• 대한교통학회지
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• 제27권2호
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• pp.35-46
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• 2009

본 논문에서는 주민 쾌적성, 보행자 안전성, 그리고 택지개발의 효율성을 제고시킬 수 있는 보행자 도로 공급 수준 평가지표를 제시한다. 이를 위한 연구에서 다각적인 분석이 시행되었는데, 첫째, 이미 입주가 끝난 8개 택지개발 사업지에서 보행수요에 미치는 영향요소를 찾았고, 영향 요소 간 관계를 정립하기 위해 Space Syntax 분석을 통한 국부통합도, 활동인구(인/일), 택지개발지구 면적 등을 선택하여 보행수요 예측모형을 정립하였다. 그 후 기존 연구에서 제시한 보행점유공간과 본 연구에서 개발한 보행수요 예측모형을 상호 비교하여 최초 계획단계에서 보행자 도로 공급수준을 산정할 수 있도록 했다. 끝으로, 본 연구에서 정립한 평가지표가 합리적인 공급수준을 평가하는 지표인지 확인하기 위해 주민 만족도 설문조사를 실시했는데, 그 결과 본 연구에서 정립한 평가지표는 기존 지표보다 우수한 것으로 나타났다. 앞으로 본 연구 결과는 택지개발 사업지에서 보행공간을 계획할 때 많은 도움을 제공할 것이다.

• 한국응용과학기술학회지
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• 제35권3호
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• pp.956-962
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• 2018

Childhood obesity causes a higher risk of obesity, premature death and disability in adulthood. In addition, obese children experience an increased risk of respiratory problems, hypertension, cardiovascular disease, insulin resistance and psychological effects. This study aimed to investigate how an exercise intervention affects health-related physical fitness and inflammatory-related blood factors in obese children after. We hypothesized that there would be positive effects on serum levels of insulin-like growth factor-1 (IGF-1), connecting peptide(C-peptide) and resistin, as well as in muscle and cardiovascular-related physical capacities, after an exercise intervention in obese children. Thirty-seven obese children haveperformed health-related fitness tests and provided blood samples for the analysis of changes in circulating biomarkers, both before and after an 8-week exercise intervention, which includes stretching, aerobic exercise, resistance exercise and sports games. The results indicate that exercise training beneficially affects body compositions, especially percentage body fat and muscle mass, without influencing to body weight and height. The results of the physical fitness tests show that muscle and cardiovascular capacity were increased in obese children in response to exercise training. Simultaneously, the exercise training decreased circulating levels of C-peptide, which equated to a "large" effect size. Although there were no significant effects on the levels of IGF-1 and resistin, they show a "small" effect size. Therefore, our findings suggest that the exercise intervention have beneficial effects on body composition and physical fitness levels in obese children, whichmight be associated with the decline in circulating C-peptide.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2002년도 Proceedings of the International Welding/Joining Conference-Korea
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• pp.235-243
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• 2002

Ni-base superalloys are used extensively in industry, both in aeroengines and land based turbines. About 60% by weight of most modern gas turbine engine structural components are made of Ni-base superalloys. To satisfy practical demands, the efficiency of gas turbine engines has been steadily and systematically increased by design modifications to handle higher turbine inlet or firing temperatures. However, the increase in operating temperatures has lead to a decrease in the life of components and increase in costs of replacement. Moreover, around 80% of the large frame size industrial/utility gas turbines operating in the world today were installed in the mid-sixties to early seventies and are now 25 to 30 years old. Consequently, there are greater opportunities now to repair and refurbish the older models. Basically, there are two major factors influencing the weldability of the cast alloys: strain-age cracking and liquation cracking. Susceptibility to strain-age cracking is due to the total Ti plus AI content of the alloy; Liquation cracking is due either to the presence of low melting constituents or constitutional liquation of constituents. Though Rene 41 superalloy has 4.5wt.% total Ti and Al content and falls just below the safe limit proposed by Prager et al., controlled grain size and special heat treatments are needed to obtain crack-free welds. Varying heat treatments and filler materials were used in a laboratory study, then the actual welding of service parts was carried out to verity the possibility of crack-tree weld of components fabricated from Rene 41 superalloy. The microstructural observations indicated that there were two kinds of carbides in the FCC matrix. MC carbides were located along the grain boundaries, while M$_{23}$C$_{6}$ carbide was located both inter and intra granularly. Two kinds of filler materials, Rene 41 and Hastelloy X were used to gas tungsten arc weld a patch into the sheet metal, along with varying pre-weld heat treatments. The microstructure, hardness and tensile tests were determined. The service distressed parts were categorized into three classes: with large cracks, with medium cracks and with small or no visible cracks. No significant difference in microstructure among the specimens was observed. Specimens were cut from the corner and the straight edge of the patch repair, away from the corner. The only cracks present were found to be associated with inadequate surface preparation to remove oxidation. Guidelines for oxide removal and the welding procedures developed in the research enabled crack-free welds to be produced.d.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제22권2호
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• pp.112-119
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• 2011

