• Korean Journal of Environment and Ecology
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• v.32 no.1
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• pp.66-76
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• 2018

This study surveyed the species and population of dragonflies in 20 study sites in the Junam wetland in May and July 2015 to investigate the relationship between the dragonflies and the inhabited environment. We measured the environmental factors such as the area of emergent plants, the area of floating and floating-leaved plants, the area of water surface, the area of water plants, and the nearby land-use type and analyzed the relationship to the dragonfly species, population, and diversity index. We found 757 dragonflies belonging to 21 species of 6 families. The area of floating and floating-leaved plants and the area of water surface affected the species diversity. The area of floating and floating-leaved plants and the area of surface water, in particular, showed the positive correlation with the species richness and the dominance value, respectively. The area of water surface showed the negative correlations with Shannon's diversity index and evenness. Among the type of surrounding land-uses, the dry fields and orchards showed significantly lower average species richness than wetlands. Among the species, Cercion calamorum and Crocothemis servilia were positively correlated with floating and floating-leaved plants. Cercion v-nigrum and Epophthalmia elegans were positively correlated with the area of water surface, and Ischnura asiatica and Ceriagrion nipponicum were negatively correlated. The recent uncontrolled proliferation of lotus colony in the Junam wetland is likely to affect greatly the species composition of dragonflies which have a close relationship with plant species.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.08a
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• pp.98-98
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• 2020

본 연구의 목적은 약재로 사용되는 천궁 중 토천궁(Ligusricum chuanxing Hort.)에 대한 지역별 생육환경을 확인하고 이에 따른 지상부 및 지하부 생장과의 상관관계를 규명하여 토천궁의 적정 재배지역 확인 및 지속 가능한 안정적인 한약재 생산에 대한 기초자료로 사용함에 있다. 토천궁이 주로 재배되고 있는 봉화군, 영양군, 평창군과 더불어 기후변화에 의한 재배지 이동을 고려하여 고위도 지역인 인제군을 포함한 4지역의 재배지를 선정하였으며, 생육특성을 비롯 기상 및 토양환경을 분석하여 토천궁의 생육특성과의 상관관계를 분석하였다. 4지역의 재배지 중 지상부와 지하부의 전체적인 생육은 평창지역에서 유의적으로 높게 확인되었다. 그리고 생육특성과 기상환경과의 상관관계에서 대기 및 토양온도가 지상부의 전체높이, 줄기직경, 지하부의 생육특성과 P < 0.01수준에서 유의적인 음의 상관관계, 잎의 길이 및 너비와는 양의 상관관계를 보였다. 또한 일사량이 높아질수록 잎의 크기를 제외한 생육특성이 양의 상관관계를 나타냈는데 이는 대기 및 온도의 상승으로 인한 잎의 증발산율 상승과 일사량에 따른 잎의 광합성량의 차이에 의한 결과라 사료된다. 또한 토양특성과의 상관관계에서 OM과 N, P, K는 지상부의 전체 높이와 줄기 직경을 비롯한 지하부의 생육특성과 음의 상관관계를 보였는데 근권의 토양시료를 사용하여 분석한 것이라 실질적으로 토천궁의 생육에 필요한 토양의 성분이 OM과 N, P, K이며, 토천궁에 의해 흡수되었다고 판단되는데 생육이 가장 우수했던 평창지역 토양 내 OM(1.69%)과 N(0.09%), P(897.72mg/kg), K(0.21cmol⁺/kg)의 수치가 타 지역 대비 상대적으로 낮게 측정된 결과가 본 실험에서 확인된 생육에 대한 OM, N, P, K의 함량과 부의 상관관계를 지지하며, 본 연구의 결과는 향후 토천궁의 재배지 선정 및 재배기술 정립에 활용할수 있을 것이라 사료된다.

• The Journal of the Convergence on Culture Technology
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• v.9 no.6
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• pp.355-363
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• 2023

The purpose of this study was attempted to confirm the relationship between medical workers' knowledge of the elderly, burn out, job satisfaction and awareness of elder abuse. The study was conducted on 371 doctors, nurses, and nurse's aides working at eight health centers, 15 nursing hospitals, and 30 university hospital institutions. Looking at the relationships between variables, this study found that knowledge of the elderly was a significant positive correlation with awareness of elder abuse(r=.14, p<.01), and burn out was a significant negetive correlation with job satisfaction(r=-.55, p<.01) and awareness of elder abuse(r=-.10, p<.05). Job satisfaction was a significant positive correlation with awareness of elder abuse(r=.13, p<.01). Awareness of elder abuse was a significant positive correlation with knowledge of the elderly(r=.14, p<.01) and was a significant negetive correlation with burn out(r=-.10, p<.05). As a result of this study, it is expected that Hospital workers can have a positive perception and attitude toward the elderly by reducing their burnout and improving their job satisfaction.

