• Imaging Science in Dentistry
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• 제45권4호
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• pp.205-211
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• 2015

Purpose: This study was performed to compare the accuracy of micro-computed tomography (CT) and cone-beam computed tomography (CBCT) in detecting accessory canals in primary molars. Materials and Methods: Forty-one extracted human primary first and second molars were embedded in wax blocks and scanned using micro-CT and CBCT. After the images were taken, the samples were processed using a clearing technique and examined under a stereomicroscope in order to establish the gold standard for this study. The specimens were classified into three groups: maxillary molars, mandibular molars with three canals, and mandibular molars with four canals. Differences between the gold standard and the observations made using the imaging methods were calculated using Spearman's rho correlation coefficient test. Results: The presence of accessory canals in micro-CT images of maxillary and mandibular root canals showed a statistically significant correlation with the stereomicroscopic images used as a gold standard. No statistically significant correlation was found between the CBCT findings and the stereomicroscopic images. Conclusion: Although micro-CT is not suitable for clinical use, it provides more detailed information about minor anatomical structures. However, CBCT is convenient for clinical use but may not be capable of adequately analyzing the internal anatomy of primary teeth.

• 대한의용생체공학회:의공학회지
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• 제18권2호
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• pp.157-166
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• 1997

Postural balancing in human is known to be maintained by the complex mechanism coupled with cerebellum, equilibrium organ of ear, proprioception and other various organs. We developed a Computerized Balance Evaluation and Training system(COBET system) to evaluate postural control and to rehabilitate geriatrics and disabled patient. In addition, 55 normal adult were tested to investigate the influencing factors on balancing posture. For the analysis of static postural sway, areas of the moving center of pressure were calculated under 8 different positions of subjects. And subjects were also asked to follow the visual targets on monitor for the evaluation of the dynamic postural sway. In comparison of the first and the second sets of tests, there was test-retest reliability($\textit{p}$< 0.05). The controllability of the static pmtwn sway was decreased as the ages of subjects increase. When the ages of subject are over 60, the controllability was significantly decrease4 The dynamic postural sway was significantly greater in the age groups of 7th and 8th decade than the younger groups. It is concluded that COBET system is a reliable system in the evaluation of postural sway. The COBET system is considered to be a valuable training modality for the disabled patients as well as the elderly.

• 구강회복응용과학지
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• 제16권3호
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• pp.187-196
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• 2000

This study was performed to offer convenience to determine the vertical dimension of occlusion of edentulous patients by investigating the interocclusal distances at physiologic rest position, at speaking of /m/ sound, and some korean short sounds, that is, /mem/ and /beb/ sounds, which were found in our previous study with dentulous subjects. Ten edentulous subjects - 6 men and 4 women - were selected for this study. The frequencies at speaking of /m/, /mem/, and /beb/ sounds were analyzed with Computerized speech lab($CSL^{TM}$, Model 4300B, Software version 5.X, Kay Elemetrics Co. U.S.A.). And the interocclusal distances at physiologic rest position and at speaking of /m/, /mem/, and /beb/ sounds were measured with K6 diagnostic system(Myo-tronics, Inc. U.S.A.). The results of this study were as follows ; 1. In the acoustic analysis by Computerized speech lab, frequencies of sounds of edentulous subjects with complete denture at speaking of /m/, /mem/, and /beb/ were similar to those of dentulous subjects. 2. In the linear correlation by Pearson's correlation coefficient, the interocclusal distance at physiologic rest position was most similar to those of speaking /mem/ sound, secondly /m/ sound, and thirdly /beb/ sound(p<0.05). In reliability by Cronbach's alpha, the results were reliable with alpha value 0.97. 3. It was found by Levene's test for equality of variance that the difference between men and women in the interocclusal distances at physiologic rest position and at speaking of /m/, /mem/, and /beb/ sounds was not statistically significant(p>0.05).

• 간호행정학회지
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• 제1권2호
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• pp.325-337
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• 1995

