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29,922 Article Results

ELM and K-nn machine learning in classification of breath sounds signals

10.11591/ijece.v10i4.pp3528-3536
Z. Neili , M. Fezari , A. Redjati
The acquisition of Breath sounds (BS) signals from a human respiratory system with an electronic stethoscope, provide and offer prominent information which helps the doctors to diagnosis and classification of pulmonary diseases. Unfortunately, this BS signals with other biological signals have a non-stationary nature according to the variation of the lung volume, and this nature makes it difficult to analyze and classify between several diseases. In this study, we were focused on comparing the ability of the extreme learning machine (ELM) and k-nearest neighbour (K-nn) machine learning algorithms in the classification of adventitious and normal breath sounds. To do so, the empirical mode decomposition (EMD) was used in this work to analyze BS, this method is rarely used in the breath sounds analysis. After the EMD decomposition of the signals into Intrinsic Mode Functions (IMFs), the Hjorth descriptors (Activity) and Permutation Entropy (PE) features were extracted from each IMFs and combined for classification stage. The study has found that the combination of features (activity and PE) yielded an accuracy of 90.71%, 95% using ELM and K-nn respectively in binary classification (normal and abnormal breath sounds), and 83.57%, 86.42% in multiclass classification (five classes).
Volume: 10
Issue: 4
Page: 3528-3536
Publish at: 2020-08-01

Hybrid branch prediction for pipelined MIPS processor

10.11591/ijece.v10i4.pp3476-3482
Ali S. Al-Khalid , Safaa S. Omran
In the modern microprocessors that designed with pipeline stages, the performance of these types of processors will be affected when executing branch instructions, because in this case there will be stalls in the pipeline. In turn this causes in reducing the Cycle Per Instruction (CPI) of the processor. In the case of executing a branch instruction, the processor needs an extra clocks to know if that branch will happen (Taken) or not (Not Taken) and also it requires calculating the new address in the case of the branch is Taken. The prediction that the branch is T / NT is an important stage in enhancing the processor performance. In this research more than one method of branch prediction (hybrid) is used and the designed circuit will choose different types of prediction algoritms depending on the type of the branch. Some of these methods were used are static while the other are dynamic. All circuits were built practically and examined by applying different programs on the designed predictor algorithm to compute the performance of the processor.
Volume: 10
Issue: 4
Page: 3476-3482
Publish at: 2020-08-01

An efficient and optimized tracking framework through optimizing algorithm in a deep forest using NFC

10.11591/ijeecs.v19.i2.pp884-889
Md. Abbas Ali Khan , Mohammad Hanif Ali , A.K.M Fazlul Haque , Chandan Debnath , Shohag Kumar Bhowmik
NFC is applying in various field of contemporary technology. Especially of convenience tag usability in any place. One of the facilities which can be added in the tracking system is the implementation of Near Field Communication in order to guide each tourist in the deep forest or any other location. In the deep forest, tracking or location detection activities need to be done efficiently, like desired path finding in a deep forest. At present, the tracking procedure in deep forest is working with the help of guides or local citizens. Currently, in any restricted area such as the “Sundarban” forest, no outside general people are allowed to travel in the jungle without any authorized guide which is not an efficient way to travel smoothly. The use of Near Field Communication can solve the problem related to lost the way, safety, and easily help the travelers to track the desired destination without the help of human resources or any guide. The NFC tags that hold mapping information of the area, in the point of tag setup all tags will be set up on several trees along with sequence.
Volume: 19
Issue: 2
Page: 884-889
Publish at: 2020-08-01

Loss allocation in distribution networks with distributed generators undergoing network reconfiguration

10.11591/ijece.v10i4.pp3375-3383
Ambika Prasad Hota , Sivkumar Mishra
In this paper, a branch exchange based heuristic network reconfiguration method is proposed for obtaining an optimal network in a deregulated power system. A unique bus identification scheme is employed which makes the load flow and loss calculation faster due to its reduced search time under varying network topological environment. The proposed power loss allocation technique eliminates the effect of cross-term analytically from the loss formulation without any assumptions and approximations. The effectiveness of the proposed reconfiguration and loss allocation methods are investigated by comparing the results obtained by the present approach with that of the existing “Quadratic method” using a 33-bus radial distribution system with/without DGs.
Volume: 10
Issue: 4
Page: 3375-3383
Publish at: 2020-08-01

