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Search Results: 1 - 10 of 7650 matches for " Incheol Park "
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Mesocosm Assessment of Stability Habitat for Halophyte  [PDF]
Sunghoon Ryu, Incheol Lee
Journal of Geoscience and Environment Protection (GEP) , 2015, DOI: 10.4236/gep.2015.36003

In this paper, we constructed the halophyte Mesocosm experimental group which was used as a substrate material that consisted of tidal flat and dredged sediment. Depending on whether the ingredients of vegetation and substrate material of Mesocosm, we constructed Mesocosm A (tidal flat sediment + Salicornia herbecea), Mesocosm B (only dredged sediment), Mesocosm C (dredged sediment + Salicornia herbecea). Monitoring was carried out of seawater quality factors (Chemical Oxygen Demand (COD), Total Nitrogen (T-N), Total Phosphorus (T-P), temperature, salinity), sediment factors (Chemical Oxygen Demand (COD), Total (T-N), Total Phosphorus (T-P) and growth of Salricornia herbecea) in each Mesocosm. Habitat Stability Index of vegetation was calculating by using the monitoring results. HSI of Mesocosm C was calculated from 0.87 to 0.95 as compared to the relatively high HSI Mesocosm A, it was evaluated to be able to be used in the restoration of the coastal salt marsh with dredged sediment.

eIF4GI Facilitates the MicroRNA-Mediated Gene Silencing
Incheol Ryu, Ji Hoon Park, Sihyeon An, Oh Sung Kwon, Sung Key Jang
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0055725
Abstract: MicroRNAs (miRNAs) are small noncoding RNAs that mediate post-transcriptional gene silencing by binding to complementary target mRNAs and recruiting the miRNA-containing ribonucleoprotein complexes to the mRNAs. However, the molecular basis of this silencing is unclear. Here, we show that human Ago2 associates with the cap-binding protein complex and this association is mediated by human eIF4GI, a scaffold protein required for the translation initiation. Using a cap photo-crosslinking method, we show that Ago2 closely associates with the cap structure. Taken together, these data suggest that eIF4GI participates in the miRNA-mediated post-transcriptional gene silencing by promoting the association of Ago2 with the cap-binding complex.
Diagnostic Radiation Exposure of Injury Patients in the Emergency Department: A Cross-Sectional Large Scaled Study
Je Sung You, Hye-Jeong Lee, Yong Eun Chung, Hye Sun Lee, Myo Jeong Kim, Sung Phil Chung, Myeong-Jin Kim, Incheol Park, Ki Whang Kim
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0084870
Abstract: In contrast to patients with underlying cancer or chronic disease, injury patients are relatively young, and can be expected to live their natural lifespan if injuries are appropriately treated. Multiple and repeated diagnostic scans might be performed in these patients during admission. Nevertheless, radiation exposure in injury patients has been overlooked and underestimated because of the emergent nature of such situations. Therefore, we tried to assess the cumulative effective dose (cED) of injury patients in the emergency department. We included patients who visited the emergency department (ED) of a single tertiary hospital due to injury between February 2010 and February 2011. The cED for each patient was calculated and compared across age, sex and injury mechanism. A total of 11,676 visits (mean age: 28.0 years, M:F = 6,677:4,999) were identified. Although CT consisted of only 7.8% of total radiologic examinations (n=78,025), it accounted for 87.1% of the total cED. The mean cED per visit was 2.6 mSv. A significant difference in the cED among injury mechanisms was seen (p<0.001) and patients with traffic accidents and fall down injuries showed relatively high cED values. Hence, to reduce the cED of injury patients, an age-, sex- and injury mechanism-specific dose reduction strategy should be considered.
The Finite-Element Modeling of Dynamic Motions of a Constraint Wind Turbine and the System Diagnosis for the Safety Control  [PDF]
Raiwung Park
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.512123

The aim of this paper is to present a finite element modeling of the dynamic motion of a turbine rotor and its controller design with the mass unbalance under a crack on a rotating shaft. This process is an advanced method to the mathematical description of a system including an influence of a mass unbalance and a crack on the rotor shaft. As the first step, the shaft is physically modeled with a finite element method and the dynamic mathematical model is derived by using the Hamilton principle; thus, the system is represented by various subsystems. The equation of motion of a shaft with a mass unbalance and a crack is established by adapting the local mass unbalance and stiffness change through breathing and gaping from the existence of a crack. This is a reference system for the given system. Based on a fictitious model for transient behavior induced from vibration phenomena measured at the bearings, an elementary estimator is designed for the safety control and detection of a mass unbalance on the shaft. Using the state estimator, a bank of an estimator is established to get the diagnosis and the system data for a controller.

The effect of individualized music on agitation for home-dwelling persons with dementia  [PDF]
Heeok Park
Open Journal of Nursing (OJN) , 2013, DOI: 10.4236/ojn.2013.36061

Purpose: The purpose of this study was to test the effect of individualized music on agitation for homedwelling patients with dementia. Method: One group pre-post test was used for research design and a total of 26 subjects participated in this study. Individualized music intervention was subjects’ listening to their preferred music for 30 minutes prior to peak agitation time twice a week for a total of four sessions. The subject’s agitation levels were measured for three different points: thirty minutes prior to listening to music, 30 minutes while listening to the music, and after listening to the music throughout the 4 sessions. To measure the agitation level, the modified CohenMansfield Agitation Inventory was used. A Paired ttest was used for data analysis. Results: Most subjects were female (73.1%), Caucasian (92.4%), Protestant (50%), and independent activity (53.8%). The mean of the subjects’ MMSE scores was 8.08 (8.17). The most favorite music types included country/western music (31.0%), religious music (26.9%), and big band (26.9%). Agitation level decreased while listening to the music compared to the baseline (t = 3.70, p < .001). Conclusion: The findings of this study would provide meaningful data to develop an individualized music intervention protocol to control agitation for homedwelling patients with dementia.


