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31,377 Article Results

Hybrid Cryptography security in public cloud using TwoFish and ECC algorithm

10.11591/ijece.v9i4.pp2578-2584
Siva Sankaran P. , Kirubanand V B
Cloud computing is a structure for rendering service to the user for free or paid basis through internet facility where we can access to a bulk of shared resources which results in saving managing cost and time for large companies, The data which are stored in the data center may incur various security, damage and threat issues which may result in data leakage, insecure interface and inside attacks. This paper will demonstrate the implementation of hybrid cryptography security in public cloud by a combination of Elliptical Curve Cryptography and Twofish algorithm, which provides an innovative solution to enhance the security features of the cloud so that we can improve the service thus results in increasing the trust over the technology.    
Volume: 9
Issue: 4
Page: 2578-2584
Publish at: 2019-08-01

Fingerprint indoor positioning based on user orientations and minimum computation time

10.12928/telkomnika.v17i4.12774
Firdaus; Universitas Islam Indonesia Firdaus , Noor Azurati; Universiti Teknologi Malaysia Ahmad , Shamsul; Universiti Teknologi Malaysia Sahibuddin
Indoor Positioning System (IPS) has an important role in the field of Internet of Thing. IPS works based on many existing radio frequency technologies. One of the most popular methods is WLAN Fingerprint because this technology has been installed widely inside buildings and it provides a high level of accuracy. The performance is affected by people who hold mobile devices (user) and also people around the users. This research aimed to minimize the computation time of kNN searching process. The results showed that when the value of k in kNN was greater, the computation time increased, especially when using Cityblock and Minkowski distance function. The smallest average computation time was 2.14 ms, when using Cityblock. Then the computational time for Euclidean and Chebychev were relatively stable, i.e. 2.2 ms and 2.23 ms, respectively.
Volume: 17
Issue: 4
Page: 1740-1749
Publish at: 2019-08-01

45 degree arrangement of compact array antenna for MIMO application

10.11591/ijeecs.v15.i2.pp838-844
M. F. Ismail , H. A. Majid , C. Macwright , M. N. A. H. Shaabani , M. S. Mohd , M. M. Zahar , F. Zubir , M. A. Abdullah
A study on the compact array microstrip patch antenna for multiple-input multiple-output (MIMO) communication system based on the antenna arrangement is performed. The 2.45 GHz rectangular array are arranged in 45 degree slanted inward and outward for each other to reduce the mutual coupling effect between the patches. The antenna properties are analyzed and compact antenna design is determined based on the simulation results. The results show the antennas can very compact while maintaining low mutual coupling. The gain of the MIMO antenna is 11.3 dBi. The simulated and tested return losses, together with the radiation patterns, are presented and discussed.
Volume: 15
Issue: 2
Page: 838-844
Publish at: 2019-08-01

Designing a constellation for AIS mission based on data acquisition of LAPAN-A2 and LAPAN-A3 satellites

10.12928/telkomnika.v17i4.12048
Mohammad; LAPAN Mukhayadi , Abdul; LAPAN Karim , Wahyudi; LAPAN Hasbi , Rizki; LAPAN Permala
Indonesia requires a maritime surveillance system that's capable to monitor its extensive waters territorial. One of the maritime standard navigation systems named AIS (Automatic Identification System), which is based on GPS and VHF digital communication, have enabled the ship monitoring in a real-time. By placing AIS receiver on the satellite, its coverage will be larger compared to the one usually placed on the seashore by maritime authority. Orbiting the AIS receiver prompted appearing the limitation of Time Division Multiple Access (TDMA) technology so the probability of ship detection would decrease drastically due to a huge number of heard ship signal simultaneously. This paper describes the design of satellite constellation for Indonesian maritime surveillance based on the result of the AIS data acquisition by LAPAN-A2 and LAPAN-A3 satellites that operate in both equatorial and polar orbit.
Volume: 17
Issue: 4
Page: 1774-1784
Publish at: 2019-08-01