Local feature extraction based facial emotion recognition: a survey

10.11591/ijece.v10i4.pp4080-4092
Khadija Slimani , Mohamed Kas , Youssef El Merabet , Yassine Ruichek , Rochdi Messoussi
Notwithstanding the recent technological advancement, the identification of facial and emotional expressions is still one of the greatest challenges scientists have ever faced. Generally, the human face is identified as a composition made up of textures arranged in micro-patterns. Currently, there has been a tremendous increase in the use of local binary pattern based texture algorithms which have invariably been identified to being essential in the completion of a variety of tasks and in the extraction of essential attributes from an image. Over the years, lots of LBP variants have been literally reviewed. However, what is left is a thorough and comprehensive analysis of their independent performance. This research work aims at filling this gap by performing a large-scale performance evaluation of 46 recent state-of-the-art LBP variants for facial expression recognition. Extensive experimental results on the well-known challenging and benchmark KDEF, JAFFE, CK and MUG databases taken under different facial expression conditions, indicate that a number of evaluated state-of-the-art LBP-like methods achieve promising results, which are better or competitive than several recent state-of-the-art facial recognition systems. Recognition rates of 100%, 98.57%, 95.92% and 100% have been reached for CK, JAFFE, KDEF and MUG databases, respectively.
Volume: 10
Issue: 4
Page: 4080-4092
Publish at: 2020-08-01

Dynamic routing discovery scheme for high mobility in mobile ad hoc wireless networks

10.11591/ijece.v10i4.pp3702-3714
Haider Alani , Maha Abdelhaq , Raed Alsaqour
An innovative technology that is widely used in many applications is the Mobile Ad-hoc Network (MANET). Discovery and maintenance of routes at MANET are important issues. Within MANET, broadcasting is used to discover a path within on-demand routing protocols. Establishing and maintaining a route periodically among the nodes is the challenge that requires the transmitting of control packets across a network. This state leads to the issue of broadcasting storms. Broadcasting control packets increase control packets overhead and decrease network performance. In this paper, we proposed a scheme called AODV-Velocity and Dynamic (AODV-VD) for effective broadcast control packets. The routing protocol for the ad-hoc on-demand distance victor (AODV) is used to implement the proposed AODV-VD scheme. AODV-VD scheme reduces both the excessive route discovery control packets and network overhead. Network simulator version 2.35 (NS2.35) was used to compare the proposed AODV-VD scheme to the AODV routing protocol in terms of end-to-end latency, average throughput, packet transmission ratio and overhead ratio.
Volume: 10
Issue: 4
Page: 3702-3714
Publish at: 2020-08-01

Electromagnetic pollution maps as a resource for assessing the risk of emissions from mobile communications antennas

10.11591/ijece.v10i4.pp4244-4251
Yeison Alberto Garces-Gomez , Vladimir Henao-Cespedes , Luis Fernando Diaz-Cadavid
Electromagnetic pollution has taken on importance in recent decades, as interest is growing in knowing how the proliferation of mobile communication devices can affect the environment and generate health problems in the population. In this document, a systematic review of the methodologies for measuring electromagnetic radiation is carried out with a view to generating pollution profiles. It also develops a novel methodology for measuring electromagnetic pollution (EMP) in urban areas, and is validated with a case study using a map of EMP in the city of Manizales (Colombia), determining the spatial distribution of radiation levels. In order to generate the map, EMP measurements were carried out in the bands of local mobile telephone operators, in addition to the LPWAN (low power wide area network) LoRaWAN and Sigfox networks, Wi-Fi, and those related to IoT technologies.
Volume: 10
Issue: 4
Page: 4244-4251
Publish at: 2020-08-01

