• 한국통신학회논문지
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• 제26권5B호
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• pp.554-560
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• 2001

통신망의 급격한 발전과 통신 속도의 향상에 따라 암호 알고리듬의 고속화 필요성이 절실하다. 본 논문에서는 LFSR을 고속화하기 위하여 한 클럭에 m번의 이동이 이루어지는 고속 병렬형 PS-LFSR을 제안하였고, 이를 기본으로 다수의 키 수열 발생기를 병렬 연결하여 속도를 개선시킨 병렬형 스트림 암호를 제안하였다. 그리고 병렬형 스트림 암호 예로서 m-병렬 합산 수열 발생기(m-parallel SUM-BSG)를 제안하여 m=8인 병렬 발생기를 세부 설계 예시하였으며, 제안된 발생기는 기존의 비도 수준을 유지하면서 처리 속도를 m배 높을 수 있음을 확인하였다.

• 한국조리학회지
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• 제23권4호
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• pp.116-124
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• 2017

This study was investigated quality characteristics of gluten-free noodles added guar gum and basil seed gum (BSG). Gluten-free noodles were prepared using corn flour and corn starch and added 1% and 2% of guar gum and basil seed gum. Water binding capacity was measured by centrifuge, and moisture content was obtained by moisture analyzer. Color of noodles was measured from the midsection of noodles. Water absorption of noodles was calculated by weight of uncooked and cooked noodles. pH of noodles was measured by pH meter. Texture and tensile strength were obtained by rheometer. SPSS 12.0 program was used for significant differences by Duncan's multiple range test. Water binding capacity of noodles was the highest in 2% basil seed gum but 1% guar gum was the lowest. Moisture content was not different in uncooked noodles, but 1% guar had the highest moisture content in cooked noodles. Water absorption of noodles was high in basil seed gum group. pH of noodles was more increased in guar gum additions than basil seed gum additions. For hardness, control had the lowest as 16.09 N, but 2% guar gum showed the highest as 28.40 N. Tensile strength of noodles was increased by adding gums. These results suggested that 1% basil seed gum could be good materials for manufacturing gluten-free noodles in order to improve quality characteristics.

• 천문학회지
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• 제35권1호
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• pp.9-28
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• 2002

We present UBVI CCD photometry of the stellar contents and globular cluster(GC) candidates in the spiral galaxy NGC 300 in the Sculptor group. Color-magnitude diagrams for 18 OB associations having more than 30 member stars are presented. The slope of the initial mass function for the bright stars in NGC 300 is estimated to be ${\Gamma}= -2.6{\pm} 0.3$. Assuming the distance to NGC 300 of (m - M)o = 26.53 $\pm$ 0.07, the mean absolute magnitude of three brightest blue stars is obtained to be < $M_v^{BSG}$ (3) > = -8.95 mag. We have performed search for GCs in NGC 300 and have found 17 GC candidates in this galaxy. Some characteristics of these GC candidates are discussed.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 하계종합학술대회논문집
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• pp.542-545
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• 1998

This paper presents a new reference voltage generator(RVG) for advanced DRAM's. The proposed RVG with three temperature coefficient is independent of temperature variation, and supply voltage. This is used to shorten leakage current using the boosted sense ground(BSG). This circuit is designed in a 0.8.mu.m nwell CMOS, double-polysilicon, double-metal technology. The simulation resutls in jindependent temperature and supply voltage. In hspice simulation results, temperature dependency of RVG is 130.mu.V/.deg. C and supply voltage dependency is .+-.0.91%, $V_{cc}$ =3.3V.+-. 0.5V.3.3V.+-. 0.5V.

• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 2001년도 춘계학술대회논문집:21세기 신지식정보의 창출
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• pp.77-83
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• 2001

최근 암호학계에는 미국의 AES와 더불어 체세대 유럽 암호 표준화 프로젝트 (NESSIE)가 진행 중에 있다. 이 프로젝트의 동기식 스트림 암호 분야에서는 호주의 Simpson이 제안한 LILI-128 암호를 포함하여 6개의 후보가 제안된 상태이며, 상기 알고리즘들은 고속화를 위하여 병렬 형태로 설계 개념을 채택하려하고 있다. 본 논문에서는 스트림 암호의 고속화 설계 방안인 병렬 이동형 PS-LFSR의 구조를 살펴본 다음 여러 가지 형태의 비선형 결합함수에 대한 효율적인 구현 방안을 제안하였다. 즉, 비메모리-비선형 결합함수, 메모리-비선형 결합함수, 비선형 필터함수, 클럭조절형 결합함수 등 4가지 형태의 출력함수 형태에 대한 효율적인 병렬 구현 방안을 제안하였고, 합산 수열 발생기의 병렬구현 기법과 클럭조절형 LILI-128의 병렬구현 기법을 예시하여 안전성과 성능을 분석하였다.

• ETRI Journal
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• 제35권4호
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• pp.632-637
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• 2013

In this paper, we propose a superjunction trench gate MOSFET (SJ TGMOSFET) fabricated through a simple p-pillar forming process using deep trench and boron silicate glass doping process technology to reduce the process complexity. Throughout the various boron doping experiments, as well as the process simulations, we optimize the process conditions related with the p-pillar depth, lateral boron doping concentration, and diffusion temperature. Compared with a conventional TGMOSFET, the potential of the SJ TGMOSFET is more uniformly distributed and widely spread in the bulk region of the n-drift layer due to the trenched p-pillar. The measured breakdown voltage of the SJ TGMOSFET is at least 28% more than that of a conventional device.

