• 농업과학연구
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• 제37권3호
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• pp.471-479
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• 2010

Forest roads of 16,424km have been constructed as infrastructure for efficient management of forest. The demand of forest road have been also increased steadily with SOC conception for forest management and wood production. But, accuracy verification by completion drawing of forest road needed aspects extration of geographic information to sound like forest road construction and completion drawing. However, verification for completion drawing has not ascertained. This study carried out the evaluation for position accuracy about constructed forest road in Chungcheongnam-do for evaluating horizontal position accuracy of completion drawing of forest road. In result, first of distance of completion drawing and real route designed completion drawing longer than the real route as Gongju 83m, Seosan 66m, Nonsan 27m and Dangjin 19m, respectively. Second, RMSE by point-correspondence was 11m~14.7m, buffering analysis appeared difference of 18~24m. Finally, index of shape was the similar completion and real route through 6.5~7.4 and data information of forest road corresponds to be perfect. For such reasons, the existing completion drawings have a problem that it cannot use graphic information for drawing digital map according to the regulation, and there is an urgent need for improvement to solve this problem in the process of design and construction.

• 지구물리
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• 제5권2호
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• pp.153-161
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• 2002

한반도 지각규모 굴절법 조사를 위한 발파 예정지를 결정하기 위하여, 충남 서산의 간척지 2 곳에서 탄성파 굴절법을 실시하여 지하 속도구조를 규명하였다. 골재 채취장과 이 곳에서 동쪽으로 약 2km 지점에 위치한 매립된 논에서 24채널 2m 간격의 굴절법 조사를 각각 46m 씩 실시하였다. 토모 그래피 역산법을 이용하여 구한 속도단면은 골재 채취장에서 속도 3,900m/s 이상의 신선한 기반암이 6m 정도의 깊이에 위치하여 이상적인 발파 장소로 판단된다. 그러나 매립된 논에서는 기반암의 풍화 정도가 상대적으로 심하고, 풍화대 하부의 기반암 속도도 2,400 m/s 정도로 낮은 편이며, 15m 정도로 깊게 위치하고 있어서 골재 채취장보다 이상적인 장소가 아닌 것으로 판단된다.

• 지구물리
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• 제5권2호
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• pp.87-97
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• 2002

기상청 광대역 관측소에서 2000~2001년 포착된 원거리 지진들의 종파 초동 시간의 상대적 도달 시간차이를 분석하여 관측소 하부 지각구조차이에 의한 평균 도달시간이상을 도출하였다. 각 광대역 지진 관측소에서 측정되어진 종파의 상대적 도달시간차이들은 최대 1.5 초로 측정되었다. 각 관측소들의 평균적인 도달시간이상은 최대 0.6초의 차이를 보이며 향후 지진요소 결정 시 이런 차이를 보정하여 주면보다 정밀한 지진요소를 산출할 수 있을 것이다. 각 관측소의 속도 대비차원에서는 최대-4~4%의 속도 대비를 가질 수 있는 것으로 추정되었다. 전반적으로 서울, 춘천, 강릉, 울진, 그리고 울릉도 광대역 관측소에서는 상대적으로 0.05~0.3초 늦은 평균도달시간 이상을 보이며 속도대비로는 0~4% 늦은 것으로 계산되었다. 한편 서산, 대전, 광주, 대구, 서귀포, 그리고 부산 광대역 관측소에서는 0.05~0.3초 빠른 평균도달시간 이상을 보여주며 속도대비로는 약 0~4% 빠른 것으로 계산된다.

• 한국식물병리학회지
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• 제14권3호
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• pp.253-259
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• 1998

