• 한국도로학회논문집
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• 제16권3호
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• pp.85-99
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• 2014

PURPOSES : This study has been performed with the objective to determine threshold zone luminance of adaptation luminance by target safety level in a vehicular traffic tunnel with design speed set at 100km/h. METHODS : The study made a miniature capable of portraying changes in luminance distribution within $2{\times}10^{\circ}$ conical field of view of the driver approaching to the tunnel for the test. Test conditions were set based on justifications for CIE 88-1990's threshold zone luminance used as a reference by domestic tunnel light standards (KS C 3703 : 2010). Luminance contrast of object background and object is 23%, object presentation duration is 0.5 seconds, and size of the object background is $7.3{\times}11.5m^2$ RESULTS : Threshold zone luminance was set within adaptation luminance of $100{\sim}3,000cd/m^2$. Adaptation luminance and threshold zone luminance based on 50%, 75% and 90% target safety level all showed a relatively high linear relationship. According to findings in the study, it is not appropriate to specify the relationship between adaptation luminance and threshold zone luminance as luminance ratio. Rather, direct utilization of the linear relationship gained from the study findings appears to be the better solution. CONCLUSIONS : Findings of this study may be used to determine operation of threshold zone luminance based on target safety level. However, a proper verification and validity of test results are required. Furthermore, a study to determine proper threshold zone luminance level considering target safety level reviewed in this study and various decision-making factors such as economic conditions in Korea and energy-related policies should be carried out in addition. Additional tests on adaptation luminance greater than $3,000cd/m^2$ will be performed, through which application scope of the test findings will be broadened.

• 성인간호학회지
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• 제27권3호
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• pp.273-282
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• 2015

Purpose: The objective of this study was to identify the predictors of self-care behaviors among elderly patients with hypertension using quantile regression method. Methods: A total of 253 elderly patients diagnosed with hypertension was recruited via 3 different medical clinics for the study. The quantile regression and a liner regression was conducted using Stata 12.0 program by analyzing predictors of self-care behaviors. Results: In the ordinary least square, self-efficacy, period of disease, and education level explained 42% of the variance in self-care activities. In the quantile regression, affecting predictors of self-care behaviors were self-efficacy for all quantiles, the period of disease for from 60% quantile to 90% quantile, education level for 20%, 30%, and 50% quantiles, economic status for 10%, 50%, and 60% quantiles, age for 10%, 70% quantiles, fatigue for 10% quantile, knowledge about hypertension for 10% and 20% quantiles, and depression for 30% and 40% quantiles. Conclusion: The affecting predictors of self-care behaviors among elderly with hypertension were different from the level of self-care behaviors. These results indicated the significance in assessing predictors according to the level of self-care behaviors when clinical nurses examine the patients' health behaviors and plan any intervention strategies. Specially, education level and knowledge about hypertension were the significant predictors of self-care activities for low quantiles. Clinical nurses may promote self-care activities of the given population though health education programs.

• 보건교육건강증진학회지
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• 제23권4호
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• pp.67-87
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• 2006

Objective: In order to provide basic data required to evaluate the knowledge and behavior of old people towards health promotion and primary factors that influence them, to develop a health educational program. Method: A survey was conducted from March 6th 2004 to June 10th 2004. A total of 949 senior citizens over 60 participated in the survey. Results: The old people was the lower the educational level they had, the lower the level of health education experience they had and the lower the frequency of regular health check-ups they had. In regards to health education and health promotion, seniors citizens were neglected because of a lack of health awareness and knowledge, wrong habits related to healthy living, low access to medical examination, poor economic state, and low educational level. In addition to social atmosphere and systematic efforts by the government, senior citizens tried to find their own ways to have healthy living by improving their educational level, health awareness, and level of health knowledge, and lifestyle. Conclusion: Therefore, not only their family members, but local communities, public organizations, and the whole nation should make every effort to provide a effective health education system by using health educators for senior citizens. There is also a need to prepare a practical and systematic health education program for senior citizens so that they can enjoy comfortable and healthy living in their old age.

