; University of Kufa Hussain , Lukman; Universiti Tun Hussein Onn Malaysia Audah
Fifth generation (5G) mobile communication is expected to be deployed in several countries by 2020. Where, the data consumptions are expected to be increased to 30% thus, it cannot be supported by the present technologies 3G and 4G. In contrast, looking for new alternative modulation techniques of orthogonal frequency division modulation (OFDM) system which is suffering from high Peak to Average Power Ratio (PAPR) and out of band (OOB) side lobes are needed to use in 5G communication system. Hence, Universal Filtered Multi-Carrier (UFMC) is considered as alternative waveform to overcome of OFDM disadvantages. In communication systems, channel coding is considered vital part, where error correction codes (ECC) are used to detect and correct the errors which is occurring in channel noise. In this paper, RS codes are suggested with UFMC system to achieve the reliability of information transmission over noisy channels. The results showed that although, the values of PAPR levels for using RS codes in UFMC increased to 8.8653dB against 6.9735 dB for OFDM system. However, there are significant improvements in BER performance owing to use RS codes against uncoded-UFMC system. Furthermore, the values of OOB in UFMC system was lower than OFDM system.
Volume: 18
Issue: 4
Page: 1843-1848
Publish at: 2020-08-01

Depth image correction for intel realsense depth camera

10.11591/ijeecs.v19.i2.pp1021-1027
Hyun Jun Park , Kwang Baek Kim
Intel RealSense depth camera provides depth image using infrared projector and infrared camera. Using infrared radiation makes it possible to measure the depth with high accuracy, but the shadow of infrared radiation makes depth unmeasured regions. Intel RealSense SDK provides a postprocessing algorithm to correct it. However, this algorithm is not enough to be used and needs to be improved. Therefore, we propose a method to correct the depth image using image processing techniques. The proposed method corrects the depth using the adjacent depth information. Experimental results showed that the proposed method corrects the depth image more accurately than the Intel RealSense SDK.
Volume: 19
Issue: 2
Page: 1021-1027
Publish at: 2020-08-01

Hybrid fuzzy-PID like optimal control to reduce energy consumption

10.12928/telkomnika.v18i4.14535
Hari; Sebelas Maret University Maghfiroh , Chico; Sebelas Maret University Hermanu , Muhammad Hamka; Sebelas Maret University Ibrahim , Miftahul; Sebelas Maret University Anwar , Agus; Sebelas Maret University Ramelan
The electric motor is one of the appliances that consume considerable energy. Therefore, the control method which can reduce energy consumption with better performance is needed. The purpose of this research is to minimize the energy consumption of the DC motor with maintaining the performance using Hybrid Fuzzy-PID. The input of the Fuzzy system is the error and power of the system. Where error is correlated with matric Q and power is correlated with matric R. Therefore, adjusting the fuzzy rule on error and power is like adjust matrices Q and R in LQR method. The proposed algorithm can reduce energy consumption. However, system response is slightly decrease shown from ISE (Integral Square Error). The energy reduction average is up to 5.58% while the average of ISE increment is up to 1.89%. The more speed variation in the system, the more energy can be saved by the proposed algorithm. While in terms of settling time, the proposed algorithm has the longest time due to higher computation time in the fuzzy system. This performance can be increased by tuning fuzzy rules. This algorithm offers a solution for a complex system which difficult to be modeled.
Volume: 18
Issue: 4
Page: 2053-2061
Publish at: 2020-08-01

Internet-offline solution: detail description and benchmarking

10.12928/telkomnika.v18i4.13309
Onno W.; IBI Darmajaya Purbo
In this paper, for the first time, the detail of the Internet-Offline solution for rural/village schools is described, and its benchmarking is reported. For providing offline knowledge access, four (4) different systems have examined. An affordable, the RaspberryPi3 server found to be able to provide web as well as file sharing service for up to 20 clients at 100Mbps throughput. UnixBench shows that the RaspberryPi3 about 25% performance of a four-core i5 system. Using consumer grade power banks at 10000-20000mAh, the RaspberryPi3 server may provide a 6+ hour operation. With reliable electrical power, a mini PC provides a more reliable alternative at an order of magnitude increase in cost. For more than 100 users, one may use i5 or higher engines to keep the price-performance ratio low. Besides, in the Internet-Offline system, teachers no longer have to worry about bullies, hoax, or pornographic contents.
Volume: 18
Issue: 4
Page: 1809-1818
Publish at: 2020-08-01

Study on transmission over Nakagami-m fading channel for multiple access scheme without orthogonal signal

10.12928/telkomnika.v18i4.14227
Chi-Bao; Industrial University of Ho Chi Minh City Le , Dinh-Thuan; Industrial University of Ho Chi Minh City (IUH) Do
In this paper, a downlink performance in non-orthogonal multiple access (NOMA) system is considered. With regard to different priority for two NOMA users, we exploit the closed-form expressions of outage probability over wireless fading channel following Nakagami-m fading. The fixed power allocation factor scheme is examined to reduce the complexity in computation regarding performance analysis. In our analysis, perfect successive interference cancellation (SIC) is applied in order to achieve perfect signal decoding operation. Simulation results show that the considered NOMA downlink scheme is affected by transmit SNR, power allocation factors, fading parameters.
Volume: 18
Issue: 4
Page: 2205-2212
Publish at: 2020-08-01

