• The Journal of Korean Physical Therapy
• /
• 제26권4호
• /
• pp.234-239
• /
• 2014

Purpose: The purpose of this study is to use P300 latency to determine whether methods of motor learning in terms of massed and distributed practice can affect motor sequential learning in healthy adults. Methods: Twenty-four healthy subjects participated in this study. They were randomly allocated into three groups: a 10 minute, a 12 hour, and a 24 hour group. In the SRT task, eight numbers were adopted as auditory stimuli. During an experiment, participants were instructed to press the matching key as quickly and accurately as possible when one of the eight numbers was presented randomly. The subjects practiced for three sessions, each of which comprised five blocks of 40 serial reaction time tasks. While they practiced during these three sessions, P300 latency was measured. The data were analyzed using ANCOVA. Results: The P300 latency of Fz, Cz, and Pz decreased in all groups except for the Fz area of the 10 min group. Overall, the P300 latency of the 10 min group showed a smaller decrease compared with the 12 hr and 24 hr groups. Statistically, no significant differences in the Fz and Cz areas were observed among the three groups. The P300 latency in the Pz area of the 10 min group showed a significantly smaller decrease compared with the other groups. Conclusion: These findings suggest that short-term sequential motor training can alter brain functions such as the P300 latency. We also found that better acquisition of a motor skill was obtained with distributed practice of a task than with massed practice.

• 한국약용작물학회지
• /
• 제22권1호
• /
• pp.46-52
• /
• 2014

In traditional Korean and Chinese medicine, safflower (Carthamus tinctorius L.) for the treatment of central nervous system-related symptoms such as tremor, seizure, stroke and epilepsy. We investigated the effects of safflower could influence cerebral ischemia-induced neuronal and cognitive impairments. Administration of safflower for 1 day (200 mg/kg body weight, p.o.) increased the survival of hippocampal CA1 pyramidal neurons after transient global brain ischemia. And neurological functions measured as short term memory. Post-treatment with safflower for 2 times decreased the induction/reduction - induced production of neuronal cell loss from global cerebral ischemia. Safflower markedly decreased neuronal cell death and also caused a decrease in the content of thiobarbituric acid-reacting substances (TBARS) ($55.2{\pm}9.4{\mu}mol\;mg^{-1}$) and significant improvement of activities of glutathione (GSH) ($27.2{\pm}5.0{\mu}mol\;mg^{-1}$) in hippocampus. We conclude that treatment with safflower attenuated learning and memory deficits, and neuronal cell loss induced by global cerebral ischemia. These results suggest that safflower may be a potential candidate for the treatment of vascular dementia.

• 지역연구
• /
• 제15권1호
• /
• pp.75-92
• /
• 1999

In this study, the present state of fiscal crisis for local governments after IMF is analyzed, firstly. its implications Characteristics of structural reform of finance after IMF bailout in Korea are examined, secondly. Since Korea was shocked by the currency crisis at the end of 1997, its local governments have also faced fiscal difficulties. The Depression of national and local economies led to decreases in tax revenues of local governments. And these shrunken revenues led to their expenditure cuts. Many investment plans were curtailed, and ordinary expenditures were also reduced sharply. The negative influences of the currency crisis on local government's finances can be examined in terms of fiscal revenue, fiscal spending, and debt burden. As a result many local governments are now experiencing fiscal stress, and some of them are even faced with fiscal crisis although the possibility of extreme measures, such as moratoriums or bankruptcies, is very slim. This is due in part to the weight of debt in local governments' budgets having remained small since the debt of local governments has been controlled by the central government. Another reason is that, central government, which functions as a lender of last resort for the local governments, will pay the debt for them. Also, without a legal system which stipulates the adjudication of bankruptcy for municipalities in Korea, local Korean governments have no legal right to declare bankruptcy. Although not a single municipality has fallen into insolvency, yet, this trend will continue to deepen as the recession continues and may lead to a situation where manu local governments fall into virtual bankruptcy in the near future, and its effects on society, as a whole, will be serious. Therefore, measures to prevent and overcome such an extreme situation are necessary, but both short-and long-term policies should be to cope with the current fiscal crisis and to prevent the deepening of the current situation.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제8권12호
• /
• pp.4467-4488
• /
• 2014

