ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika最新文献

{"title":"Evaluasi Kinerja PLTS 1000 Wp di Itenas Bandung","authors":"Fery Hidayat, Dani Rusirawan, Iqbal Tanjung","doi":"10.26760/elkomika.v7i1.195","DOIUrl":"https://doi.org/10.26760/elkomika.v7i1.195","url":null,"abstract":"ABSTRAKPembangkit Listrik Tenaga Surya (PLTS) merupakan salah satu sistem pembangkit non-konvensional yang dapat menggantikan peran pembangkit listrik konvensional. Saat ini Institut Teknologi Nasional Bandung (Itenas) sedang mengembangkan instalasi PLTS 1000 Wp jenis grid connected system, menggunakan modul fotovoltaik (FV) tipe monokristalin. Dalam artikel ini, hasil evaluasi berbagai parameter utama modul FV akan dipaparkan dalam rangka mendapatkan kinerja dari PLTS. Pengukuran parameter utama modul FV dilakukan dengan menggunakan mikrokontroler Arduino Mega 1.8.2 meliputi radiasi matahari (G) dan temperatur lingkungan (Ta), sebagai parameter masukan serta tegangan (V), arus (I) dan temperatur sel/modul FV (Tc), sebagai parameter keluaran. Pengukuran parameter utama bertujuan untuk memperoleh daya (P), efisiensi (η) serta energi kumulatif (Ek) dari PLTS terpasang. Dari hasil pengujian selama 6 hari, diperoleh daya, efisiensi, dan produksi energi kumulatif rata-rata harian PLTS terpasang adalah 535,99 W/hari, 14,29 % dan 2,64 kWh.Kata kunci: fotovoltaik, monokristalin, daya dan efisiensi rata-rata harian ABSTRACTThe solar power plant (SPP) is one of non convensional power plant, which can be used to substitute the conventional power plant. Presently, Institut Teknologi Nasional (Itenas) has been developed a 1000 Wp grid-connected SPP, using monocrystalline photovoltaic (PV) modules. In this paper, evaluation results of the PV modules parameters will be elaborated to figure out the PV modules characteristics, as a basic to evaluate the SPP performance. The measuring of PV modules have been done using arduino mega 1.8.2 microcontroller. The input parameters of the PV modules are solar radiation (G) and ambient temperature (Ta), meanwhile the output parameters are voltage (V), current (I) and cell/module temperature (Tc). All these parameters are used to estimate the power (P), efficiency (η) and cumulative energy (E). Based on measurements and evaluation during 6 days, it is found that the average of the power and efficiency of the SPP were 535,99 W/day and 14,29 %, respectively, and average yield of energy (daily) was 2,64 kWh .Keywords: photovoltaic, monocrystalline, daily power and efficiency average","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128230768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Implementasi Pengamanan Transmisi Sinyal EKG (Elektrokardiogram) secara Daring dengan Metode Anonimasi","authors":"Jusak Jusak, B. Setiawan, Sony Solehudin, I. Puspasari","doi":"10.26760/ELKOMIKA.V7I1.85","DOIUrl":"https://doi.org/10.26760/ELKOMIKA.V7I1.85","url":null,"abstract":"ABSTRAKData World Health Organization (WHO) pada tahun 2014 menunjukkan bahwa di Indonesia sebanyak 37% dari seluruh penyebab kematian adalah penyakit yang berhubungan dengan jantung. Kehadiran teknologi dan pemanfaatan Internet of Things (IoT) diharapkan dapat membantu mengurangi resiko kematian akibat penyakit jantung tersebut. Pada penelitian ini, pengukuran dan pengamatan sinyal jantung melalui tele-auskultasi sinyal elektrokardiogram (EKG) dilakukan. Untuk mengamankan sinyal EKG dalam proses transmisi melalui jaringan Internet digunakan metode anonimasi sinyal berbasis algoritma Jusak-Seedahmed. Hasil pengujian menunjukkkan bahwa algoritma Jusak-Seedahmed dapat melakukan proses anonimasi dan proses rekonstruksi sinyal dengan baik. Pengujian korelasi silang antara sinyal hasil rekonstruksi dan sinyal EKG asli sebelum anonimasi menghasilkan korelasi sebesar 1 pada lag=0. Sinyal EKG hasil rekonstruksi ditampilkan dalam aplikasi mobile untuk memudahkan analisis oleh dokter.Kata kunci: elektrokardiogram, keamanan, anonimasi, IoT, FFT ABSTRACTBased on the latest data released by the World Health Organization in 2014, deaths caused by cardiovascular disease in 2012 have reached 37% of the total number of non-communicable diseases deaths