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INDONESIA
Jurnal INKOM
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Computer Science & IT
Arjuna Subject : -
Articles 16 Documents
 1   2 
Search results for , issue "Vol 7, No 2 (2013)" : 16 Documents clear
Exciter Jammer Berbasis Direct Digital Synthesizer Suardja, Elan Djaelani; Adhi, Purwoko
INKOM Journal Vol 7, No 2 (2013)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (11946.215 KB) | DOI: 10.14203/j.inkom.257

Abstract

In this paper, we propose a radio transmitter jamming device modification developed. The transmitter is built by replacing Voltage Controled Oscillator (VCO) with modules for Direct Digital Synthesizer (DDS) as an exciter. Advantages of DDS is programmed with a computer and can produce a signal with a frequency stability and frequency accuracy is very high. The use of DDS allow setting the frequency of central and deviation with very easily using software. In addition, the period or sweep time designed to use only software can be reprogrammed with DDS to function on a Linear Sweep No Dwell mode and signaltrigger with a period equal to the period the minimum desired sweep. DDS allows to generate a signal jamming by narrow BW, so the power output of the Jammer could be higher and increased outreach of radio jamming. Another advantage with theuse of DDS is the dimension transmitter Jammer becomes smaller.keywords: Jamming devices, DDS, Eletronics warfare Pada tulisan ini, modifikasi perangkat pemancar radio jamming diusulkan, dengan mengganti Voltage Controled Oscilator (VCO) dengan modul Direct Digital Synthesizer (DDS) sebagai exciter. Kelebihan DDS adalah bisa diprogram dengan komputer dan menghasilkan sinyal dengan stabilitas dan akurasi frekuensi yang sangat tinggi. Penggunaan DDS memungkinkan pengaturan frekuensi tengah dan deviasi dengan sangat mudah menggunakan sofware. Di samping itu, periode atau waktu sweep dirancang untuk bisa diatur hanya menggunakan software dengan memprogram DDS untuk berfungsi pada mode Linear Sweep No Dwell dan memberikan sinyal trigger dengan periode sebesar periode sweep minimum yang diinginkan. DDS memungkinkan untuk menghasilkan sinyal jamming dengn BW yang sempit, sehingga power output Jammer bisa lebih tinggi dan daya jangkau radio jamming meningkat. Keuntungan lain dengan penggunaan DDS adalah dimensi pemancar Jammer menjadi lebih kecil.kata kunci: Perangkat Jamming, DDS, Perang elektronik
Alternative of Pothole Area Measurement Based-on Video using Threshold-based Marking and GLCM Idestio, Barsyah Dwi; Wirayuda, Tjokorda Agung Budi
INKOM Journal Vol 7, No 2 (2013)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1603.033 KB) | DOI: 10.14203/j.inkom.235

Abstract

One  obstacle  that  causes  the  slow  progress  of  road repairment  is  the  measurement  of  the  pothole  area.  In  this  process, calculation of area in each pothole is done. Measurement process nowadays is manually performed by using a conventional tool (such as roll meter) with the help of human entirely. This research objective is to develop the system for detecting and measuring pothole area, by implementing the threshold-base marking and GLCM method in asphalt surface video. The system consists of two stages starting with candidate pothole detection using threshold-based marking then continued by classification process based on feature vector obtained through the GLCM. The results show that the accuracy rate of 91.67% system with a time of 0.08 seconds to process each frame.keywords: Pothole, Image detection, GLCMSalah satu kendala yang menyebabkan lambatnya perbaikan jalan yaitu pada proses pengukuran kerusakan jalan. Pada proses ini, dilakukan penghitungan luas tiap-tiap kerusakan. Proses pengukuran saat ini dilakukan secara manual menggunakan alat ukur sederhana (roll meter) dengan bantuan tenaga manusia sepenuhnya. Pada penelitian ini dikembangkan suatu sistem deteksi dan pengukuran kerusakan jalan khususnya lubang, berbasis data video, dengan menerapkan threshold-based marking dan GLCM. Sistem terdiri atas 2 tahapan, dimulai dengan mendeteksi kemungkinan area lubang  menggunakan threshold-based marking dilanjutkan dengan klasifikasi berdasarkan vektor ciri yang diperoleh melalui GLCM. Hasil pengujian menunjukkan bahwa tingkat akurasi sistem sebesar 91.67% dengan waktu proses 0,08 detik untuk setiap frame.kata kunci: Lubang jalan, Deteksi citra, GLCM
Automated Estimation Parasitemia of Plasmodium berghei Infected Mice using CellProfiler Software Ramadhani, Dwi; Nurhayati, Siti
INKOM Journal Vol 7, No 2 (2013)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/j.inkom.263