3D modified wavelet block tree coding for hyperspectral images

10.11591/ijeecs.v15.i2.pp1001-1008
Shrish Bajpai , Harsh Vikram Singh , Naimur Rahman Kidwai
A novel wavelet-based efficient hyperspectral image compression scheme for low memory sensors has been proposed. The proposed scheme uses the 3D dyadic wavelet transform to exploit intersubband and intrasubband correlation among the wavelet coefficients. By doing the reconstruction of the transform image cube, taking the difference between the frames, it increases the coding efficiency, reduces the memory requirement and complexity of the hyperspectral compression schemes in comparison with other state-of-the-art compression schemes.
Volume: 15
Issue: 2
Page: 1001-1008
Publish at: 2019-08-01

Asynchronous agent-based simulation and optimization of parallel business

10.12928/telkomnika.v17i4.10846
Aziz; Institut Teknologi Sepuluh Nopember Surabaya Fajar , Riyanarto; Institut Teknologi Sepuluh Nopember Sarno
A Port Container Terminal (PCT) involves complex business processes which are carried out by at least four organizations, namely PCT Operator, Customer, Quarantine and Customs. Each organization produces event log data from the activities. The event log data from the four organizations contain synchronous and asynchronous activities. In this research, the four organizations are represented by four agents. By simulating this log data using agent based simulation, we get the performance of the current business process. The performance indicators gathered are time and cost which are needed to do the activity (task). After the simulation is complete, we found Asynchronous Waiting Time (AWT). AWT is waiting time which happens because the agent in the simulation cannot do the newly assigned task because the agent is still working on the other task. Therefore, we parallelize the task performed by the agent so that the agent can do multiple tasks at a time. After we parallelize the task, we perform an optimization process using Stochastic Multicriteria Adaptability Analysis 2 (SMAA-2). Thus, the optimal amount of task an agent can do simultaneously is analyzed. This study result shows that parallelization can reduce AWT of the current system and the optimization process using SMAA-2 shows the most optimal number of multiple tasks an agent can do simultaneously.
Volume: 17
Issue: 4
Page: 1731-1739
Publish at: 2019-08-01

Performance evaluation of listwise deletion for impaired datasets in multiple regression-based prediction

10.11591/ijeecs.v15.i2.pp1009-1018
Chanintorn Jittawiriyanukoon
Multiple Regression-Based Prediction (MRBP) is an emerging calculation to or analysis technique cope with the future by compiling the history of data. The MRBP characteristic will include an approximation for the associations between physical observations and predictions. MRBP is a predictive model, which will be an important source of knowledge in terms of an interesting trend to be followed in the future. However, there is impairment in the MRBP dataset, wherein each form of missing and noisy data has caused an error and is unavailable further analysis. To overcome this unavailability, so that the data analytics can be moved on, two treatment approaches are introduced. First, the given dataset is denoised; next, listwise deletion (LD) is proposed to handle the missing data. The performance of the proposed technique will be investigated by dealing with datasets that cannot be executed. Employing the Massive Online Analysis (MOA) software, the proposed model is investigated, and the results are summarized. Performance metrics, such as mean squared error (MSE), correlation coefficient (COEF), mean absolute error (MAE), root mean squared error (RMSE), and the average error percentage, are used to validate the proposed mechanism. The proposed LD projection is confirmed through actual values. The proposed LD outperforms other treatments as it only requires less state space, which reflects low computation cost, and proves its capability to overcome the limitation of analysis.
Volume: 15
Issue: 2
Page: 1009-1018
Publish at: 2019-08-01

Breakdown characteristics of polyethylene/silicon nitride nanocomposites

10.12928/telkomnika.v17i4.12754
A.; Universiti Teknologi Malaysia Azmi , K. A. A.; Universiti Teknologi Malaysia Seman , K. Y.; Universiti Teknologi Malaysia Lau
Silicon nitride (Si3N4) has been utilized as a nanofiller in polymeric insulation due to its good characteristics in both electrical insulation and thermal conduction properties. In this work, a comparative study was performed between unfilled polyethylene and polyethylene containing different amounts of Si3N4 nanofiller. The study showed that the low density polyethylene (LDPE) added with 15 wt% of Si3N4nanofiller could have higher breakdown strength compared to equivalent LDPE with 10 wt% of Si3N4nanofiller. Morphological characterizations of the nanocomposite samples were performed using field emission electron microscopy (FESEM) and the results showed that the breakdown performance of the investigated materials were affected by the agglomeration of Si3N4 nanoparticles.
Volume: 17
Issue: 4
Page: 1853-1858
Publish at: 2019-08-01