in Indonesia. Therefore, it is expected that the applications of the Internet of Things (IoT) might be used to reduce the risk of death due to the heart related problems. In this research, a tele-auscultation technique for measuring and monitoring electrocardiogram (ECG) signal was built. To secure transmission of the ECG signal over the Internet, we implemented a recently proposed Jusak-Seedahmed algorithm. Our examinations showed that the algorithm performed the anonymization and reconstruction processes well. Crosscorrelation analysis showed that correlation between the reconstructed and the original ECG signal at lag=0 was 1. Furthermore, a mobile-based application had been built to display the reconstructed ECG signal for further analysis.Keywords: electrocardiogram, security, anonimization, IoT, FFT","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117299159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deteksi Sinyal : Overview Model Parametrik menggunakan Kriteria Neyman-Pearson","authors":"Fiky Yosef Suratman, Aloysius Adya Pramudita, Dharu Arseno","doi":"10.26760/ELKOMIKA.V7I1.14","DOIUrl":"https://doi.org/10.26760/ELKOMIKA.V7I1.14","url":null,"abstract":"ABSTRAKDeteksi sinyal banyak diimplementasikan dalam sistem pengolahan sinyal yang sangat kompleks. Sebagai contoh digunakan pada sub sistem pengolahan sinyal radar pengintai yang berfungsi untuk deteksi dan pelacakan target. Salah satu implementasi terbaru dari deteksi sinyal adalah untuk fungsi spectrum sensing pada Cognitive Radio. Deteksi sinyal dapat didefinisikan sebagai binary hypothesis testing, yaitu memutuskan satu dari dua keadaan: hanya derau atau tidak ada sinyal (null hypothesis), dan ada sinyal (alternative hypothesis). Teori deteksi sinyal merupakan bidang yang cukup luas, sehingga paper ini fokus pada pendekatan parametrik dengan Teorema Neyman-Pearson. Kedua hypothesis dimodelkan dengan variabel acak dengan distribusi rapat kemungkinan yang sama tetapi mempunyai parameter yang berbeda. Ditunjukkan penurunan test statistic untuk dua skenario, yaitu distribusi dengan diketahui sebagian dan diketahui penuh. Bagian simulasi menunjukkan kinerja detektor sinyal secara analitis mempunyai hasil yang serupa dengan simulasi Monte Carlo.Kata kunci: deteksi sinyal, Neyman-Pearson, hypothesis testing, spectrum sensing, radar. ABSTRACTSignal detection has been used in many sophisticated signal processing systems, such as for signal processing in surveillance radar which is to detect and to track a radar target. Recently, signal detection is widely used for spectrum sensing in Cognitive Radio. Signal detection is a binary hypothesis testing problem which is to choose one out of two conditions, i.e., noise only or signal absence (null hypothesis), and signal presence (alternative hypothesis). Since signal detection theory is a wide area, this paper only focuses on parametric approach using Neyman-Pearson theorem. The two hypotheses are modeled by random variables having the same distribution but different parameters. The derivations of test statistics (detectors) are shown for two scenarios, i.e., partially known and perfectly known distributions. Analytical results and Monte Carlo simulations of the derived detectors show similar performances.Keywords: signal detection, Neyman-Pearson, hypothesis testing, spectrum sensing, radar.","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126184238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Image Hiding on Audio Subband Based On Centroid in Frequency Domain","authors":"Gelar Budiman, Irma Safitri, Rizky Damarjati Siregar","doi":"10.26760/ELKOMIKA.V7I1.29","DOIUrl":"https://doi.org/10.26760/ELKOMIKA.V7I1.29","url":null,"abstract":"ABSTRAK Audio watermarking adalah mekanisme penyembunyian data pada audio. Metode penyembunyian data yang digunakan dalam penulisan ini adalah Lifting Wavelet Transform (LWT), Fast Fourier Transform (FFT), Centroid dan Quantization Index Modulation (QIM). Langkah pertama adalah host audio tersegmentasi menjadi beberapa frame. Kemudian sub-band terpilih diubah oleh FFT dengan mengubah domain sub-band dari waktu ke frekuensi. Proses centroid digunakan