• Journal of Korean Neurosurgical Society
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• 제60권1호
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• pp.30-39
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• 2017

Objective : To compare the clinical outcomes and biomechanical effects of total disc replacement (TDR) and posterior cervical foraminotomy (PCF) and to propose relative inclusion criteria. Methods : Thirty-five patients who underwent surgery between 2006 and 2008 were included. All patients had single-level disease and only radiculopathy. The overall sagittal balance and angle and height of a functional segmental unit (FSU; upper and lower vertebral body of the operative lesion) were assessed by preoperative and follow-up radiographs. C2-7 range of motion (ROM), FSU, and the adjacent segment were also checked. Results : The clinical outcome of TDR (group A) was tended to be superior to that of PCF (group B) without statistical significance. In the group A, preoperative and postoperative upper adjacent segment level motion values were $8.6{\pm}2.3$ and $8.4{\pm}2.0$, and lower level motion values were $8.4{\pm}2.2$ and $8.3{\pm}1.9$. Preoperative and postoperative FSU heights were $37.0{\pm}2.1$ and $37.1{\pm}1.8$. In the group B, upper level adjacent segment motion values were $8.1{\pm}2.6$ and $8.2{\pm}2.8$, and lower level motion values were $6.5{\pm}3.3$ and $6.3{\pm}3.1$. FSU heights were $37.1{\pm}2.0$ and $36.2{\pm}1.8$. The postoperative FSU motion and height changes were significant (p<0.05). The patient's satisfaction rates for surgery were 88.2% in group A and 88.8% in group B. Conclusion : TDR and PCF have favorable outcomes in patients with unilateral soft disc herniation. However, patients have different biomechanical backgrounds, so the patient's biomechanical characteristics and economic status should be understood and treated using the optimal procedure.

• Asian Pacific Journal of Cancer Prevention
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• 제15권20호
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• pp.8877-8881
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• 2014

Background: Despite social gradients in adult smoking, the effects of socioeconomic position (SEP) on adolescent smoking is not well understood. This study examined effects of subjective SEP as well as the objective SEP on smoking among Korean adolescents. Materials and Methods: Data were obtained from the 2012 Korea Youth Risk Behavior Web-based Survey, a nationally representative sample of middle and high school students (38,221 boys; 35,965 girls). SEP was assessed by the Family Affluence Scale (FAS) and the self-rated household economic status. Relationships between SEP and smoking were analyzed by multivariate logistic regression. Results: The low perceived SEP for either the high or low FAS grade was related to an elevated likelihood of smoking in both genders. A significantly higher risk of smoking was found in boys of low perceived SEP in middle school (odds ratio [OR] 1.50; 95% confidence interval [CI] 1.28-1.77 for high FAS, OR 1.55; 95% CI 1.21-1.98 for low FAS), and of low perceived SEP and high FAS in high school (OR 1.13; 95% CI 1.02-1.26). Among girls, an elevated risk of smoking was observed in middle school group with low perceived SEP and low FAS (OR 2.01; 95% CI 1.44-2.79) and in the high school group of low perceived SEP, regardless of FAS level (OR 1.34; 95% CI 1.14-1.57 for high FAS, OR 1.31; 95% CI 1.04-1.65 for low FAS). Conclusions: The relationship of subjectively perceived SEP with smoking is as important as objective SEP and more significant in Korean high school adolescents.

