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.

주요우울증이 근로자의 생산성에 미치는 영향 : WHO-HPQ(Health and Work Performance Questionnaire)를 이용한 예비연구

김원,황태연,함병주,이준석,최병휘,김세주,서용진,강은호,우종민 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.6

Objectives : Major depressive disorder (MDD) causes patients' distress and makes socioeconomic burden, both directly and indirectly. We used the concept of lost productive time (LPT) to estimate the indirect costs and calculated both absenteeism and presenteeism among workers with MDD. Mcthods : Depression group was recruited from workers visiting psychiatric outpatient clinic who had MDD without major physical or mental disorders (N= 106). Age and sex matched healthy control group was also recruited through advertisement (M=100). All participants completed a interview using WHO Health and Work Performance Questionnaire (HPQ), Job Stress Measurement Scale for Korean Employees, and Hamilton Rating Scale for Depression. Statistical analysis was performed with independent t-test or χ² test as characteristics of values (p=0.05). Results : The number of absence (0.94-day/month vs. 0.10-day/month, P=0.015) andthe numberofearly leaving (2.56-day/month vs. 0.24-day/month, P<0.001) were significantly higher in the depression group. Depression group evaluated their Perfor-mance level much lower than controls with significant value (5.16 vs. 7.62, P<0.001). In addition, depression group estimated their performance level during the last 4 weeks lower compared to the level of past 1-year (5.16 vs 6.63, P<0.001). The estimated costs of absenteeism in depression group were higher than controls by 2,520,000 Korean Won per year, and those of presenteeism were also higher by 4,880,000 Korean Won per year. The total costs of LPT in depression group were higher than controls by 7,400,000 Korean Won, which corresponds to 26% ofmean annual salary. In addition, the level of occupational stress, such as high demand and interpersonal conflict, was higher in the depression group. Conclusion : Major depressive disorder costs substantial productivity loss to workers and their company. Presenteeism imposes more time cost than absenteeism. Effectiveness trials are needed to devise cost-effective programs for the early detection and treatment of depression at the workplace.

水稻 이양전작(春播) 靑刈 옥수수의 경제성 조사

金基元,徐大振,姜奉泰 진주산업대학교 1972 論文集 Vol.9 No.-

1. The weather condition was good and the cost of producing 7,600Kg/wa of soiling corns was 3,911 Won 2. Appreciate value per Kg was 51 Won, labor-expense was 3,38won, fertilizer-expense 0,16 Won and productive quantity per invested labor-hour was 118Kg, 3. Forage quantity to purchase with the expense of soiling coiling corns sold is as follows:barley is 156,4Kg, corns are 88.3Kg, wheat bran is 165.7Kg, wheat 114.0Kg and nou-fatdrid ricebran is 23.42Kg. 4. After-farming growth and harvest quantity were not different, but the damage of disease was slightly more.

법조동사의 심층적 특성

姜太元 대구효성가톨릭대학교 1985 연구논문집 Vol.31 No.1

KAL기 추락에 의한 대량재해의 개인식별

강신몽,이원태,고영창,최상규,김윤희,이홍석,서재관,윤중진,이혜경,최득린,김종열,윤창육,변명식,이장홍 大韓法醫學會 1991 대한법의학회지 Vol.15 No.2

Individual identification is an important part in medicolegal field especially in mass disaster. At July, 27, 1989, KAL KE-803 was crashed on landing at Tripoli International Airport, Liba. The plane was caught in fire and sixty eight Koreans were sacrified. The majority of victims were severely charred and injured. The authors examed all dead bodies and successfully identified all the cases through visual, anthropological, odontological, radiological and pathological methods including fingerprint and blood typing.

급성 림프구성 백혈병 환자에서 아스페르길루스 감염을 동반한 호중구감소성 소장결장염에 의한 작은창자 천공

강동백,임태수,박원철,윤기중,이정균 圓光大學校 醫科學硏究所 2008 圓光醫科學 Vol.23 No.2

저자들은 급성 림프구성 백혈병 치료 도중 아스페르길루스 감염을 동반한 호중구감소성 소장결장염에 의한 작은창자 천공을 경험하였다. 급성 림프구성 백혈병의 항암화학치료 중 발생 할 수 있는 호중구감소성 소장결장염은 다양한 위장관 증상을 보일 수 있으며, 이에 대한 발생 가능성을 고려하여 적극적인 조 기진단과 이에 대한 적극적 치료가 필요하며, 면역기능의 저하로 아스페르길루스 등의 진균 감염이 발생할 수 있으므로 호중구감소성 소장결장염의 치료에 증상의 호전이 없을 때 항진균제를 포함한 광범위한 치료가 고려되어야 한다. Though advancesin imumosuppressive therapy or chemotherapy which have lead to increased survival of leukemia and transplant patient, but the risk of infectious complication has been increasing. Neutropenic enterocolitis is a life threatening complication of chemotherapy for malignancies such as leukemia or lymphoma. Symptoms of neutropenic enterocolitis are nonspecific and it may rapidly lead to intestinal peforation. Aspergilus infection could involve the gastrointestinal tract as a result of neutropenia and mucosal injury after imumosuppressive therapy, chemoetherapy, or antibiotics use, but rarely reported a small bowel perforation combined aspergillus and neutropenic enterocolitis. We present a rare case of ileal perforation caused by neutropenic enterocolitis combined with aspergillus infection during chemotherapy for acute lymphocytic leukemia with a review of the literature.

