• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.1802-1809
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• 2011

A distribution method of limited budget for rail line facility improvement is to use investment priorities of rail line segments based on their deterioration. In this paper we present an evaluation method of rail line segment deterioration which can be used to distribute limited budget. Rail line facilities include rail track, crossing, road bed, bridge, tunnel. These facilities deterioration and line shape can affect line segment deterioration. Deterioration evaluation method we present is a weighted sum of each component deterioration scores. The component weight can be obtained from experts using analytic hierarchy process.

• 한국철도학회논문집
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• 제14권6호
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• pp.569-574
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• 2011

정된 예산으로 철도선로시설을 개선하고자 할 때 사용할 수 있는 효과적인 예산배분 방법 중 하나는 가장 노후도가 심각한 선로구간부터 우선적으로 예산을 투입하는 것이다. 본 논문에서는 예산배분에 사용할 수 있는 선로구간 노후도 평가방법을 제시한다. 선로구간의 노후도는 궤도, 분기기, 노반, 교량, 터널 등 요소 시설물의 노후도로 결정되며 궤도의 선형 또한 선로구간 노후도에 영향을 준다. 본 논문에서 제시하는 노후도 평가 방법은 각 요소의 노후도 점수에 AHP로 구한 요소 가중치를 반영하여 선로구간 노후도 점수를 구하는 것이다.

• 한국수자원학회논문집
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• 제50권10호
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• pp.673-679
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• 2017

본 논문에서는 상수관로의 효율적인 유지 관리를 위해 상수도 기술진단에서 점수평가법으로 도출된 관망성능평가결과를 이용한 상수도 관로의 내구연수 및 잔존수명 산정 방법을 제시하였다. 본 연구에서 잔존수명은 '모델에 의해 추정된 매설 후 최적교체시기까지 경과년수'를 의미하는 '내구연수'와 매설 후 경과년수의 차이로 정의하였으며, 내구연수는 관망성능평가기준으로 제시된 노후관로 판정기준 점수에 도달하는 시점으로 정의하였다. 연구대상지역의 관망성능평가에 사용된 평가항목들과 노후도 점수를 상수도 관로의 잔존수명 추정을 위한 다중회귀모델의 변수로 사용하였다. 잔존수명의 산정에 필요한 내구연수를 추정하기 위하여 구축된 회귀모델에 독립변수로 사용된 노후도 점수를 나타내는 변수의 값으로 노후관로 판정기준 점수에 해당하는 값을 대입하였다. 개발된 회귀모델을 이용하여 연구대상지역 상수도 관로의 내구연수 및 잔존수명을 산정하였으며 그 결과를 지방공기업법에서 제시하고 있는 내용연수와 비교하여 분석하였다.

• 디지털융복합연구
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• 제20권4호
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• pp.651-659
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• 2022

본 연구의 목적은 코로나19로 인한 가정경제 악화가 조손가정 청소년의 정신건강에 미치는 영향을 파악하는 것이다. 이를 위해 본 연구는 질병관리청에서 구축한 2020년 제16차 청소년건강행태조사의 원자료를 활용하여 코로나19로 인한 가정경제 악화 여부가 조손가정 청소년의 불안, 스트레스, 우울, 자살생각에 미치는 영향을 분석하였다. 연구질문에 대한 주요 결과는 다음과 같다. 첫째, 589명의 조손가정 청소년 중 39%가 코로나19로 인한 가정경제 악화를 경험했다. 또한 가정경제 악화를 경험한 청소년이 그렇지 않은 청소년에 비해 불안과 스트레스의 점수가 높았고, 우울과 자살생각의 경험 비율이 높았다. 둘째, 회귀분석 결과, 조손가정 청소년의 코로나19로 인한 가정경제 악화의 경험은 불안, 스트레스, 우울, 자살생각에 통계적으로 유의미한 정적 영향을 미쳤다. 본 연구의 분석 결과를 기반으로 코로나19와 같은 재난 상황에서 조손가정 청소년의 정신건강을 보호하기 위한 방안을 논의하였다.

• 한국경영과학회지
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• 제37권4호
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• pp.161-180
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• 2012

We develop some evaluation tool and indicators for the scores for medical equipment replacement in hospital. There has been no research for Korean hospitals although there are many for foreign medical institutions. In this paper, among many variables that were obtained from the previous studies, eleven variables are selected as indicators and tied as three groups. And then we obtain scores of medical equipments based on the weighted values of those indicators. We can make decisions whether we replace medical equipments or not by ranking the medical equipments based on the scores. This paper shows that we can make decisions to replace medical equipments very objectively and effectively using the evaluation tool and indicators we develop.

• 대한치매학회지
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• 제17권3호
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• pp.120-129
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• 2018

Background and Purpose: Prospective memory (PM) has a known relationship with frontal function, and PM decline has been observed in amnestic mild cognitive impairment (aMCI). Cerebral small vessel disease, as evidenced by white matter hyperintensities (WMHs), is linked to frontal dysfunction. This study was undertaken to evaluate the relationship between PM decline and WMHs in patients with aMCI. Methods: Of 74 enrollees with aMCI, 69 completed this prospective study. We compared total scores and sub-scores of the Prospective and Retrospective Memory Questionnaire (PRMQ) administered at baseline and 3 months later, stratifying patients by degree of WMHs. Results: A significant decline was seen in PRMQ total scores and PM scores at the 3-month mark in patients with moderate (vs. mild) degrees of WMHs ($-2.8{\pm}7.2$ vs. $0.2{\pm}7.1$; p=0.032). In addition, patients with moderate (vs. mild) degrees of deep WMHs (DWMHs) showed greater PM decline, whereas PM loss in patients with mild, moderate, or severe degrees of periventricular WMHs (PVWMHs) did not differ significantly. Conclusions: Findings of this study indicate that the burden of WMHs is consistently implicated in PM deterioration experienced by patients with aMCI, and signifies greater PM decline, especially in instances of extensive DWMHs. Greater attention to the change of PM is therefore needed in aMCI patients with WMHs.