Objectives : Obesity has been linked to various psychological problems as well as medical complications, especially among adolescents. Previous studies have suggested an association between body weight and depression or self-esteem ; however, there has been little evidence on self-perception of weight and mental health. The aim of this study was to examine the association of perceptional weight status with mental health in Korean adolescents. Methods : This study was based on data obtained from the third Korean National Health and Nutritional Examination Survey (2005). The study sample consisted of 583 adolescents (268 boys, 315 girls) aged 12-18 years, who had completed the health survey, the health examination, and the nutritional survey. Participants were divided into two groups based on the actual or perceptional weight status: non-obese and obese. Questionnaires for stress, depressive mood, and suicidal thoughts were utilized as mental health indicators. Results : The agreement between actual and perceptional weight status was moderate (k value, 0.585 ; p<0.01). The influencing factors for the discrepancy between actual and perceptional weight status were body mass index of subjects and their parents' education. The obese group was likely to have higher stress levels and more experience of depressive mood or suicidal ideation in regard to both actual and perceptional weight status. A multiple logistic regression analysis revealed that girls who had perceived themselves as obese were more likely to have an experience of depressive mood than other girls (unadjusted OR, 4.98 ; adjusted OR, 5.15). Conclusion : An experience of depressive mood was significantly associated with the perception of weight status and not actual weight status in Korean female adolescents.

• 가족자원경영과 정책
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• 제13권3호
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• pp.181-205
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• 2009

The purpose of this study is to investigate some Influencing factors related to the wealth perception and property increase of 519 women in Seoul. The research was conducted from the end of February 15 to the beginning of January 20, 2009. The figures obtained were analyzed by frequency, percentage, mean, x-test, t-test, F-test, chi-square, and Duncan's F-test with SPSS pc+ The major findings of who study are summarized as follows: l.There were significant differences between the wealth recognition (economic plan affirmative and negative perception of wealth) for women according to social and psychological variables; economic plans have a higher value for married women, older women, those who have followed a postgraduate university course, those with higher income and expenditure, higher life satisfaction, and high and middle satisfaction with their economic life. In particular, economic plans varied significantly according to expectation of wealth in old age, and future economic prospects in the middle group. 2. Increased wealth and economic according to social and psychological variables (marital status, age, education, income, expenditure, life satisfaction, satisfaction with economic life, expectation of wealth in old age, future economic prospects) were shown to be associated with the following methods of increasing property: use of savings banks (p<.001) showed a rate of deposit of 20%-40% (p<.001) saving and thrift was a practice (p<001) that was related to the cost of living; and education expenditure (p<.001) as a property preparation period was exhibited in women aged 25-30 (p<.001). 3. There were significant differences in the recognition of wealth according to strategies for increasing wealth. There were no significant differences between mean of property acquisition and point of expenditure or the property preparation period in the perception of wealth. The related variables in rate of deposits were under 20% according to economic plan and negative wealth perception. In contrast, in the middle and high group, the economic plan and negative wealth perception were 20%-40% in relation to the rate of deposits. Variables related to the action of saving and thrift and property acquisition were practiced in the low and middle group of affirmative wealth recognition and the high group of negative wealth perception. The high group for wealthrecognition and the low group for wealthnegation exhibited little savings, thrift, and property accumulation. Those variables which point an expenditure the cost of living were education expenditure in all groups of negative wealth perception. The women in the study practiced more soundness economic planning according to their increased wealth and economic strategy. This study suggests that women should have positive wealth perception in their lives.

