• Proceedings of the Korean Society of Computer Information Conference
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• 2012.01a
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• pp.135-138
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• 2012

본 연구는 다중참여역할수행게임(Massive Multiplayer Online Role Playing Game, 이하 MMORPG)이 자기주도 학습능력에 미치는 효과를 살펴보는데 목적이 있으며, 초등학교에 재학중인 4, 5, 6학년 3개 학급을 실험 대상으로 4주간 실험하였다. 실험집단은 방과 후 수업시간을 이용하여 일주일에 2시간 이상 MMORPG를 활용한 한자수업을 학습하도록 지도하였고, 통제집단은 교사의 수업 진행으로 학습하였다. 실험 전 두 집단 간의 자기주도 학습능력에 대한 동질성을 검증하기 위하여 자기주도 학습준비도 검사(Self-Directed Learning Readiness Scale, 이하 SDLRS)를 이용하여 자기주도 학습능력 사전검사를 실시하였고, 4주간 실험이 끝난 후 자기주도 학습능력 검사의 차이를 알아보았다. 더 나아가 하위요소인 효율적인 학습자라는 개념, 학습에 대한 솔선수범 및 독립성, 창의성, 자신의 학습에 대한 책임감, 기본학습 기능과 문제해결 기술, 미래 지향적인 자기이해 학습기회에 대한 개방성, 학습에 대한 애정과 열성을 다변량분산분석(MANOVA)를 실시하여 통계분석 하였다. 이러한 연구결과들을 바탕으로 다음과 같은 결론을 내릴 수 있다. 첫째, MMORPG를 활용한 한자학습과 일반교실 한자학습은 독립표본 t검정 결과 자기주도 학습능력에서 유의미한 차이가 나타났다. 즉, MMORPG를 활용한 한자학습이 일반교실수업에 의한 학습보다 높은 자기주도 학습능력 정도를 보여 주었다. 둘째, MMORPG를 활용한 한자학습이 하위요소 간에 어떠한 여향을 미치는가를 알아보기 위해 실시한 MANOVA 결과 효율적인 학습자라는 개념, 학습에 대한 솔선수범 및 독립성, 창의성, 자신의 학습에 대한 책임감, 기본학습 기능과 문제해결 기술, 미래 지향적인 자기이해에서는 유의미한 것으로 나왔지만 학습기회에 대한 개방성, 학습에 대한 애정과 열성에서는 유의미한 결과를 얻지 못하였다.

• Proceedings of the ESK Conference
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• 1997.10a
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• pp.277-285
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• 1997

본 연구에서는 운전 중에 빈번히 나타나는 부작업을 모의 운전 실험하에서 선정하여 그때의 운전 수행 도와 운전자의 심리적 작업부하에미치는 영향에 대해 연구하였다. 운전의 수행도는 브레이크 작동시의 시간의 적절성을 사용하였으며, 이를 측정하기 위해도로교통안전협회에 설치되어있는 운전기능검사기기를 사용하였다. 또한 운전자의 심리적 작업부하를 측정하기 위해 심리적 작업부하 측정 방법의 하나인 NASA- TLX를 사용하였다. 다양한 운전 상황을 설정하기 위해도로의 형태를 골목길과 일반도로로 나누었으며, 부작업의 종류는 전화 걸기, 라디오 조작, 대화로 선정하였다. 실험에는 17명의 피실험자가 참가하였고 결과에 대한 통계분석(SAS)이 이루어졌다. 본 연구 결과, 운전시 전화 걸기와 라디오 조작의 경우가 다른 부작업에 비해 운전 수행도를 통계적으로 유의한 정도 저하시키는 것이 조사되었다. 부작업에따라서 3 . approx. 22%의 수행도의 저하가 나타났으며, 42 .approx. 59%의 심리적 작업부하의 증가가 나타났다. 본 연구에서는 부작업이 정도의 차이는 있으나 수행도의 감소와 심리적 작업부하의 증가를 유발시키는 것이 정량적으로 입증되었다. 차후 보다 실제상황에 가가운 모의 실험과 다양한 수행도 측정지수를 사용한 연구 를 통해 운전시 부작업이 사고에 미치는 영향이 검증될 것으로 기대된다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.1
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• pp.312-320
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• 2013

