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29,734 Article Results

A Novel Optimization Algorithm Based on Stinging Behavior of Bee

10.11591/ijai.v7.i4.pp153-164
S. Jayalakshmi , R. Aswini
Optimization algorithms are search methods to find an optimal solution to a problem with a set of constraints. Bio-Inspired Algorithms (BIAs) are based on biological behavior to solve a real world problem. BIA with optimization technique is to improve the overall performance of BIA. The aim of this paper is to introduce a novel optimization algorithm which is inspired by natural stinging behavior of honey bee to find the optimal solution. This algorithm performs both monitor and sting if any occurrence of predators. By applying a novel optimization algorithm based on stinging behavior of bee, used to solve the intrusion detection problems. In this paper, a new host intrusion detection system based on novel optimization algorithm has been proposed and implemented. The performance of the proposed Anomaly-based Host Intrusion Detection System (A-HIDS) using a novel optimization algorithm based on stinging behavior of bee has been tested. In this paper, after an explanation of the natural stinging behavior of honey bee, a novel optimization algorithm and A-HIDS are described and implemented. The results show that the novel optimization algorithm offers some advantage according to the nature of the problem.
Volume: 7
Issue: 4
Page: 153-164
Publish at: 2018-12-01

Ant System and Weighted Voting Method for Multiple Classifier Systems

10.11591/ijece.v8i6.pp4705-4712
Abdullah Husin , Ku Ruhana Ku-Mahamud
Combining multiple classifiers is considered as a general solution for classification tasks. However, there are two problems in combining multiple classifiers: constructing a diverse classifier ensemble; and, constructing an appropriate combiner. In this study, an improved multiple classifier combination scheme is propose. A diverse classifier ensemble is constructed by training them with different feature set partitions. The ant system-based algorithm is used to form the optimal feature set partitions. Weighted voting is used to combine the classifiers’ outputs by considering the strength of the classifiers prior to voting. Experiments were carried out using k-NN ensembles on benchmark datasets from the University of California, Irvine, to evaluate the credibility of the proposed method. Experimental results showed that the proposed method has successfully constructed better k-NN ensembles. Further more the proposed method can be used to develop other multiple classifier systems.
Volume: 8
Issue: 6
Page: 4705-4712
Publish at: 2018-12-01

RS Codes for Downlink LTE System over LTE-MIMO Channel

10.12928/telkomnika.v16i6.9177
Ghasan Ali; Universiti Tun Hussein Onn Malaysia Hussain , Lukman; Universiti Tun Hussein Onn Malaysia Audah
Nowdays, different applications require a modern generation of mobile communication systems; long term evolution (LTE) is a candidate to achieve this purpose. One important challenge in wireless communications, including LTE systems, is the suitable techniques of controlling errors that degrade system performance in transmission systems over multipath fading channels. Different forward Error correction (FEC) techniqes are required to improve the robustness of transmission channels. In this paper, Reed-Solomon (RS) codes were used with a downlink LTE system over a LTE-MIMO channel. This research contributes by combining RS codes that have low decoding complexity (by using hard decision decoding) with a LTE-MIMO channel to improve downlink LTE system performance. The results show that using RS codes clearly improves LTE system performance and thus decreases Bit Error Rates (BER) more than convolutional and turbo codes which have high decoding complexity. Lastly, the results show also extra improvements of downlink LTE system performance by increasing the number of antennas of the LTE-MIMO channel.
Volume: 16
Issue: 6
Page: 2563-2569
Publish at: 2018-12-01

Inclined Image Recognition for Aerial Mapping using Deep Learning and Tree based Models

