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Kil, Tae-Hwan,Han, Ji-Yeon,Kim, Jun-Bum,Ko, Gyeong-Ok,Lee, Young-Hyeok,Kim, Kil-Young,Lim, Jae-Woo The Korean Pediatric Society 2011 Clinical and Experimental Pediatrics (CEP) Vol.54 No.2
Purpose: The aim of this study was conducted to investigate the mean nRBC count in very low births weight infants (VLBWIs) and to determine the usefulness of the nRBC as an independent prognostic factors of perinatal complications in VLBWIs. Methods: This study was conducted on 112 VLBWIs who were hospitalized in the neonatal intensive care unit (NICU) of the author's hospital within the period from March 2003 to and May 2008. Based on the infants' nucleated red blood cells (nRBC) counts at birth, on the third day after birth, on the seventh day after birth, in the second week after birth, and in the fourth week after birth in the medical records, the correlation between nRBC or absolute nRBC counts with birth weight, gestational age, and other perinatal outcomes were retrospectively investigated. Results: In VLBWIs, their mean nRBC and absolute nRBC counts were showing a gradual decrease after birth, and they were consisteantly kept at low values since one week after and inversely proportional to the birth weights. The mean nRBC counts based on the stage after birth showed a significant correlation with perinatal death, necrotizing enterocolitis, and severe intraventricular hemorrhage. Conclusion: The increase in the nRBC count showed a significant correlation with having a severe intraventricular hemorrhage, necrotizing enterocolitis, and perinatal death in VLBWIs. If an increase or no decrease in the nRBC count after birth is observed, newborninfant care precautions should be required.
Tae Hwan Kil,임재우,Ji Yeon Han,김준범,Gyeong Ok Ko,Young Hyeok Lee,Kil Young Kim 대한소아청소년과학회 2011 Clinical and Experimental Pediatrics (CEP) Vol.54 No.2
Purpose: The aim of this study was conducted to investigate the mean nRBC count in very low births weight infants (VLBWIs) and to determine the usefulness of the nRBC as an independent prognostic factors of perinatal complications in VLBWIs. Methods: This study was conducted on 112 VLBWIs who were hospitalized in the neonatal intensive care unit (NICU) of the author's hospital within the period from March 2003 to and May 2008. Based on the infants’ nucleated red blood cells (nRBC) counts at birth, on the third day after birth, on the seventh day after birth, in the second week after birth, and in the fourth week after birth in the medical records, the correlation between nRBC or absolute nRBC counts with birth weight, gestational age, and other perinatal outcomes were retrospectively investigated. Results: In VLBWIs, their mean nRBC and absolute nRBC counts were showing a gradual decrease after birth, and they were consisteantly kept at low values since one week after and inversely proportional to the birth weights. The mean nRBC counts based on the stage after birth showed a significant correlation with perinatal death, necrotizing enterocolitis, and severe intraventricular hemorrhage. Conclusion: The increase in the nRBC count showed a significant correlation with having a severe intraventricular hemorrhage,necrotizing enterocolitis, and perinatal death in VLBWIs. If an increase or no decrease in the nRBC count after birth is observed, newborninfant care precautions should be required.
Rock-Kil Ko,Sung-Hwan Bae,Myung-Jin Jung,Se-Hoon Jang,Kyu-Jeong Song,Chan Park,Myung-Hwan Sohn,Suk-ill Kang,Sang-Soo Oh,Dong-woo Ha,Hong-Soo Ha,Ho-Sup Kim,Young-Cheol Kim IEEE 2009 IEEE transactions on applied superconductivity Vol.19 No.3
<P>In order to investigate the possibility of using mixed rare earth (Nd<SUB>1/3</SUB>Eu<SUB>1/3</SUB>Gd<SUB>1/3</SUB>)Ba<SUB>2</SUB>Cu<SUB>3</SUB>O<SUB>7-x</SUB> (NEG123) as the superconducting layer of the HTS coated conductor, the NEG123 thin film was deposited epitaxially on LAO(100) single crystal and IBAD_YSZ metal templates by pulsed laser deposition. Systematic studies were carried out to investigate the influences of deposition parameters of PLD on the microstructure, texture and superconducting properties of NEG-123 coated conductor. Deposition at oxygen partial pressure of 600 mTorr was needed to routinely obtain high quality NEG123 films with J<SUB>C</SUB>'s (77 K) over 2 MA/cm<SUP>2</SUP> and Tc's over 90 K (DeltaT ~ 2 K) . We verified from magnetization study that the NEG123 has an improved in-field Jc as the field increases at temperatures between 10 K and 77 K compared with Gd123. The J<SUB>C</SUB> (77 K, self field) and the value of onset T<SUB>C</SUB> of NEG123 thin film on LAO substrate was 4.0 MA/cm<SUP>2</SUP> and 92 K, respectively. This is the first report, to the best of our knowledge, of coated conductors with NEG123 film as the superconducting layer which have Ic and Jc over 40 A/cm-width and 1.6 MA/cm<SUP>2</SUP> at 77 K, self field. This study shows the possibility of using NEG123 film as the superconducting layer of the HTS coated conductor which can be used in high magnetic field power electric devices.</P>
