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29,734 Article Results

Performance evaluation of optical attocells configuration in an indoor visible light communication

10.11591/ijeecs.v14.i2.pp668-676
M.S. M. Gismalla , M.F. L. Abdullah
Visible light communication VLC is deemed as futuristic technology applied for both illumination and data communication due to the low-cost energy consumption, long life expectancy, huge bandwidth, and high security compared to radio frequency RF. Uncovered area, minimum signal-to-noise ratio (SNR) and received power results from the non-uniform distribution of small base stations (i.e. Optical attocells) in the room. In this paper, the researchers propose a new LEDs distribution of five optical attocells configuration model in order to optimize the received power distribution and SNR at the center of the room for indoor VLC system. The optical attocells configuration in terms of received power to fill the uncovered area at the center of the room has been investigated. The simulation results showed that the proposed attocells configuration saved 24.9% of the transmitted power. Besides that, the whole room was covered uniformly.  As a result, the received power and SNR are improved.
Volume: 14
Issue: 2
Page: 668-676
Publish at: 2019-05-01

Optimization of high-k composite dielectric materials of variable oxide thickness tunnel barrier for nonvolatile memory

10.11591/ijeecs.v14.i2.pp765-772
Farah A.Hamid , Afiq Hamzah , N. Ezaila Alias , Razali Ismail
Downscaling the tunnel oxide thickness has become one of the innovative solutions to minimize the operational voltage with better the programming/erasing (P/E) operation time. However, the downscaling technique faces several challenges where the conventional SiO2 tunnel layer has reached its limit. But a practical alternative has been introduced; Variable Oxide Thickness (VARIOT) technology in flash memory has been promising. VARIOT is one of tunnel barrier engineering technology for incorporating the high-k dielectric materials as a composite tunnel barrier. This paper presents the VARIOT concept to determine the optimum set of combination, the equivalent oxide thickness (EOT) and the low-k oxide thickness (Tox) for alternate high-k materials. Fowler-Nordheim (F-N) tunneling coefficients are also extracted for various combinations of VARIOT, where in this work ZrO2, HfO2, Al2O3, La2O3, and Y2O3 are used. The VARIOT optimization is conducted using 3-Dimensional (3D) Silicon Nanowire Field-Effect-Transistor (SiNWFET) device structure and simulated in TCAD Simulation tools. From the simulation results, it has found out that the high-k materials of La2O3 asymmetric stack is the excellent dielectric material among four (4) other dielectric materials; ZrO2, HfO2, Al2O3 and Y2O3 for EOT=4nm and Tox=1nm. 
Volume: 14
Issue: 2
Page: 765-772
Publish at: 2019-05-01

Frequency selective surfaces on flexible thin plastic substrates

10.11591/ijeecs.v14.i2.pp819-825
N. A. F. M. Zainudin , S.N. Azemi , M.F. Jamlos , A.A. Al-Hadi , P.J. Soh
The capability of the flexible substrate of the frequency selective surface (FSS) to filter out particular frequency is discussed in this paper. A new type of FSS are applied using flexible thin plastic substrate to enhance the performance of the conventional FSS that lacks of flexibility and cannot be used in bending surface. A simulation based investigation shows that the diameter or length of the square has a significant effect on the band-stop selective characteristic of the FSS. The frequency response of the band-stop are at 2.45GHz that drop at -10dB.
Volume: 14
Issue: 2
Page: 819-825
Publish at: 2019-05-01

e-PADI: an iot-based paddy productivity monitoring and advisory system

10.11591/ijeecs.v14.i2.pp852-858
M.A.F. Ismail , M. N. Md. Isa , S. N. Mohyar , M.I. Ahmad , M. N. M. Ismail , R. C. Ismail , A. Harun , S.A.Z. Murad
Rice is source of food calories and protein.  This second most widely grown cereal crop is the staple food for more than half the world’s population especially in developing countries.  The ability of global rice production to meet population demands (now estimated at more than 5 billion and projected to rise to 8.9 billion by 2050) remains in uncertainty in the near future unless challenges in rice production are properly addressed [1-3]. This paper proposed an IoT (Internet of things)-based paddy productivity monitoring and advisory system Using Dash7 Wireless Network Protocol. All collected data will be stored in a database management system to enable users to retrieve data either from tablets, smartphones or computers. The heart of the system is the ATmega328p microcontroller that will control the payload of the wireless network of dash7 and read data from sensor nodes. Results show all data from sensor nodes in representation of graph for analysis purpose.
Volume: 14
Issue: 2
Page: 852-858
Publish at: 2019-05-01