10.12928/telkomnika.v16i6.10157
Muhammad; Institut Teknologi Sepuluh Nopember Attamimi , Ronny; Institut Teknologi Sepuluh Nopember Mardiyanto , Astria Nur; Institut Teknologi Sepuluh Nopember Irfansyah
One of the important capabilities of an unmanned aerial vehicle (UAV) is aerial mapping. Aerial mapping is an image registration problem, i.e., the problem of transforming different sets of images into one coordinate system. In image registration, the quality of the output is strongly influenced by the quality of input (i.e., images captured by the UAV). Therefore, selecting the quality of input images becomes important and one of the challenging task in aerial mapping because the ground truth in the mapping process is not given before the UAV flies. Typically, UAV takes images in sequence irrespective of its flight orientation and roll angle. These may result in the acquisition of bad quality images, possibly compromising the quality of mapping results, and increasing the computational cost of a registration process. To address these issues, we need a recognition system that is able to recognize images that are not suitable for the registration process. In this paper, we define these unsuitable images as “inclined images,” i.e., images captured by UAV that are not perpendicular to the ground. Although we can calculate the inclination angle using a gyroscope attached to the UAV, our interest here is to recognize these inclined images without the use of additional sensors in order to mimic how humans perform this task visually. To realize that, we utilize a deep learning method with the combination of tree-based models to build an inclined image recognition system. We have validated the proposed system with the images captured by the UAV. We collected 192 images and labelled them with two different levels of classes (i.e., coarse- and fine-classification). We compared this with several models and the results showed that our proposed system yielded an improvement of accuracy rate up to 3%.
Volume: 16
Issue: 6
Page: 3034-3044
Publish at: 2018-12-01

Comparison of Multiscale Entropy for Lung Sound Classification

10.11591/ijeecs.v12.i3.pp984-994
Achmad Rizal , Risanuri Hidayat , Hanung Adi Nugroho
Lung sound is a biological signal that can be used to determine the health level of the respiratory tract. Various digital signal processing techniques have been developed for automatic classification of lung sounds. Entropy is one of the parameters used to measure the biomedical signal complexity. Multiscale entropy is introduced to measure the entropy of a signal at a particular scale range. Over time, various multiscale entropy techniques have been proposed to measure the complexity of biological signals and other physical signals. In this paper, some multiscale entropy techniques for lung sound classification are compared. The result of the comparison indicates that the Multiscale Permutation Entropy (MPE) produces the highest accuracy of 97.98% for five lung sound datasets. The result was achieved for the scale 1-10 producing ten features for each lung sound data. This result is better than other seven entropies. Multiscale entropy analysis can improve the accuracy of lung sound classification without requiring any features other than entropy.
Volume: 12
Issue: 3
Page: 984-994
Publish at: 2018-12-01

Fuzzy Rule-based Classification Systems for the Gender Prediction from Handwriting

10.12928/telkomnika.v16i6.9478
Lala Septem; Universitas Pendidikan Indonesia Riza , Aldi; Universitas Pendidikan Indonesia Zainafif , Rasim; Universitas Pendidikan Indonesia Rasim , Shah; University of Swabi Nazir
The handwriting is an object that can describe information about the author implicitly. For example, it is able to predict the gender. Recently, the gender prediction based on handwriting becomes an interesting research. Even in 2013, an competition for prediction gender from handwriting has been held by Kaggle. However, the accuracies of current approaches are relatively low. So, in this study, we attempt to implement Fuzzy Rule-Based Classification Systems (FRBCSs) for gender predictions from handwriting. Three stages are conducted to achieve the objective, as follows: defining some features based on Graphology Techniques (e.g., pressure, height, and margin on writing), collecting real datasets, processing on digital images (i.e., image segmentation, projection profiles, and margin calculation, etc.), and implementing FRBCSs. The implemented algorithm based on FRBCSs in this research is Chi’s Algorithm, which is a method based on Fuzzy Logic for classification tasks. Moreover, some experiments and analysis, involving 75 respondents consisting of 36 males and 39 females, have been done to validate the proposed model. From the simulations, the classification rate obtained is 76%. Besides improving the accuracy rate, the proposed model can provide an understandable model by utilizing fuzzy rule-based systems.
Volume: 16
Issue: 6
Page: 2725-2732
Publish at: 2018-12-01

