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A review on link adaptation techniques for energy efficiency and QoS in IEEE802.11 WLAN

10.11591/ijeecs.v17.i1.pp331-339
Aliya Syahira Mohd Anuar , Wan Norsyafizan W Muhamad , Darmawaty Mohd Ali , Suzi Seroja Sarnin , Norfishah Ab Wahab
Link adaptation is a technique that able to adapt modulation and coding scheme (MCS) based on radio channel conditions. With the exponential increase on the wireless devices nowadays, it contributes to high energy consumption and an increase in carbon dioxide (CO2) emission which contribute to the environmental issue. Researchers have developed proposals to tackle these issues by design algorithms based on link adaptation technique. Nowadays, various link adaptation techniques have been proposed by researchers with target for either Quality of Service (QoS) enhancement as well as energy efficiency. This paper presents A Review on Link Adaptation Techniques for Energy Efficiency and QoS in IEEE802.11 WLAN. In this study, a comprehensive review of the relevant literature published that focus on link adaptation technique in IEEE 802.11 WLAN in improving the energy efficiency and maximize the QoS performance is presented. Link adaptation can be categorized into transmission power control adaptation, transmission data rate adaptation and joint rate adaptation. These adaptations are carried out according to the channel state information (CSI). CSI can be categorized into signal-to-noise ratio (SNR), bit error rate (BER), delay, and queue length.
Volume: 17
Issue: 1
Page: 331-339
Publish at: 2020-01-01

Dependable estimations for education quality using fuzzy logic based strategy a case study (University of Kufa)

10.11591/ijeecs.v17.i1.pp472-480
Adel Al Janabi , Ehsan Ali Kareem , Radhwan Hussein Abdulzhraa Al Sagheer
The consideration that the Iraqi community has concentrated on the training area has delivered another college responsibility routed to superiority viewpoints for all training connected facilities. In truth, a superiority arranged facility necessitates perfection in the structure and arranging of facility exercises, in addition to amid its conveying for the received facility execution assessment strategy. In any case, considering that facility execution assessments are profoundly founded on partners’ decisions, they can be described by conceivable vulnerabilities identified with deficiency for incomplete obliviousness, imprecision for subjectivity and even dubiousness. In this way, underneath these circumstances, temperamental outcomes can be acquired by broadly measured facility investigation strategies. This paper is a strategy dependent an ongoing augmentation of ServQual display and it utilizes a consolidated way of Fuzzy Set Theory of command process technique that is proposed to adequately deal with vulnerability in facility execution examinations. Specifically, Fuzzy Set Theory is measured to manage vulnerability, while AHP strategy is embraced as device to appraise the significance loads of key facility characteristics. In this way, the key investigation of the facility esteem tree identified with the program in University of Kufa is made by using the planned strategy. The completed facility examination permits the most impacting facility execution components to be caught and remarked. At last, acquired outcomes demonstrate that the teachers' view of facility quality definitively impacts by large facility execution level. 
Volume: 17
Issue: 1
Page: 472-480
Publish at: 2020-01-01

Solar powered peltier cooling storage for vaccines in rural areas

10.11591/ijeecs.v17.i1.pp36-46
Henning Buitendach , Immanuel Ninma Jiya , Rupert Gouws
The research presented in this paper proposes a new design of a vaccine cooling and storage unit that can keep vaccines in the cold chain (2°C to 8°C). This design was done to facilitate effective completion of the African vaccination week. The cooling and storage unit was designed to be compact, portable, well isolated and to make use of a PV solar energy system as a source of electricity. The cooling unit makes use of a Liquid to Air thermoelectric cooling module connected to some tubing and a liquid pump to cool the inside of the cooling unit. The design process also included designing a control system that controls the temperature inside the cooling holder and a monitoring system to monitor the battery voltage and capacity. The system also has a user interface that displays the temperatures inside and outside of the cooling holder, as well as the battery voltage and capacity. The cooling system successfully developed was able to keep vaccines in the cold chain for up to three days, the system could control the temperature of the vaccines with an accuracy of 1°C and was small and portable, but still had enough room to house up to 250 vaccines.
Volume: 17
Issue: 1
Page: 36-46
Publish at: 2020-01-01

