• 응용통계연구
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• 제34권4호
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• pp.611-622
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• 2021

본 논문에서는 변동성의 비대칭성과 비정상성을 동시에 고려하고 있다. 다양한 변동성 모형을 분석하고 있으며 모수적-붓스트랩을 통한 예측분포를 이용하여 변동성 모형의 예측 성능을 비교하고 있다. 오차항 분포로서 표준정규분포 및 표준화 t-분포를 고려하였으며 1-시차 후 예측과 2-시차 후 예측을 미국의 다우지수 사례를 통해 설명하였다.

• 공업화학전망
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• 제24권6호
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• pp.3-18
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• 2021

가역적인 표면 젖음성의 제어가 가능한 스마트 표면은 첨단 센서, 기능성 멤브레인 등 여러 산업분야에 적용될 수 있는 계면제어 기술로써 많은 관심을 받을 것으로 기대된다. 표면의 젖음성은 표면의 화학적 구조와 기하학적 입체 구조에 의해 영향을 받는 데, 특히 외부자극에 의해 소재 물성을 가변시킬 수 있는 스마트 고분자 소재를 나노구조가 제어된 표면에 도입함으로써 표면의 젖음성을 초발수에서 초친수로 가역적으로 전환시킬 수 있는 스마트 표면을 효과적으로 구현할 수 있다. 자극 응답성 스마트 소재는 인가하는 외부자극에 따라 물리적 자극(빛, 온도, 전기, 자기)과 화학적 자극(pH, 용매, 이온)으로 구분할 수 있으며, 이를 복합적으로 적용한 이중/다중 유발 자극에 반응하는 소재가 있다. 본 기고문에서는 외부자극에 응답하는 자극응답성 고분자를 나노 구조 표면에 도입하여 초발수에서 초친수로의 가역적인 젖음성 변화가 가능한 고기능성 스마트 표면의 최근 연구 동향과 미래 전망에 대해 소개하고자 한다. 이런 다양한 외부자극을 이용한 표면 특성의 가역적 제어 기술을 통해 물-오일의 분리, 바이오센서, 약물 전달, 소프트로보틱스와 같은 스마트 소재의 잠재적 발전 가능성 또한 엿볼 수 있을 것으로 기대된다.

• 한국식품영양학회지
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• 제35권4호
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• pp.268-275
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• 2022

The purpose of this study was to confirm the possibility of using Korean purple yam (Dioscorea alata) as proximate composition, material, and antioxidant activity. In the proximate composition of the freeze-dried purple yam powder, the carbohydrate content was the highest at 86.67%, and in minerals, potassium showed the highest content at 1,765.69 mg/100 g. To study the antioxidant activity of purple yam, distilled water and 70% ethanol were used as extraction solvents. The total polyphenol, total flavonoid, and total anthocyanin contents were 1.3~1.6 times higher in 70% ethanol extract, than in the distilled water extract. As a result of ORAC, DPPH and ABTS radical scavenging activity, SOD activity, and reducing power, the 70% ethanol extract showed higher antioxidant activity than the distilled water extract in all results. As a result of freeze-drying purple yam and measuring antioxidant activity by extraction solvents, it is concluded that purple yam can contribute to the food industry as a natural antioxidant and health functional material.

• Human Ecology Research
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• 제61권2호
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• pp.183-194
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• 2023

The purpose of this study was to examine how sociodemographic status, family-related influences, and perceived future economic prospects were associated with the possibility of getting married and having children in a sample of 607 single young Korean adults. The sample comprised unmarried men and women in their 20s and 30s taken from the 2021 Seoul Family Report survey, and descriptive statistical and multiple regression analyses were conducted on the data. The results indicated that age, non-traditional marriage/childbearing values, parents' marital relationship during childhood, and the prospect of having a stable job and owning a home were significantly related to the possibility of marriage. With regard to the possibility of having children, a significant relationship was found with age, level of education, non-traditional marriage/childbearing values, recognition of the importance of family, parents' marital relationship during childhood, and the prospect of having a stable job and owning a home. The study also examined the importance of policies that make the possibility of marriage and having children more appealing to young unmarried adults in Korea by providing a positive outlook for the economy, a sense of stability, and a supportive approach to the value of having a family.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2021년도 추계학술발표대회
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• pp.868-871
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• 2021

기후, 경영, 경제 등 여러 분야의 회귀분석에서 설명변수가 반응변수에 일정 시차를 두고 영향을 미치는 경우들이 많다. 하지만 지금까지 대부분의 회귀분석은 설명변수가 반응변수에 즉각적으로 영향을 미치는 경우만을 가정하고 있으며, 설명변수와 반응변수 간에 존재하는 시차를 탐색하는 연구는 거의 이루어지지 않았다. 그러나 보다 정확한 회귀분석을 위해서는 설명변수와 반응변수 간에 존재하는 시차를 파악하는 것이 중요하다. 본 논문은 회귀분석 데이터가 주어졌을 때 설명변수와 반응변수 간에 존재하는 시차를 파악하는 딥러닝 모델을 제안한다. 제안하는 딥러닝 모델은 설명변수의 과거 값들 중 어떤 값이 현재 반응변수에 가장 큰 영향을 미치는지를 노드 간 가중치로 표현하고, 회귀모델의 오차를 최소화하는 가중치를 탐색한다. 훈련이 끝나면 이 가중치들을 사용하여 각 설명변수와 반응변수 간에 존재하는 시차를 파악한다. 실험을 통해 제안 방법은 시차를 고려하지 않는 기존 회귀모델에 비해 시차까지 고려함으로써 오차가 1/100 수준에 불과한 더 정확한 회귀모델을 찾을 수 있음을 확인하였다.

