• 한국도시환경학회지
• /
• 제18권4호
• /
• pp.531-546
• /
• 2018

동아시아지역을 대상으로 황사배출량 산정 모듈 및 이를 적용한 예보시스템을 개발하였고, 개발된 모형의 화학수송모델링 정합도 및 실시간 예보 운영 평가를 진행하였다. 2015년 화학수송모델링 정합도 평가 결과, 중국 지역에서는 황사 배출량을 적용한 예보 모형이 과대평가하는 기간이 있으나 대부분 지역에서 저평가 되었던 $PM_{10}$ 을 보완하고, 통계수치가 개선되는 것을 확인할 수 있었다. 한국 지역에서는 황사 발생일인 2월 22일~24일, 3월 16일~17일(서울지역대상)에는 황사의 유입을 적절히 모사하였으나 황사가 관측되지 않은 4월에는 황사를 적용한 예보모델이 과대평가하는 것을 확인할 수 있었다. 그러나 황사를 적용한 예보모형은 한반도 대부분 지역에서 저평가 되었던 $PM_{10}$ 을 보완하고, 통계수치가 개선되는 것을 확인할 수 있었다. 2017년 예보 성능 평가 결과, 황사배출량을 적용한 예보모델은 기존 모델과 비교하였을 때, POD는 대부분 개선되지만, A는 유사 또는 감소, FAR는 대부분 증가하는 경향이 나타났다. 황사배출량을 적용한 예보모형은 동아시아 지역에 저평가 하고 있는 $PM_{10}$ 을 보완하는 장점이 있지만, 황사배출량 산정의 불확실성 등이 내제되어 모델이 측정값을 과대모의하여 오경보율이 높다. 따라서 한반도 지역에 대표 대기질 예보모형으로 사용하기는 부적절하다고 판단된다. 그러나 황사 기간에는 황사배출량 모델의 모사성능은 우수하였으므로, 황사가 발생하는 기간에는 기존 모델과 융합하여 예보관이 예보하는 것이 필요하다고 사료된다.

• Korean Journal of Radiology
• /
• 제23권1호
• /
• pp.77-88
• /
• 2022

Objective: Our study aimed to evaluate the quality of radiomics studies on brain metastases based on the radiomics quality score (RQS), Transparent Reporting of a multivariable prediction model for Individual Prognosis Or Diagnosis (TRIPOD) checklist, and the Image Biomarker Standardization Initiative (IBSI) guidelines. Materials and Methods: PubMed MEDLINE, and EMBASE were searched for articles on radiomics for evaluating brain metastases, published until February 2021. Of the 572 articles, 29 relevant original research articles were included and evaluated according to the RQS, TRIPOD checklist, and IBSI guidelines. Results: External validation was performed in only three studies (10.3%). The median RQS was 3.0 (range, -6 to 12), with a low basic adherence rate of 50.0%. The adherence rate was low in comparison to the "gold standard" (10.3%), stating the potential clinical utility (10.3%), performing the cut-off analysis (3.4%), reporting calibration statistics (6.9%), and providing open science and data (3.4%). None of the studies involved test-retest or phantom studies, prospective studies, or cost-effectiveness analyses. The overall rate of adherence to the TRIPOD checklist was 60.3% and low for reporting title (3.4%), blind assessment of outcome (0%), description of the handling of missing data (0%), and presentation of the full prediction model (0%). The majority of studies lacked pre-processing steps, with bias-field correction, isovoxel resampling, skull stripping, and gray-level discretization performed in only six (20.7%), nine (31.0%), four (3.8%), and four (13.8%) studies, respectively. Conclusion: The overall scientific and reporting quality of radiomics studies on brain metastases published during the study period was insufficient. Radiomics studies should adhere to the RQS, TRIPOD, and IBSI guidelines to facilitate the translation of radiomics into the clinical field.

• 한국산학기술학회논문지
• /
• 제16권11호
• /
• pp.7844-7854
• /
• 2015

본 연구의 목적은 한국 여성 문제음주자의 음주실태, 건강행태, 건강관련 삶의 질과 우울의 정도를 파악하고, 건강행태와 건강관련 삶의 질이 우울에 미치는 영향을 파악하는 것이다. 본 연구는 보건복지부와 질병관리본부에 의해 2010년 1월부터 2012년 12월까지 시행된 제 5기 국민건강영양조사의 원시자료를 사용하였다. 본 연구의 대상자는 AUDIT(Alcohol Use Disorder Identification Test)에 의해 8점 이상으로 분류된 여성 문제음주자 328명이었으며, 자료는 IBM SPSS 21.0 프로그램으로 복합표본 분석하였다. 연구결과, 높은 수준의 스트레스를 인지하는 대상자와 건강관련 삶의 질이 낮은 대상자는 우울을 경험할 위험이 증가하였다. 또한 1-4시간의 수면을 취하는 대상자는 8시간 이상 수면을 취하는 대상자에 비해 우울을 경험할 위험이 증가하는 것으로 나타났다. 그러므로 한국 여성 문제음주자의 우울 및 정신건강 향상을 위해 이에 영향을 주는 요인인 스트레스, 수면, 건강관련 삶의 질 향상에 관심을 가져야 할 것이다. 특히 위험도가 높았던, 높은 수준의 스트레스를 인지하는 여성 문제음주자의 우울 관리를 위한 치료적 지지체계가 계획되어야 할 것이다.