Safe sailing: GSM and GPS controlled autonomous boat with overweight detection and obstacle avoidance

10.11591/ijeecs.v14.i2.pp715-724
Shadman Sakib Arnob , Adiba Sumaiya Khan , Rashed Shelim , Mahmood Chowdhury
This paper aims to save thousands of lives by proposing a novel technique of ensuring the complete safety of medium-sized aquatic vehicles using innovative ideas as well as augmented adaptations of myriad existing technologies. The proposed system incorporates a warning and danger level detection circuit using transistors for switching purposes when the vehicles are overloaded, and a Global System for Mobile (GSM) based module so that the control room can receive alerts and control the engines of such vehicles centrally. A system for detecting and avoiding obstacles is made using ultrasonic radar with ultrasonic transducer JSN SR04t mounted on top of SG90 servo arm which rotates to detect any obstacles. When an obstacle is detected, two other ultrasonic sensors SR-04 gets activated which are placed on two sides of the aquatic vehicle and the ultrasonic transducer becomes fixed on the exact centre. All the three sensors work together to find a free path for the boat to travel. If there is no free path, the boat will stop and wait for the paths to get cleared. The location of the vehicle is tracked by the Global Positioning System (GPS) and a Proportional-Integral-Derivative (PID) controller has been included along with a system which uses values from the GPS module to come back to its original path if it deviates from the original path when avoiding obstacles. A barcode system has been added where it keeps a count on the passengers. The tickets for the vehicle will have barcodes on them which will let the passengers in only if the barcode matches. This is used mainly to keep track of how many people are boarding the vehicle and to prevent those without tickets from boarding.
Volume: 14
Issue: 2
Page: 715-724
Publish at: 2019-05-01

A data mining process using classification techniques for employability prediction

10.11591/ijeecs.v14.i2.pp1025-1029
Saouabi Mohamed , Abdellah Ezzati
The use of the data mining has become wider today; it can be applied in several fields like marketing, customer relationship management, medicine, engineering, etc. It can be used also in employability, the use of data mining in this field will give opportunities and solution for decision makers in this field in order to improve the employability and propose solutions. In this paper, we propose a data mining process for employability data using classification techniques, presenting in details all the phases in the process and what should be done in every phase. We used Rapid Miner Studio Educational Version 8.1.000, using an employability dataset.
Volume: 14
Issue: 2
Page: 1025-1029
Publish at: 2019-05-01

Design and analysis of dedicated real-time clock for customized microcontroller unit

10.11591/ijeecs.v14.i2.pp796-801
M.N. A.M. Alias , S. N. Mohyar , M. N. Isa , A. Harun , A. B. Jambek , S.A. Z. Murad
In this paper, a Real Time Clock (RTC) system for a dedicated microcontroller is proposed to provide the customized microcontroller its own time and date system. The RTC is developed using Verilog Hardware Description Language (HDL) and simulated using Synopsys software. This RTC is developed with standard Advance Peripheral Bus (APB) to be interfacing with the microcontroller through Advanced Microcontroller Bus Architecture (AMBA). This RTC will be used as an on-chip RTC in the microcontroller system to provide precise time and date which can be used for various applications. The basic architecture of RTC, APB standard for interfacing the RTC with AMBA bus, and the result in term of RTL, waveform, and layout will be discussed in this documentation. For this research, the part covered is on the logic part of the RTC that is bus interface, register, frequency divider and counter.
Volume: 14
Issue: 2
Page: 796-801
Publish at: 2019-05-01