Traffic management with elephant flow detection in software defined networks (SDN)

10.11591/ijece.v9i4.pp3203-3211
Hnin Thiri Zaw , AungHtein Maw
Multipath routing is to distribute the incoming traffic load among available paths between source and destination hosts. Instead of using the single best path, multipath scheme can avoid the congested path. Equal Cost Multi-Path (ECMP) performs the static traffic splitting based on some tuples of the packet headers. The limitation of ECMP does not consider the network parameters such as bandwidth and delay. Unlike the traditional networks, Software-Defined Network (SDN) has many advantages to support dynamic multipath forwarding due to its special characteristics, such as separation of control and data planes, global centralized control, and programmability of network behavior. In this paper, we propose a new architecture design for dynamic multipath-based traffic management approach in the SDN, which comprises of five components: detecting long (elephant) flow, computing shortest paths, estimating end-to-end delay and bandwidth utilization, calculating least cost path and rerouting traffic flow from the ongoing path to the best path. The simulation environment is created through the usage of Mininet emulator and ONOS controller. The evaluation outcomes show that the proposed traffic management method outperforms the ECMP and reactive forwarding method for both TCP and UDP traffic.
Volume: 9
Issue: 4
Page: 3203-3211
Publish at: 2019-08-01

Factors that affects the dielectric properties of natural fibre reinforced hybrid biocomposite

10.11591/ijeecs.v15.i2.pp714-722
Nishanthi Sunthrasakaran , Nor Akmal Mohd Jamail , Rahisham Abd. Rahman , Md Nor Ramdon Bin Baharom , Qamarul Ezani Kamarudin , Mohamad Farid Sies , W. Muhammad W. N. Azrina
Almost all research on natural fibre reinforced composite has focused on the mechanical properties of the composite. Drawing on the important factors that effect the end product of composite, this paper reviews electrical properties of hybrid biocomposite when fibre content and surface treatment is varied. The compilation of dielectric constant, dissipation factor, loss factor and moisture absorption reported by researchers has been presented in this paper. The intrinsic characteristic of natural fibre which is hydrophilic is the main drawback that affects the electrical properties of the composite. Alkaline treatment on natural fibre has proven to overcome the hydrophilic characteristic and improves the adhesion between matrix and fibre. Besides that, the percentage of fibre content plays an important role in producing a good natural fibre reinforced hybrid composite. The moisture uptake, dielectric constant, dissipation factor and loss factor of the composite decreases with decreased fibre content.
Volume: 15
Issue: 2
Page: 714-722
Publish at: 2019-08-01

Zinc oxide nanoparticles based passive saturable absorber for pulse generation in fiber laser

10.12928/telkomnika.v17i4.12778
Nurul Alina Afifi; Universiti Teknologi Malaysia Norizan , Fauzan; Universiti Teknologi Malaysia Ahmad , Muhammad Quisar; Universiti Teknologi Malaysia Lokman , Sulaiman Wadi; University of Malaya Harun
A stable passive Q-switched pulsed generation in Erbium doped fiber laser by Zinc Oxide nanoparticles embedded in polyvinyl alcohol (ZnONP-PVA)-based saturable absorber is demonstrated in this paper. The surface morphology and thickness profile of the fabricated film were observed using FESEM and 3D measuring laser microscope with the measured thickness of 12 μm. Meanwhile the its optical properties is characterized using Raman spectroscopy. The developed ZnONP-PVA film, has modulation depth of 7.8% and intensity saturation of 88.97 MW/cm2. The threshold input pump power to generate Q-switched pulse is at 45.4 mW and can be tuned until 92.4 mW before the pulse diminished. The operating wavelength of generated pulse is at 1535 nm with 3 dB bandwidth approximately of 2 nm with exclusion of parasitic continuous wave lasing. As the input pump power was tuned from threshold to maximum value, the recorded pulse train of repetition rate is tunable from 73.53 kHz to 103.10 kHz while the pulse width decreases from 6.8 μs to 4.8 μs. The calculated maximum output power and pulse energy at maximum input pump power was 5.14 mW and 49.85 nJ, respectively. The measured signal to noise ratio was 56 dB indicated that the generated pulse by ZnO NP based passive saturable absorber was stable.
Volume: 17
Issue: 4
Page: 1635-1641
Publish at: 2019-08-01

