• 대한기계학회논문집B
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• 제34권4호
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• pp.333-339
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• 2010

고장감지 및 진단(FDD) 시스템의 구축의 기초 연구로 정상상태 진단기에 대한 연구를 수행하였다. 정상상태에 대한 진단은 시스템 전체를 관찰하거나 몇몇 필요한 시스템 파라미터를 모니터링 함으로써 가능하다. 최적화된 정상상태 진단기를 이용하면 FDD 시스템에서 필수적인 정상운전 시의 기준모델(no fault reference model)을 자가학습을 통하여 적용할 수 있다. 본 연구에서는 가정용 열펌프가 냉방조건으로 작동할 경우에 대해 이동창을 기반으로 7개의 측정값들에 대한 표준편차를 분석함으로써 정상상태 판정을 내리도록 하였다. 정상상태 진단기의 작동의 여부는 실내부하를 조절함으로써 확인하였다. 본 연구를 통하여 열펌프 등의 증기압축 사이클 시스템에 대하여 이동창을 기반으로 한 정상상태 진단기 개발 방법을 제시하였다.

• Journal of Oral Medicine and Pain
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• 제11권1호
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• pp.67-78
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• 1986

This study was attempted to identify the emotional characteristics of temporomandibular disorder patients. The author applied one of the self-report modes of psychological measurement, Symptom Chechlist-90-Revision. The subjects were 219 TM disorder patients who visited the Department of Oral Diagnosis and Oral Medicine, Seoul National University Hospital during the period from December 1985 to September 1986. All the patients were divided into subgroup according sex, age, duration of symptoms, presence or absence of T-scores of each symptom dimension and global index. The obtained result were as follows : 1. Mean value of T-scores of each symptom dimension and global of the overall patients was within normal range. The two higher mean values of T-scores among 9 symptom dimensions were those of SOM and ANX. 2. Mean values of T-scores of females were higher than those of males in the O-C, DEP, ANX, HOS, PSY dimensions and all global indices, and there was a significant difference in the distribution of T-scores of the SOM dimension between males and female(P<0.05). 3. There was no significant difference between the subgroup under 30 years and the subgroup 30 years or older. 4. The subgroup with symptoms for 6 months or longer showed the higher mean values of T-scorers in the SOM, O-C, I-S, DEP, ANX, PHOB, PAR, PSY dimensions and all global indices compared with the subgroup with symptoms for shorter than 6 months. 5. The subgroup with pain showed the higher mean values of T-scores in all the symptom dimensions except the PAR in comparison with the subgroup with other complaints than pain, and there was a significant difference in the distribution of T-scores of the PST index between the pain subgroup and the non-pain subgroup(P<0.05). There was a significant difference in the distribution of T-scores of the PHOB dimension between the high-school graduates subgroup and the college graduates subgroup(P<0.05).

• 대한골관절종양학회지
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• 제5권1호
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• pp.17-22
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• 1999

Over 60 cases were enlisted, but only 31 cases among 24 patients were eligible with a minimum follow-up of 1 year and complete medical documents with imaging data. There were 18 boys and 6 girls, and 7 patients had bilateral lesions. The age of the patients ranged from 2 to 20 years(mean:10.5 years). At their first visit, most lesions had a highly characteristic location and radiographic appearance of radiolucent lesion(s) ranging from 1 to 3cm, except for one case of 5.5 cm in the posteromedial comer of distal femoral metaphysis. The margins were generally well-defined, although some were ill-defined. After reviewing our cases from the viewpoint of clinical course and radiographic patterns, we divided these lesions into two types. Type I is the osteolytic lesion excavated into the posteromedial aspect of the distal femur without cortical defect; and type II is the buldged out lesion of the femur with cortical irregularity into the surrounding soft tissues. Both types have distinctive clinical courses. Type I lesions were easy to make a definite diagnosis with plain radiographs alone, but in type II, it was sometimes very difficult to differentiate it from malignant tumors or chronic localized osteomyelitis. For this lesion, Gd-enhanced MRI was the most effective method for differential diagnosis. In this study, biopsy was not necessary to confirm the diagnosis. Clinical symptoms of type I were very minor or even absent. Many of them were accidentally found after minor trauma around the knee joint. Clinical symptoms disappeared far earlier than radiographical lesions. No treatment such as restriction of activity or drugs was necessary. For type II, the clinical symptoms were more accentuated and lasted longer, and it was necessary to restrict the activity for a certain period in many cases. However, all were self-limited.