Institutional smart buildings energy audit

10.11591/ijece.v9i2.pp783-788
Ali M Baniyounes , Yazeed Yasin Ghadi , Ayman Abu Baker
Smart buildings and Fuzzy based control systems used in Buildings Management System (BMS), Building Energy Management Systems (BEMS) and Building Automation Systems (BAS) are a point of interests among researcher and stake holders of buildings’ developing sector due to its ability to save energy and reduce greenhouse gas emissions. Therefore this paper will review, investigates define and evaluates the use of fuzzy logic controllers in smart buildings under subtropical Australia’s subtropical regions. In addition the paper also will define the latest development, design and proposed controlling strategies used in institutional buildings. Furthermore this paper will highlight and discuss the conceptual basis of these technologies including Fuzzy, Neural and Hybrid add-on technologies, its capabilities and its limitation.
Volume: 9
Issue: 2
Page: 783-788
Publish at: 2019-04-01

Feature selection, optimization and clustering strategies of text documents

10.11591/ijece.v9i2.pp1313-1320
A. Kousar Nikhath , K. Subrahmanyam
Clustering is one of the most researched areas of data mining applications in the contemporary literature. The need for efficient clustering is observed across wide sectors including consumer segmentation, categorization, shared filtering, document management, and indexing. The research of clustering task is to be performed prior to its adaptation in the text environment. Conventional approaches typically emphasized on the quantitative information where the selected features are numbers. Efforts also have been put forward for achieving efficient clustering in the context of categorical information where the selected features can assume nominal values. This manuscript presents an in-depth analysis of challenges of clustering in the text environment. Further, this paper also details prominent models proposed for clustering along with the pros and cons of each model. In addition, it also focuses on various latest developments in the clustering task in the social network and associated environments.
Volume: 9
Issue: 2
Page: 1313-1320
Publish at: 2019-04-01

Development and implementation of a miniature RFID system in a shopping mall environment

10.11591/ijece.v9i2.pp1374-1378
Ademola Abdulkareem , Awosope C. O. A. , Tope-Ojo A. E.
The advancement of technology has brought about the need for industrial innovation. One area where innovation is required in a developing country is in the retail industry (this is the focus point of this project) where the present system that is the barcode technology is old and archaic. This project is based on the use of Radio Frequency Identification (RFID) technology to create a faster, easier and more secured checkout system. This paper showcases the development of a miniature RFID desktop application that can be used for registering items coming into a shopping mall, checking out of goods bought from the shopping mall and the detection of an attempt to steal goods from the shopping mall, using both C# programming language and MySQL for the database management.
Volume: 9
Issue: 2
Page: 1374-1378
Publish at: 2019-04-01

Residential load event detection in NILM using robust cepstrum smoothing based method

10.11591/ijece.v9i2.pp742-752
Nur Iksan , Jaka Sembiring , Nanang Hariyanto , Suhono Harso Supangkat
Event detection has an important role in detecting the switching of the state of the appliance in the residential environment. This paper proposed a robust smoothing method for cepstrum estimation using double smoothing i.e. the cepstrum smoothing and local linear regression method. The main problem is to reduce the variance of the home appliance peak signal. In the first step, the cepstrum smoothing method removed the unnecessary quefrency by applying a rectangular window to the cepstrum of the current signal. In the next step, the local regression smoothing weighted data points to be smoothed using robust least squares regression. The result of this research shows the variance of the peak signal is decreased and has a good performance with better accuracy. In noise enviromment, performance prediction quite good with values greater than 0.6 and relatively stable at values above 0.9 on SNR> 25 for single appliances. Furthermore, in multiple appliances, performance prediction quite good at SNR> 20 and begins to decrease in SNR <20 and SNR> 25.
Volume: 9
Issue: 2
Page: 742-752
Publish at: 2019-04-01

New robust bounded control for uncertain nonlinear system using mixed backstepping and lyapunov redesign