Effects of soil disinfection, fungicide application, and narrow ridge cultivation on ginger rhizome rot development were examined in two naturally-infested fields at Seosan, Choongnam province. Soil disinfection treatments were assigned to main plots, and fungicide and ridge treatments to sub-plots in a split plot design with three replications. The rhizome rot started in late July, and progressed rapidly until late September with the peak incidence in mid-august to early September. Soil disinfection by dazomet application showed the most prominent inhibition effects in both fields, where the disease was reduced by the treatment from 17.5% to 4.8% in one field, and from 51.0% to 2.2% in the other field. Three to five applications of fungicide metalaxyl-copper during the growing season inhibited the disease by 89.7% in one field, but less effectively in the other field. Narrow ridge cultivation reduced the disease effectively by 78.1% and 63.9%, compared to the unridged control plots in each field, respectively. Germination rate of seed-rhizomes and growth of ginger plants were similar between treatments, except when the plots received improper aeration after applying dazomet, and then the germination rate was significantly reduced. The greatest yields were obtained in the disinfected plots, regardless of rhizome rot incidence, except one control plot with very little disease. Ginger yield was negatively correlated with disease severity. However, the yield of ridge plots averaged 58∼59% compared to those of the unridged plots, due mainly to the half planting rate of the ridge plots. In spatial progress, the disease in the disinfected plots started from a single focus of the inoculum, and spread into the adjacent areas only, whereas in the untreated plots, the disease started from many foci that were distributed over the plot, and rapidly progressed to make an epidemic during the season. The soil density of P. myriotylum in the disinfected plots was not changed or, if not, increased slightly during the season. However, in the untreated plots it increased rapidly to reach the density 3 to 5 times greater by the end of the season.

• 한국지역사회생활과학회지
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• 제21권3호
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• pp.351-364
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• 2010

This study was aimed to investigate the relationship between abuse and suicide risk focused on the Korean elderly over 65 years old living with their families. The data for the study was collected from 1,193 people in Incheon metropolitan city, Kyunggi and Chungnam province. Among them, 711 elderly adults who experienced abuse within their families, were analysed for the study. The results were as follows: First, the group who had experienced abuse was revealed at 29.8%, and the group who had experienced suicide was revealed at 23.1%. Second, the victims of abuse at older ages affects the risk of suicide. Moreover, considering the elderly population under the control of influencing variables such as socioeconomic traits, ADL and depression, the risk of suicide for the group of being abused was higher than the group that was never abused. Third, four groups of elderly(groups without both abuse and suicide risks, the group with only abuse victims, the group with only suicide risks, and the group with both abuse and suicide risk) were divided based on the victims of abuse and the risk of suicide. The group without abuse and suicide risk was positive in subjective economic status, ADL, number of diseases and depression. On the contrary, the group with both abuse and suicide risk was negative in the above indices. The study indicated that there were some similar traits between abuse risk groups and suicide risk groups, but the group with suicide risk was lower than the group with abuse risk in ADL and depression.

• Journal of Preventive Medicine and Public Health
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• 제35권1호
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• pp.72-75
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• 2002

Objectives : To evaluate the health hazards in the underground storage facilities of ginger roots. Methods : The authors reviewed the emergency rescue records from the Seosan fire department over the period Jan 1, 1996 to Aug 31, 1999. The atmospheres in 3 different underground storage locations were analyzed for $O_2,\;CO_2,\;CO,\;H_2S\;and\;NH_4$. Results : From the emergency records, we were able to identify 20 individuals that had been exposed to occupational hazards in the underground storage facilities. Among these 20 cases, 13 were due to asphyxiation (resulting in f deaths) and 7 were due to falls. In the first atmospheric tests, peformed on Feb 25, 1998, the O2 level inside the underground storage facility, located about $5{\sim}6$ meters below the surface, was 20.6% and the $CO_2$ level was about 1,000 ppm. CO, $H_2S\;and\;NH_4$ were not detected. In the second tests on Jul 6, 1999, measurements of the $O_2$ level at 3 meters below the surface in two different storage locations were 15.3 and 15.1%. And the $O_2$ levels inside the storage facilities were 12.2 and 12.1%. The $CO_2$ level was above 5,000 ppm (beyond upper limits of measurement). CO, $H_2S\;and\;NH_4$ were not detected. Conclusions : We conclude that asphyxiation in the underground storage facilities for ginger roots was not due to the presence of toxic gases such as CO, $H_2S\;and\;NH_4$, but rather the exclusion of oxygen by carbon dioxide was responsible for causing casualties. For the development of a hazard free working environment, safety education as well as improvements in storage methods are needed.

