• 한국정보과학회논문지:시스템및이론
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• 제34권3호
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• pp.113-123
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• 2007

본 논문에서는 $GF(2^m)$상의 고속 타원곡선 암호 프로세서를 제안한다. 제안한 암호 프로세서는 타원곡선 정수 곱셈을 위해 Lopez-Dahab Montgomery 알고리즘을 채택하고， $GF(2^m)$상의 산술 연산을 위해 가우시안 정규 기저(Gaussian Normal Basis: GNB)를 이용한다. 본 논문에서 구현한 타원곡선 암호 프로세서는 m=163을 선택하였으며 NIST(National Institute of Standard and Technology)에서 권고하는 5개의 $GF(2^m)$ 필드 크기 중에서 가장 작은 값으로 GNB 타입 4가 존재한다. 제안한 타원곡선 암호 프로세서는 Host Interface, Data Memory, Instruction Memory, Control로 구성되어 있으며 Xilinx XCV2000E FPGA칩을 이용하여 구현한다. FPGA 구현결과 제안된 타원곡선 암호 프로세서는 기존의 연구결과에 비해 속도에서 약 2.6배의 성능 향상을 보이며 훨씬 낮은 하드웨어 복잡도를 가진다.

• Nuclear Engineering and Technology
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• 제34권3호
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• pp.187-201
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• 2002

The KN-12 cask is designed to transport 12 PWR spent nuclear fuels and to comply with the requirements of Korea Atomic Energy Act, IAEA Safety Standards Series No.57-1 and US 10 CFR Part 71 for a Type B(U)F package. It provides containment, radiation shielding, structural integrity, criticality control and heat removal for normal transport and hypothetical accident conditions. W.H 14$\times$14, 16$\times$16 and 17$\times$17 fuel assemblies with maximum allowable initial enrichment of 5.0 wt.%, maximum average burn-up of 50,000 MWD/MTU and minimum cooling time of 7 years being used in Korea will be loaded and subsequently transported under dry and wet conditions. A forged cylindrical cask body which constitutes the containment vessel is closed by a cask lid. Polyethylene rods for neutron shielding are arranged in two rows of longitudinal bore holes in the cask body wall. A fuel basket to accommodate up to 12 PWR fuel assemblies provides support of the fuels, control of criticality and a path to dissipate heat. Impact limiters to absorb the impact energy under the hypothetical accident conditions are attacked at the top and at the bottom side of the cask during transport. Handling weight loaded with water is 74.8 tons and transport weight loaded with water with the impact limiters is 84.3 tons. The cask will be licensed in accordance with Korea Atomic Energy Act 3nd fabricated in Korea in accordance with ASME B&PV Code Section 111, Division 3.

• Journal of Nutrition and Health
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• 제50권3호
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• pp.217-224
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• 2017

Purpose: Although it is well known thatmortality and morbidity due to cardiovascular diseases are higher in salt-sensitive subjects than in salt-resistant subjects, their underlying mechanisms related to obesity remain unclear. Here, we focused on salt-sensitive gene variants unrelated to monogenic obesity that interacted with sodium intake in humans. Methods: This review was written based on the modified $3^rd$ step of Khans' systematic review. Instead of the literature, subject genes were based on candidate genes screened from our preliminary Genome-Wide Association Study (GWAS). Finally, literature related to five genes strongly associated with salt sensitivity were analyzed to elucidate the mechanism of obesity. Results: Salt sensitivity is a measure of how blood pressure responds to salt intake, and people are either salt-sensitive or salt-resistant. Otherwise, dietary sodium restriction may not be beneficial for everyone since salt sensitivity may be associated with inherited susceptibility. According to our previous GWAS studies, 10 candidate genes and 11 single nucleotide polymorphisms (SNPs) associated with salt sensitivity were suggested, including angiotensin converting enzyme (ACE), ${\alpha}$-adducin1 (ADD1), angiotensinogen (AGT), cytochrome P450 family 11-subfamily ${\beta}$-2 ($CYP11{\beta}$-2), epithelial sodium channel (ENaC), G-protein b3 subunit (GNB3), G protein-coupled receptor kinases type 4 (GRK4 A142V, GRK4 A486V), $11{\beta}$-hydroxysteroid dehydrogenase type-2 (HSD $11{\beta}$-2), neural precursor cell-expressed developmentally down regulated 4 like (NEDD4L),and solute carrier family 12(sodium/chloride transporters)-member 3 (SLC 12A3). We found that polymorphisms of salt-sensitive genes such as ACE, $CYP11{\beta}$-2, GRK4, SLC12A3, and GNB3 may be positively associated with human obesity. Conclusion: Despite gender, ethnic, and age differences in genetics studies, hypertensive obese children and adults who are carriers of specific salt-sensitive genes are recommended to reduce their sodium intake. We believe that our findings can contribute to the prevention of early-onset of chronic diseases in obese children by facilitating personalized diet-management of obesity from childhood to adulthood.

