공간 필터를 이용한 심자도 신호에서의 자기잡음 제거

이하나,김기왕,이수열,조민형,허영,Lee, Hana,Kim, Ki-Wang,Lee, Soo-Yeol,Cho, Min-Hyung,Heo, Young 대한의용생체공학회 2003 의공학회지 Vol.24 No.4

다채널 고감도 자기 센서에 의해 획득되는 심자도 신호는 심전도 신호에 비하여 심장 질환의 진단에 여러 장점을 가지고 있지만 외부 자기 잡음에 의해 쉽게 영향을 받는다는 단점이 있다 외부 자기 잡음은 획득된 신호의 시간적 추이를 분석하여 제거할 수도 있지만, 다채널 시스템에서는 다채널 신호 사이의 공간적 상관 관계에 근거하여 제거하는 방법이 보다 효과 적이다. 된 연구에서는 이러한 방법의 하나로 PCA(Prinicipal component analysis)를 이용하여 구성한 공간 필터로 심자도 신호에서 외부 자기 잡음 성분을 효과적으로 분리해 내는 방법을 제안하였다. 제안한 방법을 61채널 심자도 시스템을 이용해 얻은 정상인 심자도 신호에 적용했을 때 자기 잡음 제거가 효율적으로 이루어짐을 실험적으로 보였다. Even though MCG has many advantages over ECG, MCG signa)s are easily corrupted by external magnetic noises Since multi-channel MCG signals are recorded simultaneously at many spatial positions, it is effective to apply spatial fitters as well as the conventional temporal filters to remove external magnetic noises. The spatial filters can be designed by utilizing the fact that the noise signals caused by external noise sources are more spatially correlated than the original MCG signals. In this paper, we introduce a spatial filtering method for the noise reduction in MCG based on the principal component analysis. Healthy volunteer study results obtained with a 61-channel MCG system are presented.

비공식적 돌봄 자원이 기혼여성의 출산의도에 미치는 영향

이하나,최영,Hana Lee,Young Choi 한국가족학회 2015 가족과 문화 Vol.27 No.2

본 연구는 비공식적 돌봄자원이 기혼여성의 출산의도에 미치는 영향을 살펴보고자 한 연구이다. 이를 위해 본 연구에서는 여성정책연구원의 2011년 제3차 여성가족패널자료 (KLoWF)를 활용하여 20세에서 39세의 가임기 기혼여성 2,001명을 선정하였고, 친정부모와 시부모가 자녀를 위한 비공식 돌봄자원으로 기능할 수 있는지, 그리고 이들 자원의 존재여부가 기혼여성의 자녀출산 의도에 미치는 영향을 기술분석 및 이항로지스틱 회귀분석을 통해 살펴보았다. 분석 결과, 인구사회학적 특징으로는 응답자의 연령, 동거가족원수 등이, 독립변수로 선정한 시부모와의 접근성, 시부모와의 관계성 등이 기혼여성의 출산의도가 유의한 차이를 보 이는 것으로 나타났다. 즉 응답자의 연령이 어릴수록, 동거가족원 수가 적을수록, 시부모와 거주지가 가까울수록, 시부모와 관계가 원만할수록 기혼여성의 출산 의도에 긍정적 영향을 주는 것으로 나타났다. 본 연구는 이러한 연구결과에 따라 몇가지 실천적･정책적 함의를 제시하였다. This study aimed to look at the effects of informal care resources on women’s fertility intension, specially focused on grandparent caregiving role. For this, this study used the 3th National Women and Families Panel(KLoWF) data collected from Korea Women’s Development Institute on 2011. Informal care resource was conceptualized as the physical (residence distance) and psychological(emotional relationship) distance between respondents and their parents. In order to examine the relationship between two variables, logistic regression analysis was performed. The results showed that the residence distance and the relationship between mother-in-law and respondents, the age of respondents, and the number of family living were identified as statistically significant variables in explaining women’s fertility intension. Based on that, several policy and practical implication were suggested.