Abstract

In this paper, we propose a technique for automatically recording parasitemia of mice infected with Plasmodium berghei by using Cellprofiler. Our purpose is to identify the difference number of parasitemia obtained by CellProfiler and manual assessment. We conducted a T-test analysis with p < 0.05. This value is considered to have a statistically significant different between automatic and manual process. Total of 50 thin blood smear images were analyzed for both automatically using CellProfiler and manual process. Results showed that there were insignificant difference between automatic and manual process (p > 0.05). It can be concluded that based on this research that automated quantification of parasitemia using CellProfiler was comparable but not better than manual.keywords: Automation, CellProfiler, Parasitemia, Plasmodium berghei, Thin blood smearPada tulisan ini, penghitungan parasitemia pada mencit yang diinfeksi dengan Plasmodium berghei dengan CellProfiler diusulkan. Tujuan penelitian yang dilakukan adalah untuk mengetahui apakah terdapat perbedaan antara nilai parasitemia yang diperoleh dengan menggunakan CellProfiler dibandingkan dengan secara manual. Uji T digunakan untuk analisis statistik dengan p < 0, 05 berarti terdapat perbedaan yang signifikan antara penghitungan otomatis dibandingkan dengan manual. Total sebanyak lima puluh citra apusan darah tipis mencit dianalisis secara otomatis menggunakan CellProfiler dan secara manual. Hasil penelitian menunjukkan bahwa tidak terdapat perbedaan signifikan antara nilai persentase yang diperoleh secara otomatis dibandingkan dengan manual (p > 0, 05) . Dengan demikian dapat disimpulkan bahwa nilai persentase parasitemia yang diperoleh secara otomatis menggunakan CellProfiler sebanding tetapi tidak lebih baik dibandingkan dengan teknik manual.kata kunci: CellProfiler, Otomatisasi, Parasitemia, Plasmodium berghei, Preparat Apusan Tipis
Junal INKOM Vol 7 No 2, 2014 Editor, Kepala
INKOM Journal Vol 7, No 2 (2013)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (21731.477 KB) | DOI: 10.14203/j.inkom.471

Abstract

Rancang Bangun Smart Lamp Ramdan, Ade; Prajitno, Dicky Rianto; Herlan, Herlan; Gojali, Elli Ahmad
INKOM Journal Vol 7, No 2 (2013)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3357.255 KB) | DOI: 10.14203/j.inkom.240

Abstract

In this paper, we propose a LED-based smart lamp prototype that integrated with sensor. The smart lamp use information of people and lighting confirmation, to turn on or turn off the lamp automatically. In addition, the sensor calculates and balances flash and ambient light exposure to decrease the light, so that can make energy efficiently in use. PIR (Passive Infrared Receiver) and Ultrasonic sensor is preferred to detect people condition in one place and LDR (Light Dependent Resistant) is preferred to detect intensity of light. In experimental system of smart lamp obtain good condition where the average of illuminance 257,6 lux. The smart lamp can detect large and small movements caused by human beings and can provide a constant room lighting.keywords: Smart lamp, Presence detection, Ultrasonic Pada tulisan ini, sebuah lampu pintar berbasis LED berbasis integrasi sensor deteksi keberadaan dan sensor deteksi cahaya diusulkan. Sensor digunakan untuk menyalakan atau memadamkan lampu secara otomatis berdasarkan keberadaan orang disekitarnya. Selain itu, lampu pintar juga dapat mengatur tingkat pencahayaan yang dibutuhkan  dengan memperhatikan cahaya ambien untuk mencegah terjadinya pencahayaan yang berlebih guna menghindari energi yang terbuang sia-sia. Deteksi keberadaan menggunakan penggabungan dua buah sensor yaitu PIR (Passive Infrared Receiver)  dan Ultrasonik, sedangkan deteksi cahaya menggunakan sensor LDR (Light Dependent Resistant). Hasil pengujian mendapatkan sistem lampu penerangan bekerja dengan baik dan dapat memberikan pencahayaan sebesar 257,6 lux. Lampu Pintar tersebut sudah dapat mendeteksi gerakan besar dan kecil yang ditimbulkan oleh manusia dan dapat memberikan pencahayaan ruangan yang konstan.kata kunci: Lampu pintar, Deteksi keberadaan, Ultrasonik
Frontmatters Sadikin, Rifki
INKOM Journal Vol 7, No 2 (2013)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (146.476 KB) | DOI: 10.14203/j.inkom.387

