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Minsung Cho,Hyeok-Hee Lee,Jang-Hyun Baek,Kyu Sun Yum,Min Kim,Jang-Whan Bae,Seung-Jun Lee,Byeong-Keuk Kim,Young Ah Kim,JiHyun Yang,Dong Wook Kim,Young Dae Kim,Haeyong Pak,Kyung Won Kim,Sohee Park,Seng 한국역학회 2024 Epidemiology and Health Vol.46 No.-
OBJECTIVES: The escalating burden of cardiovascular disease (CVD) is a critical public health issue worldwide. CVD, especially acute myocardial infarction (AMI) and stroke, is the leading contributor to morbidity and mortality in Korea. We aimed to develop algorithms for identifying AMI and stroke events from the National Health Insurance Service (NHIS) database and validate these algorithms through medical record review. METHODS: We first established a concept and definition of “hospitalization episode,” taking into account the unique features of health claims-based NHIS database. We then developed first and recurrent event identification algorithms, separately for AMI and stroke, to determine whether each hospitalization episode represents a true incident case of AMI or stroke. Finally, we assessed our algorithms’ accuracy by calculating their positive predictive values (PPVs) based on medical records of algorithm-identified events. RESULTS: We developed identification algorithms for both AMI and stroke. To validate them, we conducted retrospective review of medical records for 3,140 algorithm-identified events (1,399 AMI and 1,741 stroke events) across 24 hospitals throughout Korea. The overall PPVs for the first and recurrent AMI events were around 92% and 78%, respectively, while those for the first and recurrent stroke events were around 88% and 81%, respectively. CONCLUSIONS: We successfully developed algorithms for identifying AMI and stroke events. The algorithms demonstrated high accuracy, with PPVs of approximately 90% for first events and 80% for recurrent events. These findings indicate that our algorithms hold promise as an instrumental tool for the consistent and reliable production of national CVD statistics in Korea.
Topological quantum phase transitions driven by external electric fields in Sb2Te3 thin films.
Kim, Minsung,Kim, Choong H,Kim, Heung-Sik,Ihm, Jisoon National Academy of Sciences 2012 PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF Vol.109 No.3
<P>Using first-principles calculations, we show that topological quantum phase transitions are driven by external electric fields in thin films of Sb(2)Te(3). The film, as the applied electric field normal to its surface increases, is transformed from a normal insulator to a topological insulator or vice versa depending on the film thickness. We identify the band topology by directly calculating the Z(2) invariant from electronic wave functions. The dispersion of edge states is also found to be consistent with the bulk band topology in view of the bulk-boundary correspondence. We present possible applications of the topological phase transition as an on/off switch of the topologically protected edge states in nano-scale devices.</P>
김민성(Minsung Kim),김태현(Taehyun Kim),송한림(Hanlim Song),어순기(Sunki Uh),김현수(Hyunsoo Kim) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Performance simulator for a manual tansmision test is developed. Firstly, dynamic models for two types of clutch control actuator are obtained, and efficiencies of CHC and CSC control actuators are evaluated. In addition, dynamic models of the MT powertrain are obtained and MT vehicle performance simulator is developed. Using the simulator, vehicle performance such as MT input torque, acceleration, etc. are investigated. It is expected that the MT performance smulator developed in this study can be used in design of clutch and MT system.<br/>
Recent registration of microbial pesticides: Fungi-based insecticides
Jae Su Kim,Mi Rong Lee,Jong Cheol Kim,Sihyeon Kim,So Eun Park,Dongwei Li,Sehyeon Baek,Minsung Jo,Tae Young Shin,Leila Gasmi,Junheon Kim 한국응용곤충학회 2019 한국응용곤충학회 학술대회논문집 Vol.2019 No.04
The serious emergence of chemical-mediated residual toxicity and insect resistance have been enforced the regulation of synthetic pesticides. Future decisions to select more realistic control options probably depend on the speed of technological development in chemical and biological pesticides. Now, a strategic collaboration between synthetic pesticides and biopesticides has been progressed, such as distribution and R&D in collaboration and M&A for obtaining microbial resources. Recently registered microbial pesticides are entomopathogenic fungi in pest management. A concept of e-biopesticide could be properly combined with digital agriculture and accelerate the use of biological control agents in the future farming.