• 한국식생활문화학회지
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• 제25권1호
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• pp.54-60
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• 2010

The principal objective of this study was to determine the optimal mixing condition of two different amounts of cabbage and rice flour for the preparation of a cabbage cream soup. The experimental design was based on the central composite design methodology of response surface, which included 10 experimental points, including two replicates for the cabbage and rice flour. Physiochemical and sensory properties were measured, and these values were applied to the mathematical models. A canonical form and perturbation plot showed the influence of each ingredient on the mixed final product. Water content and pH values increased with increasing quantities of rice flour. Neither cabbage or rice flour affected the L and a values, but the b value increased with greater quantity of both ingredients. Viscosity increased with increasing added cabbage. Sensory evaluation results were significant in the predicted model for flavor (p<0.05), concentration (p<0.01) and overall quality (p<0.01). As a result, the optimum formulations by numerical and graphical methods were calculated as 111.79 g cabbage and 8.99 g rice flour.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2008년도 한국컴퓨터종합학술대회논문집 Vol.35 No.1 (C)
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• pp.203-207
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• 2008

본 논문에서는 의료기관의 검사코드인 LOCAL 코드(Local Code)를 LOINC 코드(Local Laboratory Result Code)와 매핑하기 위한 알고리즘을 구현하고, 이를 기반으로, LOCAL 코드의 매핑 및 입력을 지원하는 새로운 시스템을 제안한다. 이를 위해, 먼저, LOCAL 코드를 변환하여 LOINC의 여섯 가지 속성을 추출한 대응 코드로 생성한다. 추출한 대응코드는 LOINC 코드와 매핑하는 키 값이 된다. 대응코드와 LOINC 코드의 매핑은 각 속성을 우선순위에 따라 비교하는 과정을 포함하며, 매핑 결과 수에 따라 자동 매핑되거나, 상 하위 개념을 조합 또는 System 코드를 재검색하는 결과 최소화 단계를 수행한다. 본 연구에서는 매핑 알고리즘을 기반으로 LOINC 코드로 매핑 하고, 새로운 LOCAL 코드를 LOINC 코드로 입력할 수 있는 새로운 시스템을 구축하였다. 본 연구의 목표는 LOINC를 활용하여 방대한 진단검사 결과데이터를 표준화하고, 이를 통해 의료 기관 간 EMR을 실현하고 구축하는 기반요소를 마련하는데 있다. 본 연구를 통해, 국내 의료기관 간 검사 결과의 통합과 호환이 가능하게 할 것이며, 검사코드의 표준화를 위한 기반요소를 마련할 수 있을 것으로 기대한다.

• Human Ecology Research
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• 제61권3호
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• pp.445-458
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• 2023

This study aims to develop and implement a coaching program in the metaverse space to address issues faced by university students during their life stage and verify their effectiveness. The overall program consists of four sessions: "Opening," "Metaverse-based Coaching Clinic (2 sessions)," and "Coaching Clinic Reflection and Feedback." A total of 20 participants were selected through S University's extracurricular program system. To assess the effectiveness of the program, surveys, as well as focus group interviews (FGIs) were conducted. Using SPSS 26.0, significant differences were observed in the participants' career decision self-efficacy and resilience. The FGIs were conducted with a total of four participants divided into two groups, with each group lasting for one hour. The analysis revealed key phases, including the introductory phase comprising participants' motivation and expectations, the main phases consisting of program operation, coaching perception and outcomes, metaverse environment, and metaverse coaching perception and outcomes, as well as the concluding phase in which recommendations are suggested for subsequent programs. The study confirmed the significant impact of coaching in the metaverse space and highlighted the maximization of coaching effectiveness through mutual anonymity facilitated by avatars. This research holds significance as an exploratory study that practically verifies the potential expansion of the metaverse environment in the coaching field.

• 대한영양사협회학술지
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• 제29권4호
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• pp.248-260
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• 2023

This study provides basic data when planning nutrition support for healthy aging by revealing the relationship between various symptoms in the elderly and nutrient intake. From the 8th National Health and Nutrition Examination Survey, data from senior citizens aged 65 years or older in 2021 were used, and answers on the depression prevalence, activity restrictions, complaints of discomfort when chewing, and nutrient intake were analyzed through SPSS multiple logistic regression analysis. In the case of depression, there was a significant effect on the intake of four of the 20 nutrients (water, protein, cholesterol, and vitamin E). When experiencing activity restrictions, the intake of eight of the 20 nutrients (phosphorus, magnesium, vitamin A, vitamin D, beta-carotene, retinol, thiamine, and niacin) was affected. When experiencing chewing discomfort, the intake of three of the 20 nutrients (fat, magnesium, and vitamin E) was affected. Elderly people who suffer from depression, activity restrictions, and discomfort with chewing are at risk of various nutrient deficiencies, and related studies need to be conducted.

• 한국의류학회지
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• 제48권3호
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• pp.511-527
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• 2024

The aim of this study was to impart color to bacterial cellulose (BC) fabric using various natural plant-based dyes-namely, gardenia jasminoides, green tea, and pomegranate peel. A protein pretreatment was also applied to improve the BC fabric's dyeability and mechanical properties. The BC fabric's dyeing and mordanting conditions when using plant-based natural dyes were determined by changes in the K/S values. The dyeability of BC samples dyed with green tea or pomegranate peel improved when they were pretreated with soy protein isolate (SPI) prior to dyeing. Moreover, the SPI pretreatment was efficient in improving the BC fabric's tensile strength and flexibility. This study proposes a method for dyeing BC fabric that uses plant-based natural dyes and confirms the effects of the protein pretreatment on the fabric's dyeability and durability.