• 농촌계획
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• 제16권4호
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• pp.53-60
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• 2010

This study aims at suggesting the attributes and limitations of each methods through the evaluation of the verified analysis results, so that it will be possible to select an efficient method that may be applied to assess the green coverage ratio. Green coverage areas of each sites subject to this study were assessed utilizing the following four methods. First, assessment of green coverage area through direct planimetry of satellite images. Second, assessment of green coverage area using land cover map. Third, assessment of green coverage area utilizing the band value in satellite images. Forth, assessment of green coverage area using and land cover map and reference materials. For this study, four urban zones of the City of Seosan in Chungcheongnam-do. As a result, this study show that the best calculation method is the one that combines the merits of first and second methods. This method is expected to be suitable for application in research sites of middle size and above. It is also deemed that it will be possible to apply this method in researches of wide area, such as setting up master plans for parks and green zones established by each local self-government organizations.

• 한국산업보건학회지
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• 제28권2호
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• pp.222-229
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• 2018

Objectives: The aim of this study was to evaluate gas concentrations such as oxygen in ginger storage tunnels, which are the causes of asphyxiation in confined spaces and suggest directions for safety and health management at ginger farms. Methods: Five farms in the Seosan and Taean areas which use underground ginger storage tunnels were chosen and examined with a walk-through survey and direct reading device for oxygen, hydrogen sulfide, ammonia, and carbon monoxide. Results: The oxygen concentration in the storage tunnels with no ventilation was found to be under 18% in summer, which may cause health effects. The concentration in those with ventilation was about 19%. The difference in temperature by measurement day had little effect on the concentration of oxygen. Conclusions: Even though some of farms had used compulsory ventilation systems, none of the farms visited possessed any direct reading device for oxygen. Warning systems using a direct reading device can be more effective, helpful, and required compared to ventilation, considering the difficulty and expense of periodical maintenance of ventilation systems and the fact that a farmer can be placed in danger when unaware of the malfunction of the ventilation system. In addition, a warning system may make farmers more cognitive of agricultural safety and health actions while a ventilation system can cause them to become passive and ignorant of workplace hazards.

• 박물관보존과학
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• 제23권
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• pp.91-108
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• 2020

본 연구는 천안, 공주, 서산, 익산, 나주, 합천에서 출토된 금동관 7점을 중심으로 비파괴 분석법을 활용하여 재질 특성을 조사하였다. 금동관은 고깔 모양의 모관을 기본으로 하며, 전·후입식, 대롱, 수발, 영락 등의 장식을 가감하여 부착된다. 문양은 용문, 봉황문, 초화문, 타출문 등을 조금기법, 투조기법, 인각기법 등으로 시문하였다. 형태적 특징은 제작시기 및 출토 지역에 따라 차이를 보인다. 소지 금속은 순동과 소량의 납이 포함된 동으로 구분된다. 표면 도금은 아말감기법을 사용하였으며, 순금과 소량의 은이 함유된 금으로 분류된다. 옥전 23호 출토품의 은 함량이 높아 지역적인 차이를 보인다. 도금 두께는 백제 금동관에 비해 백제계 금동관인 옥전 23호분이 두꺼운 것으로 평가된다. 도금횟수는 1~2회인 반면 백제계 금동관인 합천 옥전 23호분 금동관은 최대 3회로 평가되며, 차이를 보이는 것을 알 수 있다.

• 한국해안해양공학회지
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• 제10권4호
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• pp.151-164
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• 1998

서산 A·B지구 간척사업에 따른 방조제 축조에 따라 야기되는 천수만 내 조석현상 변화를 파악하기 위하여 수심적분 2차원 해수유동 수치모형실험을 실시하였다. 외해 개방경계조건을 확보하기 위하여 3개 지점에서 조석관측을 실시하였고 수치모형의 검증을 위하여 천수만 내 2개 지점에서 조류관측을 실시하였다. 수치모형 실험결과는 관측된 조류를 기준으로 할 때, 북부해역, 백사수도, 중부해역, 남부해역의 순으로 유속의 감소가 크게 나타났다. 방조제 건설 후 천수만 북부에서 조간대 노출이 발생하는 시각은 약 51분 정도 빨라졌으며, 노출시간은 23분 정도 길어진 것으로 나타났다. 고조 발생 시각은 1시간 정도 앞당겨졌으며, 고조 수위는 15 cm 정도 낮아졌다.