UVB로 손상이 유도된 인간 피부 섬유아세포(Hs68)에서 일부 식품소재 에탄올 추출물의 피부 보호 효과

이하나(Hana Lee),이종민(Jong Min Lee),홍성문(Sung Moon Hong),김나영(Na Young Kim),손석준(Seok Jun Son),정영재(Young Jae Jeong),이현순(Hyun-Sun Lee),이준수(Junsoo Lee) 한국식품영양과학회 2018 한국식품영양과학회지 Vol.47 No.6

UVB 조사는 MMPs를 활성화시킴으로써 콜라겐을 감소시키고 결과적으로 주름을 형성한다. 본 연구에서는 식품소재 8종을 선정하여 에탄올 추출물을 제조하고 광노화 억제 효능을 평가하였다. 세포독성과 UVB에 대한 보호 효과는 MTT assay를 이용하여 측정하였다. ROS 발생 정도는 fluorescent spectrophotometer로 측정하였으며 수용성 콜라겐과 MMPs의 생성량은 assay kit을 사용하여 측정하였다. Hs68 세포주를 이용하여 50 μg/mL의 농도로 세포독성을 확인하였으며 시료의 독성은 나타나지 않았다. 레드파프리카, 토마토, 호박, 쥐눈이콩(중국산), 밤껍질 에탄올 추출물은 UVB 자극에 대해 각각 88, 104, 98, 97, 88%의 보호효과를 보였다. 이 추출물들은 UVB 조사로 유도된 ROS의 생성량을 감소시켰으며 콜라겐 생성량을 증가시켰다. 또한, 추출물들은 UVB 조사에 의한 MMP-1과 MMP-3의 증가를 억제했다. 그중 밤껍질이 UVB로 유도된 MMPs의 생성을 가장 효과적으로 감소시켰다. 결론적으로 본 연구를 통해 밤껍질 추출물은 자외선에 의한 피부노화와 주름 생성을 효과적으로 개선할 수 있는 가능성을 가짐으로써 항노화 및 항주름 소재로 화장품에 활용될 수 있을 것으로 기대된다. Ultraviolet B (UVB) irradiation is a major cause of photoaging and leads to the formation of skin wrinkles by degrading collagen via activation of matrix metalloproteinases (MMPs). In this study, we investigated the protective effects of ethanol extracts from selected food materials against UVB-induced photoaging in human skin fibroblast (Hs68) cells. The protective effects of the samples on cell viability were examined by MTT assay under UVB (30 mJ/cm2)-treated and untreated conditions. Intracellular levels of reactive oxygen species (ROS) were determined by using a fluorescent spectrophotometer. The levels of MMPs and collagen were measured by assay kits. The extracts (50 μg/mL) did not show any cytotoxicity. Extracts from red paprika, tomato, pumpkin, chestnut shell, and Jinuni bean showed protective effect against UVB irradiation (88, 104, 98, 97, and 88%, respectively). These extracts reversed elevation of ROS production and prevented reduction of collagen levels. Moreover, the extracts inhibited elevation of MMP-1 and MMP-3 levels caused by exposure to UVB irradiation in Hs68 cells. Among the samples tested, chestnut shell was found to exhibit the strongest inhibitory effect against elevation of UVB-induced MMPs. Taken together, these data suggest that chestnut shell is the most promising food material for treatment of UVB-induced photoaging in cosmetic products.