• 보건행정학회지
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• 제9권1호
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• pp.72-109
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• 1999

This study is conducted to investigate the current status on the utilization of health care and plan for solving this problem. The claims data of the fiscal tear 1995 obtained from the regional health insurance society are used for the study. The main findings of the study are summarized as follows. Indexes(The Extremal Quotient(EQ), coefficients of variance(CV's))which represent the regional difference in the admission rate of the tertiary medical diagnosis group report that there is difference in quantity and quality of utilization of health care. The admission rate is lower in the big city areas, Kyoungkido, Kangwondo and Chunlapukdo. Even after age-sex adjustment, the admission rate is still low in Kangwondo, Chunlapukdo and Kyoungsangpukdo. The big city areas tend to have higher rates in the expenses per claim, hospital days per claim, and daily expenses but the rates are still low in some area in Kangwondo, Chunlanamdo and Kyoungsangpukdo. This result remains as same after age-sex adjustment. There is a large regional difference in average utilization rate for the tertiary hospital of the tertiary medical diagnosis group: 57.2%(SD 11.53). The utilization rates for the tertiary hospital in their large catchment area are 96.34%, 83.19% and 73.22% in each Kyoungin, Kyoungnam and Kyoungpuk areas whereas it is lower in a Chungpuk and Chungnam areas. The regional differences of health care utilization of the tertiary medical diagnosis group gave some relationships with their geographical characteristics such as socio-economic characteristics and supply factors of medical services. It is important that many medical policies should be developed in order to minimize and balance out the regional differences of health care utilization. The service allocation policy should include the reconstruction of manpower policy, developing the resource allocating formula, finding the self-sufficient catchment area and reforcing of public health services. Moreover, in order to achieve the balanced development by region, they should investigate and consider each county's microscopic properties under the consistent macrocopic policy. The further studies to find causes of regional difference are needed.

• Journal of Periodontal and Implant Science
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• 제48권2호
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• pp.114-123
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• 2018

Purpose: The aim of the current study was to develop a computer-assisted detection system based on a deep convolutional neural network (CNN) algorithm and to evaluate the potential usefulness and accuracy of this system for the diagnosis and prediction of periodontally compromised teeth (PCT). Methods: Combining pretrained deep CNN architecture and a self-trained network, periapical radiographic images were used to determine the optimal CNN algorithm and weights. The diagnostic and predictive accuracy, sensitivity, specificity, positive predictive value, negative predictive value, receiver operating characteristic (ROC) curve, area under the ROC curve, confusion matrix, and 95% confidence intervals (CIs) were calculated using our deep CNN algorithm, based on a Keras framework in Python. Results: The periapical radiographic dataset was split into training (n=1,044), validation (n=348), and test (n=348) datasets. With the deep learning algorithm, the diagnostic accuracy for PCT was 81.0% for premolars and 76.7% for molars. Using 64 premolars and 64 molars that were clinically diagnosed as severe PCT, the accuracy of predicting extraction was 82.8% (95% CI, 70.1%-91.2%) for premolars and 73.4% (95% CI, 59.9%-84.0%) for molars. Conclusions: We demonstrated that the deep CNN algorithm was useful for assessing the diagnosis and predictability of PCT. Therefore, with further optimization of the PCT dataset and improvements in the algorithm, a computer-aided detection system can be expected to become an effective and efficient method of diagnosing and predicting PCT.

• 대한소아치과학회지
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• 제47권3호
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• pp.293-302
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• 2020

이 연구의 목적은 가상현실 시뮬레이션을 이용한 소아환자 치아우식 진단 경험에 대한 설문조사를 통하여, 임상 실습 전 단계의 치의학 전공 학생들을 대상으로 소아치과적 교육에서의 활용 가능성을 평가하는 것이다. 소아 환자 모델로 유치열기의 5세 여아를 개발하였고, 가상현실 속 진단을 위한 치아 우식 모델을 제작하였다. 치의학 전공 학생들은 15분에 걸친 치아 우식 진단 시뮬레이션을 경험한 뒤, 설문지를 통하여 프로그램 사용 경험을 통한 실재감 및 응용 가능성을 평가하였다. 그 결과, 가상실재감과 외양 평가에서 높은 점수를 얻었다. 또한, 가상현실을 통한 치아 우식 진단 시뮬레이션은 임상 실습 전, 후의 학년, 성별, 가상현실 체험 경험의 유무에 따른 유의미한 차이가 없다는 설문 결과를 얻었다. 이 프로그램을 지속적으로 발전시킨다면, 치의학 교육 분야에 응용 가능성이 높아질 것이다.

• 복식
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• 제62권4호
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• pp.58-68
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• 2012

Personal image concerns a person's talent, expertise, as well as the internal and external image. It is a core value that differentiates one individual from another. As personal branding via personal image management has become more important, there is a fast-growing number of online systems that provide self-test programs to analyze one's style and habits and also provide expert advice for not only styles but lifestyles as well. This study develops a systematic and objective personal image consulting system and offers basic information for the research of personal image making. For that purpose, the study attempts to examine the present state of global companies that use online image consulting programs and analyze their digital content. The results are as follows: 1) two domestic companies, Colorz and Atzine, and seven foreign companies, notably Covet and Boutique, were brisk in business; 2) two types of personal image-diagnosis programs - Visual search and Virtual matching - are now in operation; and 3) mobile applications exist as an evolved personal image-diagnosis program. With an increased interest in such programs, various companies at home and abroad are establishing systematic and scientific analysis systems, which are needed for personal image-making online. Under these circumstances, domestic companies are also urged to enhance levels of image-diagnosis content and actual commercialization and utilization, to develop programs that enable objectified, systematic personal image-making. To this end, the results of this study may serve as a helpful tool to consider future directions.

