• Proceedings of the Korea Society for Industrial Systems Conference
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• 1998.03a
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• pp.93-98
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• 1998

본 논문에서는 양자화 결합 네트워크의 시계열 패턴의 기억 특성을 뉴로-칩 상에서 검토하기 위하여, 결합 하중이 $\pm$1 및 0로프로그램 가능한 네트워크를 설계하고 집적화 하였다. 제작된 칩 사이즈는 2.2mm $\times$2.2mm이며 1.2um CMOS 설계기술을 이용하여 7개의 뉴런과 49개의 시냅스 회로를 내장한다. 측정 결과, 설계된 네트워크는 동적 패턴을 성공적으로 기억한다. 또한, 특정한 리미트사이클을 네트워크에 기억시킬 수 있는 결합 하중의 구성방법을 제안한다. 이 방법은 간단한 결합하중과 정밀도의 관점에서 하드웨어 구성에 유용하다.

• Annual Conference on Human and Language Technology
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• 1991.10a
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• pp.209-218
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• 1991

작업 기억내에서의 통사처리과정을 살펴보기 위해 생략어를 포함하는 네가지 유형의 대등 연결문을 마지작 단어 읽기 과제를 통해 비교하였다. 특히 통사과정에 관한 설명으로 제시되는, 근접 가설, 작업 기억 가설, 최근 필러 이용 가설의 상대적 설명의 효율성을 검증하고자 하였다. 실험 결과는, 주어가 공통논항인, 표준 어순의 연결문이 다른 세 유형의 연결문보다 이해 시간이 빨랐다. 이 결과는 어느 한 가설로는 설명될 수 없으며, 대안적인 설명으로 작업 기억내에서 이용 가능한 여러 정보의 상호 제약에 의해 이루어짐을 논의 했다.

• Proceedings of the Korean Fiber Society Conference
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• 2001.10a
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• pp.195-198
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• 2001

최근 지능재료에 관한 연구가 형상기억합금, 반도체 재료, 의료용 재료, 고분자 재료 등에서 활발히 이루어지고 있다. 지능재료 중 형상기억재료는 형상기억, 형상고정, 충격흡수 등의 효과를 갖기 때문에 열적, 역학적, 전기적 및 자기적(magnetic) 자극을 감지함으로써 형상, 위치, 탄성계수, damping, 마찰 등의 특성변화를 통하여 응답을 할 수 있어 응용이 다양하다 형상기억고분자의 경우 가볍고 형상회복률이 높으며 가공성이 우수한 장점을 가지고 있다. (중략)

• Korean Journal of Cognitive Science
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• v.23 no.2
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• pp.225-248
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• 2012

The summed-similarity model of visual short-term recognition proposes that the estimated amount of summed similarity between remembered items and a recognition probe determines recognition judgement decision (Kahan & Sekuler, 2002). This study examined the effect of a task-irrelevant location change on the recognition decision against two remembered Gabor gratings differing in their spatial frequencies. On each trial in Experiment, participants reported if two gratings displayed across the visual fields are the same or not as the probe grating displayed after about a second of memory delay. The probe grating would be the same as or different from the memory items (lure) by 1 or 4 JND units. The location of the probe would also vary randomly across the left and right visual field with respect to the location of the corresponding memory item. The participants were instructed to perform their recognition task exclusively to the spatial frequencies of the memory items and the probe while ignoring the potential location change of the probe. The results showed that false-recognition rates of the lure probe increased as the summed similarity between the memory items and the probe increased. The rates also further increased in the condition where the probe location was different from the location of the corresponding memory item compared to the condition where the probe location was the same. The increased false-recognition rates indicate that information stored into visual short-term memory is represented as a form of well-bound visual features rather than independent features.

• Science of Emotion and Sensibility
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• v.21 no.3
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• pp.61-72
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• 2018

Items related to a crime that are known only to criminals and investigators can be used in the concealed information test (CIT) to assess whether the suspect is guilty of the offense. However, in many cases wherein the suspect is exposed to information about the crime, the CIT cannot be used. Although the perpetrator's memories about the details of the crime are episodic, the memories of a suspect who has inadvertently discovered the details of the crime are more likely to be semantic. The retrieval of episodic memories is associated with theta wave activity, whereas that of semantic memories is associated with alpha wave activity. Therefore, these aspects of memory retrieval can be useful in identifying the perpetrator of the crime. In this study, P300-based CITs were conducted in a guilty participant in a mock crime and an innocent participant who has been given information about the simulated offense. The results demonstrate that the difference in P300 amplitudes between the probe and the irrelevant stimulus did not differ between the guilty and innocent conditions. As expected, the lower theta band power (4-6 Hz) was higher in the probe than in the irrelevant stimulus in the guilty condition, but there was no difference in the innocent condition. Conversely, the upper alpha band power (8-10 Hz) was lower in the probe than in the irrelevant stimulus in the innocent condition, but there was no difference in the guilty condition. The possibility of using theta and alpha band powers in lie detection is discussed.