• 한국운동역학회지
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• 제31권4호
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• pp.270-275
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• 2021

Objective: The purpose of this study was to evaluate 16 muscles activity according to three exercise intensity when performing Deadlift and Upright row. Method: To accomplish the purpose of the study, subjects (n=10) were performed Electromyography (EMG) measurement for 16 different muscles. The experimental movements were Deadlift and Upright row, measured five times for each intensity (40%, 60%, 80%) of 1RM. This study normalized the EMG values through RVC for comparative analysis. Results: The results were summarized as follows: As a result of Deadlift, there was significant difference in the mean EMG value according to the exercise intensity in all muscles except RA, PM and BB (p<.05). As a result of Upright row, There was significant difference in the mean EMG value according to the exercise intensity in all muscles except BF, TA, GN, RA and UT (p<.05). Conclusion: This study allowed us to know the activities of major muscles according to the exercise intensity for 16 different muscles when performing Deadlift and Upright row.

• 천문학회지
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• 제30권1호
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• pp.27-70
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• 1997

The brightest stars in galaxies have been used as distance indicators since Hubble. However, the accuracy of the brightest stars for distance estimates has been controversial. Recently, Rozanski & Rowan-Robinson [1994 : MNRAS, 271, 530] argued large errors of this method for the distance determination : 0.58 mag and 0.90 mag, respectively, for the brightest red stars and the brightest blue stars, while Karachentsev & Tikhonov [1994 : A&A, 286, 718] suggested much smaller errors in the distance determination than the former: 0.37 mag for the brightest red stars and 0.46 mag for the brightest blue stars. The reasons for these conflicting results are not yet known. In this study we have investigated the accuracy of this method using a sample of 17 galaxies for which Cepheid distances are known and reliable photometry of the brightest stars are available. We have obtained the calibrations of the relations between the mean luminosities of the three blue and red brightest supergiants (BSGs and RSGs, respectively) and the total luminosities of the parent galaxies: $= 0.21M_B^T- 3.84, \sigma(M_v) = 0.37 mag,\;and\;\delta_{\mu0}=0.47$ mag for the brightest red supergiants, and $= 0.30M_B^T -3.02, \sigma(M_B)\;=\;0.55 mag,\;and\; \delta_{\mu0}=0.79mag$ for the brightest blue supergiants. Also it is found that the errors in the distance determination are reduced by a factor of two, as the observing wavelengths increase from B-band to K-band. In conclusion, the brightest red supergiants are considered to be useful for determining the distances to resolved late-type galaxies.

• 한국의류산업학회지
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• 제14권2호
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• pp.261-268
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• 2012

The purpose of this study is to investigate problems of design, fitness, suitability for movement, and wearing comfort of jumper for Korean military tank drivers through analysis of actual wearing condition by questionnaire and field evaluation and to provide basic data for developing its improved design. The survey was done for 477 military tank drivers and evaluation was performed using thermal manikin to measure insulation. The overall satisfaction for design of jumper for military tank driver was over 3.5(likert scale). The overall satisfaction for fitness of jumper for military tank driver was also over 3.5. The satisfactions for material was between 2.39 and 3.13 and the satisfaction for pilling property was the lowest, followed by static property and shape stability after laundering. The satisfactions for movement suitability were standing(3.81), sitting(3,38), raising hand(forward: 2.90, sideward: 3.01), respectively. In insulation evaluation of jumper for military tank drivers and outwears(jacket, jumper), the insulation of jumper for military tank drivers was lower than outwear(jumper) and same with outwear(jacket). The insulation in dynamic and still condition(without wind) of jumper for military tank driver was 0.37clo and 0.31clo, respectively. Its decreation rate in dynamic condition comparing to still condition was 59% which was lower than jacket(0.73clo) and jumper(1.15clo).

• 한국전기전자재료학회논문지
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• 제30권3호
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• pp.139-143
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• 2017

N-type crystalline silicon solar cells have high metal impurity tolerance and higher minority carrier lifetime that increases conversion efficiency. However, junction quality between the boron diffused layer and the n-type substrate is more important for increased efficiency. In this paper, the current status and prospects for boron diffused layers in N-type crystalline silicon solar cell applications are described. Boron diffused layer formation methods (thermal diffusion and co-diffusion using $a-SiO_X:B$), boron rich layer (BRL) and boron silicate glass (BSG) reactions, and analysis of the effects to improve junction characteristics are discussed. In-situ oxidation is performed to remove the boron rich layer. The oxidation process after diffusion shows a lower B-O peak than before the Oxidation process was changed into $SiO_2$ phase by FTIR and BRL. The $a-SiO_X:B$ layer is deposited by PECVD using $SiH_4$, $B_2H_6$, $H_2$, $CO_2$ gases in N-type wafer and annealed by thermal tube furnace for performing the P+ layer. MCLT (minority carrier lifetime) is improved by increasing $SiH_4$ and $B_2H_6$. When $a-SiO_X:B$ is removed, the Si-O peak decreases and the B-H peak declines a little, but MCLT is improved by hydrogen passivated inactive boron atoms. In this paper, we focused on the boron emitter for N-type crystalline solar cells.