• Proceedings of the KAIS Fall Conference
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• 2011.05a
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• pp.45-48
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• 2011

본 논문에서는 RFID 보다 뛰어난 보안 서비스를 제공하는 NFC의 세 가지 운영모드인 Reader/Writer 모드, Card Emulation 모드, Peer-to-Peer 모드를 살펴보고, NFC 보안 기술인 NFC-SEC에서 제공하는 Key Agreement, Key Confirmation, SSE, SCH를 분석한다. 접속 과정의 경량화를 위해서 마스터 키를 갱신하여 유지하는 프로토콜을 제안하고, 제안 프로토콜을 분석 및 평가한다.

• Journal of Information Management
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• v.29 no.2
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• pp.37-53
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• 1998

The organization of university library is still not corresponding effectively with the infomation age. Therefore, the purpose of this study is to survey and analyze an organizational change which appears in the process of automatization, and to provide of fundamental elements for the efficient management in university library.

• Journal of Information Management
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• v.28 no.2
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• pp.20-53
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• 1997

To use SGML, which is international standard of markup language to construct fulltext database in digital libraries, the DTD is developed first. It is based on structure analysis of document. This study develops the SGML DTD for Korean document through document structure analysis of the Journal of the Korean Society for Information Management.

• Archives of Pharmacal Research
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• v.18 no.4
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• pp.249-255
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• 1995

The changes in the levels of the extracellular dopamine metabolites and the responses to various dopamine agents were studied by using microdialysis inhyperglycemic rat striatum. The hyperglycemia were induced by the administriation of streptozotocin (40 mg/kg, i.p. for 3 days.). The basal levels of striatal dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA) were significantly decreased in hyperglycemic rat striatum. After the administration ofl D-1 and D-2 receptor antagonists, SCH-23390 and (-)sulpiride, to rats 14 days after the last administration of STZ, the increased rates in DOPAC levels were higher in hyper- than in normoglycemic rats. However, after the administration of dopamine autoeceptor agonist, 3(-)PPP, the levels of the extracellular HVA were increased in normoglycemic rats, but those were not altered in hyperglycemic rats. The results indicate that the striatal dopamine activities were decreased in the hyperglycemic rats and suggest that release of dopamine may be decreased in hyperglycemic rats. Furthermore it suggest that the increase in the levels of the extracellular dopamine metabolites by dopamine antagonists might be dur to the incrrased sensitivities of the dopamine receptors in hyperglycemic state.

• Macromolecular Research
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• v.16 no.8
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• pp.711-716
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• 2008

We synthesized gold nanonetwork using the amphiphilic polymer brush, poly(oxyethylene) containing decyltri(oxyethylene)thiomethyl ($C_{10}H_{21}(OCH_2CH_2)_3SCH_2-$) side groups, as a stabilizer and/or a template. When tetrabutylammonium borohydride solution in THF was added to a mixture solution of the polymer and $LiAuCl_4$ in THF, 0-D gold nanomaterials were obtained. However, when an aqueous solution of sodium borohydride was added, gold nanonetworks were synthesized. The composites composed of polymer/0-D gold nanomaterials and polymer/gold nanonetworks showed electrical conductivities of ${\sim}10^{-9}$ and ${\sim}10^{-3}S/cm$, respectively, which indicated that the gold nanonetworks increased the electrical conductivity.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.22 no.11
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• pp.781-787
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• 2010

To improve the efficiency of piping, recently the pre-fabrication piping system has been introduced, and much attention has been paid to TBPs which can replace Tee-joint. Forming and forming analysis on TBPs made from Carbon steel pipes for pressure service(KS D 3562 Sch40) and Stainless steel pipes(KS D 3576 20S) have been conducted to determine working pressure. Forming and forming analysis objects are $32A{\times}25A$, $40A{\times}25A$, $40A{\times}32A$, $50A{\times}25A$, $50A{\times}32A$, $50A{\times}40A$ TBPs.

• Archives of Pharmacal Research
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• v.17 no.6
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• pp.398-404
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• 1994

The behavioral response, depamine metabolism, and characteristics of dopamine subtypes after developing the hyperlycemia were studied in the striata of rats. In animals developed hyperglycemia, the on-set duration of cataleptic behavior responded to SCH 23390 injection was delayed abd shortened, respectively. However, the cataleptic response to spiperone occurred significantly earlier in on-set and prolonged in duration. Dopamine metabolites, dihydroxyphenylacetic acid (DDPAC) and homovanillic acid (HVA), were significantly reduced in teh striata of hyeprglycemic rats. However, level of DA was significantly increased. It is noted that the ratios of DOPAC and HVA to DA were decreased, suggesting decreased tumover of DA. The affinity of striatal D-1 receptors was significantly increased without changes in the number of binding sites, while the maximum binding number of D-2 recptors was significantly increased without affecting its affinity in the diabetic rats. These results indicate that the dopaminergic activity in striatia was altered in hyperglycemic rats. Furthermore, it suggests that the upregulation of dopamine receptors might be due to the decreased dopamine matabolism.

• Korean journal of applied entomology
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• v.32 no.4
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• pp.440-449
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• 1993

Six species of the genus Eupithecia: E. okadai Inoue, E. scribai Prout, E. perpaupera Inoue, E. kobayashii Inoue, E. tripunctaria Herrich-Sch ffer, and E. virgaureata Doubleday are newly reported from Korea, with illustration of genitalia of both sexes. Further 5 previously known species are also included.

• Journal of Electrical Engineering and information Science
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• v.2 no.5
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• pp.72-78
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• 1997

This paper presents a fuzzy relaxation algorithm, which is based on the possibility and FAM instead of he probability and compatibility coefficients used in most of existing probabilistic relaxation algorithms, Because of eliminating stages for estimating of compatibility coefficients and normalization of the probability estimates, the proposed fuzzy relaxation algorithms increases the parallelism and has a simple iteration scheme. The construction of fuzzy relaxation scheme consists of the following three tasks: (1) definition of in/output linguistic variables, their term sets, and possibility. (2) Definition of FAM rule bases for relaxation using fuzzy compound relations. (3) Construction of the iteration scheme for calculating the new possibility estimate. Applications to region segmentation an ege detectiojn algorithms show that he proposed method can be used for not only reducing the image ambiguity and segmentation errors, but also enhancing the raw edge iteratively.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.10a
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• pp.159-162
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• 2001

기존 감시 시스템은 제약된 공간내에서 감시 할 수 있어 보안 인력의 낭비와 고가의 시스템 설치비용이 소모된다. 이런 한계를 넘어 언제 어디서든지 필요에 따라 모바일 디바이스로 감시 서버에 접속하여 지정된 장소의 상황을 확인 할 수 있는 시스템을 구현하였다. 본 무선인터넷 기반 감시 시스템은 SKT-Service API 를 탑재하였고 삼성전자 SCH-X35O 무선단말기에 적용하였으며 PNG 파일 포멧을 적용하였으며 우수한 성능을 나타내었다.