• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.155-157
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• 2013

예인시스템의 설계는 예인준비 과정에서 취해질 단계적 지침과 예인선을 선택하고 예인속력을 예측하는 것을 포함한다. 예인시스템을 설계할 때에는 외력환경의 변화 가능성과 예상치 못한 상황을 고려하여 예인선 및 예인설비를 선택하기 때문에 예인색장력 계산, 예인선 및 예인장비의 선정, 그리고 확인 및 수정단계와 같은 주요 3가지 단계를 반복 계산하는 과정이 요구되고, 이를 통하여 최적의 예인시스템을 설계하게 된다. 예인을 계획하고 시스템을 설계할 때 고려할 사항은 예인의 크기 및 조건, 요구되는 예인속력, 사용가능한 예인선의 용량과 예인색 사양, 예인저항에 의한 예인색 장력과 동적하중, 예인색 현수부를 감안한 수심과 예인색길이, 그리고 예인선의 복원성 등을 고려하여야 한다. 이러한 요소들은 상호 연관성이 있으며, 예인속력은 날씨 또는 예인조건에 따라 제한될 수 있다. 그리고 예인시스템은 최상의 배치가 이루어졌는지 확인하기 위해 전체적으로도 점검되어져야 한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.28 no.1
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• pp.73-83
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• 2018

There has been increasing interest from NIST and other companies in studying post-quantum cryptography in order to resist against quantum computers. Multivariate polynomial based, code based, lattice based, hash based digital signature, and isogeny based cryptosystems are one of the main categories in post quantum cryptography. Among these categories, isogeny based cryptosystem is known to have shortest key length. In this paper, we implemented Supersingular Isogeny Diffie-Hellman (SIDH) protocol efficiently on low-end mobile device. Considering the device's specification, we select supersingular curve on 523 bit prime field, and generate efficient isogeny computation tree. Our implementation of SIDH module is targeted for 32bit environment.

• The Korean Journal of Nuclear Medicine
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• v.39 no.1
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• pp.1-8
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• 2005

This paper is described on the development of KOTRON-13 and recent status of PET cyclotron by commercial cyclotron companies. KIRAMS has developed medical cyclotron which is KIRAMS-13. Samyoung Unitech produces KOTRON-13 with transfered technology by KIRAMS. As a part of Regional Cyclotron Installation Protect, KOTRON-13 cyclotrons and $[18F]FDG$ production modules are being installed at regional cyclotron centers in Korea. The medical concern with radiation technology has been growing for the last several years. Early cancer diagnosis through the cyclotron and PET-CT have been brought to public attention by commercial cyclotron models in the world. The new commercial cyclotron models are introduced compact low energy cyclotrons developed by CTI, GE, Sumitomo in recent. It produces different short-lived radioisotopes, such as $[^{18}F],\;[^{11}C],\;[^{13}N]\;and\;[^{15}O]$. For the better reliability acceleration particle is proton only. The characteristics of new model cyclotrons are changed to lower energy corresponding to less 13 MeV. New models have self-shielding and low power consumption. Design criteria for the different types of commercial cyclotrons are described with reference to hospital demands.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.12 no.1
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• pp.85-92
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• 1998

In this paper, we design a sequential system controller, which is capable of processing parallel sequence, on the basis of analysis of control specification described by Petri Net with incidence matrix. The sequential system controller consists of input conditioning unit and petri net control unit which is composed of the token control unit and firing unit. The firing unit determines the firing condition of the transfer signal on the basis of the token status of token control unit. By the proposed scheme, we can easily develop and implement the sequential system controller of automated warehousing system, automated transportation system, elevator system, and so on, as it is possible to modify control specification by changing simply the content of incidence matrix ROM and to expand easily functional capacity as the result of modular design.design.