The bibliometric analysis is widely used for understanding research domains, trends, and knowledge structures in a particular field. The analysis has majorly been used in the field of information science, and it is currently applied to other academic fields. This paper describes the analysis of academic literatures for classifying research domains and for suggesting empty research areas in the telecommunications policy. The application software is developed for retrieving Thomson Reuters' Web of Knowledge (WoK) data via web services. It also used for conducting text mining analysis from contents and citations of publications. We used three text mining techniques: the Keyword Extraction Algorithm (KEA) analysis, the co-occurrence analysis, and the citation analysis. Also, R software is used for visualizing the term frequencies and the co-occurrence network among publications. We found that policies related to social communication services, the distribution of telecommunications infrastructures, and more practical and data-driven analysis researches are conducted in a recent decade. The citation analysis results presented that the publications are generally received citations, but most of them did not receive high citations in the telecommunications policy. However, although recent publications did not receive high citations, the productivity of papers in terms of citations was increased in recent ten years compared to the researches before 2004. Also, the distribution methods of infrastructures, and the inequity and gap appeared as topics in important references. We proposed the necessity of new research domains since the analysis results implies that the decrease of political approaches for technical problems is an issue in past researches. Also, insufficient researches on policies for new technologies exist in the field of telecommunications. This research is significant in regard to the first bibliometric analysis with abstracts and citation data in telecommunications as well as the development of software which has functions of web services and text mining techniques. Further research will be conducted with Big Data techniques and more text mining techniques.

• 보건행정학회지
• /
• 제30권2호
• /
• pp.164-177
• /
• 2020

This study aims to compare the experience of selected countries in operating separate payment system for new healthcare technology and to find implications for price setting in Korea. We analyzed the related reports, papers, laws, regulations, and related agencies' online materials from five selected countries including the United States, Japan, Taiwan, Germany, and France. Each country has its own additional payment system for new technologies: transitional pass-through payment and new technology ambulatory payment classification for outpatient care and new technology add-on payment for inpatient care (USA), an extra payment for materials with new functions or new treatment (C1, C2; Japan), an additional payment system for new special treatment materials (Taiwan), a short-term extra funding for new diagnosis and treatment (NUB; Germany), and list of additional payments for new medical devices (France). The technology should be proven safe and effective in order to get approval for an additional payment. The price is determined by considering the actual cost of providing the technology and the cost of existing similar technologies listed in the benefits package. The revision cycle of the additional payment is 1 to 4 years. The cost or usage is monitored during that period and then integrated into the existing fee schedule or removed from the list. We conclude that it is important to set the explicit criteria to select services eligible for additional payment, to collect and analyze data to assess eligibility and to set the payment, to monitor the usage or cost, and to make follow-up measures in price setting for new health technologies in Korea.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• 제38권2호
• /
• pp.116-120
• /
• 2012

The buccal fat pad is specialized fat tissue located anterior to the masseter muscle and deep to the buccinator muscle. Possessing a central body and four processes it provides separation allowing gliding motion between muscles, protects the neurovascular bundles from injuries, and maintains facial convexity. Because of its many advantageous functions, the use of the buccal fat pad during oral and maxillofacial procedures is promoted for the reconstruction of defects secondary to tumor resection, and those defects resulting from oroantral fistula caused by dento-alveolar surgery or trauma. We used the pedicled buccal fat pad in the reconstruction of intraoral defects such as oroantral fistula, maxillary posterior bone loss, or defects resulting from tumor resection. Epithelization of the fat tissue began 1 week after the surgery and demonstrated stable healing without complications over a long-term period. Thus, we highly recommend the use of this procedure.

• Asian-Australasian Journal of Animal Sciences
• /
• 제31권8호
• /
• pp.1110-1118
• /
• 2018

Objective: This study was intended to identify genes positively selected in Thoroughbred horses (THBs) that potentially contribute to their running performances. Methods: The genomes of THB and Jeju horses (JH, Korean native horse) were compared to identify genes positively selected in THB. We performed cross-population extended haplotype homozygosity (XP-EHH) and cross-population composite likelihood ratio test (XP-CLR) statistical methods for our analysis using whole genome resequencing data of 14 THB and 6 JH. Results: We identified 98 (XP-EHH) and 200 (XP-CLR) genes that are under positive selection in THB. Gene enrichment analysis identified 72 gene ontology biological process (GO BP) terms. The genes and GO BP terms explained some of THB's characteristics such as immunity, energy metabolism and eye size and function related to running performances. GO BP terms that play key roles in several cell signaling mechanisms, which affected ocular size and visual functions were identified. GO BP term Eye photoreceptor cell differentiation is among the terms annotated presumed to affect eye size. Conclusion: Our analysis revealed some positively selected candidate genes in THB related to their racing performances. The genes detected are related to the immunity, ocular size and function, and energy metabolism.

