• 제목/요약/키워드: LED color

검색결과 749건 처리시간 0.027초

LED 광원이 청치마 상추의 생육 및 무기물 함량에 미치는 영향 (Effect of Light Emitting Diodes Treatment on Growth and Mineral Contents of Lettuce (Lactuca sativa L. 'Chung Chi Ma'))

  • 신용습;이문중;이은숙;안준형;도한우;최돈우;정종도;이지은;김민기;박종욱;엄영철;박소득;채장희
    • 한국유기농업학회지
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    • 제21권4호
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    • pp.659-668
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    • 2013
  • The objective of this study was carried out to elucidate the effect of LEDs (light emitting diodes) irradiation in relation to early growth and inorganic elements in leaf lettuce (Lactuca sativa L. 'Chung Chi Ma'). In morphological changes of leaves, shoot elongation and hypocotyl length showed poor growth in red light irradiation, while the red+blue light irradiation induced shorter plant height and much greater leaf numbers resulting in increased fresh weight. In change of the Hunter's color and SPAD values, lettuce seedlings grown under in red+blue and fluorescent light irradiation had a higher $a^*$ value, otherwise SPAD values were not changed in these light irradiations. Interestingly, relative chlorophyll contents showed 1.8 times increased redness in the treatment of red+blue light irradiation. Inorganic element (N, Ca, Mg, Mn, and Fe) and ascorbic acid contents were increased in lettuce plants grown under LEDs light irradiation compared to those of lettuce grown under the fluorescent light which showed higher P and Mn contents. In conclusion, it is considered that red+blue light irradiation which stimulates growth and higher nutrient uptake in leaf lettuce could be employed in containers equipped with LEDs.

증자 및 건조조건이 올벼쌀의 이화학적 특성에 미치는 영향 (Effect of Steaming and Dehydration Condition on Physicochemical Characteristics of Korean Traditional Parboiled Rice (Olbyeossal))

  • 조용식;이경하;하현지;최윤희;김은미;박신영
    • Journal of Applied Biological Chemistry
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    • 제55권3호
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    • pp.185-189
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    • 2012
  • 증자 및 건조조건을 달리하여 올벼쌀을 제조하고 호화도, 물결합력, 팽윤력, 및 경도 및 관능적 기호도의 변화를 시험하였다. 원료는 동진찰벼를 사용하였으며 탈곡된 벼를 24시간 수침한 다음 $95-100^{\circ}C$에서 60분 또는 $121^{\circ}C$에서 20분간 증자하였고 45, 60, $80^{\circ}C$의 열풍과 햇볕을 이용하여 수분함량 13-15%가 되도록 각각 건조하여 준비하였다. 올벼쌀의 호화개시온도는 생쌀 보다 낮았으며 상압증자 후 $45-60^{\circ}C$의 열풍으로 건조한 올벼쌀은 최고점도, 강하점도, 치반점도, 최종점도가 다른 가공조건에 비하여 높았다. 올벼쌀의 수분결합력과 팽윤력은 고압증자가 상압증자보다 높았으며 건조조건에 따른 유의적인 차이는 없었다. 올벼쌀의 경도는 고압증자조건에서 건조온도가 높을수록 올벼쌀의 경도는 증가하는 경향을 보였다. 올벼쌀에 대한 관능검사 결과는 고압에서 증자한 다음 $45^{\circ}C$$80^{\circ}C$의 열풍으로 건조한 올벼쌀이 외관, 색상, 맛, 전반적 기호도가 우수한 것으로 나타났다. 이와 같은 결과는 증자와 건조조건이 올벼쌀의 품질을 좌우하는 영향인자로서 중요성을 나타낸다.

