• 정보보호학회논문지
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• 제34권1호
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• pp.83-102
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• 2024

최근 클라우드의 사용량이 해마다 증가하고 기업 내 원격 근무가 새로운 근무 형태 중 하나로 자리 잡으면서 클라우드 기반 원격 근무 환경의 보안이 중요해졌다. 내부 네트워크 안에 있는 모든 것은 안전하다고 가정하는 기존의 경계 기반 모델의 한계로 인해 제로트러스트 도입이 요구되고 있다. 이에 따라 NIST 및 DoD는 제로트러스트 아키텍처 관련 표준을 발간하였지만, 해당 표준의 보안요구사항은 추상적인 수준에서 논리적 아키텍처만을 기술하고 있다. 따라서 본 논문에서는 OpenStack 클라우드에 대한 위협모델링을 수행하여 NIST 및 DoD 표준에 비해 보다 상세한 보안요구사항을 제시하고자 한다. 이후 본 연구팀은 해당 요구사항에 대한 검증을 위해 상용 클라우드 서비스들에 대한 보안성 분석을 수행하였다. 보안성 분석 수행 결과 본 연구팀에서는 각 클라우드 서비스가 만족하지 못하는 보안요구사항을 식별하였다. 본 연구팀은 제로트러스트가 적용된 클라우드 서비스에 대한 잠재적 위협과 대응 방안을 제안하였으며, 이를 통해 안전한 제로트러스트 기반 원격 근무 환경을 구축하는데 도움이 되고자 한다.

• 제어로봇시스템학회논문지
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• 제19권5호
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• pp.435-441
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• 2013

A swarm robot system consists of with multiple mobile robots, each of which is called an agent. Each agent interacts with others and cooperates for a given task and a given environment. For the swarm robotic system, the loss of the entire work capability by malfunction or damage to a single robot is relatively small and replacement and repair of the robot is less costly. So, it is suitable to perform more complex tasks. The essential component for a swarm robotic system is an inter-robot collaboration strategy for teamwork. Recently, the swarm intelligence theory is applied to robotic system domain as a new framework of collective robotic system design. In this paper, FA (Firefly Algorithm) which is based on firefly's reaction to the lights of other fireflies and their social behavior is employed to optimize the group behavior of multiple robots. The main application of the firefly algorithm is performed on path planning of swarm mobile robots and its effectiveness is verified by simulations under various conditions.

• 천문학논총
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• 제27권4호
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• pp.367-373
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• 2012

The first all-sky mid-/far-infrared survey by IRAS in the 1980s, has been followed by only two more, by AKARI, from 2006, and WISE in 2010. I discuss some features of the WISE survey, and highlight some key results from early extragalactic observations that have been made by the science team during the operation of the telescope, and the post-operation proprietary period during which the public release data products were being generated. The efficient survey strategy and very high-data rate from WISE produced a catalogue of 530 million objects that was released to the public in March 2012. The WISE survey strategy naturally provided the deepest coverage at the ecliptic poles, where matched comparison fields were obtained using Spitzer, and where AKARI also observed deep fields. I describe some of the follow-up work that has been carried out based on the WISE survey, and the prospects for enhancing the WISE data by combining the AKARI survey results are also discussed. While the all-sky AKARI survey is less deep than the WISE catalogue, and is still being worked on by the AKARI science team, it includes a larger number of bands, extends to longer wavelengths, and in particular has very complementary band passes to WISE in the mid-infrared waveband, which will provide enhanced spectral information for relatively bright targets.

• 대한치과의사협회지
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• 제53권2호
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• pp.111-119
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• 2015

The importance of effective communication is increasingly stressed in the medical sector. This is crucial for the resolution of medical accidents and conflicts, and that can contribute to the prevention of the two as well. The careful attitude of the medical team toward patient safety and their communication with colleagues and other departments are mandatory for the successful decrease of dental accidents. The good communication within of the hospital organization is one of vital ways to ensure accurate diagnosis and successful treatment. In the field of health care, effective teamwork requires a shared goal, superb work skills, communication and cooperation, but this fact has been overlooked so far. Among those factors, communication is indispensable to the achievement of organizational goals, and how to boost communication by acquiring diverse skills and using appropriate tools in the dentistry should discreetly be considered. This study explared how to improve the teamwork and communication of organization in an effort to seek specific ways of reducing medical conflict in dental.

• 보건교육건강증진학회지
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• 제28권2호
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• pp.41-50
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• 2011

Objectives: Objectives: The objective of this study is to describe the WHO-CHOICE(World Health Organization- CHOosing Interventions that are Cost-Effective) programme, and to consider the application of WHO-CHOICE programme in Korea, especially on the health promotion policy. Methods: Literature review was conducted on the contents of WHO-CHOICE programme in the previous studies, guidebook, and software. We also contacted WHO-CHOICE team at WHO to identify the contents not clearly presented in the documents. Results: The WHO-CHOICE programme is a standardized tool for analyzing and comparing the cost effectiveness of health promotion policies. It is composed of PopMod to measure the health effect of intervention and of CostIt to measure the cost. The cost of tobacco control policy in Korea was analyzed with the cooperation of WHO-CHOICE team preliminary, and the results were different with the results of tobacco control policy on western pacific region of WHO. Conclusions: The cost effectiveness study based on WHO-CHOICE programme could help decide a priority of health promotion policy for settings with limited resources. For the improvement of health, the future work on WHO-CHOICE programme need to be considered.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2006년도 추계학술대회논문집
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• pp.694-698
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• 2006