• 대한후두음성언어의학회지
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• 제18권1호
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• pp.62-66
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• 2007

Objectives: There is a perception that a total laryngectomy has a devastating effect on patients and their families, but only a few studies have addressed long-term quality of life (QOL) after laryngectomy. Materials and Methods: A cross-sectional study of 32 patients more than 3 years since laryngectomy was performed. Patients were asked to complete the SF-36 questionnaire before surgery and within 3-5 years after surgery. Preoperative and postoperative SF-36 scores were compared with data on 46 age-matched healthy controls. Results: The most of SF-36 subscale scores showed significant deterioration after surgery. Preoperative scores had significantly poorer than the normal controls on 6 subscales, and also postoperative scores was lower than normal controls on 2 subscales. Conclusion: In the study, the quality of life of the patients who underwent total laryngectomy show poorer scores than pre operative status and normal controls.

• Journal of Preventive Medicine and Public Health
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• 제51권3호
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• pp.130-139
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• 2018

Objectives: Air pollution is a growing concern in Korea because of transboundary air pollution from mainland China. A panel study was conducted to clarify the effects of air pollution on respiratory symptoms and health-related quality of life (HR-QoL) in outpatients with and without chronic obstructive pulmonary disease (COPD) in Korea. Methods: Patients filled out a questionnaire including self-reported HR-QoL in February and were followed up in May and July. The study was conducted from 2013 to 2015, with different participants each year. Air quality parameters were applied in a generalized estimating equation as independent variables to predict factors affecting HR-QoL. Results: Lower physical fitness scores were associated with Asian sand dust events. Daily activity scores were worse when there were high concentrations of particulate matter (PM) less than $10{\mu}m$ in diameter ($PM_{10}$). Lower social functioning scores were associated with high PM less than $2.5{\mu}m$ in diameter and nitrogen dioxide ($NO_2$) concentrations. High $NO_2$ concentrations also showed a significant association with mental health scores. Weather-related cough was prevalent when $PM_{10}$, $NO_2$, or ozone ($O_3$) concentrations were high, regardless of COPD severity. High $PM_{10}$ concentrations were associated with worsened wheezing, particularly in COPD patients. Conclusions: The results suggest that PM, $NO_2$, and $O_3$ cause respiratory symptoms leading to HR-QoL deterioration. While some adverse effects of air pollution appeared to occur regardless of COPD, others occurred more often and more intensely in COPD patients. The public sector, therefore, needs to consider tailoring air pollution countermeasures to people with different conditions to minimize adverse health effects.

• 대한한방내과학회지
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• 제42권5호
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• pp.727-737
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• 2021

Objectives: This study investigated the effect of Korean medicine on an elderly patient with posterior circulation cerebral infarction, chronic kidney disease (CKD), and early neurological deterioration (END). Methods: The patient, who already had CKD, was treated with Korean medicine, comprising herbal medicine, acupuncture, moxa, and cupping combined with Western medicine (antiplatelet, diabetes) and physical therapy. A manual muscle test (MMT) and a modified Barthel index (MBI) were used to observe the treatment effects, and blood tests were performed to check estimated glomerular filtration rate (eGFR), creatinine and blood urea nitrogen (BUN), which represent renal function. Results: After the treatment, MMT, MBI, and renal function scores had increased. Conclusions: This study suggests that Korean medicine can effectively treat posterior circulation cerebral infarction with END in CKD, but further studies should be conducted.

• 대한한의학회지
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• 제37권4호
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• pp.36-44
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• 2016

Objectives: Granulocyte-colony-stimulating factor (G-CSF) mobilized bone marrow (BM)-derived hematopoietic stem cells could contribute to improvement of liver function. In addition, liver fibrosis can reportedly be prevented by the Rg 1 component of red ginseng. This study investigated the combined effect of G-CSF and red ginseng on decompensated liver cirrhosis. Methods: Four patients with decompensated liver cirrhosis were injected with G-CSF to proliferate BM stem cells for 4 days ($5{\mu}g/kg$ bid subcutaneously) and followed-up for 3 months. The patients also received red ginseng for 4 days (2 tablets tid per os). We analyzed Child-Pugh scores, Model for End-Stage Liver Disease (MELD) scores and cirrhotic complications. Results: All patients showed marked increases in White blood cell (WBC) and CD34+ cells in the peripheral blood, with a peak time of 4 days after G-CSF injection. Spleen size also increased after G-CSF injection, but not severely. At end of the study, 2 patients showed improvement in Child-Pugh scores, hepatic encephalopathy, and refractory ascites. During the clinical trial period, none of the 4 patients showed any other adverse events or deterioration of liver function. Conclusions: We conclude that G-CSF/red ginseng combination therapy is relatively effective in improving liver function and major complications of decompensated liver cirrhosis without adverse effects. Further clinical trials are warranted to assess the clinical effects of G-CSF for decompensated liver cirrhosis.