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Charged Droplet Behavior on Drop on Demand (DoD) Electrohydrodynamics (EHD) inkjet Printing
Hadi Teguh Yudistira,Vu Dat Nguyen,Doyoung Byun 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
Inkjet printing technology has got attention for fabrication process. Electrohydrodynamics (EHD) inkjet printing can produce tiny droplets. There are many charge droplets that were produced by EHD inkjet printing for several seconds. Charge accumulation was exist on substrate. Due to electric field force and charge interaction force, droplet may not go straight to substrate. Droplet may get reflection, deflection or retract to meniscus which make problem in EHD inkjet printing.
Wira Winardi,Widhy Yudistira Nalapraya,Sarifuddin Sarifuddin,Samsul Anwar,Amanda Yufika,Adityo Wibowo,Iziddin Fadhil,Hendra Wahyuni MS,Yunita Arliny,Dewi Behtri Yanifitri,Teuku Zulfikar,Harapan Harapa 대한예방의학회 2022 예방의학회지 Vol.55 No.5
Objectives: The Indonesian Ministry of Health launched isoniazid preventive therapy (IPT) in 2016, with general practitioners (GPs) at the frontline of this program. However, the extent to which GPs have internalized this program remains uncertain. The aim of this study was to identify the knowledge and attitudes of GPs towards the IPT program in Indonesia. Methods: This study used an online, self-administered questionnaire distributed via e-mail and social messaging services. A logistic regression model was employed to identify the explanatory variables influencing the level of knowledge and attitudes toward IPT among GPs in Indonesia. An empirical analysis was conducted separately for each response variable (knowledge and attitudes). Results: Of the 418 respondents, 128 (30.6%) had a good knowledge of IPT. Working at a public hospital was the only variable associated with good knowledge, with an adjusted odds ratio (aOR) of 1.69 (95% confidence interval [CI], 1.02 to 2.81). Furthermore, 279 respondents (66.7%) had favorable attitudes toward IPT. In the adjusted logistic regression analysis, good knowledge (aOR, 0.55; 95% CI, 0.34 to 0.89), 1-5 years of work experience (aOR, 2.09; 95% CI, 1.21 to 3.60), and having experienced IPT training (aOR, 0.48; 95% CI, 0.25 to 0.93), were significantly associated with favorable attitudes. Conclusions: In general, GPs in Indonesia had favorable attitudes toward IPT. However, their knowledge of IPT was limited. GPs are an essential element of the IPT program in the country, and therefore, adequate information dissemination to improve their understanding is critical for the long-term viability and quality of the IPT program in Indonesia.
Drop on Demand 전기수력학적 젯 프린팅의 라인 안정성 연구
명재범(Jaebeom Myeong),Hadi Teguh Yudistira,Ayodya Pradhipta Tenggara,변도영(Doyoung Byun) 한국가시화정보학회 2016 한국가시화정보학회 학술발표대회 논문집 Vol.2016 No.12
Studying the behaviours of droplets deposited by Electrohydrodynamic (EHD) jet printing becomes important because its unique property which can eject a much smaller volume of droplets than the volume of ejected droplets obtained by other conventional inkjet printing technologies. In this research, the stability of printed line deposited by droplet-on-demand (DoD) Electrohydrodynamics (EHD) jet-printing was investigated using silver nanoparticle ink. By varying the distance of drops, four modes of printed results could be obtained: isolated dot, pair’s dot, line and bulging line. To investigate the mechanism of bulging and drop coalescence phenomena, the effect of droplet volume and the overlapping ratio of drops were investigated in two different substrates, i.e. conductive substrate (Si) and the dielectric substrate (glass) were used. The results of this research can give direction to make high resolution conductive pattern using EHD jet printing in electronic and photonic devices.