• 한국식품조리과학회지
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• 제21권4호
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• pp.514-527
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• 2005

The purposes of this study were firstly to optimize the recipe for iced cookies by cooking with five different ingredient levels of $Jinuni\;bean(X_1),\;butter(X_2)\;&\;sugar(X_3)$ and secondly to analyze the chemical and sensory test results by using RSM(Response Surface Methodology). As a result of this test, water activity decreased with increasing contents of butter or sugar, while hydrophilic browning decreased independently with increasing sugar content. There was a positive correlation(p<.001) between specific gravity and hardness, although the result was not uniform due to the interaction of each factor. There was a negative correlation(p<.001) between the spread ratio and gravity or hardness, and it tended to increase with increasing each content. Color value L and color value a had positive correlation (p<.001) and the value tended to decrease with increasing the quantity of Jinuni bean. Generally, the strength of the cookies showed a saddle point at the peak of the 3d graph. As a result of sensory evaluation, the color was sensitive to the contents of sugar and Jinuni bean, the texture was sensitive to the contents of butter and sugar, and the taste and overall quality were sensitive to all three factors. Color had a positive correlation(p<.05) with the taste, texture and overall quality. There were high positive correlations(p<.001) between the taste, texture and overall quality. The preference data showed an up-swollen, parabolic shape in the center of the 34 graph, which enabled the optimum value to be determined and the optimum mixture ratio which fulfilled all sensory items was Jinuni bean 93g, butter 188.5g and sugar 155g, indicating a substitution of flour by $44\%$.

• 정보보호학회논문지
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• 제15권2호
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• pp.81-94
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• 2005

최근 무선랜 환경을 우리 근체에 널리 퍼져있고 많은 사람들이 FDA를 비롯한 multimedia application들과 같은 휴대장치를 많이 사용함으로써 단말 장비들의 이동이 계속 늘어나고 있다 그러나 이러한 단말 장비들이 이동하여 현재 접속되어 있는 AP(Access Point)를 벗어나 다른 AP와 접속을 시도할 때 두 AP들 사이에는 핸드오프 지연이 발생한다. 이러한 핸드오프 지연을 줄이기 위해 이 논문에서는 효과적인 데이터 구조를 사용하는 WFH(Weighted Frequent Handoff)를 제안한다. WFH는 FHR(Frequent Handoff Region)에서 클라이언트의 이동확률 개념을 도입한 새로운 cache replacement algorithm을 사용하여 cache hit ratio를 높이고 토폴로지에서 불필요하게 중복되는 트래픽도 줄여준다. 이 알고리즘은 QoS를 기반으로 하는 클라이언트의 레벨과 이동 패턴에 따라서 인종되는 범위가 달라지는 FHR과 네트워크 이동 토폴로지를 동적을 캡처하는 neighbor graph을 이용하고 있다.

• 보존과학회지
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• 제33권2호
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• pp.75-83
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• 2017

본 연구는 고대 제철로 재현실험의 제련 슬래그를 대상으로 성분을 분석하고, 기존의 연구방법 대신 슬래그의 주성분에 대한 다른 성분들의 상대적인 비율을 활용한 해석 방법을 제시하여 슬래그 간의 경향성을 파악함으로써 노(爐)내에서 슬래그가 기인된 성분 출처를 연구하고자 하였다. 분석 데이터를 이변량 및 삼각좌표 비교 분석 그래프로 작성한 결과 기준시료의 주요 성분에 따라 일정한 경향성을 띠며 그룹을 형성하는 것이 확인되었다. 기준시료인 광석을 중심으로 형성된 광석 슬래그군은 CaO와 $TiO_2$함량이 높았고, 점토와 마사토를 중심으로 형성된 점토 슬래그군은 $Al_2O_3$와 $SiO_2$함량이 높았다. 또한 그래프 상에서 군집에 속하지 못하는 경우 어느 군집에 더 근접한가에 따라 슬래그가 기인한 성분의 추정이 가능한 것으로 판단하였다. 실험에 사용된 광석 및 점토, 첨가제와 제련 슬래그에서 공통적으로 $TiO_2$함량이 1.6% 이상으로 비교적 높게 나타났고, 모든 슬래그 분석 결과에서 $CaO/SiO_2$값이 0.4 이하로 분석되었다. 복원실험이 철광석 제련이었다는 점과 조업 시 조재제를 첨가하지 않았다는 것을 고려했을 때, 슬래그를 해석하는데 있어 단순 함량보다 성분 간 비율을 종합적으로 파악하는 방법이 더욱 정확한 해석 방법이 될 수 있을 것으로 판단된다.

• 한국안전학회지
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• 제6권3호
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• pp.21-26
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• 1991

In this study, a crack closure behavior of Al-alloy 5052-H38 was investigated. The fatigue test was performed by the four-point bending test under the contast amplitude load. Stress ratio R was changed from-1.0 to 0.5. To mcasure the fatigue crack opening point, the graph of load vs. subtracted displacement by computer program was obtained from the X - Y plotter. In order to gain the displacement data, a strain gage was attached at the back surface against the notched side. Uslng the conception of crack closure and influence of on crack growth rate a model for crack growth rate is developed for Al-alloy 5052-H38.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 춘계학술대회논문집
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• pp.1177-1180
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• 2007

This paper has the objects of deciding dynamic instability regions of thick plates by finite element method and providing kinematic design data for mats and slabs of building structures. In this paper, dynamic stability analysis of tapered opening thick plate is done by use of Serendipity finite element with 8 nodes considering shearing strain of plate. To verify this finite element method, buckling stress and natural frequencies of thick pate with or without in-plane stress are compared with existing solutions. The results are as follow that this finite element solutions with $4{\times}4$ meshes are shown the error of maximum 0.56% about existing solutions, and obtained dynamic instability graph according with variation of opening positions.