Agriculture Data Analytics in Crop Yield Estimation: A Critical Review

10.11591/ijeecs.v12.i3.pp1087-1093
B.M. Sagar , Cauvery N K
Agriculture is important for human survival because it serves the basic need. A well-known fact that the majority of population (≥55%) in India is into agriculture. Due to variations in climatic conditions, there exist bottlenecks for increasing the crop production in India. It has become challenging task to achieve desired targets in Agri based crop yield. Factors like climate, geographical conditions, economic and political conditions are to be considered which have direct impact on the production, productivity of the crops. Crop yield prediction is one of the important factors in agriculture practices. Farmers need information regarding crop yield before sowing seeds in their fields to achieve enhanced crop yield. The use of technology in agriculture has increased in recent year and data analytics is one such trend that has penetrated into the agriculture field being used for management of crop yield and monitoring crop health. The recent trends in the domain of agriculture have made the people to understand the significance of          Big data. The main challenge using big data in agriculture is identification of impact and effectiveness of big data analytics.  Efforts are going on to understand how big data analytics can be used to improve the productivity in agricultural practices. The analysis of data related to agriculture helps in crop yield prediction, crop health monitoring and other such related activities. In literature, there exist several studies related to the use of data analytics in the agriculture domain. The present study gives insights on various data analytics methods applied to crop yield prediction. The work also signifies the important lacunae points’ in the proposed area of research.
Volume: 12
Issue: 3
Page: 1087-1093
Publish at: 2018-12-01

A Small RLSA Antenna Utilizing the Specification of Back Fires 17 dBi LAN Antennas

10.12928/telkomnika.v16i6.10414
Teddy; Universitas Islam Negeri Sultan Syarif Kasim Purnamirza , Prayoga; Universitas Islam Negeri Sultan Syarif Kasim Budikesuma , Imran M. Bin; Universiti Teknikal Malaysia Malaka Ibrahim , Depriwana; Universitas Islam Negeri Sultan Syarif Kasim Rahmi , Rika; Universitas Islam Negeri Sultan Syarif Kasim Susanti
This research developed a small RLSA antenna that mimics the specification of a Wi-Fi antenna that is available in markets, which is a Back Fires 17 dBi LAN antenna. This research used the size of the back fires antenna as the size for the RLSA antenna. Base on this size, we designed and simulated 71 RLSA antenna models. Among them, we chose a best model and fabricated its prototype. We measured the prototype and found that the measurement result fits the simulation result, thus verifying the correctness of the antenna model. Furthermore, we analysed that with the same size, our RLSA antenna has better performance compared to the back fires antenna, in term of gain (0,53 dB higher), and in term of bandwidth (1075 MHz wider). We also found that our RLSA antenna is lighter and thinner compared to the back fires antenna. We also test the RLSA antenna in real condition for indoor and outdoor communication link. The test showed that the RLSA antenna can performs properly.
Volume: 16
Issue: 6
Page: 2871-2878
Publish at: 2018-12-01

PID Control Design for Biofuel Furnace using Arduino

10.12928/telkomnika.v16i6.9770
Agus; Adhi Tama Institute of Technology Budianto , Wahyu S.; Adhi Tama Institute of Technology Pambudi , Sumari; State University of Malang Sumari , Andik; Batam International University Yulianto
The target of the Indonesian government in 2025 is increasing the use of renewable energy up to 23%, one part of potential renewable energy in Indonesia is biofuel. Biofuel requires raw materials of plant or animal oil with or without catalyst, it does not require the raw material of ethanol or methanol. The product is similar to gasoline and diesel that came from crude oil. Potential oil-producing plants in Indonesia are Palm Oil and Nyamplung (Calophyllum inophyllum L.). The process of making biofuel from this material is done by heating the reactor or furnace with temperature range of 350° C - 500° C. To reach the stability of furnace temperature, it requires temperature control systems and one of them is PID. Arduino microcontroller is an open source and user friendly platform for hardware and software. The control system that designed by using arduino is capable to control the furnace temperature from 200° C to 400° C and it is using a 6000 watt heater. The best system response is achieved when Kp = 15, Ki = 15 and Kd = 1. With these parameter values, the system has the lowest overshoot response of 16%, so it is safe for biofuel furnace, even though the rise time value is 146 s, settling time of 429 and steady state error is equal to 2.87%.
Volume: 16
Issue: 6
Page: 3016-3023
Publish at: 2018-12-01

