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Latent semantic analysis and cosine similarity for hadith search engine

10.12928/telkomnika.v18i1.14874
Wahyudin; UIN Sunan Gunung Djati Bandung Darmalaksana , Cepy; UIN Sunan Gunung Djati Bandung Slamet , Wildan Budiawan; UIN Sunan Gunung Djati Bandung Zulfikar , Imam Fahmi; UIN Sunan Gunung Djati Bandung Fadillah , Dian Sa’adillah; UIN Sunan Gunung Djati Bandung Maylawati , Hapid; UIN Sunan Gunung Djati Bandung Ali
Search engine technology was used to find information as needed easily, quickly and efficiently, including in searching the information about the hadith which was a second guideline of life for muslim besides the Holy Qur'an. This study was aim to build a specialized search engine to find information about a complete and eleven hadith in Indonesian language. In this research, search engines worked by using latent semantic analysis (LSA) and cosine similarity based on the keywords entered. The LSA and cosine similarity methods were used in forming structured representations of text data as well as calculating the similarity of the keyword text entered with hadith text data, so the hadith information was issued in accordance with what was searched. Based on the results of the test conducted 50 times, it indicated that the LSA and cosine similarity had a success rate in finding high hadith information with an average recall value was 87.83%, although from all information obtained level of precision hadith was found semantically not many, it was indicated by the average precision value was 36.25%.
Volume: 18
Issue: 1
Page: 217-227
Publish at: 2020-02-01

Development of a research project repository

10.12928/telkomnika.v18i1.10452
Somefun; Covenant University T. E. , Awosope; Covenant University C. O. A. , Sika; Covenant University C.
The advances of technology resulting in the proliferation of mobile devices have changed the way we live and have necessitated the restructuring of the educational system. This can be employed to aid student’s participation in research studies. This study aims at promoting- research in universities amongst students by giving them the opportunity to exercise their scholarly abilities, easy access to research projects carried out by other students, collaboration with other students with similar research inclinations as well as gain visibility before the school management or companies interested in granting scholarships to outstanding works. This project is implemented using JavaScript, HTML and CSS for the front-end; Node.js, a JavaScript framework for the back-end and MongoDB for the database. It is a web application that enables the students to upload their research works, view the research of others and collaborate with peers. This system has a high potential to enhance student participation in universities’ research studies.
Volume: 18
Issue: 1
Page: 156-165
Publish at: 2020-02-01

Enhancement of the power system distribution reliability using ant colony optimization and simulated annealing methods

10.11591/ijeecs.v17.i2.pp877-885
Hadi Suyono , Rini Nur Hasanah , Panca Mudjirahardjo , M Fauzan Edy Purnomo , Septi Uliyani , Ismail Musirin , Lilik J. Awalin
The increasing demand of electricity and number of distributed generations connected to power system greatly influence the level of power service reliability. This paper aims at improving the reliability in an electric power distribution system by optimizing the number and location of sectionalizers using the Ant Colony Optimization (ACO) and Simulated Annealing (SA) methods. Comparison of these two methods has been based on the reliability indices commonly used in distribution system: SAIFI, SAIDI, and CAIDI. A case study has been taken and simulated at a feeder of Pujon, a place in East Java province of Indonesia, to which some distributed generators were connected. Using the existing reliability indices condition as base reference, the addition of two distributed plants, which were micro hydro and wind turbine plants, has proven to lower the indices as much as 0.78% for SAIFI, 0.79% for SAIDI, and 2.32% for CAIDI. The optimal relocation of the existing 16 sectionalizers in the network proved to decrease further the reliability indices as much as 43.96% for SAIFI, 45.52% for SAIDI, and 2.8% for CAIDI, which means bringing to much better reliability condition. The implementation of the SA method on the considered data in general resulted in better reliability indices than using the ACO method.
Volume: 17
Issue: 2
Page: 877-885
Publish at: 2020-02-01

Stepper motor movement design based on FPGA

10.11591/ijece.v10i1.pp151-159
Freddy Artadima Silaban , Setiyo Budiyanto , Wahyu Kusuma Raharja
A stepper motor is an electro mechanical device that can convert electrical pulses to the axis of movement. The finding problem  in the movement of a stepper motor is  cannot respond to the clock signal directly because the motor windings require a clock (sequence) in the correct order. If the control signal given is not correct, the motor is not moving according to the specified precision. To answer these problems, it is necessary to move the stepper motor with a clock signal that works in real time. The research method is done by designing and testing the stepper motor movement in full stepp and half step with the direction of Clock Wise (CW) and Counter Clock Wise (CCW) movement. These are simulated by using FPGA Isim and implementation using a stepper motor. The results of several experiments have been carried out the stepper motor movement degree according to the input value entered,responding timely movement, and the direction of movement stepper motor.
Volume: 10
Issue: 1
Page: 151-159
Publish at: 2020-02-01

