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29,758 Article Results

Intelligent home automated system

10.11591/ijeecs.v15.i2.pp733-742
R MF Amin , R FA Yasmin , A. N. Azlina , AB Zanariah , Y Faridah
Home automation system is one of the intelligent systems meant to create new opportunities for industry and business, as well as new experiences for users and consumers. This project is about designing, developing and testing a web-based intelligent home automation system called i-Home. The main users will be residents in any residential area i.e. gated community, terrace housing area, condominium and others. Its function is to ease residents in controlling the lights, fans, air conditioning, the house temperature and monitoring their CCTVs through online. For the hardware component Raspberry Pi was used due to its low cost, credit card-sized single-board computer that includes a processor, GPU, RAM and MicroSD as the server. Raspberry Pi primarily uses Linux-kernel-based operating system. It also requires PHP, JavaScript, Python and MySQL. The prototype of the system was built and performed most of the functions of home automation system. Usability and functional testing were carried out and both results showed that all functions worked perfectly.
Volume: 15
Issue: 2
Page: 733-742
Publish at: 2019-08-01

Detection air pollution based on infrared image processing

10.12928/telkomnika.v17i4.12824
Sri Ratna; University of Lampung Sulistiyanti , F. X. Arinto; University of Lampung Setyawan , Muhamad; University of Lampung Komarudin
This paper proposes a method of detecting air pollution in a region using image processing techniques. The image used is the infrared image that obtained using a modified digital camera by mounting the SRS filter. Image processing technique used is to utilize wavelet transformation. Pollutants are detected based on the average number of white pixels that appear on the image. This white pixel appears due to the reflection of the wavelength of the pollutant that hits the sensor on the camera. From the results of the proposed method detection is known that the highest pollution occurs in 12.00 which is the busiest traffic time and the lowest pollution occurred in 08.00 where the traffic passing through the area has not been crowded.
Volume: 17
Issue: 4
Page: 1796-1802
Publish at: 2019-08-01

Design and Optimization of Inductively Coupled Spiral Square Coils for Bio-Implantable Micro-System Device

10.11591/ijece.v9i4.pp2637-2647
Abdelghani Lakhdari , Nasr-Eddine Mekkakia Maaza , Meriem Dekmous
Due to the development of biomedical microsystems technologies, the use of wireless power transfer systems in biomedical application has become very largely used for powering the implanted devices. The wireless power transfer by inductive resonance coupling link, is a technic for powering implantable medical devices (IMDs) between the external and implanted circuits. In this paper we describe the design of an inductive resonance coupling link using for powering small bio-implanted devices such as implantable bio-microsystem, peacemaker and cochlear implants. We present the reduced design and an optimization of small size obtained spiral coils of a 9.5 mm2 implantable device with an operating frequency of 13.56 MHz according to the industrial scientific-medical (ISM). The model of the inductive coupling link based on spiral square coils design is developed using the theoretical analysis and optimization geometry of an inductive link. For a mutual distance between the two coils at 10mm, the power transfer efficiency is about 79% with , coupling coefficient of 0.075 and a mutual inductance value of 2µH. In comparison with previous works, the results obtained in this work showed better performance such as the weak inter coils distance, the hight efficiency power transfer and geometry.
Volume: 9
Issue: 4
Page: 2637-2647
Publish at: 2019-08-01

Seller reputation impact on sales performance in public e-marketplace Bukalapak

10.12928/telkomnika.v17i4.11780
M. Ammar; Institut Teknologi Sepuluh Nopember Fauzan , Amna Shifia; Institut Teknologi Sepuluh Nopember Nisafani , Arif; Institut Teknologi Sepuluh Nopember Wibisono
Seller reputation system (SRS) is an online facility in the public e-marketplace to assess how trustworthy a seller is. SRS becomes important for customers to increase transactional confidence and help customers avoiding untrustworthy sellers. Previous research indicates that different countries with different cultures will lead to different results on how seller reputation influence sales performance. This study aims to investigate the impact of seller reputation on the number of sales in the context of the Indonesian market. This research uses Bukalapak as the case study, which the majority of its customers are Indonesian. Further, this study employ multiple regression analysis on smartphone sales data. The result shows that in Indonesian online market context, the number of seller’s followers does not affect sales number. Furthermore, price and seller positive reviews have a significant impact on sales performance. This study provides insight for sellers in the Indonesian marketplace on how to improve sales performance based on seller reputation.
Volume: 17
Issue: 4
Page: 1810-1817
Publish at: 2019-08-01

