Articles
<![CDATA[A Review of Hybrid Battery Management System (H-BMS) for EV ]]>
<![CDATA[Nur Huda Mohd Amin]]>;
<![CDATA[Mohd Ruddin Ab Ghani]]>;
<![CDATA[Auzani Jidin]]>;
<![CDATA[Zanariah Jano]]>;
<![CDATA[Tole Sutikno]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 16, No 3: June 2018 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v16i3.8743
<![CDATA[Significant to a major pollution contributor in passenger vehicles, electric vehicles are more acceptable to use on the road. Electric Vehicles (EVs) burn energy based on the usage of the battery. The usage of the battery in EVs is monitored and controlled by Battery Management System (BMS). A few factors monitor and control Battery Management System (BMS). This paper reviewed the battery charging technology and Remote Terminal Unit (RTU) development as a Hybrid Battery Management System (H-BMS) for Electric Vehicle (EV).]]>
<![CDATA[FPGA for Robotic Applications: from Android/Humanoid Robots to Artificial Men ]]>
<![CDATA[Tole Sutikno]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 9, No 3: December 2011 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v9i3.4455
<![CDATA[Researches on home robots have been increasing enormously. There has always existed a continuous research effort on problems of anthropomorphic robots which is now called humanoid robots. Currently, robotics has evolved to the point that different branches have reached a remarkable level of maturity, that neural network and fuzzy logic are the main artificial intelligence as intelligent control on the robotics. Despite all this progress, while aiming at accomplishing work-tasks originally charged only to humans, robotic science has perhaps quite naturally turned into the attempt to create artificial men. It is true that artificial men or android humanoid robots open certainly very broad prospects. This “robot” may be viewed as a personal helper, and it will be called a home-robot, or personal robot.]]>
<![CDATA[Accurate characterizations of material using microwave T-resonator for solid sensing applications ]]>
<![CDATA[Rammah A. Alahnomi]]>;
<![CDATA[Z. Zakaria]]>;
<![CDATA[Zulkalnain Mohd Yussof]]>;
<![CDATA[Tole Sutikno]]>;
<![CDATA[H. Sariera]]>;
<![CDATA[Amyrul Azuan Mohd Bahar]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 18, No 1: February 2020 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v18i1.14880
<![CDATA[The topic of microwave sensors in enclosures is one of the most active areas in material characterization research today due to its wide applications in various industries. Surprisingly, a microwave sensor technology has been comprehensively investigated and there is an industry demand for an accurate instrument of material characterization such as food industry, quality control, chemical composition analysis and bio-sensing. These accurate instruments have the ability to understand the properties of materials composition based on chemical, physical, magnetic, and electric characteristics. Therefore, a design of the T-resonator has been introduced and investigated for an accurate measurement of material properties characterizations. This sensor is designed and fabricated on a 0.787 mm-thickness Roger 5880 substrate for the first resonant frequency to resonate at 2.4 GHz under unloaded conditions. Various standard dielectric of the sample under test (SUT) are tested to validate the sensitivity which making it a promising low-cost, compact in size, ease of fabrication and small SUT preparation for applications requiring novel sensing techniques in quality and control industries.]]>
<![CDATA[A Review on Methods of Identifying and Counting Aedes Aegypti Larvae using Image Segmentation Technique ]]>
<![CDATA[Mohamad Aqil Mohd Fuad]]>;
<![CDATA[Mohd Ruddin Ab Ghani]]>;
<![CDATA[Rozaimi Ghazali]]>;
<![CDATA[Mohamad Fani Sulaima]]>;
<![CDATA[Mohd Hafiz Jali]]>;
<![CDATA[Tole Sutikno]]>;
<![CDATA[Tarmizi Ahmad Izzuddin]]>;
<![CDATA[Zanariah Jano]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 15, No 3: September 2017 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v15i3.6422
<![CDATA[Aedes aegypti mosquitoes are a small slender fly insect that spreads the arbovirus from flavivirus vector through its sucking blood. An early detection of this species is very important because once these species turn into adult mosquitoes a population control becomes more complicated. Things become worse when difficult access places like water storage tank becomes one of the breeding favorite places for Aedes aegypti mosquitoes. Therefore, there is a need to help the field operator during the routine inspection for an automated identification and detection of Aedes aegypti larvae, especially at difficult access places. This paper reviews different methodologies that have been used by various researchers in identifying and counting Aedes aegypti. The objective of the review was to analyze the techniques and methods in identifying and counting the Aedes Aegypti larvae of various fields of study from 2008 and above by taking account their performance and accuracy. From the review, thresholding method was the most widely used with high accuracy in image segmentation followed by hidden Markov model, histogram correction and morphology operation region growing.]]>
