• Archives of Pharmacal Research
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• 제27권2호
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• pp.194-198
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• 2004

Reactive oxygen species (ROS) play an important role in the pathogenesis of many human degenerative diseases such as cancer, aging, arteriosclerosis, and rheumatism. Much attention has been focused on the development of safe and effective antioxidants. To discover sources of antioxidative activity in marine algae, extracts from 17 kinds of seaweed were screened for their inhibitory effect on total ROS generation in kidney homogenate using 2',7'-dichlorofluorescein diacetate (DCFH-DA). ROS inhibition was seen in three species: UIva pertusa, Symphyocladia latiuscula, and Ecklonia stolonifera. At a final concentration of 25 $\mu\textrm{g}$/mL, U. pertusa inhibited 85.65$\pm$20.28％ of total ROS generation, S. latiscula caused 50.63$\pm$0.09％ inhibitory, and the Ecklonia species was 44.30$\pm$7.33％ inhibition. E. stolonifera OKAMURA (Lam-inariaceae), which belongs to the brown algae, has been further investigated because it is commonly used as a foodstuff in Korea. Five compounds, phloroglucinol (1), eckstolonol (2), eckol (3), phlorofucofuroeckol A (4), and dieckol (5), isolated from the ethyl acetate soluble fraction of the methanolic extrclct of E. stolonifera inhibited total ROS generation.

• 무역학회지
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• 제45권2호
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• pp.211-228
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• 2020

The purpose of this study aims to analyze the comparative effects of luxury consumption behavior for Chinese consumers. Many research have been conducted in luxury consumption behavior based on perspective of culture, brand, and purchase motives. However, previous studies seem somewhat limited in fully explaining luxury consumption behavior due to less understanding of consumers' psychological trait. In order to fill this gap, this study adopts narcissism (overt narcissism and covert narcissism) to explain consumers' psychological trait. Based on specific psychological trait, consumers would lead to different luxury purchasing behavior depending on purchase motives. Especially, overt narcissism would show high tendency of self-esteem, arrogance, which means that it is closely related to need for uniqueness. Conversely, covert narcissism would show high sensitivity to others, which indicate that it is involved with need for approval. Also, each narcissism would result in different behavior for luxury purchasing based on generation difference (20-30s, vs. 40-50s). The result of this study shows that overt narcissism, covert narcissism, need for uniqueness, need for approval have significant influence on luxury consumption behavior. Especially, overt narcissism has interaction effect with need for uniqueness and young generation (in the 20s, 30s) for luxury purchasing behavior. On the other hand, it was found that covert narcissism has no interaction effect with other variables.

• Journal of Community Nutrition
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• 제7권1호
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• pp.36-41
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• 2005

A convenience samples of Korean-Canadian/American adults who lived in Pacific coast areas, were studied in 2000. Total of 130 adults of 37 ($29\%$) from Vancouver, 45 ($35\%$) from San Jose and 47 ($36\%$) from Los Angeles were analyzed by length of residence, as the shorter residence group resided for less than 20 years and the longer residence group resided for 20 years or more. It was observed that the Korean-Canadians/Americans, who resided there for almost two decades, still kept Korean foods and food-patterns very strongly, even though parents' generation showed less acculturated food patterns than children's generation. In spite of those practices, they gave high values mostly on their dietary acculturation and on educating their children about diets. However the longer residence group showed slightly less positive acculturation attitudes than the shorter one. Therefore the longer abroad seemed to make immigrants more for their children to keep dietary traditions. It is recommended that length of residence should be considered when planning dietary foodservices at nursing care systems for Korean Canadians/Americans.