This study was to examine usefulness of MoCA-K by comparing the correlation between LOTCA-G, MMSE-K and MoCA-K, regarding detecting elderly people's mild cognitive function in local community. The experiments in which the three different evaluation methods were employed, of this study were conducted on 50 elderly people. While the score of MoCA-K and MMSE-K was $22.72{\pm}5.85$ out of 30 and $25.08{\pm}3.78$ out of 30 respectively, the result of LOTCA-G was $96.28{\pm}6.82$ out of 104. Observing each result of the three cognitive function assessment tools towards general characteristics showed no significant differences in gender. However, they were at considerable variance with age and education level of the example group. As all the three results of the assessment methods showed high correlation, it is reasonable to believe that MoCA-K is an appropriate evaluation tool to assess the cognitive function of old people.

• The Journal of the Korea Contents Association
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• v.20 no.9
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• pp.520-530
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• 2020

The purpose of this study was to investigate the effects of occupation-based bilateral upper extremity training and transcranial direct current stimulation on upper limb function in stroke patients. The study group was divided into 13 experimental groups with occupation-based bilateral upper extremity training and transcranial direct current stimulation, and 13 controls with only occupation-based bilateral upper extremity training. A total of 4 weeks, 50 minutes, 5 times a week conducted, the patients were tested with Canadian Occupational Performance Measure(COPM), Accelerometer, Fugle-Meyer Assessment(FMA), and Motor Activity Log(MAL). As a result of the study, the experimental group and the control group showed significant improvement in both occupation satisfaction and performance, usage of the affected side and the tendon side, recovery of upper limb function, and quality of movement, In particular, the experimental group showed a significant difference in the amount of the affected side than the control group. Therefore, it was found that the combination of occupation-based bilateral upper extremity training and transcranial direct current stimulation had a positive effect on the recovery of upper limb function in stroke patients.

• Food Science of Animal Resources
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• v.23 no.2
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• pp.137-144
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• 2003

This study was carried out to investigate safety evaluation of IGEs separated and refined from bovine milk and commercial recombinant human IGFs. In order to evaluate toxicity of these samples, acute toxicity test and short term toxicity test were investigated with IGF-I separated and refined from colostrum and commercial recombinant human IGF-I from R&D systems company. for acute toxicity test, we selected recombinant human IGF-I from R&D systems company and establish one control group and three dose-level groups(0, 10, 20 and 50 $\mu\textrm{g}$ per rat). We have intravenously injected tail of rats with selected sample once. After 20 days, pathological cellular tissue analyses were investigated with liver, kidney and spleen of 12 rats in all test groups. However, Morbid tissue and abnormal statistical results were not discovered in all cellular tissues. For short term toxicity test, we selected IGF-I separated and refined from colostrum and establish one control group and three dose-level groups(0, 5, 10 and 15 $\mu\textrm{g}$/day per rat). Rats were orally injected with selected sample once a day during two weeks. After short term toxicity test period, Pathological cellular tissue analyses were investigate with liver, kidney and spleen of 12 rats in all test groups. However, Morbid tissue and abnormal statistical results were not discovered in all cellular tissues. These results suggest that IGF-I treated groups show no significant toxicological findings with changes of body weight, food consumption, water consumption, and pathological findings compared with control groups.

• Journal of the Korean Society for Nondestructive Testing
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• v.34 no.5
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• pp.390-396
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• 2014

A study on smart seats for railroad vehicles was conducted using piezoelectric (PZT) sensors. For this purpose, the concept of passenger friendly smart seats was defined, and a PZT sensor was selected as the optimum sensor based on this concept. Using PZT sensors, simulation tests were performed using a sub-scale model railroad vehicle. In these tests, the main functions of the smart seats were extracted and simplified to improve the effectiveness of the simulation tests. Based on the test results, the system for smart seats proposed in this paper was successfully verified using PZT sensors and the dedicated operation software for the system. This paper will contribute to the improvement of services in high-speed rail systems through advances in ticket checking tasks.