• Pediatric Infection and Vaccine
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• 제24권2호
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• pp.71-78
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• 2017

목적: 2011년부터 2015년까지 최근 5년간 서울대학교 어린이병원 소아 혈액종양 환자에게 발생한 균혈증의 원인균 분포와 이들의 항생제감수성을 분석하여 경험적 항생제 선택에 실제적인 도움을 얻고자 하였으며 원인균의 분포와 항생제감수성에서 이전 연구와 경향성을 비교하고자 하였다. 방법: 2011년부터 2015년 12월까지 서울대학교 어린이병원에서 입원 치료를 받은 소아 혈액종양 환자들에게 발생한 균혈증에 대하여 의무기록을 후향적으로 분석하였다. 결과: 총 167명의 소아 종양 환자에게 221예의 균혈증이 발생하였고, 229 균주가 분리되었다. 이 중 그람음성균, 그람양성균, 진균이 각각 69.0% (2002-2005년 64.0%, 2006-2010년 63.4%), 28.8%(2002-2005년 31.3%, 2006-2010년 34.6%), 2.2% (2002-2005년 4.7%, 2006-2010년 2.0%)의 분포를 보였다. 그람음성균 중에는 Klebsiella species (53.2%, 84/158), Escherichia coli (19.6%, 31/158), 그람양성균 중에는 Staphylococcus aureus (48.5%, 32/66), viridans streptococci (21.2%, 14/66)가 높은 비율로 분리되었다. 그람양성균의 페니실린, 옥사실린, 반코마이신 감수성률은 각각 13.8%, 54.8%, 96.9% (2002-2005년 16.7%, 51.5%, 95.5%; 2006-2010년 14.3%, 34.1%, 90.5%)이었고, 그람음성균의 세포탁심(cefotaxime), 피페라실린/타조박탐(piperacillin/tazobactam), 이미페넴(imipenem), 겐타마이신(gentamicin), 아미카신(amikacin) 감수성률은 각각 73.2%, 77.2%, 92.6%, 71.0%, 95.2% (2002-2005년 75.9%, 82.8%, 93.4%, 78.4%, 85.8%; 2006-2010년 62.8%, 82.9%, 93.8%, 67.8%, 86.3%)이었다. 본 연구의 원인균 분포 및 항생제감수성률은 과거 연구와 비교하여 차이가 없었다. 전체 환자에서 치사율은 13.1%이었다. 결론: 그람음성균은 소아 혈액종양 환자의 균혈증의 가장 흔한 원인균이다. 균혈증의 원인균과 항생제감수성은 이전 연구들과 다르지 않았다. 연구 결과에 따라 본 연구 기관에서는 예년과 같이 발열을 동반하는 소아 혈액종양 환자에서의 경험적 항생제를 피페라실린/타조박탐으로 투여할 수 있을 것이다.

• 한국멀티미디어학회논문지
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• 제23권1호
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• pp.85-92
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• 2020

This paper analyzes the design and usability of maternal notebook mobile application and suggests the improvement direction of the application. The researcher compared and analyzed the functions of maternal notebook applications, conducted user interviews and expert evaluations. The conclusions of this study are the use of appropriate information volume, proportional screen division focusing on main functions, the use of GNB format of main menus, the prohibition of double menu configuration, the use of color consistent with the image of the service, the use of few font sizes, the use of appropriate colors in typography, the use of rich icons with uniform design, card format, list format, but also timeline and infographic forms that make rich user interface design. Maternal notebook application research is expected to be an important reference for research on similar mobile applications with complex functions such as information provision, user history, and community, along with improved research in healthcare design.

• 한국통신학회논문지
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• 제31권11C호
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• pp.1120-1127
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• 2006

본 논문에서는 타원곡선 암호 시스템(Elliptic Curve Cryptosystem : ECC)을 위한 $GF(2^m)$상의 새로운 워드-레벨 곱셈기를 제안한다. 제안한 곱셈기는 원소표기법으로 가우시안 정규기저(Gaussian Normal Basis: GNB)를 이용하며. [m/w] 클럭 사이클마다 곱셈 연산의 결과를 출력한다. 여기서 w는 워드크기이다. 제안한 워드-레벨 곱셈기를 Xilinx XC2V1000 FPGA칩을 이용하여 구현한 후 기존에 제안된 워드-레벨 곱셈기와 성능을 비교 분석한 결과. 가장 낮은 최대 처리기 지연시간(critical path delay)을 가진다

• 한국환경보건학회지
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• 제38권3호
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• pp.213-222
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• 2012