아르누보와 현대 장신구의 조형성 비교 분석에 관한 연구 (Study on Comparative Analysis of Formativeness of Art Nouveau and Modern Jewelry)

  • 박지원;박승철
    • 디지털융복합연구
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    • 제12권1호
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    • pp.563-572
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    • 2014
  • 아르누보는 예술을 새롭게 개혁하여 젊게 만들고자 하는 목적에서 출발하였다. 역사상의 양식 모방에 반기를 들어 삶과 주변 환경의 총체적 변혁을 포괄하는 현대적이며 시류에 맞는 양식을 요구하는 운동이었다. 장신구 또한 이전의 양식에서 탈피한 새로운 양식을 구축하고자 하였으며 소재와 재료의 새로운 시도와 함께 장인적 기술력이 강조된 섬세한 장신구가 선보였다. 아르누보의 양식은 유럽 전반에 각기 나라의 문화에 맞추어 다양하게 전개되었으며, 짧지만 강렬하게 20세기 이후 양식의 기초가 되었다. 아르누보 이후의 장신구는 산업과 예술 장신구로 나뉘어 발전을 거듭해왔으며 현대에 이르기까지 많은 발전에 영향을 미쳤다. 아르누보는 장신구를 재화의 가치를 넘어서 예술적 가치로서의 확립을 이끌었다. 아르누보의 다양한 조형성을 통해 표현된 심미적 장신구와 생산력과 기능성에 치우친 단조롭고 귀보석 중심의 현대 장신구 디자인과는 차이를 갖는다. 현대에는 개성과 자아표출을 중시하는 문화 예술의 시대로 창의적, 독창적인 디자인을 추구한다. 따라서 시대적 배경과 사상을 통해 표현된 아르누보의 다채로운 색상 표현과 다양한 소재와 모티프의 장신구 양식은 현대 장신구의 새로운 디자인 개발 과 디자인 흐름을 이끌어 가기위한 귀감이 될 것으로 본다.

한국 초등학교의 수학 교과서 체제 변천에 관한 연구 -7차 교육과정 이후 교과서를 중심으로- (A Study on the Changes of Mathematical Textbooks System in Korean Elementary Schools - Focusing on textbooks after the 7th curriculum-)

  • 최혜령;신항균
    • 한국초등수학교육학회지
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    • 제24권1호
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    • pp.109-128
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    • 2020
  • 우리나라는 교육의 핵심을 공교육인 학교 교육에 두고 있으며 교육부가 고시한 교육과정을 토대로 교과서가 편찬되고 있다. 따라서 질 높은 교과서의 편찬은 매우 중요하며 교육과정을 개정하는 일 이상의 정성과 노력이 요구된다. 우리나라도 그 동안 여러 차례 교과서 개발에 힘써왔으나 선진 외국 교과서와 비교해 볼 때 외적 체제나 편집 디자인 면에서 획일적인 교과서라는 평가를 받아왔다. 이는 교과서를 편찬할 때 교과서에서 다루어야 하는 내용인 교과서의 내적 체제에만 편중된 결과의 산물이라 할 수 있다. 이에 본 연구에서는 교과서 역사상 괄목할만한 변화가 있었던 7차 교과서에서부터 2015 현행 교과서에 이르기까지의 우리나라 국정 교과서를 차수별로 살펴보고, 어떠한 변화의 양상을 보이는가에 대해 의미있는 고찰을 하고자 한다. 이를 위해 교과서의 구성 체제를 외적 체제와 내적 체제로 나누어 분석한다. 교과서의 외적 체제는 판형, 자형, 지질, 색상의 변화와 삽화 분량의 변화를 중심으로 살펴보고, 내적 체제는 단원의 구성 체제와 차시의 구성 체제의 변화 및 발문 방식의 변화를 중심으로 살펴봄으로써 교과서의 변화 양상에 대한 유의미한 결론을 도출하였다.

Defect-related yellowish emission of un doped ZnO/p-GaN:Mg heterojunction light emitting diode

