• 발명특허
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• v.34 no.10
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• pp.46-48
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• 2009

• 발명특허
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• v.35 no.2
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• pp.28-32
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• 2010

• Journal of IKEEE
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• v.10 no.1 s.18
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• pp.75-86
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• 2006

The MANET that can make autonomous distributed Network with Routing function has many differences than past wireless communication. For upcoming ALL-IP environment, MANET device should be connected with wired Internet Network and MANET is required to have a gateway to bridge two different networks to share information from any place. In this paper, Using the GMAHN Algorithm proposed Proactive, Reactive, Hybrid method that provides Inteface between Wired Internet network and MANET, we learned each method's the advantage and disadvantage through the various network environments. And also, we presented the optimization method of Hybrid combined Proactive with Reactive.

• The KIPS Transactions:PartC
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• v.15C no.4
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• pp.245-252
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• 2008

An emergency service over Voice over IP (VoIP) network is an essential condition, like the existing telecommunication services. To support for the emergency services, standardization works have been performed. The National Emergency Number Association (NENA) has been developing the framework and procedures for an emergency service for Non-IP based network, rather than protocols. In contrast, the Internet Engineering Task Force (IETF) has been only focused on end-to-end IP-based emergency calls. The NENA architecture is incompatible with the IETF protocols. To solve the problem, we design and implement a SIP-based VoIP emergency system by adopting the NENA architecture and by applying IETF protocols, for both IP-based Pubic Safety Answering Point (PSAP) and PSTN-based PSAP. It is implemented and tested under UNIX environment.

• Journal of Internet Computing and Services
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• v.10 no.6
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• pp.27-36
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• 2009

PSTN (public switched telephone network) provides voice communication service, whereas IP network provides data oriented service, and we can use IP network for multimedia transport service (e.g. voice over IP service) with economic price. In this paper, we propose RoIP (robot on IP) service scenario, signaling call flow, and implementation to provide home automation and monitoring service for remote site users. In our scheme, we used a extended SIP (session initiation protocol) for signaling protocol between remote site users and home robots. For our bearer transport control, we implemented H.263 video codec over RTP (real-time transport protocol) and additionally DTMF (dual tone multi-frequency) transport for robot actuator control. We implemented our scheme on home robots and experimented with KTF operator network, and it shows good communication quality (average MOS = 9.15) and flexible robot controls.

• Journal of Radiation Protection and Research
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• v.29 no.4
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• pp.231-236
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• 2004

An imaging plate(IP) detector, a two-dimensional digital radiation detector that can acquire image of radioactivity distribution in a sample, has been applied in many fields; for industrial radiography, medical diagnosis, X-ray diffraction test, etc. In this study, the possibility of IP detector to be used lot measuring radioactivity of sample is explored using its high sensitivity, higher spatial resolution, wider dynamic range and screen uniformity for several kinds radiations. First, the IP detector is applied to measure the surface uniformity for area source. Surface uniformity is measured rapidly and nondestructively by measuring the radioactivity distribution of common standard area source$(^{241}Am)$. Next, the IP is employed to study the possibility of measuring an extremely low-level activity of environmental sample. For this study the screen uniformity, shield effect of background radiation, linear dynamic range and fading effect of the IP detector is investigated. The potato, banana, radish and carrot samples are chosen to measure ultra low-level activity of $^{40}K$ isotope. The efficiency calibration of IP detector is carried out using the standard source.

• Korean Journal of Pharmacognosy
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• v.42 no.4
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• pp.289-292
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• 2011

Korean folk medicine 'SaCheolNaMuIp' has been used to cure jaundice. The botanical origin of the crude drug has been no pharmacognostical confirmation on it. To clarify the botanical origin of 'SaCheolNaMuIp', the morphological and anatomical characteristics of the leaves of Euonymus species growing in Korea, i.e. E. japonica and E. fortunei var. radicans were studied. As a result, it was clarifyed that SaCheolNaMuIp was the leaf of Euonymus japonica.

• Korean Journal of Pharmacognosy
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• v.41 no.4
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• pp.233-237
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• 2010

The crude drug 'CheonKun' is derived from the underground portions of Rubia species. However, the aerial parts of the plants are also sold under the 'GgogDuSeoNiIp' in Korea. To clarify the botanical origin of 'GgogDuSeoNiIp' the morphological and anatomical characteristics of the leaves of Rubia species growing in Korea, i.e. Rubia akane, R. chinensis var. glabrescens, R. cordifolia var. pratensis were compared. As a result, it was determined that 'GgogDuSeoNiIp' was the leaf of Rubia akane and R. cordifolia var. pratensis.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.05a
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• pp.1021-1024
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• 2007

VoIP 서비스는 인터넷을 기반으로 하므로 인터넷망에서 발생하는 보안 위험이 내재해 있고, 서비스가 실시간으로 이루어진다는 특성으로 인해 기존의 보안 솔루션으로 이러한 보안 위험을 해소하기는 어렵다. 따라서 VoIP 망 구축 초기단계부터 정보보호를 고려하여 보안대책을 세우고 이를 반영하는 것이 비용과 보안 효과 측면에서 바람직하다. 본 논문에서는 상용 VPN 제품에 공개 프로젝트인 SIP VoIP Gateway 'Asterisk'을 연동하여 사용자 인증과 데이터 기밀성을 효과적으로 수행하기 위한 VoVPN(Voice over Virtual Private Network)을 설계하고 구현하였다.

• Korean Journal of Pharmacognosy
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• v.40 no.3
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• pp.165-172
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• 2009

Korean folk medicine 'MeoRuIp' has been used to cure cough, rheumatism and abdominal pain after child birth. There has been no pharmacognostical confirmation on the botanical origin of the crude drug. To clarify the botanical origin of 'MeoRuIp', the morphological and anatomical characteristics of the leaves of Vitis and Ampelopsis species growing in Korea, i.e. Vitis amurensis, V. amurensis forma. glabrescens, V. flexuosa, V. thunbergii var. sinuata and Ampelopsis brevipedunculata var. heterophylla were studied. As a result, it was clarified that 'MeoRuIp' was the leaf of Vitis amurensis and Vitis flexuosa.