• The Journal of the Acoustical Society of Korea
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• v.28 no.6
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• pp.542-547
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• 2009

In this in vivo study, correlations of lumbar and femoral bone mineral densities (BMDs) with calcaneal speed of sound (SOS) were investigated in 36 osteoporotic women. Areal BMDs of the L2-L4 lumbar spine and the right femoral neck were measured by using dual energy X-ray absorptiometry (DEXA). SOS of the right calcaneus was measured by using ultrasound bone densitometry. Pearson's correlation coefficient (r) and level of significance (p) were used to evaluate the correlations between measurements. Lumbar BMD was highly correlated with femoral BMD (r=0.81). Lumbar and femoral BMDs exhibited similar comparable negative correlations with age (r=-0.52 and r=-0.55). A moderate negative correlation was found between calcaneal SOS and age (r=-0.45). Calcaneal SOS was significantly correlated with lumbar and femoral BMDs, with a higher correlation with femoral BMD rather than with lumbar BMD (r=0.54 and r=0.62). However, calcaneal SOS may not be an optimum index for the estimation of BMD of the most important fracture sites, such as the lumbar and the femur, because it showed lower correlations with lumbar and femoral BMDs compared to that with calcaneal BMD. Therefore, the development of a quantitative ultrasound technology for the direct measurement of acoustic properties at the lumbar and the femur is required to estimate BMD of these sites more accurately.

• Journal of Environmental Impact Assessment
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• v.28 no.6
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• pp.568-579
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• 2019

The present study aims to identify the effect of land cover categories on particulate matter (PM) concentrations by analyzing the correlation between monthly PM concentrations in Seoul's air quality monitoring network and the percentages of land cover categories by buffers around air quality monitoring stations. According to a monthly correlation analysis between land cover categories and PM concentrations, in the buffer 3km, PM₁₀ showed a better correlation than PM_2.5, there was a clear negative correlation with the forest area, the grassland and the urbanized area had some positive correlation with PM₁₀, and the barren land and the urbanized area had some positive correlation with PM_2.5. According to a monthly correlation analysis of dominant land cover sub-categories and sub-sub-categories within the buffer 3km, PM₁₀ showed a clear negative correlation with the broad-leaved forest, and some positive correlation with the road was dominant. PM_2.5 showed partly negative correlation with the broad-leaved forest and partly positive correlation with the commercial area. There was a very low or no correlation with other grassland and bare land subcategories. A monthly stepwise regression analysis on noticeable land cover sub-categories and sub-sub-categories with positive or negative correlations revealed that an increasing percentage of the broad-leaved forest had a clear effect on reducing PM₁₀ concentrations, and the road was excluded from the selected variables. Although an increasing percentage of the commercial area had some effect on increasing monthly PM_2.5 concentrations and an increasing percentage of the broad-leaved forest had an effect on decreasing the PM_2.5 concentrations, their effect size was smaller than that on PM₁₀. The forest area around the city center had the largest and clearest effect on reducing PM concentrations. The urbanized area's sub-categories and sub-sub-categories were also confirmed to have some effect on increasing PM concentrations.

• Journal of the Korean earth science society
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• v.43 no.1
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• pp.23-29
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• 2022

Although tropical cyclones with wind speeds weaker than 17 ms^-1 (weak tropical cyclones: WTCs) can cause significant damage, particularly over the Seoul metropolitan area, only a few studies have focused on WTC activity over South Korea. In this study, we found that WTC activity is likely associated with the Pacific Decadal Oscillation (PDO). During the negative phases of the PDO, landfall frequency of WTCs increased significantly compared to the positive phases at 95% confidence level. When related to the negative phases of the PDO, a positive relative vorticity anomaly is found in the northern sector of the western North Pacific while a negative relative vorticity anomaly and enhanced vertical wind shear prevail in the southern sector of the WNP. These factors are favorable for the northward shift of the genesis location of tropical cyclones on average, thereby reducing the total lifetime of WTCs. Moreover, a high-pressure anomaly over the Japanese islands would shift a tropical cyclone track westward in addition to the landfall location. Consequently, the effects of the topographical friction and the Yellow Sea Bottom Cold Water on a tropical cyclone may increase. These conditions could result in a weaker lifetime maximum intensity and landfall intensity, ultimately resulting in WTCs becoming more frequent over South Korea during the negative phases of the PDO.