• Therapeutic Science for Rehabilitation
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• v.9 no.4
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• pp.95-106
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• 2020

Objective : The purpose of this study was to systematically review sex differences in episodic memory. Methods : We searched previous studies published in all electronic databases between 2010 and 2019. The key terms used in the search were 'sex differences' or 'gender differences' and 'episodic memory' or 'autobiographical memory'. 8 studies were finally extracted for analysis. Results : The 8 studies had evidence levels of II (67.5%) and III (37.5%), which are quite high. Healthy younger adults or healthy adults were recruited to examine sex differences in episodic memory. Assessment methods for episodic memory were mainly divided into cognitive tasks or standardized tests using visual or auditory stimuli. Subjects were instructed to memorize the stimuli and asked to recall them after some time. Overall females outperformed male. In particular, there were significant sex differences in verbal episodic memory. In contrast, there was no significant sex difference in visual episodic memory. Conclusion : To identify sex differences in episodic memory, a variety of test methods were used in various ways. Overall, females showed higher episodic memory than males. These findings suggest a need for cognitive intervention considering sex differences in the clinic. In the future, episodic memory tests with high ecological validity should be conducted to investigate sex differences in episodic memory.

• Sleep Medicine and Psychophysiology
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• v.3 no.1
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• pp.15-24
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• 1996

After rapid eye movement(REM) sleep was idenified in 1953, a lively interest developed concerning a possible role of this kind of sleep in memory processes. The author reviewed studies relating REM to memory/learning. Many studies in animals and humans gave substantial evidence for relating REM sleep to memory function. The evidence supporting the position taken in this paper comes from experiments showing that : (1) learning session is followed by the significant augmentation of REM sleep : (2) REM sleep deprivation, prior to learning or immediately thereafter, impairs the formation of a permanent memory/learning : (3) there is a vulnerable period of time(eg, REM sleep "window") following succussful learning, during which REM sleep deprivation results in memory impairment : (4) theta rhythm which develops during REM sleep induces long-term potentiation in hippocampus : (5) there are some evidences providing the relationship of neurotransmitter systems to the maintenance of REM sleep and memory storage processes.

• The Journal of the Convergence on Culture Technology
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• v.9 no.5
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• pp.133-140
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• 2023

The origin of texts we refer to as literary or artistic may be imagination, but many are based on experiences. In fact, experiences can be the source of artistic imagination since imagination often builds upon experiences. Therefore, the act of verbalizing human experiences using them as raw material can become a great form of art. Transforming past experiences into stories and infusing them with vitality inevitably requires a creative process of reconstruction, which is essentially a literary process. As such, 'Personal Narrative' holds significance as a literary process that weaves facts into stories and shapes them into forms. Individual experiences are stored as personal memories, and these 'personal memories' continuously generate stories. Collections of individual stories are stored as multiple memories, which gradually form 'collective memories' with distinct social and cultural inclinations through the passage of time and invisible yet potent societal and cultural censorship. The problem lies in the fact that individuals may tend to align their own memories with the inclinations of collective memory rather than simply recalling what they personally experienced. In the context of actual history, personal memories and collective memories communicate with each other, producing non-fictional content close to reality and sometimes manifesting as fiction content enriched with imagination. 'Personal Narrative' holds a significant genre as one genre of non-fiction content within our culture.

• Journal of the Korean Institute of Intelligent Systems
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• v.26 no.2
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• pp.147-152
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• 2016

Shape Memory Alloys (SMAs) undergo changes in shape and hardness when heated or cooled, and do so with great force. Since wire-type SMAs contract in length when heated and pull with a surprisingly large force and move silently, they can be used as actuactors which replace motors. These SMA actuators can be heated directly with electricity and can be used to create a wide range of motions. This paper presents the mechanical design and control for a three fingered, six degree-of-freedom robotic hand actuated by SMA actuators. Each finger has two joints and each joint is actuated with two tendons in the antagonistic manner. In order to create the sufficient force to make the smooth motion, the tendon is composed of two SMA actuators in parallel. For controlling the current to heat the SMA actuators, PWM drivers are used. In experiments, the antagonistic interaction of fingers are evaluated.

• Journal of Korea Game Society
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• v.18 no.2
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• pp.69-76
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• 2018

HMD makes big issues about virtual reality in these days. Experience of virtual reality may cause different effects with experience of real world, so this is the reason why comparison studies are needed. There are many works about usefulness of virtual reality education but most of studies were considered as special training. This study was started for the long term memory effect of virtual reality education game. Difference study of memory between real world education game and virtual reality education game shows virtual reality system has smaller diminution of memory than real world. And environment existence was defined as a main effect of long term memory through the test.