• 한국항공운항학회지
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• 제15권4호
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• pp.1-8
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• 2007

Spray characteristics of a unlike triplet injector were investigated experimentally. Spray images and SMD of droplet were measured to evaluate the spray characteristics injected by liquid/gas combinations. G-L-G(Gas-Liquid-Gas), L-G-L(Liquid-Gas-Liquid) type of injector were used by changing the gas and liquid feed lines. The SMD graph shows that the droplet sizes decrease in the out of radial direction at a fixed gas Reynolds number. The SMD value of decreasing tendency shows that the more ethyl alcohol ratio increase, the more SMD value decrease.

• 센서학회지
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• 제21권5호
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• pp.324-328
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• 2012

In the past a few decades, various kinds of cells have been examined in laboratories all over the world, and their interesting results have been expressed through various methods in journal publications. For a representative example, the increment or reduction of cell numbers during a bio-related experimental process has been demonstrated using the hazard ratio in survival analysis or in the form of a graph. In addition, the condition of cells such as their normality or abnormality would be indicated by the images of the cell nuclei or membranes treated with proper fluorescent labeling. However, the above methods seem to not be quantitative but rather qualitative assessments, which might be difficult to provide people with the eidetic understanding through parameters or numerical data. With adequate suggestions on any indices enabling the explanation for cell conditions, some analyses may be underestimated due to the lack of objectiveness caused by merely linguistic evaluation for the cell conditions, not numerally scientific interpretation. Therefore, in this study, we would suggest some indices enabling quantitative analysis on the cellular conditions.

• Journal of information and communication convergence engineering
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• 제17권2호
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• pp.142-148
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• 2019

Relatively few countries provide separate bicycle lanes for cyclists. Hence, tools for suggesting cycling routes are essential for a safe and pleasant cycling experience. This study aims to develop a mobile application to build cycling routes based on user preferences, specifically location, search radius, ride distance, and number of optimal routes. Our application calls the Strava API to retrieve Strava cycling segments crowdsourced from the cycling community. Then, it creates a graph consisting of the start and end points of these segments. Beginning from a user-specified location, the depth-first search algorithm (DFS) is applied to find routes that conform to the user's preferences. Next, a set of optimal routes is obtained by computing a trade-off ratio for every discovered route. This ratio is calculated from the lengths of all segments and the lengths of all connecting paths. The connected routes can be displayed on a map on an Android device or exported as a GPX file to a bike computer. Future work must be performed to improve the design of the user interface and user experience.

• The Journal of Advanced Prosthodontics
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• 제9권2호
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• pp.93-98
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• 2017

PURPOSE. The purpose of this study was to compare the width ratio of maxillary anterior teeth according to age in the Korean population and to evaluate the maxillary central incisor width-to-length (W/L) ratio, given differences in age and gender. MATERIALS AND METHODS. Ninety-three Korean adults were divided into 3 groups (n = 31) by age. Group I was 20 - 39 years old, Group II was 40 - 59 years old, and Group III was over 60 years of age. After taking an impression and a cast model of the maxillary arch, the anterior teeth width ratio and central incisor W/L ratio were calculated from standard digital images of the cast models using a graph paper with a digital single lens reflex (DSLR) camera. The calculated ratios were compared among all groups and central incisor W/L ratio were analyzed according to age and gender. All comparative data were statistically analyzed with one-sample t-tests, one-way ANOVAs with Tukey tests, and independent t-tests. RESULTS. No significant differences in maxillary anterior teeth ratios were found among the age groups. The maxillary central incisor W/L ratios in Group III were the greatest and were significantly higher than those in the other groups. The central incisor W/L ratio of men was higher than that of women in Group II. CONCLUSION. Maxillary anterior teeth width ratios were similar in all age groups in the Korean population. The maxillary central incisor was observed as worn teeth in the group over 60 years of age, and a significant difference between genders was found in 40 to 50 year olds.

• 한국정보전자통신기술학회논문지
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• 제10권5호
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• pp.462-468
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• 2017

본 논문에서는 IoT/WSN을 랜덤 기하 그래프를 이용하여 모델링하고 WSN에서 발생되는 데이터를 효율적으로 저장하기 위해 사용되는 지역 부호의 성능을 고찰하였다.. 노드 수가 n=100, 200인 무선 센서 네트워크를 랜덤 기하 그래프로 모델링하여 분산화된 저장 코드의 복호 성능을 시뮬레이션을 통해 분석하였다. 네트워크의 총 노드 수가 n=100일 때와 200일 때 복호율 ${\eta}$에 따른 복호 성공률은 노드 수 n보다는 소스 노드 수 k값에 따라 좌우됨을 알 수 있었다. 특히 n 값에 관계없이 $${\eta}{\leq_-}2.0$$일 때 복호 성공 확률은 70%를 상회함을 알 수 있었다. 복호 율 ${\eta}$에 따른 복호 연산 량을 살펴본 바, BP 복호 방식의 복호 연산 량은 소스 노드 수 k 값이 증가함에 따라 기하급수적으로 증가함을 알 수 있었다. 이는 소스 노드의 수가 증가할수록 LT 부호의 길이가 길어지고 이에 따라 복호 연산량이 크게 증가하는데 원인이 있는 것으로 생각된다.