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Hyobin Park,Kyoungwon Seo 한국HCI학회 2023 한국HCI학회 학술대회 Vol.2023 No.2
Narrative artificial intelligence (AI), which adds narrative persuasion to simple causal interpretation, is an explainable AI technique that helps patients understand their health data (e.g., MRI results). Narrative AI is expected to improve causability for health data and thereby induce meaningful behavioral change. However, research on which type of narrative AI (i.e., counterfactual or prefactual) better improves causability for complex health data is still elusive. This study created two different types of narrative AI for MRI reports (i.e., counterfactual and prefactual) and compared their impact on causability with 20 participants. System causability scale results showed that both narrative AI provided a high level of causability. Semi-structured interview results showed that the two narrative AIs improve causability by different mechanisms. While counterfactual made participants focus on self-reflection, prefactual made participants seek self-improvement to prepare for the future. Our findings showed that the two types of narrative AI (i.e., counterfactual and prefactual) improve causability by different mechanisms. By understanding these different underlying mechanisms, we expect to be able to design and deliver more personalized narrative AI to users.
Design of an Extensive Emergency Rescue Service for Electric Vehicles
Junghoon Lee,Hyobin Kim,Gyung-Leen Park 보안공학연구지원센터 2014 International Journal of Control and Automation Vol.7 No.10
This paper designs and develops an emergency rescue service for electric vehicles (EVs), which may suffer from the battery depletion during their trips. After building relevant data models on both chargers and EVs, our design defines the interaction among three parties of EV drivers, the rescue server, and rescue vehicles to responsively process the dispatch request and systematically meet the user requirement. Particularly, a comprehensive mobile application is developed on the Android operating system to help users to promptly send a rescue request to the server and monitor the request processing status. This user interface allows EV drivers to automatically specify their locations and necessary personal information as well as to view the distribution of emergency vehicles through user-friendly maps. Our design is scalable for a large number of emergency vehicles and rescue requests, accelerating the wide deployment of EVs in our daily lives. Moreover, the rescue system design can collaborate with an EV tracking system and charge reservation agents to create a more sophisticated EV information service.
Effects of voluntary exercise on apoptosis and cortisol after chronic restraint stress in mice
( Hyobin Seo ),( Chun Hyung Park ),( Seokrip Choi ),( Woocheol Kim ),( Byung Duk Jeon ),( Seungpil Ryu ) 한국운동영양학회 2016 Physical Activity and Nutrition (Phys Act Nutr) Vol.20 No.3
[Purpose] To determine whether voluntary exercise (wheel running) has the potential of relieving stress. [Methods] In this study, restraint stress with or without voluntary wheel running was performed for mice housed in individual cages. A total of 21 ICR male mice were assigned into control (CON), restraint stress with voluntary exercise (RSVE), or restraint stress (RS) without voluntary exercise groups (n = 7 each). [Results] No significant difference in body weight increase was found among the three groups, although CON and RS groups had a tendency of having smaller body weight increase compared to the RSVE group. No significant difference in the expression level of liver heat shock protein 70, Bcl-2, or p53 was found among the three groups. However, caspase-3 protein level in RS group was significantly higher than that in the other two groups. Blood cortisol concentration in RS was higher (p < 0.05) than that in RSVE or CON group. It was the lowest (p < 0.05) in the RSVE group. [Conclusion] Our findings suggest that apoptosis caused by chronic restraint stress might be suppressed by voluntary exercise in mice.
Seo Hyobin,Jin Kwang Nam,Ji Sang Park,Kang Koung Mi,Eun Kyung Lee,이지예,Yoo Roh-Eul,박영주,김지훈 대한초음파의학회 2023 ULTRASONOGRAPHY Vol.42 No.2
Purpose: This study evaluated thyroid cancer risk in a lung cancer screening population according to the presence of an incidental thyroid nodule (ITN) detected on low-dose chest computed tomography (LDCT). Methods: Of 47,837 subjects who underwent LDCT, a lung cancer screening population according to the National Lung Screening Trial results was retrospectively enrolled. The prevalence of ITN on LDCT was calculated, and the ultrasonography (US)/fine-needle aspiration (FNA)–based risk of thyroid cancer according to the presence of ITN on LDCT was compared using the Fisher exact or Student t-test as appropriate. Results: Of the 2,329 subjects (female:male=44:2,285; mean age, 60.9±4.9 years), the prevalence of ITN on LDCT was 4.8% (111/2,329). The incidence of thyroid cancer was 0.8% (18/2,329, papillary thyroid microcarcinomas [PTMCs]) and was higher in the ITN-positive group than in the ITN-negative group (3.6% [4/111] vs. 0.6% [14/2,218], P=0.009). Among the 2,011 subjects who underwent both LDCT and thyroid US, all risks were higher (P<0.001) in the ITNpositive group than in the ITN-negative group: presence of thyroid nodule on US, 94.1% (95/101) vs. 48.6% (928/1,910); recommendation of FNA according to the American Thyroid Association guideline and Korean Thyroid Imaging Reporting and Data System guideline, 41.2% (42/101) vs. 2.4% (46/1,910) and 39.6% (40/101) vs. 1.9% (37/1,910), respectively. Conclusion: Despite a higher risk of thyroid cancer in the LDCT ITN-positive group than in the ITN-negative group in a lung cancer screening population, all cancers were PTMCs. A heavy smoking history may not necessitate thorough screening US for thyroid incidentalomas.