• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.19-19
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• 2016

오늘날, 보다 정밀한 대기기상 분석과 정확한 기상 예측을 위해 보편적으로 기상레이더를 활용하고 있다. 지표면과 가까운 저층에서 주로 발생하는 국지성 호우 및 돌발기상에 대한 대응을 위해서는 기상레이더 역시 저층 관측이 수반되어야 한다. 하지만, 국토 대부분이 산악지형으로 이루어진 우리나라에서는 산악지형에 의한 지형클러터와 빔 차폐의 영향을 피하여 원만한 기상관측을 위해 대부분의 기상레이더가 고지대에 설치, 운영되고 있다. 그럼에도 불구하고 낮은 고도각의 레이더 관측 자료에서는 여전히 지형 클러터 및 차폐에 따른 영향으로 인해 자료 품질의 신뢰성이 떨어질 수 밖에 없다. 현재 클러터나 차폐가 발생한 영역에 대해 상위 고도각의 자료를 이용하는 등의 방법으로 보정을 수행하고 있지만 각 고도각 관측 자료들의 시간적 차이가 발생함에 따라 부정확성이 발생할 수 있다는 단점이 있다. 따라서 본 논문에서는 차폐 영역 보정에 대한 처리를 위해 단일 관측자료 만을 이용하는 방법을 적용함으로서 시간적 불일치성에 대한 문제를 해결하고, 초단기 강수예측을 위한 강수에코의 정확한 추적을 위해 레이더 영상에 적응적인 차폐, 클러터 보정 기법을 제안한다. 제안 기법은 강수에코의 형태학적 구조에 기반한 차폐보정을 위해 영상 처리 기법의 한 종류인 모폴로지 기법을 적용함으로써 강수에코의 모양, 크기, 및 구조에 따라 침식 및 팽창 과정을 수행하여 클러터나 차폐로 인해 소실된 강수에코 영역을 보정한다. 실험결과 레이더 강수추정의 정확성 향상을 꾀할 수 있었으며, 강수 추적을 위한 강수에코의 형태학적 복원이 가능함을 확인하였다. 이로부터, 향후 저층관측 레이더 자료의 활용성 증대와 에코 형태에 기반한 강수 추적 알고리즘 개발 및 성능 향상에 활용될 수 있을 것으로 기대한다.

• Journal of Convergence for Information Technology
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• v.12 no.4
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• pp.77-84
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• 2022

The aim of this study was to identify the convergence influencing factors on disaster nursing core competencies of nursing students. The subjects of this study surveyed 187 nursing students in D city with a structured self-report questionnaire. Data were analyzed by the SPSS 18.0 program, t-test, ANOVA, correlation and multiple regression. The disaster nursing core competencies average mean score was 3.15(±0.40). Grade and satisfaction of clinical practice were the significant factors related to disaster nursing core competencies in these subjects. Disaster nursing core competencies was positively correlated with disaster perception, disaster attitudes and self-efficacy. The influencing factors on disaster nursing core competencies were self-efficacy(β=0.276), disaster attitudes(β=0.200) and grade(β=0.172). The explanatory power of these variables was 19.1%. Therefore, it is necessary to develop disaster related curriculum and subjects that can improve the disaster nursing core competencies based on the important factors affecting the disaster nursing core competencies.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.6 no.2
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• pp.174-182
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• 2003

Purpose: Non-alcoholic fatty liver disease (NAFLD) has been recognized as an important childhood liver disease, especially where the prevalence of childhood obesity is increasing. The purpose of this study is to clarify the usefulness of elevated serum aminotransferase activities and their ratio for predicting the presence of fatty liver and its severity in obese children. Methods: Forty-four children (M/F 29/15, age 4 to 16 years) with obesity (weight excess>20%) were analyzed retrospectively with medical records based on degree of obesity, bioelectrical impedence, serum aminotransferase activities, lipid profiles and ultrasonography. Results: 1) Ultrasonography was carried out in 34 cases. Elevated serum ALT was found in 89.7% (26/29) of the patients diagnosed as fatty liver by ultrasonography and decreased AST/ALT ratio (<1) was found in 96.6% (28/29). There was a strong correlation between elevated serum ALT (>45 IU/L) or decreased AST/ALT ratio (<1) and the fatty liver in obese children (p<0.05). 2) There was no significant correlation between the serum ALT or AST/ALT ratio and the degree of fatty liver (p>0.05). 3) There was a significant correlation between total cholesterol, triglyceride and fatty liver (p<0.05). Conclusion: Serum ALT activity and AST/ALT ratio were useful to predict the presence of fatty liver diagnosed by ultrasonography in obese children, whereas they were not useful to predict the degree of fatty liver. Therefore, to prevent fatty liver progressing to advanced liver disease, it is necessary to manage and monitor the obese children continuously, especially those who have predicting factors of fatty liver.