• Journal of the Korean Society of Food Science and Nutrition
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• v.38 no.9
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• pp.1131-1138
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• 2009

In this study, the breads with medicinal herbs (MH) composites showing cognitive function were prepared and their characteristics were examined. Fifteen kinds of medicinal herbs were extracted with hot water and divided into 3 groups (MH-1, MH-2, MH-3) based on their contents. All groups showed cognitive function in terms of promoting muscarinic receptor, NMDA receptor and acetylcholinesterase inhibition. In the preparation of breads containing MH extracts of various contents (0, 10, 20, 30, and 50%), there were no significant difference among loaf weight of all groups, but loaf volume of all groups were significantly (p<0.05) decreased with increasing content of MH extracts compared to the control group. The "a" and "b" values of bread crumb increased with the content of MH extracts while "L" value decreased, but these values of bread crust were similar to the control group. The most improvements in hardness, fracturability, cohesiveness, gumminess and chewiness of bread were noticed by the addition of 10$\sim$20% MH extracts, while adhesiveness and springiness of bread were the most by the 30% addition ones. Through the sensory evaluation, it was revealed that appearance, mouth feeling, taste, overall preference and crumb texture of bread were not significantly different (p<0.05) between control and those with the 10% addition ones. Therefore the 10% addition ones, which got similar scores to control, will make the most desirable product.

• Proceedings of the KIEE Conference
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• 1998.07g
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• pp.2433-2435
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• 1998

원자력발전소의 증기발생기는 기능상으로도 중요한 역할을 하지만 증기발생기 내의 전열관 손상이나 누설은 바로 방사능 누출의 원인이 되므로 원자력 발전소의 안전성 측면에서 보면 매우 중요한 설비이다. 따라서, 증기발생기 전열관은 정기보수시 마다 전열관 각각에 대해 비파괴검사의 일종인 와전류검사(Eddy Current Testing, ECT)를 통해 건전성을 평가하고 있다. 현재는 신호를 취득하고 평가하는 업무가 별개의 기관에서 수행하고 있으며 이를 위해 현장에 관련 인력과 장비가 이동되어야 한다. 그러나, 취득한 신호를 평가자가 on-line으로 받을 수 있고 그 결과를 이용하여 즉시 피드백이 가능하다면 평가기관의 인력은 현장에 있지 않더라도 평가가 가능하다. 그러므로, 원격 평가 환경을 구축한다는 것은 평가자가 굳이 현장에 가지 않더라도 지역에 상관없이 LAN을 활용하여 전국 어디서든 평가가 가능하도록 하고자 함에 있다.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.3 no.1
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• pp.26-45
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• 1992

This study presents the behavioral and cognitive changes by administration of methylphenidate(MPH) and imipramine(IMI) for the treatment of attention-deficit hyperactivity disorder(ADHD) in $5_{1/2}{\sim}12$ years old children referred to child psychiatric clinics. Behavioral changes are assessed with parent's and teacher's ratings. Drug effects on attention. short-term memory, and impulsivity are evaluated with psychological tests in laboratory. The changes were assessed twice in a 8-week periods. The data were analyzed seperately for 15 subjects each drug using repeated measured analysis of variance(ANOVA). The findings indicates that behavioral and cognitive impairments are improved by both drugs, but impulsivity is not. And MPH is superior to IMI on the improvement of attentional problem ; especially the findings indicates important differences between simple task and complex. perceptual-search task. These data confirm the effectiveness of MPH for treatment of ADHD, also raise questions regarding assessment method of attention and impulsivity as fell as importance of impulsivity in ADHD.

• Therapeutic Science for Rehabilitation
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• v.8 no.3
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• pp.43-55
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• 2019

Objective: The purpose of this study is to conduct a preliminary research for the development of a Performance-Based Cognitive Function Test (PCFT) to screen the elderly for cognitive function impairment, and examine the reliability and validity of the test. Methods: A draft version of the Performance-Based Cognitive Function Test (PCFT) was developed and utilized in nine healthy elderly individuals. In order to verify its reliability, we analyzed the internal consistency of the PCFT. In order to verify the concurrent validity of the PCFT, this study analyzed the correlation between motor-cognitive dual task assessments and the Korean version of the Mini-Mental State Examination (MMSE-K). Results: The internal consistency of the PCFT for motor and cognitive tasks was 0.871 and 0.959 (Cronbach's ${\alpha}$), respectively. Concurrent validity of the PCFT, which was performed through motor-cognitive dual task assessments, ranged from 0.755 to 0.964 (Spearman's rho statistic, p < 0.05). In addition, correlation between the cognitive assessment tool and the MMSE-K ranged from 0.849 to 0.943 (p < 0.01). Conclusion: This study verified, and established the reliability and validity of the PCFT. Further studies are required to examine other psychometric properties in a modified PCFT, for screening cognitive function impairments in the elderly.