• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.1389-1392
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• 2005

Ad-Hoc Network 기술은 차세대 네트워크로 부각되고 있으며 IETF (Internet Engineering Task Force) MANET (Mobile Ad-Hoc Network) 워킹그룹에서 표준화 작업이 이루어지고 있다. Ad-Hoc Network 에서 라우팅은 중요한 요소이다. 다양한 서비스를 제공하기 위해서는 잘 정의된 라우팅 기법이 필요하다. 본 논문에서는 기존에 연구되고 있는 Ad-Hoc 라우팅 프로토콜 중 (AODV, PAODV, TORA, DSR, DSDV) 프로토콜들을 NS 시뮬레이터를 이용하여 동작과 성능을 비교 분석하여, Ad-Hoc 라우팅 프로토콜 중 가장 적합한 라우팅 프로토콜을 제시한다.

• Sleep Medicine and Psychophysiology
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• v.5 no.2
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• pp.134-154
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• 1998

This paper first reviewed the definition, criteria, and neurological theories concerning the etiology of AD/HD, and the empirical studies dealing with the comorbidity of AD/HD with other psychiatric disorders. Secondly, results of studies using various neuropsychological tests for assessing the cognitive and behavioral problems in AD/HD children were examined, which suggest the possibility that dysfunction may exist in neural pathways involving many areas of the brain in AD/HD. However, because most of neuropsychological test used in Korea for ADHD children had been developed abroad, further study involving AD/HD, normal control, and other psychiatric control groups is needed to obtain developmental norms for interpreting the results, and to make more accurate diagnosis, and to clarify comorbidity of AD/HD with other disorders.

• Journal of the Korea Society of Computer and Information
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• v.11 no.1 s.39
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• pp.195-201
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• 2006

This thesis proposes hybrid routing protocol that mix proactive routing protocol and reactive routing protocol used in Ad hoc network. Proposed method is that establish special node offering network service of nods which construct Ad hoc network and do routing different from existing hybrid routing protocol, ZRP. Special node doing these parts is called C-node. Routing using C-node can accompany efficient routing by decreasing path institution time and flooding time than existing routing protocol.

• Proceedings of the IEEK Conference
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• 2003.11c
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• pp.269-272
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• 2003

Ad hoc 네트워크에 대한 상업적인 관심이 지속적으로 증가함에 따라, 최근 Ad hoc 네트워크에 QoS (Quality of Service)를 지원하기 위한 많은 연구가 이루어지고 있다. 지금까지의 연구는 대부분 QoS 기반 라우팅 프로토콜과 자원 예약 (resource reservation) 그리고 QoS MAC (Medium Access Control) 프로토콜에 관한 것이었다. Ad hoc 네트워크에 QoS를 제공하기 위해서는 위의 요소들이 상호 협력하여 동작하고 Ad hoc 네트워크의 특성이 충분히 고려된 005 모델에 관한 연구가 절실히 필요하다. 본 논문에서는 Ad hoc 네트워크에서 종단 사용자간 (end-to-end) 005를 제공하기 위한 서비스 모델의 설계와 구현방법에 대해 제안하였다.

• Korean Journal of Biological Psychiatry
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• v.17 no.4
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• pp.194-202
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• 2010

Alzheimer's disease(AD) is the most common neurodegenerative disorder and constitutes about two thirds of dementia. Despite a lot of effort to find drugs for AD worldwide, an efficient medicine that can cure AD has not come yet, which is due to the complicated pathogenic pathways and progressively degenerative properties of AD. In its early clinical phase, it is important to find the subtle alterations in synapses responsible for memory because symptoms of AD patients characteristically start with pure impairment of memory. Attempts to find the target synaptic proteins and their pathogenic pathways will be the most powerful alternative strategy for developing AD medicine. Here we review recent progress in deciphering the role of target synaptic proteins related to AD in hippocampal glutamatergic synapses.

