• Ecology and Resilient Infrastructure
• /
• 제9권2호
• /
• pp.124-129
• /
• 2022

도시하천은 이치수의 기능과 함께 생태적으로 건강한 도시환경을 제공함으로써 시민의 삶에 핵심축이 되어오고 있다. 반면 도시 고밀화에 의한 기반시설 확장 등과 더불어 지역의 하천에 대한 보전과 이용 측면에서 상충이 발생하고 있다. 지속가능한 하천을 위해서는 적절한 합의와 조율이 필요한 실정이다. 본 연구는 주민참여 협치예산을 통한 주민 제안 공론화의 장에서 나타난 다양한 의견을 분석하고자 한다. 은평구의 6개 하천을 대상으로 이용자 인식 조사와 전문가 인터뷰를 실시하였다. 이를 통해 도시생활권 지방하천과 소하천의 안정적이고 지속가능한 보전과 적절하고 균형 있는 이용 방안을 제안하였다.

• 한국환경과학회지
• /
• 제33권8호
• /
• pp.553-568
• /
• 2024

The purpose of this study was to explore the use of the city biodiversity index (CBI) as a tool to improve biodiversity education for urban students. For use in educational purpose, the CBI was modified and supplemented to devise an Educational CBI, and its ability to facilitate the teaching of biodiversity topics was assessed. An Educational CBI that can be used at the high school level was successfully developed. Evaluation criteria were selected based on previous studies of the existing CBI and domestic circumstances, and the relationship between the index and biodiversity topics was revealed in detail. An examination of the relevance of the Educational CBI with the current biodiversity curriculum framework showed it to be highly relevant at the level of investigation and evaluation as a tool for measuring urban biodiversity. Furthermore, an examination of the relevance between the CBI for Education and the achievement standards of the general high school subjects of the 2022 revised curriculum indicated high relevance in environmental and science subjects. As an example, the city of Cheongju obtained 82-85 of 112 points in an evaluation using the Educational CBI, confirming the monitoring function of the index. Overall, the Educational CBI offers significant benefits as a tool for both biodiversity education and urban environmental education.

• 한국수자원학회논문집
• /
• 제38권9호
• /
• pp.737-746
• /
• 2005

최적화란 목적함수가 최대 또는 최소가 되도록 하는 결정변수를 찾아가는 절차이다. 기존의 많은 연구자들은 최적해의 효율적인 탐색과정에 집중한 반면 최적화의 시작점이라 할 수 있는 목적함수 구성을 위한 연구는 상대적으로 미진한 것이 사실이다. 따라서 본 연구에서는 국내외에서 빈번히 사용되고 있는 가중평균법을 사용하여 tradeoff를 고려한 목적함수와 절대우선순위를 위한 가중값을 적용한 목적함수를 구성하여 표본추계학적 동적계획법을 통해 산정한 최적운영률을 비교하였다. 그 결과 절대우선순위를 위한 가중값을 적용한 경우가 보다 실제 저수지운영과 부합하는 결과를 나타내는 것을 확인할 수 있었다. 따라서 국내 다목적댐 운영계획에 보다 적합한 목적함수를 구성하기 위해서는 절대우선순위를 위한 가중값을 부여하여 목적함수를 구성하는 것이 타당한 것으로 판단된다.

• 상하수도학회지
• /
• 제19권5호
• /
• pp.619-624
• /
• 2005

This work is for examining a simplified equation based on the rational formula, which can easily decide storm-water detention volume in small urban catchments. The storm-water detention volume is determined by the inflow hydrograph flowing to detention basin and the outflow hydrograph discharged from the detention basin. The ratio of average outflow over the period of rainfall duration against allowable discharge was 0.5 in former simplified equation. But this research has found that the average outflow ratio depends on the storage methodology. In the case of the on-line storage method, the average outflow ratio is a function of the time of concentration of the catchments and rainfall duration, which ranged from 0.5~1.0. In the case of the off-line storage method, the average ratio is a function of peak discharge and allowable discharge except above time of concentration and rainfall duration, where its function value ranged from 1.0~2.0. When applying this equation to small catchment in Mokpo city, South Korea, we could easily calculate the relation curve between the storm-water detention volume and allowable discharge.