Sub-1 GHz Wireless Nodes Performance Evaluation for Intelligent Greenhouse System

10.12928/telkomnika.v16i6.11556
I Nyoman Kusuma; Politeknik Negeri Bali Wardana , Ngakan Nyoman Kutha; Universitas Pendidikan Nasional Krisnawijaya , I Wayan Aditya; Universitas Pendidikan Ganesha Suranata
Greenhouses provide not only solution to problems faced by conventional farming systems but also play an important role to improve the energy efficiency and environmentally friendly awareness. To achieve benefits of greenhouse farming system in terms of energy efficiency, research related to this issue have been done by many researchers. However, resources that concern on how to practically implement the particular energy-saving technology for greenhouses need to be improved. In this research, field experiment results related to low-power communication between nodes have been reported by implementing universal prototype modules. The pros and cons of existing communication technology, the proposed architecture of network and module analysis, and the performance evaluation of the proposed module dedicated to intelligent greenhouse farming system were also discussed.
Volume: 16
Issue: 6
Page: 2888-2895
Publish at: 2018-12-01

Solar Panel Control System Using an Intelligent Control: T2FSMC and Firefly Algorithm

10.12928/telkomnika.v16i6.8694
Mardlijah; Institut Teknologi Sepuluh Nopember (ITS) Mardlijah , Zainullah; Institut Teknologi Sepuluh Nopember (ITS) Zuhri
Solar panel is a solar energy converter to electrical energy. On solar tracker, there is a controller which sets the movement of solar panel such that it is perpendicular with solar rays. Previous research had designed Type 2 Fuzzy Sliding Mode Control (T2FSMC) controller to control the position of solar panel. However, there was trial and error process to determine gain scale factor so the development of optimization method is needed. This paper aims to modify gain scale factor using Firefly algorithm to increase performance of system. The simulation shows that T2FSMC Firefly has better performance than T2FSMC. T2FSMC Firefly shows the increase of performance on rise time, settling time, and integral time absolute error.
Volume: 16
Issue: 6
Page: 2988-2998
Publish at: 2018-12-01

Comparison of Raindrop Size Distribution Characteristics Across the Southeast Asia Region

10.12928/telkomnika.v16i6.10091
Manhal; Universiti Teknologi Malaysia Alhilali , Lam Hong; Universiti Tun Hussein Onn Malaysia Yin , Jafri; Universiti Teknologi Malaysia Din
Satellite communication requires reliable estimates of the channel characteristics, especially with the future use of higher frequencies. Regardless of the rain rate, the shape of rain drop size distribution (DSD) start to considerably effect the specific attenuation. In this study DSDs are studied using ground-based two-dimensional video disdrometer measurements taken from Johor, Malaysia as well as two similar datasets from Gan and Manus, two equatorial islands. Integral rain parameters are studied to explain DSD variations across the Southeast Asia region. Slightly higher raindrop concentrations and larger diameters were observed in Johor than in Gan or Manus, which is due to Johor being affected by not only oceanic rain- fall but land rainfall as well. The measured rainfall was classified into convective and stratiform precipitation types; the results showed that the Southeast Asia region is dominated by convective rain in terms of accumulated rainfall amount, but stratiform rain occurred more frequently. Further, seasonal variations observed in Johor were insignificant and the DSD variation was mostly due to changes in percentage occurrence of the precipitation types for each monsoon season.
Volume: 16
Issue: 6
Page: 2522-2527
Publish at: 2018-12-01

A SoC-IP Core Test Data Compression Scheme based on Error Correcting Hamming Codes

