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DIGITAL DETECTION SYSTEM DESIGN OF MYCOBACTERIUM TUBERCULOSIS THROUGH EXTRACTION OF SPUTUM IMAGE USING NEURAL NETWORK METHOD Arisgraha, Franky; Widiyanti, Prihartini; Apsari, Retna
Indonesian Journal of Tropical and Infectious Disease Vol 3, No 1 (2012)
Publisher : Institute of Topical Disease

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (154.924 KB)

Abstract

Tuberculosis (TBC) is an dangerous disease and many people has been infected. One of many important steps to control TBC effectively and efficiently is by increasing case finding using right method and accurate diagnostic. One of them is to detect Mycobacterium Tuberculosis inside sputum. Conventional detection of Mycobacterium Tuberculosis inside sputum can need a lot of time, so digitallydetection method of Mycobacterium Tuberculosis was designed as an effort to get better result of detection. This method was designed by using combination between digital image processing method and Neural Network method. From testing report that was done, Mycobacterium can be detected with successful value reach 77.5% and training error less than 5%.
BRADYCARDIA AND TACHYCARDIA DETECTION SYSTEM WITH ARTIFICIAL NEURAL NETWORK METHOD S, Delima Ayu; Arisgraha, Franky; Apsari, Retna
Indonesian Journal of Tropical and Infectious Disease Vol 3, No 2 (2012)
Publisher : Institute of Topical Disease

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (546.931 KB)

Abstract

Heart disease is one disease with high mortality rate in the world. Based on WHO records from 112 countries at 2004, the rate is 29% of all deaths each year. Medical devices are necessary to diagnose ones health as an indication of a disease. Nowadays, Indonesia still imports medical devices, for the diagnosis of heart failure, from abroad. This research aims to assist the monitoring of cardiac patients with bradycardia and tachycardia appearances of message condition patient’s heart rate at the same time. The results were displayed with the output of bradycardia condition of the heart rate (heart rate less than 60 beats per minute) or tachycardia (heart rate over 100 beats per minute). The system displayed the data read from the heart to the PC embedded system to monitor the condition of the patients under decisions based on backpropagation neural network. Classification system could be performed quite well, training data and by testing the 10 pieces, the optimal weight gain was 1727 iteration, the learning rate was 0.1122, and the error was below 0.001 (0.0009997).
Pemanfaatan Sensor CCD dan Interferometer Michelson untuk Menentukan Koefisien Difusi Larutan Transparan Apsari, Retna; Trisnaningsih, Trisnaningsih; Salamah, Umi
Jurnal Fisika dan Aplikasinya Vol 4, No 1 (2008)
Publisher : Jurnal Fisika dan Aplikasinya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (117.865 KB) | DOI: 10.12962/j24604682.v4i1.945

Abstract

Telah dilakukan penelitian untuk menentukan nilai koefisien difusi larutan transparan ammonium dihidrogen phosphate (NH4)H2PO4 menggunakan interferometer Michelson. Perubahan rumbai pada waktu-waktu tertentu diakibatkan oleh perbedaan beda lintasan optis karena perbedaan konsentrasi larutan yang diamati dengan sensor CCD (kamera digital). Perbedaan lintasan optis dihitung dengan mengukur jarak dua pusat rumbai pada waktu yang berbeda. Nilai koefisien difusi yang dihasilkan untuk konsentrasi 0,4981; 0,7469; 0,9959;1,5471; 1,9907 gmol/ℓ masing-masing sebesar (8,66 ± 0,03).10−6; (8,09 ± 0,07).10−6; (7,28 ± 0,10).10−6; (6,70 ± 0,06).10−6; (5,57 ± 0,01).10−6 cm2/s. Hasil penelitian menunjukkan bahwa sensor CCD kamera dapat digunakan untuk mengamati perubahan rumbai yang menunjukkan perbedaan beda lintasan optis. Interferometer Michelson dapat digunakan untuk menentukan nilai koefisien difusi larutan transparan dan hasilnya sesuai literatur.
In vitro effect of Q-switched Nd:YAG laser exposure on morphology, hydroxyapatite composition and microhardness properties of human dentin Apsari, Retna; Siswanto, Siswanto; Yuliati, Anita; Bidin, Noriah
Dental Journal (Majalah Kedokteran Gigi) Vol 44, No 4 (2011): (December 2011)
Publisher : Faculty of Dental Medicine, Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/j.djmkg.v44.i4.p181-186