• BMB Reports
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• v.42 no.8
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• pp.467-474
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• 2009

The modification of proteins by reversible phosphorylation is a key mechanism in the regulation of various physiological functions. Abnormal protein kinase or phosphatase activity can cause disease by altering the phosphorylation of critical proteins in normal cellular and disease processes. Alzheimer' disease (AD), typically occurring in the elderly, is an irreversible, progressive brain disorder characterized by memory loss and cognitive decline. Accumulating evidence suggests that protein kinase and phosphatase activity are altered in the brain tissue of AD patients. Tau is a highly recognized phosphoprotein that undergoes hyperphosphorylation to form neurofibrillary tangles, a neuropathlogical hallmark with amyloid plaques in AD brains. This study is a brief overview of the altered protein phosphorylation pathways found in AD. Understanding the molecular mechanisms by which the activities of protein kinases and phosphatases are altered as well as the phosphorylation events in AD can potentially reveal novel insights into the role aberrant phosphorylation plays in the pathogenesis of AD, providing support for protein phosphorylation as a potential treatment strategy for AD.

• Electronics and Telecommunications Trends
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• v.18 no.2 s.80
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• pp.11-24
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• 2003

이동 Ad Hoc 네트워크는 고정적이고 계층적인 인프라스트럭처 네트워크와는 비교되는, 이동 노드만으로 구성된 자율적이고 수평적인 네트워크이다. 이동 Ad Hoc 네트워크의 이동 노드는 중재자의 도움 없이 능동적인 연결 설정이 가능하고 네트워크의 참여 또는 이탈이 자유로우며 에너지원의 공급이 제한되어 빈번하게 네트워크의 토폴로지를 변화시킨다. 이러한 망의 특성상 이동 Ad Hoc 네트워크 기술은 하위 계층의 전파 전파, 전파 간섭 및 전력 제어에서부터 링크 계층의 다중 접속 및 자원 할당, 네트워크 계층의 라우팅, 트랜스포트 계층의 연결 설정 및 유지, 그리고 보안 및 상위 계층 애플리케이션에 이르기까지 다양한 기술적 해결 요구사항을 갖는다. 본 고에서는 이러한 Ad Hoc 네트워크의 특징과 특성을 살펴보고 관련 주요 요소 기술과 과거부터 현재까지 이동 Ad Hoc 네트워크 기술 분야에서 진행되어온 연구동향을 살펴본다.

• Journal of the Korean Graphic Arts Communication Society
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• v.30 no.2
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• pp.13-22
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• 2012

This research attempts to analyze communication effects of print ad having pictorial typography. 150 Questionnaires were distributed to respondents staying Daejeun City and 148 copies were retreated for five days from April 22nd to 26th, 2012. Frequency analysis, factor analysis, Cronbach's alpha for reliability analysis were utilized for data analysis with SPSS 12.0. For testing hypothesis, regression analysis was used. As result of testing hypothesis, 'informative, beneficial, creative, reliable' were partially significant to attitude towards print ad having pictorial typography. That means 'creative' and 'reliable' were insignificant, while 'informative' and 'beneficial' are significant. Variable of the most influencing on attitude towards advertising is 'informative.' 'Informative, beneficial, creative, and reliable' were partially significant to brand attitude, too. That means 'beneficial' and 'creative' were insignificant, while 'informative' and 'reliable' were significant. Variable of the most influencing on brand attitude was 'reliable.' Therefore, to enhance communication effect of print ad having pictorial typography, 'informative' and 'reliable' are most significant variables.

• Journal of the Korean Graphic Arts Communication Society
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• v.30 no.2
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• pp.69-78
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• 2012

This research attempts to analyze how attributes of ad model influence on brand familiarity, personality, and preference among consumers. Attributes of ad model was classified into three; attractiveness, professionalism, and reliability. One hundred of consumers who lived in Daejeun City were selected as respondents for this research. The result of hypothesis I showed that attributes of ad model significantly influenced on brand familiarity. it was the result of hypothesis II that both Attractiveness and professionalism of ad model affected brand personality. It was also found that attractiveness and professionalism are significantly brand preference from the result of hypothesis III. In conclusion, findings showed that attractiveness of ad model mostly influenced on brand familiarity, personality, preference.

• Journal of Korea Society of Industrial Information Systems
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• v.13 no.1
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• pp.68-75
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• 2008

Because ad hoc network is vulnerable to attacks such as routing disruption and resource consumption, it is in need of routing protocol security. In this paper, we propose an efficient and secure route discovery protocol for ad hoc network using symmetric key cryptography. This protocol has small computation loads at each hop using symmetric key cryptography. In the Route Reply, encryption/decrytion are used to guard against active attackers disguising a hop on the network.