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.

RE-4 : 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.

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

Endoscopy and Imaging Modalities/Basic Science of Gastrointestinal Disorders/Miscellaneous : The Usefulness Of CT Colonography As Postoperative Follow-Up Surveillance Study In Stomach Cancer Patients

( Won Seok Kang ),( Joon Seok Lim ),( Jae Hee Cheon ),( Yong Chan Lee ),( Won Ho Kim ),( Sang Kil Lee ) 대한소화기학회 2007 SIDDS Vol.9 No.-

Background/Aims: Stomach cancer is the most common from of cancer, and is the second leading cause of cancer related death in Korea. 3.4% of stomach cancer patients have synchronous of metachronous cancer with colorectal cancer as the most common type (0.6%). Patients with stomach cancer might carry a high risk for colorectal cancer that requires surveillance colonoscopy. CT colonography (CTC) provides for effective and relatively noninvasive risk stratification as a method for colon cancer screening. This study aims at determining the usefulness of CTC as a postoperative follow-up surveillance study after stomach cancer surgery. Methods: From May 2006 to April 2007, contrast-enhanced CTC was performed in Yonsei University severance Hospital for detection of recurrent lesions in 410 consecutive patients (275 male, 135 female) who have had surgery for stomach cancer CTC interpretation was performed with primary three-dimensional polyp detection. Patients with polyp(s) measuring 6mm or larger were referred for optical colonoscopy (OC). Results: Of 410 stomach cancer postoperative patients, recurrence of stomach cancer was not noted and 45 colorectal polyp(s) were detected on CTC in 36 (8.8%) patients. OC was recommended in these patients and concordant lesions were identified in 27 (60.0%) of 45 polyps. Eighty-six polyps were detected on OC in 31 patients, and no polyps were detected on OC in 5 patients. Four colorectal carcinomas were detected in 4 patients CTC. Sensitivity and positive predicitive value of CTC for polyp detection were 60.0% and 62.8%, respectively. Total 46 polyps were missed on CTC. The most common site of missed polyps was sigmoid colon. Eighteen (39.1%) were larger than 6 mm and 1 carcinoma was included in the missed polyps. Conclusion: For patients who have undergone surgical treatment for stomach cancer, CTC is clinically useful as their follow-up surveillance study. However, more efforts are needed to find the ways to improve the low sensitivity of CTC.

Effects of Propolis on Sperm Function in Frozen-thawed Boar Semen

Won-Hee Lee,Dong-Jae Jang,Yong Hwangbo,Byeong-Buhm Kang,Hee-Tae Cheong,Boo-Keun Yang,Choon-Keun Park 한국동물생명공학회(구 한국동물번식학회) 2017 Reproductive & Developmental Biology(Supplement) Vol.41 No.2

The aim of this study was to evaluate effect of Propolis on viability, acrosome reaction and mitochondrial intact in frozen-thawed boar sperm. The boar semen was collected by gloved-hand method and cryo-preserved in 11% lactose with 20% egg yolk (LEY) and Triladyl containing propolis (0, 10, 30, and 50 ng/mL) with 0.05% ethanol. Cryo-preserved boar sperms was thawed at 37.5℃ for 45 sec in water-bath. Sperm viability, acrosome reaction, and mitochondrial intact were analyzed using flow cytometry. In results, viability of frozen-thawed sperm, which was cryo-preserved using LEY and triladyl, was decreased in 0, 30, and 50 propolis treatment groups. However, there was no significant difference. Acrosome reaction and mitochondrial intact of sperm was not influenced by all of propolis treatment using both of freezing extender. Motility of frozen-thawed sperm with LEY containing 10 ng/mL propolis was significantly higher than in 0, 10, and 50 ng/mL propolis treatment groups (p<0.05), whereas there was no significant difference compared to control. Especially, 0 and 30 ng/mL propolis treatment groups were significantly decreased compared to control (p<0.05). Similar to result in frozen-thawed sperm with LEY, motility of frozen-thawed sperm with triladyl was significantly increased in 10 ng/mL propolis treatment groups compare to control and other propolis treatment groups (p<0.05). In conclusion, 10 ng/mL propolis improves mobility in frozen-thawed boar sperm with LEY and triladyl, whereas 30 and 50 ng/mL propolis reduced motility. But, the addition of propolis during cryopreservation did not influence to the membrane function of frozen-thawed spermatozoa. Therefore, it is necessary to continue the study on the effects of propolis on boar spermatozoa during cryopreservation.

