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                <text>TELKOMNIKA Telecommunication, Computing, Electronics and Control &#13;
On the dynamic behavior of the current in the condenser of a boost converter controlled with ZAD </text>
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                <text>Boost converter, Flip bifurcation, Neimar-Sacker bifurcation, Nonlinearity, ZAD control technique</text>
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                <text>In this paper, an analytical and numerical study is conducted on the dynamics of the current in the condenser of a boost converter controlled with ZAD, using a pulse PWM to the symmetric center. A stability analysis of periodic 1T-orbits was made by the analytical calculation of the eigenvalues of the Jacobian matrix of the dynamic system, where the presence of flip and Neimar–Sacker-type bifurcations was determined. The presence of chaos, which is controlled by ZAD and FPIC techniques, is shown from the analysis of Lyapunov exponents. </text>
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                <text>Dario Del Cristo Vergara Perez, Simeon Casanova Trujillo, and Fredy E. Hoyos Velasco</text>
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                <text>DOI: 10.12928/TELKOMNIKA.v18i3.14109</text>
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                <text>Universitas Ahmad Dahlan</text>
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                <text>Sri Wahyuni</text>
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                <text>ISSN: 1693-6930</text>
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The impact of noise on detecting the arrival angle using the root-WSF algorithm </text>
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                <text>DOA estimation, Root-WSF algorithm, Smart antenna system, Wi-Fi, WI-Gig</text>
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                <text>This article discusses three standards of Wi-Fi: traditional, current and&#13;
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                <text>Btissam Boustani, Abdennaceur Baghdad, Aicha Sahel, Abdelhakim Ballouk, Abdelmajid Badri</text>
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                <text>DOI: 10.12928/TELKOMNIKA.v18i3.14055</text>
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                <text>Sri Wahyuni</text>
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                <text>TELKOMNIKA Telecommunication, Computing, Electronics and Control &#13;
Smart agriculture management system using internet of things</text>
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                <text>Internet of things (IoT), Management system, Smart agriculture</text>
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                <text>In the world of digital era, an advance development with internet of things (IoT) were initiated, where devices communicate with each other and the process are automated and controlled with the help of internet. An IoT in an agriculture framework includes various benefits in managing and monitoring the crops. In this paper, an architectural framework is developed which integrates the internet of things (IoT) with the production of crops, different measures and methods are used to monitor crops using cloud computing. The approach provides real-time analysis of data collected from sensors placed in crops and produces result to farmer which is necessary for the monitoring the crop growth which reduces the time, energy of the farmer. The data collected from the fields are stored in the cloud and processed in order to facilitate automation by integrating IoT devices. The concept presented in the paper could increase the productivity of the crops by reducing wastage of resources utilized in the agriculture fields. The results of the experimentation carried out presents the details of temperature, soil moisture, humidity and water usage for the field and performs decision&#13;
making analysis with the interaction of the farmer. </text>
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                <text>Kaushik Sekaran, Maytham N. Meqdad, Pardeep Kumar, Soundar Rajan, Seifedine Kadry</text>
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                <text>DOI: 10.12928/TELKOMNIKA.v18i3.14029</text>
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                <text>Universitas Ahmad Dahlan</text>
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                <text>Sri Wahyuni</text>
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                <text>ISSN: 1693-6930</text>
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                  <text>VOL. 18, NO. 3 2020</text>
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                <text>TELKOMNIKA Telecommunication, Computing, Electronics and Control &#13;
Design of optimal search engine using text summarization through artificial intelligence techniques</text>
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                <text>Artificial intelligence, Bot creation, Natural language processing, Search engine, Text summarization</text>
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                <text>Natural language processing is the trending topic in the latest research areas, which allows the developers to create the human-computer interactions to come into existence. The natural language processing is an integration of artificial intelligence, computer science and computer linguistics. The research towards natural Language Processing is focused on creating innovations towards creating the devices or machines which operates basing on the single command of a human. It allows various Bot creations to innovate the instructions from the mobile devices to control the physical devices by allowing the speech-tagging. In our paper, we design a search engine which not only displays the data according to user query but also performs the detailed display of the content or topic user is interested for using the summarization concept. We find the designed search engine is having optimal response time for the user queries by analyzing with number of transactions as inputs. Also, the result findings in the performance analysis show that the text summarization method has been an efficient way for improving the response time in the search engine optimizations. </text>