• Journal of Digital Convergence
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• v.16 no.5
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• pp.33-42
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• 2018

This paper is based on the suggestions of the prior research on the buyer feedback, the selection of various product options, and the payment procedure improvements for Korea ON-line E-Procurement System(KONEPS), and this is to confirm the necessity of improvement and satisfaction from the viewpoint of the workers of the public and subordinate organizations the purchasing and using of the computer equipment in the actual KONEPS(Korea ON-line E-Procurement System). Based on the basic questionnaires and in-depth interviews, this paper conducts the qualitative case studies on IT and non - IT workers who had purchasing experiences for equipment at public institutions and government agencies in Gyeongbuk province. As results of the study, it was confirmed that the improvement is necessary for the buyer feedback and option selection part, and that there is a difference among the work experience for the simplification of the payment procedure and the satisfaction. In addition, the biggest contribution in the provided research is to categorize and to analyze the opinions on the use of public and relevant subordinate research participants. Additional work will be needed for a large number of workers in public and subordinate organizations who have purchasing experiences for handling various procurement products and those working in the metropolitan area and other public and subordinate agencies.

• KIPS Transactions on Software and Data Engineering
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• v.2 no.8
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• pp.571-578
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• 2013

The IHO S-100 is a standard on the universal hydorgraphic data model for supporting information services that integrate various data in maritime and provide proper information for safety of vessels. The S-100 is used to develop S-10x product specifications which are standards on guideline for creation and delivery of specific data set in maritime. The product specification for feature-based data such as ENC(Electronic Navigational Chart) data includes a feature catalogue that describes characteristics of features in that feature-based data. The feature catalogue is developed by domain experts with knowledge on data of the target domain. However, it is not feasible to develop a feature catalogue according to the XML schema by manual. In the IHO TSMAD committee meeting, needs of developing technology on building feature catalogue has been discussed. Therefore, we present a feature catalogue builder that is a GUI(Graphic User Interface) system supporting domain experts to build feature catalogues in XML. The feature catalogue builder is developed to connect with the FCD(Feature Concept Dictionary) register in the IHO(International Hydrographic Organization) GI(Geographic Information) registry. Also, it supports domain experts to select proper feature items based on the relationships between register items.

• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.512-517
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• 2006

본 논문은 지난 5년간의 모바일 메뉴 아이콘의 디자인 분석을 통해 현재의 모바일 폰에 적용되고 있는 아이콘 디자인 법칙을 밝히는 것을 목적으로 한다. 현재 제조사에 따라 다르게 제공되는 하드웨어 안에 아이콘(ICON) 디자인 또한 서로 다르게 구성되어 있어 사용자들은 일관성 없는 이미지에 혼란스럽다. 새로운 모바일 폰이 개발되면 그 내부 인터페이스도 모바일 폰 기기 사양이 담고 있는 기능들에 의해 다듬어 지고 정리된 메뉴기능을 내장해야 한다. 본인은 앞에서 언급했던 모바일 폰의 인터페이스를 구성하고 있는 아이콘의 디자인을 내용분석 하였다. 모바일 아이콘 전반적 디자인 변화를 살펴보고 점차 증가하고 있는 모바일 폰의 특성을 살펴 본 후에 아이콘을 담고 있는 인터페이스를 제품별, 제조사별, 년도 별로 분류하고 디자인 법칙을 찾아보았다. 그리하여 국내 모바일 폰의 메뉴 아이콘을 의미표현 유형과 아이콘의 크기, 아이콘의 애니메이션 정도, 아이콘 주변 경계, 공간 표현, 아이콘에 적용 된 라이트와 음영 위치, 아이콘 시각표현, 배경의 유무, 선택 시 반응에 따라 애니메이션 유무, 아이콘의 선택 시 크기변화, 아이콘의 테두리선 유무, 아이콘의 색상 반전 유무, 아이콘의 그림자 유무를 분석 기준으로 잡고, 이런 모바일 아이콘의 요소 별 디자인에 적용된 법칙들을 내용분석을 통해 발견하였다. 모바일 아이콘 디자인 내용분석을 통해 2001년부터 2005년까지 국내에 출시된 모바일 아이콘 디자인들이 역사적으로 어떻게 변하였는지 정리하였다. 디자인이 빠르게 변화하고 있는 지금, 새로운 디자인을 발견하기에 앞서 지금까지 국내 모바일 아이콘 디자인의 시대적 변화를 되돌아보고, 살펴보는 연구를 하였다.