• 농촌계획
• /
• 제9권3호
• /
• pp.1-7
• /
• 2003

As the proportion of the elderly population in rural area is growing rapidly, the quality of life of the rural elderly is becoming a major concern. According to Rowe and Kahn(1997), active and productive engagement in society is a central component of successful aging. Yet, the effect of various social support network on psychological well-being of the rural elderly is not well known. This study is an attempt to empirically examine the connection between social support network and psychological well-being of the rural elderly. For this purpose, community welfare specialists gathered data from 1033 rural elderly in 32 villages, using structured questionnaires. The statistical methods used for the data analysis were descriptive statistics, cross tables, ANOVA and hierarchical regression analysis using spss wins 10.0 program. The major findings of this study are as follows: The majority of rural elderly have social support networks composed of more than one person and the mean number of their social support network was ten persons. The elderly who keep frequent contact with many adult children and friend/neighbor are happier than the elderly who keep contact with fewer number of children and friends. The size of the network of relatives significantly affects the level of loneliness of the elderly. Theoretical and practical implications of this study for the improvement of the quality of life of the rural elderly is discussed.

• Animal Bioscience
• /
• 제36권6호
• /
• pp.879-890
• /
• 2023

Objective: This study was conducted to evaluate the use of Megasphaera elsdenii (M. elsdenii) as a probiotic on rumen fermentation, production performance, carcass traits and health of ruminants by integrating data from various related studies using meta-analysis. Methods: A total of 32 studies (consisted of 136 data points) were obtained and integrated into a database. The parameters integrated were fermentation products, rumen microbes, production performance, carcass quality, animal health, blood and urine metabolites. Statistical analysis of the compiled database used a mixed model methodology. Different studies were considered random effects, while M. elsdenii supplementation doses were considered fixed effects. p-values and the Akaike information criterion were employed as model statistics. The model was deemed significant at p<0.05 or had a tendency to be significant when p-value between 0.05<p<0.10. Results: Supplementation with M. elsdenii increased (p<0.05) some proportion of fermented rumen products such as propionate, butyrate, isobutyrate, and valerate, and significantly reduced (p<0.05) lactic acid concentration, acetate proportion, total bacterial population and methane emission. Furthermore, the probiotic supplementation enhanced (p<0.05) livestock production performance, especially in the average daily gain and body condition score. Regarding the carcass quality, hot carcass weight and carcass gain were elevated (p< 0.05) due to the M. elsdenii supplementation. Animal health also showed improvement as indicated by the lower (p<0.05) diarrhoea and bloat incidences as well as the liver abscess. However, M. elsdenii supplementation had negligible effects on blood and urine metabolites of ruminants. Conclusion: Supplementation of M. elsdenii is capable of decreasing ruminal lactic acid concentration, enhancing rumen health, elevating some favourable rumen fermentation products, and in turn, increasing production performance of ruminants.

• 디자인학연구
• /
• 제13권2호
• /
• pp.55-63
• /
• 2000

95년 통계청(한국은행, KDI통계자료)의 자료를 보면, 우리나라 귀금속 장신구시장이 약 2조 8000억 원 규모로 보고되었는데, 이는 86년부터 95년까지 10년 간 년 평균 15.3%의 성장세를 나타내고 있으며 G.N.P 대비 0.78% 의 점유율을 보이고 있다. 이러한 귀금속 장신구 산업은 높은 성장 가능성을 가지고 있음에도 불구하고 산업의 구조적인 취약성으로 불법 거래의 만연, 보석의 품질 등급의 왜곡(다이아몬드의 경우 감정 기관에 따른 가격 차이, 금의 경우 금의 품위 조작 등)등의 문제를 낳고 있으며, 유통 업체의 영세성 등으로 우리나라 귀금속 장신구 산업 시장은 미국이나 일본 선진국에 비해 아직은 초기 단계라고 할 수 있다. 따라서 고부가가치 사업의 하나인 귀금속 장신구 산업을 발전시키기 위해서는 귀금속 장신구 업체의 유통 구조개선과 제품의 제작기법 및 새로운 디자인의 개발 등이 요구되며, 또한 귀금속 장신구 산업의 중요성과 국가 경제 기여도 및 업계의 장기 발전 전망에 대한 정확한 인식이 업계 전반에 확산되게 함으로서 귀금속 장신구 산업의 발전을 이루어 나갈 수 있을 것으로 확신한다.