• 대한토목학회논문집
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• 제34권3호
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• pp.1023-1031
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• 2014

본 연구는 2012년 3월부터 서울시가 시행하고 있는 장기안심주택 제도에 대한 거주의사 평가를 분석하여 장기안심주택 공급의 실효성과 운영에 대한 시사점을 제시하고자 한다. 이를 위해 실제 장기안심주택 거주자의 거주특성에 대한 거주의사 모형과 거주영향요소 선택요인과 관련된 장기안심주택 거주의사 모형을 정립하였으며 이를 통해 향후 장기안심주택의 공급을 공급하는데 있어 고려해야 될 요소를 찾아내는 것을 연구의 목적으로 설정하였다. 이 연구를 통해 지원자의 재정 상태, 소득수준, 공공지원 측면이 지원자가 장기안심주택을 선택할 때 가장 큰 영향을 준다는 사실을 확인할 수 있었으며 또한 현재 차가인 가구와 주변 주택가격시세보다 비싼 가격에 입주하는 가구들의 잠재적 거주의사가 높았음을 알 수 있었다. 이를 통해 기존의 임대주택에서 가장 큰 문제점으로 지적되어 왔던 외부에서 보는 임대주택의 가시적 식별성과 한정된 지역에 집중되는 임대주택 분포밀도에 의해 파생되는 각종 문제점들을 장기안심주택이 어느 정도 해결하는데 도움을 줄 수 있을 것이라는 예측이 가능했다. 또한 기존의 연구결과들과는 다르게 실제 임대주택이나 장기안심주택에 거주하고자 하는 사람들의 경우 주택규모가 기존 보다 큰 중대형 임대주택을 특별히 선호하지는 않는 것으로 나타났다.

• 대한소아치과학회지
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• 제41권3호
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• pp.247-256
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• 2014

이 연구의 목적은 대전지역 미취학 어린이의 비수유성 빨기 습관의 유병률을 조사하고 이 유병률에 영향을 미치는 기여요인과의 관련성을 평가하며 비수유성 빨기 습관이 유치열의 교합에 어떤 영향을 주는지 알아보고자 하는 것이다. 구강검진을 위해 개인치과에 내원한 만 18개월에서 65개월 사이의 어린이 841명을 검사하고 그 보호자를 대상으로 설문조사를 시행하였다. 전체 설문에 대답한 어린이 중 32.8%에서 비수유성 빨기 습관이 있었으며 여아에서 37.7%로 남아보다 유의하게 더 높았다. 모유 수유의 기간이 길어짐에 따라 비수유성 빨기 습관 유병률은 유의한 감소를 보였으며 출생순서와 엄마의 직업유무는 관련성이 없었다. 손가락빨기가 전체 비수유성 빨기 습관 어린이 중 62.6%로 인공젖꼭지빨기(37.4%)에 비해 더 우세하였고 습관의 지속기간 또한 유의하게 길었다. 비수유성 빨기 습관의 지속기간이 길어질수록 유치열 교합이상이 더 많이 관찰되었다.

• 대한기관식도과학회지
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• 제7권1호
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• pp.29-33
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• 2001

Background and Objectives： Adenoid cystic carcinoma (ACC) is an aggressive, often indolent tumor, with a high incidence of distant metastasis (DM). Relatively little has been written about the factor that influence distant spread and subsequent survival because it is uncommon and has protracted clinical course. We attempted to reemphasize the biologic behavior of ACC by investigating the relationship between the clinical features and prognosis. Materials and Methods : We have retrospectively studied 24 determinate patiens who received definitive treatment in our hospital between 1984 and 1995 for ACC in all salivary sites. Inclusion criteria were no prior treatment elsewhere other than excisional biopsy and eligibility for follow-up of at least 5 years. Variables assessed for their impact on distant metastasis included age, gender, size, node status, stage, histologic pattern, locoregional treatment failure. Results : Treatment failure occurred in a total of 16 of 24 determinate Patients (64%), 12 of whom had DM (50%). This was usually associated with locoregional recurrence (8 patients), but DM was the only indication of failure in 4 whose primary tumor was controlled. Of the 12 patients with known DM, the lung was recored as the only involved site in 7 Patients, lung was involved in addition to other sites in 1, bone and liver metastasis occurred in 2 respectively. Disease-free intervals varied from 3 month to 14 years (median 3 years). The only significant factors influencing survival were the size of the primary tumor, locoregional recurrence. Conclusion : The high incidence of DM with locoregional failure confirms the importance of aggressive initial surgery. combined with irradiation, for high-stage tumors or involved surgical margins. Large tumor size and locoregional recurrence, rather than microscopic appearance, were predictive of DM.