untuk menemukan titik pusat frekuensi untuk lokasi penyisipan untuk mendapatkan output yang lebih stabil. Proses penyematan dilakukan dengan QIM. Kinerja watermarking oleh parameter yang disesuaikan memperoleh nilai imperceptibility dengan Signal to Noise Ratio (SNR) > 21 dB, Mean Opinion Score (MOS)> 3.8 dengan kapasitas = 86.13 bps. Selain itu, untuk sebagian besar file audio terwatermark yang diserang, metode ini tahan terhadap beberapa serangan seperti Low Pass Filter (LPF) dengan fco> 6 kHz, Band Pass Filter (BPF) dengan fco 50 Hz - 6 kHz, Linear Speed Change (LSC) dan MP4 Compression dengan Bit Error Rate (BER) kurang dari 20%. Kata kunci: FFT, subband, LWT, Centroid, Audio Watermarking, QIM ABSTRACT Audio watermarking is a mechanism for hiding data on audio. Data hiding methods used in this paper are Lifting Wavelet Transform (LWT), Fast Fourier  Transform (FFT), Centroid and Quantization Index Modulation (QIM). The first step is to segment host audio into several frames, then the selected sub-band is changed by the FFT by changing the sub-band domain from time to frequency. The centroid process is used to find the center of frequency for the insertion location to get a more stable output. The embedding process is done by QIM. The watermarking performance by adjusted parameters obtains the imperceptibility value with Signal to Noise Ratio (SNR)> 21 dB, Mean Opinion Score (MOS)> 3.8 with a capacity = 86.13 bps. In addition, for most of attacked watermarked audio files, this method is resistant to several attacks such as Low Pass Filter (LPF) with fco> 6 kHz, Band Pass Filter (BPF) with fco 50 Hz - 6 kHz, Linear Speed Change (LSC) and MP4 Compression with Bit Error Rate (BER) less than 20%. Keywords: FFT, subband, LWT, Centroid, Audio Watermarking, QIM","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127903338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Desain Antena Mikrostrip Rectangular Patch Array 1x2 dengan U-Slot Frekuensi 28 GHz","authors":"Fajar Wahyu Ardianto, Setyawan Renaldy, Farhan Fathir Lanang, T. Yunita","doi":"10.26760/ELKOMIKA.V7I1.43","DOIUrl":"https://doi.org/10.26760/ELKOMIKA.V7I1.43","url":null,"abstract":"ABSTRAKKebutuhan pengguna yang semakin meningkat harus diimbangi dengan peningkatan kecepatan data dan kapasitas suatu jaringan, sehingga diperlukan bandwidth yang lebar. 5G merupakan salah satu teknologi yang akan diresmikan tahun 2020 yang menjadi solusi terhadap peningkatan kecepatan data dan kapasitas layanan. Salah satu kandidat yang menjadi frekuensi kerja 5G yaitu 28 GHz. Antena mikrostrip merupakan salah satu jenis antena yang dapat digunakan untuk teknologi 5G. Namun, antena mikrostrip memiliki beberapa kekurangan, diantaranya bandwidth dan gain yang kecil. Untuk itu, dibutuhkan teknik yang dapat meningkatkan bandwidth dan gain antena. Pada penelitian ini dirancang antena mikrostrip bentuk rectangular patch yang ditambahkan slot berbentuk U dengan tujuan meningkatkan bandwidth dan disusun secara array 1×2 untuk meningkatkan gain antena. Hasil dari simulasi didapatkan antena mampu bekerja pada rentang frekuensi 27,5 GHz – 29,12 GHz pada batas return loss kurang dari -15 dB dengan bandwidth sebesar 1,62 GHz. Nilai gain yang dihasilkan sebesar 7,52 dB. Pola radiasi yang dihasilkan, yaitu unidireksional dan berpolarisasi secara linear.Kata kunci: 5G, 28 GHz, mikrostrip, rectangular patch, array, U-Slot ABSTRACTData rate and network capacity improvements offset the increase of user needs, hence it requires a wider bandwidth. The most current high-end technology, which can solve the problem is 5G. One of the frequency that becomes the candidate of 5G is 28 GHz. For 5G, it could apply one of the antenna types, micro strip antenna. However, micro strip antenna has a shortage of narrow bandwidth and small gain. Therefore, it requires a technique to increase the bandwidth and gain of the antenna. In this study, the form of micro strip of antenna design is a rectangular patch with the addition of U-Slot and arranged 1x2 to increase the bandwidth and antenna gain. The results of the simulation show that the antenna is working well at the range frequency of 27.5 GHz - 