태안해안국립공원 바람아래 특별보호구역의 지형 및 염생식물 분포특성 연구

박정원(Jeongwon Park),서종철(Jongchul Seo),김진석(Jinseok Kim),오선관(Sunkwan Oh),박정원(Jungwon Park) 국립공원연구원 2013 국립공원연구지 Vol.4 No.1

본 연구는 바람아래 할미섬 특별보호구역의 자연해안 복원 연구를 위하여 현재의 해빈의 높이, 면적, 해안의 길이, 사구정상의 높이 등 정확한 지형의 현황을 분석하고 지형특성에 따른 사구·염생식물 분포를 분석하고자 하였다. 할미섬 지형의 최고높이는 17m이며 제일 낮은 높이는 평균 3m에서 5m로 섬 남단 만입에서 남동쪽 니질조간대 지역이다. 연구지역내 총 소산식물은 17목 23과 40속 49종 3변종 8외래종이 생육하고 있으며 곰솔군락, 갈참나무군락, 보리장나무군락, 아까시나무군락, 순비기나무군락 등 5개 목본군락과 띠군락, 갯그령군락, 갯잔디군락, 나문재군락, 왕잔디군락, 갯메꽃군락, 해홍나물군락, 천일사초군락, 갯쇠보리군락, 통보리사초군락 등 10개 염생·사구식물군락이 분포하고 있으며 갯그령-띠군락, 띠-갯메꽃군락, 띠-갯그령군락, 띠-은백양나무군락 등 4개의 혼합군락이 분포하고 있다. 식물의 공간적 분포 특성은 곰솔(Pt1), 갯그령(Em2,3,4), 갯잔디(Zs5)를 제외한 식생군락의 대부분이 10m2에서 500m2의 작은 패치형태를 띄고 있으며 높이는 평균 4m에서 6m 사이, 해안선으로부터 거리는 100m에서 150m 사이에 분포하고 잇는 것으로 분석되었다. This study was carried out to investigate the exact current status of the topography such as the present beach elevation and area, coastline and the height of the dune crest, with the analysis of the distribution of the sand dune·halophytes on geomorphic characteristics for the restoration of natural coast in the protection zone of Baramarye Halmi-island. Halmi-island has the maximum height of 17m and the lowest height of average 3m to 5m, which is the muddy tidal flat area located southeast of the embayment on the southern tip of the island. The total distribution of plants in the research sites are 17 orders, 23 families, 40 genus, 49 species and 8 exotic species: 5 arbors communities including Pinus thunbergii, Quercus aliena, Elaeagnus glabra, Robinia pseudo-acacia, Vitex rotundifolia etc., 10 halophytes and sand dune plants communities including Calystegia soldanella, Suaeda maritima, Carex scabrifolia, Ischaemum anthephoroides, Carex kobomugi etc and 4 mixed communities including Elymus mollis-Imperata cylindrica var. koenigii, Imperata cylindrica var. koenigii-Calystegia soldanella, Imperata cylindrica var. koenigii-Elymus mollis, Imperata cylindrica var. koenigii-Populus alba etc. The spatial distribution characteristics of plants are identified that the most plant community are distributed in the distance of between 100m to 150m from the coastline, with the small-scale patch structure of 10m2 to 500m2 and the height of average 4cm to 6cm except Pinus thunbergii (Pt1), Elymus mollis (Em2,3,4) and Zoysia sinica (Zs5).

Determination of effective mass density and modulus for resonant metamaterials.

Park, Jeongwon,Park, Buhm,Kim, Deokman,Park, Junhong American Institute of Physics for the Acoustical S 2012 Journal of the Acoustical Society of America Vol.132 No.4

<P>This work presents a method to determine the effective dynamic properties of resonant metamaterials. The longitudinal vibration of a rod with periodically attached oscillators was predicted using wave propagation analysis. The effective mass density and modulus were determined from the transfer function of vibration responses. Predictions of these effective properties compared favorably with laboratory measurements. While the effective mass density showed significant frequency dependent variation near the natural frequency of the oscillators, the elastic modulus was largely unchanged for the setup considered in this study. The effective mass density became complex-numbered when the spring element of the oscillator was viscoelastic. As the real part of the effective mass density became negative, the propagating wavenumber components disappeared, and vibration transmission through the metamaterial was prohibited. The proposed method provides a consistent approach for evaluating the effective parameters of resonant metamaterials using a small number of vibration measurements.</P>

Geometry transformation and alterations of periodically patterned Si nanotemplates by dry oxidation

Park, Jeongwon,Chen, Li-Han,Hong, Daehoon,Choi, Chulmin,Loya, Mariana,Brammer, Karla,Bandaru, Prab,Jin, Sungho IOP Pub 2009 Nanotechnology Vol.20 No.1

<P>We report on the size-dependent transformation and geometrical modifications of periodically patterned Si templates by a combination of dry oxidation and chemical etching. Deep ultraviolet lithography patterned circular holes with diameters varying between 190 nm and 1 µm on Si wafers were oxidized at 1000 °C using dry oxygen for various durations, with selected samples chemically etched for oxide removal for additional alterations. An interesting phenomenon of a circular-to-square shape transformation of the holes was observed, which was particularly pronounced in the sub-200 nm regime. We tentatively attribute the change to the surface energy and geometry constraints in nanoscale patterns. </P>