• 치위생과학회지
• /
• 제21권1호
• /
• pp.8-18
• /
• 2021

The purpose of this study is to provide the general history of fostering dentists in Japan and introducing their new roles. This research was conducted based on the government policy report on dentists and the information published by each educational institution. Based on the collected data, the official websites were used to represent the latest statistics of the institutions. The number of dentists in Japan has increased. The government established the National Examination for Dentists to guarantee the quality of dentists. After the standards for developing questions for the national examination were established in 1985, the contents of the examination have been appropriately improved by revising the standards every four years. This improvement has required dental students to study a variety of subjects for six years at dental school. Since dentists in Japan are required to respond to various demands from the nation; the Model Core Curriculum for Dental Education was developed to teach medical ethics and abilities to ensure that dentists conduct themselves professionally. Recently, the roles of dentists have been changing in Japan. When providing dental services to older patients over the age of 65, dentists and other dental professions focus on maintaining oral functions, such as saliva secretion, bite force, tongue movement, and masticatory/swallowing functions. However, oral function-related services for children are different. In addition to providing essential dental services, dental practitioners also provide special treatment, such as oral muscle training, myofunctional therapy, health guidance, and space retainers to the child patients with developmental insufficiency in oral functions. Dentistry in Japan has undergone numerous changes over the years and has continued to offer high-quality dental health services. Thus, information gained from the Japanese experience may be helpful to dental professions in other developed countries for planning oral health measures.

• 품질경영학회지
• /
• 제46권1호
• /
• pp.1-10
• /
• 2018

Purpose: This paper provides an idea on the future prospect for change in steps of the six sigma DMAIC project under the environment of the 4th industrial revolution. Methods: First, the purpose and activities required in each step of DMAIC are reviewed. Next, activities are reviewed together with tools and techniques, considering the purpose and the environmental changes of the 4th Industrial Revolution. Finally, the best approaches for achieving the purpose are prospected to get an idea on future change. Results: The purpose of each phase of DMAIC is expected to remain unchanged. But activities, techniques, or methods will be replaced with more effective and efficient ones. Also, many activities may possibly be executed by a system instead of people like BB, GB or team members. Moreover, DMAIC may not be a project any more but a routine job of the system in the future. Conclusion: Under the environment of the 4th industrial revolution, many activities including analyzing various types of data and extracting valuable information, will be executed by a system with proper algorithms instead of people. And six sigma improvement projects may be intrinsic parts of the system and may not exist as separate projects any more.

• 한국의료질향상학회지
• /
• 제9권1호
• /
• pp.18-32
• /
• 2002

Background : We developed a model for predicting premature discharge and identifying related factors. Methods : Prediction model was developed by data mining techniques. Basic data were collected from the total discharge data base of a university hospital in Chungnam Province during the period from July 1, 1999 to June 30, 2000. Results : 1. Among 22,873 patients, the number of patients discharged with usual discharge orders were 21,695 or 94.8%. The number of the prematurely discharged patients were 1,178 or 5.2%. 2. The primary reason for unusual discharge was transfer to other hospital. Move to a local hospital closer to their home and burdensome medical expenses were main reasons. 3. Predictability of each model was tested using the top 10 percent of patients with the highest probabilities of premature discharge. The neural network model was chosen as the most appropriate model for predicting prematurely discharged patients. 4. Ten percent of the total number of patients had been selected randomly to test the effectiveness of the neural network model. We have chosen the threshold of the neural network model as 0.7. The number of patients who were expected to discharge prematurely was 312. Among them, 241 had been discharged prematurely (77.2%). Conclusion : Of the several data mining techniques used, the neural network model was the most effective, It can be used to identify and manage the patients who are expected to discharge prematurely.

• 농업과학연구
• /
• 제37권1호
• /
• pp.27-35
• /
• 2010

A study examined visitors' satisfaction to urban arboretum in Daejeon metropolitan city, and analyzed utilization status. Also, the study was based on POE. POE is a last phase in the environmental planning and design process that follows the sequence of planning, programing, design construction, and use of a project. Urban arboretum contribute to improvement in the quality of living by providing urban citizens with places for refreshment, natural have important values on urban environment and to promote the quality of life for urbanite. So, the study aims to present data on the human activities responding to the physical environment of 'the Daejeon Hanbat Arboretum' by evaluating visitor's behavior and activity, visiting motivations, preference patterns, and the degree of visitor's satisfaction. This study is conducted by multi-method such as interviews and questionnaires surveys. On-site questionnaire surveys were conducted in the Hanbat arboretum on October 25-31 of 2009. Total of 265 questionnaires were analyzed for this study. The analysis of data was used SPSS 18.0 statistical analysis program. Data from visitors was analyzed by descriptive statistics, frequency analysis, multiple response analysis, and Anova. Then, the outcome will be compared and evaluated to install urban arboretum that reflect the desires of users in the future.