• 대한치위생과학회지
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• 제4권1호
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• pp.53-64
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• 2021

Background: The elderly in long-term care facilities tend to have a diminished oral health status, with a high prevalence of dental caries and periodontal disease, as reduced cognitive function, joint mobility, and gait ability hinder the performance of oral hygiene. To improve the oral health of the elderly at long-term care facilities, it is necessary to have precise guidelines for oral health care and assessment; however, such guidelines are not readily available. Therefore, the present study aimed to develop an oral care assessment tool with verified reliability and validity. Methods: The participants in this study were 100 elderly patients at a care facilities and 10 clinical dental hygienists. Collected data were analyzed using the descriptive statistics, content validity index, and inter-rater reliability, as well as the analyses of intra-class correlation coefficient. Results: After a review of relevant literature, a preliminary questionnaire comprised of seven questions related to the evaluation of oral health was formed. After revising and supplementing the questions through a content validity test, a total of nine questions were selected. Conclusion: The novel assessment tool developed for the present study is anticipated to allow analyses of the level of problems related to oral health care before routine and professional care. Moreover, regular oral health status check-ups will enable the early diagnosis and treatment of diseases.

• 한국해안·해양공학회논문집
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• 제33권6호
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• pp.238-245
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• 2021

본 연구에서는 LSTM 모델을 활용하여 낙동강 하구역의 DO 농도 예측을 위한 최적 모델 조건과 적합한 예측변수를 찾기 위한 Case study를 수행하였다. 모델 매개변수 case study 결과, Epoch = 300과 Sequence length = 1에서 상대적으로 높은 정확도를 보였다. 예측변수 case study 결과, DO와 수온을 예측변수로 했을 때 가장 높은 정확도를 보였으며, 이는 DO 농도와 수온의 높은 상관성에 기인한 것으로 판단된다. 상기 결과로부터 낙동강 하구역의 DO 농도 예측에 적합한 LSTM 모델 조건과 예측변수를 찾을 수 있었다.

• Computers and Concrete
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• 제33권4호
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• pp.445-469
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• 2024

The Federal Highway Administration (FHWA) has recommended the use of AASHTOWare Pavement Mechanistic-Empirical Design (PMED) software for Roller-Compacted Concrete (RCC) pavement design, but specific calibration for RCC is missing. This study investigates the software's capacity to predict the long-term performance of RCC roadways within the framework of conventional concrete pavement calibration. By reanalyzing existing RCC projects in several U.S. states: Colorado, Arkansas, South Carolina, Texas, and Illinois, the study highlights the need for specific calibration tailored to the unique characteristics of RCC. Field observations have emphasized occurrence of early distresses in RCC pavements, particularly transverse-cracking and joint-related issues. Despite data challenges, the AASHTOWare PMED software exhibits notable correlation between its long-term predictions and actual field performance in RCC roadways. This study stresses that RCC applications with insufficient joint spacing and thickness are prone to premature cracking. To enhance the accuracy of RCC pavement design, it is essential to discuss the inclusion of RCC as a dedicated rigid pavement option in AASHTOWare PMED. This becomes particularly crucial when the rising popularity of RCC roadways in the U.S. and Canada is considered. Such an inclusion would solidify RCC as a viable third option alongside Jointed Plain Concrete Pavements (JPCP) and Continuously Reinforced Concrete Pavements (CRCP) for design and deployment of rigid pavements. The research presents a roadmap for future calibration endeavors and advocates for the integration of RCC pavement as a distinct pavement type within the software. This approach holds promise for achieving more precise RCC pavement design and performance predictions.

• 한국구조물진단유지관리공학회 논문집
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• 제20권4호
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• pp.19-26
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• 2016