<![CDATA[Enhanced symmetrical split ring resonator for metallic surface crack detection ]]>
<![CDATA[Rammah A. Alahnomi]]>;
<![CDATA[Z. Zakaria]]>;
<![CDATA[Zulkalnain Mohd Yussof]]>;
<![CDATA[Tole Sutikno]]>;
<![CDATA[Ammar Alhegazi]]>;
<![CDATA[Ahmed Ismail Abu-Khadrah]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 17, No 4: August 2019 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v17i4.12939
<![CDATA[An enhanced sensor based on symmetrical split ring resonator (SSRR) functioning at microwave frequencies has been proposed in order to detect and characterize the metal crack of the materials. This sensor is based on perturbation theory, in which the dielectric properties of the material affect the quality factor and resonance frequency of the microwave resonator. Conventionally, coaxial cavity, waveguide, dielectric resonator techniques have been used for characterizing materials. However, these techniques are often large, and expensive to build, which restricts their use in many important applications. Thus, the enhanced bio-sensing technique presents advantages such as high measurement sensitivity with the capability of suppressing undesired harmonic spurious and permits potentially metal crack material detection. Hence, using a High Frequency Structure Simulator (HFSS) software, the enhanced sensor is modeled and the reflection S11 is performed for testing the aluminum metal with crack and without crack at the frequency range of 100 MHz to 3GHz. Variation of crack width and depth has been investigated and the most obvious finding emerged from this study is that the ability of detecting a minimum of sub-millimeter crack width and depth which is a round 10 ????m width or depth where the minimum shift of reflected frequency is recorded at 6.2 MHz and 3 MHz for crack width and depth respectively. The enhanced SSRR provides high capability of detecting small crack defection by utilizing the interaction between coupled gap resonators and it is useful for various applications such as aircraft fuselages, nuclear power plant steam generator tubing, and steel bridges and for others that can be compromised by metal fatigue.]]>
<![CDATA[MPPT for PV System Based on Variable Step Size Perturb and Observe Algorithm ]]>
<![CDATA[Awang Jusoh]]>;
<![CDATA[Rozana Alik]]>;
<![CDATA[Tan Kar Guan]]>;
<![CDATA[Tole Sutikno]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 15, No 1: March 2017 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v15i1.3160
<![CDATA[This paper presents some improvements on the Perturb and Observe (P&O) method to overcome the common drawbacks of conventional P&O method. The main advantage of this modified algorithm is its simplicity with higher accuracy results, compared to the conventional methods. The operation of the entire solar Maximum Power Point Tracking (MPPT) system was observed through two different approaches, which are through MATLAB/Simulink simulation and hardware implementation. A small scale of hardware design, which consists of solar PV cell, boost converter and Arduino Mega2560 microcontroller had been utilized for further verification on the simulation results. The simulation results that was carried out by this modified P&O algorithm showed improvement and a promising performance: faster convergence speed of 0.67s, small oscillation at steady state region and promising efficiency of 95.23%. Besides, from the hardware results, the convergence time of the power curve was able to maintain at 0.2s and give almost zero oscillation during steady state. It is envisaged that the method is useful in future research of Photovoltaic (PV) system.]]>
<![CDATA[SISTEM KENDALI PERALATAN RUMAH TANGGA BERBASIS HT DAN MIKROKONTROLER AT89S51 ]]>
<![CDATA[Muchlas Muchlas]]>;
<![CDATA[Tole Sutikno]]>;
<![CDATA[Sahnan Sahnan]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 4, No 1: April 2006 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v4i1.1242
<![CDATA[Aplikasi sistem kendali peralatan listrik rumah tangga menggunakan frekuensi radio HT (handy talky) sebagai media pengendali (remote controll) masih perlu diteliti lebih spesifik. Penelitian ini bertujuan untuk memperoleh suatu desain rangkaian kendali menggunakan radio HT, serta untuk mengetahui unjuk kerjanya. Subjek dari penelitian ini adalah sistem yang dibangun dalam sebuah sistem pengendali jarak jauh dengan memanfaatkan radio transceiver 2 meter untuk mentransmisikan data yang telah dikodekan dalam bentuk sinyal DTMF (Dual Tone Multiple Frequency). Sistem ini menggunakan mikrokontroler AT89S51 sebagai pemroses utama. Bagian penerima pada rangkaian objek kendali menangkap, menguatkan, mengubah menjadi bilangan biner 4 bit dan akan diolah oleh AT89S51 sehingga dapat mengendalikan peralatan elektonik secara on/off. Rangkaian pengendali objek akan menampilkan kondisi peralatan elektronik apakah dalam kondisi on/off kepada bagian kendali yang akan ditampilkan pada display. Hasil penelitian menunjukkan bahwa sistem kendali dengan media HT dapat digunakan sebagai kendali jarak jauh untuk menghidupkan dan mematikan peralatan peralatan rumah tangga. Konsumsi daya yang dibutuhkan adaah sebesar 5.335 watt.]]>