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Band-pass filter based on complementary split ring resonator</text>
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                <text>This letter presents a new circuit of the band-pass filter designed by using microstrip technology. Based on complementary split ring resonator and various series of optimization technic and a specific design method, a miniature band-pass filter with excellent electrical performances is achieved. First of all, the metamaterial unit cell is studied to obtain a desired resonant frequency and it is implemented in the ground plan in order to increase the characteristics of the bandpass behavior and decrease its operating frequencies. This proposed circuit is designed on an FR-4 substrate having a relative permittivity of 4.4 tangential losses of 0.025 and thickness of 1.6 mm. This filter is developed by using CST Microwave. The obtained features allow this filter to be used in diverse wireless applications such as IMT-E and WiMax. </text>
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A new model for large dataset dimensionality reduction based on teaching learning-based optimization and logistic regression </text>
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                <text>One of the human diseases with a high rate of mortality each year is breast cancer (BC). Among all the forms of cancer, BC is the commonest cause of death among women globally. Some of the effective ways of data classification are data mining and classification methods. These methods are particularly efficient in the medical field due to the presence of irrelevant and redundant attributes in medical datasets. Such redundant attributes are not needed to obtain an accurate estimation of disease diagnosis. Teaching learning-based optimization (TLBO) is a new metaheuristic that has been successfully applied to several intractable optimization problems in recent years. This paper&#13;
presents the use of a multi-objective TLBO algorithm for the selection of&#13;
feature subsets in automatic BC diagnosis. For the classification task in this work, the logistic regression (LR) method was deployed. From the results, the projected method produced better BC dataset classification accuracy (classified into malignant and benign). This result showed that the projected TLBO is an efficient features optimization technique for sustaining data-based decision-making systems. </text>
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                <text>DOI: 10.12928/TELKOMNIKA.v18i3.13764</text>
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Chaos synchronization in a 6-D hyperchaotic system with self-excited attractor</text>
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                <text>This paper presented stability application for chaos synchronization using a 6-D hyperchaotic system of different controllers and two tools: Lyapunov stability theory and Linearization methods. Synchronization methods based on nonlinear control strategy is used. The selecting controller's methods have been modified by applying complete synchronization. The Linearization methods can achieve convergence according to the of complete synchronization. Numerical simulations are carried out by using MATLAB to validate the effectiveness of the analytical technique. </text>
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                <text>DOI: 10.12928/TELKOMNIKA.v18i3.13672</text>
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                <text>Nguyen Thi Phuong Loan, Thinh Cong Tran</text>
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                <text>DOI: 10.12928/TELKOMNIKA.v18i3.13626</text>
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                <text>Sri Wahyuni</text>
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                <text>ISSN: 1693-6930</text>
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                <text>Innovative tactics are employed by terrorists to conceal weapons and&#13;
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make, variety, shape, or position on the suspect’s body despite concealment. </text>
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                <text>Ammar Wisam Altaher, Sabah Khudhair Abbas</text>
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                <text>DOI: 10.12928/TELKOMNIKA.v18i3.13541</text>
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                <text>Universitas Ahmad Dahlan</text>
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                <text>Sri Wahyuni</text>
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                <text>ISSN: 1693-6930</text>
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 Stochastic renewable energy resources integrated multi-objective optimal power flow</text>
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                <text>The modern state of electrical system consists the conventional generating units along with the sources of renewable energy. The proposed article recommends a method for the solution of single and multi-objective optimal power flow, integrating wind and solar output energy with traditional coal-based generating stations. In the first part of the article, the two wind power plants and one solar PV power plants are incorporated with the thermal power plants. The optimal power flow problem of single and conflicting multi-objectives are taken with this scenario. The second part of the paper, solar power plant is replaced with another wind power plant with the conventional coal-based power plants. The techno-economic analysis are done with this state of electrical system. In proposed work, lognormal and weibull probability distribution functions are also utilized for predicting solar and wind outputs, respectively. A non-dominated multi-objective moth flame&#13;
optimization technique is used for the optimization issue. The fuzzy&#13;
decision-making approach is applied for extracting the best compromise&#13;
solution. The results are validated though adapted IEEE-30 bus test system, which is incorporated with wind and solar generating plants.</text>
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                <text>DOI: 10.12928/TELKOMNIKA.v18i3.13466</text>
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