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29,602 Article Results

Hierarchy Process Mining from Multi-Source Logs

10.12928/telkomnika.v15i4.6326
Riyanarto; Institut Teknologi Sepuluh Nopember, Indonesia Sarno , Yutika Amelia; Institut Teknologi Sepuluh Nopember, Indonesia Effendi
Nowadays, large-scale business processes is growing rapidly; in this regards process mining is required to discover and enhance business processes in different departments of an organization. A process mining algorithm can generally discover the process model of an organization without considering the detailed process models of the departments, and the relationship among departments. The exchange of messages among departments can produce asynchronous activities among department process models. The event logs from departments can be considered as multi-source logs, which cause difficulties in mining the process model. Discovering process models from multi-source logs is still in the state of the art, therefore this paper proposes a hierarchy high-to-low process mining approach to discover the process model from a complex multi-source and heterogeneous event logs collected from distributed departments. The proposed method involves three steps; i.e. firstly a high level process model is developed; secondly a separate low level process model is discovered from multi-source logs; finally the Petri net refinement operation is used to integrate the discovered process models. The refinement operation replaced the abctract transitions of a high level process model with the corresponding low level process models. Multi-source event logs from several departments of a yarn manufacturing were used in the computational study, and the results showed that the proposed method combined with the modified time-based heuristics miner could discover a correct parallel process business model containing XOR, AND, and OR relations.
Volume: 15
Issue: 4
Page: 1955-1970
Publish at: 2017-12-01

IMC Based Fractional Order Controller for Three Interacting Tank Process

10.12928/telkomnika.v15i4.5784
Abdul Wahid; NIT Jamshedpur, India Nasir , Idamakanti; NIT Jamshedpur, India Kasireddy , Arun Kumar; NIT Jamshedpur, India Singh
In model based control, performance of the controlled plant considerably depends on the accuracy of real plant being modelled. In present work, an attempt has been made to design Internal Model Control (IMC), for three interacting tank process for liquid level control. To avoid complexities in controller design, the third order three interacting tank process is modelled to First Order Plus Dead Time (FOPDT) model. Exploiting the admirable features of Fractional Calculus, the higher order model is also modelled to Fractional Order First Order Plus Dead Time (FO-FOPDT) model, which further reduces the modelling error. Moving to control section, different IMC schemes have been proposed, where the fractional order filter is introduced along with the conventional integer order filter. Various simulations have been performed to show the greatness of Fractional order modelled system & fractional order filters over conventional integer order modelled system & integer order filters respectively. Both for parameters estimation of reduced order model and filter tuning, Genetic Algorithm (GA) is being applied.  
Volume: 15
Issue: 4
Page: 1723-1732
Publish at: 2017-12-01

Determining the Optimum Number of Paths for Realization of Multi-path Routing in MPLS-TE Networks

10.12928/telkomnika.v15i4.6597
Mohammad; Philadelphia University, Jordan Alhihi , Mohammad Reza; Shiraz University of Technology, Iran Khosravi , Hani; Philadelphia University, Jordan Attar , Mohammad; Philadelphia University, Jordan Samour
Multi-Protocol Label Switching for Traffic Engineering (MPLS-TE) technology is an intelligent and advanced tool for handling traffic through the core networks and implementing new services based on virtual transport. Since MPLS-TE combines channel and network layer mechanisms, network administrators can optimally integrate and allocate the traffic loads while maintaining the speed of technologies such as Asynchronous Transfer Mode (ATM) technology. In this paper, the problem of the developed algorithm of multi-path routing which allows us to determine the optimum number of independent shortest paths is theoretically solved. In details, the article proposes a way for finding the set of shortest paths using Dijkstra's algorithm, and then determination of the maximum flow for each of the shortest paths based on the mathematical concepts and finally, introducing the solution of the multi-criteria optimization problem for a set of shortest paths. According to our approach, optimizing the use of resources in the core networks is possible with using the MPLS-TE technology.
Volume: 15
Issue: 4
Page: 1701-1709
Publish at: 2017-12-01