• The Journal of Korean Academy of Sensory Integration
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• v.10 no.1
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• pp.11-20
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• 2012

Objective : The purpose of this study is intended to provide useful information about the disability evaluation indicators, the Modified Barthel Index (MBI) as a measurement tool for assessing the ability to perform activities of daily living through the correlation between the Modified Barthel Index (MBI) and the Manual Ability Classification System (MACS), and Gross Motor Function Classification System (GMFCS). Methods : The subject was 82 children with cerebral palsy. The validity was aexamined by calculation of correlation between the Modified Barthel Index (MBI), the Manual Ability Classification System (MACS) and Gross Motor Function Classification System (GMFCS). Results : There were a good significant correlation between the MBI and MACS (r = -.765, p <0.001), the MBI and the GMFCS (r = -.851, p < 0.001) and the MACS and the GMFCS (r = .615, p <0.001). Conclusion : The close correlation between the MBI that is used as the basis of grading cerebral palsy and high reliability and validity of the MACS, GMFCS suggest that disability evaluation indicators, the MBI could be useful for children with disabilities.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.4
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• pp.325-333
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• 2017

The purpose of this study was to examine the relationship between the Family Functioning, Smartphone Addiction and Self-differentiation of college students and investigate whether Self-differentiation mediated the relationship between Family Functioning and Smartphone Addiction. The subjects of this study were 176 college students from 3 colleges located in S-si and M-si and the data were collected over the period of 20 days from December 1 through December 20, 2016. As their Family Functioning increased, their Self-differentiation increased (${\beta}=667$, p<.001); as their Self-differentiation increased, their Smartphone Addiction decreased (${\beta}=-.361$, p<.001); moreover, their Self-differentiation fully mediated the relationship between their Family Functioning and Smartphone Addiction (Z=-2.336, p<.001). To alleviate the Smartphone Addiction of college students, their Family Functioning and Self-differentiation need to be improved.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2009.11a
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• pp.186-189
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• 2009

본 연구에서는 폭력영상 시청 시 개인의 공격성향에 따른 생체신호(ECG, GSR)의 변화를 분석하였다. 남자 23 명(21.4 세, ${\pm}1.8$ 세)의 피험자의 공격성을 설문지로 측정하였다. 실험은 Rest(15 분), 안정영상 시청(2 분 14 초), 폭력영상 시청(50 초), 안정영상 시청(2 분 14 초)으로 구성되어 있다. 폭력영상은 패싸움·마루타 실험장면을 보여주었으며, 안정영상은 바다·산·계곡 등의 영상을 보여주었다. 폭력영상 시청 시 개인의 공격성향과 ECG 신호 사이의 상관관계는 관찰 할 수 없었으나, GSR 신호와는 음의 상관관계를 관찰 할 수 있었다. 이 결과는 공격성이 높은 사람일수록 폭력영상 시청 시 생체신호 변화가 작을 수 있음을 시사한다.

• The Journal of the Acoustical Society of Korea
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• v.17 no.6
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• pp.67-73
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• 1998

쾌적한 음환경을 창조하기 위해서는 무엇보다도 음이 갖는 심리적 속성과 인지구조 를 파악하는 것이 중요하다. 이 연구는 여러 가지 환경음중에서 유쾌음에 대한 심리적 속성, 그리고 그 속성과 음과의 관계를 정성적으로 파악하는데 목적을 두고 있다. 특히, 음에 대한 감정 및 정서표현에 사회문화적 차이가 있다는 점을 감안하여 한국어 표현어를 심층적으로 조사·분석하고, 36종류의 표현어와 34종류의 유쾌음에 대해서 평정척도법을 이용한 심리평 가 실험을 실시하였다. 실험의 분석결과, 유쾌음의 심리적 속성은 활동성, 안정성, 박력성의 3가지 요인이 중요한 요인으로 밝혀졌다. 또한, 음과 표현어사이의 관계를 파악하기 위해 다 차원척도법을 이용한 선호도분석에 의해서 3가지 요인과 음과의 관계를 파악해 보았다. 이 결과는 유쾌음에 대한 평가시 중요한 심리적 속성으로서, 음의 물리적 평가방법 및 음환경 의 쾌적성 창조를 위한 중요한 실마리를 제공해 줄 수 있을 것이다.