• 한국콘텐츠학회논문지
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• 제18권5호
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• pp.386-396
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• 2018

본 연구의 목적은 한국 청년 세대의 청년정책에 대한 복지태도에 영향을 미치는 요인을 확인하는 것이다. 분석결과, 한국 청년들의 72.1%가 청년의 자립지원에 대한 책임이 정부에 있다고 인식하고 있었고, 상당수 청년들이 청년지원정책(49.5%)과 일자리지원정책(59.7%)에 대한 지출이 현재수준보다 확대되어야 한다는 태도를 보였으며, 청년수당 제공에 대해서는 24.1%만이 찬성했다. 청년자립지원에 대한 정부책임, 일자리지 원정책에 대한 지출확대에 대해서는 청년 내 집단별 인식 차이가 크지 않은 데 반해, 청년지원정책에 대한 지출확대와 특히 청년수당 지원에 대한 태도에서는 집단별 차이가 상당했다. 청년들은 연령대, 교육수준, 고용상태, 주거형태 등에 따라 상이한 정책 욕구와 인식을 보였다. 한국청년들은 대체로 우리사회가 불평등하다고 인식했는데, 불평등인식수준이 높을수록 청년지원에 대한 욕구와 선호가 높았다. 따라서 향후 청년 정책 수립 시, 청년들이 처한 구체적 삶의 현실과 청년 내부의 이질적 욕구 및 인식수준을 반영한 촘촘한 정책설계가 필요하다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 추계학술대회 논문집 전기물성,응용부문
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• pp.22-24
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• 2003

In this work, in order to investigate the effect of multiple lightning impulse currents on zinc oxide arrester blocks. We have been designed and fabricated a multi-impulse generator which can produce quintuple voltages with $1.2/50{\mu}s$ to 100kV and quintuple currents with $8/20{\mu}s$ to 12kA and we have evaluated the characteristics of zinc oxide arrester block using several electrical and physical methods after the multi-impulse test. It was found that the multi-impulse failures of ZnO arrester blocks were mainly caused by surface flashover and the multi-impulse currents test would be more suitable than single impulse current test in evaluation of the characteristics of zinc oxide arrester blocks corresponding to actual situations.

• 방사성폐기물학회지
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• 제21권4호
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• pp.571-576
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• 2023

The initial development plans for the six reactor designs, soon after the release of Generation IV International Forum (GIF) TRM in 2002, were characterized by high ambition [1]. Specifically, the sodium-cooled fast reactor (SFR) and very-high temperature reactor (VHTR) gained significant attention and were expected to reach the validation stage by the 2020s, with commercial viability projected for the 2030s. However, these projections have been unrealized because of various factors. The development of reactor designs by the GIF was supposed to be influenced by events such as the 2008 global financial crisis, 2011 Fukushima accident [2, 3], discovery of extensive shale oil reserves in the United States, and overly ambitious technological targets. Consequently, the momentum for VHTR development reduced significantly. In this context, the aims of this study were to compare and analyze the development progress of the six Gen IV reactor designs over the past 20 years, based on the GIF roadmaps published in 2002 and 2014. The primary focus was to examine the prospects for the reactor designs in relation to spent nuclear fuel burning in conjunction with small modular reactor (SMR), including molten salt reactor (MSR), which is expected to have spent nuclear fuel management potential.

• 한국의상디자인학회지
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• 제25권1호
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• pp.33-47
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• 2023

In this study, the difference in human body dimensions between the age groups of Generation M (27 to 39 years old) and Generation Z (20 to 26 years old) was analyzed. This study also analyzed if there was a change in the body shape of the MZ generation, who have different sensibilities from the "young people" of the past. In addition, major changes in human body dimensions were carefully analyzed and presented as basic data for clothing design. Therefore, a t-test was performed to verify the significant differences in the measurements of each age group. To examine the change in human body measurements according to the measurement year, the 7th and 8th size Korea data statistics were analyzed. The main required dimensions of clothing design were analyzed graphically for visual changes according to measurement year and age group. As a result of the analysis, Generation Z was found to have a difference in body shape from Generation M, and is generally smaller and slimmer with broader shoulders. In addition, the body shape change between the 7th and 8th measurement periods was significantly higher than the 8th measurement overall. Height has increased and back length has become shorter, resulting in a larger ratio of lower body length. In addition, the proportion of obesity abnormalities has increased. Therefore, since the dimensional system set from the past data can cause problems for the fitting of clothing for the MZ generation, it is necessary to design the clothing and reset the dimensional system making it suitable for the changed the body shape of the MZ generation.

