도시공간적 요인에 의한 침수피해의 영향 분석

박기용(Kiyong Park),오후(Hoo Oh),전원식(Won-Sik Jeon),이의훈(Eui Hoon Lee) 한국산학기술학회 2020 한국산학기술학회논문지 Vol.21 No.9

본 연구는 도시지역에 침수피해가 발생하였을 경우, 장기적인 측면에서 침수피해를 최소화 할 수 있는 방안을 마련하기 위해 비구조적인 대책에 초점을 맞추어 도시공간적인 요인과 침수피해의 영향 관계를 분석하였다. 도시공간적인 요인에 의한 침수피해 영향을 분석하고자 다중회귀 분석(Multiple Regression Analysis)을 활용하여 적용하였다. 도시공간적인 요인은 Open Space, 방재시설, 도시화 부문으로 유형화하였다. 분석 결과, 침수피해 지역은 일정한 지역에 한정되어 발생하며, 공간적으로 매우 높은 상관성을 보이고 있음을 알 수 있다. Open Space의 면적이 넓을수록 침수피해액이 감소하는 바, 녹지, 공원 등의 감소가 침수피해를 증가시키고 있음을 확인할 수 있어, 도시의 안전이라는 기능적인 부분에 있어서 침수피해를 예방하고 대응하기 위해 매우 중요한 요인임을 알 수 있다. 도시화 부문에 포함되는 인구밀도, 지역내총생산(GRDP) 등의 요인은 그 값이 클수록 침수피해액은 증가하는 것으로 분석되어, 침수피해를 유발시키는 원인으로 판단된다. 따라서 기후변화에 적응하기 위해서는 녹지, 공원 등의 도시공간 계획을 전략적으로 수립해야 하며, 인구밀도, 지역내총생산(GRDP) 등은 침수피해를 유발시키는 주요 요인이므로 회복력 차원에서 적절하게 활용한다면 대응과 복구 역할을 할 것으로 판단된다. This study investigated the long-term measures to minimize flood damage in the event of flooding in urban areas. The relationship between urban spatial factors and the impact of flood damage was analyzed, focusing on non-structural measures. The urban spatial factors were categorized into three parts: open space, disaster prevention facilities, and urbanization sectors. Multiple regression analysis was used to investigate how urban spatial factors influence flood damage. As a result of the analysis, the crucial factors, such as the reduced green areas and parks included in the open space sectors, resulted in an increased flood damage potential. The posterior factors, such as the population density and GRDP included in the urbanization sector concurrently led to an increase in the flood damage potential. Therefore, to better adapt to climate change, it is necessary to establish urban spatial plans strategically, such as green areas and parks. Meanwhile, the population density and GRDP are also the main factors causing flood damage. Therefore, when used appropriately in terms of resilience, it will serve as adaptations and recovery.

Room temperature humidity sensors based on rGO/MoS₂ hybrid composites synthesized by hydrothermal method

Park, Seo Yun,Lee, Jung Eun,Kim, Yeon Hoo,Kim, Jason J.,Shim, Young-Seok,Kim, Soo Young,Lee, Min Hyung,Jang, Ho Won Elsevier 2018 Sensors and actuators. B Chemical Vol.258 No.-

<P><B>Abstract</B></P> <P>Recently, two-dimensional (2D) materials have attracted attention for gas sensor fields due to their unique properties such as high surface to volume ratio and numerous active sites. In particular, reduced graphene oxide (rGO) and MoS<SUB>2</SUB> are one of the most promising materials for humidity sensor due to the oxygen containing functional groups on the surface of rGO and dangling bonds at the edge site of MoS<SUB>2</SUB>. Herein, we present 2D rGO/2D MoS<SUB>2</SUB> hybrid composites (MS-GOs) synthesized by hydrothermal method. rGO and MoS<SUB>2</SUB> are mixed with different molar ratios and drop-casted on SiO<SUB>2</SUB> substrate with Pt interdigitated electrode. At an optimized molar ratio of rGO/MoS<SUB>2</SUB>, the sensor device exhibits high sensitivity, good selectivity, rapid response and recovery, and good linearity for humidity sensing. The enhanced sensing properties are attributed to the <I>p</I>-<I>n</I> junction between rGO and MoS<SUB>2</SUB>. Our work provides an efficient way for realizing high-performance and fast responding humidity sensors utilizing 2D-2D heterojunction materials based chemoresistive humidity sensors for use in diverse applications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> 2D rGO/2D MoS<SUB>2</SUB> hybrid composites are synthesized by hydrothermal method and their humidity sensing properties are evaluated. </LI> <LI> rGO/MoS<SUB>2</SUB> based sensors exhibit high sensitivity, good selectivity, rapid response, and good linearity for humidity sensing. </LI> <LI> The enhanced sensing properties of rGO/MoS<SUB>2</SUB> than pristine rGO are attributed to p-n junction between rGO and MoS<SUB>2</SUB>. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Biological Activity of Recombinant Human Erythropoietin (EPO) In Vivo and In Vitro