Performance enhancement of maximum power point tracking for grid-connected photovoltaic system under various gradient of irradiance changes

10.12928/telkomnika.v17i4.10335
Mario Norman; SMK N 1 Blado Syah , Subiyanto; Universitas Negeri Semarang Subiyanto
This paper presents a new variant of smart adaptive algorithm of Maximum Power Point Tracking (MPPT) in the photovoltaic (PV) system. The algorithm was adopted from Modified Perturb and Observe (MP&O). The smart adaptive MPPT is used to search Maximum Power Point (MPP) of the PV system under various irradiance changes. This algorithm incorporates information of current change (ΔI), maximum operating point margin and dynamic perturbation step to prevent MPPT diverging away from the MPP and minimize the steady state oscillation. The smart adaptive MPPT algorithm performance is compared with the dI-P&O and conventional P&O to prove its effectiveness. The comparison is performed under the various gradient of irradiance change. It was found that, for all the tests, the smart adaptive algorithm scheme improve the tracking efficiency under various gradients of irradiance changes and increase the efficiency of extraction power from PV system.
Volume: 17
Issue: 4
Page: 1973-1984
Publish at: 2019-08-01

Adapted Branch-and-Bound Algorithm Using SVM With Model Selection

10.11591/ijece.v9i4.pp2481-2490
Mohamed Mustapha Kabbaj , El Afia Abdellatif
Branch-and-Bound algorithm is the basis for the majority of solving methods in mixed integer linear programming. It has been proving its efficiency in different fields. In fact, it creates little by little a tree of nodes by adopting two strategies. These strategies are variable selection strategy and node selection strategy. In our previous work, we experienced a methodology of learning branch-and-bound strategies using regression-based support vector machine twice. That methodology allowed firstly to exploit information from previous executions of Branch-and-Bound algorithm on other instances. Secondly, it created information channel between node selection strategy and variable branching strategy. And thirdly, it gave good results in term of running time comparing to standard Branch-and-Bound algorithm. In this work, we will focus on increasing SVM performance by using cross validation coupled with model selection. 
Volume: 9
Issue: 4
Page: 2481-2490
Publish at: 2019-08-01

Hybrid fuzzy-sliding grasp control for underactuated robotic hand

10.12928/telkomnika.v17i4.12678
Fredy; Universidad Distrital Francisco José de Caldas Martinez , Holman; Universidad Distrital Francisco José de Caldas Montiel , Edwar; Universidad Distrital Francisco José de Caldas Jacinto
A major part of the success of human-robots integration requires the development of robotic platforms capable of interacting in human environments. Human beings have an environment designed for their physical and morphological capacity, robots must adapt to these conditions. This paper presents a fuzzy-sliding hybrid grasp control for a five-finger robotic hand. As a design principle, the scheme takes into account the minimum force required on the object to prevent the object from slipping. The robotic hand uses force sensors on each finger to determine the grasp state. The control is designed with two control surfaces, one when there is slippage, the other when there is no slippage. For each surface, control rules are defined and unified by means of a fuzzy inference block. The proposed scheme is evaluated in the laboratory for different objects, which include spherical and cylindrical elements. In all cases, an excellent grasp was observed without producing deformations in the fragile objects.
Volume: 17
Issue: 4
Page: 2070-2075
Publish at: 2019-08-01

Regional gradient optimal control problem governed by a distributed bilinear systems

10.12928/telkomnika.v17i4.11275
Maawiya Ould; Jouf University Sidi , Sid Ahmed; Jouf University Beinane
This paper gives an extension of previous work on gradient optimal control of distributed parabolic systems to the case of distributed bilinear systems which are a type of nonlinear systems. We introduce the notion of flux optimal control of distributed bilinear systems. The idea is trying to achieve a neighborhood of the gradient state of the considered system by minimizing a nonlinear quadratic cost. Using optimization techniques, a method showing how to reach a desired flux at a final time, only on internal subregion of the system domain will be proposed. The proposed simulation illustrates the theoretical approach by commanding the heat bilinear equation flux to a desired profile.
Volume: 17
Issue: 4
Page: 1957-1965
Publish at: 2019-08-01

