• Macromolecular Research
• /
• 제17권5호
• /
• pp.285-288
• /
• 2009

• Proceedings of the Korean Institute of Communication Sciences Conference
• /
• 한국통신학회 2006년도 하계종합학술발표회 논문 초록집
• /
• pp.688-688
• /
• 2006

• Proceedings of the Korean Institute of Communication Sciences Conference
• /
• 한국통신학회 2006년도 하계종합학술발표회 논문 초록집
• /
• pp.516-516
• /
• 2006

• Proceedings of the Korean Institute of Communication Sciences Conference
• /
• 한국통신학회 2006년도 하계종합학술발표회 논문 초록집
• /
• pp.673-673
• /
• 2006

• Journal of Microbiology and Biotechnology
• /
• 제21권10호
• /
• pp.1057-1063
• /
• 2011

Herein, a novel ginsenosidase, named ginsenosidase type IV, hydrolyzing 6-O-multi-glycosides of protopanaxatriol-type ginsenosides (PPT), such as Re, R1, Rf, and Rg2, was isolated from the Aspergillus sp. 39g strain, purified, and characterized. Ginsenosidase type IV was able to hydrolyze the 6-O-${\alpha}$-L-($1{\rightarrow}2$)-rhamnoside of Re and the 6-O-${\beta}$-D-($1{\rightarrow}2$)-xyloside of R1 into ginsenoside Rg1. Subsequently, it could hydrolyze the 6-O-${\beta}$-D-glucoside of Rg1 into F1. Similarly, it was able to hydrolyze the 6-O-$_{\alpha}$-L-($1{\rightarrow}2$)-rhamnoside of Rg2 and the 6-O-${\beta}$-D-($1{\rightarrow}2$)-glucoside of Rf into Rh1, and then further hydrolyze Rh1 into its aglycone. However, ginsenosidase type IV could not hydrolyze the 3-O- or 20-O-glycosides of protopanaxadiol-type ginsenosides (PPD), such as Rb1, Rb2, Rb3, Rc, and Rd. These exhibited properties are significantly different from those of glycosidases described in Enzyme Nomenclature by the NC-IUBMB. The optimal temperature and pH for ginsenosidase type IV were $40^{\circ}C$ and 6.0, respectively. The activity of ginsenosidase type IV was slightly improved by the $Mg^{2+}$ ion, and inhibited by $Cu^{2+}$ and $Fe^{2+}$ ions. The molecular mass of the enzyme, based on SDS-PAGE, was noted as being approximately 56 kDa.

• Journal of Korean Ophthalmic Optics Society
• /
• 제6권2호
• /
• pp.77-80
• /
• 2001

The purpose of this work is that by using speckle phenomena of low-level He-Ne laser, it analyzes the movement condition of surface elements on a substance vibrating. The lights from laser reflect against a copper plate and will be shown as speckles on a vibration board. If we vibrate these speckles by sound waves of a speaker installed on the back, the speckles change with various shapes. When a vibration board has a maximum vibration, the frequency becomes a dynamical resonance frequency and we can mark the changes of speckles at that time on a vibration board.

• Advances in concrete construction
• /
• 제15권3호
• /
• pp.149-159
• /
• 2023

Water glass (WG) and sodium sulfate (SS) were used to prepare polymeric aluminum chloride residue cement mortar (PACRM) by single and compound blending with polymeric aluminum chloride waste residue, respectively. The structural strength and textural characteristics examinations showed that PACRM consistency increased by incorporating WG, but decreased by incorporating SS. When WG and SS were compounded, the mortar consistency initially rose before falling. The compressive strength of PACRM increased and then decreased as WG was increased. The mechanical properties of PACRM were better enhanced by SS than WG, showing no strength deterioration. The main reason for the improved mechanical properties of polymeric aluminum chloride waste residue in the presence of activators is the increased precipitation of reactive substances, such as C-S-H gels, calcium silica, and Ca(OH)₂. The density of the specimens with PACRM and the degree of aggregation of hydration products were significantly enhanced by generating more hydration products in the mortar. Further, the cracks and pores were significantly reduced, and the matrix structure was continuous and dense at 5% SS doping and 3% compound doping.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제16권5호
• /
• pp.1653-1670
• /
• 2022

The fear that location privacy may be compromised greatly hinders the development of location-based service. Accordingly, some schemes based on the distributed architecture in peer-to-peer network for location privacy protection are proposed. Most of them assume that mobile terminals are mutually trusted, but this does not conform to realistic scenes, and they cannot make requirements for the level of location privacy protection. Therefore, this paper proposes a scheme for location attribute-based security authentication and private sharing data group, so that they trust each other in peer-to-peer network and the trusted but curious mobile terminal cannot access the initiator's query request. A new identifier is designed to allow mobile terminals to customize the protection strength. In addition, the caching mechanism is introduced considering the cache capacity, and a cache replacement policy based on deep reinforcement learning is proposed to reduce communications with location-based service server for achieving location privacy protection. Experiments show the effectiveness and efficiency of the proposed scheme.

• Annual Conference of KIPS
• /
• 한국정보처리학회 2021년도 추계학술발표대회
• /
• pp.808-810
• /
• 2021

얼굴 인식 기술들은 다양한 인공지능 플랫폼들의 발달 및 알고리즘들의 연구 개발로 인해 발전하고 있다. 대부분의 얼굴 인식 알고리즘들은 정확도를 높이기 위해 많은 양의 데이터 학습을 요구하고 잇다. 그러나 커피숍이나 음식점과 같이 사람들이 짧은 시간 머물고 있는 환경에서는 사람들의 출입 여부를 체크하기 기존의 얼굴인식 기술들을 적용함에 있어 학습량의 부족으로 부적합하다. 이에 본 논문에서 카페와 음식점의 사용자 출입 관리를 위한 단시간 얼굴 학습을 통한 얼굴 인식 시스템 구현한다. 이로 인해 카페 및 음식점의 운영자는 사용자들의 입·출입 데이터를 활용하여 테이블 회전율 분석 및 코로나19 방역수칙인 카페 2인 이상 1시간 이내 사용을 체크가 가능하다.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1998년도 제13차 학술회의논문집
• /
• pp.380-385
• /
• 1998