Park Jong-Ju,Lee Hyen-Gi,Nam In-Suk,Park Hee-Ja,Kim Min-Su,Chung Yun-Hi,Naidansuren Purevjargal,Kang Hye-Young,Lee Poong-Yun,Park Jin-Gi,Seong Hwan-Hoo,Chang Won-Kyong,Kang Myung-Hwa 한국동물번식학회 2005 Reproductive & developmental biology Vol.29 No.2

The hematopoietic growth factor erythropoietin (EPO) is required for the maintenance, proliferation, and differentiation of the stem cells that produce erythrocytes. To analyse the biological activity of the recombinant human EPO (rec-hEPO), we have cloned the EPO cDNA and genomic DNA and produced rec-hEPO in the CHO cell lines. The growth and differentiation of EPO-dependent human leukemic cell line (F36E) were used to measure cytokine dependency and in vitro bioactivity of rec-hEPO. MIT assay values were increased by survival of F36E cells at 24h or 72h. The hematocrit and RBC values were increased by subcutaneous injection of 20 IU (in mice) and 100IU(in rats) rec-hEPO. Hematocrit values remarkably increased at 13.2% (in mice) and 12.2% (in rats). The pharmacokinetic behavior with injection of 6 IU of rec-hEPO remained detectable after 24 h in all mice tested. The highest peat appeared at 2h after injection. The long half-life of rec-hEPO is likely to confer clinical advantages by allowing less frequent dosing in patients treated for anemia. These data demonstratethat ree-hEPO produced in this study has a potent activity in vivo and in vitro. The results also suggest that biological activity of ree-hEPO could be remarkably enhanced by genetic engineering that affects the potential activity, including mutants with added oligosaccharide chain and designed to produce EPO-EPO fusion protein.

Study on Condensation Heat Transfer Characteristics of Hydrocarbons Natural Refrigerants

Hoo Kyu Oh,Seung Jun Park,Ki Won Park,Geon Sang Roh,Jae Cheon Jeong 대한설비공학회 2001 International Journal Of Air-Conditioning and Refr Vol.9 No.3

This study investigated the condensation heat transfer coefficients of R-22, R-290 and R-600a inside horizontal tube. Heat transfer measurements were performed for smooth tube with inside diameter of 10.07 ㎜ and outside diameter of 12.07 ㎜ and inner grooved tube having 75 fins whose height is 0.25 ㎜. Condensation temperatures and mass velocity were ranged from 308 K to 323 K and 51 ㎏/㎡s to 250 ㎏/㎡s, respectively. The test results showed that the local condensation heat transfer coefficients increased as the mass flux increased, and also the effects of mass velocity on heat transfer coefficients of R-290 and R-600a were less than those of R-22. Average condensation heat transfer coefficients of natural refrigerants were superior to that of R-22. The present results had a good agreement with Cavallini-Zecchin's correlation for smooth and inner grooved tubes.

Biological Activity of Recombinant Human Erythropoietin (EPO) In Vivo and In Vitro

Park Jong-Ju,Lee Hyen-Gi,Nam In-Suk,Park Hee-Ja,Kim Min-Su,Chung Yun-Hi,Naidansuren Purevjargal,Kang Hye-Young,Lee Poong-Yun,Park Jin-Gi,Seong Hwan-Hoo,Chang Won-Kyong,Kang Myung-Hwa 한국동물생명공학회(구 한국동물번식학회) 2005 Reproductive & Developmental Biology(Supplement) Vol.29 No.2s

The hematopoietic growth factor erythropoietin (EPO) is required for the maintenance, proliferation, and differentiation of the stem cells that produce erythrocytes. To analyse the biological activity of the recombinant human EPO (rec-hEPO), we have cloned the EPO cDNA and genomic DNA and produced rec-hEPO in the CHO cell lines. The growth and differentiation of EPO-dependent human leukemic cell line (F36E) were used to measure cytokine dependency and in vitro bioactivity of rec-hEPO. MIT assay values were increased by survival of F36E cells at 24h or 72h. The hematocrit and RBC values were increased by subcutaneous injection of 20 IU (in mice) and 100IU(in rats) rec-hEPO. Hematocrit values remarkably increased at $13.2\%$ (in mice) and $12.2\%$ (in rats). The pharmacokinetic behavior with injection of 6 IU of rec-hEPO remained detectable after 24 h in all mice tested. The highest peat appeared at 2h after injection. The long half-life of rec-hEPO is likely to confer clinical advantages by allowing less frequent dosing in patients treated for anemia. These data demonstratethat ree-hEPO produced in this study has a potent activity in vivo and in vitro. The results also suggest that biological activity of ree-hEPO could be remarkably enhanced by genetic engineering that affects the potential activity, including mutants with added oligosaccharide chain and designed to produce EPO-EPO fusion protein.