Feature Generation for Storage Location Assignment based on Flow Time Estimation

Jeongwon Park,Soondo Hong 한국경영과학회 2023 한국경영과학회 학술대회논문집 Vol.2023 No.5

Atmospheric deposition of anthropogenic inorganic nitrogen in airborne particles and precipitation in the East Sea in the northwestern Pacific Ocean

Park, Geun-Ha,Lee, Seon-Eun,Kim, Young-il,Kim, Dongseon,Lee, Kitack,Kang, Jeongwon,Kim, Yeo-Hun,Kim, Haryun,Park, Seunghee,Kim, Tae-Wook Elsevier 2019 Science of the Total Environment Vol.681 No.-

<P><B>Abstract</B></P> <P>The atmospheric deposition of anthropogenic nitrogen is an increasingly important new source of nitrogen to the ocean. Coastal areas east of the Korean Peninsula are suitable for the investigation of the effects of atmospheric anthropogenic nitrogen on the ocean nutrient system because of the low riverine discharge rates and the prevailing influence of the East Asian outflow. Thus, we measured the concentrations of nitrate (NO<SUB>3</SUB> <SUP>−</SUP>) and ammonium (NH<SUB>4</SUB> <SUP>+</SUP>) in airborne particles and in precipitation from March 2014 to February 2016 at a coastal site (37.08°N, 129.41°E) on the east coast of Korea. The dry deposition of NO<SUB>3</SUB> <SUP>−</SUP> (27–30 mmol N m<SUP>−2</SUP> yr<SUP>−1</SUP>) was far greater than that of NH<SUB>4</SUB> <SUP>+</SUP> (6–8 mmol N m<SUP>−2</SUP> yr<SUP>−1</SUP>). The greater rate of dry NO<SUB>3</SUB> <SUP>−</SUP> deposition was associated with air masses traveling over northeastern China and central Korea. In contrast, the rates of wet deposition of NO<SUB>3</SUB> <SUP>−</SUP> (17–24 mmol N m<SUP>−2</SUP> yr<SUP>−1</SUP>) and NH<SUB>4</SUB> <SUP>+</SUP> (14–27 mmol N m<SUP>−2</SUP> yr<SUP>−1</SUP>) were comparable and were probably associated with in-cloud scavenging of these ions. The results indicate that the total deposition of NO<SUB>3</SUB> <SUP>−</SUP> and NH<SUB>4</SUB> <SUP>+</SUP> combined could contribute to ~2.4% and ~1.9% of the primary production in the coastal areas east of the Korean Peninsula and in the East Asian marginal seas, respectively, which would be a lower bound because the dry deposition of reactive nitrogen gas was not included. Our study shows that the atmospheric input of anthropogenic NO<SUB>3</SUB> <SUP>−</SUP> and NH<SUB>4</SUB> <SUP>+</SUP> may substantially increase phytoplankton biomass in the coastal waters of the East Sea near the Korean Peninsula.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Atmospheric Nitrogen Deposition (AND) was 64–89 mmol N m<SUP>−2</SUP> yr<SUP>−1</SUP> in the East Sea. </LI> <LI> AND was enhanced in air masses traveling over northeastern China and central Korea. </LI> <LI> AND could contribute to ~1.9% of the primary production of East Asian seas. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Rapid Non-Invasive Cell Type Identification for iPSC Cell Therapy with Artificial Intelligence-based Holotomography Analysis

Jeongwon SHIN,Hoewon PARK,Geon KIM,Eubin HWANG,Ki-Jun YOON,YongKeun PARK 한국생물공학회 2022 한국생물공학회 학술대회 Vol.2022 No.9

Financing the Commercialisation of Green Innovation

Jeongwon Park,Changhyun Jeong 과학기술정책연구원 2013 STI Policy Review Vol.4 No.1

Innovation plays a large role in green growth. While it is a widely accepted view that, without innovation, it would be very difficult and costly to address major environmental issues, innovation itself tends to be constrained by limited access to eco-financing and is inherently risky, often requiring a long-term horizon. Although global consensus is more or less established as to the urgency and necessity of accelerating green innovation, the quality and quantity of financing in this area is largely insufficient, with increasing funding gaps in many countries. A new financial mechanism is urgently needed in order to re-orient financial flow and enable innovators to overcome the valleys of death that occur throughout the innovation cycle. A number of different modalities exist in financing the commercialisation of eco-innovation. Existing mechanisms have not been as successful as expected, revealing critical limits to furthering certain types of projects that are essential for economic and environmental progress. Experts’ estimations have shown that the funding gap will widen in the coming years as demand for clean energy and green infrastructure rises, and as green technologies and innovation develop faster than the market for it can develop. Against this backdrop, the main purpose of this research is threefold: to identify issues and problems regarding current means of funding for eco-innovation and green projects; to provide insight into securing longterm green financing by looking at European cases; and ultimately to suggest policy implications for designing and implementing eco-specific financial instruments, focusing on governments’ roles in sustainable financing for eco-innovation. This study analyses different models of financing mechanisms, a mix of public and private funds, in view of suggesting conditions for the sustainable financing of green projects, especially for large-scale high-risk projects. Based on the findings from the analyses of mechanisms and the shortcomings of the existing funding modalities, this study ultimately suggests policy implications for effectively supporting the commercialisation of eco-innovation.