Immensely Discriminate Routing in Wireless Networks

10.11591/ijeecs.v8.i3.pp712-714
Sujatha V , E. A. Mary Anitha
Wireless networks are predictable to grant essential Internet access multimedia traffic service also increasingly such networks have been emerged in real life. However, the application scenarios is indeterminate as well as largely scalable routing is very difficult. Thus require efficient routing schemes in wireless network. In this paper, we propose Immensely Discriminate Routing protocol is used for multihop routing in wireless network. Here, node distance, node link, node trust and node quality of service is evaluated the next hop. This parameters are determined an efficient path in the wireless network.
Volume: 8
Issue: 3
Page: 712-714
Publish at: 2017-12-01

NFC Based Digital Innovation Technique to Eliminate Coin Shortage Problem

10.11591/ijeecs.v8.i3.pp651-653
Paramasivam E , D. Arivazhaga
India has an issue with little change in Restaurants, Auto-Taxi drivers, Retail Shops, Public Busses, and Markets wherever individuals experience the ill effects of coin lack issue. Yet at the same time, the regular man confronts lack of progress and frequently being paid in éclairs, mints and biting gums. This venture proposes an inventive arrangement called Byte-COIN; to take care of the coin lack issue that we are confront in our nation. The arrangement included a secured advanced payment framework that has reason assembled margins on the sum required in the exchange. Every exchange includes the support of the vendor and customer. In spite of the fact that there is no instant contact with the bank at the time of year of exchange, a base support of banks is important to effectively execute this. There is no need of a web association, in this way making it available to all aspects of the nation.
Volume: 8
Issue: 3
Page: 651-653
Publish at: 2017-12-01

WareWise: Business Development Management Framework based on Device-to-Device Industrial Internet of Things

10.11591/ijeecs.v8.i3.pp747-750
Ramesh P. , V. Mathivanan
Internet of Things (IoT) - empowered data framework arrangements are developing in different spaces, for example, remote social insurance, keen coordination’s, farming et cetera. In the mean time, Business Development Management Frameworks (BDMF) has turned out to be promising instruments for driving and overseeing gadgets inside IoT frameworks. Be that as it may, past works have not completely tended to how the IoT-based BDMF can proceed with their execution when the included IoT gadgets don't have a dependable Internet association. In this paper, we propose a framework outline for decentralized device to device (D2D) - based BD execution, where versatile hubs have the ability of both executing BDs additionally moving BD execution to different hubs amid runtime. We apply this plan to the field of shrewd coordination’s, keeping in mind the end goal to empower savvy products checking. The exhibited merchandise observing arrangement empowers responding to occasions when they happen, while likewise producing a hint of the checking execution history. A model concentrating on the movement usefulness of the stage has been actualized and tried to assess its execution with regards to the specified savvy coordination’s situation.
Volume: 8
Issue: 3
Page: 747-750
Publish at: 2017-12-01

A Portable Insole Pressure Mapping System

10.12928/telkomnika.v15i4.7227
Kian; Universiti Tun Hussein Onn Malaysia Sek Tee , Yogindra; Universiti Tun Hussein Onn Malaysia Syam Hari Javahar , Hashim; Universiti Tun Hussein Onn Malaysia Saim , Wan; Universiti Tun Hussein Onn Malaysia Nurshazwani Wan Zakaria , Safinaz; University Kebangsaan Malaysia Binti Mohd Khialdin , Hazlita; University Kebangsaan Malaysia Isa , M.; Ain Shams University I. Awad , Chin; Universiti Tun Hussein Onn Malaysia Fhong Soon
The human locomotion is studied through gait analysis and is best observed instrumentally rather than observing visually. Thus, a portable insole pressure mapping system is built to assist in studying the human gait cycle. The pressure distribution is determined by instrumentally mapping the insole using force sensitive resistive sensors that are connected to Arduino UNO via cables. The values are saved into a secure digital card that could be post processed. Hardware and software design phase are executed for the development of this project. The outcomes match to the knowledge of human gait definitions in static posture and normal walking.
Volume: 15
Issue: 4
Page: 1493-1500
Publish at: 2017-12-01