Speaker specific feature based clustering and its applications in language independent forensic speaker recognition

10.11591/ijece.v10i4.pp3508-3518
Satyanand Singh , Pragya Singh
Forensic speaker recognition (FSR) is the process of determining whether the source of a questioned voice recording (trace) is a specific individual (suspected speaker). The role of the forensic expert is to testify by using, if possible, a quantitative measure of this value to the value of the voice evidence. Using this information as an aid in their judgments and decisions are up to the judge and/or the jury. Most existing methods measure inter-utterance similarities directly based on spectrum-based characteristics, the resulting clusters may not be well related to speaker’s, but rather to different acoustic classes. This research addresses this deficiency by projecting language-independent utterances into a reference space equipped to cover the standard voice features underlying the entire utterance set. The resulting projection vectors naturally represent the language-independent voice-like relationships among all the utterances and are therefore more robust against non-speaker interference. Then a clustering approach is proposed based on the peak approximation in order to maximize the similarities between language-independent utterances within all clusters. This method uses a K-medoid, Fuzzy C-means, Gustafson and Kessel and Gath-Geva algorithm to evaluate the cluster to which each utterance should be allocated, overcoming the disadvantage of traditional hierarchical clustering that the ultimate outcome can only hit the optimum recognition efficiency. The recognition efficiency of K-medoid, Fuzzy C-means, Gustafson and Kessel and Gath-Geva clustering algorithms are 95.2%, 97.3%, 98.5% and 99.7% and EER are 3.62%, 2.91 %, 2.82%, and 2.61% respectively. The EER improvement of the Gath-Geva technique based FSRsystem compared with Gustafson and Kessel and Fuzzy C-means is 8.04% and 11.49% respectively
Volume: 10
Issue: 4
Page: 3508-3518
Publish at: 2020-08-01

A compact multi-band notched characteristics UWB microstrip patch antenna with a single sheet of graphene

10.12928/telkomnika.v18i4.14942
Noor; Al-Ahliyya Amman University Raheem , Nidal; Al-Ahliyya Amman University Qasem
A rectangular tuneable Ultra-wideband (UWB) Microstrip Patch (MP) antenna based on a Single Sheet of Graphene (SSG) is designed in this study. The antenna band can be tuned by applying a DC voltage bias perpendicular to the SSG at various values via adjusting the input impedance. The antenna has been analyzed by Computer Simulation Technology (CST) Microwave Studio (MWS) software using an FR4 substrate of thickness 1.6 mm with a dielectric permittivity =4.4 and loss tangent tan =0.02 fed by a 50 Ω microstrip line frequency. The design is compact since the antenna consists mostly of copper and the SSG. Graphene’s low weight, high flexibility, and strength make it more attractive than other semiconductor materials. Then, the study investigates the effects of applying the electrical characteristics of graphene to the antenna’s length, which varies with the ON and OFF states. This UWB MP antenna is also designed with notch characteristics so that it can reject undesired interference signals. Subsequently, this compact UWB MP antenna with tuneable resonance frequency is suitable for most wireless communication applications. The simulation results work in the 3.1 to 10 GHz range, as required for UWB technology.
Volume: 18
Issue: 4
Page: 1708-1718
Publish at: 2020-08-01

Role of gamification in classroom teaching: Pre-service teachers’ view

10.11591/ijere.v9i3.20622
Rita Wong Mee Mee , Tengku Shahrom Tengku Shahdan , Md Rosli Ismail , Khatipah Abd Ghani , Lim Seong Pek , Wong Yee Von , Adelaide Woo , Yugeshineey Subba Rao
Planning a creative learning environment is not an easy task. Teachers prefer to teach traditionally in chalk-and-talk approach during language teaching. However, this does not fit learners of the 21st Century as they prefer game-like activities instead of pen-and-paper lessons. Hence, the introduction of gamification in classroom would result in immediate enthusiasm and curiosity, which leads to the learners’ willingness to learn. Gamification prepares learners to be active and take responsibility upon their own learning. Lessons filled with fun games are believed to be more effective in producing a positive outcome as learners are motivated to play more although they do not realise the fact that they are learning subconsciously. This study aimed to explore views of 33 pre-service teachers in using gamification in language teaching during their 16-week internship at local primary schools around Selangor, Malaysia. A quantitative survey research method was used by administering a set of questionnaires at the end of their internship. The data collected was then analysed and presented in the form of tables. The results showed that integrating gamification into language learning improved learners’ creative, critical and problem-solving skills. Thus, interesting and engaging activities spark learners’ interest in language learning subconsciously.
Volume: 9
Issue: 3
Page: 684-690
Publish at: 2020-08-01
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