The dynamics of traffic congestion: a specific look into malaysian scenario and the plausible solutions to eradicate it using machine learning

10.11591/ijeecs.v15.i2.pp1086-1094
M. Ali , T. K. Sheng , K. M. Yusof , M. R. Suhaili , N. E. Ghazali , S. Ali
Transportation has been considered as the backbone of the economy for the past many years. Unfortunately, since few years due to the uncontrolled urbanization and inadequate planning, countries are facing problem of congestion. The congestion is hindering the economic growth and also causing environmental issues. This has caused serious concerns among the major economies of the world, especially in Asia-Pacific region. Many countries are playing an active role in eradicating this problem and some have been quite successful so far. Malaysia, being a major ASEAN economy is also tackling with this huge problem. The authorities are committed to solve the issue. In this regard, solving the issue leveraging the use of big data analytics has become crucial. The authorities can form a complete robust framework based on big data analytics and decision making process to solve the issue effectively. The work focuses and observes the traffic data samples and analyzes the accuracy of machine learning algorithms, which helps in decision making. Yet, here is a lot to be done if the government needs to solve the problem effectively. Supposedly, a comprehensive big data transport framework leveraging machine learning, is one way to solve the issue.
Volume: 15
Issue: 2
Page: 1086-1094
Publish at: 2019-08-01

A blind channel shortening for multiuser, multicarrier CDMA system over multipath fading channel

10.12928/telkomnika.v17i4.11400
F.; University of Saida Bouasria , A.; University of Sidi Bel Abbes Djebbari , M.; University of Saïda Chetioui
In this paper we derive the Multicarrier Equalization by Restoration of Redundancy (MERRY) algorithm: A blind, adaptive channel shortening algorithm for updating a Time-domain Equalizer (TEQ) in a system employing MultiCarrier Code Division Multiple Access (MC-CDMA) modulation. We show that the MERRY algorithm applied to the MC-CDMA system converges considerably more rapidly than in the Orthogonal Frequency Division Multiplexing (OFDM) system [1]. Simulations results are provided to demonstrate the performance of the algorithm.
Volume: 17
Issue: 4
Page: 1692-1697
Publish at: 2019-08-01

Discrete liquid level fiber sensor

10.12928/telkomnika.v17i4.12769
Muhammad Yusof Mohd; Universiti Teknologi Malaysia Noor , Ahmad Sharmi; Universiti Teknologi Malaysia Abdullah , Asrul Izam; Universiti Teknologi Malaysia Azmi , Mohd Haniff; Universiti Teknologi Malaysia Ibrahim , Mohd Rashidi; Universiti Teknologi Malaysia Salim , Norazan; Universiti Teknologi Malaysia Kassim
A novel simple fiber sensor to sense liquid level is presented. The operation principle is based on the relative Fresnel reflective intensity. The sensor consists of a fiber splitter with the configuration of one input to multiple fiber outputs, i.e. 1×4, 1×8 and 1×12 arrangements that act as a discrete liquid level. A broadband source (BBS) is used as the light source supply. The total reflected power intensity is measured using a power meter. Experimental results show that the power intensity decreases as the level of liquid is increased. The sensor has a simple configuration, low cost, and it can be customized for a wide height measurement range spanning from a few centimeters up to a hundred meters.
Volume: 17
Issue: 4
Page: 1966-1972
Publish at: 2019-08-01

HR analytics a roadmap for decision making: case study

10.11591/ijeecs.v15.i2.pp979-990
Brahim Jabir , Noureddine Falih , Khalid Rahmani
In the socio-economic world, the human resources are in the most top phase of the enterprise evolution. This evolution began when the arithmetic, statistics are applicable over a vast of opportunities and used to identify problems and support decision. However, analytics has been emerged to provide predictions and understand the people performance based on available data.In light of this vast amount of information, human resources services need to deploy a predictive management model and operating system of analytics that can be an efficient and an instead solution that can respond to the gaps of the traditional existing ones and facilitate the decision making. In this paper, we present a literature review of this HR analytics concept and a case study concerning the impact of interventions using an analytics solution. 
Volume: 15
Issue: 2
Page: 979-990
Publish at: 2019-08-01
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