• 여성건강간호학회지
• /
• 제10권4호
• /
• pp.342-350
• /
• 2004

Purpose: It has been suggested that approximately 40% of women between 40 and 64 years of age cease their sexual activity. The aim of this study was to establish the basic data for FSD(female sexual dysfunction) and FSD-related factors in regional urban and rural areas of Korea. Method: Three hundred twenty five women over 20 years of age and resident in regional urban and rural areas were analyzed by a visit survey with an organized questionnaire. The female sexual function index(FSFI) for measurement of sexual dysfunction was used. The significance between the degree of sexual dysfunction and characteristics of the participants was analyzed by a t-test and ANOVA test. The relationship between the degree of sexual dysfunction and related factors was analyzed by Pearson's correlation coefficient. Results: All analyzing tools including the FSFI had a high validity for measuring. The FSFI in Korean women was $19.97{\pm}4.87$ and ranged from 2 to 29. Old age, menopause, medication, no contraception usage and longer marital duration were significantly related with a lower FSFI score. Pearson's correlation coefficient revealed the significance in degrees of sexual distress (r=-.469, p=.000), sexual attitude(r=.305, p=.000) and a stressful life event(r= -.141, p=.038) with the sexual function index score. Conclusion: Women with sexual dysfunction should be evaluated for these sexual function-related factors in the history taking, and this data can be a basis for study for sexual dysfunction.

• 한국측량학회지
• /
• 제34권6호
• /
• pp.597-607
• /
• 2016

The goal of this study was to analyze landslide susceptibility using two different models and compare the results. For this purpose, a landslide inventory map was produced from a field survey, and the inventory was divided into two groups for training and validation, respectively. Sixteen landslide conditioning factors were considered. The relationships between landslide occurrence and landslide conditioning factors were analyzed using the FR (Frequency Ratio) and EBF (Evidential Belief Function) models. The LSI (Landslide Susceptibility Index) maps that were produced were validated using the ROC (Relative Operating Characteristics) curve and the SCAI (Seed Cell Area Index). The AUC (Area under the ROC Curve) values of the FR and EBF LSI maps were 80.6% and 79.5%, with prediction accuracies of 72.7% and 71.8%, respectively. Additionally, in the low and very low susceptibility zones, the FR LSI map had higher SCAI values compared to the EBF LSI map, as high as 0.47%p. These results indicate that both models were reasonably accurate, however that the FR LSI map had a slightly higher accuracy for landslide susceptibility mapping in the study area.

• 한국지구물리탐사학회:학술대회논문집
• /
• 한국지구물리탐사학회 2007년도 공동학술대회 논문집
• /
• pp.329-336
• /
• 2007

For scaling of the gradient of misfit function, we develop a new pseudo-Hessian matrix constructed by combining amplitude field and pseudo-Hessian matrix. Since pseudo- Hessian matrix neglects the calculation of the zero-lag auto-correlation of impulse responses in the approximate Hessian matrix, the pseudo-Hessian matrix has a limitation to scale the gradient of misfit function compared to the approximate Hessian matrix. To validate the new pseudo- Hessian matrix, we perform frequency-domain elastic full waveform inversion using this Hessian matrix. By synthetic experiments, we show that the new pseudo-Hessian matrix can give better convergence to the true model than the old one does. Furthermore, since the amplitude fields are intrinsically obtained in forward modeling procedure, we do not have to pay any extra cost to compute the new pseudo-Hessian. We think that the new pseudo-Hessian matrix can be used as an alternative of the approximate Hessian matrix of the Gauss-Newton method.