Objectives: This study was undertaken in order to evaluate by work space zoning and structure the concentrations of biological contaminants in the indoor air of domestic office buildings. Methods: Air samples were collected in the office spaces of 15 office buildings in Seoul from June 28 to July 28, 2011. Prior to the sampling, each office was classified into 'open-plan office', 'cellular office' and 'mixed office' according to the work space zoning. To evaluate the biological contamination of indoor air, total suspended bacteria (TSB), Gram positive bacteria (GPB), Staphylococcus aureus (S.A), Methicillin-resistant Staphylococcus aureus (MRSA), Gram negative bacteria (GNB) and fungi were investigated. During the sampling, temperature, relative humidity and carbon dioxide ($CO_2$) were measured. Results: The TSB concentrations ($GM{\pm}GSD$) were $452({\pm}1.3)cfu/m^3$ in open-plan offices, $366({\pm}1.3)cfu/m^3$ in cellular offices and $287({\pm}1.5)cfu/m^3$ in mixed offices, and there were significant differences between the three groups (p<0.05). The highest concentrations ($GM{\pm}GSD$) of fungi were found in the indoor air of cellular offices $128({\pm}1.0)cfu/m^3$, which was at least three times higher than the concentrations in mixed offices $43({\pm}1.0)cfu/m^3$ (p<0.05). Conclusions: Microbiological contamination in the indoor air of office buildings by work space structure was the highest with the open-plan office layout which includes no high walls or doors separating the occupants.

• 한국환경보건학회지
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• 제42권2호
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• pp.133-140
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• 2016

Objectives: A pilot study was undertaken to assess the bioaerosol levels in restaurants and determine the effects of variations in temperature, relative humidity, and air movement on these levels. It focused on the differences between kitchens and dining areas, as well as between summer and winter. Methods: A field survey was performed in six restaurants. An Anderson type air sampler was used for sampling bioaerosols, such as total suspended bacteria (TSB), Gram-negative bacteria (GNB), Gram positive bacteria (GPB), opportunistic bacteria (OP), Staphylococcus spp., and total suspended fungi (TSF). Results: The average levels of TSB were $1{\times}10^2CFU/m^3$ and of TSF they were $1{\times}10^0{\sim}10^1CFU/m^3$. The kitchens had higher bioaerosol levels compared to dining areas, and summer showed much higher levels than winter. The concentration of OP in summer was more than six-fold that of winter. S. aureus was detected both in kitchens and dining areas, even in winter. The main effect of air movement on TSB levels was significant (p<0.05), as was air temperature, relative humidity and air movement on TSF levels (p<0.05). Conclusion: There was a wide variation in bioaerosol levels among different restaurants. The results indicate that cooking foods may be a key factor affecting bioaerosol levels. The effects of air temperature and relative humidity reveal that bioaerosol levels may vary according to the season. The observation of pathogenic bacteria suggests that the hygiene management of establishments should be improved. Future research is needed to characterize the relation between bioaerosol levels and the occupant density of the dining area.

• 한국통신학회논문지
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• 제31권12C호
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• pp.1297-1308
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• 2006

유한체상의 곱셈은 타원곡선 암호시스템의 구현에 있어 가장 중요한 연산 중 하나이다. 본 논문에서는 가우시안 정규기저를 이용하여, $GF(2^m)$상의 새로운 곱셈 알고리즘 및 VLSI 구조를 제안한다. 제안된 곱셈 알고리즘은 정규기저 원소의 대칭성이용과 계수의 인덱스 변형에 기반하며, 타원곡선 암호 시스템을 위해 NIST(National Institute of Standards and Technology) 및 IEEE 1363에서 권고하는 다섯 가지 $GF(2^m)$, $m\in${163, 233, 283, 409, 571}, 모두에 적용 할 수 있다. 제안된 곱셈알고리즘에 기만한 VLSI 구조는 기존의 $GF(2^m)$상의 정규기저 곱셈기에 비해 속도 혹은 하드웨어 면적에 있어 향상된 성능을 보인다. 또한 본 논문에서는 정규기저 원소의 기본 곱셈 행렬을 쉽게 찾을 수 있는 방법을 제시한다.

• 한국의류학회지
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• 제36권9호
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• pp.966-978
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• 2012

Fashion exhibitions in museums and galleries is a form of fashion communication media. This thesis examines the messages, objects, and space of fashion exhibitions as fashion communication media as well as analyzes the method of fashion communication. This thesis first provides a theoretical study on fashion exhibition and conducts a case study of the 2012 Nora Noh Retro Exhibition La Vie en Rose (2012/5/23-6/2, Horim GNB Gallery, Seoul), dedicated to the first Korean female fashion designer. The message of the exhibition was the fashion philosophy and the fashion style of the designer as well as the intention of the curator. The objects presented were the dresses kept by the loyal customers of the brand, and the homage items by designers of present generation. The space designs of the exhibition were the layout and total coordination of the opening event. The methods of fashion communication for the fashion exhibition, in the case of the La Vie en Rose exhibition, were communicated (1) from the past to the present, (2) from designers to celebrities and (3) from the designer to the celebrity and the viewers. From the past to the present, the designer's style throughout the 60 years of her fashion career is conveyed to the present generation fashion people, in the form of homage designs and collaboration works. From designers to celebrities, her fashion philosophy was delivered in the form of movie and stage costumes. Some present generation celebrities tried reinterpretations of the garment. From the designer to the celebrity and the viewers of the exhibition, the intention of the curator and the designer were individualized and internalized by the viewers.