• 한국융합학회논문지
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• 제8권6호
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• pp.85-96
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• 2017

본 연구목적은 수술실 간호사의 언어폭력경험, 언어폭력충격 및 소진정도를 파악하고 그 상관관계를 분석하기 위함이다. 수술실 간호사 202명을 대상으로 구조화된 설문지를 이용하여 자료수집하였으며 분석은 기술통계, t-test, ANOVA, Scheffe test, Pearson상관계수 및 다중회귀분석으로 하였다. 연구결과에서 수술실 간호사들의 언어폭력경험수준은 평균 1.96점, 언어폭력충격수준은 평균 1.67점, 소진정도는 평균 3.08점으로 나타났다. 언어폭력경험수준은 언어폭력충격수준 및 소진정도와 유의한 정적 상관관계가 있었으며(r=.39, p<.001; r=.41, p<.001) 언어폭력충격수준도 소진정도와 유의한 정적 상관관계를 나타내었다(r=.29, p<.001). 소진정도에 영향을 미치는 요인은 언어폭력경험, 언어폭력충격수준 및 직위(일반간호사)였으며 이들 요인은 수술실 간호사의 소진정도를 30% 설명하였다(F=9.15, p<.001). 이상의 결과를 통해 수술실 간호사의 언어폭력경험은 개인적, 사회적 측면에서 안정감과 생산성을 위협하며, 의료현장에서의 언어폭력예방을 위한 중재방안의 모색이 필요함을 확인하였다.

• 멤브레인
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• 제25권5호
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• pp.373-384
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• 2015

지난 수십 년 동안, 고분자막은 기체 분리 분야에서 큰 역할을 해왔다. 온실가스의 주범인 이산화탄소를 분리하기 위해서는 더 높은 투과선택도와 장수명 및 대면적 등을 요구한다. 하지만 기존 고분자 분리막들은 투과도와 선택도의 역상관 관계 특징을 지니고 있으며, 무기물질은 투과성능이 우수하지만 가격이 비싸다는 단점이 있다. 최근 많은 연구가 진행되어온 혼합 매질 분리막은 고분자와 무기물질의 이점들을 혼합하여 기체 분리막의 차세대로서 큰 이목을 이끌고 있다. 혼합 매질 분리막은 대칭적인 구조 또는 비대칭적인 구조를 가지고 있으며, 투과량을 증가시키기 위해서는 비대칭적인 구조가 바람직하다. 혼합 매질 분리막에서 가장 중요한 변수로는 무기입자의 균일한 분산과 무기물과 고분자 사이의 좋은 계면을 형성하는 것이다. 최근에 새로운 분류의 다공성 결정성 물질인 금속 유기 구조체(MOF)는 이산화탄소 분리용 소재로써 많은 관심을 끌고 있다. MOF의 한 종류 중, zeolitic imidazolate frameworks (ZIF)는 가장 흔하게 사용되는 무기입자이며 이는 입자의 크기를 작게 만들 수 있으며, $CO_2$를 분리하기에 적절한 기공의 크기를 가지고 있기 때문이다. 이 밖에 혼합 매질 분리막에 사용되는 특정 물질들을 적용하기 위해서는 선택도와 크기, 호환성, 안정성 등을 동시에 최적화시켜야 한다. 이와 같이 본 총설에서는, 혼합 매질 분리막에 관련된 주요 연구내용과 이러한 연구를 수행하는 대표적인 전략들을 소개하였다.