Planterior Lifestyle Shop ‘Half Studio’

Hana Lee(이하나) 한국디자인학회 2018 한국디자인학회 국제초대전도록 Vol.2018 No.11

ReVibe: 순차적 패턴 생성 기반 점자 디스플레이 디자인

이하나(Hana Lee),홍정민(Jeongmin Hong),유정연(Jeongyeon Yoo),이정수(Jeongsoo Lee),고민삼(Minsam Ko) 한국HCI학회 2019 한국HCI학회 학술대회 Vol.2019 No.2

점자 디스플레이는 정보를 점자로 변환해 주는 기술이다. 대부분 점자 디스플레이는 일반 점자 인쇄물과 유사하게 한 글자를 표현하는 점자 셀을 여러 개 두는 배열 방식의 디자인을 채택하고 있다. 본 논문은 단일 셀 방식의 점자 디스플레이 디자인인 ReVibe 와 그 프로토타입을 소개한다. ReVibe 는 단일 셀 방식을 사용하기 때문에, 배열 기반 디자인에 비해 크기, 무게, 전력 소비, 비용 등의 측면에서 유리한 장점이 있다. 특히 ReVibe 는 실제로 사용자는 점자 셀에 계속 손을 올리고 있지만, 마치 손을 움직이며 점자를 읽는 평소와 같은 느낌을 줄 수 있도록 순차적 점자 패턴 생성 기술이 적용되었다.

1970년대 한국의 이상적 여성상과 패션

이하나 ( Hana Lee ),이예영 ( Yheyoung Lee ) 한국의류학회 2015 한국의류학회지 Vol.39 No.5

This study examined the ideal image and fashion of Korean women in the 1970s from a socio-cultural context. This study used information on the 1970s politics, economy, and culture provided by『Chosun Ilbo』and 『Yosungjungang』as well as their presentation of the ideal image and fashion for Korean women in the 1970s. The ideal image and fashion of women were considered from the viewpoint of Hamilton``s Meta-theory. The ideal image of women in the 1970s is divided into two aspects. The image from the traditional Confucian perspective was prevalent and restricted the lives of women to housekeeping chores. On the contrary, women have increasingly participated in society vis-a-vis education and employment opportunities to present a progressive image of women. These aspects coexisted during the turmoil of social change. Progressive women had money to buy clothes because they were economically independent. These women embraced styles that included mini, midi, maxi, and bell-bottom pants. Further, pants were developed into different styles such as pant suits. T-shirts and blue jeans as casual wear were very popular among the youth. At the end of the 1970s, the tailored look and the big look (which copied men``s clothing) were in fashion. Masculine styles such as wide shoulders with pads and neckties strengthened gender equality. Other fashions were dominated by feminine styles described as beautiful, sweet, and elegant that reflected Korean society``s tendency to regard women as sex objects. Clothing that exposed the body highlights this sexual objectification aspect. Women wore miniskirts, hot pants, and bikinis because they wanted to enhance their sex appeal, propagating the view of women as sex objects. In conclusion, all aspects of society and culture were closely interrelated with a fashion style that reflected the values of those aspects.

