• Korean Journal of Food Science and Technology
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• v.27 no.6
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• pp.834-838
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• 1995

The relative retrogradation of Jeungpyun investigated with different milling methods of rice flour. The relative retrogradation of Jeungpyun was reduced in order that of W-C, W-P, D-M, D-J in DSC(Differential Scanning Calorimetry) method while W-C, D-M, D-J, W-P in Diastase method. In wet milling method, the relative retrogradation of Jeungpyun by pin mill (W-P) was lower than Jeungpyun by colloid mill (W-C). In dry milling method, the relative retrogration of Jeungpyun by jet mill (D-J) was lower than Jeungpyun by micro mill(D-M). The relative retrogradation of Jeungpyun by DSC method was similar to the diastase method. The relative retrogradation of Jeungpyun was decreased with decreasing particle size and setback value for amylogram and increasing damaged starch.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2017.05a
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• pp.172-178
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• 2017

Thermal property is one of the important characteristic in the field of energetic materials. As the energy material is released during decomposition, DSC(Differential Scanning Calorimetry) is frequently used for the thermal analysis. In case of the dynamic DSC measurements, thermal dynamic change like melting is prevented from the thermal property measurements. And due to the predicting kg scale, the conditions of the heat exchange with the environment significantly is changed. In this study, As the method to resolve the problem, we predict the thermal aging property using the AKTS thermokinetic program from DSC measurements which performed isothermal method. Predicting the thermal aging properties from ARC(Accelerating Rate Calorimetry) measurement, we compare two results.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.4
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• pp.139-146
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• 2008

Conductors in overhead transmission lines are exposed under various environmental conditions for a long period of time, so that they may be slowly degraded due to air pollutant or thermal history. Aged conductors may reduce power system reliability and public safety. Therefore, diagnosis of aged conductors in service becomes more important concerns with respect to keeping power delivery stable with a proper capability, replacing aged conductors, or constructing a new line. In this paper, we posed a new method to diagnose the refurbishment life and estimate the remaining life of aged conductors by measuring dips. As analyzing some relations of conductor temperature, conductor current, and tension load, it could be verified that dip exactly shows mechanical tension loss for aged conductor. Based on several simulation results, it was shown that the proposed method may be effectively used to diagnose the refurbishment life or remaining one of overhead conductors.

• Korean Journal of Food Science and Technology
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• v.29 no.3
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• pp.464-469
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• 1997

Rapid visco-analyzer (RVA) and differential scanning calorimetry (DSC) were used to study the effect of rice bran dietary fiber extract on gelatinization and retrogradation of wheat flour. The addition of rice bran dietary fiber extracts from various heat treated bran into wheat flour caused to increase the pasting temperature, peak viscosity and final viscosity of RVA measurements. For gelatinization measured with DSC, mixtures of wheat flour and rice bran dietary fiber extract had slightly higher To (onset temperature) and Tp (peak temperature) values than those of control (wheat flour), and wheat flour/defatted rice bran dietary fiber extract mixture had the lowest enthalpy value. In comparison with gelatinization, the retrogradation endotherm of mixtures stored at $4^{\circ}C$ up to 4 weeks occurred at about $20^{\circ}C$ lower temperatures than gelatinization endotherm with broader shape and well-defined thermograms with storage time. The retrogradation of wheat flour was retarded greatly by addition of rice bran dietary fiber extract, and there was no big difference between 5% and 10% additions.

• The Journal of the Korea Contents Association
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• v.21 no.12
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• pp.408-422
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• 2021

In this study, the relationship between trust and purchase intention, which is an outcome variable, was empirically verified by discovering the trust-forming factors of anti-aging products and developing measurement variables. In addition to the existing trust-forming factors such as perceived quality, perceived reputation, brand recognition, and customization, a newly discovered factor is 'accredited certification'. Since the anti-aging industry in Korea is an industry that directly affects consumer health, it was determined that the existing trust-forming factors had limitations in building consumer trust, and a new measure was discovered. This study conducted a survey on anti-aging product consumers and analyzed the solidity and relationship of the questions. As a result of the analysis, it was found that perceived quality, brand recognition, customization, and accredited certification among the anti-aging product trust-forming factors had a positive (+) effect on trust, and perceived reputation had a negative (-) effect on trust. appeared to affect It was found that there was a positive (+) effect between trust and purchase intention, which are the trailing variables. This study proved the meaningful relationship between trust-forming factors and trust by strategically developing and empirically and practically examining meaningful and effective trust-forming factors and measurement items. At the same time, this study is expected to significantly contribute to the establishment of marketing strategies related to anti-aging products in the future by discovering key factors for forming trust that are important for marketing in the anti-aging industry.

