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Shin, Jin Soo,Ku, Keun Bon,Jang, Yejin,Yoon, Yi-Seul,Shin, Daeho,Kwon, Oh Seung,Go, Yun Young,Kim, Seong Soon,Bae, Myoung Ae,Kim, Meehyein MICROBIOLOGICAL SOCIETY OF KOREA 2017 JOURNAL OF MICROBIOLOGY -SEOUL- Vol. No.
<P>Influenza viruses are major human respiratory pathogens that cause high morbidity and mortality worldwide. Currently, prophylactic vaccines and therapeutic antiviral agents are used to prevent and control influenza virus infection. Oseltamivir free base (OSV-FB), a modified generic antiviral drug of Tamiflu (oseltamivir phosphate, OSV-P), was launched in the Republic of Korea last year. Here, we examine the bioequivalence of these two compounds by assessing their antiviral efficacy in infected cells and in a mouse model. It was observed that both antivirals showed comparable efficacy against 11 different influenza A and B viruses in vitro. Moreover, in mice infected with influenza A virus (mouse-adapted A/Puerto Rico/8/34), they showed a dose-dependent therapeutic activity and alleviated infection-mediated reductions in body weight, leading to significantly better survival. There was histopathological disappearance of virus-induced inflammatory cell infiltration of the lung after oral treatment with either antiviral agent (at 10 mg/kg). Pharmacokinetic analysis also exhibited similar plasma concentrations of the active drug, oseltamivir carboxylate, metabolised from both OSV-B and OSV-P. This is the first report showing bioequivalence of OSV-FB to its phosphate salt form in the mouse system. The free base drug has some beneficial points including simple drug formulation process and reduced risk of undesirable cation-phosphate precipitation within solution. The long term stability of OSV-FB requires further monitoring when it is provided as a national stock in readiness for an influenza pandemic.</P>
Trends of Artificial Intelligence Product Certification Programs
Yejin SHIN,Joon Ho KWAK,KyoungWoo CHO,JaeYoung HWANG,Sung-Min WOO 한국인공지능학회 2023 인공지능연구 (KJAI) Vol.11 No.3
With recent advancements in artificial intelligence (AI) technology, more products based on AI are being launched and used. However, using AI safely requires an awareness of the potential risks it can pose. These concerns must be evaluated by experts and users must be informed of the results. In response to this need, many countries have implemented certification programs for products based on AI. In this study, we analyze several trends and differences in AI product certification programs across several countries and emphasize the importance of such programs in ensuring the safety and trustworthiness of products that include AI. To this end, we examine four international AI product certification programs and suggest methods for improving and promoting these programs. The certification programs target AI products produced for specific purposes such as autonomous intelligence systems and facial recognition technology, or extend a conventional software quality certification based on the ISO/IEC 25000 standard. The results of our analysis show that companies aim to strategically differentiate their products in the market by ensuring the quality and trustworthiness of AI technologies. Additionally, we propose methods to improve and promote the certification programs based on the results. These findings provide new knowledge and insights that contribute to the development of AI-based product certification programs.
Fabrication of replica cliché with fine pattern using reverse offset printing process
Shin, Yejin,Kim, Inyoung,Oh, Dongho,Lee, Taik-Min Elsevier 2018 THIN SOLID FILMS - Vol.647 No.-
<P><B>Abstract</B></P> <P>Among the printing processes for printed electronic devices, the gravure offset and reverse offset methods have drawn attention for their fine pattern printing potential. These printing methods use a cliché, which has a decisive effect on the precision and quality of the final product. In this research, a precise cliché replica method is proposed. It consists of copper (Cu) sputtering, precise reverse offset printing with a 5-μm pattern width, nickel‑cobalt (Ni-Co) electroplating, rinsing, etching, and diamond-like carbon (DLC) coating. Cu is deposited on glass by sputtering to a thickness of 3μm. Ni-Co is electroplated to a thickness of 300nm only on the copper and not on the printed pattern. After removing the printed pattern during the rinsing process, Cu is etched through the revealed part resulting from the rinsing process. For the last step of the process, DLC coating is conducted to protect the surface. We finally compare the fabricated replica cliché with the original and print out precise patterns using the replica cliché.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The reverse offset printing method was adapted to replicate the fine pattern cliché. </LI> <LI> Silver nano ink pattern was dried but not sintered by controlling plasma treatment. </LI> <LI> The printed pattern with a line width of 4.8μm can be obtained using replica cliché. </LI> </UL> </P>
Yejin Shin,Mina K. Kim 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
The aim of this study was to compare organic and non-organic doenjang from physiochemical, antioxidant activities and sensorial perspectives. Two doenjang samples were included: Traditional doenjang made with non-GMO soybeans and organic doenjang using certified organic soybeans. Two samples were produced from same manufacturers at similar time frame. The physiochemical properties of doenjang were determined, and the antioxidant activity of doenjang was determined including total polyphenol, DPPH and ABTS. Descriptive sensory analysis using highly trained panel (n=6) was also conducted. There were no significant differences in pH, moisture content and °brix. Salinity, viscosity, and color between two samples. As for antioxidant activities, total polyphenol, DPPH, and ABTS values were higher in organic doenjang. Traditional doenjang showed sensory characteristics of fish sauce, chocolate, pear and organic doenjang showed pineapple, dried plum, and balsamic aromatics. This study suggests that the quality of doenjang that has undergone the same fermentation process may vary depending on the raw materials used.