Space charges analysis on insulator with uniform layer contamination effect

10.12928/telkomnika.v17i4.12765
Mohd Haris Asyraf Shee; Universiti Tun Hussein Onn Malaysia (UTHM) Kandar , Nor Akmal Mohd; Universiti Tun Hussein Onn Malaysia (UTHM) Jamail , Qamarul Ezani; Universiti Tun Hussein Onn Malaysia (UTHM) Kamarudin , Nordiana Azlin; Universiti Tun Hussein Onn Malaysia (UTHM) Othman , Nor Asiah; Universiti Sains Malaysia Muhamad
High voltage direct current (HVDC) transmission provides an attractive alternative for bulk power transfer. However, HVDC transmission may have loss about half per unit length of high voltage alternating current (HVAC) at the same amount of power carried. This is due to the space charge formation around the conductor in HVDC cables. It is known that the presence of space charge inside an insulator may distort the local electric field and surface energy. This paper investigates the effect of electrostatics for space charge, electric field and surface energy in the HVDC cable in clean and contaminated conditions. The effect of uniform layer contamination from oil, sandstone and fresh water was conducted on 11 kV XLPE cable using finite element software under electrostatics study. The contamination layer was created around the XLPE cable by multifarious the radius of layer contamination from the conductor. The simulation results show that enlargement of contamination layer radius by 1.0 mm (light), 1.5 mm (medium) and 2.0 mm (heavy) resulted in the reduction of surface energy by 20% and electric field by 22% but increase the space charge amplitude by 76%. The study also found that fresh water can be considered as the worst contamination compared to oil and sandstone.
Volume: 17
Issue: 4
Page: 2001-2007
Publish at: 2019-08-01

Efficient datamining model for prediction of chronic kidney disease using wrapper methods

10.11591/ijict.v8i2.pp63-70
Ramaswamyreddy A , Shiva Prasad S , K V Rangarao , A Saranya
In the present generation, majority of the people are highly affected by kidney diseases. Among them, chronic kidney is the most common life threatening disease which can be prevented by early detection. Histological grade in chronic kidney disease provides clinically important prognostic information. Therefore, machine learning techniques are applied on the information collected from previously diagnosed patients in order to discover the knowledge and patterns for making precise predictions. A large number of features exist in the raw data in which some may cause low information and error; hence feature selection techniques can be used to retrieve useful subset of features and to improve the computation performance. In this manuscript we use a set of Filter, Wrapper methods followed by Bagging and Boosting models with parameter tuning technique to classify chronic kidney disease. The capability of Bagging and Boosting classifiers are compared and the best ensemble classifier which attains high stability with better promising results is identified.
Volume: 8
Issue: 2
Page: 63-70
Publish at: 2019-08-01

An obstacle aware mobile sink path strategy in WSN

10.11591/ijeecs.v15.i2.pp879-887
T. H. Feiroz Khan , D. Siva Kumar
In Wireless Sensor Networks, Mobile Sink accomplishes considerable achievement on network lifetime improvement. In sensing environment, more chances to present the obstacle. But, in the mobile sink, how to identify the obstacle and make the obstacle aware path strategy is a challenging task. To overcome this problem, we propose an Obstacle Aware Mobile sink Path Strategy (OAMPS) that detects any obstacles which enter within the network lifetime and design a shortest mobile sink movement path avoiding detected obstacles. In this scheme, the mobile sink collects the sensing data from the super node then it sends the data to the base station. Here, static or moving obstacles are present when the mobile sink moves the path scheduling by spanning graph. This algorithm is introduced to discovering the obstacle avoiding shortest path. The source selects the route by the updated cuckoo search algorithm. The simulation results show that the OAMPS improved the throughput and minimized the delay in the network.
Volume: 15
Issue: 2
Page: 879-887
Publish at: 2019-08-01

A 5G graphene antenna produced by screen printing method

10.11591/ijeecs.v15.i2.pp950-955
Siti Nor Hafizah Sa’don , Mohd Haizal Jamaluddin , Muhammad Ramlee Kamarudin , Fauzan Ahmad , Samsul Haimi Dahlan
The save and fast manufacturing are required in order to achieve 5G technology. However, there are many kinds of manufacturing antenna which are depending on material applied in the antenna itself. Each type of manufacturing also has its own advantages and drawback. In this article, a graphene antenna for 5G applications is manufactured using screen printing method. A fine mesh resolution of 120 µm is used to print the antenna accurately. This kind of printing has capability to produce antenna in less than 5 minutes. The antenna made by conductive graphene ink has size of 11.8 x 12.2 x 0.076 mm3 and produced within a small amount of graphene ink. The measured antenna resonates at 15.04 GHz with reflection coefficient magnitude of -12.05 dB and percentage of impedance bandwidth is 30 % which is in the range of 13.3 to 18.0 GHz. The radiation pattern at E-plane and H-plane of the graphene antenna are simulated and measured where the result obtained are comparable.
Volume: 15
Issue: 2
Page: 950-955
Publish at: 2019-08-01