29.12 GHz, with a return loss limit of -15 dB with bandwidth of 1.62 GHz, the resulting gain value is 7.52 dB, the resulting radiation pattern is unidirectional and linearly polarized.Keywords: 5G, 28 GHz, microstrip, rectangular patch, array, U-Slot","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114575814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sistem Monitoring pH dan Volume Biogas Digester Dua Tahap menggunakan Mikrokontroler","authors":"Sri Utami, Purwinda Iriani, Yanti Suprianti","doi":"10.26760/elkomika.v7i1.126","DOIUrl":"https://doi.org/10.26760/elkomika.v7i1.126","url":null,"abstract":"ABSTRAKBiogas merupakan salah satu sumber energi terbarukan yang murah dan berkategori non-polusi. Kebutuhan untuk memonitor serta mengontrol plant biogas bertambah seiring kebutuhan mengoptimalkan stabilitas proses untuk mendapatkan performansi yang tinggi. Monitoring biogas dapat memberikan gambaran keseluruhan proses pembangkitan biogas dan digunakan untuk memprediksi proses fermentasi yang berlangsung. Selain itu, dapat pula meminimalkan gagalnya proses fermentasi dan menghasilkan biogas secara optimal. Dalam penelitian ini proses monitoring dilakukan pada digester dua tahap berbahan dasar ampas tahu dan difokuskan pada pH dan volume biogas yang dihasilkan menggunakan dfrobot sku Sen0160 dan YF-S201 serta solenoid valve sebagai aktuatornya. Hasil penelitian menunjukkan bahwa set point pH 5.3 pada digester asetogenesis dapat dicapai pada hari ke enam untuk tiga percobaan. Dalam digester metanogenesis nilai pH dapat dijaga pada pH 7 ±0.3. Jumlah volume biogas tertinggi yang dihasilkan sebesar 97.2 L.Kata kunci: digester dua tahap, fermentasi, asetogenesis, metanogenesis ABSTRACTBiogas is one of an inexpensive and non-pollution renewable energy source. A requirement for optimization and stabilization of biogas plant affected on the need of monitor and control system in the plant. Biogas monitoring system represents a process in biogas generation and has the ability to predict fermentation. In addition, the system built can be used to control the fermentation process and to minimize the failure of the process. This means the process will produce biogas optimally. In this research, the monitoring system was used on two stages digester using tofu as raw material. pH and biogas volume produced are two focuses in this study using SKU Sen0160 dan YF-S201 as sensors and solenoid valve as an actuator. For three experiments data show, set point for pH (5.3) is achieved at day sixth for acetogenesis digester. For methanogenesis, pH can be maintained at 7 ±0.3. The highest volume of biogas produced was 97.2 L.Keywords: two stages digester, fermentation, acetogenesis, methanogenesis digester","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114899335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"QIM - Based Audio Watermarking with Combination Technique of DCT-QR-CPT","authors":"Rendy Dwi Rendragraha, Gelar Budiman, Irma Safitri","doi":"10.26760/ELKOMIKA.V7I1.112","DOIUrl":"https://doi.org/10.26760/ELKOMIKA.V7I1.112","url":null,"abstract":"ABSTRAKAudio watermarking adalah teknik memasukkan informasi ke dalam file audio dan untuk melindungi hak cipta data digital dari distribusi ilegal. Makalah ini memperkenalkan audio stereo watermarking berdasarkan Quantization Index Modulation (QIM) dengan teknik gabungan Discrete Cosine Transform (DCT) - QRCartesian Polar Transform (CPT). Host audio dibagi menjadi beberapa frame, selanjutnya setiap frame ditransformasi oleh DCT, kemudian output DCT diuraikan menjadi matriks orthogonal dan matriks segitiga menggunakan metode QR. Selanjutnya, CPT mengubah dua koefisien kartesian dari matriks segitiga (R) pada posisi (1,1) dan (2,2) menjadi koefisien polar. Setelah itu, penyisipan dilakukan pada koefisien polar oleh QIM. Hasil simulasi menunjukkan bahwa imperseptibilitas audio terwatermark berkualitas baik dengan Signal to Noise Ratio (SNR)> 20, Mean Opinion Score (MOS)> 4 dan tahan terhadap serangan seperti Low Pass Filter (LPF) dan Band Pass Filter (BPF) dengan cut off 25-6k, resampling, Linear Speed Change (LSC) dan MP3 Compression dengan rate diatas 64 kbps.Kata