Abstract

Purwarupa Modem Audio Berbasis Mikrokontroler dengan Teknik Direct Digital Synthesizer dan Zero Crossing Detector Basuki, Akbari Indra; Mahendra, Oka
INKOM Journal Vol 7, No 2 (2013)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (891.42 KB) | DOI: 10.14203/j.inkom.252

Abstract

A microcontroller based audio modem system by means of Digital Direct Synthesizer (DDS) and Zero Crossing Detector (ZCD) technique is proposed in this paper. The modem operates in audible frequency range. The function of this modem is to transmit digital data through analog audio channel. In the modulator, DDS is used to generate sinusoidal audio signal. The modulation technique is 16-tones M-Ary Frequency Shift Keying (M-FSK) or MFSK16. In the demodulator, ZCD technique is used to measure the  sinusoidal signal periods. The experiments were done in the physical layer, to analyze the optimal channel bandwidth, transfer rate, and Bit Error Rate (BER). It was found that the optimal channel bandwidth for each tone is proportional to the frequency, due to fixed error DDS calculation. The performances of the modem are capable to modulatedata in transfer rate 200 bps and BER 2x10−3 without channel coding improvement.keywords: Audio modem, DDS, M-FSK, Zero Crossing Detector, GSMSistem modem audio berbasis mikrokontroler dengan teknik Direct Digital Synthesizer (DDS) dan Zero Crossing Detector (ZCD) diusulkan pada tulisan ini. Modem ini beroperasi pada frekuensi suara audible. Modem ini berfungsi untuk melewatkan data digital melalui kanal audio analog. Pada sisi modulator, digunakan teknik DDS untuk menghasilkan gelombang sinus audio. Teknik modulasi yang digunakan adalah 16 tone M-Ary Frequency Shift Keying (M-FSK) atau MFSK16. Pada sisi demodulator, teknik ZCD digunakan untuk mengukur perioda gelombang sinus. Pengujian dilakukan pada layer fisik modem dengan mencari lebar kanal yang optimal untuk masing-masing tone, nilai transfer rate, dan nilai Bit Error Rate (BER). Hasil pengujian menunjukkan lebar kanal optimal untuk masing-masing tone berbanding lurus dengan besar frekuensi, karena errorperhitungan frekuensi oleh DDS bersifat tetap. Performansi modem mencapai nilai transfer rate 200 bps dengan BER 2x10−3, tanpa penambahan pengkodean kanal.kata kunci: Modem audio, DDS, M-FSK, Zero Crossing Detector, GSM
Design Of Mini ECG for High Mobility Athlete Hadiyoso, Sugondo; Rizal, Achmad; Usman, Koredianto; Sigit, Radian
INKOM Journal Vol 7, No 2 (2013)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/j.inkom.255