A new kind of parameter conjugate gradient for unconstrained optimization

10.11591/ijeecs.v17.i1.pp404-411
Basim Abbas Hassan , Hussein O. Dahawi , Azzam S. Younus
In this paper, a replacement new parameter conjugate gradient  for unconstrained optimization. The sufficient descent property cleave to. The global convergence property of the new method is proved under some assumptions. Numerical results explain that the  new parameter is superior  in practice. 
Volume: 17
Issue: 1
Page: 404-411
Publish at: 2020-01-01

Modeling with ontologies design patterns: credit scorecard as a case study

10.11591/ijeecs.v17.i1.pp429-439
Jalil Elhassouni , Abderrahim El Qadi , Mehdi Bazzi , Mohamed El Haziti
This paper proposes an ontological scorecard model for credit risk management. The purpose of credit scoring model is to reduce the possibility of potential losses with regard to issued loans. Loans are provided according to strict criteria which contain information about the client, loan structure, the purpose, repayment source and collateral. Several techniques have been used for credit risk assessment before granting a loan. Ontology design patterns is used here to enable the implementation of domain knowledge using the OWL rules and to improve the decision making process in credit monitoring. The modeling of our ontology will make the data publication simpler and graph structures intuitive, thus making its reusability and expandability easier.
Volume: 17
Issue: 1
Page: 429-439
Publish at: 2020-01-01

Requirements engineering for User-Centered school food ordering system

10.11591/ijeecs.v17.i1.pp357-364
Diyana Binti Halim Khoo , Afdallyna Fathiyah Harun , Saiful Izwan Suliman
Understanding user requirement for a technology design is central to user experience. A user-centered technology design should consider user needs and constraints as well as abide to the principles of HCI design heuristics. This paper describes the requirements gathering for Kantin Online System, a school food ordering system where we considered the needs and constraints of different stakeholders involved and elicit a compromise where the needs of all parties can be met. We then applied usability heuristics into the system design to facilitate perceived ease of use and perceived usefulness. We conclude this paper with experts’ evaluations towards the heuristic elements of the system design concept and possible future work.
Volume: 17
Issue: 1
Page: 357-364
Publish at: 2020-01-01

Power quality improvement using dynamic voltage restorer in electrical distribution system: an overview

10.11591/ijeecs.v17.i1.pp86-93
Ali Basim Mohammed , Mohd Aifaa Mohd Ariff , Sofia Najwa Ramli
This paper represents a review of the dynamic voltage restorer for power quality improvement in the electrical distribution system. Over the past 50 years, issues concerning power quality have steadily increased, to prevent the effect of the voltage disturbances, some of the devices are put as a solution to these problems such as distribution static compensator (D- STATCOM), solid-state transformer (SST), uninterruptible power supply (UPS), dynamic voltage restorer (DVR). The DVR is one of the economic solutions to overcome the voltage disturbances like voltage sag/swell and harmonics. It is widely used to mitigate the voltage disturbances in the power distribution system, especially in the medium and low distribution networks. This paper aims to review the implementation of the DVR in the system integrated with renewable energy resources. This is important because the future of electricity business is moving towards renewable energy and also provides a thorough discussion of the typical components, controllers, compensation methods, and the application of DVR. The extensive review of the technology aims to ease and speed up the development and the advancement of the DVR in the near future.
Volume: 17
Issue: 1
Page: 86-93
Publish at: 2020-01-01

Qualnet performances of grid-based clustering For WSN's routing protocols

10.11591/ijeecs.v17.i1.pp448-456
Nahidah Hussein Ismail , Basheer Yousif Mohsin
The wireless sensor networks (WSNs) believed to be as a hot research area due to their ranges in various fields of applications. Clustering is the more efficient techniques considered to resolve the problems of energy consumption in WSNs. The clustering has assured its effectiveness, specifically with high dynamic networks at which all nodes are represented in the clustering and all the data value can be collecting by sensor nodes with a cluster head (CH). The energy consumption as well as network traffic are balancing, the (CH) must be exchanged between all sensor nodes and the clustering size could be closely determined at various portions of the network. The key point at issue in WSN is to improve the energy-efficient algorithms with Grid based clustering for extending the lifetime of the networks, reducing cost, in addition to increasing the reliability of the network. The sensor nodes prepared with a power sources at limited period, so that the Grid Based Clustering algorithm (GBC) which efficiently employing sensor nodes energy have the ability to preserve an extended network lifetime. Sensor node Performances of the network mainly depend on the routing protocols, which are application based, four routing protocols LEACH, OLSR, AODV, and DSR in clustering WSN are estimated with Qualnet simulator. The results demonstrate that DSR outperforms in term of throughput, and end to end delay which compared to others while OLSR have highest value of half number of alive nodes per round.
Volume: 17
Issue: 1
Page: 448-456
Publish at: 2020-01-01