  • Han, W.S.;Kim, Y.Y.;Ahn, C.H.;Cho, H.K.;Kim, H.S.;Lee, J.H.
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2009년도 하계학술대회 논문집
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    • pp.327-327
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    • 2009
  • ZnO with a large band gap (~3.37 eV) and exciton binding energy (~60 meV), is suitable for optoelectronic applications such as ultraviolet (UV) light emitting diodes (LEDs) and detectors. However, the ZnO-based p-n homojunction is not readily available because it is difficult to fabricate reproducible p-type ZnO with high hall concentration and mobility. In order to solve this problem, there have been numerous attempts to develop p-n heterojunction LEDs with ZnO as the n-type layer. The n-ZnO/p-GaN heterostructure is a good candidate for ZnO-based heterojunction LEDs because of their similar physical properties and the reproducible availability of p-type GaN. Especially, the reduced lattice mismatch (~1.8 %) and similar crystal structure result in the advantage of acquiring high performance LED devices. In particular, a number of ZnO films show UV band-edge emission with visible deep-level emission, which is originated from point defects such as oxygen vacancy, oxygen interstitial, zinc interstitial[1]. Thus, defect-related peak positions can be controlled by variation of growth or annealing conditions. In this work, the undoped ZnO film was grown on the p-GaN:Mg film using RF magnetron sputtering method. The undoped ZnO/p-GaN:Mg heterojunctions were annealed in a horizontal tube furnace. The annealing process was performed at $800^{\circ}C$ during 30 to 90 min in air ambient to observe the variation of the defect states in the ZnO film. Photoluminescence measurements were performed in order to confirm the deep-level position of the ZnO film. As a result, the deep-level emission showed orange-red color in the as-deposited film, while the defect-related peak positions of annealed films were shifted to greenish side as increasing annealing time. Furthermore, the electrical resistivity of the ZnO film was decreased after annealing process. The I-V characteristic of the LEDs showed nonlinear and rectifying behavior. The room-temperature electroluminescence (EL) was observed under forward bias. The EL showed a weak white and strong yellowish emission colors (~575 nm) in the undoped ZnO/p-GaN:Mg heterojunctions before and after annealing process, respectively.

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여성건강을 위한 개념적 모형 (Conceptual Model for Women s Health)

  • 이경혜
    • 대한간호학회지
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    • 제27권4호
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    • pp.933-942
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    • 1997
  • There has recently been an increased interest in women's health from, various disciplines, with different perspectives presented according to each profession's academic background. This has led to many instances of incorrectly defining, or misinterpretation, of the issues even among professionals. Nurse scholars as well as practitioners who work in women's health care need to have a clear conceptual understanding of women's health in order to build a body of knowledge, delineate curricular activities, and set directions for professional nursing interventions. In addition, a conceptual model that may be directly utilized in practice is needed to maintain and promote women's health issues. The purpose of this study was to apply a Hybrid model, analyzing conceptual definitions and discussions related to women's health gathered from review of the literature. Further to compare analyticals the concepts and properties observed from field work, so as to present a final definition of women's health and, build a conceptual framework for a united comprehensive perspective on the concept as well as on nursing practice. Data collection and analysis consisted of a theoretical stage, field work stage, and final analysis. A heterogeneous group of professionals and lay persons, 39 in all, participated in the field work. Study findings Include several subconcepts under the concept of women's health : a woman's whole life, holistic health, quality of life, awareness of being a woman, individual nursing, self care ability, reproductive health, and family health. Thus, a comprehensive definition was built, 1. e., "Women's health care be defined as improvement in the quality of life of women through attainment of holistic health throughout the life span. With reproductive health at the core, the concept is directly related to family and national health, and includes taking care of one's own health based on awareness of being a woman and utilizing self care activities. Women's health care issues are unique and allow various responses, therefore women's health professionals need to apply individual approaches to reach solutions in attaining holistic health and improving quality of life." The constructual factors of women's health were found to be reproductive functions, diseases more common in woman, self actualization, mental health, women's health policies, sexuality, midlife changes, and marital relations, with each factor having more than three properties. Positive factors affecting women's health were found to be a normal childbearing process, a healthy lifestyle, active health management, health information, support, and resources, and interpersonal relationships. Negative factors were found to be overwhelming role stress, cultural oppression, gender inequality, distorted sexual identity, economic difficulties, misuse and/or abuse of substances, and stress. The model of women's health may be visualized as a balance scale set upon a woman's life, supporting 4 concentric circles. The innermost circle and second circle incorporate conceptual definitions of women's health, and the outer two circles represent the constructional factors and properties of women's health. Each circle has its own color that symbolizes the conceptual meaning. Positive and negative factors are represented as weights at either end of the scale, and are affected by nursing intervention, i. e., health and wellness increase when positive factors are stronger, whereas disease and illness increase when negative factors are stronger. This model is only a preliminary effort and requires much discussion and testing to be further developed. Continuous research is also required.