<![CDATA[DESAIN DAN PENGGUNAAN “e2gLite Expert System Shell” UNTUK DIAGNOSIS PENYAKIT THT ]]>
<![CDATA[Lina Handayani]]>;
<![CDATA[Tole Sutikno]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 3, No 1: April 2005 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v3i1.1213
<![CDATA[Studi empiris telah membuktikan bahwa para ahli medis tidak selalu menghasilkan keputusan diagnosis medis yang optimal, karena banyaknya informasi yang harus diolah untuk membuat diagnosis yang optimal. Otak manusia memiliki kemampuan untuk menerima informasi, menganalisis, menggambarkan, menciptakan, berkonsentrasi dan berpikir, namun sangat terbatas jika digunakan untuk menyimpan fakta-fakta yang banyak secara permanen, memanggil fakta-fakta tersebut kembali dengan cepat dan tepat, serta menangani variabel-variabel yang berbeda pada saat yang bersamaan. E2gLite memberikan kemudahan dalam hal pembangunan sistem pakar serta pelaksanaan konsultasi oleh pengguna. Pada desain sistem pakar berbasis web dengan shell e2gLite harus dibuat 2 buah file, yaitu file halaman web yang berisi applet e2gLite dan file basis pengetahuan. Kedua file tersebut harus ditulis dengan format yang telah ditentukan oleh pembuat e2gLite.. Paper ini akan menjelaskan desain dan penggunaan sistem pakar untuk diagnosis penyakit THT berbasis web dengan shell e2gLite. Berdasarkan hasil pengujian, sistem pakar yang didesain dengan shell e2gLite untuk diagnosis penyakit THT, dapat bekerja sesuai yang diharapkan. Sistem dapat mengindentifikasikan 23 jenis penyakit THT berdasarkan variasi input 38 gejala yang diberikan. Sistem juga dilengkapi dengan fasilitas yang memungkinkan Pengguna memiliki kesempatan untuk mengetahui mengapa sebuah pertanyaan diajukan dan meminta penjelasan bagaimana sebuah kesimpulan diambil oleh sistem.]]>
<![CDATA[Accurate harmonic source identification using S-transform ]]>
<![CDATA[Mohd Hatta Jopri]]>;
<![CDATA[Abdul Rahim Abdullah]]>;
<![CDATA[Rony Karim]]>;
<![CDATA[Srete Nikolovski]]>;
<![CDATA[Tole Sutikno]]>;
<![CDATA[Mustafa Manap]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 18, No 5: October 2020 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v18i5.5632
<![CDATA[This paper introduces the accurate identification of harmonic sources in the power distribution system using time-frequency distribution (TFD) analysis, which is S-transform. The S-transform is a very applicable method to represent signals parameters in time-frequency representation (TFR) such as TFR impedance (ZTFR) and the main advantages of S-transform it can provide better frequency resolution for low frequency components and also offers better time resolution for high-frequency components. The identification of multiple harmonic sources are based on the significant relationship of spectral impedances (ZS) that extracted from the ZTFR, consist of the fundamental impedance (Z1) and harmonic impedance (Zh). To verify the accuracy of the proposed method, MATLAB simulations carried out several unique cases on IEEE 4-bus test feeder cases. It is proven that the proposed method is superior, with 100% correct identification of harmonic source location. It is proven that the method is accurate, fast and cost-efficient to localize harmonic sources in the power distribution system.]]>
<![CDATA[PERANCANGAN ALAT UKUR GOLONGAN DARAH BERBASIS MIKROKONTROLER AT89S52 ]]>
<![CDATA[Muchlas Muchlas]]>;
<![CDATA[Tole Sutikno]]>;
<![CDATA[Santiko Santiko]]>
<![CDATA[ TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 5, No 2: August 2007 ]]>
Publisher : <![CDATA[Universitas Ahmad Dahlan ]]>
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DOI: 10.12928/telkomnika.v5i2.1349
<![CDATA[Golongan darah yang dibutuhkan pasien haruslah sesuai dengan golongan darah pendonor, karena apabila tidak sesuai akan mengakibatkan reaksi-reaksi alergi. Selama ini, untuk menentukan golongan darah dilakukan secara manual dengan mencampurkan cairan antisera A pada sampel darah satu dan antisera B ke sampel darah kedua dari tiap pendonor yang akan ditentukan golongan darahnya. Atas dasar kombinasi terjadi atau tidaknya reaksi penggumpalan pada darah pada kedua sampel yang dicampur antisera tersebut, golongan darah pendonor ditentukan. Penelitian ini bertujuan untuk merancang purwarupa alat yang dapat menentukan golongan darah banyak pendonor secara otomatis dengan tampilan digital. Alat dirancang agar dapat menentukan golongan darah dari 8 pendonor secara sekuensial tiap satu set pengukuran. Tiap 2 sampel darah pendonor yang masing-masing telah diberi antisera A dan B diletakkan pada kaca preparat di atas rotary disc yang digerakkan dengan motor DC, untuk selanjutnya ditentukan golongan darahnya satu persatu atas dasar proses aglutinasi yang terjadi. Pengaturan sistem kerja alat ini berbasis mikrokontroler AT89S52. Hasil penelitian menunjukkan bahwa telah dapat dirancang purwarupa otomatisasi alat ukur golongan darah secara on-line dan real-time yang dapat menentukan golongan darah A, B, O dan AB secara sekuensial atas sampel darah 8 pendonor dalam tiap satu set pengukuran.]]>