This paper presents an optimal design process using beads on a body panel to improve interior noise of a passenger vehicle. Except modification of structural members, it is difficult to find effective countermeasures that can work for the intermediate frequency range from 100 Hz to 300 Hz which lies between the booming and low medium frequency. In this study, it is a major goal to find additional counter-measures for this intermediate frequency range by performing optimal design of beads on body panels. The proposed method for design optimization consists of 4 sub-steps, that is, a) problem definition, b) cause analysis, c) countermeasure development and d) validation. The objective function is minimization of interior noise level. The major design variables are the geometrical shape of a bead and combination of beads on the critical panels. Sensitivity analysis and optimization are performed according to the predefined process for an optimal design. It is verified that the proposed design decreases the level of noise transfer function above 5 dB.

• Bulletin of the Korean Chemical Society
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• 제32권4호
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• pp.1321-1326
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• 2011

In this work, the effects of different surface functional groups on the elemental mercury adsorption of porous carbons modified by chemical treatments were investigated. The surface properties of the treated carbons were observed by Boehm's titration and X-ray photoelectron spectroscopy (XPS). It was found that the textural properties, including specific surface area and pore structures, slightly decreased after the treatments, while the oxygen content of the ACs was predominantly enhanced. Elemental mercury adsorption behaviors of the acidtreated ACs were found to be four or three times better than those of non-treated ACs or base-treated ACs, respectively. This result indicates that the different compositions of surface functional groups can lead to the high elemental mercury adsorption capacity of the ACs. In case of the acid-treated ACs, the $R_{C=O}/R_{C-O}$ and $R_{COOH}/R_{C-O}$ showed higher values than those of other samples, indicating that there is a considerable relationship between mercury adsorption and surface functional groups on the ACs.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권4호
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• pp.1424-1440
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• 2015

It is a challenging problem to search the intended images from a large number of candidates. Content based image retrieval (CBIR) is the most promising way to tackle this problem, where the most important topic is to measure the similarity of images so as to cover the variance of shape, color, pose, illumination etc. While previous works made significant progresses, their adaption ability to dataset is not fully explored. In this paper, we propose a similarity learning method on the basis of probabilistic generative model, i.e., probabilistic latent semantic analysis (PLSA). It first derives Fisher kernel, a function over the parameters and variables, based on PLSA. Then, the parameters are determined through simultaneously maximizing the log likelihood function of PLSA and the retrieval performance over the training dataset. The main advantages of this work are twofold: (1) deriving similarity measure based on PLSA which fully exploits the data distribution and Bayes inference; (2) learning model parameters by maximizing the fitting of model to data and the retrieval performance simultaneously. The proposed method (PLSA-FK) is empirically evaluated over three datasets, and the results exhibit promising performance.

• 한국항행학회논문지
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• 제15권6호
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• pp.1126-1131
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• 2011

최근 교육의 패러다임이 학습자 중심으로 변화되면서 새로운 수업모델의 하나로 프로젝트 기반 수업에 대한 관심이 증대되고 있다. 대학에서는 이러한 변화를 수용하여 창의적으로 변화를 창출 할 수 있는 차세대 인재를 육성하는데 교육의 목표를 두고, 그에 따른 연구가 활발히 진행되고 있다. 본 연구에서는 대학에서 실시되는 설계 교과목의 주된 교과 내용인 프로젝트를 수행하는데 있어서, 최소화된 교수자의 개입과 주도적인 학습자 중심의 교수학습 모델을 제안하였다. 제안된 모델은 프로젝트 기반 수업의 지원체제, 팀 편성방법, 학습자의 다양한 상호작용 방법, 교수자의 팀워크 모니터링 방식 등을 제시하였으며, 이를 최근 사용이 급증하고 있는 스마트폰을 이용한 프로젝트관리 어플리케이션으로 설계 및 구현하였다.

• 한국의상디자인학회지
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• 제15권4호
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• pp.47-61
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• 2013

This paper compared and analyzed costume design shown in two movies that was adapted from the same original work, 'Snow White'. One movie consists of a western director and a western designer team while the other movie is shot by an Asian director and an Asian designer team. Two movies show similarity and difference in expression of characters in 'Snow White'. The findings are as followed;- Both movies project an image of modern women, which is mainly represented by active and confident women, However, Ishioka Eiko, the costume designer of < Mirror, Mirror >, created unique costume in the movie by applying splendid and vivid colors to western costume to make exotic feeling. On the other hand, Colleen Atwood, who was inspired by costume in each historic period and region of the Western. created costume that was closer to the tradition of the Western in his movie, < Snow White and the Huntsman >. The purpose of this study is to help the Korean movie industry to find a way to advance to the world market by fully understanding how the Easterners and the Westerners feel and express 'Snow White'. Moreover, this study may present a chance to review importance and value of the movie costume design area.