• 한국HCI학회:학술대회논문집
• /
• 2008.02b
• /
• pp.507-512
• /
• 2008

This study investigated the navigation ability of patients with MCI in Virtual Environments(VE) and on the visual functioning. The participants consisted of elderly adults with/without MCI. Neuropsychological tests(RCFT, BVRT, TMT, and Digit Span), the Groton Maze Learning Test(12trials), and the VE navigation learning task(6 trials) were performed. As a result, there were significant group differences for the RCFT and BVRT, but not for the GMLT. For the VE task, there was a significant difference between the MCI and normal group and no interactions between the groups and trials were found. The VE task was correlated with The RCFT, the BVRT, and the GMLT and omnibus the RCFT and the BVRT accounted for 45% of VE performances. Thus, we concluded that patients with MCI are inferior to VE navigation and visual retention/memory play a role in navigation abilities.

• Communications of Mathematical Education
• /
• v.10
• /
• pp.417-440
• /
• 2000

"여성은 수학을 못한다" 또는 "수학적 능력에 있어서 남학생이 여학생보다 우월하다"는 우리 사회의 일반적 통념은 근거가 있는 것인가? 1970년대 이후 구미를 중심으로 외국에서는 교육에서의 성 평등(equity) 문제에 대한 관심이 높아지면서 수학에서의 성별차이(gender difference)에 대한 연구들이 상당히 이루어져 왔다. 그러나 국내의 연구는 한국학술진흥재단의 연구지원을 반아서 수행된 96년부터 98년까지의 3년 연구(권오남, 박경미, 임형, 허라금의 공동연구) 이외에는 거의 전무하다. 이 글에서는 수학적 능력에서의 성별차이라는 논제를 3년 연구의 결과를 중심으로 양적, 질적 연구방법으로 접근하며, 이를 바탕으로 수학교육에서의 양성평등의 과제와 전망을 논의한다.

• Journal of Biomedical Engineering Research
• /
• v.24 no.4
• /
• pp.267-273
• /
• 2003

The present study attempted to observe what changes the supply of highly concentrated (30%) oxygen cause to people's ability of visuospatial cognition, compared to air of normal oxygen concentration (21%). This study sampled eight male university students (the average age : 23.5) as subjects for functional Magnetic Resonance Imaging (MRI) study It also developed equipment that supplies 21% and 30% oxygen) at a constant rate of 8L/min. Two questionnaires containing 20 questions were developed to measure the ability of visuospatial cognition, and accuracy was calculated from the result of task performance. The experiment paradigm consisted of the run conducting tasks at 30%'s concentration of oxygen and another run at 21%'s concentration of oxygen. Each run was composed of four blocks and each block included eight control tasks and five visuospatial taks. 3T MRI was used and fMRI was obtained through the single-shot EPI method. The activation in the occipital-associated area, bilateral superior parietal lobes, bilateral inferior parietal lobes. bilateral precuneus, bilateral postcentral gyri, bilateral middle frontal gyri, bilateral inferior frontal gyri, bilateral medial frontal gyri, bilateral superior frontal gyri, bilateral cingulate gyri was significantly increased at the 30%'s concentration of oxygen rather than 21%'s. Furthermore, the result of task performance showed the accuracy increased at 30%'s concentration of oxygen rather than 21%'s. From the result of this study, it is concluded that the supply of highly concentrated oxygen has a positive effect on the ability of visuospatial cognition.

• Korean Journal of Cognitive Science
• /
• v.16 no.3
• /
• pp.189-197
• /
• 2005

In this study, changes in performance of 2-back task, blood oxygen saturation and heart rate due to $40\%$ concentration oxygen supply were observed. Five male $(25.8\pm1.3)$ and five female $(23.0\pm1.0)$ college students were nked to perform 2-bark task during two types of oxygen (concentration $21\%,\;40\%$) administration. The experimental sequence consisted of Rest1(1 min.), 0-back Task (1 min.), 2-bark Task (2 min.), and Rest2 (4 min.) and the physiological signals such as blood oxygen saturation and heart rate were measured throughout the stages. The experimental result showed that the performance increased significantly at $40\%'s$ concentration of oxygen rather than $21\%'s$, which shows oxygen supply has positive influence on cognitive performance. When $40\%$ concentration oxygen is supplied, the oxygen saturation in the blood increased and heart rate was decreased significantly comparing to $21\%$. It is Suggested that $40\%$ oxygen can stimulate brain activation bY increasing actual blood oxygen concentration in the process of cognitive performance, and hyperoxia makes heart rate decrease.

• Journal of the Korean Society for Library and Information Science
• /
• v.47 no.3
• /
• pp.97-117
• /
• 2013

This study aimed to explore group members' collaborative information by analyzing the number and the content of text contributions on the online discussion board in the group-based research project. This study explored graduate students' collaborative information behavior, affective approach, and types of collaboration and support needed in the group-based research project based on Kuhlthau's Information Search Process(ISP) Model and Yue and He's Collaborative Information Behavior(CIB) Model. It is expected that the results of this study will be useful for understanding of CIB in the group-based research project and applying information literacy instruction to information user in collaboration.