• Proceedings of the KIEE Conference
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• 2000.07d
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• pp.3236-3237
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• 2000

본 논문에서는 의료 영상분야에서 많이 활용되고 있는 기존의 영상 획득,저장 및 전송 시스템(PACS)에 스테레오 내시경 영상이 추가될 수 있도록 기존의 PACS에 스테레오 기능의 관찰(viewing) 시스템을 추가하였으며 기본 기능으로 1) 3차원 스테레오 좌,우 독립 영상의 선택과 합성 2) 기존의 합성된 스테레오 영상의 선택이 가능하도록 하였으며 3) 스테레오 영상의 Dicom 표준이 없는 상황을 고려하여 기본적인 카메라 관련 사항(카메라 사양, 초점 거리, 베이스라인 등)을 입력할 수 있는 기록 필드를 삽입하였다. 또한 임상적으로 수용 가능한 3차원 스테레오 영상의 PACS내 효율적 저장법을 제시하기 위하여 의료 영상에 많이 활용되는 JPEG과 Wavelet 압축법을 각각 이용하여 3차원 좌,우 독립영상과 복합 영상의 효율적 압축비를 PSNR을 중심으로 비교하였다.

• Journal of the Korean Society of Food Science and Nutrition
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• v.11 no.1
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• pp.57-68
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• 1982

In order to investigate the effect of dietary protein and energy on growing female and male rats, Sprague-Dawley 90 female rats and 54 male rats of 3 weeks old weighing approximately 70-80g and 65-75g, respectively, were subjected to feeding trials for 8 weeks and then subsquently to metabolic trials for 2 weeks. Three dietary energy levels (3200, 3600, 4000 kcal ME/kg) were employed and each energy level contained three protein levels (15, 25, 35% of 3600 kcal ME/kg) and three fat levels (10, 20, 40% of 3600 kcal ME/kg) by addition of an appropriate amount of carbohydrate and the following results were obtained. The body weight gain of female rats was highest for LPHE ration but that of male rats was highest for LPME ration. The weight gains both of female and male rats were not affected by the level of protein. Food efficiencies both of female and male rats was affected by the level of protein, whereas that of male rats was not. Protein efficiencies of female and male rats were highest at low protein level and tended to decrease as the level of protein increased, but that of female rats was highest at high energy level, while that of male rats was highest at medium energy level. The analysis of the body composition after feeding trials for 8 weeks has shown that the contents of body water and protein were not affected by protein level both in female and male rats. The content of body fat increased remarkably as the protein and energy levels increased in case of female rats, but it was not affected by the protein and energy levels in case of male rats. From the above-mentioned experimental results it may be con eluded that the best formula of diet of growing female rats may be composed of low protein (13%) and high energy levels (4000 kcal/kg) whereas that for male rats may be composed of low protein (13%) and medium energy levels (3600 kcal/kg), since all the efficiencies of food, protein and energy have shown to be best at these levels.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06a
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• pp.113-115
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• 2012

안드로이드 앱의 불법 복제를 방지하고자 기존에 온라인 실행(Online Execution Class: OEC) 또는 앱을 암호화된 상태로 배포하여 실행 시에 적법한 사용자만이 암호를 복호화하여 실행이 가능하도록 하는 방법들이 있다. 하지만 스마트폰이 저전력과 저사양인 점을 고려할 때, 위에 방법은 스마트폰의 보안을 보장할 수 있지만 성능 면에서 부담이 된다. 본 논문에서 OEC를 암호화하여 보안 수준을 높이고 개발자에게 보안 수준을 선택할 수 있게 하여 환경에 맞추어 안전을 유지할 수 있도록 시스템 설계를 제안한다.