Abstract

Background: A Q-switched Nd:YAG laser was employed as a source of ablation. The fundamental wavelength of the laser is 1064 nm, with pulse duration of 8 nanosecond operates with uniphase mode of TEM00. In the following experiments, dentin samples (without caries and plaque) are exposed to pulse laser with Q-switching effect at various energy dose. Purpose: The aim of this study was to investigate the effect of laser ablation on dentin samples using Q-switched Nd:YAG laser exposure. Methods: The laser was operated in repetitive mode with frequency of 10 Hz. The energy dose of the laser was ranging from 13.9 J/cm2, 21.2 J/cm2 and 41.7 J/cm2. The target material comprised of human dentin. The laser was exposed in one mode with Q-switched Nd:YAG laser. Energy delivered to the target through free beam technique. The exposed human dentin was examined by using x-ray diffraction (XRD) and fluoresence scanning electron microscopy for energy dispersive (FESEM-EDAX). Microhardness of human dentin were examined by using microhardness vickers test (MVT). Results: The result obtained showed that the composition of hydroxyapatite of the dentin after exposed by Q-switched Nd:YAG laser are 75.02% to 78.21%, with microhardness of 38.7 kgf/mm2 to 86.6 kgf/mm2. This indicated that exposed pulsed Nd:YAG laser on the human dentin attributed to the phototermal effect. The power density created by the Q-switched Nd:YAG laser enables the heat to produce optical breakdown (melting and hole) associated with plasma formation and shock wave propagation, from energy dose of 21.2 J/cm2. From XRD analysis showed that the exposure of Nd:YAG laser did not involve in changing the crystal structure of the dentin, but due to photoablation effect. Conclusion: In conclusion, the application of Q-switched Nd:YAG laser as contactless drills in dentistry should be regarded as an alternative to the classical mechanical technique to improve the quality of the dentin treatment.Latar belakang: Mode Q-Switch pada laser Nd:YAG dapat menghasilkan fenomena ablasi pada dentin. Laser Nd:YAG yang digunakan mempunyai panjang gelombang 1064 nm, durasi pulsa 8 ns beroperasi dengan mode TEM00. Sampel dentin yang digunakan tanpa karies dan plak, yang dipapari laser dengan mode Q-switch dalam berbagai variasi dosis energi. Tujuan: Tujuan penelitian ini adalah mengamati efek ablasi dentin secara in vitro akibat paparan laser Nd:YAG Q-switch dengan pengamatan morfologi permukaan, komposisi hidroksiapatit, dan uji kekerasan mikro. Metode: Laser Nd:YAG Q-switch dengan frekuensi 10 Hz dan variasi dosis energi 13,9 J/cm2, 21,2 J/cm2 dan 41,7 J/cm2 ditembakkan pada sampel dentin manusia dengan teknik penyinaran bebas tanpa dilewatkan serat optik. Dentin yang terbuka diamati menggunakan x-ray diffraction (XRD) dan fluoresence scanning electron microscopy for energy dispersive (FESEM-EDAX). Kekerasan mikro dari dentin juga diamati menggunakan microhardness vickers test (MVT). Hasil: Hasil penelitian menunjukkan bahwa komposisi hidroksiapatit dari dentin setelah paparan laser Nd:YAG Q-Switch menunjukkan peningkatan berkisar 75,02% sampai 78,21% dibandingkan normal, dengan kekerasan mikro berkisar 38,7 kgf/mm2 sampai 86,6 kgf/mm2. Perubahan pada struktur mikro tersebut disebakan karena adanya efek fototermal. Kerapatan daya yang bervariasi berdasarkan variasi dosis energi menyebabkan efek panas pada dentin yang menyebabkan adanya fenomena optical breakdown, yang ditandai dengan munculnya efek leleh dan lubang pada sampel karena produksi plasma dan adanya gelombang kejut, mulai dosis 21,2 J/cm2. Berdasarkan uji XRD, efek yang muncul pada dentin tidak menyebabkan terjadinya perubahan struktur kristal hidroksiapatit, tetapi menyebabkan perubahan komposisi hidroksiapatit yang disebut dengan fotoablasi. Kesimpulan: Dapat disimpulkan bahwa penggunaan mode Q-switched pada laser Nd:YAG sebagai alat dengan kontak minimal dapat dijadikan teknik alternatif untuk meningkatkan kualitas perawatan dental.
Perubahan warna semen ionomer kaca setelah direndam dalam larutan teh hitam Wardhani, Wahyu Puri; Meizarini, Asti; Yuliati, Anita; Apsari, Retna
Journal of Dentomaxillofacial Science Vol 9, No 2 (2010): Formerly Jurnal Dentofasial ISSN 1412-8926
Publisher : DiscoverSys Inc