10.11591/ijece.v9i2.pp1090-1099
Muhammad Nizam Kamarudin , Sahazati Md. Rozali , T. Sutikno , Abdul Rashid Husain
This paper presents a new robust bounded control law to stabilize uncertain nonlinear system with time varying disturbance. The design idea comes from the advantages of backstepping with Lyapunov redesign, which avoid the needs of fast switching of discontinuous control law offered by its counterpart - a variable structure control. We reduce the conservatism in the design process where the control law can be flexibly chosen from Lyapunov function, hence avoiding the use of convex optimization via linear matrix inequality (LMI) in which the feasibility is rather hard to be obtained. For this work, we design two type control algorithms namely normal control and bounded control. As such, our contribution is the introduction of a new bounded control law that can avoid excessive control energy, high magnitude chattering in control signal and small oscillation in stabilized states. Computation of total energy for both control laws confirmed that the bounded control law can stabilize with less enegry consumption. We also use Euler's approximation to compute average power for both control laws. The robustness of the proposed controller is achieved via saturation-like function in Lyapunov redesign, and hence guaranting asymptotic stability of the closed-loop system.
Volume: 9
Issue: 2
Page: 1090-1099
Publish at: 2019-04-01

Parametric studies of ring and parallel coupled line resonators for matched bandstop filter design

10.11591/ijeecs.v14.i1.pp29-37
Abdullah Mohammed Zobilah , Adib Othman , Noor Azwan Shairi , Zahriladha Zakaria
Recently, matched bandstop filters had become a substantial part of modern RF and microwave systems. However, in these types of filters, the key problem in the couplings of any microstrip resonators to transmission microstrip line is the variation or tolerance of the coupling gap. It was found that the bandstop response is very sensitive to the gap size of the coupled line. Therefore, this paper presents parametric studies of dual-mode parallel coupled line and ring resonator for matched bandstop filter design. For parallel coupled line resonator, it was found that with careful design and proper circuit parametric study on the coupling spacing, very high notch and matched return loss response were obtained. In contrast, for ring resonator, based on the simulated result, it was found that a very high notch and matched return loss response were obtained with careful design and proper circuit parametric study on the coupling spacing, width at coupling lines, and perturbed stub length.
Volume: 14
Issue: 1
Page: 29-37
Publish at: 2019-04-01

Performance analysis of IEEE 802.11ac based WLAN in wireless communication systems

10.11591/ijece.v9i2.pp1131-1136
A. Z. Yonis
IEEE 802.11ac based wireless local area network (WLAN) is emerging WiFi standard at 5 GHz, it is new gigabit-per-second standard providing premium services. IEEE 802.11ac accomplishes its crude speed increment by pushing on three distinct measurements firstly is more channel holding, expanded from a maximum of 80 MHz up to 160 MHz modes. Secondly, the denser modulation, now using 256-QAM, it has the ability to increase the data rates up to 7 Gbps using an 8×8 multiple input multiple output (MIMO). Finally, it provides high resolution for both narrow and medium bandwidth channels. This work presents a study to improve the performance of IEEE 802.11ac based WLAN system.
Volume: 9
Issue: 2
Page: 1131-1136
Publish at: 2019-04-01

PAOD: a predictive approach for optimization of design in FinFET/SRAM

10.11591/ijece.v9i2.pp960-966
Girish H , Shashikumar D. R.
The evolutions in the modern memory units are comeup with FinFET/SRAM which can be utilized over high scaled computing units and in other devices. Some of the recent systems were surveyed through which it is known that existing systems lags with improving the performance and optimization of FinFET/SRAM design. Thus, the paper introduces an optimized model based on Search Optimization mechanism that uses Predictive Approach to optimize the design structure of FinFET/SRAM (PAOD). Using this can achieve significant fault tolerance under dynamic cumpting devices and applications. The model uses mathematical methodology which helps to attain less computational time and significant output even at more simulation iteration. This POAD is cost effective as it provides better convergence of FinFET/SRAM design than recursive design.
Volume: 9
Issue: 2
Page: 960-966
Publish at: 2019-04-01
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