This study attempted to increase quality of nursing care by assessing the nurses' attitudes for computerization in nursing practice and ensuring right recognition and attitude for computerized system. Study subjects are 311 nurses who are working at 4 general hospitals. Those hospitals are selected according to the degree of computerized in Kyoung In Province. Study instrument consists of 20 items and 12 general questionnaire which was developed by Brodt and Stronge(1985) and modified by Lee(1991). Data collection was done from april 19th in 1995 to april 29th. Data gathered were analized number, t-test, ANOVA by using SPSS. The study results are as follows : 1. Study subject's attitude for computer application showed positive response as mean score of 3.44 especially nurses who had experience using computer showed 100% pro-response. 2. Study subject's attitude by age was significant statistically(F=3.9589, p=.0038), among them age 25-30 revealed the highest positive scores, and age 40 showed the lowest positive scores. 3. Study subject's attitude by education level showed no significant difference(F=1.4182, 2437), and those who are more educated showed more positive response. 4. Study subject's attitude by duty years showed no significant difference(F=2.2648, p=.0622), and those who had 7- 9 duty years had the highest positive attitude however those who have 10 duty years showed lowest positive attitude. 5. Study subject's attitude by position revealed no significant difference(F=2.0017, p=.1369), and the charge nurse groups who were using computer showed the highest scores. 6. Study subject's attitude by computerized type showed significant difference(F=23.9665, p=.0000), and G hospital which had computer system in nursing area obtained the highest positive scores. 7. study subject's attitude by presence of computer education showed no significant differenec(F=.9002, P=.3435), and non computer educated groups showed the highest positive response. 8. Study subject's attitude by computer education place revealed no significant difference(F=4.3723, p=.0020). and the groups who were taught individually or in the institution obtained the highest positive scores. 9. Study subject's attitude by duty year computer use showed no significant response(F=.9591, P=.3282), and groups of computer use showed the high degree of positive response. 10. Study subject's attitude by duty year using computer showed significant difference(F=5.9174, p=.0009),and the groups using computer for 6 years or group of 4-6 years showed the highest degree of positive response and the groups using computer for 1 year showed the lowest degree of positive response.

• 생물정신의학
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• 제12권2호
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• pp.181-188
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• 2005

Objectives:Hwa-byung has been studied clinically for several years and introduced as Korean Culture- Bound Syndrome. However, the definition and the diagnostic method are not yet clarified, and there has not been any sufficient comparative study on this disease entity. This study was conducted to determine the clinical symptoms and the profile of the neurocognitive functions in Hwa-byung(HB) and Major Depressive Disorder(MDD), and We wish to identify any critical factors that differentiate the disorders. Methods:A total of 102 participants were examined, including 34 participants with MDD, 34 with HB, and 34 healthy controls. The MDD and HB patients were recruited from among inpatients and outpatients at the National Medical Center for the period from May to December of 2004. As a major diagnostic tool of MDD, diagnostic reference of DSM-IV-TR was used and as HB's diagnostic tool, We used computerized neurocognitive function test. Psychiatric symptomatology was evaluated by the Beck Depression Inventory(BDI), and Symptom Checkist-90-Revision(SCL-90-R). Oneway ANOVA, Scheffe post-hoc test and Chi-Squre Tests were used for statistical analysis. Results:The participants in three groups did not differ in terms of age, sex, and education. Assessment of BDI indicated that the MDD group had significantly higher total score than the HB group. MDD and HB groups showed significantly higher total scores on the SCL-90-R in comparison to the controls. The MDD group was found to have significantly more symptoms of depression than the HB group, based on the depression subscale of the SCL-90-R. The computerized neurocognitive function test suggest several results 1) Within the memory domain, it was found that one of the two memory tests in MDD and HB groups were significantly impaired in comparison to the control group. 2) Within the attention domain, it was found that only the MDD group was significantly impaired in comparison to the control group. 3) Within the higher cortical function domain, it was found that significant impairment exist in MDD group and HB group compared to the control group; the severity of impairment was found to be more profound in the MDD group than in the HB group. Conclusion:These results suggest that both HB group and MDD group have significantly decreased neurocognitive function than the control group, and neurocognitive function of the HB group is better than that of the MDD group.

• 한국산학기술학회논문지
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• 제20권4호
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• pp.311-319
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• 2019

본 연구는 경도치매노인을 대상으로 컴퓨터 인지훈련 프로그램이 인지기능, 우울, 생활만족도와 일상생활활동에 미치는 효과를 알아보기 위해 시행되었다. 연구대상자는 요양병원에 거주하는 경도치매노인 32명으로, 무작위 대조군 전후설계를 사용하여 실험군과 대조군으로 16명씩 무작위 할당하고 실험군에는 8주 동안 주 1회, 총 8회 컴퓨터 인지훈련프로그램을 적용하였다. 컴퓨터 인지훈련 프로그램은 CoTras-G를 사용하였으며, 컴퓨터 인지훈련 프로그램의 효과를 알아보기 위해 실험군과 대조군에 사전, 사후 동일하게 MMSE-K, SGDS-K, ELS, BI를 실시하였다. 컴퓨터 인지훈련 프로그램이 미치는 효과에 대한 전 후간 차이 검증은 paired t-test, 중재 후 실험군과 대조군간의 변화량 차이 검증은 Mann-Whitney U 검정을 실시하였다. 그 결과 실험군이 대조군에 비해 중재 후 인지기능(t=-4.39, p=0.001), 우울(t=4.11, p=0.001), 생활만족도(t=-8.53, p=0.000)와 일상생활활동(t=-3.10, p=0.007)에서 유의미한 향상을 보였으며, 실험군과 대조군의 사후 비교결과 인지기능(U=54.00, p=0.005), 우울(U=76.50, p=0.045), 생활만족도(U=56.00, p=0.007)와 일상생활활동(U=59.50, p=0.008)에서 유의미한 차이를 보였다. 따라서 본 연구는 컴퓨터 인지훈련 프로그램이 경도 치매노인의 인지기능, 우울, 생활만족도와 일상생활활동을 향상시키기 위해 활용 가능한 효과적인 프로그램임을 제시한다.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제18권2호
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• pp.145-153
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• 2007