An Analysis of Infodemics Latent Class on Coronavirus Infections-19(COVID-19) in Korea

Jeongwon Han,Junhee Park,Hanna Lee,Jiyun Park,Yekyung Lee 한국간호과학회 2021 한국간호과학회 학술대회 Vol.2021 No.10

Aim: This study is a cross-sectional descriptive study that attempts to find ways to manage infodemics for infectious disease by identifying infodemics latent class of Korean adults during the Corona Virus Infectious Disease-19 pandemic. Method: The study subjects were 210 adults 19 years of age or older working in company with 50 or more employees, centered in Seoul, Gyeonggi, and Gyeongsang-do, where the incidence of Corona Virus Infectious Disease-19 was relatively high. Result: The latent class of subjects" infodemics was analyzed using LPA(Latent Profile Analysis). The model fit was BIC=3462.34, saBIC=3389.46, LMR<.001, BLRT < .001. Latent class 1 is an “infodemics safety group” with a very low fear of COVID-19 and a high self-efficacy against COVID-19 prevention. In this group, the sharing of false information is low and the sharing of the correct information is high. Latent class 2 is an “infodemics boundary group” that has a high sense of self-efficacy against COVID-19 prevention, but has low degree both correct information and misinformation sharing. Latent class 3 is an “infodemic risk group” that has high fear of COVID-19 and shares both false and correct information, but has a low degree of prevention against COVID-19. Conclusion: In the early stages of infectious diseases, accurate information sharing is important factor on prevention behavior of infectious diseases. Because information sharing and propagation can vary from individual to individual, it is necessary to explore ways to control information of social dimension during infectious disease pandemic.

Deficiency of IL-1 receptor antagonist suppresses IL-10-producing B cells in autoimmune arthritis in an IL-17/Th17-dependent manner

Park, Jin-Sil,Kim, Na-Rae,Lim, Mi-Ae,Kim, Sung-Min,Hwang, Sun-Hee,Jung, Kyung-Ah,Choi, JeongWon,Park, Sung-Hwan,Cho, Mi-La Elsevier 2018 Immunology letters Vol.199 No.-

<P>Rheumatoid arthritis (RA) is a systemic autoimmune disease with CD4(+) T cell infiltration and hyperplasia of synovial tissues leading to progressive destruction of articular cartilage. In addition to the central role of T cells in the pathogenesis of RA, recent reports have suggested that B cells also contribute to RA. To explore the effects of interleukin (IL)-17 on B cell development and response in excess IL-1 signaling, we generated IL-17 and IL-1 receptor antagonist (IL-1Ra) double-deficient mice via backcrossing IL-17 knockout (KO) and IL-1RaKO mice. We studied the effect of IL-17 deficiency on antibody-producing B cells and regulatory B cells in IL-1RaKO mice. Excess IL-1 signal increased the frequency of B220(+) IgG(+) cells and plasma cells. It also promoted the production of immunoglobulins in vitro. Moreover, IL-17 deficiency significantly enhanced the frequency of regulatory IL-10-producing regulatory B cells in IL-1RaKO mice. IL-17 deficiency ameliorated disease symptoms of inflammatory arthritis in IL-1RaKO mice by suppressing the frequency of plasma cells and antibody production while enhancing the frequency of IL-10-producing B cells. These findings suggest that IL-17 can trigger an inflammatory immune reaction by activating antibody-producing B cells while suppressing immune regulatory B cells in RA.</P>

Sensing of fluid viscoelasticity from piezoelectric actuation of cantilever flexural vibration

Park, Jeongwon,Jeong, Seongbin,Kim, Seung Joon,Park, Junhong American Institute of Physics 2015 Review of scientific instruments Vol.86 No.1

<P>An experimental method is proposed to measure the rheological properties of fluids. The effects of fluids on the vibration actuated by piezoelectric patches were analyzed and used in measuring viscoelastic properties. Fluid-structure interactions induced changes in the beam vibration properties and frequency-dependent variations of the complex wavenumber of the beam structure were used in monitoring these changes. To account for the effects of fluid-structure interaction, fluids were modelled as a simple viscoelastic support at one end of the beam. The measured properties were the fluid's dynamic shear modulus and loss tangent. Using the proposed method, the rheological properties of various non-Newtonian fluids were measured. The frequency range for which reliable viscoelasticity results could be obtained was 10-400 Hz. Viscosity standard fluids were tested to verify the accuracy of the proposed method, and the results agreed well with the manufacturer's reported values. The simple proposed laboratory setup for measurements was flexible so that the frequency ranges of data acquisition were adjustable by changing the beam's mechanical properties.</P>