Investigation of the April 2000 forest fire damage in Kang-won Province, Korea, using RADARSAT data

Kang, Sung Chul,Seo, Jin Won,Lee, Tae Hee,Park, Sang Eun,Hong, Suk Young,Moon, Wooil M. 대한원격탐사학회 2000 International Symposium on Remote Sensing Vol.16 No.1

The series of forest Fires in Kangwon Province in April, 2000, were one of the mast serious ones in the Kang-won Province in recent years. The fire damaged areas are extensive and this paper investigates the utility of the satellite image data, particularly the RADARSAT SAR data. One of the main objectives of this study included evaluation of potential usefulness of the C-band RADARSAT data in the detection of forest fires in mountainous areas. Among several fire damaged sites, the area near Samchuk (city) was selected as the main study area and mufti-temporal RADARSAT(raw) data were acquired and the processed results were comparatively investigated with the IRS-1c data acquired shortly after the fire. To identify the burnt area from the undamaged background in the optical imagery, supervised classification and NDVI processing were carried out and tested with the IRS-1C data. For this experiment, several sets of raw RADARSAT standard and Fine mode (S4, F3, ascending orbit) data were processed and the final image was formed. In addition to the final image, sigma nought (σ°) was catnputed and compared for the burnt area against the undamaged areas. Because of the steep slopes in the study area and subsequent deviation from the flat surface scattering models, the fire scars in the sigma nought (σ°) image were not apparent. However, fire scars are slightly detected in the difference and ratio images obtained from the signal intensity data acquired at different dates (bath before and after fire). Texture analysis of the image data including the burnt areas were carried out using the Multiplicative Markov Random-Field (MMRF) algorithm. The detection of the fire damaged area from both standard mode and fine mode RADARSAT was not as straightforward as in optical data. However, Previous studies with ERS-1 S_AR and RADARSAT data in Indonesia and in the North American Plains indicate that C-band SAR data provide us with an effective tool for studying the forest fire damages. However, the application of C-band SAR data to the analysis of the forest fire areas requires careful processing of the data with realistic scattering models.

Corifollitropin alfa versus daily recombinant fsh treatment for controlled ovarian stimulation in poor responders

( Chung Hoon Kim ),( Jei Won Moon ),( Jin Young Min ),( Jun Woo Ahn ),( Sung Hoon Kim ),( Hee Dong Chae ),( Byung Moon Kang1 ) 대한산부인과학회 2014 대한산부인과학회 학술대회 Vol.100 No.-

목적: To compare the effect of long-acting recombinant FSH (rFSH), corifollitropin alfa with daily rFSH administered during 1st 7days of controlled ovarian stimulation (COS) using GnRH antagonist multiple dose protocol (MDP) in poor responders undergoing IVF/intracytoplasmic sperm injection (ICSI). 방법: In this prospective randomized study total of 90 poor responders who were scheduled for IVF/ICSI were enrolled and divided into the corifollitropin alfa group (study group) or the daily rFSH group (control group). The diagnosis of poor responder was based on the Bologna criteria of the 2011 ESHRE consensus. In all subjects, GnRH antagonist MDP was used for COS. 결과: There were no differences in patients` characteristics between the two groups. Duration of COS was comparable between the study and control groups. The numbers of oocytes retrieved and grade I or II embryos were also similar in the two groups. However, the number of mature oocytes was higher in the study group with a borderline significance (p< .07) and the ratio of mature oocytes among total oocytes retrieved was significantly higher in the study group of 78.6 ± 13.0%, compared with 61.2 ± 16.0% in control group (p< .001). There were no differences in the clinical pregnancy rate per cycle initiated, embryo implantation rate and miscarriage rate between the two groups. 결론: Corifollitropin alfa is at least as effective as daily rFSH treatment for COS using GnRH antagonist MDP, and may improve the synchrony of follicular development in poor responders undergoing IVF/ICSI. Therefore, corifollitropin alfa may be a feasible, patient-friendly alternative for poor responders.

한우 비육우 전업농가 시설투자한계 분석

김재환,김상우,조원모,강희설,조영무,Kim, Jae-Hwan,Kim, Sang-Woo,Cho, Won-Mo,Kang, Hee-Seol,Cho, Young-Moo 한국축산환경학회 1996 축산시설환경학회지 Vol.2 No.2

The objective of this study was to estimate the investment limit in equipment capital by Capital Recovery Method. The data used was collected from 23 Hanwoo(Korean Native Cattle) farms in 1994. The necessary time for herd size expansion was average 5 years from opening(9.7 heads) to 50 heads, 4 years from 50 to 100heads, 3 years from 100 to 150 heads, and 2 years from 150 to 200 heads, respectively. It took 14 years from opening to 200 heads of herd size. The debts for fattening cattle farms were 15.2million won for the size of 50 heads, 37.1 million won for the size of 100 heads and 89.0 million won for the size 200 heads, respectively. Average rates of debt interest were 5.1 % 7.2 and 10.8, correspendingly. As the hear size increased, debt interest rates also increased due to government funds limit. The investment limits in equipment capital perfarm household were 77.7 million won for 50 heads, 135.1 for 100 heads, and 294.3 for 200 heads for 5,500 won per kg liveweight, 70.7 million won for 50 heads, 122.6 for 100 heads and 269.3 for 200 heads for 5,000 won per kg liveweight, 63.6 million won for 50 heads 110.0 for 100 heads and 244.2 for 200 heads for 4,500 won per kg liveweight.