Sizing verification of a 4kWp retrofitted grid-connected photovoltaic system: a case study in Shah Alam, Malaysia

10.11591/ijeecs.v17.i2.pp654-661
F.A.M. Shukor , H. Zainuddin , A. Manja , F. L. M. Khir
Electricity are commonly generated from several types of energy resources such as fossil and nuclear energy. However, due to emission of carbon dioxide from both sources, renewable energy is introduced to provide a clean and secure sustainable energy. One of the potential renewable energy application is Photovoltaic (PV) system; namely grid-connected photovoltaic (GCPV) system and stand-alone photovoltaic (SAPV) system. In this study, a mathematical approach of SEDA’s GCPV sizing model is implemented to size a 4kWp of a retrofitted GCPV system by the method claimed to be the best practice mathematical design model under tropical climate Malaysia.  The outcome of the sizing approach will then be evaluated with HelioScope software, one of commercial simulation tools available in current market.  The final result obtained from both methods shows that the final PV array configuration is 1 x 12 (parallel x series) which is in agreement to the actual installed system.
Volume: 17
Issue: 2
Page: 654-661
Publish at: 2020-02-01

Novel high functionality fault tolerant ALU

10.12928/telkomnika.v18i1.12645
Shaveta; Manav Rachna International Institute of Research & Studies Thakral , Dipali; Manav Rachna International Institute of Research & Studies Bansal
Miniaturization, cost, functionality, complexity and power dissipation are important and necessary design traits which need attention in circuit designing. There is a trade off between miniaturization and power dissipation. Smart technology is always searching for new paradigms to continue improve power dissipation. Reversible logic is one of smart computing deployed to avoid power dissipation. Researchers have proposed many reversible logic-based arithmetic and logic units (ALU). However, the research in the area of fault tolerant ALU is still under progress. The aim of this paper is to bridge the knowledge gap for a new researcher in area of fault tolerance using parity preserving logic gates rather than searching huge data through various sources. This paper also presents a high functionality based novel fault tolerant arithmetic and logic unit architecture. A comparison on optimization aspects is presented in tabular form and results shows that proposed ALU architecture is optimum balance in terms of all aspects of reversible logic synthesis. The proposed ALU architecture is coded in Verilog HDL and simulated using Xilinx ISE design suit 14.2 tool. The quantum cost of all gates used in proposed architecture is verified using RCViewer + tool.
Volume: 18
Issue: 1
Page: 234-239
Publish at: 2020-02-01

Minimize MIMO OFDM interference and noise ratio using polynomial-time algorithm

10.11591/ijece.v10i1.pp900-907
Muhamed K. Husein
In the distributed transmit antenna MIMO OFDM system, each transmitting antenna has different frequency offset between each transmitting antenna and receiver due to the use of independent crystal oscillator. This paper proposes Polynomial-time algorithm for correcting the frequency offset in a received signal by maximizing the conditional average signal. The algorithm focus on reducing to interference and noise ratio of each subcarrier on the receiving antenna by frequency offset. The simulation result shows the performance of the proposed algorithm is slightly improved compared with the existing frequency offset correction algorithm, and the complexity is reduced by 50% or more.
Volume: 10
Issue: 1
Page: 900-907
Publish at: 2020-02-01

Design and optimization of microstrip filtering antenna with modified shaped slots and SIR filter to improve the impedance bandwidth

10.12928/telkomnika.v18i1.13532
Hana; Southern Technical University Abdel-Jabbar , Ahmed Sabri; Southern Technical University Kadhim , Ameer L.; University of Misan saleh , Yasir I. A.; University of Bradford Al-Yasir , Naser Ojaroudi; University of Bradford Parchin , Raed A.; University of Bradford Abd-Alhameed
This paper presents a new compact microstrip filtering antenna with modified shaped slots to improve the impedance bandwidth. The proposed microstrip filtering antenna consists of three parts; the monopole radiating patch antenna, the SIR filter, and the feeding microstrip line. The design structure is achieved on one sided glass epoxy FR-4 substrate with dielectric constant ε_r = 4.4 and thickness of h = 1.6 mm. The design procedures of the proposed filtering antenna starts from the second order Chebyshev low pass filter prototype. The simulation results throughout this article are done by a computer simulation technology (CST) software. The simulated results have been achieved show good performance of S11-parameter and broad side antenna gain on +z-direction. This design has two transmission zeros at 5.4 GHz and 7.7 GHz, and bandwidth (B.W) of about 1.66 GHz so; it is suitable for high speed data communication. This design has good skirt selectivity.
Volume: 18
Issue: 1
Page: 545-551
Publish at: 2020-02-01