고지환(Jee Hwan Ko),이종범(Jong Bum Lee),오영균(Young Kun Oh),손성경(Song Kyong Son),서영석(Young Seok Seo),이기환(Ki Hwan Lee),남상륜(Sang Lyun Nam),노흥태(Heung Tae Noh),강길전(Kil Chun Kang) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.8
Objective : The study was designed to find out current state of conservative treatment modalities for cervical pregnancies in korean. Method : 64 cases of cervical pregnancies reported by the joining of The Korean Society of Obstetrics & Gynecology from 1960 to 2000 and the 10 cases at Chungnam National University Hospital were analyzed retrospectively. Results : The average age of the 74 cases was 31.7±6.6 years, and the average gestational age at the time of diagnosis was 8.3±3.4 weeks. The average duration of hospitalization was 8.2±4.8 days. Most (67/74) of the patients had previously experienced delivery or abortion. Out of the 74 cases, 36 had total hysterectomy; 4 cases had curettage; 12 were used only methotrexate; 11 had combined curettage and methotrexate; 10 cases had Foley catheter ballooning after curettage. From the 1960's to the end of 1980's, 33 (84.6%) cases out of 39 were performed hysterectomy. Whereas mainly conservative methods, in particular methotrexate treatment, were performed in the 1990's. Among the conservative modalities, Foley catheter ballooning after curettage had the shortest length of hospitalization with 4.3 days. Conclusion : After comparing the conservative methods for treating cervical pregnancies, it was found that methotrexate treatment was performed the most; however, Foley catheter ballooning after curettage seems to be an excellent treatment option.
Effects of stabilization variables on mechanical properties of isotropic pitch based carbon fibers
Kil, Hyun-Sig,Jang, So Young,Ko, Seunghyun,Jeon, Young Pyo,Kim, Hwan-Chul,Joh, Han-Ik,Lee, Sungho Elsevier 2018 Journal of industrial and engineering chemistry Vol.58 No.-
<P><B>Abstract</B></P> <P>Optimization of the stabilization process for manufacturing low-cost carbon fibers was performed. By simply varying both heating rate (0.5–10°C/min) and starting temperature (25–230°C), the resulting fibers possessed different properties such as densities, oxygen contents, and weight gains due to the oxygen up-takes. Subsequent oxidative reactions led to changes in chemical compositions of the fibers. Therefore, this study suggests that more concerned design with complementary parameters such as starting temperature and heating rate, significantly reducing stabilization time down to 56.5min with the comparable mechanical properties of the conventional isotropic pitch based CFs.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Kil-hwan Shin,Choon Yeul Lee,Woon-heok Ko 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.10
This study analyzes the difference in the intention to use an e-Procurement system by examining public institution procurement managers and the bidding managers of procurement businesses who participate in government bids. A comparison of intention of use between procurement institutions and procurement businesses showed that the influence on the intention to use among public institution procurement managers was stronger than was that on procurement business bidding managers. The results also showed that public institution procurement managers had a stronger influencing relationship with social influence, task–technology fit, partnership, and security variables; the factors and functions related to these must be strengthened in order to revitalize the e-Procurement system. Meanwhile, procurement business bidding managers had a strong relationship with the facilitating condition and technological characteristic variables. This study is significant in showing the importance of strengthening the functions related to security.
O Kil Kim,Su Hong Kim,Jong Bin Kim,Woo Seong Jeon,Sung Hwan Jo,Jee Hyun Lee,Ji Ho Ko 대한내과학회 2006 The Korean Journal of Internal Medicine Vol.21 No.3
Vascular catheters are associated with complications such as infection, thrombosis and stenosis. The embolization of a venous catheter fragment is a rare complication. A 39-year-old woman underwent placement of a totally implantable venous access device for chemotherapy to treat a recurrent liposarcoma of the left thigh. The "pinch-off sign" was noted on a routine chest X-ray but that was ignored. Three-months after implantation of the intravenous access device, the indwelling central catheter was fractured and embolized to the pulmonary trunk. The catheter in the pulmonary trunk was successfully removed through a percutaneous femoral vein approach using a pigtail catheter and goose neck snare.
A New High-Yielding and Good-Quality Rice Cultivar Adaptable to Direct Seeding "Hoanbyeo"
Jae Kil Lee,Mun Sik Shin,Hyun Tak Shin,Jae Kwon Ko,Bo Kyeong Kim,Kyu Seong Lee,Tae Hwan Noh,Seung Yeob Lee,Young Doo Kim,Ki Yong Ha,Jin Il Choung,Young Tae Lee,Hyun Sun KimSo 한국육종학회 2003 한국육종학회지 Vol.35 No.4
“Hoanbyeo” is a new japonica rice cultivar developed from a cross between Kanto149 and Milyang95 by the rice breeding team of National Honam Agricultural Experiment Station (NHAES), RDA, during 1990 to 1998. This cultivar requires about 121days of growth