Magnetic resonance imaging of the canine brain at 7 T.

Kang, Eong-Teck,Ko, Ki-Jin,Jang, Dong-Pyo,Han, Jae-Yong,Lim, Chae-Young,Park, Chul,Yoo, Jong-Hyun,Kim, Ju-Won,Jung, Dong-In,Kim, Young-Bo,Woo, Eung-Je,Cho, Zang-Hee,Park, Hee-Myung The College 2009 Veterinary Radiology and Ultrasound Vol.50 No.6

<P>The purpose of this study was to describe relevant canine brain structures as seen on T2-weighted images following magnetic resonance (MR) imaging at 7 T and to compare the results with imaging at 1.5 T. Imaging was performed on five healthy laboratory beagle dogs using 1.5 and 7 T clinical scanners. At 1.5 T, spin echo images were acquired, while gradient echo images were acquired at 3 T. Image quality and conspicuity of anatomic structures were evaluated qualitatively by direct comparison of the images obtained from the two different magnetic fields. The signal-to-nose ratio (SNR) and contrast-to-noise ratio (CNR) were calculated and compared between 1.5 and 7 T. The T2-weighted images at 7 T provided good spatial and contrast resolution for the identification of clinically relevant brain anatomy; these images provided better delineation and conspicuity of the brain stem and cerebellar structures, which were difficult to unequivocally identify at 1.5 T. However, frontal and parietal lobe and the trigeminal nerve were difficult to identify at 7 T due to susceptibility artifact. The SNR and CNR of the images at 7 T were significantly increased up to 318% and 715% compared with the 1.5 T images. If some disadvantages of 7 T imaging, such as susceptibility artifacts, technical difficulties, and high cost, can be improved, 7 T clinical MR imaging could provide a good experimental and diagnostic tool for the evaluation of canine brain disorders.</P>

EFFECTS OF COLLISIONAL DE-EXCITATION ON THE RESONANCE DOUBLET FLUX RATIOS IN SYMBIOTIC STARS AND PLANETARY NEBULAE

Kang, Eun-Ha,Lee, Hee-Won The Korean Astronomical Society 2008 Journal of The Korean Astronomical Society Vol.41 No.3

Resonance doublets including O VI 1032, 1038, NV 1239, 1243 and C IV 1548, 1551 constitute prominent emission lines in symbiotic stars and planetary nebulae. Spectroscopic studies of symbiotic stars and planetary nebulae from UV space telescopes show various line ratios of these doublets deviating from the theoretical ratio of 2:1. Using a Monte Carlo technique, we investigate the collisional de-excitation effect in these emission nebulae. We consider an emission nebula around the hot component of a symbiotic star characterized by the collisional de-excitation probability $p_{coll}\;{\sim}\;10^{-3}\;-\;10^{-4}$ per each resonance scattering, and the line center optical depths for major resonance doublets in the range ${\tau}_0\;{\sim}\;10^2\;-\;10^5$. We find that various line ratios are obtained when the product $p_{coll}{\tau}_0$ is of order unity. Our Monte Carlo calculations show that the flux ratio can be approximately fitted by a linear function of ${\log}{\tau}_0$ when ${\tau}_0p_{coll}\;{\sim}\;1$. It is briefly discussed that this corresponds to the range relevant to the emission nebulae of symbiotic stars.

Clinical Research Article : Sluggish decline in a post-transplant model for end-stage Liver disease score is a predictor of mortality in Living donor Liver transplantation

( Won Jung Hwang ),( Joon Pyo Jeon ),( Seung Hee Kang ),( Hyun Sik Chung ),( Ji Yong Kim ),( Chul Soo Park ) 대한마취과학회 2010 Korean Journal of Anesthesiology Vol.59 No.3

Background: The pre-transplant model for end-stage liver disease (pre-MELD) score is controversial regarding its ability to predict patient mortality after liver transplantation (LT). Prominent changes in physical conditions through the surgery may require a post-transplant indicator for better mortality prediction. We aimed to investigate whether the post-transplant MELD (post-MELD) score can be a predictor of 1-year mortality. Methods: Perioperative variables of 269 patients with living donor LT were retrospectively investigated on their association with 1-year mortality. Post-MELD scores until the 30th day and their respective declines from the 1st day post-MELD score were included along with pre-MELD, acute physiology and chronic health evaluation (APACHE) II, and sequential organ failure assessment (SOFA) scores on the 1st post-transplant day. The predictive model of mortality was established by multivariate Cox`s proportional hazards regression. Results: The 1-year mortality rate was 17% (n=44), and the leading cause of death was graft failure. Among prognostic indicators, only post-MELD scores after the 5th day and declines in post-MELD scores until the 5th and 30th day were associated with mortality in univariate analyses (P<0.05). After multivariate analyses, declines in post-MELD scores until the 5th day of less than 5 points (hazard ratio 2.35, P=0.007) and prolonged mechanical ventilation ≥24 hours were the earliest independent predictors of 1-year mortality. Conclusions: A sluggish decline in post-MELD scores during the early post-transplant period may be a meaningful prognostic indicator of 1-year mortality after LT. (Korean J Anesthesiol 2010; 59: 160-166)

