• Korean Journal of Mathematics
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• 제18권1호
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• pp.97-103
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• 2010

It is well known that the group ring K[G] has the nontrivial Jacobson radical if K is a field of characteristic p and G is a finite group of which order is divided by a prime p. This paper is concerned with the structure of the Jacobson radical of such a group ring.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.31-33
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• 2003

Recently, KARI developed in-house meteorological sensor processing system named MESIS for GOES GVAR 5-CH Imager for better KOMPSAT EOC mission operation. MESIS consists of antenna system, receiver, serial telemetry card, processing and mapping software, and 2 NT PC systems. This paper shows system requirement, system design, characteristic and test results of processing system. System operation concept and sample image are also provided. Implemented system was proven to be fully operational through lots of operations covering from RF signal reception to web publishing.

• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.377.3-378
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• 2002

Eight compounds were isolated from the MeOH extracts of Erythrina senegalensis for HIV-1 protease inhibitors. Their structures were elucidated as eight isoflavonoids by spectroscopic analysis. These compounds showed dose dependent inhibitory activities on HIV-l protease with $IC_{50}$ values from 0.5 to 30.0 ${\mu}$M. (omitted)

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2004년도 추계학술발표논문집(상)
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• pp.35-38
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• 2004

센서 데이터 스트림 처리 기술은 유비쿼터스 컴퓨팅의 핵심 기술로 그 중요성이 날로 증대되어, 현재 산업계는 물론 학계에서도 그 역량을 이에 집중하고 있다. 본 논문에서는, 센서 데이터 스트림에 대한 특징 및 이를 처리하기 위한 산업계와 학계의 동향을 알아본다. 그리고, 대용량 센서데이터 스트림을 처리하기 위해 요구되어지는 기능을 정리하고, 이를 기반으로 센서 데이터 스트림처리 시스템의 구조를 설계한다.

• Restorative Dentistry and Endodontics
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• 제29권3호
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• pp.212-218
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• 2004

The purpose of this study was to quantify the amount of remaining gutta-percha/sealer on the walls of root canals when three types of nickel-titanium rotary instruments (Profile. ProTaper and $K^3$) and a hand instrument(Hedstrom file) used to remove these materials. The results of this study were as follows: 1. In the total time for gutta-percha removal. Profile group was the fastest and followed by $K^3$, Protaper, Hedstrom file group. 2. In case of the evaluation of the volume of remained gutta-percha from radiograph. $K^3$ group got the highest score and followed by Protaper. Hedstrom file. Profile group in the apical 1/3. 3. In case of the evaluation of the volume of gutta-percha remained from stereomicroscope, $K^3$ group got the highest score and followed by Protaper. Hedstrom file. Profile group in the apical 1/3. These results showed that instrumentation using nickel-titanium rotary instrument groups was faster than that using hand instrument group. The effect of gutta-percha removal using Profile group was better than that using Protaper and $K^3$ group in the nickel-titanium rotary instrument groups.

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2008년도 Asian Magnetics Conference
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• pp.223.2-223.2
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• 2008

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2008년도 Asian Magnetics Conference
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• pp.36.1-36.1
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• 2008

• 대한지역사회영양학회:학술대회논문집
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• 대한지역사회영양학회 2004년도 춘계학술대회
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• pp.437.1-437
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• 2004

The protein, called PTP1B (protein tyrosine phosphatase 1B), joins a list of enzymes that mice are associated with obesity. The purpose of this study was to investigate the effects of PTP1B inhibitors and taurine on blood lipid profiles in adolescents obesity model rats. Three week-old thirty-six male Sprague-Dawley rats were randomly assigned to six groups (high fat diet group; HFD group, high fat diet ＋ taurine group; HF＋TR group, high fat diet＋PTP1B inhibitor A group; HF＋A group, high fat diet＋PTP1B inhibitor B; HF＋B group, high fat diet＋PTP1B inhibitor A＋taurine group; HF＋A＋TR group, high fat diet ＋ PTP1B inhibitor B＋taurine group; HF＋B＋TR group).(omitted)

