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Why Are South Korean Citizens Dissatisfied with Democracy?
( Hee Min ) 인제대학교 민주주의와자치연구소(구 비교민주주의연구센터) 2019 비교민주주의연구 Vol.15 No.1
This study’s purpose is to analyze the sources of dissatisfaction with Korean democracy, and, more specifically, the origin and detail of citizens’ dissatisfaction with the political system. Though many democracy indices categorize Korea as a full democracy, most Korean citizens distrust political institutions more than ever before. Even though Korean citizens have a high level of political efficacy, they are not satisfied with the working of democracy. This study conceptualizes this phenomenon as the type of critical citizen. In sum, this study tries to show the level of democracy in Korea through this concept and examine the citizen deficits which appear in current Korean democracy.
Hee Min,Seongyi Yun 한국학술연구원 2018 Korea Observer Vol.49 No.1
Many previous studies have proven that social media is more likely to promote selective exposure in the acquisition of political information and to escalate political polarization than is older media. However, this study argues that the impact of social media on selective exposure and political polarization occurs differently according to the characteristics of their platforms. To prove this argument, we firstly compared old and social media in terms of their impact on selective exposure. Secondly, we compared the two different types of social media, Facebook and KakaoTalk, to examine their influences on selective exposure and the political polarization of public opinion during the presidential impeachment in South Korea. As a result, we observed that people using social media were more selective in choosing news sources than those using television. We also found that users of KakaoTalk were more selective in acquiring political information on the presidential impeachment than were Facebook users, and the same consequences appeared in political polarization. Therefore, we determined that the political and social influence of social media varies according to its platform characteristics.
Heemin Kang,Sung-Tae Park 대한영상의학회 2023 대한영상의학회지 Vol.84 No.2
Intracranial dural arteriovenous fistula (DAVF) is an abnormal arteriovenous shunt accounting for approximately 10%–15% of all intracranial vascular malformations. Most intracranial DAVFs are solitary, but multiple lesions at different sites can rarely occur. Most intracranial multiple DAVFs are synchronous types, whereas metachronous lesions are relatively uncommon. Herein, we report a rare case of metachronous DAVF occurring after the embolization of a preceding lesion in a 75-year-old female.
Intelligent Lighting Control using Wireless Sensor Networks for Media Production
( Heemin Park ),( Jeff Burke ),( Mani B. Srivastava ) 한국인터넷정보학회 2009 KSII Transactions on Internet and Information Syst Vol.3 No.5
We present the design and implementation of a unique sensing and actuation application -- the Illuminator: a sensor network-based intelligent light control system for entertainment and media production. Unlike most sensor network applications, which focus on sensing alone, a distinctive aspect of the Illuminator is that it closes the loop from light sensing to lighting control. We describe the Illuminator`s design requirements, system architecture, algorithms, implementation and experimental results. The system uses the Illumimote, a multi-modal and high fidelity light sensor module well-suited for wireless sensor networks, to satisfy the high-performance light sensing requirements of entertainment and media production applications. The Illuminator system is a toolset to characterize the illumination profile of a deployed set of fixed position lights, generate desired lighting effects for moving targets (actors, scenic elements, etc.) based on user constraints expressed in a formal language, and to assist in the set up of lights to achieve the same illumination profile in multiple venues. After characterizing deployed lights, the Illuminator computes optimal light settings at run-time to achieve a user-specified actuation profile, using an optimization framework based on a genetic algorithm. Uniquely, it can use deployed sensors to incorporate changing ambient lighting conditions and moving targets into actuation. Experimental results demonstrate that the Illuminator handles various high-level user requirements and generates an optimal light actuation profile. These results suggest that the Illuminator system supports entertainment and media production applications.
Remotely Controllable Nanoengineered Materials for Dynamic Biomedical Engineering
Heemin Kang(강희민) 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
Developing remotely controllable nanoengineered biomedical materials can regulate and unravel nanoscale and dynamic cell-material interactions at the molecular level. In this talk, I will present the design of nanoengineered biomedical materials that can be remotely controlled by various stimuli, such as magnetic field, light, and self-assembly. I will show ligand stretching, sequencing, alignment, sliding, uncaging, and oscillation to magnetically regulate stem cell adhesion, mechanosensing, and differentiation. I will also show the use of up conversion nanoparticles for near-infrared light-controlled intracellular molecular delivery. I will finally demonstrate the use of nanomaterial self-assembly to regulate the adhesion and release of macrophages and their polarization. We plan to further design novel surface-nanoengineered biomaterials that are remotely controllable for non-toxic and patient-tailorable regenerative and immune engineering.
Chang, Heemin,Yoo, Jounghyun,Kim, Hyemin,Park, Wonchan,Hahn, Sei Kwang,Kwon, Woosung North-Holland 2019 Journal of luminescence Vol.214 No.-
<P><B>Abstract</B></P> <P>Nanoparticles with excellent physical and chemical properties are very promising for biomedical applications. However, their application in clinical trials may be hindered by their toxicity. Among various biomedical materials, silica nanoparticles (SNPs) are most attractive and widely studied materials owing to their high biocompatibility and functionality. In this study, we have synthesized fluorescent SNPs with controlled shapes and sizes by using SiCl<SUB>4</SUB>. To control the reaction rate of SiCl<SUB>4</SUB> with water, two solvents immiscible with each other were employed. Our SNPs exhibit fluorescence near 2.95 eV (420 nm), originated from optically active silanone and dioxasilyrane defects, and are applied to in-vitro bioimaging of lung epithelial carcinoma cells (A549) without cytotoxicity. We believe that our novel synthesis method using orthogonal solvents will broaden the application range of highly reactive but potentially suitable precursors, which successfully realizes SNPs with defect-induced optical properties for various biomedical applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Fluorescent silica nanoparticles were prepared using two-phase orthogonal solvents. </LI> <LI> The shape and size can be controlled by the concentration of SiCl<SUB>4</SUB>. </LI> <LI> Defect-induced photoluminescence at around 420 nm (2.95 eV) was observed. </LI> <LI> Cytotoxicity was tested and in vitro imaging was successfully demonstrated. </LI> </UL> </P>