• Journal of the Korean Society of Propulsion Engineers
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• v.24 no.2
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• pp.14-27
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• 2020

Differential scanning calorimetry and numerical analysis were performed to estimate the performance degradation and ignition characteristics of the pyrotechnic device due to aging. The reaction kinetics extracted from the calorimetry are implemented into the numerical simulation of the igniter and the pyrotechnic delay, subjected to natural, thermal, and hygrothermal aging conditions. Also, combustion experiments are conducted to confirm that aging due to moisture is a major cause of performance failure of the pyrotechnic device as shown from the present numerical simulations.

• 한국노년학
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• v.30 no.3
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• pp.743-757
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• 2010

Theory of mind (ToM) is the ability to infer one's own and other people's mental states such as beliefs, desires, and intentions. Although the majority of research in ToM has focused on young children or autistic individuals, several studies have investigated ToM in normal old age and in the demented elderly. This article provides an overview on existent findings of theory of mind in aging populations and suggests future directions for research including applying neuroimaging techniques and real-life tasks. It is still unclear how ToM in aging is associated with other aspects of cognition. However, it is expected that ToM perspective on aging will increase our understanding of aging of cognition and social functioning.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.04a
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• pp.815-818
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• 2014

영상 분석을 통한 특징 추출은 객체의 인식이나 매칭, 인덱싱 등을 위해 수반되는 준비 단계로서 분야별로 다양한 방식을 통해 수행되어 왔다. 특히, 피부 영상 분석에 있어 주목할 만한 이슈는 피부의 노화 정도를 측정하는 것이다. 피부의 거칠기는 피부의 상태와 노화를 판단하는 중요한 근거의 하나이다. 본 논문에서는 피부 나이를 측정하기 위해 피부 현미경 영상에서 피부 거칠기를 평가하는 방법을 제안한다. 이를 위해 피부 현미경으로 촬영된 이미지에 이진화 및 질감 대비 향상, 노이즈 제거 등의 전처리 과정을 수행하고, Watershed 알고리즘과 외곽선 검출을 통해, 피부를 구성하는 셀들의 영역 정보를 획득한다. 이를 바탕으로 피부 거침의 변화량을 계산하여 거칠기를 정의한다. 제안한 방법의 효과를 검증하기 위해 다양한 연령대의 피험자로부터 피부 현미경 영상을 확보하고 실험을 통해 피부 거칠기 특징이 피험자의 연령대와 상관관계가 있음을 보인다.

• The Journal of the Korea Contents Association
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• v.19 no.10
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• pp.69-83
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• 2019

Considering the reality that the baby boom generation which takes up 15% of the Korean population enters the old age, this study aimed to investigate level and factors affecting successful aging of the baby boom generation. The theory this study used is Rowe & Kahn, and the data it used are from 2,577 persons combining respondents of the fifth basic survey and the special survey of Korean Longitudinal Study of Ageing. This study utilized IBM SPSS Statistics ver. 20.0 for analysis, and the main results of this study were as follows. First, successful aging level of the baby boom generation was $6.36{\pm}1.39$(range: 0~9), proving that they consider their aging as successful. However, depending on sub-factors of successful aging, proportion that they viewed themselves as successfully aging were quite different. Second, examination of factors affecting successful aging of the generation found out that pocket money, educational level, and child-parents relationship satisfaction are important. By applying the theory of Rowe & Kahn which can be called the representative model of successful aging, this study examined successful aging and extracted some suggestions for future researches.

• Food Science and Preservation
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• v.10 no.4
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• pp.506-511
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• 2003

DSC was used to investigate the thermal mechanism of acorn and corn starch with or without saccharides on gelation and retrogradation. When the samples were starch-saccharide-water system (s-s-w), from measuring of gelation enthalpy and temperatures of initial gelation, peak and conclusion(T$\_$0/, T$\_$p/, T$\_$c/), those of s-s-w system were higher than those of stank-water system (s-w). The retrogradation enthalpy of acorn starch and corn starch was straightly increasing by DSC measurement as storage times. This increase meant slowly becoming recrygtallization of amylopectin. In retrogyadation process, the starch-saccharide-water system's enthalpy was also increased. After 7 days went, the value of the enthalpy was steady. Saccharides were retarding retrogrodation because of stopping the recrystallization of amylopectin. Especially in using fructose and maltose, the retrogradation effect of maltose was well. These elements took effect the number of juntion zone, one of equatorial OH and dynamic hydration number. As these three elements were increasing, a starch-Rel-system was stabilizing.