Objectives: This study was focused on the influence of chronic aircraft noise exposure on children's continuous performance, intelligence and reading skill. Methods: We enrolled 586 children in 4-6th grade of 7 primary schools near air base in Korea. Continuous performance was measured using the computerized ADS program. We analyzed 477-512 children on the visual continuous performance test, auditory continuous performance test, intelligence test, and reading and the vocabulary test. Intelligence was measured using vocabulary, digit span, block design, and digit symbol tests of K-WISC-III. Results: The commission error and variability deviation of auditory continuous performance test and reading test were significantly higher among children in schools with the helicopter noise and the fighting plane noise compared to children in the low noised schools. Conclusion: There was a possibility that chronic aircraft noise exposure was associated with impairment of the school performance. The result of our study also shows chronic aircraft noise was associated with reading ability.

• 한국추진공학회지
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• 제18권6호
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• pp.59-67
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• 2014

1 N급 단일추진제 하이드라진 추력기 개발모델에 대한 인수수준 랜덤 진동시험과 장기수명 연소시험이 수행되었다. 랜덤 진동시험 결과로부터 1 N급 추력기 개발모델로 구성된 이중추력기모듈의 고유 진동수는 부품수준 요구조건(100 Hz)을 상회하였으며, 구조적으로 강건함을 확인하였다. 또한 20 kg 이상의 추진제가 사용된 장기수명 연소시험 결과 연속모드 추력 감소는 약 7% 이하, 추력 불안정 현상은 ${\pm}5%$ 이내로 나타났다. 컴퓨터단층촬영을 이용해 추력기 내부의 촉매를 촬영한 결과 촉매의 손실은 약 7% 이하로 추력기 개발모델의 설계가 적절함을 보여주었다.

• International Journal of Control, Automation, and Systems
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• 제3권4호
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• pp.564-570
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• 2005

This paper provides a basis for investigating 'The Origin of Artificial Species,' as a robot can be considered as an artificial creature. To design an artificial creature, its general internal architecture is presented and its artificial chromosomes are proposed as its essential components. Rity as an artificial creature is developed in a virtual world of PC to test the world's first robotic 'chromosomes,' which are a set of computerized DNA (Deoxyribonucleic acid) codes for creating robots (artificial creatures) that can have their own personality, and can ultimately reproduce their kind, or even evolve as a distinct species. The effectiveness of the artificial chromosomes is demonstrated by implanting the genetic code into two Ritys living in a virtual world, in order to define their personality.

• 한국정보교육학회:학술대회논문집
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• 한국정보교육학회 2007년도 하계학술대회
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• pp.135-140
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• 2007

지필검사는 매우 제한적인 학생정보만 제공한다. 그래서 온라인상에서 웹기반으로 실시하는 컴퓨터이용검사가 개발되고 시도되어지고 있다. 그러나 이러한 기존의 시스템은 문항을 자유롭게 이동하며 시험을 치를 수 없다는 단점을 가지고 있다. 이러한 단점으로 인하여 각 문항에 소요된 시간, 답안 변경 내역, 각 문항의 방문 횟수등과 같은 심화된 정보를 얻어낼 수 없다. 이러한 심화된 정보는 교육평가 영역에서 매우 중요시되는 정보이다. 심화된 정보를 알기 위해서는 응시자가 문항을 자유롭게 이동하면서 시험을 치를 수 있어야 한다. 그래서 본 논문에서는 기존의 시스템이 제공하는 기본 정보 이외에 심화된 정보를 얻을 수 있는 시스템을 개발하였다. 개발된 시스템을 67명의 학생들에게 지필검사와 함께 각각 적용하고 설문 조사를 실시하였다.