• Journal of Hospice and Palliative Care
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• v.11 no.4
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• pp.181-187
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• 2008

Purpose: In order to establish efficient palliative treatment plans. It is important to estimate the survival time of a terminally ill cancer patient as accurate as possible. Proper estimation of life expectancy aids not only in improving the quality of life of the patient, it also promotes productive communication between the medical staff and the patient. The aim of this study is to determine the efficacy of neutrophil-lymphocyte ratio as a predictor of survival time in terminally ill cancer patients. Methods: Between January 2004 and June 2007, 67 terminally ill cancer patients who were admitted or transferred for palliative care, were included. Patients were categorized into three groups by Neutrophil-Lymphocyte Ratio. Demographic characteristics, clinical characteristics and blood samples were analyzed. Results: In univariate analysis, survival time of the highest Neutrophil-Lymphocyte Ratio group (${\geq}12.5$) was significantly shorter than that of the others (hazard ratio (HR)=3.270, P=0.001). After adjustment for low performance status (ECOG score 4) and dyspnea, high Neutrophil-Lymphocyte Ratio (${\geq}12.5$) was significantly and independently associated with short survival time (HR=2.907, P=0.007). Neutrophil-Lymphocyte Ratio was also significantly increased before death (P=0.001). Conclusion: Neutrophil-Lymphocyte Ratio can be useful in predicting life expectancy in terminally ill cancer patients.

• Korean Journal of Head & Neck Oncology
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• v.30 no.1
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• pp.1-4
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• 2014

배경 및 목적 타액선 선양낭성암종은 느린 성장 속도와 늦은 원격 전이를 특징으로 하는 드문 상피성종양이다. 본 연구는 다양한 임상 병리학적 변수를 통해 선양낭성암종의 원격 전이에 영향을 주는 인자를 조사하고자 하였다. 대상 및 방법 1999년 10월부터 2011년 12월까지 본원 이비인후과에서 타액선 선양낭성암종으로 진단되어 치료 받은 44명(남자 19명, 여자 25명)을 대상으로 원격전이를 유발하는 위험 인자를 조사하였다. 8명의 환자는 배제 기준에 따라 제외하였다. 환자의 평균 연령은 54세였다. 환자의 병리 보고서, 종양의 크기, T 병기, 수술 절제연의 종양 존재 유무, 신경 조직 침습, 림프절 전이가 조사되었다. 결 과 15명의 환자가 원격전이가 있었으며 21명은 원격 전이가 없었다. 원격 전이를 유발할 수 있는 여러 인자들을 비교하였을 때, 원격 전이는 수술 절제연의 종양 세포 잔존(p=0.014), 종양의 크기(p=0.038), 진행된 T 병기(p=0.024)가 통계적으로 유의하게 연관성이 있었다. 림프절 전이와 신경 조직 침습은 원격 전이와 연관이 없었다. 결 론 종양의 크기, 진행된 T 병기, 수술 후 절제연의 종양 세포 잔존은 원격 전이의 예측 인자로 생각된다. 따라서 이에 해당하는 환자의 경우 더욱 철저한 관리 및 경과 관찰을 요한다.

• Journal of the korean academy of Pediatric Dentistry
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• v.30 no.4
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• pp.728-737
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• 2003

To evaluate microbial data and salivary measurements from clinically compatible, culture-based screening procedures employed with children younger than 36 months old. Plaque and stimulated saliva specimens were collected from 87 children. The pH of each saliva sample was measured before and after 0.94% lactic acid was added. Specimens were diluted and plated on selective media and non-selective media. Data collected were counts of mutans streptococci (MS) and lactobacilli (LB). In addition, total viable counts (TVC) of specimens, salivary pH and buffering capacity were also assessed. Each variable was compared to caries status of subjects. According to this study, the results were as followed: 1. Highly significant correlation with caries rates were found for counts of MS and LB. 2. The specific counts/ml saliva or plaque above which caries is predicted, or below which caries is not predicted were as follows: 1) Saliva MS; $10^5$ 2) Plaque MS; $2{\times}10^5$ 3) Saliva LB; $10^3$ 4) Plaque LB; $10^3$. 3. Salivary pH and buffering capacity versus caries status were not significant. 4. Microbial screening methods based on mutans streptococci had higher predictive values and odds ratios than methods for lactobacilli. 5. MS counts were clearly the best indicators of caries status in young children. This measurement can easily be obtained in a dental clinical setting both by conventional culture techniques, or commercial kits for MS recovery.