Secured e-payment system based on automated authentication data and iterated salted hash algorithm

10.12928/telkomnika.v18i1.15623
Ali Al; University of Kufa Farawn , Hasanein D.; University of Kufa Rjeib , Nabeel Salih; University of Kufa Ali , Basheer; University of Kufa Al-Sadawi
Electronic payment has been considered as one of the most significant and convenient applications of modern electronic services e-University compared to traditional methods that impose time-consuming, human resources, and inefficiency. Different automatic identification technologies have been widely used, such as radio frequency identification (RFID). Extensive research and several applications are focusing on taking the maximum advantage of RFID technology. Data and information security had considered a crucial role when information concerning e-commerce, e-banking, or e-payments, especially due to it required real data to establish accessed illegally. Hence, data originality and security fall a very significant and critical issue in data communication services in recent years. Applications such as e-banking or e-commerce regularly contain sensitive and personal information that should be managed and controlled by authorized persons. Thus, keeping a secure password is important to prevent unauthorized users from illegal access. The password hashing is one of the safety methods and means of preventing attacks. In this article, focuses on proposing an RFID based electronic payment and also provide multi-level security privileges for an academic domain by using RFID technology besides the programmable logic circuit as well the system used VB.Net C# environment also desktop and web-based application for system working purposes. The proposed system aims to manage student payments in a secure manner and provides the capabilities of getting a bus ticket, copying books, buying food, paying registration fees, and other services. The results have shown the system is secured by using the confirmation code in addition to password encryption.
Volume: 18
Issue: 1
Page: 538-544
Publish at: 2020-02-01

Battery charging and discharging control of a hybrid energy system using microcontroller

10.11591/ijeecs.v17.i2.pp575-582
Triyanto Pangaribowo , Wahyu Mulyo Utomo , Afarulrazi Abu Bakar , Deni Shidqi Khaerudini
This study aims to control charging and discharging the battery for hybrid energy systems. The control system works by selecting the right energy source to supply voltage to the load. And also this control system can regulate charging and discharging the battery automatically. The voltage source consists of two energy, namely from the battery and DC source. The control system that has been designed has the ability to choose the right DC source when the battery capacity is less than 80%. This system also has a good ability to choose a battery source when the battery reaches 100% capacity and the DC source has a voltage drop of more than 20%. This control system is equipped with excessive electric current protection so that the security level is high.
Volume: 17
Issue: 2
Page: 575-582
Publish at: 2020-02-01

An overview of multi-filters for eliminating impulse noise for digital images

10.12928/telkomnika.v18i1.12888
Achmad; Universiti Malaysia Perlis Abdurrazzaq , Ahmad Kadri; Universiti Malaysia Perlis Junoh , Wan Zuki Azman; Universiti Malaysia Perlis Wan Muhamad , Zainab; Universiti Malaysia Perlis Yahya , Ismail; Universiti Putra Malaysia Mohd
An image through the digitization process is referred to as a digital image. The quality of the digital image may be degenerating due to interferences on the acquisition, transmission, extraction, etc. This attracted the attention of many researchers to study the causes of damage to the information in the image. In addition to finding cause of image damage, the researchers also looking for ways to overcome this problem. There are many filtering techniques that have been introduced to deal the damage to the information in the image. In addition to eliminating noise from the image, filtering techniques also aims to maintain the originality of the features in the image. Among the many research papers on image filtering there is a lack of review papers which are an important to facilitate researchers in understanding the differences in each filtering technique. Additionally, it helps researchers determine the direction of research conducted based on the results of previous research. Therefore, this paper presents a review of several filtering techniques that have been developed so far.
Volume: 18
Issue: 1
Page: 385-393
Publish at: 2020-02-01

Continuous speech segmentation using local adaptive thresholding technique in the blocking block area method

