• Journal of Digital Convergence
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• v.16 no.7
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• pp.299-308
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• 2018

This study was conducted to examine the mediating effect of executive function deficiencies on the relationship between smartphone addiction and memory impairment and to suggest treatment implications for adults with smartphone addiction symptoms. For this study, 300 adults(146 males and 154 females) were conducted smartphone addiction scale, Barkley Deficits in Executive Functioning Scale-Short Form(BDEFS-SF), and Multifactorial Memory Questionnaire(MMQ). The results are as follows. First, correlation analyses showed that smartphone addiction, executive function deficiencies, and memory impairment were positively correlated. Second, Smartphone addiction group showed significantly higher scores on all of the subfactors of executive function and memory impairment. Third, Stepwise regression analyses revealed that self-organization/problem solving, self-management to time, self-restraint, and withdrawal were the best predictors of memory impairment. Forth, Executive function deficiencies fully mediated the relationship between smartphone addiction and memory impairment. These findings were considered to suggest that treatment programs for smartphone addiction group needed to include training for cognitive improvement such as executive function rehabilitation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.12
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• pp.7018-7024
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• 2014

This study examined the squared returns and absolute returns of KOSPI 200 with GPH (Geweke and Porter-Hudak, 1983) estimators. GPH was estimated by the long-term memory preserving time series parameter d in linear regression. This called the GPH estimator, which depends on a bandwidth m. m was decided by confirming the stable section of the point estimate by validating the track of the GPH estimator according to the value of m. The result suggests that by satisfying 0< d <0.5, the squared returns and absolute returns of KOPI 200 retains long-term memory.

• Journal of Oriental Neuropsychiatry
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• v.20 no.1
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• pp.75-87
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• 2009

목적 : 이 연구는 알쯔하이머 병에 대한 육미지황가미방의 효과를 조사하였다. 육미지황가미방은 산약, 산수유, 복령, 목단피, 구기자, 택사, 숙지황을 포함한 여러 가지 한약재의 전탕액으로 치매의 한약 치료제로 널리 사용되어 왔다. 방법 : 이 약물의 신경보호 작용을 조사하기 위해, 수중미로를 사용하여 학습과 기억에 대한 육미지황가미방의 효과를 평가 했고, 트리메틸틴은 강력한 유독물질로 선택적으로 중추신경계와 면역계의 세포를 파괴시킨다. 트리메틸틴(6.0 mg/kg, i.p.)주입 후, 쥐에게 육미지황가미방(400mg/kg, p.o.)를 2주 동안 날마다 복용시켰으며, 수중미로를 수행시켰다. 결과 : 육미지황가미방을 트리메틸틴에 노출시킨 쥐에 투약했으며, 그들은 수중미로에서 학습과 기억의 향상을 보였고, 이는 육미지황가미방이 어떠한 환경에서는 트리메틸틴으로 유발된 신경퇴화 후 중추신경계의 결손을 감소시킬 수 있음을 보여준다. 결론 : 이러한 결론은 육미지황가미방이 인지능력을 증가시키고, 트리메틸틴으로 유발된 신경퇴화에서 콜린 아세틸전환효소의 정도를 변화시킬 수 있음을 보여준다.

• The Transactions of the Korea Information Processing Society
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• v.3 no.6
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• pp.1407-1417
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• 1996

In recent researches on thread partitioning algorithms break a thread at the long latency operation and merge threads to get the longer threads under the given constraints. Due to this limitation, even a program with little parallelism is partitioned into small-sized threads and context-swithings occur frequently. In the paper, we propose another method array localization about the array name, dependence distance(the difference of accessed element index from loop index), and the element usage that indicates whether element is used or defined. Using this information we can allocate array elements to the node where the corresponding loop activation is executed. By array localization, remote accesses to array elements can be replaced with local accesses to localized array elements. As a resuit,the boundaries of some threads are removed, programs can be partitioned into the larger threads and the number of context switchings reduced.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06c
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• pp.456-458
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• 2012

운전 중 휴대전화의 사용은 교통사고 유발의 주요한 원인이며 운전자들은 운전 중 안전한 휴대전화 이용을 위해 핸즈프리, 블루투스 등의 다양한 방법을 이용해왔다. 하지만 이 방법들은 직접적인 접촉을 한번 이상 요구하기 때문에 이 과정에서 운전자의 주의 집중이 흐트러질 소지가 있다. 본 연구에서는 운전 중 안전한 스마트폰 사용을 위하여 전자기기에서 광범위하게 적용이 증가하고 있는 모션인식에 기반한 모션 디자인을 제안한다. 먼저 대상 모션을 선정하기 위하여 운전 중 발생할 가능성이 많은 모션을 정의하여 설문 조사를 시행하고, 설문 결과를 바탕으로 5 가지의 모션을 선정하였다. 다음으로, 선정된 모션에 대하여 모션과 그 모션의 동작 수행이 연관성을 가지도록 디자인하고, 이를 위한 기술적 고려 사항을 제시하였으며, 마지막으로 이들 모션에 대하여 사용자의 편의성과 기억의 용이성을 실험적으로 검증하였다. 실험 결과, 제시한 모션 디자인은 기억의 용이성 부분에서 적절한 결과를 보였으며 모션과 행위의 연계성과 편의성에 대하여도 긍정적인 평가를 이끌어냈다. 이러한 결과는 향후 구현되는 모션 디자인의 방향을 제시할 수 있으리라 기대된다.