Dynamic assessment effect on speaking performance of Indonesian EFL learners

10.11591/ijere.v9i3.20466
Fahmi Fahmi , Bambang Widi Pratolo , Nurul Amalia Zahruni
The research concerned the application of Dynamic Assessment (DA) in English Language Teaching (ELT) which based on Vygotsky’s theory, namely Zone of Proximal Development (ZPD). The research was meant to investigate the effect of DA in improving teaching and learning speaking in Indonesia especially English as a Foreign Language (EFL) learners in university. The research was conducted using a qualitative method by involving four Indonesian university learners in the first semester. The participants received the same treatments through pre-test and self-reflection, feedback and knowledge expansion, post-test and self-reflection, post-feedback, and semi-structured interviews. The instruments were used to analyze the learners’ non-fluency and mastery problem. The analysis showed that the learners’ speaking performance was improved after experiencing DA sessions. The results of the test and self-reflection showed significant improvement in their speaking. The finding showed some positive effects of DA on EFL learners’ speaking performance. In interviews, learners showed positive experiences and attitude toward DA since it served them a comfortable, structured, practical, and meaningful platform to recognize their speaking behavior, weaknesses, strength, and needs. Furthermore, it also helped them to get the objective feedbacks with less anxiety. The researchers conclude that DA can be applied as a primary alternative assessment in English speaking practices.
Volume: 9
Issue: 3
Page: 778-790
Publish at: 2020-08-01

DC performance analysis of a 20nm gate lenght n-type silicon GAA junctionless (Si JL-GAA) transistor

10.11591/ijece.v10i4.pp4043-4052
Faiza Merad , Ahlam Guen-Bouazza
With integrated circuit scales in the 22-nm regime, conventional planar MOSFETs have approached the limit of their potential performance. To overcome short channel effects 'SCEs' that appears for deeply scaled MOSFETs beyond 10nm technology node many new device structures and channel materials have been proposed. Among these devices such as Gate-all-around FET. Recentely, junctionless GAA MOSFETs JL-GAA MOSFETs have attracted much attention since the junctionless MOSFET has been presented. In this paper, DC characteristics of an n-type JL-GAA MOSFET are presented using a 3-D quantum transport model .This new generation device is conceived with the same doping concentration level in its channel source/drain allowing to reduce fabrication complexity . The performance of our 3D JL-GAA structure with a 20nm gate length and a rectangular cross section have been obtained using SILVACO TCAD tools allowing also to study short channel effects. Our device reveals a favorable on/off current ratio and better SCE characteristics compared to an inversion-mode GAA transistor. Our device reveals a threshold voltage of 0.55 V, a sub-threshold slope of 63mV / decade which approaches the ideal value, an Ion / Ioff ratio of 10e + 10 value and a drain induced barrier lowring (DIBL) value of 98mV / V.
Volume: 10
Issue: 4
Page: 4043-4052
Publish at: 2020-08-01

The effect of recovery satisfaction on citizens loyalty perception: a case study of mobile government services

10.11591/ijece.v10i4.pp4279-4295
Ibrahim Almarashdeh
Use of mobile services is an integral part of today’s life. Organizations, government agencies as well as service providers in the market employ mobile services or application in reaching their citizens or users worldwide. Notably, service failure issues might frustrate users in using mobile service, but usually, service providers would employ the strategy of recovery as solution. Recovery strategy aims to sustain the relationship with users following service failure. Somehow, the factors that might impact recovery process are unclear. It is also unclear if users will use the service again following the completion of recovery process. Hence, in this study, a survey on 743 adults was carried out, and the data were analyzed using SEM to determine the factors that impact users’ recovery satisfaction the most and the impact of recovery satisfaction on citizens loyalty to use mobile government in the future. The finding of this study illustrated that expect of self-efficacy, all factors proposed in the research model found to has a significant impact on recovery satisfaction. Among all the supported hypothesis, the highest impact on recovery satisfaction comes from perceived trust in government as the initial predictor to use the service
Volume: 10
Issue: 4
Page: 4279-4295
Publish at: 2020-08-01

Enhancement of power quality using microprocessor based shunt active power filter for unbalanced load

10.11591/ijece.v10i4.pp3393-3402
Madhu B. R. , Dinesh M. N. , Tsewang Thinlas , Deril Menezes
Power quality is the most significant factor of power sector. The end user equipment such as induction motor, inverters, rectifiers inject harmonics into power system that influences the quality of power delivered. The presence of harmonics forces the use of instantaneous reactive power theory to calculate instantaneous power that helps in finding the compensating currents to eliminate harmonics. The control action required by active filter is accomplished by STM32F303RET6 microcontroller. Single phase induction motor is used as a dynamic nonlinear load in one of the three phases and resistive loads on the other two phases. TRIAC based RC triggering circuit was used to control the single phase induction motor. This paper presents the simulation and hardware implementation of shunt active power filter for 3 phase 4 wire unbalanced system. The hardware results show that THD in the source side has been reduced from 50.7% to 9.6% by implementing the SAPF.
Volume: 10
Issue: 4
Page: 3393-3402
Publish at: 2020-08-01