• 한국산학기술학회논문지
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• 제17권6호
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• pp.469-481
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• 2016

최근 우리나라는 가족공동체의 해체 및 고령화 사회 진전, 주거문화의 변화로 1인가구가 급증하고 있어, 주거선택에 있어 일반 가구와는 다른 양상을 보이고 있다. 이에 1인가구 급증에 따른 주택시장의 변화를 진단하고 올바른 정책방향을 제시하는 방안 모색이 필요하다. 이 연구는 성인 1인 단독가구를 대상으로 이들의 주거점유형태에 영향을 미치는 요인이 무엇인지를 밝히고자 함에 그 목적이 있다. 분석은 한국복지패널 제 10차 조사자료를 이용하여 다항 로짓 모형을 통한 횡단면 분석을 실시하였으며, 그 분석 결과는 다음과 같다. 첫째, 20-30대 1인가구는 40대 이상보다 가구 및 주거특성이 더욱 열악하게 나타났다. 둘째, 20-30대 1인가구는 주택 점유형태를 선택할 때 영향을 미치는 가구의 특성은 40대 이상과 같은 특성에 대해서도 다른 방향의 결과를 보였다. 셋째, 20-30대 1인가구의 특성은 공공의 지원을 통해 개선의 여지를 보였다. 이 연구를 통해 정부의 주거 지원이 보다 더 다양한 방식으로 모색되어야 할 필요가 있음을 시사 해 주었다.

• 대한기계학회논문집B
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• 제34권2호
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• pp.145-151
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• 2010

본 연구에서는 지열발전 등과 같은 저온 열원을 에너지원으로 하는 발전에 응용될 수 있는 흡수식 동력 사이클의 출력 최적화를 수행하였다. 이를 위해 정상상태 사이클 시뮬레이션을 수행하여 사이클의 성능을 고찰하였다. 시뮬레이션은 열원과 열침의 입구온도 및 유량을 고정한 상태에서 수행하였으며, 일반적인 발전소의 열원-열침 유량비를 고려하였다. 사이클의 성능은 두 개의 독립변수를 이용하여 나타내었는데, 이는 분리기 입구 암모니아 농도와 터빈 입구 압력이다. 시뮬레이션 결과, $100^{\circ}C$의 지열수와 $20^{\circ}C$의 냉각수(지열수 유량의 5배) 조건에서, 흡수식 동력 사이클을 이용하면 지열수 유량 1 kg/s 당 최대 약 14 kW의 출력을 얻을 수 있음을 보였다.

• 상하수도학회지
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• 제10권3호
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• pp.83-91
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• 1996

The pulverized wastes originated from kitchen garbage grinder cause an additional load in sewage treatment plant and water environment. Therefore, several problems occur in sewer, such as microbial corrosion, odor, psychoda and fly interrupting flow of sewage etc. by their precipitation with earth and sand. This study was conducted on two experiments: hydrogen sulfide gas generation from sediments in sewer and anaerobic batch test. In anaerobic batch test, gas generation was increased when organic compounds were increased in concentration. Sulfide was decreased upon decreasing in sulfate concentration. In $H_2S$ gas generation test along the depth of sediments there were two different sampling sites which are apart from about 50 cm each other in a menhole. The one has the thickness of 55 cm from the surface, the other, of 60 cm. The hydrogen sulfide gas production rates were measured based on ranges from 0 to 10 cm, 10 to 20 cm, 20 to 30 cm for two samples. The results obtained were 1.08, between 0 to 10 cm in depth for the sample thickness of 55 cm and 3.07, 5.36, $5.42{\mu}g/g-VS{\cdot}hr$ in order of depth for the sample thickness of 60 cm, respectively.