kunci: Audio Watermarking, CPT, DCT, QIM, QR ABSTRACTAudio watermarking is a technique for inserting information into an audio file and to protect the copyright of digital data from illegal distribution. This paper introduces a stereo audio watermarking based on Quantization Index Modulation (QIM) with combined technique Discrete Cosine Transform (DCT) – QR – Cartesian Polar Transform (CPT). Each frame of a host audio is transformed by DCT, then DCT output is decomposed using QR method. Next, CPT transform two cartesian coefficients from triangular matrix (R) in position (1,1) and (2,2) to polar coefficients. After that, embedding is executed on polar coefficients by QIM. The simulation result shows that the imperceptibility is good with Signal to Noise Ratio (SNR)>20, Mean Opinion Score (MOS)>4 and it is robust against attacks such as Low Pass Filter (LPF) and Band Pass Filter (BPF) with cut off 25-6k, Resampling, Linear Speed Change and MP3 Compression with rate 64 kbps and above. Keywords: Audio Watermarking, CPT, DCT, QIM, QR","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"967 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123311829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perancangan dan Optimasi Antena Vivaldi pada Sistem Radar Penembus Permukaan (Ground Penetrating Radar)","authors":"Baso Maruddani, Efri Sandi, Muhammad Fadhil Naufal Salam","doi":"10.26760/elkomika.v7i1.151","DOIUrl":"https://doi.org/10.26760/elkomika.v7i1.151","url":null,"abstract":"ABSTRAKAntena Vivaldi merupakan salah satu jenis antena yang diimplementasikan pada radar penembus permukaan (Ground Penetrating Radar, GPR). GPR adalah salah satu metode non-destructive testing yang biasa digunakan untuk mengetahui kondisi beton/jalan raya. Penelitian ini merancang sebuah antena Vivaldi untuk digunakan pada GPR dengan frekuensi kerja 1 GHz – 2 GHz. Metode yang digunakan untuk merancang dan mengoptimasi antena Vivaldi adalah dengan mengubah beberapa parameter untuk mencapai spesifikasi yang diinginkan. Parameter tersebut antara lain lebar antena, panjang antena dan tapered slot. Optimasi yang dilakukan tetap memperhatikan pola radiasi antena agar tetap terarah. Hasil penelitian ini menghasilkan antena Vivaldi dengan dimensi 350x300 mm dengan return loss di bawah -10 dB pada rentang frekuensi 1 GHz – 2 GHz. Hasil penelitian juga menunjukkan bahwa perubahan nilai parameter lebar antena dan tapered slot menggeser frekuensi kerja antena secara signifikan.Kata kunci: Ground Penetrating Radar, Vivaldi, return loss, parameter antena ABSTRACTThe Vivaldi antenna is one type of antenna that is implemented on Ground Penetrating Radar (GPR). GPR is one of the non-destructive testing methods commonly used to determine the condition of concrete / highway. This studyaim to design a Vivaldi antenna to be used on GPR with a working frequency of 1 GHz - 2 GHz. The method that used to design and optimize Vivaldi antennas is by changing several parameters to achieve the desired specifications. These parameters include antenna width, antenna length and tapered slot. Optimization carried out still observes the radiation pattern of the antenna to keep it directed. The results showed that 350 x 300 mm antennas with return loss below -10 dB in the frequency range of 1 GHz - 2 GHz. The results also show that changes in the parameter width of the antenna and tapered slots shift the antenna working frequency significantly.Keywords: Ground Penetrating Radar, Vivaldi, return loss, antenna parameter","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131975032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Akuisisi Data NMEA 0183 AIS Berbasis Mikrokontroler sebagai Sistem Monitoring Informasi Kapal","authors":"I. Rachman, Ramadani Bima Hammam Nurafalah, Noorman Rinanto","doi":"10.26760/elkomika.v7i1.97","DOIUrl":"https://doi.org/10.26760/elkomika.v7i1.97","url":null,"abstract":"ABSTRAKData kapal dari perangkat AIS (Automatic Identification System) merupakan sumber informasi bagi nahkoda kapal laut. Informasi-informasi tersebut diperoleh dengan mengubah menu secara manual pada layar AIS yang berukuran kecil. Pembuatan perangkat pada