Tri Anggono Prijo, Tri Anggono
Department of Physics, Faculty of Science and Technology, Universitas Airlangga, Surabaya, Indonesia

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OPTIMATION OF 48 kHz ULTRASONIC WAVE DOSE FOR THE INACTIVATION OF Salmonella typhi Lestari, Dwi May; Prijo, Tri Anggono; Astuti, Suryani Dyah
Indonesian Journal of Tropical and Infectious Disease Vol 5, No 4 (2014)
Publisher : Institute of Topical Disease

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (28.114 KB)

Abstract

This study was aimed to determine the effect of ultrasonic dose exposure which could decrease the viability of Salmonella typhi by using the variation of exposure time (15, 20, 25, and 30 minutes) and volume of bacterial suspension (2, 4, 6, and 8 ml) at constant power. The sample used was Salmonella typhi. Ultrasonic wave transmitter was a piezoelectric tweeter with 0,191 watts of power and 48 kHz frequency generated by the signal generator. Piezoelectric tweeter was a kind of transducer which converted electrical energy into ultrasonic energy. This research was an experimental laboratory with a completely randomized design. The decrease of bacterial percentage was calculated by using TPC (Total Plate Count). Data were analyzed by using One Way Anova. The results showed that the variation of exposure time and volume of bacterial suspension gave significant effect on the percentage of Salmonella typhi kill. The most optimal of ultrasonic dose exposure to kill Salmonella typhi was 281.87 J/ml with 100% bacterial kill.
OPTIMATION OF 48 kHz ULTRASONIC WAVE DOSE FOR THE INACTIVATION OF Salmonella typhi Lestari, Dwi May; Prijo, Tri Anggono; Astuti, Suryani Dyah
Indonesian Journal of Tropical and Infectious Disease Vol 5, No 4 (2015)
Publisher : Institute of Topical Disease

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (474.592 KB) | DOI: 10.20473/ijtid.v5i4.2006

Abstract

This study was aimed to determine the effect of ultrasonic dose exposure which could decrease the viability of Salmonella typhi by using the variation of exposure time (15, 20, 25, and 30 minutes) and volume of bacterial suspension (2, 4, 6, and 8 ml) at constant power. The sample used was Salmonella typhi. Ultrasonic wave transmitter was a piezoelectric tweeter with 0,191 watts of power and 48 kHz frequency generated by the signal generator. Piezoelectric tweeter was a kind of transducer which converted electrical energy into ultrasonic energy. This research was an experimental laboratory with a completely randomized design. The decrease of bacterial percentage was calculated by using TPC (Total Plate Count). Data were analyzed by using One Way Anova. The results showed that the variation of exposure time and volume of bacterial suspension gave significant effect on the percentage of Salmonella typhi kill. The most optimal of ultrasonic dose exposure to kill Salmonella typhi was 281.87 J/ml with 100% bacterial kill.
Optimalisasi Citra Axial Sequence T2 Gradient Echo Dengan Variasi Bandwidth Dan Time Echo Pada MRI Shoulder Untuk Mengurangi Susceptibility Artifacts Dan Chemical Shift Muzamil, Akhmad; Indri, Nur Vita; Astuti, Suryani Dyah; Prijo, Tri Anggono
Journal of Health Vol 5 No 2 (2018): Journal of Health - July 2018
Publisher : LPPM STIKES Guna Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1224.753 KB) | DOI: 10.30590/vol5-no2-p40-49

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh Bandwidth (BW) dan Time Echo (TE) pada MRI Shoulder serta mengetahui nilai variasi Bandwidth dan Time Echo yang optimal untuk mengurangi Susceptibility Artifacts dan Chemical Shift. Penelitian ini di lakukan di Rumah Sakit Umum Haji Surabaya dengan menggunakan Pesawat MRI 1,5 Tesla. Penelitian ini  menggunakan varaisi Bandwidth 170 Hz/Px, 190 Hz/Px dan 210 Hz/Px serta menggunakan variasi TE 16 ms dan 20 ms pada pembobotan T2 Medic potongan axial terhadap 4 pasien. Analisa data dilakukan secara kuantitatif dengan menggunakan metode Region of Interest (ROI) pada komputer MRI kemudian dilakukan analisis Signal to Noise Ratio (SNR) dan Contrast to Noise Ratio (CNR) serta analisis terhadap Susceptibility  Artifacts dan Chemical Shift. Variasi Time Echo dan bandwidth berpengaruh signifikan terhadap nilai SNR dan CNR pada hasil citra T2 Axial Gradient Echo MRI Shoulder. Pengaruh kedua variasi tersebut adalah semakin kecil nilai TE dan BW didapatkan SNR yang meningkat. Jika TE diperbesar maka didapatkan CNR yang meningkat. Kualitas citra optimal yang dapat menghasilkan keadaan patologis ditentukan dengan meningkatnya nilai CNR dan nilai artefak yang menurun. Sehingga pada penelitian ini kombinasi antara 2 variabel tersebut dapat menentukan citra optimal pada TE 20ms dan BW 210 Hz/Px.
Pengembangan Sistem Kontrol dan Pemantauan Tetesan Cairan Infus Otomatis Berbasis Labview dengan Logika Fuzzy Yunardi, Riky Tri; Setiawan, Dani; Maulina, Farah; Prijo, Tri Anggono
Jurnal Teknologi Informasi dan Ilmu Komputer Vol 5, No 4: Agustus 2018
Publisher : Fakultas Ilmu Komputer, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (486.101 KB) | DOI: 10.25126/jtiik.201854766

Abstract

Dalam instrumentasi medis infus merupakan perangkat yang digunakan untuk mengalirkan cairan, obat atau nutrisi secara intravena. Fungsi utama dari infus yaitu memberikan cairan secara periodik pada pasien. Perangkat infus saat ini, untuk mengendalikan kecepatan tetesan cairan dilakukan secara manual oleh staf medis. Masalah yang sering terjadi, seperti penyumbatan atau kehabisan isi cairan dan apabila tidak segera ditangani akan berbahaya bagi pasien. Penelitian ini bertujuan untuk mengembangkan sistem kontrol dan pemantauan aliran cairan infus secara otomatis. Dengan menggunakan LabVIEW National Instruments untuk memantau tetesan cairan infus. Sistem kontrol logika Fuzzy diimplementasikan dengan menggunakan mikrokontroler berbasis ATmega, yang dilengkapi dengan pompa udara, motor stepper dan pendeteksi aliran cairan. Sistem yang telah dibuat ini dapat dikembangkan untuk membantu tenaga medis dalam memantau kecepatan tetesan cairan infus untuk mencegah risiko terhadap pasien. AbstractIn the medical instrumentation infusion is a device used to drain fluids, medication or nutrients intravenously. The main function of the infusion is to give fluids periodically in patients. Infusion device at this time, to control the speed of the liquid droplets is done manually by the medical staff. Problems often occur, such as a blockage or run out of the fluid content and if not promptly treated can be harmful to the patient. This research aims to develop a prototype of control system and monitoring of the infusion liquid droplets automatically. By using the National Instruments LabVIEW to monitor the flow of intravenous fluids. The Fuzzy logic control system is implemented using an ATmega based microcontroller, equipped with air pumps, stepper motors and liquid flow detection. The performance of the prototype system of monitoring the flow of intravenous fluids automatically have a success rate of 96.75% at the set point value of 20 drops in 1 minute.