Optimization performance management with FCAPS and ITILv3: opportunities and obstacles

10.11591/ijeecs.v17.i1.pp281-290
Adityas Widjajarto , Muharman Lubis , M. K. Rizal Syahputra
With the need for rapidly growing network services each year; the factors of reliability, availability and quality become extremely critical for organizations, groups, institutions and governments to have in the network services implementation. In this case, several rural governments requires the improvement of its network performance management in establishing their internal and external operation to align with the grand design by the central government in improving citizen’s satisfaction through public service. Testing was done using scenarios for output analysis and packet loss as parameters. The results of the proposed topology obtained a productivity of 541.43 Kbps and a packet loss of 0.07%. While the current topology gets a rate of 421.28 Kbps and packet loss of 0.22%. It can be concluded that the proposed topology is still better than the current topology. The optimization of performance management is based on the FCAPS method which emphasize in the performance monitoring and data analysis with the support of ITILv3 that contains documentation and policy guidance to conduct quality performance management. In addition, performance management activities will occur with processes in the design of ITIL services and existing conditions.
Volume: 17
Issue: 1
Page: 281-290
Publish at: 2020-01-01

Design of PI-neural controller for hybrid active power filter

10.11591/ijeecs.v17.i1.pp18-26
Chau Minh Thuyen
This paper aims to design a control method using an adaptive controller for hybrid active power filter. The controller of designed method includes a traditional discrete proportional Integral controller and a neural regulator. The neural regulator is used to estimate the nonlinear model of Hybrid active power filter and predict an output value in the future to adjust the parameters of the traditional discrete proportional integral controller according to the change of load. Compared to the control method using a conventional Proportional Integral controller, the proposed controller shows the advantages of smaller compensation error and smaller total harmonic distortion and able to online control very well. The simulations have verified the effectiveness of proposed controller. 
Volume: 17
Issue: 1
Page: 18-26
Publish at: 2020-01-01

Liquefied petroleum gas monitoring and leakage detection system using nodemcu ESP8266 and wi-fi technology

10.11591/ijeecs.v17.i1.pp166-174
Suzi Seroja Binti Sarnin , Divine Senanu Ametefe , Nani Fadzlina Naim , Wan Norsyafizan Wan Mohamad , Norlela Ishak , Norfishah Ab Wahab , Norsuzila Ya’acob
Liquefied Petroleum Gas which is popularly known as LPG is a clean source of energy which is highly flammable and usually compressed into storage tanks. Due to the flammable nature of LPG it can easily lead to uncontrollable explosions in the presence of any ignition action or may lead to complete depletion of oxygen in a particular area. This study is focused on the fabrication of a system that would detect, monitor and control LPG gas leakages for domestic gas cylinders. A MQ-2 gas sensor was used for the detection of LPG gas leakages, the monitoring aspect was satisfied locally through notifications triggered by LEDs, piezo buzzer and remotely through the use of an application known as Blynk. The control aspect was implemented with the use of a stepper motor which turns off gas cylinder regulators whenever gas concentrations are high. All operations are primary hinged on the NodeMCU ESP8266 controller and Wi-Fi communication technology. 
Volume: 17
Issue: 1
Page: 166-174
Publish at: 2020-01-01

Energy consumption prediction through linear and non-linear baseline energy model