Comparison of the Effects of Etomidate and Propofol on Redistribution Hypothermia during General Anesthesia

( Hee Pyoung Park ),( Jong Man Kang ),( Young Tae Jeon ),( In Yong Choi ),( Yong Seok Oh ),( Jung Won Hwang ) 대한마취과학회 2006 Korean Journal of Anesthesiology Vol.50 No.6

Background: Redistribution hypothermia can be modified by the effects of induction anesthesia on the systemic vascular resistance. This study compared the effects of etomidate and propofol on redistribution hypothermia during general anesthesia. Methods: Forty patients were randomly allocated into one of two groups, based on the induction agent used: Group E (n = 20) received 0.2 mg/kg of etomidate and group P (n = 20) received 2.5 mg/kg propofol. After intubation, anesthesia was maintained with sevoflurane and 50% nitrous oxide in oxygen in both groups. The core and peripheral temperatures were measured, and the peripheral temperature gradients (forearm minus fingertip) were used as an index of an arteriovenous shunt. Results: The patients in both groups demonstrated intense vasoconstriction prior to the induction of anesthesia with similar skin-temperature gradients. After induction, group P showed more rapid and significant vasodilation than group E (P = 0.02). The difference in vasodilation between the two groups disappeared from 5 minutes after intubation. The pre-induction core temperatures were similar in both groups. After induction, the core temperatures in group P were consistently lower than those in group E (P < 0.01). The core temperatures during the first hour of anesthesia decreased by 1.5 ± 0.4℃ in group P but only by 0.9 ± 0.4℃ in group E. Conclusions: Propofol caused more rapid and aggravated redistribution hypothermia during surgery than etomidate due to the earlier arteriovenous shunt vasodilation. (Korean J Anesthesiol 2006; 50: S 19~24)

Transduced Tat-α-Synuclein Protects against Oxidative Stress In vitro and In vivo

( Hee Soon Choi ),( Sun Hwa Lee ),( So Young Kim ),( Jae Jin An ),( Seok Il Hwang ),( Dae Won Kim ),( Ki Yeon Yoo ),( Moo Ho Won ),( Tae Cheon Kang ),( Hyung Joo Kwon ),( Jung Hoon Kang ),( Sung Woo C 생화학분자생물학회 2006 BMB Reports Vol.39 No.3

A case of infantile digital fibromatosis treated with topical tacrolimus

( Hee Joo Yang ),( Hyun Ji Kang ),( Woo Jin Lee ),( Sung Eun Chang ),( Mi Woo Lee ),( Jee Ho Choi ),( Chong Hyun Won ) 대한피부과학회 2021 대한피부과학회 학술발표대회집 Vol.72 No.2

Development of New Solitary Retinoblastoma Tumors during and after Chemotherapy

Won Jong Choi,Dong Hyun Jo,Hyoung Jin Kang,Hee Young Shin,Young Suk Yu,Jeong Hun Kim 대한안과학회 2021 Korean Journal of Ophthalmology Vol.35 No.1

Purpose: To review the occurrence of new solitary tumors during and after intravenous chemotherapy against retinoblastoma. Methods: From 115 eyes of 78 patients with a diagnosis of intraocular retinoblastoma who underwent intravenous chemotherapyand focal treatment without prior treatment, patient demographics, age at diagnosis, laterality, classification(Reese-Ellsworth and International Classification of Retinoblastoma), and treatment options were recorded. In addition, theoccurrence of small tumors during and after chemotherapy was documented with a detailed review of medical records andfundus photographs. Results: Of a total of 115 eyes of 78 consecutive patients, new solitary tumors were observed in 50 eyes (50 / 115, 43%) of40 patients (40 / 78, 51%). Multinominal logistic regression analyses showed that age at diagnosis (before 1 year) and vitrealseeding at diagnosis were linked to the development of isolated and miliary tumors, respectively. Kaplan-Meier analysesdemonstrated that all small tumors developed with 20 months from the start of chemotherapy. Twenty-eight eyes (28 / 34,82%) were salvaged with additional focal treatment in 34 eyes with isolated tumors. Conclusions: Small tumors were observed during and after chemotherapy against retinoblastoma in patients who underwentintravenous chemotherapy and focal treatment. It is necessary to promptly identify and address small tumors for thepreservation of eyeball and vision.