Abstract

Electrocardiogram (ECG) is a biopotential signal which generated by electrical activity of the heart muscle cells. ECG is taken by placing electrodes at a certain point a person’s body. This research propose a wearable ECG device. This device can be used to monitor athlete’s heart condition. ECG device is designed in small size that can be put on the waist with a mini LCD to view ECG signal graph. The ECG system used 3 lead’s configuration based on modified Einthoven triangle method then called modified chest lead. Electrodes that placed on the body, taking electrical signal activity of the heart then the signal is amplified and filtered by signal conditioning. By Analog to Digital Converter signals are converted into digital data then the microcontroller reads data from ADC and displays graphs of signal and heart rate on the Nokia 5110s LCD screen.keywords: Electrocardiogram, Biomedik, Einthoven, ADC, Nokia 5110Electrocardiogram (ECG) merupakan suatu sinyal biopotensial hasil dari aktivitas listrik sel otot jantung. ECG diambil dengan memasang elektroda pada titik tertentu tubuh seseorang. Pada tulisan ini, diusulkan sebuah perangkat ECG digital yang dapat digunakan untuk memonitor kondisi jantung seorang atlit. ECG yang dirancang memiliki ukuran kecil yang dapat diletakkan pada pinggang dengan mini LCD sebagai penampil grafik sinyal ECG. Sistem ECG yang digunakan adalah 3 lead menggunakan metode segitiga Einthoven dengan memodifikasi titik penempatan elektroda yang disebut modifikasi chest lead. Elektroda yang terpasang pada tubuh, melakukan sadapan sinyal listrik jantung kemudian oleh pengkondisi sinyal dilakukan penguatan dan filter. Oleh Analog to Digital Converter sinyal tersebut diubah menjadi data digital selanjutnya mikrokontroler membaca data ADC dan menampilkan grafik sinyal berikut heart rate pada layar LCD Nokia 5110.kata kunci: Electrocardiogram, biomedic, Einthoven, ADC, Nokia 5110
Alternative of Pothole Area Measurement Based-on Video using Threshold-based Marking and GLCM Barsyah Dwi Idestio; Tjokorda Agung Budi Wirayuda
INKOM Journal Vol 7, No 2 (2013)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/j.inkom.235

Abstract

Road as one transport infrastructure has become the lifeblood of society which has an important role in development of state and nation. Indonesia today has around 3.800 kilometers of damaged roads, or about 10 percent of the total length of nation roads. One obstacle that causes the slow progress of road repairment is the measurement of the pothole area. In this process, calculation of area in each pothole is done. Measurement process nowadays is manually done by using a conventional tool (such as roll meter) with the help of human entirely. This research is trying to develop the system for detecting and measuring pothole area, by implementing the threshold-base marking and GLCM method in asphalt surface video.Based on Christian Koch and Loannis Brilakis, threshold-based method is able to do the segmentation and marking the possibility of pothole in asphalt surface video frame. Based on Mark Nixon and Aguado Alberto, gray level co-occurrence matrix has a good performance to extracting the texture in order to distinguish the texture of pothole and normal surface. Combination of both methods could be an alternative for measurement of pothole area in the process of road repairment in Indonesia.
Automated Estimation Parasitemia of Plasmodium berghei Infected Mice using CellProfiler Software Dwi Ramadhani; Siti Nurhayati
INKOM Journal Vol 7, No 2 (2013)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/j.inkom.263

Abstract

In this paper, we propose a technique for automatically recording parasitemia of mice infected with Plasmodium berghei by using Cellprofiler. Our purpose is to identify the difference number of parasitemia obtained by CellProfiler and manual assessment. We conducted a T-test analysis with p < 0.05. This value is considered to have a statistically significant different between automatic and manual process. Total of 50 thin blood smear images were analyzed for both automatically using CellProfiler and manual process. Results showed that there were insignificant difference between automatic and manual process (p > 0.05). It can be concluded that based on this research that automated quantification of parasitemia using CellProfiler was comparable but not better than manual.keywords: Automation, CellProfiler, Parasitemia, Plasmodium berghei, Thin blood smearPada tulisan ini, penghitungan parasitemia pada mencit yang diinfeksi dengan Plasmodium berghei dengan CellProfiler diusulkan. Tujuan penelitian yang dilakukan adalah untuk mengetahui apakah terdapat perbedaan antara nilai parasitemia yang diperoleh dengan menggunakan CellProfiler dibandingkan dengan secara manual. Uji T digunakan untuk analisis statistik dengan p < 0, 05 berarti terdapat perbedaan yang signifikan antara penghitungan otomatis dibandingkan dengan manual. Total sebanyak lima puluh citra apusan darah tipis mencit dianalisis secara otomatis menggunakan CellProfiler dan secara manual. Hasil penelitian menunjukkan bahwa tidak terdapat perbedaan signifikan antara nilai persentase yang diperoleh secara otomatis dibandingkan dengan manual (p > 0, 05) . Dengan demikian dapat disimpulkan bahwa nilai persentase parasitemia yang diperoleh secara otomatis menggunakan CellProfiler sebanding tetapi tidak lebih baik dibandingkan dengan teknik manual.kata kunci: CellProfiler, Otomatisasi, Parasitemia, Plasmodium berghei, Preparat Apusan Tipis

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