Plasma generator: design of six stage cockcroft-walton voltage multiplier 12 kV for impulse voltage generation

10.12928/telkomnika.v17i4.11828
Wijono; Brawijaya University Wijono , Eka; Brawijaya University Maulana , Dony Darmawan; National Sun Yat-sen University Putra , Waru; Brawijaya University Djuriatno
Cockcroft-Walton (CW) voltage multiplier is a voltage booster circuit with an array of series-connected only diodes and capacitors. In this research, voltage multiplier is designed to generate voltage up to 12 kV that the modified 6-stage constructed generator. It is designed as circuit charger of storage capacitor (CS) to generate combination wave impulse application which following standard those set in IEC (International Electrotecnical Commission) 61000-4-5 class 4. CS should be charged up to 4 kV according this standard. High impulse voltage and current works repeatedly in a short time, so the charging system is expected to reach targeted voltage within a maximum time of 10 seconds. Besides charging is also required to design of circuit discharger for discharging electric charge inside the CS. It is expected to reach 0 kV within a maximum time of 15 seconds with overdamped technique. There are three results of the research projects such as output voltage of CW voltage multiplier before connecting CS, charging time of CS, and discharging time of CS. The result showed that CW voltage multiplier can generate up to 12.01 kV on simulation and 11.9 kV on experiment. CS can be charged up to 4 kV in 9.8 seconds on simulation and 7.9 seconds on experiment. CS can be discharged in 14.2 seconds on simulation and 10 seconds on experiment. These results are in accordance with the expectation.
Volume: 17
Issue: 4
Page: 1890-1897
Publish at: 2019-08-01

Efficient P2P data dissemination in integrated optical and wireless networks with Taguchi method

10.12928/telkomnika.v17i4.12776
M. A.; Universiti Teknikal Malaysia Melaka Wong , Jamil Abedalrahim Jamil; Universiti Teknikal Malaysia Melaka Alsayaydeh , Sevia Mahdaliza; Universiti Teknologi Malaysia Idrus , Nadiatulhuda; Universiti Teknologi Malaysia Zulkifli , M.; Universiti Malaysia Perlis Elshaikh
The Quality of Service (QoS) resource consumption is always the tricky problem and also the on-going issue in the access network of mobile wireless part because of its dynamic nature of network wireless transmissions. It is very critical for the infrastructure-less wireless mobile ad hoc network that is distributed while interconnects in a peer-to-peer manner. Toward resolve the problem, Taguchi method optimization of mobile ad hoc routing (AODVUU) is applied in integrated optical and wireless networks called the adLMMHOWAN. Practically, this technique was carry out using OMNeT++ software by building a simulation based optimization through design of experiment. Its QoS network performance is examined based on packet delivery ratio (PDR) metric and packet loss probabilities (PLP) metric that consider the scenario of variation number of nodes. During the performing stage with random mobile connectivity based on improvement in optimized front-end wireless domain of AODVUU routing, the result is performing better when compared with previous study called the oRia scheme with the improvement of 14.1% PDR and 43.3% PLP in this convergence of heterogeneous optical wireless network.
Volume: 17
Issue: 4
Page: 1642-1647
Publish at: 2019-08-01

Address-light and energy aware routing protocol for wireless sensor network

10.12928/telkomnika.v17i4.8662
Hamdollah; Payame Noor University Ghamgin
In recent years, sensor networks applications were used in many criteria. Because of its vast applications, so many researchers studied these networks. Wireless sensor networks contain significant number of sensor nodes; they are suitable medium for collecting and sending data or informing the sink about an event. This study presents a new integrated method for routing in sensor networks which is based on remaining energy of the nodes and existing space between each node and the sink. This method is more suitable for large and medium volume of data. Lifetime enhancement of the network is the main purpose of this method which is obtained by fair division of nodes roles in transmission of data to the sink. In ALERP algorithm (Address Light, Label-Based and Energy-Aware Routing Protocol), in order to reduce network overload and energy consuming as well as enhancement of network lifetime, we used predetermined routes as well as routing based on packet labels. Energy consumption in the entire network is another advantage of this method. The existence of various parameters on this algorithm will lead to more flexibility of it. Generally, conducted simulations indicate higher uniformity in energy consumption of nodes.
Volume: 17
Issue: 4
Page: 1674-1682
Publish at: 2019-08-01
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