중년 1인가구와 다인가구의 건강행태 및 질병 이환 비교

이하나 ( Lee Hana ),조영태 ( Cho Young-tae ) 한국보건사회연구원 2019 保健社會硏究 Vol.39 No.3

이 논문은 증가하는 중년 1인가구의 건강상태 파악에 주목한다. 특히 중년 1인가구의 건강행위 및 질병 이환을 다인가구 중년과 비교하는 것을 목적으로 한다. 이 논문에서는 중년 1인가구의 건강행태 및 질병 이환이 다인가구 중년보다 취약할 것이라고 가정하였다. 중년 1인가구와 다인가구 중년의 건강행태 및 질병 이환을 비교하기 위하여 2008년, 2012년, 2016년 지역사회건강조사자료를 활용하였다. 우리나라 중년 40~50대를 대상으로 인구사회학적 특성, 건강행태 및 질병 이환 관련 특성을 연도별로 카이제곱 검정을 통해 비교하였다. 또한 인구사회학적 변수들을 통제하여 로지스틱 회귀분석을 시행한 결과, 흡연과 음주에서는 모든 연도에서 유의하게 중년 1인가구의 행태가 다인가구의 중년보다 취약한 것으로 나타났다. 그러나 주관적 건강상태가 보통이상으로 좋은 중년1인가구의 오즈비는 다인가구에 비해 연도별로 모두 높은 것으로 밝혀졌다. 본 연구를 통해 최근 증가하는 중년 1인가구의 건강행태를 연도별 흐름에 따라 파악하여, 이들 집단의 취약점과 건강 행태 특성의 변화를 세부적으로 확인하려고 한다. 또한 중년 1인가구를 남성과 여성으로 나누어 성별에 따라 건강행태와 질병이환의 차이를 확인하고자 한다. 본 연구를 활용하여 우리나라의 중년 1인가구를 위한 건강관련 프로그램 및 정책을 보다 효과적으로 구축할 수 있을 것이다. The main purpose of this study was to compare health behaviors and disease prevalence between middle-aged one-person households and multi-member households in South Korea. This study used the 2008, 2012, 2016 data from the Korean Community Health Survey (KCHS). A total of 249,416 people aged 40-59 were included in this study. The data was analyzed by using method for complex samples for each year. Descriptive statistics and Chi-square test were used to compare socio-demographic characteristics, perceived health (subjective health status and mental health), health behaviors and disease prevalence between middle-aged one-person households and multi-member households. Logistic regression was applied with sample weights and performed in order to compare health status such as health behavior, perceived health and disease prevalence of two groups. The odds ratios (ORs) of health behavior of middle-aged one-person households which showed 1.44 (1.19-1.74) in 2008, 1.33 (1.11-1.59) in 2012, 1.40 (1.22-1.59) in 2016 for the smoking, significantly higher in total years when compared to multi-member households. The ORs for the drinking were significantly higher for middle-aged one-person households―1.43 (1.27-1.62) in 2008, 1.32 (1.17-1.50) in 2012, 1.41 (1.24-1.60) in 2016―than for multi-member households. The findings from this study can be used as essential information for establishing preventive policies for middle-aged one-person households.

곡류 및 두류 에탄올 추출물의 항산화 및 항당뇨 효과

이하나(Hana Lee),유명남(Myeongnam Yu),김현주(Hyun-Joo Kim),성지혜(Jeehye Sung),정헌상(Heon Sang Jeong),이준수(Junsoo Lee) 한국식품영양과학회 2020 한국식품영양과학회지 Vol.49 No.4

본 연구에서는 곡류 및 두류 에탄올 추출물의 항당뇨 활성과 항산화 활성을 측정하여 상관관계를 분석하고자 하였다. 총폴리페놀 함량은 6.57~242.30 mg GAE/g residue, ABTS라디칼 소거능은 5.03~408.88 mg TEAC/g residue, DPPH 라디칼 소거능은 1.50~313.09 mg TEAC/g residue, 환원력은 0.07~1.14로 측정되었으며, 가장 높은 것은 곡류 중 수수, 두류 중에서는 팥이었다. α-Glucosidase 저해 활성을 분석한 결과 수수는 10 mg/mL의 농도에서 품종과 관계없이 100%에 가까운 수치가 나타났으며, 기장(P-01)이 29.1%, 팥(A-01)이 27.5%로 측정되었다. 간세포의 포도당 흡수율도 α-glucosidase 저해 활성과 유사하게 수수(S-01, 02, 03) 10 μg/mL의 농도에서 약 55~64%로 가장 높았으며 양성대조군인 metformin(100 μM)의 활성과 비슷한 효과를 나타내었다. 기장(P-01, 02)은 약 37~39%, 팥(A-01)은 35%로 측정되었다. 항산화 활성과 항당뇨 활성은 유의적인 양의 상관관계(R2=0.628~0.956)를 보였다. 결론적으로 효과가 가장 높았던 수수 에탄올 추출물은 당뇨병을 효과적으로 개선하는 천연 소재로 이용될 수 있을 것으로 기대된다. Overproduction of free radicals, the endogenous toxins, causes oxidative stress, resulting in type 2 diabetes. Cereal grains and legumes are rich sources of natural antioxidants, possess numerous pharmacological properties with little or no side effects, and protect humans from various metabolic diseases. In this study, we examined the ethanol extracts of cereal grains and legumes for anti-diabetic activity in relation to antioxidant activity. Total polyphenol content of the extracts was in the range of 6.57∼242.30 mg gallic acid equivalent/g residue; 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) and 1,1-diphenyl-2-picrylhydrazyl radical scavenging capacities were 5.03∼ 408.88 and 1.50∼313.09 mg Trolox equivalent antioxidant capacity/g residue, respectively. Among all extracts, the ethanol extract of sorghum showed the highest antioxidant activity followed by that of adzuki beans. Regardless of the variety, α-glucosidase inhibitory activity was the highest in the sorghum ethanol extracts (97∼100%) followed by those of proso millet (29.1%) and adzuki bean (27.5%). Glucose consumption rate of the sorghum ethanol extract at a concentration of 10 μg/mL was comparable to that of 100 μM metformin. Significant correlation was observed between anti-diabetic and antioxidant activities (R2=0.628∼0.956). Collectively, these data suggest that sorghum ethanol extracts are the most promising food substances for treatment or prevention of diabetes through the enhancement of the antioxidant activities.