최근 층간소음을 저감시키기 위하여 밀도와 동탄성계수가 낮은 바닥완충재를 뜬바닥구조에 사용하며, 이로 인하여 바닥완충재의 처짐 및 상부 마감몰탈의 균열이 발생할 가능성이 높아지고 있다. 이 연구에서는 층간소음 저감을 위하여 사용되는 바닥완충재의 장기처짐을 실험을 통하여 평가하였다. 완충재의 재질, 하부형상, 밀도, 가력하중을 변수로 하는 16개의 바닥완충재에 대하여 490일간의 장기처짐 실험을 하였다. 실험에 의하면 완충재의 장기처짐은 하중가력 200일 시점 이후로 일정한 경향을 보였다. 예외적으로 Polystyrene 재질의 완충재 경우, 250 N 하중재하에서는 160일, 500 N 하중재하에서는 100일 이후로 일정한 경향을 보였다. 이 연구에서는 처짐이 일정해지는 구간을 제외한 증가 구간에 대해 두 가지의 장기처짐 평가식을 작성하였으며, 각각 ISO 20392와 실험값의 추세를 이용한 선형회귀 분석을 이용하였다. 두 평가식과 실험값과의 비교분석에서 처짐량이 10 mm 이하의 경우, ISO 20392와 실험값의 추세를 이용한 선형회귀 분석 방법 모두 오차 0.4 mm 이하로 실제 처짐과 유사하게 나타났다. 단, Polystyrene 재질의 완충재 경우, ISO 20392에 의한 처짐 분석 방법이 더 적절한 것으로 판단되었다.

• 한국물환경학회지
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• 제25권2호
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• pp.295-305
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• 2009

The purpose of this study was to understand of water quality characteristics of lake Paldang, especially at a certain representative site, right in front of Paldang dam ($P_2$ site) and to propose the directions of water quality management of lake Paldang. Water characteristics at $P_2$ site was investigated by principle components analysis and the Pearson correlation coefficient analysis. Also, seasonality was identified by the Kruskal-Wallis test and long term trend of nutrients and chlorophyll-a was analyzed by seasonal decomposition method at lake Paldang statistically. The primary factor affecting on water quality at $P_2$ site was identified as nutrients, while physical parameters, such as rainfall and inflow rate were also important factors. At the result of linear regression analysis particulate organic phosphorus (POP) vs total phosphorus (TP) showed very high correlation of 0.78. TP loading was increased annually from 1995 to 2006. Chlorophyll-a and nutrients show seasonality at $P_2$ site. Long term trend of Chlorophyll-a was increased by increase of TP at lake Paldang.

• 한국콘텐츠학회논문지
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• 제14권7호
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• pp.346-355
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• 2014

본 연구의 목적은 시설거주 여성노인의 일상생활동작이 반영된 기초신체활동을 측정하여 대상자들의 기초신체활동의 기본적인 필수 측정요소와 측정항목을 제시하기 위함이다. 대상자는 대전과 충남에 소재한 장기요양시설 4곳의 만 65세 이상 여성노인 105명이며, 일상생활동작이 반영된 8개 항목(악력, 스텝 테스트, 의자에서 앉았다 일어나기, 한발 서기, 기능적 팔 뻗기, 8자 보행, 5m 보행, 일어서고 걷기)을 측정하였다. 자료는 평균과 표준편차, 요인분석, ANOVA, 그리고 피어슨의 상관관계로 분석하였다. 연령집단 간각 종목의 평균을 분석한 결과 연령이 증가함에 따라 각 측정항목의 결과에 유의한 차이를 나타냈다. 8개 측정항목은 요인분석을 통해 근력과 이동능력 두 영역으로 제시하였다. 시설거주 여성노인에게 중요한 체력요소인 이 근력과 이동능력 영역은 연령이 증가할수록 모두 유의하게 감소하였다. 따라서 시설거주 여성노인의 운동을 위한 간호전략에 있어 근력 및 이동능력의 요소가 고려되어야 하며, 이 두 영역에 대한 측정항목 또한 객관적인 지표가 마련되어야 한다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제19권4호
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• pp.351-361
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• 1997

This study was performed to evaluate the change of the soft tissue facial profile after mandibular set back surgery during time intervals. For this study, 33 patient, 8 males and 25 females, were selected and their lateral cephalograms were taken and analyzed periodically. Hard and soft tissue changes during postoperative time intervals, correlation between surgical skeletal changes and postoperative soft tissue changes, and prediction for long-term soft tissue changes were established through varying statistical methods. The results were as follow : 1. There were meaningful changes of anteroposterior skeletal position at 6 months and 2 years after mandibular set back by mandibular ramus osteotomy. Two years postoperatively, there was 30%, 32%, 29% relapse on B point, pogonion, menton each. 2. Two years after the mandibular ramus osteotomy, the relative changes of the soft tissue to their osseous counterparts showed 76% on the lower lip and 91% on the pogonion. 3. The movements of the mandibular landmarks in correlation to anteroposterior position of the lower lip and soft tissue of the chin showed to be effective on a long-term basis. 4. Using surgical changes of pogonion, prediction of changes in soft and hard tissue pogonion was useful and the coefficient of determination was 0.46 each and their reliability decreased 2 years postoperatively. 5. The upper lip position after the mandibular set back surgery was somewhat anterior 2 years postoperatively, but that has no statistical meanings.