• 한국기록관리학회지
• /
• 제17권2호
• /
• pp.27-56
• /
• 2017

웹을 통해 유통되는 다양한 기록정보의 보존에 대한 필요성과 중요성은 점점 더 증대되고 있다. 전통적인 유형의 기록물뿐만 아니라 웹을 통해 생산되는 각종 소통의 기록들은 하나의 기억에 대한 다양한 관점을 보여주는 것이며, 특히 그 중에서도 재난에 대한 웹 기록물들은 미래의 세대를 위해서도 반드시 장기적으로 보존되어야 할 가치가 있는 자료이다. 국립중앙도서관에서 구축하고 관리하는 웹 아카이빙 서비스인 OASIS를 통해 제공되는 재난아카이브는 최근 국내에서 일어났던 재난 사건들에 대해 생산된 웹정보자원들을 수집하고 보존하기 위해 구성되었다. 본 연구에서는 OASIS 재난아카이브의 특성과 콘텐츠 현황 및 문제점 등을 살펴보고, 이를 통해 재난에 대한 웹기록물 아카이빙의 발전을 위한 과제를 모색해보고자 한다.

• 한국방재학회 논문집
• /
• 제7권3호
• /
• pp.69-78
• /
• 2007

본 연구에서는 홍수가 범람하였을 때 제내지에서 발생하는 동역학적 거동을 정확히 모의하기 위해, 시간에 따른 제방붕괴 양상을 고려하여 제방붕괴시 제내지로 유입되는 월류량을 정확하게 산정하였다. 2차원 비선형 천수방정식을 지배방정식으로 사용하였으며, 비구조적 격자계가 적용된 유한체적법을 이용하여 제방붕괴를 모의하였다. 제방붕괴시 발생하는 충격파 흐름을 해석하기 위하여 HLLC approximate Rimann solver를 사용하였고, 수치진동을 제어하기 위해 TVD 제한자를 사용하는 WAF(Weighted Averaged Flux) 기법을 사용하였다. 또한 생성항은 연산자 분리기법을 이용하여 비 물리적인 결과가 나오지 않도록 하였다. 먼저 본 모형을 댐붕괴 문제에 적용하여 댐 붕괴시 발생하는 자유수면 변위를 계산하였으며, 경사식 방파제의 월류량을 산정하여 기존 실험결과와 비교 검증하였다. 그 결과 충격파를 잘 모의하고 있었으며, 월류량 또한 기존 실험결과와 일치하였다. 또한 제방 붕괴시 발생하는 흐름에 대해 높이와 폭을 각각 시간에 따른 함수로 가정하여 적용하였다. 제방붕괴 유형에 따른 월류량을 각각 비교한 결과, 제방이 갑작스럽게 붕괴된 경우에서의 월류량이 점진적으로 붕괴되는 조건에서의 월류량보다 크게 산정됨을 알 수 있었다.

• 한국산림과학회지
• /
• 제104권2호
• /
• pp.300-308
• /
• 2015

국내에서는 2007년 경관계획제도가 시작되었다. 산림관리의 장기성과 광범위성을 생각하면 산림경관 관리의 계획적 접근은 필수불가결한 일이나 산림경관계획은 거의 수립되지 못하고 있다. 계획 수립에 필요한 식견의 부족도 하나의 원인으로 판단된다. 산림의 특성이 최대한 발휘될 수 있는 계획 수립을 위해 산림경관요소의 도출과 산림경관계획 작성 시 고려해야 할 사항을 제안하였다. 산림경관요소(산림경관유형)는 4개의 중분류(지형자원, 수자원, 식생자원, 인문자원)와 12개의 소분류(지형자원:능선 파노라마, 기암봉우리와 암릉, 수자원:폭포, 계곡과 계류, 호수와 도경, 식생자원:수관층 풍경, 주능선의 철쭉, 능선사면의 단풍, 초본군락의 꽃밭, 임내풍경, 숲길풍경, 인문자원:시설물)로 구성되었다. 산림경관계획 작성 시 제안사항으로 유형별 계획 단계의 경관권역계획 작성 시 산림의 6개 기능의 검토 필요성과 요소별 계획단계에서는 주능선, 계절감, 산림수변, 암석자원 경관관리계획 수립 필요성을 제안하였다.