• Archives of Pharmacal Research
• /
• v.29 no.1
• /
• pp.59-63
• /
• 2006

Secalonic acid D(SAD) was isolated as the major secondary metabolite of the marine lichen-derived fungus Gliocladium sp. T31. Its structure was established on the basic of physicochemical and spectroscopic data. This is the first report on the isolation of SAD from this fungus, as well as its inhibitory effect on K562 cell cycle and its cytotoxicity against several tumor cell lines in vitro.

• Journal of international Conference on Electrical Machines and Systems
• /
• v.3 no.1
• /
• pp.93-97
• /
• 2014

Evaporative cooling system has the advantage of high cooling performance, good insulation properties, less electrical fault, easy to maintain and high reliability, can meet the requirements of the cooling system in wind power generators. Based on a large number of theoretical researches and engineering practices, we had a comprehensive study of evaporative cooling wind power generator. Studies show that evaporative cooling system has advantage as the cooling system of wind power generator.

• Bulletin of the Korean Chemical Society
• /
• v.34 no.5
• /
• pp.1537-1540
• /
• 2013

• International Journal of Naval Architecture and Ocean Engineering
• /
• v.6 no.3
• /
• pp.670-684
• /
• 2014

Ship Information Systems (SISs) have been one of the main research focuses in ship design and become a multidisciplinary area. With these growing research trends, it is important to consolidate the latest knowledge and information to keep up with the research needs. In this paper, the SIS and its different forms are introduced and discussed. The beginning of this paper discusses the history and evolution of SIS. The next part of this paper focuses on different fields and research areas such as networking technology, information fusion, information decision, message display, ship control in real-time SISs. A Semi-Physical Simulation Platform (SPSIM) designed for SIS research and its running effect through a new Fuzzy-PID fusion algorithm are introduced in this paper then. A brief literature survey and possible future direction concerning each topic is included.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2013.11a
• /
• pp.85-87
• /
• 2013

본 논문에서는 환경 잡음에서 사람들의 비명소리를 검출하여, 위험상황을 식별하는 방법용 시스템을 구축하기 위해 비명소리의 특징을 분석한다. 비명 소리는 놀랬을 때, 다급할 때, 아플 때, 세 가지 상황으로 나누어 녹음을 진행하였고, 이를 주파수 신호로 바꾸어 분석을 하였다. 비명소리 데이터에서 amplitude 가 가장 크게 나타나는 주파수 대역을 분석하고, 상황 별로 비명소리에 대한 주파수 분포의 차이, 남성과 여성의 주파수 대역과 분포의 차이를 분석한다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2003.05c
• /
• pp.91-94
• /
• 2003

The purpose of this project is to research and development of thin film supercapacitor with conducting polymer composite electrodes and polymer electrolyte which have high energy density for thin film supercapacitor. We investigated cyclic voltammetry and charge/discharge cycling of PFPT-flyash electrodes. The first discharge capacity of PFPT-flyash electrode with 40wt.% flyash was 24F/g, while that of PFPT-VOflyash electrode with 40wt.% VOflyash was 32F/g. The capacitance of PFPT-VOflyash composite film with polymer electrolyte was 32 F/g at 1st and 20th cycle, respectively. The capacitance of PFPT-VOflyash/Li cell with 40 wt% VOflyash was 141 F/g at 8th cycle.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2007.06a
• /
• pp.336-337
• /
• 2007

The energy conversion characteristics of $TiO_2$ paste of dye-sensitized solar cell (DSSC) was investigated. In the case of DSSC without a binder, the current density increased due to the development of porosity. As for DSSC with a binder, the fill factor increased due to the development of network among the particles. The energy conversion efficiency of 7.2% was obtained due to the porosity and the network as for DSSC with the mixed binder (Vol. 50:50).

• Steel and Composite Structures
• /
• v.13 no.6
• /
• pp.561-570
• /
• 2012

Seismic collapse analysis requires efficient and automated method to perform thousands of time history analyses. The paper introduced the advantages of speed and convergence property of explicit method, provided a few techniques to accelerate speed of calculation and developed an automated procedure for collapse assessment, which combines the strong capacity of commercial explicit finite element software and the flexible, intelligent specialties of control program written in FORTRAN language aiming at collapse analysis, so that tedious and heavy work of collapse analysis based on FEMAP695 can be easily implemented and resource of calculation can be made the best use of. All the key commands of control program are provided to help analyzers and engineers to cope with collapse assessment conveniently.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.16 no.6
• /
• pp.1089-1094
• /
• 2021

In order to support the restoration and construction work of port infrastructure facilities damaged or damaged due to disasters and disasters, it is linked with work equipment based on the performance of duties such as regular patrol in the port, monitoring the underwater environment, and acquisition of underwater configuration information in the port, Define content related to AUV platform analysis and design that can support construction.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2011.04a
• /
• pp.1020-1023
• /
• 2011

최근 스마트 모바일이 성장하면서 다양한 서비스들이 이루어지고 있다. 그 중에 모바일 오피스를 사용할 때 내부 망을 방문해야 한다. 그에 대한 보안 문제는 매우 중요하다. 본 논문은 모바일 기기가 내부 망에 방문할 때 사용자를 인증하기 위하여 통신의 보안 터널과 VPN(Virtual Private Network)기술을 사용하고, 모바일 기기가 내부 망에 방문할 때 OTP(One-Time Password)와 같은 동적인 패스워드 인증을 통해서 안전한 터널과 인증 서비스를 제공한다.