Effect of multilayer structure on cyclic performance of Si/Fe anode electrode in Lithium-ion secondary batteries

Kang, Hee-Kook,Lee, Seong-Rae,Cho, Won Il,Won Cho, Byung The Royal Society of Chemistry 2013 Physical chemistry chemical physics Vol.15 No.5

<P>A buffer-strengthened Si/Fe multilayer film, consisting of amorphous silicon layers and polycrystalline Fe layers, is investigated as the anode for Li-ion batteries. This film can achieve a stable cycle-life performance with a high capacity. Decreasing the thickness of the Fe layer can lead to a higher capacity, which is related to the fast transport of the Li ion, but the cyclic performance deteriorates with repeated cycling. In contrast, increasing the thickness of the Fe buffer layers and the number of deposit stacks improves the cycle life with high reversibility. Because of the strain in the Si layers suppressed by the primary multilayer structure, the long-term strength is preserved and the substantial fracture toughness is enhanced by the increasing numbers of effective grain boundaries and interfacial layers. In addition, we demonstrate that the Ti underlayer promotes the electrochemical properties in the Si/Fe multilayer for various Fe layer thicknesses because of the enhanced adhesion of the interfacial electrode and current collector. The mechanically optimized Si/Fe multilayer films can have superior cycle-life performances and higher capacities. Notably, the 16-bilayer deposited electrode exhibits an excellent capacity retention of ∼95% with ∼204 mAh g<SUP>−1</SUP> over 300 cycles at a 1 C rate.</P> <P>Graphic Abstract</P><P>A buffer-strengthened Si/Fe multilayer film anode for Li-ion batteries by the increasing numbers of effective grain boundaries and interfacial layers relieves strain of a Si layer, which results in excellent stable cycle-life performance. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2cp42824e'> </P>

Trunk Muscles Strength as a Risk Factor for Nonspecific Low Back Pain: A Pilot Study

Kang Hee Cho,Jae Won Beom,Tae Sung Lee,Jun Ho Lim,Tae Heon Lee,Ji Hyun Yuk 대한재활의학회 2014 Annals of Rehabilitation Medicine Vol.38 No.2

Objective To investigate the effects of asymptomatic back muscle weakness and spinal deformity on low back pain (LBP).Methods Sixty healthy subjects without LBP participated in this study. Radiography and an isokinetic/isometric dynamometer were used to respectively measure spinal scoliosis/lordosis and the strength of the trunk flexors/extensors. After 2 years, 48 subjects visited the hospital again and LBP episodes, its severity and the Korean version of the Oswestry Disability Index were assessed. Differences between the group with LBP and the group without LBP were evaluated and the association with LBP incidence and severity was determined. Results Sex, age, and trunk strength were significantly different in both group. Sex and age were significantly positive associated with LBP incidence. The isometric trunk flexor and extensor strength, maximum isokinetic trunk flexor and extensor strength were significantly and negatively associated with the LBP severity. The maximum isokinetic trunk extensor and maximum isometric trunk extensor strength was significantly negative associated with the LBP incidence.Conclusion LBP incidence is associated with isometric and isokinetic trunk extensor weakness, whereas LBP severity is associated with age, sex, isokinetic trunk extensor and flexor weakness, isometric trunk extensor and flexor weakness.

Poster Session : The transcriptional repressors, Tup11 and Tup12, are the substrates of Lkh1, LAMMER kinase homolog, in Schizosaccharomyces pombe

( Won Hwa Kang ),( Hee Moon Park ) 한국생화학분자생물학회 (구 한국생화학회) 2006 생화학분자생물학회 춘계학술발표논문집 Vol.2006 No.-

A Convenient Synthesis of Polycyclic γ-Lactams via Pauson-Khand Reaction

Kang, Seok-Won,Kim, Yong-Hoon,Kim, Hea-Jeong,Lee, Joo-Hee,Kim, Sung-Hoon Korean Chemical Society 2009 Bulletin of the Korean Chemical Society Vol.30 No.3

Pauson-Khand reaction of hydroxyenynes with $Co_2(CO)_8$ in the presence of N-methylmorpholine N-oxide or trimethylamine N-oxide as a promoter produced polycyclic $gamma$-lactams as single stereoisomers in moderate to excellent yield. These are the first examples of an intramolecular Pauson-Khand reaction on a hydroxyenyne system tethered to a three- and four-membered ring as new skeletons with 5,6,5 fused ring systems.