10.11591/ijeecs.v12.i3.pp933-940
Sanjoy Mitra , Debaprasad Das
As system-on-chip (SoC) integration is growing very rapidly, increased circuit densities in SoC have lead a radical increase in test data volume and reduction of this large test data volume is one of the biggest challenges in the testing industry. This paper presents an efficient test independent compression scheme primarily based on the error correcting Hamming codes. The scheme operates on the pre-computed test data without the need of structural information of the circuit under test and thus it is applicable for IP cores in SoC. Test vectors are equally sliced into the size of ‘n’ bits. Individual slices are treated as a Hamming codeword consisting of ‘p’ parity bits and ‘d’ data bits (n = d + p) and validity of each codeword is verified. If a valid slice is encountered’ data bits prefixed by ‘1’ are written to the compressed file, while for a non-valid slice all ‘n’ bits preceded by ‘0’ are written to the compressed file. Finally, we apply Huffman coding and RLE in order to improve the compression ratio further The efficiency of the proposed hybrid scheme is verified with the experimental outcomes and comparisons to existing compression methods suitable for testing of IP cores.
Volume: 12
Issue: 3
Page: 933-940
Publish at: 2018-12-01

A Two-stages Microstrip Power Amplifier for WiMAX Applications

10.12928/telkomnika.v16i6.9338
Amine; Settat Hassan 1st University Settat Rachakh , Larbi El; Settat Hassan 1st University Settat Abdellaoui , Jamal; Settat Hassan 1st University Settat Zbitou , Ahmed; Settat Hassan 1st University Settat Errkik , Abdelali; Settat Hassan 1st University Settat Tajmouati , Mohamed; Microwave group ESEO Angers Latrach
Amplification is one of the most basic and prevalent microwave analog circuit functions. Wherefore power amplifiers are the most important parts of electronic circuits. This is why the designing of power amplifiers is crucial in analog circuit designing. The intent of this work is to present an analysis and design of a microwave broadband power amplifier by using two stages topology. A two stages power amplifier using a distributed matching network for WiMAX applications is based on ATF-21170 (GaAs FET). The configuration aims to achieve high power gain amplifier with low return loss over a broad bandwidth. The proposed BPA is designed with a planar structure on an epoxy (FR4) substrate. The planar structure is also utilized for getting the good matching condition. The advanced design system (ADS) software is used for design, simulation, and optimization the proposed amplifier. The complete amplifier achieves an excellent power gain; is changed between 28.5 and 20dB with an output power of 12.45dBm at 1dB compression point. For the input reflection coefficient (S11) is varied between -20 and -42dB. While the output reflection coefficient (S22) is varied between -10 and - 49dB over the wide frequency band of 3.2-3.8GHz.
Volume: 16
Issue: 6
Page: 2500-2506
Publish at: 2018-12-01

Image Analysis using Color Co-occurrence Matrix Textural Features for Predicting Nitrogen Content in Spinach

10.12928/telkomnika.v16i6.10326
Yusuf; Universitas Brawijaya Hendrawan , Indah Mustika; Universitas Brawijaya Sakti , Yusuf; Universitas Brawijaya Wibisono , Muchnuria; Universitas Brawijaya Rachmawati , Sandra Malin; Universitas Brawijaya Sutan
This study aimed to determine the nitrogen content of spinach leaves by using computer imaging technology. The application of Color Co-occurrence Matrix (CCM) texture analysis was used to recognize the pattern of nitrogen content in spinach leaves. The texture analysis consisted of 40 CCM textural features constructed from RGB and grey colors. From the 40 textural features, the best features-subset was selected by using features selection method. Features selection method can increase the accuracy of image analysis using ANN model to predict nitrogen content of spinach leaves. The combination of ANN with Ant Colony Optimization resulted in the most optimal modelling with mean square error validation value of 0.0000083 and the R2 testing-set data = 0.99 by using 10 CCM textural features as the input of ANN. The computer vision method using ANN model which has been developed can be used as non-invasive sensing device to predict nitrogen content of spinach and for guiding farmers in the accurate application of their nitrogen fertilization strategies using low cost computer imaging technology.
Volume: 16
Issue: 6
Page: 2712-2724
Publish at: 2018-12-01
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