• Therapeutic Science for Rehabilitation
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• v.4 no.2
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• pp.73-83
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• 2015

Objective: The purpose of this study was to examine the effect of the Spaced Retrieval Training (SRT) with Errorless learning on the elderly with Mild Cognitive Impairment (MCI)'s memory, Instrumental Activities Daily Living, Depression symptom. Methods: A single subject experimental research with ABA design was conducted in this study on the 78-years-old person who was enrolled in day-care center. The total experimental sessions were 16 which composed of 3 sessions for baseline, 10 sessions for intervention and 3 sessions for second baseline. K-Auditory Verbal Learning Test (K-AVLT) was measured for the memory each session. For the measurement of cognitive function, IADL, depression Symptom, Korean version of Montreal Cognitive Assessment (MoCA-K), Philadelphia Geriatric Center Instrumental Activities Daily Living (PGC IADL), Geriatric Depression Scale Korean Version (GDS-K) was measured at pre-post test. Results: Memory at the phase B was improved than Phase A. At the phase B, the scores trend was ascending, but after the intervention at the phase A', the scores trend was descending. The scores of MoCA-K were improved, PGC IADL were maintained, GDS-K were decreased. Conclusion: This results support the evidence of the SRT with EL on the elderly with MCI in the clinical setting. In the future, the correlation researches about MCI's memory and other functional factors will be needed for effective occupational therapy service.

• The Korean Journal of Archival Studies
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• no.53
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• pp.45-77
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• 2017

This study intends to rehabilitate the memories of the social other which have been gradually forgotten in the social events overloaded with the undemocratic violence in South Korea today. This study explores a case of Yongsan Tragedy in 2009 among the most tragic events. It notes the autonomous ways in which activist artists would like to memorize the socio-historical events anew despite the emptiness of public records. In other words, this study considers the Yongsan case to be significant that a group of the public, artists, grassroots activists, religion men got together in solidarity so as to create the contested narratives countering dominant memories and thus to signify the records written by the civil society. Among others, activist artists had documented the unofficial counter-memories of socially alienated peoples in terms of planning a series of artistic events such as opening some gallery exhibitions and performance events, issuing a volume of work books, comics and photographies, online broadcasting, and directing some documentaries. Especially, this paper tends to note the documentation of on-site activist artists to record the counter-memories against social oblivion. By doing so, it finally suggests how we could document the Yongsan Tragedy both to search out the archival implications of today's art activism and to insert those artistic records into the commonly shared counter-memories in a more inclusive way.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.26 no.1
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• pp.69-79
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• 2016

Biometric authentication is considered as being an efficient authentication method, since a user is not required to possess or memorize any other information other than biometrics. However, since biometric information is sensitive and could be permanently unavailable in case of revealing that information just once, it is essential to preserve privacy of biometrics. In addition, since noise is inherent in the user of biometric recognition technologies, the biometric authentication needs to handle the noise. Recently, biometric authentication protocols using fuzzy extractor have been actively researched, but the fuzzy extractor-based authentication has a problem that a user should memorize an additional information, called helper data, to deal with their noisy biometric information. In this paper, we propose a novel biometric authentication protocol using Hidden Vector Key Encapsulation Mechanism(HV-KEM) which is one of functional encryption schemes. A primary advantage of our protocol is that a user does not need to possess or memorize any additional information. We propose security requirements of HV-KEM necessary for constructing biometric authentication protocols, and analyze our proposed protocol in terms of correctness, security, and efficiency.

• Proceedings of the Korea Contents Association Conference
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• 2004.11a
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• pp.369-373
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• 2004

이동 가입자에 대한 효율적인 이동성 관리는 이동통신망에서 매우 중요한 역할을 한다. 본 논문에서는 이동기준 위치등록(MBR) 방식을 개선한 새로운 위치등록 방식을 제안한다. 기본 아이디어는 위치등록 수행 후 이동국의 이동경로를 내부 메모리에 기억하고 있다가 이동 가입자가 최근에 위치등록을 수행한 셀의 주변에서 이동하는 경우 불필요한 위치등록이 일어나지 않도록 하는 것이다. 제안한 방식의 분석은 이동기준 위치등록 방식과의 비교를 통하여 수행하였다. 분석 결과 제안한 방식은 이동기준 위치등록 방식에 비해 위치등록 회수가 작아서 그 성능이 우수함을 알 수 있었다.

• Science of Emotion and Sensibility
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• v.6 no.3
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• pp.21-28
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• 2003

This study investigated the differences in processing type of working memory between experts and novices when they read music scores. Two experiments were conducted with the articulatory suppression condition. In Experiment 1, eight half notes were shown on the screen for a brief period of time, participants were then requested to write the notes on a music sheet. the stimuli were divided into two: melodious and unmelodious. In similar fashion, Experiment 2 consisted of four-chord sequences, which contained three notes each. The stimuli were also divided into two: harmonious and disharmonious. As an analysis of the results in Experiment 1 & 2, novices commonly showed better performances in the non-articulatory suppression condition than the articulatory suppression condition with both stimuli types. However, experts were relatively affected little by the articulatory suppression with harmonious stimuli. These findings support that while novices entirely depend on the articulatory loop, experts may encode the notes through the visuo-spatial sketchpad before they transfer the information to the phonological store when they are familiar with material.