• 벤처창업연구
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• 제17권1호
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• pp.213-227
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• 2022

사회적 가치 창출과 경제적 지속가능성을 동시에 추구하는 사회적 기업가정신에 관한 연구가 최근 국내외에서 빠른 속도로 증가했다. 연구자들은 사회적 기업의 성과 향상에 사회적 기업가정신이 주요한 요인이라는 점에 주목해 다수의 실증연구를 수행하였다. 하지만 대부분의 연구에서 사회적 기업의 성과를 기업가의 주관적 인식에 기초하여 측정하고 있어 동일방법편의의 한계를 내포하고 있다. 또한 사회적 기업가정신이라는 기업가의 개인적 특성이 사회적 및 경제적 성과라는 특수한 이중적 목표 달성에 영향을 미치는 구체적인 과정을 설명할 수 있는 실증적 증거도 부족하다. 이에 본 연구는 변수 간의 실증 규명을 위한 성과 측정의 객관성을 높이고, 사회적·경제적 성과를 단일한 것으로 보는 특성인 혼합가치 지향성을 포함하여 사회적 기업가정신이 성과에 미치는 영향을 재검증한다. 연구의 목적은 사회적 기업가정신과 혼합가치 지향성이 사회적 기업의 사회적 및 경제적 성과에 미치는 영향을 검증하는 것이다. SK의 사회성과인센티브(SPC)에 참여한 국내 사회적 기업의 인식조사와 객관적인 성과 자료를 활용하여 회귀분석을 수행한 결과, 사회적 기업가정신의 하위 요인인 위험감수성이 경제적 성과와 사회적 성과에 대해 유의한 수준에서 긍정적 영향을 미쳤다. 또한 사회적 기업가정신은 혼합가치 지향성을 향상시키며, 혼합가치 지향성은 사회적 성과에 영향을 미치는 것을 확인하였다. 따라서 본 연구는 사회적 기업가정신과 혼합가치 지향성이 성과에 차별적인 영향을 미치고 있음을 규명하였으며, 선행 연구에서의 주관성 측정과 동일방법편의의 극복을 시도하였다는 데 그 의의가 있다.

• 국제초고층학회논문집
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• 제6권2호
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• pp.149-163
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• 2017

With the intensification of urban development in Chinese cities, mixed land use in urban centers extends vertically into 3-D and expands its scale from a single building to commercial clusters. The multi-level pedestrian system in city centers also changed its role from one of traffic isolation to spatial integration, where transit nodes, street sidewalks, squares, building entrances, atriums, and corridors are interconnected, both horizontally and vertically, into a whole spatial system, within which pedestrian flows are guided and shopping facilities are arranged. This paper uses spatial configuration analysis of space syntax to examine the impacts of spatial patterns on movement distribution and the business performance of tenant mix in the multi-level commercial system of the Nanshan Commercial Cultural District in Shenzhen, China. The key objective is to better understand the interactions between the socio-economic variables and spatial design parameters of a shopping complex. The research findings point to the importance of multiplicity between syntactic variables and other spatial variables in influencing the pedestrian flows, business performance and tenant mix in highly complex commercial systems. Particularly noteworthy is the relationship between spatial accessibility measures and the location of escalators, and the ways in which individual commercial buildings are embedded into the overall spatial system. The study suggests that this may lead to the preliminary identification of the spatial qualities of effective vertical extensions of mixed land use in a high-density urban settings.

• 한국산업보건학회지
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• 제29권1호
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• pp.57-68
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• 2019

Objective: The purpose of this study is to propose the benefits of reduction measures according to the occupational radon reference level in order to present basic data for radon management guidelines considering domestic circumstances. Methods: This study uses radon data measured in the subway stations from 2015 to 2016. Of the total of 4,643 cases, 4,231 cases were analyzed excluding the 412 cases where the values were below $300Bq/m^3$. Results: Cost-Benefit analysis was done on the results of the field survey on subway work sites. At the exposure level of $400Bq/m^3$, the ratio between the cost and the benefit was highest at 1 : 1.81(the cost was KRW 1,398,568,032, while the benefit KRW 2,5248,772,841). At the exposure level of $600Bq/m^3$, the ratio of cost and benefit was 1: 1.80, at $300Bq/m^3$ it was 1.72, at $800Bq/m^3$ it was 1.71, at $200Bq/m^3$ it was 1.54, and at $100Bq/m^3$ it was 1.40. Conclusions: Radon management in the workplace provides economic benefits and appropriate reduction strategies are needed. In addition, it is necessary to establish and distribute radon exposure assessment procedures and guidelines for the safety and health of employees when exceeding the exposure standard, and guidelines for radon management in the workplace should be established.