한라산 1100고지에서 채취한 대기 에어로졸 조성의 계절적 변화에 관한 연구

강창희,한지숙,김태행,김원형,박용이 濟州大學校 基礎科學硏究所 1997 基礎科學硏究 Vol.10 No.1

The atmospheric aerosols have been collected with aerosol sampler installed at 1100m site located at Halla mountain in Cheju island for about 124 days from August 15, 1996 to May 3, 1997, and their compositions have been analyzed in order to investigate the seasonal variation of aerosol compositions and the characteristics of aerosols. The correlation coefficients for the sum of the cation and anion equivalent concentrations showed the values between r=0.911 and r=0.977, and it has been found that the precision of the analytical data was with good satisfaction. The amounts of total suspended particulates(TSP) were in the range of 19.9∼28.6μg/㎥ with the highest concentrations in Spring season due to the yellow sand effect. The average concentrations of water-soluble cations were in the order of NH₄ +>Na+>Mg²+>K+>Ca²+ during the summer, fall and winter seasons, but NH₄+>Ca ²+>K+>Na+>Mg²+ during the spring season. The average concentrations of anions were in the order of SO₄->NO₃->Cl- for the all seasons. The concentrations of SO₄²- and NO₃- showed a high increase through winter and spring seasons due to the effect of the north-west wind, which were 5.95∼6.05μg/㎥ and 1.41∼1.60μg/㎥ respectively. And the Ca²+, the major component of soil, showed a high concentration value of 0.47μg/㎥ in yellow-sand spring season. In the effect of sea-salt with the enrichment factors, the SO₄²-, Ca²- and K+ were found to be flown to the air due to the other factors rather than sea-salt effect. And in the effect of soil with the enrichment factors, the SO₄²-, NO₃-, Cl- and NH₄+ were found to be introduced to the air through the other paths but the soil itself.

성인의 급성 심장사에서 정상 심장례의 분석

강신몽,이원태,이한영,서중석,최영식,권일훈,정낙은 大韓法醫學會 2000 대한법의학회지 Vol.24 No.2

The authors analysed 53 cases of sudden cardiac death(SCD) without prominent structural abnormalies of heart out of witnessed 300 cases. Thirty four cases were associated with sleep and 19 with activity or rest. Twenty one cases were classified as having normal hearts, and the rest as structurally mild abnormal ones. Male was predominant, and almost of the victims were suffered in their twenties or thirties. All cases collapsed instantaneously or in very short time with various and not specific terminal symptoms. Inducing or trigger factors are not clarified in almost of the cases. Mechanisms or causes of death could not be defined clearly. We concluded that careful heart examination with detailed clinical history under the appropriate postmortem investigation system is only effective approach for the true mechanism and cause of death.

경사 유동층 반응기내에서 석탄의 유동특성 연구

강태원 公州大學校工科大學生産技術硏究所 1998 論文集 Vol.6 No.-

The final objective of this research is to develope the IFB(Inclined Fluidized Bed) coal dryer. For the initiation of this development, following research activities are conducted to investigate the fluidization characteristics of coal in the IFB: 1)characterization of two feed coals(High moisture subbituminous coal form AMAX Eagle Butte mine located in the Powder River Basin of Wyoming and from Ushibelli Coal Mine, Inc. in Healy, Alaska); 2)determination of minimum fluidization velocity for each crushed feed coal; and, 3)investigation of solids bed geometry in IFB as it relates to the feed coals, IFB reactor slope, and the fluidizing gas-to-solids ratio. Chemical analysis of the two coals indicate that they are similar in nature. However, subsquent physical characterization of the crushed feed coals indicate different physical properties. When crushed, Eagle Butte coal produces more fine particles than the Ushibelli coal. This observed difference in particle size distribution result in the MFVs(Minimum Fluidization Velocities) of the two coals, and differences in the MFVs result in the development of solids bed with differing geomettires. Under the experiment with a wide variety of fluidizing gas-to-solids ratios, we found that the production of entraind solids from the fluidized-bed reactor can be kept 10 wt% of the feed coal by reducing the fluidizing gas-to-solids ratio in the IFB reactor below 3lb/lb.

공원묘지 유실에 의한 대량재해의 개인식별

강신몽,이한영,윤중진,이원태,김종열,이영석,서재관,최득린,서지석,이혜경 大韓法醫學會 1992 대한법의학회지 Vol.16 No.1

Individual identification of severely decomposed or skeletonized bodies is an important part in medicolegal field. 142 bodies were torn up and carried away by flood in a park cemetry, Kwang-Ju, Kyunggi province, Korea at Sept., 10, 1990. The authors examed the 56 bodies, which were gained, through medical, anthropological, odontological, radiological methods, and superimposition for individual identification. Among them, 41 cases were successfully identified, and remaining 15 cases were not identified because of sever destruction and no adequate information.