penelitian ini difungsikan sebagai pendukung kinerja AIS dalam penyampaian informasi secara berkelanjutan dan otomatis. Data NMEA (National Marine Electronics Association) 0183 dari AIS MA-500TR diakuisisi melalui proses penafsiran, pemilihan, penguraian dan pengurutan untuk menghasilkan data RMC (Recommended Minimum Specific) menggunakan bahasa C pada Arduino Uno R3. Kesesuaian tampilan data RMC untuk waktu, posisi dan tanggal pada modul LED P10 dengan AIS MA-500TR sebesar 100 %. Sedangkan tampilan untuk kecepatan dan heading pada modul LED P10 memiliki akurasi lebih tinggi daripada AIS MA-500TR karena mampu menampilkan dua digit angka setelah tanda koma.Kata kunci: kapal, AIS, informasi, NMEA 0183, akuisisi ABSTRACTShip’s data from the AIS (Automatic Identification System) device is a source of information for the shipmaster. That information is obtained by manually changing the menu on the small size of the AIS screen. The prototype in this study is used to support AIS performance in order to get information continuously and automatically. NMEA (National Marine Electronics Association) 0183 data from the AIS MA-500TR was acquired through the process of interpretation, filtering, parsing and sorting to generate RMC (Recommended Minimum Specific) data using C language on the Arduino Uno R3. The accuracy of RMC data display for time, position and date on the LED P10 module with the AIS MA-500TR are 100 %. While the display for speed and heading on the LED P10 module has a higher accuracy than the AIS MA-500TR because it is able to display two-digit numbers after a comma.Keywords: ship, AIS, information, NMEA 0183, acquisition","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127501856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Smart Monitoring System Using Raspberry-Pi and Smartphone","authors":"E. Surya, Y. K. Ningsih","doi":"10.26760/ELKOMIKA.V7I1.72","DOIUrl":"https://doi.org/10.26760/ELKOMIKA.V7I1.72","url":null,"abstract":"ABSTRAK Sistem monitoring adalah hal yang sangat penting dan harus dimiliki oleh setiap pemilik rumah. Sehingga diperlukan alat untuk dapat mengawasi rumah secara real-time. Perancangan sistem menggunakan Raspberry-Pi sebagai pusat komputasi dan menggunakan smartphone berbasis android untuk melakukan monitoring. Sistem ini dilengkapi dengan beberapa fitur diantaranya pergerakan kamera secara horisontal dan vertikal menggunakan motor servo, sistem recording video yang dapat dikendalikan oleh user, serta sistem deteksi gerakan yang dapat menjadi alert untuk pengguna. Pengujian sistem dilakukan dengan cara melakukan pengujian network dilihat dari parameter bandwidth dan jumlah client dalam suatu jaringan untuk mendapatkan suatu sistem monitoring yang real-time, reliable dan smart. Dalam hasil pengujian dengan maksimum 2 klien dalam 1 network, sistem  dapat menangkap rata-rata 10.7 frames per second, serta memiliki respon  pergerakan kamera < 1 second. Pengujian fitur perekaman dan motion detection juga berfungsi dengan baik, sehingga sistem monitoring ini menjadi sistem yang smart dan reliable. Kata kunci: Real-time, Rasberry-Pi, Smart Monitoring. ABSTRACT The monitoring system is very important and must be owned by every homeowner. Therefore, it needed some tools to be self-sufficient in real-time. The design of the system using Raspberry-Pi as a computing center and use an Android smartphone to perform monitoring. Equipped with a servo motor, a user-controlled video recording system, and a motion detection system that can generate alert to the user. Testing is done by doing network testing seen from the bandwidth parameters and number of clients in a network for a real-time, reliable and smart monitoring system. In the test results with maximum 2 clients in a network, the system can capture an average of 10.7 frames per second and has a camera movement response of <1 sec. Testing of the recording and motion detection feature also works well, so the monitoring system becomes a smart and reliable system. Keywords: Real-time, Rasberry-Pi, Smart Monitoring.","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124697289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}