• Animal Bioscience
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• 제37권4호
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• pp.668-677
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• 2024

Objective: The current experiment was performed to investigate the influence of different dietary levels of Moringa oleifera leaf meal (MOLM) on productive performance, nutrient digestibility, blood parameters, immune response, caecal microbiota, and carcass characteristics of Muscovy ducks (Cairina moschata) during 7 to 63 d of age. Methods: A total of 240 unsexed 7-d-old ducklings were distributed into five (treatment) groups; each one contained six replicates with eight ducklings each. Birds of the first group were fed basal diet without MOLM and served as control, while the other four groups were fed basal diet with 0.25%, 0.50%, 1.0%, and 2.0% MOLM inclusion level, respectively. Results: The obtained results revealed that including MOLM in the diets significantly improved body weight, body weight gain, feed conversion ratio and economic efficiency compared with the control group. Among the different MOLM inclusion treatments, increasing MOLM inclusion level decreased (p<0.05) such previous parameters. Decreasing MOLM inclusion levels in duckling diets increased (p>0.05) the digestibility of organic matter, crude protein, ether extract, and nitrogen free extract, however all MOLM treatments were significantly higher than the control group. Results also revealed that feeding ducks lower MOLM inclusion levels (0.25% or 0.50%) improved blood parameters (p<0.05) compared with the higher inclusion levels (1.0% or 2.0% MOLM) and the control group. Ducks fed different MOLM levels had significantly higher phagocyte index and activity, immunoglobulin G (IgG), IgM, total antioxidant capacity, glutathione peroxidase activity, and superoxide dismutase activity compared with control group. Conclusion: Despite the beneficial effects of all MOLM treatments on growth performance, nutrient digestibility, physiological status, and immune response of duckling, the increasing MOLM inclusion level in the diet had deleterious effects on such studied traits, consequently 0.25% was the best MOLM inclusion level in duckling diets.

• 대한예방한의학회지
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• 제4권2호
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• pp.273-284
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• 2000

The objective of this study consists on clarifying what factors are influenced upon skin care behavior using fender's Health Promotion Model, widely used to anticipate practices of health care behavior for women with keen interest in skin care and then manifesting their correlations from July 1 to August 22, 1998, on 159 women interested in skin care. A subvariable included practice of skin care behavior and independent variables include general characteristics, health fitness, the level of agreement with the advantages of the perceived skin care behavior, the level of cognition of the necessity for skin care behavior The data collected processed with ANOVA and multiple regression analysis to clarify what factors among other independent variables have the most powerful effects upon skin care. The resultant findings were revealed, as follows : 1. In health care behavior among skin care behavior,'full ingestion of water' represented the highest value by 3.45 points, 2. The testees of this study had for the most part a higher level of cognition for the necessity for skin care behavior than for practice of skin care behavior. The more points they have for cognition of the necessity for skin care behavior, the more points they present for practice of skin care behavior. 3. From the perspective of the relationship between sociometic factors on the testees and their skin care behavior, the higher level married women were on (p<0.05) and the more points they have for economic status, the higher points were reflected . 4. The correlations between the testees' recognition or perception factors and points for practice of skin health state showed the higher points than the group who thought that they did not know their own skin health state (p<0.05). The higher the points of skin care fitness (p<0.0001), the higher the points of self-awareness (p<0.0001) 5. The factors that had the most powerful influence upon cognition and practice of women's skin care behavior were found, with statistical significance, to be adjustable factors such as age, smoking, drinking habit, economic status, etc. and points of cognition of the necessity for skin care behavior.