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15562/jdmfs.v9i2.242

Abstract

Microporosity in glass ionomer cement contributes on its colour stability. In oralcavity GIC interacts with saliva, foods, drinks, and the oral hygiene condition whichcould affect in colour stability. This study aimed to examine the colour change in GICafter immersion in black tea solution. Twenty eight disc specimens (6 mm diameterand 1 mm thickness). The colour measurements were recorded after storage in closedtube for 24 hours. Specimens were randomly devided into 4 groups of 7 specimens.Control specimens were kept in saline solution. The other 3 groups were immersed inblack tea solution for 5 minutes respectively for 5, 7, and 14 times, followed by colourchange measurement. Data were submitted to one-way ANOVA and LSD. There wassignificant colour change in GIC after immersion in black tea. The conclusion islonger GIC immersed in black tea lower the intensity. The lowest intensity changingwas the immersed for 5 minutes, 14 times daily.
DIGITAL DETECTION SYSTEM DESIGN OF MYCOBACTERIUM TUBERCULOSIS THROUGH EXTRACTION OF SPUTUM IMAGE USING NEURAL NETWORK METHOD Arisgraha, Franky; Widiyanti, Prihartini; Apsari, Retna
Indonesian Journal of Tropical and Infectious Disease Vol 3, No 1 (2012)
Publisher : Institute of Topical Disease

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (154.924 KB) | DOI: 10.20473/ijtid.v3i1.200

Abstract

Tuberculosis (TBC) is an dangerous disease and many people has been infected. One of many important steps to control TBC effectively and efficiently is by increasing case finding using right method and accurate diagnostic. One of them is to detect Mycobacterium Tuberculosis inside sputum. Conventional detection of Mycobacterium Tuberculosis inside sputum can need a lot of time, so digitallydetection method of Mycobacterium Tuberculosis was designed as an effort to get better result of detection. This method was designed by using combination between digital image processing method and Neural Network method. From testing report that was done, Mycobacterium can be detected with successful value reach 77.5% and training error less than 5%.
BRADYCARDIA AND TACHYCARDIA DETECTION SYSTEM WITH ARTIFICIAL NEURAL NETWORK METHOD S, Delima Ayu; Arisgraha, Franky; Apsari, Retna
Indonesian Journal of Tropical and Infectious Disease Vol 3, No 2 (2012)
Publisher : Institute of Topical Disease

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (546.931 KB) | DOI: 10.20473/ijtid.v3i2.206

Abstract

Heart disease is one disease with high mortality rate in the world. Based on WHO records from 112 countries at 2004, the rate is 29% of all deaths each year. Medical devices are necessary to diagnose ones health as an indication of a disease. Nowadays, Indonesia still imports medical devices, for the diagnosis of heart failure, from abroad. This research aims to assist the monitoring of cardiac patients with bradycardia and tachycardia appearances of message condition patient’s heart rate at the same time. The results were displayed with the output of bradycardia condition of the heart rate (heart rate less than 60 beats per minute) or tachycardia (heart rate over 100 beats per minute). The system displayed the data read from the heart to the PC embedded system to monitor the condition of the patients under decisions based on backpropagation neural network. Classification system could be performed quite well, training data and by testing the 10 pieces, the optimal weight gain was 1727 iteration, the learning rate was 0.1122, and the error was below 0.001 (0.0009997).
Fotodinamik Inaktivasi Laser Diode Pada Bakteri Staphylococcus aureus Dengan Endogen Porfirin Secara In Vitro Astuti, Suryani Dyah; Widya, Indira Wastu; Apsari, Retna
Jurnal Biosains Pascasarjana Vol 19, No 3 (2017)
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/bsn.v19i3.Y2017.8763

Abstract

Penelitian ini dilakukan untuk mengetahui pengaruh fotodinamik inaktivasi pemaparan dosis laser diode biru 405nm terhadap kematian bakteri staphylococcus aureus secara in vitro dengan menggunakan endogen fotosensitizer guna mengetahui dosis yang optimum untuk fotoinaktivasi bakteri. Dosis energi yang dipaparkan berkisar antara 31,740 - 71,415. Pemaparan laser menghasilkan persentase kematian bakteri tertinggi sebesar 55,22% pada dosis energi 63,480  dan mengalami penurunan pesentase kematian pada dosis diatas 63,480. Berdasarkan hasil penelitian tersebut, dapat disimpulkan bahwa pemaparan dosis energy laser diode biru berpotensi untuk menginaktivasi bakteri staphylococcus aureus sehingga dapat digunakan sebagai kandidat terapi fotodinamik.Kata kunci - Fotoinaktivasi, Laser dioda, Endogen porfirin, Staphylococcus aureus,