Partially Funded Social Security and Inter-Generational Distribution  [PDF]
Hyeon Park
Theoretical Economics Letters (TEL) , 2014, DOI: 10.4236/tel.2014.49107
Abstract: This paper introduces a parametric model of partially funded social security system and analyzes inter-generational distribution of consumption and welfare in an OLG general equilibrium. This paper specifically aims to examine the effects of transition toward more funded system on saving and capital accumulation. It is shown that an increase in intensity of fundedness increases capital accumulation unless the income effect from interest rate change outweighs other effects and negatively affects the total saving severely. By deriving closed form solutions for the variables, this paper finds that an increase in the intensity of fundedness increases saving but decreases consumption, when population growth rate is greater than the net return to capital. This paper also finds that for a partially funded system, an increase in tax rate increases public saving but reduces private saving unambiguously, while the effects on consumption and capital accumulation are not conclusive.
Difference in the Contents of Music Intervention to Control Agitation by Music Providers  [PDF]
Heeok Park
Open Journal of Nursing (OJN) , 2015, DOI: 10.4236/ojn.2015.58077
Abstract: Purpose: The purpose of this study was to compare the contents of music intervention studies between the music therapists and non-music therapists who endeavored to control agitation in patients with dementia, and to provide meaningful ideas to improve the music interventions by music providers. Method: This study is a review study by searching CINAHL, MEDLINE, and PsychINFO for the keywords, “agitation” and “music,” which are used in the searches. Results: A total of 30 studies of music intervention (7 studies about music therapists and 23 studies about non-music therapists) were included for the review. The studies about music therapists had a more reasonable sample size, variety of music activities, and comparison groups. The studies of non-music therapists were provided by nurses, researchers, recreational therapists, and trained nursing assistants and they provided music using background music at a scheduled time for care, such as mealtimes and bathing times. Conclusions: Studies on music interventions need to have a more rigorous research design, such as randomized controlled trials for the future studies. Furthermore, there is a need for multi-disciplinary music intervention studies by music providers who have different types of educational backgrounds and clinical experiences.
Fluid-Structure Interaction Analysis for Drug Transport in a Curved Stenotic Right Coronary Artery  [PDF]
Seungman Park
Journal of Biosciences and Medicines (JBM) , 2016, DOI: 10.4236/jbm.2016.45011
Abstract: A blockage of blood vessels resulting from thrombus or plaque deposit causes serious cardiovascular diseases. This study developed a computational model of blood flow and drug transport to investigate the effectiveness of drug delivery to the stenotic sites. A three-dimensional (3D) model of the curved stenotic right coronary artery (RCA) was reconstructed based on the clinical angiogram image. Then, blood flow and drug transport with the flexible RCA wall were simulated using the fluid structure interaction (FSI) analysis and compared with the rigid RCA wall. Results showed that the maximal total displacement and von Mises stress of the flexible RCA model are 2.14 mm and 92.06 kPa. In addition, the effective injecting time point for the best performance of drug delivery was found to be between 0 s and 0.15 s (i.e., the fluid acceleration region) for both rigid and flexible RCA models. However, there was no notable difference in the ratio of particle deposition to the stenotic areas between the rigid and flexible RCA models. This study will be significantly useful to the design of a drug delivery system for the treatment of the stenotic arteries by targeting drugs selectively to the stenotic sites.
Willingness to Pay for the Subscription Fee of Public Broadcasting System  [PDF]
Inho Park, Hyun Soon Park
Advances in Journalism and Communication (AJC) , 2014, DOI: 10.4236/ajc.2014.21001
Abstract: The study aims at developing communication strategies for the public broadcasting system according to WTP (Willingness to Pay) for the subscription fee and the audience’s perception of the public broadcasting system as a public good. A quasi-experiment was conducted for audiences who have previously watched public broadcasting channels. According to the results, those respondents who think of public broadcasting as a public good and who think that public broadcasting performs its public role well have high intention to pay the subscription fee. Respondents feel at a loss when they pay the subscription fee, and the willingness to pay the fee goes down.
A Brief Review: Stage-Convertible Power Amplifier Using Differential Line Inductor  [PDF]
Jonghoon Park, Changhyun Lee, Changkun Park
Wireless Engineering and Technology (WET) , 2012, DOI: 10.4236/wet.2012.34027
Abstract: In this review article, a stage-convertible RF power amplifier designed with a 0.18-μm RF CMOS process is described. A method to implement a low-power matching network is an essential technology for the stage-convertible power amplifier. Various low-power matching networks with distributed active transformers as an output power combiner are compared in terms of the amounts of undesired coupling, the chip size, and the amount of power loss. The feasibility of a differential line inductor for the stage-convertible power amplifier is assessed and explained. Finally, we show that the differential line inductor is a realistic means of reducing the overall chip size, enhancing the quality factor of the matching network, and minimizing the undesired coupling between the inter-stage matching network and any output matching network. Additionally, the operating mechanism of the stage-convertible power amplifier using the differential line inductor for a low-power matching network is described in detail.
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