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A Study on Korean Male Cosmetics Analysed Through The Newspaper Articles From 2000 To 2010

  • An, Jin-Kyung;Hong, Na-Young
    • International Journal of Costume and Fashion
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    • 제11권1호
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    • pp.63-83
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    • 2011
  • This study aims to prove the changes, development and social background of Korean male cosmetics over the period of 2000-2010. There were total 574 articles written about male make-up and cosmetics in Chosun Daily, Joongang Daily and Donga Daily, which are the top three Korean local daily newspapers in terms of sales revenue for that period. These articles were analyzed together with social background research from various books and daily newspapers. The analysis of articles was divided into different categories; such as foundation cosmetics, color cosmetics, hair, and the social background. It was found that the articles related to foundation cosmetics were written the most, the articles related to male appearance management were second, articles on other items including how to manage the skin being the least. As for the social background of Korean male cosmetics, first of all, a change in social recognition can be pointed out. The traditional understanding of gender roles has changed, men's appearance management has started to be regarded as a competitive talent, and at the same time, the esthetic viewpoint for men also has changed. One example is the newly made popular term, "flower-handsome man", which shows the new trend of favoring males with nice skin. Second, the expansion of mass culture can be pointed out. As consumers can get information and fashion trends easier and faster, the fashion spreads fast, and this has led to the generalization and popularization of the sense of beauty. Third, the development of scientific technology and medical science can be pointed out. Thanks to the progress in those areas. the extension of youthfulness has become possible and the cosmetics industry was also affected greatly, as shown in the market spread of functional products for anti-ageing and wrinkle control as the interest in anti-ageing has grown. There are benefits from the development of scientific technology, but the problem of environmental pollution has appeared due to machinery and industrialization and thus the issue of well-being has been raised. Rising interest in naturalism, pro-environmentalism and organic cosmetics has influenced the cosmetics industry. In addition, the quantity of ultraviolet rays exposed to our skin has increased due to the air pollution caused by the destruction of environment, leading to increased usage of sun block lotion. Lastly, the influence of consumer society and the expansion of consumerism culture can be pointed out. In the modern society, consumption acts not only as the use of products and services but it also has an important role of mediating individuals with others and the society. The market for male cosmetics has been expanding and the number of men putting on make-up has been increasing rapidly. Therefore, this study is meaningful in that the analysis of the mode of change and the social background are an essential process in order to provide a direction for the future market for male cosmetics.

멸종위기에 처한 한둑중개(Cottus hangiongensis)의 산란습성 및 초기생활사 (Spawning Behavior and Early Life History of Endangered Cottus hangiongensis)

  • 서원일;유동재;변순규;김이청;이성훈;연인호;한경호;임후순;이배익
    • 한국수산과학회지
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    • 제43권1호
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    • pp.46-53
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    • 2010
  • Spawning behavior and early life history of the tuman river sculpin, Cottus hangiongensis were studied in the laboratory and in the field at Wangpi Stream, Gyeongsangbuk-do, Korea, from January to December, 2007. The spawning ground was in the lower Wangpi Stream, which is a shallow region about 40cm or less in depth. During the spawning period, from March to April, mature males made nest cavities under stone 10 which they led a gravid female. The male and female then turned upside down, and spawning and fertilization occurred onto the ceiling of the nest cavity. After spawning, the male chased the female from the nest and mated with several other females. Fertilized eggs were spherical in shape, demersal, adhesive, transparent and yellow in color, measuring 1.86 mm (1.79~1.93 mm) in diameter. A mean of 17(12~22) various-sized oil globules were counted in the yolk. Granular materials formed a mass in the yolk. Fertilized eggs hatched at 256 hrs, 10 minutes after the morula stage under water temperature of $15.0{\sim}18.0^{\circ}C$. Newly hatched larvae 9.34 mm (9.02~9.69 mm. n=10) in total length (TL) had a large yolk At 14 days after hatching, larvae 11.40 mm (11.07~11.72 mm, n=10) in TL transformed to the postlarval stage. At 41 days after hatching, postlarvae of 18.42 mm (17.31~18.62 mm, n=10) in TL had reached the juvenile stage. The result of this study indicate that Cottus hangiongensis has the spawning ground in the lower stream and the amphidromous life history which is the different from that of Cottus poecilopus.