Combined Korean Medicine Treatment of a Rare Case of Burst Fracture in an Elderly Patient with Kissing Spine

Park, Eun-Young,Choi, Jong-Ho,Jo, Hoo-In,Lee, Soo-Kyung,Lee, June-Haeng,Kang, Sun-Woo,Won, Yoon-Jae,Choi, Sung-Ryul,Cho, Yu-Jin Korean AcupunctureMoxibustion Medicine Society 2021 대한침구의학회지 Vol.38 No.2

A burst fracture refers to the fracture of the anterior and middle vertebral columns which are moving into the spinal canal causing neurological impairments, generally requiring surgical treatment. We herein report a rare case of burst fracture with kissing spine in a 90-year-old man who had severe lower back pain that worsened during back extension. Considering the surgical treatment risk, he was hospitalized at a Korean medicine hospital for 85 days and underwent combined Korean medicine treatments including pharmacopuncture, herbal medicine, chuna, deep-fascia meridian therapy, walking practice, and abdominal breathing. Based on patient-reported scales, his pain was alleviated, and his physical function improved. Furthermore, his range of motion and walking time increased. This case report suggests that combined Korean medicine treatments could be an effective alternative for patients with burst fracture who have surgery risks.

Serum NT-proBNP Level as a marker for cardiopulmonary function in preeclampsia(초)

( Won Joon Seong ),배지혜 ( Ji Hye Bae ),( Gun Oh Chong ),( Dae Gy Hong ),( Taek Hoo Lee ),( Yoon Soon Lee ),( Young Lae Cho ),( Sang Sik Chun ),( Il Soo Park ) 대한산부인과학회 2009 대한산부인과학회 학술대회 Vol.95 No.-

Posterior Screw Fixation in Previously Augmented Vertebrae with Bone Cement : Is It Inapplicable?

Park, Jae Hoo,Ju, Chang Il,Kim, Seok Won The Korean Neurosurgical Society 2018 Journal of Korean neurosurgical society Vol.61 No.1

Objective : The purpose of this study was to determine the feasibility of screw fixation in previously augmented vertebrae with bone cement. We also investigated the influence of cement distribution pattern on the surgical technique. Methods : Fourteen patients who required screw fixation at the level of the previous percutaneous vertebroplasty or balloon kyphoplasty were enrolled in this study. The indications for screw fixation in the previously augmented vertebrae with bone cement included delayed complications, such as cement dislodgement, cement leakage with neurologic deficits, and various degenerative spinal diseases, such as spondylolisthesis or foraminal stenosis. Clinical outcomes, including pain scale scores, cement distribution pattern, and procedure-related complications were assessed. Results : Three patients underwent posterior screw fixation in previously cemented vertebrae due to cement dislodgement or progressive kyphosis. Three patients required posterior screw fixation for cement leakage or displacement of fracture fragments with neurologic deficits. Eight patients underwent posterior screw fixation due to various degenerative spinal diseases. It was possible to insert screws in the previously augmented vertebrae regardless of the cement distribution pattern; however, screw insertion was more difficult and changed directions in the patients with cemented vertebrae exhibiting a solid pattern rather than a trabecular pattern. All patients showed significant improvements in pain compared with the preoperative levels, and no patient experienced neurologic deterioration as seen at the final follow-up. Conclusion : For patients with vertebrae previously augmented with bone cement, posterior screw fixation is not a contraindication, but is a feasible option.

Identification of Candidate Genes Associated with Beef Marbling Using QTL and Pathway Analysis in Hanwoo (Korean Cattle)

Park, Hye-Sun,Seo, Seong-Won,Cho, Yong-Min,Oh, Sung-Jong,Seong, Hwan-Hoo,Lee, Seung-Hwan,Lim, Da-Jeong Asian Australasian Association of Animal Productio 2012 Animal Bioscience Vol.25 No.5

Marbling from intramuscular fat is an important trait of meat quality and has an economic benefit for the beef industry. Quantitative trait loci (QTL) fine mapping was performed to identify the marbling trait in 266 Hanwoo steers using a 10K single nucleotide polymorphism panel with the combined linkage and linkage disequilibrium method. As a result, we found nine putative QTL regions for marbling: three on BTA6, two on BTA17, two on BTA22, and two on BTA29. We detected candidate genes for marbling within 1 cM of either side of the putative QTL regions. Additionally, to understand the functions of these candidate genes at the molecular level, we conducted a functional categorization using gene ontology and pathway analyses for those genes involved in lipid metabolism or fat deposition. In these putative QTL regions, we found 95 candidate genes for marbling. Using these candidate genes, we found five genes that had a direct interaction with the candidate genes. We also found SCARB1 as a putative candidate gene for marbling that involves fat deposition related to cholesterol transport.

EFFECT OF ENTRAINMENT ON COMBUSTION EFFICIENCY OF HIGH ASH ANTHRACITES IN FLUIDIZED BED COMBUSTORS

Park, Won Hoon,Choi, Jeong Hoo,Park, Yeong Seong,Park, Young Ok,Son, Jae Ek 한국화학공학회 1985 Korean Journal of Chemical Engineering Vol.2 No.2