• 도시과학
• /
• 제11권2호
• /
• pp.9-17
• /
• 2022

The purpose of this study is to develop an index for evaluating the function of a new motorway using the travel distance frequency distribution (TLFD) calculated using the vehicle travel route big data, and to overcome the limitations of the evaluation through the existing traffic volume. The mobility evaluation index of motorways was developed by applying it to the TLFD data table in 2019. The smaller the value of the mobility evaluation index of the link is calculated, the more it is a link with mainly short-distance travel, and the higher the value of the mobility evaluation index, the more it means a link with mainly long-distance travel. The accessibility evaluation index was calculated through the result of the mobility evaluation index of all motorways developed, and all motorways were grouped into three groups using K-means clustering. Group A was found to exist inside a large city and consisted of motorways with many short-distance traffic, Group B was investigated as acting as an arterial between groups, and Group C was classified as a motorway consisting mainly of long-distance traffic connecting large cities and large cities. This study is significant in developing a new motorway function evaluation index that can overcome the limitations of motorway function evaluation through the existing traffic volume. It is expected that this study can be a reasonable comprehensive indicator in the operation and planning process of motorways.

• Journal of Information Processing Systems
• /
• 제19권2호
• /
• pp.219-231
• /
• 2023

Intelligent applications are crucial for increasing the popularity of shared urban electric bicycles (EBs). Building an application platform architectural system that can satisfy independent user operations is critical for increasing the intelligent usage of shared EBs. Consequently, we collected online reviews of shared EB applications, conducted semantic processing and sentiment analysis, and refined the positive and negative review data for each function. The positive and negative review indices of each function were calculated using the formulae for positive and negative review indices of product functions, thereby determining the functions that need to be improved. Each function of the Shared EB application was improved according to its business process. The main contributions of this study are to build a user requirement architecture system for the Shared EB application with five dimensions and 22 functions using the Delphi method to design the user interface (UI) of this application based on user satisfaction evaluation results; to create a high-fidelity dynamic interaction prototype and compare user satisfaction before and after improving the Shared EB application functions. The testing results indicate that the changes in the UI significantly improve the user experience satisfaction of the urban Shared EB application, with the positive experience index increasing by 69.21% and the negative experience index decreasing by 75.85% overall. This information can be directly used by relevant companies to improve the functions of the Shared EB application.

• 한국보건간호학회지
• /
• 제3권2호
• /
• pp.143-156
• /
• 1989

This study was done in order to analyze the factors which influenced the performance level of urban family planning health personnels' task. Interview survey was done during the period May, 1989. Interviewee were 130 family planning health personnels among total of 140 family planning health personnels in Seoul metropolitan city area. The internal consistency reliability was tested by Cronbach’s Alpha and the construct validity of the survey tool was tested by Factor analysis. Multiple stepwise regression analysis was used to identify major factors influenced to perform family planning health personnels' task. The results of this study were summarized as follows: 1. The internal consistency reliability was high and very significant (Cronbach's Alphs=0.8445, p<0.0000). 2. The construct validity was high and very significant. This analysis was contained 5 factors; registering and keeping of eligible woman records, health educating for FP & MCH, referral for vasectomy and tubal ligation and loop, supplying contraceptive appliances, sending moved-out eligible woman records. 3. Among a total of 15 contents of their functions recording of daily report and monthly report (76.2%), classifying and keeping of records(66.2%), registering of eligible woman records(60.85ti), distribution of leaflets and pamplets(54.6%), counselling & supervision about family planning(53.8%) were actively performed. Sending moved-out eligible woman records(60.8%), health education for community people(49.2%), referring contraceptors' side-effects were poorly performed. 4. The factors which influenced the performance level of urban family planning health personnels' function were age, marital status, educational level, certification, number of residents, number of eligible women, job car-eer, work responsibility, job satisfaction knowledge, position, cooperation of community people, cooperation of Dong Office, cooperation of Health Center. These 14 variables were able to explain job function from 21.4% of follow-up care of contraceptor to 9.1% of classifying & keeping of eligible woman records.