• Korean Journal of Psychosomatic Medicine
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• v.26 no.2
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• pp.172-178
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• 2018

Objectives : This study aimed to describe the use of over-the-counter (OTC) drugs and to identify predictors for their use in the elderly living alone. Methods : This is a cross-sectional study that enrolled 1,099 subjects. Data regarding socio-demographic status, medical condition, cognition, mood disorder and use of OTC drugs were collected using self-administered questionnaire and from a specific semi-structured interview by a trained nurse. Data regarding use of OTC drugs were analyzed using descriptive statistics. Logistic regression analysis was applied to examine factors associated with the use of OTC drugs. Results : The use of OTC drugs were reported by 35.4% of the subjects. Analgesics (13.6%) was the most frequent drugs. Depression (OR=1.10, 95% CI=1.10-1.87) and comorbidities measured by cumulative illness rating scale (CIRS) (OR=1.08, 95% CI=1.03-1.12) were significantly associated with the use of OTC drugs in the elderly living alone. Conclusions : Depression and severity of underlying medical conditions could be a predictor of the use of OTC drugs in the elderly living alone. The clinicians should be vigilant regarding the potential use of nonprescription medications in the elderly.

• Journal of the korean academy of Pediatric Dentistry
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• v.46 no.2
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• pp.139-146
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• 2019

This study aimed to analyze the association of midpalatal suture (MPS) maturation stages with skeletal maturation and age and to obtain references for establishing a treatment plan for rapid maxillary expansion (RME). Cone-Beam Computed Tomography (CBCT) images from 480 children (240 boys, 240 girls) aged 7 - 15 years were obtained. MPS maturation stages and cervical vertebral maturation indicator (CVMI) were evaluated, and the correlations between MPS maturation stages, CVMI, and age were determined using the Spearman's correlation test. The positive likelihood ratio (LHR) of CVMI for MPS maturation stages was calculated. MPS maturation stages and CVMI showed a strong correlation. Especially, CVMI 1 - 3 showed positive LHR greater than 10 for the diagnosis of stages A - C. MPS maturation stages and age were correlated strongly in girls and moderately in boys. Conventional RME produces the most favorable skeletal effect at CVMI 1 - 3 or those up to 12 years of age and fewer skeletal effects at CVMI 4 or at 13 years of age in girls and 13 - 15 years in boys. It is recommended to evaluate MPS maturation stages using CBCT before RME application at CVMI 5, 6 or at 14, 15 years of age in girls.

• Journal of the Korean Society of Radiology
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• v.17 no.3
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• pp.465-472
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• 2023

In predicting vascular disease, this study attempted to identify changes in the carotid intima-media thickness in patients who underwent carotid artery ultrasonography and hematological tests and to find out the effect of risk factors on the expression of atherosclerotic plaque. A retrospective analysis was conducted on 469 healthy adults who visited the hospital for the purpose of medical examination and performed carotid artery ultrasonography. As a result, carotid intima-media thickness, age, body mass index, waist circumference, systolic blood pressure, total cholesterol, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol and glucose were analyzed as significant predictors of atherosclerotic plaque (p<0.001). The risk ratio was calculated based on the cut off value of the risk factors of the atherosclerotic plaque determined through ROC curve analysis, followed by 8.06 times the carotid intima-media thickness, 7.53 times the age, 3.97 times the waist circumference and 2.02 times the glucose. Therefore, in this study it was possible to prepare a Korean standard for clinical risk factors that affect the presence of absence of atherosclerotic plaque and observation of carotid artery ultrasonography is thought to help diagnose or predict cardiovascular disease early.

• Korean Journal of Health Psychology
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• v.16 no.1
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• pp.1-14
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• 2011

Coercive treatment in mental health has undergone an immense period of philosophical and clinical debate and yet it remains as a highly important issue in which ideology and practice contradict each other. this study focused on the perceived coercion of the persons with mental disorder and analyzed how the characteristics of mental disorder(psychiatric symptoms, psycho-social functions, insight, and the degree of awareness on the need for treatment) and experiences in the process of hospitalization (legal status, coercive measures, and procedural justice) can predict perceived coercion. The participants of this study were 302 patients that has been hospitalized in the psychiatric ward within the period of 4 weeks. 195 participants(64.6%) were male and 106(35.1%) participants were female. MAES, BPRS, GAF, Insight, Legal Status, Coercive Measures, and Need for Treatment were measured. Regression analysis was used to analyze how much perceived coercion can be predicted by characteristics of mental disorder such as the patients' BPRS, GAF, insight, and need for treatment. As a result it showed that among the characteristics of mental disorder insight and awareness of the need for treatment were the main predictors and the characteristics of experiences during hospitalization such as procedural justice, coercive measures, and legal status all displayed significant predictability. As well as implications of results in a practical method of intervention to reduce perceived coercion, the paper discussed issues for limitations and future consideration.