10.11591/ijeecs.v17.i1.pp102-109
Rijalul Fahmi Mustapa , NY Dahlan , Ihsan Mohd Yassin , Atiqah Hamizah Mohd Nordin , Azlee Zabidi
Accurate baseline energy models demand increase significantly as it lower the risk of energy savings quantification. It is achieved by performing energy consumption prediction with its respective independent variables through linear or non-linear modelling technique. Developing such model through linear modelling technique provide certain disadvantages due to the fact that the behavior of certain independent variables with respect to the energy consumption is non-linear in nature. Furthermore, linear modelling technique requires prior studies upon modelling to achieve accurate energy consumption prediction. Thus, to apprehend this situation, this paper main intention is to perform energy consumption prediction through a non-linear modelling technique to provide alternative option for developing a good and accurate baseline energy models. This study proposes energy consumption prediction based on Non-linear Auto Regressive with Exogenous Input – Artificial Neural Network (NARX-ANN) as a non-linear modelling technique that will be compared with Multiple Linear Regression Model (MLR) as linear modelling technique. A case study in Malaysian educational buildings during lecture week will be used for this purpose. The results demonstrate that NARX-ANN shows a higher accuracy through statistical error measurement.
Volume: 17
Issue: 1
Page: 102-109
Publish at: 2020-01-01

Performance comparison of multicast MANET CRN system’s based on POS scheme with different types of router protocol algorithms

10.11591/ijeecs.v17.i1.pp291-302
Basma Nazar Nadhim , Sarab Kamal Mahmood
A multi-layer multi-hop mechanism, with one of three different types of router protocol algorithms (Steiner minimal tree (SMT), shortest path tree (SPT) and minimal spanning tree (MST)) was employed for the construction of multi-cast MANET CRNs. The probability of success (POS) used as the channel assignment scheme, is dependent on the availability of the channel, and the required transmission time. It was applied to the network after the conversion of the network’s random topology into one of the three algorithms (SMT, SPT or MST). This facilitated the selection of an efficient channel for the transmission of the CR user’s data, under the effect of the Rayleigh fading channel. Three idle probability circumstances (i.e., =0.1, 0.5, 0.9), and different network parameters, were used to compare the  performance of the CRN with three routing protocols in terms of throughput, and packet delivery rate (PDR). According to the simulation results, for a high traffic load of PUs ( 1) at different network parameters , the CRN with the SPT algorithm performed better than the CRN with the SMT or MST algorithm. 
Volume: 17
Issue: 1
Page: 291-302
Publish at: 2020-01-01

Design and development of activity attendance monitoring system based on RFID

10.11591/ijeecs.v17.i1.pp500-507
Ray Adderley Jm Gining , S.S.M. Fauzi , I.M. Ayub , M.N.F. Jamaluddin , Ira Puspitasari , Okfalisa Okfalisa
Attending activities organized by the university or institution is one of the important criteria that must be fulfilled by students for multiple purposes. Whether it is by attending classes, or any other activities, the main concern is focused on the process of recording students’ attendance. The use of a paper-based manual system to record students’ attendance is still being widely used due to the lack of an e-management system. These approaches have a lot of disadvantages due to the nature of the paper which is a fragile material - also an expensive cost to procure and produce. This paper, relying on Radio Frequency Identification (RFID), designed and developed an electronic system known as Activity Attendance Monitoring System (AAMS) that utilizes readily available resource – student card, as the student identification when attending an activity. Results from the validation, execution and continuous test suggest that AAMS can be effectively implemented to monitor and record student’s attendance. The main contribution of the study is the design and development model that capable of monitoring students’ activity attendance in university activities context. Developers and researcher in the area can adopt the proposed design and development model in formulating a similar system in managing activity attendance.
Volume: 17
Issue: 1
Page: 500-507
Publish at: 2020-01-01

Electroencephalogram (EEG) stress analysis on alpha/beta ratio and theta/beta ratio

10.11591/ijeecs.v17.i1.pp175-182
Tee Yi Wen , Siti Armiza Mohd Aris
This paper presents an analysis of stress feature using the power ratio of frequency bands including Alpha to Beta and Theta to Beta. In this study, electroencephalography (EEG) acquisition tool was utilized to collect brain signals from 40 subjects and objectively reflected stress features induced by virtual reality (VR) technology. The EEG signals were analyzed using Welch’s fast Fourier transform (FFT) to extract power spectral density (PSD) features which represented the power of a signal distributed over a range of frequencies. Slow wave versus fast wave (SW/FW) of EEG has been studied to discriminate stress from resting baseline. The results showed the Alpha/Beta ratio and Theta/Beta ratio are negatively correlated with stress and indicated that the power ratios can discriminate the data characteristics of brainwaves for stress assessment.
Volume: 17
Issue: 1
Page: 175-182
Publish at: 2020-01-01
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