• 디지털융복합연구
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• 제13권1호
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• pp.321-329
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• 2015

본 연구는 요양병원에 근무하는 요양보호사의 이직 및 예측요인을 파악하고자 시도 되었다. 연구대상자는 K시와 B시에 소재하는 3개 요양병원의 150명이었다. 자료수집을 위한 조사는 구조화된 설문지에 의해 수집되었다. 자료분석은 SPSS/WIN 18.0 프로그램을 이용하여 t-test, One way -ANOVA와 multiple regression을 분석하였다. 연구결과 이직과 자기존중감, 직무 만족도 사이에 유의한 음의 상관관계가 있는 것으로 나타났으며, 요양보호사 이직에 영향을 미치는 요인은 조직몰입(${\beta}=.59$, p<.001), 사회적 지지(${\beta}=.32$, p<.001)가 이직의도의 40% 설명하였다. 본 연구에 의하면 요양병원에서 이직율 감소를 고려한 효율적인 교육프로그램 개발이 요구된다.

• 한국토양비료학회지
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• 제31권4호
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• pp.330-333
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• 1998

본 시험은 석회 및 규산의 시용이 콩의 수량 및 종실에 미치는 영향을 조사하기 위하여 수행하였다. 콩의 수량은 NPK+석회 $1.5Mg\;ha^{-1}$ 처리가 가장 높았다. 탄수화물 함량은 무비에서 가장 높았고 단백질 함량은 NPK+석회 $1.5Mg\;ha^{-1}$ 및 NPK+규산 $1.5Mg\;ha^{-1}$ 처리구에서 높았으며 지방 및 회분함량은 NPK+규산 $1.5Mg\;ha^{-1}$ 처리구에서 높았다. 무기성분 함량은 처리간에 차이가 없었다. $P_2O_5$/T-N과 탄수화물 사이에는 $-0.99^{**}$, $P_2O_5$/T-N과 지방 사이에는 $-0.94^{**}$의 상관이 있었다. 그리고 Mn과 탄수화물사이에는 $0.95^*$의 상관이 있었다. 석회의 시용은 콩의 수량에, 규산의 시용은 단백질 함량증가에 효과적이었다.

• 가정∙방문간호학회지
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• 제30권1호
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• pp.26-36
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• 2023

Purpose: This study investigated the organizational culture in hospital for infection control, moral sensitivity, and the degree of infection control among long-term care hospital nurses, and to identified the factors associated with infection control perfomance. Methods: 186 nurses who directly care for patients at seven Long-Term Care Hospitals in D Metropolitan City participated in the survey. Data were collected using self-reported questionnaires and analyzed using the IBM SPSS 26.0 software. Results: Moral sensitivity showed statistically significant differences in age (F=5.473, p=.065), clinical experience (F=8.890, p=.031), nursing hospital work experience (F=6.520, p=.038), religion (t=-2.01, p=.046) and position (t=-2.96, p=.003). Correlation analysis revealed that with moral sensitivity and effect of organizational culture on infection control, there was a positive correlation between infection control and patient-centered nursing (r=.201, p<.006), professionalism (r=.149, p<.042), benevolence (r=.303, p<.001), infection control organizational culture (r=.556, p<.001). Benevolence of moral sensitivity (β=.21, p=.001) and infection control organizational culture (β=.54, p<.001) were associated with infection control perfomance. Moral sensitivity (including patient-centered nursing, professionalism, and benevolence) and infection control organizational culture explained 33.8% of the variance in infection control (F=24.57, p<.001). Conclusion: It is important to improve the moral sensitivity of nurses and a positive organizational culture for better infection control. We need to develop intervention strategies and establish systematic and administrative support.