A Load-Balanced Parallelization of AKS Algorithm

10.12928/telkomnika.v15i4.6049
Ardhi Wiratama; Universitas Gadjah Mada, Indonesia Baskara Yudha , Reza; Universitas Gadjah Mada, Indonesia Pulungan
The best known deterministic polynomial-time algorithm for primality testing right now is due to Agrawal, Kayal, and Saxena. This algorithm has a time complexity O(log^{15/2}(n)). Although this algorithm is polynomial, its reliance on the congruence of large polynomials results in enormous computational requirement. In this paper, we propose a parallelization technique for this algorithm based on message-passing parallelism together with four workload-distribution strategies. We perform a series of experiments on an implementation of this algorithm in a high-performance computing system consisting of 15 nodes, each with 4 CPU cores. The experiments indicate that our proposed parallelization technique introduce a significant speedup on existing implementations. Furthermore, the dynamic workload-distribution strategy performs better than the others. Overall, the experiments show that the parallelization obtains up to 36 times speedup. 
Volume: 15
Issue: 4
Page: 1883-1894
Publish at: 2017-12-01

Investigating Maturity State and Internal Properties of Fruits Using Non-destructive Techniques-a Review

10.12928/telkomnika.v15i4.7236
Mohd; Universiti Tun Hussein Onn, Malaysia Fadzli Abd Shaib , Ruzairi; Universiti Tun Hussein Onn, Malaysia Abdul Rahim , S.; Universiti Tun Hussein Onn, Malaysia Z. M. Muji , Azian; Universiti Teknologi Malaysia, Malaysia Abd Aziz Ahmad
The evaluation of internal condition of the fruit via destructive techniques mostly damaged the internal and external fruit structure. However, there are several non-destructive techniques available could be applied in the agricultural industry, specifically for observing internal fruit conditions. Different kinds of internal conditions of fruits are evaluated in terms of their quality and ripeness levels. These non-destructive techniques include fruit evaluation via ultrasonic measurement techniques, light spectroscopy, imaging via Magnetic Resonance Imaging (MRI) and X-Ray, computer vision, electric nose and also vibration. The capabilities and the effectiveness of these techniques towards fruit monitoring are thoroughly discussed. Besides, the drawback of these non-destructive technique has been analysed.
Volume: 15
Issue: 4
Page: 1574-1584
Publish at: 2017-12-01

Investigation of the Optimal Position of Wind Sensors and Wind Turbines on a Building: A Computational Fluid Dynamics Study

10.11591/ijeecs.v8.i3.pp756-761
Leon Chan , Mohd Eqwan Bin Mohd Roslan , Hassan Bin Mohamed
Most numerical studies on flow over buildings simplify the geometry of the roof and assume that it is flat. This may lead to misrepresentation of the flow as the roof of actual buildings contains some sort of roughness. In this study, the flow over the administrative building of Universiti Tenaga Nasional is investigated for multidirectional flow conditions. The actual topology of the building is gridded and simulated using the steady-state Reynolds-averaged Navier-Stokes equation. Four points at the top of the building are identified and the wind statistics at these designated locations at three different heights are investigated. The optimal location with the highest average wind speed and consistent wind speeds for all wind angles is identified and is earmarked as a potential location to install the wind turbine. 
Volume: 8
Issue: 3
Page: 756-761
Publish at: 2017-12-01

Compact Dual-band Parallel Coupled T-shaped SIR Filter for WLAN Applications

10.12928/telkomnika.v15i4.5584
Emad S.; University of Technology, Iraq Ahmaed
In this article, a new compact dual-band bandpass filter was introduced. The filter utilized two operating bands centered at 2.45 GHz and 5 GHz widely used for wireless local area network applications. The filter consists of T-shaped sections of step impedance resonator. The structure is an even symmetrical around electrical or magnetic wall, so the operation mechanism of the filter can be analyzed by an even- and odd-mode transmission line theory. The resonator structure is parallel coupled to a pair of 50 Ω input/output ports. Proper feeding and coupling structures can realize at least two transmission zeros around each of the operating band. To enhance the spurs rejection in the out of the band response of the filter, additive transmission zero at 10 GHz was created by adding stub of quarter guided wavelength at a selected distant from the output port edge. The filter is designed and optimized using the full wave Electromagnetic simulator. The center frequency of the designed bands can be easily refined by the filter dimensions. The overall dimension of the filter is (where  is the guided wavelength at the frequency of 2.45 GHz) corresponding to 14.3 mm x 22 mm.
Volume: 15
Issue: 4
Page: 1677-1681
Publish at: 2017-12-01

Parallel Connected VSI Inverter using Multi-carrier based Sinusoidal PWM Technique