The role of entrepreneurial intention in predicting vocational high school students’ employability

10.11591/ijere.v9i3.20580
Fatwa Tentama , Sabrina Yusantri
One of the factors that contribute to the level of employability is entrepreneurial intention. This study discusses the role of entrepreneurial intentions on students' employability. The population in this study was all students of grade XII of Vocational High School Koperasi Yogyakarta, Indonesia, consisting of 141 students. The sample in this study was 86 students. The sample selection was done by randomizing using a cluster random sampling technique. Methods of data collection used in this study are scales, employability scale, and entrepreneurial intentions scale. Analysis of the data used in this study is the product-moment analysis technique. The results of data analysis showed the correlation between entrepreneurial intentions and employability where r = 0.339 with p = 0.001 (p < 0.01), which showed a very significant positive correlation between the two variables at the research site. It means that the level of employability can be predicted based on entrepreneurial intention. The entrepreneurial intention contributed 11.5% to employability, and the remaining 88.5% can be influenced by other variables.
Volume: 9
Issue: 3
Page: 558-563
Publish at: 2020-08-01

Performance evaluation of Map-reduce jar pig hive and spark with machine learning using big data

10.11591/ijece.v10i4.pp3811-3818
Santosh Jankatti , Raghavendra B. K. , Raghavendra S. , Meenakshi Meenakshi
Big data is the biggest challenges as we need huge processing power system and good algorithms to make an decision. We need Hadoop environment with pig hive, machine learning and hadoopecosystem components. The data comes from industries. Many devices around us and sensor, and from social media sites. According to McKinsey There will be a shortage of 15000000 big data professionals by the end of 2020. There are lots of technologies to solve the problem of big data Storage and processing. Such technologies are Apache Hadoop, Apache Spark, Apache Kafka, and many more. Here we analyse the processing speed for the 4GB data on cloudx lab with Hadoop mapreduce with varing mappers and reducers and with pig script and Hive querries and spark environment along with machine learning technology and from the results we can say that machine learning with Hadoop will enhance the processing performance along with with spark, and also we can say that spark is better than Hadoop mapreduce pig and hive, spark with hive and machine learning will be the best performance enhanced compared with pig and hive, Hadoop mapreduce jar.
Volume: 10
Issue: 4
Page: 3811-3818
Publish at: 2020-08-01

Random forest application on cognitive level classification of E-learning content

10.11591/ijece.v10i4.pp4372-4380
Benny Thomas , Chandra J.
The e-learning is the primary method of learning for most learners after the regular academics studies. The knowledge delivery through e-learning technologies increased exponentially over the years because of the advancement in internet and e-learning technologies. Knowledge delivery to some people would never have been possible without the e-learning technologies. Most of the working professional do focused studies for carrier advancement, promotion or to improve the domain knowledge. These learner can find many free e-learning web sites from the internet easily in the domain of interest. However it is quite difficult to find the best e-learning content suitable for their learning based on their domain knowledge level. User spent most of the time figuring out the right content from a plethora of available content and end up learning nothing. An intelligent framework using machine learning algorithms with Random Forest Classifier is proposed to address this issue, which classifies the e-learning content based on its difficulty levels and provide the learner the best content suitable based on the knowledge level .The frame work is trained with the data set collected from multiple popular e-learning web sites. The model is tested with real time e-learning web sites links and found that the e-contents in the web sites are recommended to the user based on its difficulty levels as beginner level, intermediate level and advanced level.
Volume: 10
Issue: 4
Page: 4372-4380
Publish at: 2020-08-01

Formalization of SOA concepts with mathematical foundation

10.11591/ijece.v10i4.pp3883-3888
Asha H. V. , Shantharam Nayak , Annamma Abraham
With the development of the IT industry, agility and dynamicity are the two expected characteristics from any business enterprise. Service oriented architecture (SOA) is emerging as a promising approach aiming to address the current trends/needs of enterprise business applications. The current work aims at giving an overview of the conceptual model of SOA based on set theory approach. Also, it posits mathematical definitions for service, logical service, environment service and application definition with the help of general systems theory and mathematical foundation. With the help of mathematical model, the definition and functionality of services enhances SOA principles which can be used efficiently in integrating heterogeneous components.
Volume: 10
Issue: 4
Page: 3883-3888
Publish at: 2020-08-01
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