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권2호
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• pp.935-949
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• 2016

In this paper, we present a novel authenticated group key distribution scheme for large and dynamic multicast groups without employing traditional symmetric and asymmetric cryptographic operations. The security of our scheme is mainly based on the basic theories for solving linear equations. In our scheme, a large group is divided into many subgroups, where each subgroup is managed by a subgroup key manager (SGKM) and a group key generation center (GKGC) further manages all SGKMs. The group key is generated by the GKGC and then propagated to all group members through the SGKMs, such that only authorized group members can recover the group key but unauthorized users cannot. In addition, all authorized group members can verify the authenticity of group keys by a public one-way function. The analysis results show that our scheme is secure and efficient, and especially it is very appropriate for secure multicast communications in large and dynamic client-server networks.

• 치과방사선
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• 제24권2호
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• pp.291-304
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• 1994

The purpose of this study was to analyze the facial asymmetry of the patients with the craniomandibular disorder. In this study, 50 patients, who have joint clicking and pain, mouth opening limitation, and 40 dental students, Chosun University, who did not posses any restoration and orthodontic treatment, joint clicking and pain, mouth opening limitation, were selected as the control group. Both the control group and the patient group were takened skull P-A, submento-vertex radiogram by standized methods. After that, the deviation and facial asymmetry were measured and analyzed. The results of the this study were as follows: 1. In the Skull P-A radiogram, the width difference of control group and patient group measured that the △ Cg-Go-Cl: control group were 3.35㎜, patient group were 4.51㎜ (P<0.05), the △Cg-Zy-Go: control group were 1.83㎜, patient group were 3.27㎜(P<0.001). 2. In the Skull P-A radiogram, the height difference of control group and patient group measured that the △ Cg-Go-Cl: control group were 131.85㎜, patient group were 188.45㎜(P<0.05), the △Cg-Zy-Go: control group were 1.58㎜, patient group were 2.68㎜(P<0.00l). 3. In the Skull P-A radiogram, the area difference of control group and patient group measured that the △ Cg-Go-Cl: control group were 120.76㎟, patient group were 185.49㎟(P<0.05), the △Cg-Zy-Go: control group were 2.29㎟, patient group were 3.37㎟(p<0.05). 4. In the submento-vertex radiogram, the width difference of control group and patient group measured that the △Mr-Cl-Ia: control group were 1.50㎜, patient group were 2.35㎜(P<0.05), the △Mr-Cm-Ia: control group were 1.75㎜, patient group were 3.17㎜(P<0.05), the △Mr-Go-Ia: control group were 1.96㎜, patient group were 3.24㎜(P<0.001), the △Mr-Cp-Co: control group were 1.74㎜, patient group were 2.73㎜(P<0.05). 5. In the submento-vertex radiogram, the height difference of control group and patient group measured that the △Mr-Cp-Ia: control group were 1.68㎜, patient group were 2.46㎜P<0.05), the △Mr-CI-Ia: control group were 2.38㎜, patient group were 3.74㎜(P<0.05), the △Mr-Co-Ia: control group were 1.63㎜, patient group were 2.80㎜(P<0.05), the △Mr-Cm-Ia: control group were 1.45㎜, patient group were 3.12㎜(P<0.001). 6. In the submento-vertex radiogram, the area difference of control group and patient group measured that the △ Mr-Cp-Ia: control group were 73.17㎟, patient group were 110.16㎟(P<0.05), the △Mr-Cl-Ia: control group were 105.09㎟, patient group were 180.87㎟(P<0.001), the △Mr-Co-Ia: control group were 103.31㎟, patient group were 148.48㎟(P<0.05), the △Mr-Cm-Ia: control group were 97.01㎟, patient group were 167.83㎟(P<0.05), the △Mr-Go-Ia: control group were 104.24㎟, patient group were 205.90㎟(P<0.05).