10.12928/telkomnika.v15i4.6477
D.; SRM University, India Karthikeyan , R.; SRM University, India Palanisamy , K.; SRM University, India Vijayakumar , A.; Navodaya Institute of Technology, India Velu , D.; SRM University, India Selvabharathi
This paper explains the simulation and modelling of Parallel operation of VSI inverter using multi-carrier based PWM technique. By this proposed method three level inverter output voltages generated instead of using multilevel inverter or two level dual VSI inverter. This system employs single dc voltage source, which gives supply to both VSI inverter by using parallel connection. The multi-carrier based pulse width modulation technique affianced to control the inverter power switches. The proposed system offers improved output voltage, better current control and reduced harmonic distortion. The simulation results of this proposed system was verified using matlab/simulink.
Volume: 15
Issue: 4
Page: 1625-1631
Publish at: 2017-12-01

Fault Distance Identification Using Impedance and Matching Approaches on Distribution Network

10.11591/ijeecs.v8.i3.pp770-778
Lilik Jamilatul Awalin , H. Mokhlis , M. K. Rahmat , Sophi Shilpa , Fadi Albatsh , Bazilah Ismail
In this paper, impedance based method and matching approaches were used separately to detect three phase to ground fault (LLLGF). In order to observe the accuracy of each method, Non-homogeneous distribution network was used as a tested network. Actual data from TNB (Tenaga National Berhad) Malaysia was adopted to model the network by using PSCAD/EMTDC simulation program.  Both methods were tested to observe the accuracy of fault distance estimation. The comparison result shows different accuracy for each section which simulated in the middle of section. Based on the complexity of the distribution network, it possible to contribute difficulty to obtain the maximum accuracy. The result was obtained through the complete process which involves the database formation acquired through the PSCAD/EMTDC software simulator and the fault location distance calculation carried out by the MATLAB software.
Volume: 8
Issue: 3
Page: 770-778
Publish at: 2017-12-01

Capacitive and Inductive Line Reactance for Network Reconfiguration

10.11591/ijeecs.v8.i3.pp751-755
Aiman Suhailah Saifuddin , Karmila Kamil , Halimatun Hashim , Ruthraganapathy Radhakrishnan
Solar PV may cause power congestion to occur in a transmission line when there is high solar irradiance that causing solar PV to generate more power flow than demanded power flow. Transmission line congestion that can be made worst by adding extra power generating farm such as centralized PV farm of renewable energy which helps to deliver customers with the demand or load required. The power generated coming from solar PV is depending on the weather and can definitely worsen the flow in transmission line due to the power captured. In this case, the high solar irradiance can affect the power generated from solar PV and will cause power congestion when power generated is higher than the load demanded. In this paper, the proposed method used to overcome the power congestion in a transmission line is by rerouting the excess power from the overloaded line to underloaded line by changing the line reactance of the line. An IEEE 30 bus test system is developed in PSS/E software as the test system. The output monitored is the line stability index of the affected line before and after rerouting process.
Volume: 8
Issue: 3
Page: 751-755
Publish at: 2017-12-01

The Impact of Color Space and Intensity Normalization to Face Detection Performance

10.12928/telkomnika.v15i4.6718
I Nyoman; Udayana University Bukit Jimbaran Politeknik Negeri Bali, Indonesia Gede Arya Astawa , I Ketut; Udayana University, Indonesia Gede Darma Putra , I; Udayana University, Indonesia Made Sudarma , Rukmi; Udayana University, Indonesia Sari Hartati
In this study, human face detection have been widely conducted and it is still interesting to be research. In this research, strong impact of color space for face i.e., many and multi faces detection by using YIQ, YCbCr, HSV, HSL, CIELAB, and CIELUV are proposed. In this experiment, intensity normality method in one of the color space channel and tested the faces using Android based have been developed. The faces multi image datasets came from social media, mobile phone and digital camera. In this experiment, the color space YCbCr percentage value with the image initial value detection before processing are 67.15%, 75.00%, and 64.58% have been reached. Then, after the normalization process are 83.21%, 87.12%, and 80.21% have been increased. Furthermore, this study showed that color space of YCbCr have reached improvement percentage
Volume: 15
Issue: 4
Page: 1895-1900
Publish at: 2017-12-01
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