10.12928/telkomnika.v18i1.13958
Roihan Auliya; Universitas Diponegoro Ulfattah , Sukmawati Nur; Diponegoro University Endah , Retno; Universitas Diponegoro Kusumaningrum , Satriyo; Universitas Diponegoro Adhy
Continuous speech is a form of natural human speech that is continuous without a clear boundary between words. In continuous speech recognition, a segmentation process is needed to cut the sentence at the boundary of each word. Segmentation becomes an important step because a speech can be recognized from the word segments produced by this process. The segmentation process in this study was carried out using local adaptive thresholding technique in the blocking block area method. This study aims to conduct performance comparisons for five local adaptive thresholding methods (Niblack, Sauvola, Bradley, Guanglei Xiong and Bernsen) in continuous speech segmentation to obtain the best method and optimum parameter values. Based on the results of the study, Niblack method is concluded as the best method for continuous speech segmentation in Indonesian language with the accuracy value of 95%, and the optimum parameter values for such method are window = 75 and k = 0.2.
Volume: 18
Issue: 1
Page: 407-418
Publish at: 2020-02-01

UWB THz plasmonic microstrip antenna based on graphene

10.12928/telkomnika.v18i1.13153
Hussein A.; AL-Mustansiriyah University Abdulnabi , Mushreq Abdulhussain; AL-Mustansiriyah University Shuriji , Sadiq; AL-Mustansiriyah University Ahmed
This paper proposes design and investigate of graphene based plasmonic microstrip antenna for terahertz high speed communication and application systems (0.1-20) THz. The proposed antenna structure composed of graphene-based rectangular patch and transmission line mounted on a grounded silicone dioxide substrate. SPP (Surface Plasmon Polariton) waves that appear in graphene at THz band is analyzed. The proposed antenna simulation was done by using numerical method CST program. The simulation results show the scattering parameter S11 less than -10 dB at frequency band (0.1-20) THz. Also, the presented antenna system has a good gain along the frequency band.
Volume: 18
Issue: 1
Page: 30-36
Publish at: 2020-02-01

The application of (Y,Gd)BO3:Tb3+ and CaGa2S4:Mn2+ phosphors to remote white light-emitting diodes

10.12928/telkomnika.v18i1.13713
Thuc Minh; Nha Trang University Bui , Nguyen Thi Phuong; Posts and Telecommunications Institute of Technology Loan , Phan Xuan; HCMC University of Food Industry Le , Nguyen Doan Quoc; Ton Duc Thang University Anh , Anh Tuan; Ton Duc Thang University Le , Le Van; Vietnam Academy of Science and Technology Tho
The remote phosphor structure is superior to the conformal phosphor and the in-cup phosphor in terms of lighting efficiency; however, managing the color quality of the remote phosphor structure has been a nuisance to the manufacturers. To address this problem, many researches were conducted and the results suggested that using dual-layer phosphor structure and triple-layer phosphor structure could improve the color quality in remote phosphor structures. The purpose of this article is to study which one between the two configurations mentioned above allows multi-chip white LEDs (WLEDs) to reach highest indexes in color rendering index (CRI), color quality scale (CQS), luminous flux (LF), and color uniformity. The color temperature of the WLEDs used for the experiments in this article is 8500 K. The result of this research shows that the triple-layer phosphor configuration has higher CRI, CQS, and LE and also able to reduce color deviation resulting in better color uniformity. This conclusion can be verified by analyzing the scattering features of the phosphor layers using the Mie-theory. Being verifiable increases the reliability of the research result and makes it a valuable reference for producing better quality WLEDs.
Volume: 18
Issue: 1
Page: 351-357
Publish at: 2020-02-01

Implementation of graphical user interface to observe and examine the frequency and rotor angle stability of a power system due to small disturbances

10.11591/ijeecs.v17.i2.pp606-614
Nur Ashida Salim , Mohamad Salehan Ab. Samah , Hasmaini Mohamad , Zuhaila Mat Yasin , Nur Fadilah Ab Aziz
The aim of this research is to anticipate the stability status of a power system when the system is exposed to a change in frequency and rotor angle due to small disturbances. The proposed study was implemented on the IEEE Reliability Test System 1979 (IEEE RTS-79) which contains 24 buses, 38 transmission lines and 32 generators. Steady state stability limit of a system refers to the maximum amount of power that is permissible through the system without loss of its steady state stability. This research proposes the development of a Graphical User Interface (GUI) to observe the frequency and rotor angle stability due to the effect of small disturbances using the One Machine Infinite Bus (OMIB) technique. This proposed technique could ease the power system utility especially the power system operation to observe and examine the system frequency and rotor angle stability due to small disturbances. The findings from this research has proven that the proposed technique to observe the frequency and rotor angle stability due to small disturbances has successfully been developed using a GUI.
Volume: 17
Issue: 2
Page: 606-614
Publish at: 2020-02-01
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