This study tried to identify the effects of ergonomic risk factors for absence from work of fire fighters in Korea. A self-administered questionnaire was prepared for this study. The questionnaire consisted of several parts such as 'general information', 'work-related factors', 'physical & chemical risk factors', 'ergonomic risk factors', and 'absence information'. A total of 7,098 fire fighters participated in this study. The data obtained from the survey was mainly analyzed by logistic regression. A total of 856 out of 7,098 fire fighters experienced absence from work. The risk factors such as gender, age, marital status, education level, total work year, work area. position, job rotation, noise, dust, organic solvent, skin contact with chemical substance, toxic waste, regional vibration, manual material handling, continuous standing posture, awkward working posture were associated with absence from work. Specifically, awkward working posture and manual material handling from ergonomic risk factors were major risk factors for absence from work.

Natural environment and human activities in King George Island, South Shetland Islands in West Antarctica have been briefly reviewed, It is sure that human being can live a normal life in the Island, although the insufficiency in space and water resources might be a hampering factor to further human activities in the Island. It seems necessary to protect natural environment against the recent frequent visit of human beings to the Island.

분화활동에 따른 인간의 생리 및 감성변화를 알아보기 위해 20대 피험자 남녀 총 31명을 대상으로 뇌파, 심박변동성, SD(semantic differential)법을 실시하였다. 실험은 각각 10분씩 유리용기(지름 30cm)에 분화식물을 장식하는 작업, IT활동(문서 작성)하는 작업을 실시 하고 사전/후 측정하였다. IT활동(문서 작성)을 대조구로 하여 분화장식활동을 비교한 결과, IT활동보다 식물활동을 하였을 때 상대적 느 린 알파파(RSA)가 대부분의 측정지점에서 높게 나타났고, 알파/빠른 베타(RAHB)가 시각기능을 담당하는 두정엽(P3, P4)에서 높게 나타 나 스트레스나 긴장감을 거의 동반하지 않은 안정, 이완효과가 있는 것으로 나타났다. 또한 분화장식활동을 한 후보다 IT활동(문서작성)을 한 후 시각기능을 담당하는 상대적 빠른 알파파(RFA)가 좌반구 두정엽 (P3)에서 높게 나타나 몰입도가 높은 것으로 나타났다. 그러나 IT활 동(문서작성)보다 분화장식 활동을 했을 때 뇌활성도(SEF 90)가 좌반구 측두엽(T3), 우반구 후두엽에서 통계적으로 유의성있게 높게 나타 나 스트레스를 동반한 상태에서 고도의 집중력 효과가 있는 것으로 볼 수 있었다. 분화장식활동과 IT활동을 한 후 심박수의 차이는 거의 나 타나지 않았으나 IT활동보다 분화장식 활동에서 자율신경계활동 중 부교감신경계활성의 지표인 HF(high frequency)성분이 더 높게, 교감 신경계활성 지표인 LF(low frequency)성분은 IT활동보다 분화장식활동을 한 후에서 더 낮게 나타나 IT활동보다 분화장식활동이 안정감 을 갖는 경향을 보였으며 이러한 결과는 뇌파분석과 유사한 경향이었다. 분화장식활동과 IT활동에 따른 피험자 선호도는 분화장식활동 (4.00/5), IT활동(2.58/5)로 분화장식활동이 IT활동보다 통계적으로 유의성있게 높게 나타났다. 또한 SD 감성어휘조사에서 IT활동했을 때 보다 분화장식 활동을 했을 때 쾌적감, 자연감, 진정감이 유의성있게 높게 나타났다. 이는 분화장식활동이 IT활동보다 생리·심리적으로 안 정, 이완, 그리고 적절한 각성 상태에서 내적, 외적 주의집중력 향상 효과를 주는 것으로 해석할 수 있다. 따라서 식물을 활용한 분화장식활 동은 스트레스가 있는 대상자들에게 적용하는 것이 유용할 것으로 판단된다. 그러나 뇌활성도(SEF 90)이 IT활동보다 높게 나온 결과는 추 후 지속적 연구를 통해 긴장의 종류를 밝혀내야 할 것으로 생각된다.

The purpose of this study is to clarify the environmental changes and human activities before and after the fortification of the Seongsan Sanseong Fortress (hereinafter mountain fortress) in Haman through using pollen analysis. For this purpose, samples were taken at the Tr-2 site in the Warm-temperate forest. The results of the analysis are as follow. ① Before and after the fortification of the mountain fortress, the area around it has changed from a broad-leaved forest (The HS-I period) into a deciduous broad-leaved forest (The HS-II period) and finally into a the mixed conifer and deciduous broad-leaved forest (The HS-III period). ② The HS-I period (before the middle of the 6th century, compared to the nationwide pollen zone RIIIa during the Postglacial) was covered with cool-temperate southern forests(including some species of Warm-temperate trees) and was very similar to the current climate environment during the Gaya period before the fortification. ③ The HS-II period (mid to late 6th century, pollen zone RIIIa) was covered with typical cool-temperate southern forests after the fortification and the temperature was slightly lower than the first stage. ④ The HS-III period (7th~8th century/9th century, pollen zone RIIIb) is an era of clear human interference, causing the destruction of forests in earnest and paving an active agricultural life.

The problem of supply and transport of sediment from a mountainous catchment is very important in explaining dynamic geomorphology and the hydrological cycle. The discharge of suspended sediment is determined by a morphological system. Human interference to environment is also an important, not negligible factor in sediment production. Moreover, growing concern in recent years for the problems of nonpoint pollution and for the transport of contaminants through terrestrial and aquatic ecosystem,; has highlighted the role of sediment-associated transport in fluvial systems. This study was conducted in forested and quarried catchments in order to clarify the different discharge process and the mechanism of suspended sediment dynamics for each catchment. As a forested catchment, the Yamaguchi River catchment which drains a 3.12 ㎢ area was chosen. On the other hand, the Futagami River basin, which is formed by three subbasins (1.07, 1.59 and 1.78 ㎢), as a quarried catchment was selected. These catchments are situated to the north and east of Mt. Tsukuba, Ibaraki, Japan. The discharge pattern of suspended sediment from the Futagami River basin is more unstable and irregular than that from forested catchment, the Yamaguchi River catchment. Under the similar rainstorm conditions, suspended sediment concentration from quarried catchment during a rainstorm event increases from 43 to 27,310㎎/l. However, in the case of the forested catchment it changes only from nearly zero to 274 ㎎/l. Generally, the supply source of suspended sediment is classified into two areas, the in-channel and non-channel source areas. As a result of field measurements, in the case of the forested catchment the in-channel (channel bed, channel bank and channel margin) is the main source area of suspended sediment. On the other hand, remarkable sediment source area on the quarried catchmen, is the non-channel that is unvegetated ground.