• 동의신경정신과학회지
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• 제23권4호
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• pp.107-122
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• 2012

Objectives : The purpose of this study is to examine the general personality profiles of patients who visited an oriental neuropsychiatric clinic and to investigate the specific profiles of patients diagnosed with Hwa-byung. Methods : We analyzed the profiles of 122 patients who completed TCI-RS questionnaire for the purpose of counseling. Patients were divided by sex, age and diagnosis related groups. Scales and subscales of each group were compared by an independent t-test and ANCOVA with SPSS windows 16.0. Types of temperament and character were classified by percentile ranks of the total patients and diagnosis related groups. Results : 1. Total patients were classified as the high harm avoidance type of temperament and of low self-directedness type of character. 2. Male patients showed significantly higher scores on NS, all subscales of NS, P2 and P3 than female patients. HA4 and C5 scores were significantly higher in the female group. Younger patients showed significantly higher scores on NS, all subscales of NS, HA1 and P3. However, older patients had significantly higher scores on SD4, SD5, ST2 and ST3. 3. Between diagnosis related groups, Hwa-byung group had significantly higher scores on RD, ST, SD3 and ST2. However P3 score of non-hwa-byung patients was higher than hwa-byung patients. In typical classification, both hwa-byung and non-hwa-byung groups were classified as the same types as total patients. Conclusions : This study showed that the patients visited an oriental neuropsychiatric clinic and had similar personality with that of general psychiatric disorders. Hwa-byung patients exhibited higher RD and ST scores than other disorders, but they had no typical differences.

• 한국통신학회논문지
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• 제31권10C호
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• pp.964-972
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• 2006

신장은 간장과 가장 유기적인 관계가 깊은 장기로 혈액 중에서 체내 신진대사 결과 생긴 노폐물을 걸러내 오줌을 만들어 체외로 배출하는 기능을 한다. 그러나 신장은 문제가 발생할 경우 인체가 느끼는 자각증상이 크지 않기 때문에 장기 파손이 상당 부분 진행되어야 그 증상을 알게 된다. 따라서 사회적으로 신장 질환 진단에 대한 중요성이 증대되고 있다. 이를 위해 본 논문에서는 한방의 4대 진단법 중에서 망진과 청진 분야를 이용하여 신장질환에 대한 진단 방법을 제안하고자 한다. 본 논문에서 개발할 시스템은 크게 두 가지로 나누어진다. 하나는 입력 영상에 대한 보정을 통해 정확한 색상 값을 추출하고 최적화된 결과 영상을 통해 신장과 관련된 얼굴에서의 지각 부분의 색을 분석하고 그 값을 이용하여 신장 질환 진단을 하고자 한다. 또 하나는 신장과 음성 신호와의 관계론 비교, 분석하여 이를 입증하는 시스템을 설계하고자 한다. 끝으로 실험을 통해 제안한 방법의 유용성을 입증하고자 한다.

• 한국의료질향상학회지
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• 제3권1호
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• pp.126-143
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• 1996

Background : Little work has been carried out regarding quality assessment research in a primary care setting, comparing with that of hospitals. This study aims to evaluate the process of diagnosis and management of hypertension by public health doctors on the basis of pre-established clinical guideline, and to identify several modifying factors associated with them. Methods : Hypertension was selected as the target disease, because it is a chronic disease which is of great public health importance. Self-administered questionnaires were mailed to public health doctors practicing at health centers and health subcenters across the nation. The response rate was 20.9%. The questionnaire included the diagnosis and management process such as measuring blood pressure, history taking, physical examinations, and treatment approches and potentially modifying factors such as level of training, duration of practice as a public health doctor, and education on management of hypertension. Results : Public health doctors pay little attention in measuring BP, hypertension related history taking, performing physical examination and laboratory examination. But they devoted much effort in diagnosing hypertension exactly and giving nonpharmacological treatment. Among various antihypertensive drugs, calcium-channel blockers were the most preferred agent(50.9%). Level of training, duration of practice ad a public health doctor, and education on management of hypertension made no difference on quality of care(p>0.05). Conclusion : These public health doctors showed poor compliance with the pre-established clinical guidelines, which leaves much to be desired in diagnosing and managing hypertensive patients by public health doctors. This study might be able to contribute to develop some strategies, such as educational programs, which would be able to improve the process of care in hypertensives.