초음속 항공기 항법등의 이상점등 개선에 관한 연구 (A Study on the Improvement of Abnormal Lighting of Supersonic Aircraft Navigation Light)

  • 박상훈;최재호;이진원;권나은
    • 한국산학기술학회논문지
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    • 제21권8호
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    • pp.215-221
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    • 2020
  • 초음속 항공기에 사용되는 항법등은 항공기의 비행 방향을 알림과 동시에 야간 조명이 없는 상태에서 지상 이동 및 주기 시 항공기의 위치를 식별하기 위해 사용된다. 항법등의 색상 및 장착 위치는 항공법에 따라 좌측 날개는 적색, 우측 날개는 녹색, 미익에는 백색으로 규정되어 있다. 초음속 항공기에 장착되는 항법등은 2가지 동작모드로 작동되며, 하나는 최대 밝기를 출력하는 BRT 모드, 다른 하나는 밝기를 감광하여 출력하는 DIM 모드이다. 항법등은 불빛을 통해 항공기 충돌 방지 역할을 하며, 비행 안전성 및 위치 식별을 위해 매우 중요한 요소이다. 본 연구에서는 초음속 항공기 운용 중 엔진 흡입구 측면과 미익에 장착된 항법등의 비정상 깜박거림 현상을 개선하기 위해 결함 트리 분석 기법을 통해 2단계로 구조화 하여 분석하였으며, 첫 번째 단계에서는 원인요소 3가지, 두 번째 단계에서는 개선안 5가지를 도출하였으며, 이를 통해 항법등의 깜박거림 현상에 대한 최적의 개선 방안을 도출하였다. 원인 분석 결과 초음속 항공기에 사용되는 항법등의 초기 입력 전원이 불안정한 것이 비정상 깜박거림의 주된 원인으로 확인되었다. 개선 방안으로 초기 입력 전원을 안정화시키기 위해 입력단 회로를 조정하였으며, 개선 방안에 대한 타당성을 지상시험 및 항공기 장착시험으로 입증하였다.

Influence of Dietary Addition of Dried Wormwood (Artemisia sp.) on the Performance, Carcass Characteristics and Fatty Acid Composition of Muscle Tissues of Hanwoo Heifers

  • Kim, Y.M.;Kim, J.H.;Kim, S.C.;Ha, H.M.;Ko, Y.D.;Kim, C.-H.
    • Asian-Australasian Journal of Animal Sciences
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    • 제15권4호
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    • pp.549-554
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    • 2002
  • An experiment was conducted to examine the performance and carcass characteristics of Hanwoo (Korean native beef cattle) heifers and the fatty acid composition of muscle tissues of the heifers when the animals fed diets containing four levels of dried wormwood (Artemisia sp.). For the experiment the animals were given a basal diet consisting of rice straw and concentrate mixed at 3:7 ratio (on DM basis). The treatments were designed as a completely randomized design with two feeding periods. Heifers were allotted in one of four dietary treatments, which were designed to progressively substitute dried wormwood for 0, 3, 5 and 10% of the rice straw in the basal diet. There was no difference in body weight gain throughout the entire period between the treatment groups. Feed conversion rate was improved (p<0.05) only by the 3% dried wormwood inclusion treatment compared with the basal treatment. Carcass weight, carcass yield and backfat thickness of all treatment groups were not altered by wormwood inclusion. The 5% dried wormwood inclusion significantly increased (p<0.05) the size of loin-eye area over the other treatments. The higher levels (5 and 10%) of dried wormwood inclusion resulted in the higher (p<0.05) water holding capacity (WHC) in loin than the lower levels (0 and 3%) of wormwood inclusion. The redness ($a^*$) and yellowness ($b^*$) values of meat color were significantly lower (p<0.05) in the top round muscle of heifers fed the diet containing 3% dried wormwood. There was a profound effect of the progressively increased intake of dried wormwood led to the linear increase of unsaturated fatty acid content and the linear decrease of saturated fatty acid content in the muscle tissues of Hanwoo heifers. It is concluded that the feeding diets containing dried wormwood substituted for equal weights of rice straw at 5% levels would be anticipated to provide better quality roughage for beef heifer production and economical benefits for beef cattle producers.