• Proceedings of the KAIS Fall Conference
• /
• 2010.05b
• /
• pp.735-738
• /
• 2010

본 연구는 관절가동범위 및 근력강화운동, 반복적인 과제-지향적 활동으로 구성된 복합운동프로그램을 뇌졸중 환자에게 2년 4개월 동안 적용하여 상지 기능 및 균형 능력에 미치는 효과를 알아보고자 하였다. 연구대상자는 뇌졸중으로 인한 좌측 편마비 증상을 보이는 68세 여성으로 매 회기 1시간씩, 주 3회, 2년 4개월 동안 복합운동프로그램을 수행하였다. 대상자의 상지 기능은 브론스트롬의 손 회복 단계와 상지 회복단계, Fugl-Meyer Assessment of Motor Function, 뇌졸중 상지기능검사로, 균형 능력은 Tinetti Gait & Balance Scale로 평가하였다. 연구 결과 대상자의 상지 기능과 균형 능력이 유지 및 향상 되었다. 이를 통하여 만성 뇌졸중 환자에서 상지 및 균형 능력의 유지 및 증진을 위한 지속적인 복합 운동프로그램 수행의 유효성을 확인할 수 있었다.

• Defense and Technology
• /
• no.9 s.151
• /
• pp.48-55
• /
• 1991

현대 해군 전략상 적국의 해상 수송 수단의 파괴 또는 봉쇄와 자국 해상교통로의 확보는 전쟁 지속능력의 확보 및 봉쇄여부와 직결되는 매우 중요한 과제로 대두되어 왔다 또한 이러한 해상 통제작전을 수행하는데 가장 값싸고 효율적인 전략병기로서 기뢰의 중요성은 점차 증대되어 왔다 최근의 주요 전술적 발전추세는 부설 심도의 증가, 운용범위의 확대, 탐지파괴범위의 확대, MCCM 능력 강화전술운용 준비태세 향상에 있다

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2004.05a
• /
• pp.300-300
• /
• 2004

본 연구에서는 언어과제 수행 시 일반 공기 중의 산소 농도 (21%) 환경에 비해 외부에서 고 농도 (30%)의 산소 공급이 혈중 산소 포화도(SPO$_2$), 심박동율(Heart Rate), 정답률(Accuracy), 반응속도(Reaction Time)에 어떠한 영향을 미치는지를 검증하고자 한다. 30%와 21%의 산소를 8L/min의 양으로 일정하게 공급할 수 있는 산소 공급 장치를 이용하였고, 10명의 대학생(오른손잡이, 평균나이 23.4세)을 대상으로 실험을 수행하였다. 난이도가 비슷한 두 가지 언어과제를 28문제씩 피험자에게 풀게하여 정답률과 반응속도를 계산하였다.(중략)

• Therapeutic Science for Rehabilitation
• /
• v.3 no.1
• /
• pp.67-77
• /
• 2014

Objective : The purpose of this study was to examine task-oriented training affects on instrumental activity of daily living for elderly with dementia. Methods : The participant is a 75 years old female with dementia. The intervention was performed for 45 minute on 3 times per week over 1 month. Independent variable was task-oriented training and dependent variable were memory(DST), executive function(TMT-A, CDT), changing of IADL(AMPS). Results : The results showed that the participant significantly improved in executive function, performance of IADL. However, the participant did not show significant improvement in memory. Conclusion : In conclusion, the findings of this study indicate that task-oriented training is positive effect on performance of IADL in dementia.

• Science of Emotion and Sensibility
• /
• v.21 no.2
• /
• pp.29-42
• /
• 2018

As information technology is more actively incorporated into automobiles, the role of IVIS (In-Vehicle Infotainment System) is becoming increasingly important for providing convenience and entertainment for drivers. However, using the infotainment systems while driving requires task switching and attending to two visual resources simultaneously. We simulated a setting where participants have to drive while interacting with the infotainment system and examined how task difficulty and motor cues impact driver task-switching and driving performance, specifically whether the effects of motor cues differ depending on task difficulty. For the infotainment display, we used two types of number array depending on the congruency between the digit repetition and the chunking unit, while task difficulty was manipulated by the size of the touch-keys. Participants were instructed to dial two numbers on the screen while we recorded the dialing time, lateral position, inter-key press intervals, and steering wheel control. We found that dialing time and lateral position were affected by task difficulty, while the type of number array had no effect. However, the inter-key press intervals between chunked numbers and steering wheel movement both increased when participants had to use an incongruent number array, which indicates that, if number digits are repeated, chunking is ignored by the drivers. Our findings indicate that, in a dual-task condition, motor cues offset the effect of chunking and can effectively signal the timing for task switching.