공공역사 논의의 한국적 맥락과 공공역사가들

이하나(Lee, Hana) 역사비평사 2021 역사비평 Vol.- No.136

This article explores the discussion of “public history”, which has been heating up the history academia recently, in the reality of Korea, not in the theoretical dimension. The historical background behind Korean society’s acceptance of the concept of “public history” is three contexts: popularization of history, paradigm shift in historical research, and the “crisis of history” discourse. In particular, regarding the “crisis of history”, there were two factors that emphasized “the greatness” of ancient history and “the glory” of contemporary history, the “history consumption” problem in the public sphere, which had little to do with historical research, and the employment of historians. This situation was the reason why the introduction of the concept of “public history” was delayed, and at the same time the background that the discussion of public history began in Korea. The concepts of “popularization of history”, “consumption of history”, and “history/cultural content” have served as alternatives to “public history” in Korean society. Public history shows a clear distinction, although there are aspects that share a significant sense of problem with these concepts. This is because it contains concerns and philosophies about the pursuit of “historical publicness” that cannot be found in other concepts. Roughly speaking, public history refers to “practicing and reproducing various history outside of academia”, and public historians are understood as “historical experts and non-professional history lovers who participate in public history.” From this perspective, public history exists in abundance throughout Korean society. The existence and activities of public historians who describe/represent/practice history with their own expertise in the field of public history such as museums, memorial halls, media, schools, communities, and internet spaces where criticism and discourse take place are public history. In the future, discussions on public history should take a step further with specific and critical analyses of various sites that are closely attached to the reality of Korea.

토픽 모델링을 이용한 지속가능패션 연구 동향 분석

이하나 ( Hana Lee ) 복식문화학회 2021 服飾文化硏究 Vol.29 No.4

As interest in the sustainable fashion industry continues to increase along with climate issues, it is necessary to identify research trends in sustainable fashion and seek new development directions. Therefore, this study aims to analyze research trends on sustainable fashion. For this purpose, related papers were collected from the KCI (Korean Citation Index) and Scopus, and 340 articles were used for the study. The collected data went through data transformation, data preprocessing, topic modeling analysis, core topic derivation, and visualization through a Python algorithm. A total of eight topics were obtained from the comprehensive analysis: consumer clothing consumption behavior and environment, upcycle product development, product types by environmental approach, ESG business activities, materials and material development, process-based approach, lifestyle and consumer experience, and brand strategy. Topics were related to consumption, production, and education of sustainable fashion, respectively. KCI analysis results and Scopus analysis results derived eight topics but showed differences from the comprehensive analysis results. This study provides primary data for exploring various themes of sustainable fashion. It is significant in that the data were analyzed based on probability using a research method that excluded the subjective value of the researcher. It is recommended that follow-up studies be conducted to examine social trends.