방풍통성산(防風通聖散)이 L-NAME 유발 및 SHR 흰쥐의 고혈압에 미치는 영향

이영화,김경철,이용태,Lee, Young-Hwa,Kim, Kyung-Chul,Lee, Yong-Tae 대한동의생리학회 1999 동의생리학회지 Vol.14 No.2

In order to get the effect of Bangpoongtongsungsan (BPS) water extract on the blood pressure of every 5 group of rats (in normal state of after 3 hours of unanesthetized) was measured and following results were obtained. 1. BPS intraperitoneal injection was not recognized as having the effect of decreasing blood pressure compared with Control on hypertension induced by L-NAME in young rats. 2. BPS oral administration was recognized as having the effect of decreasing blood pressure compared with Control on hypertension induced by L-NAME in young rats. 3. BPS oral administration was recognized as having the effect of decreasing blood pressure compared with Control on hypertension induced by L-NAME's continual injection and BPS continual oral administration in young rats. 4. BPS oral administration was recognized as having the effect of decreasing blood pressure compared with Control on hypertension induced by L-NAME's in adult rats. 5. BPS oral administration was not recognized as having the effect of decreasing blood pressure compared with Control on spontaneous hypertension rats. According to the above results. it is known that BPS extract oral administration decreased the blood pressure of hypertension induced by and more effective to the youth.

감마선 검출을 위한 초전도 상전이 센서

이영화,김용함,Lee, Young-Hwa,Kim, Yong-Hamb 한국초전도학회 2008 Progress in superconductivity Vol.9 No.2

We are developing a sensitive gamma ray spectrometer based on superconducting transition edge sensors. The detector consists of a small piece of high purity Sn as an absorber and a Ti/Au bilayer as a temperature sensor. It is designed to measure the thermal signal caused by absorption of gamma rays. The mechanical support and the thermal contact between the absorber and the thermometer were made with Stycast epoxy. The bilayer was formed by e-beam evaporation and patterned by wet etching on top of a $SiN_X$ membrane. A sharp superconducting transition of the film was measured near 100 mK. When the film was biased to the edge of the transition, signals were observed due to single photon absorption emitted from an $^{241}Am$ source. The measured spectrum showed several characteristic peaks of the source including 59.5 keV gamma line. The full with at half maximum was about 900 eV for the 59.5 keV gamma line. The background was low enough to resolve low energy lines. Considerations to improve the energy resolution of the gamma ray spectrometer are also discussed.

Ni-Cr계 합금을 이용한 정밀 박막저항체의 제조 및 특성

이영화,박세일,김국진,임영언,Lee Young Hwa,Park Se Il,Kim Kook Jin,Ihm Young Eon 한국전기전자재료학회 2006 전기전자재료학회논문지 Vol.19 No.1

Precision thin film resistors using evanohm R alloy were fabricated by do magnetron sputtering method. The physical and electrical properties of the resistors were studied after treatment of thermal annealing. The crystallization of the film was increased as the annealing temperature increase. Diffusion and oxidation of Cr and Al elements were occurred into the film surface. The minimum TCR values of 10.46 ppm/$^{\circ}C$ and 10.65 ppm/$^{\circ}C$ were measured at the annealing temperatures of $200^{\circ}C$ and $300^{\circ}C$, respectively. We are conducting additional studies to improve characteristics of our resistors for practical device application.

Ti/Au 이중층을 이용한 초전도 상전이 센서 제작

이영화,김용함,Lee, Young-Hwa,Kim, Yong-Hamb 한국전기전자재료학회 2008 전기전자재료학회논문지 Vol.21 No.10

We report on the development of transition edge sensors for x-ray detection. The sensor technology was based on the fabrication of a superconducting film on a thin membrane. A bilayer of a superconductor, Ti, and a noble metal, Au, was e-beam evaporated on a micromachined SiNx. Another Au layer was evaporated on the two side edges of the bilayer in order not to be affected by structural imperfections at the boundaries. With the method described in the present report, the superconducting transition temperature of the device was consistently achieved to near 80 mK with a sharp transition. The energy spectrum ueasured with the device provided 37 eV FWHM for 5.9 x-rays. We also discuss the design and fabrication considerations as well as the performance of the device in detail.

유채 꽃가루 분말을 이용한 효모 배양배지 제조

이영화,김광수,장영석,최인후,이경보,Lee, Yong-Hwa,Kim, Kwang-Soo,Jang, Young-Seok,Choi, In-Hu,Lee, Kyeong-Bo 한국응용과학기술학회 2015 한국응용과학기술학회지 Vol.32 No.1

The aim of this study was to analyze nutritional compositions of rapeseed pollen granules and to determine the possible usage of pollen granules as a yeast culture medium. Rapeseed pollen granules (per 100 g) were consisted of carbohydrate 58.9 g, protein 20.8 g, fat 4.1 g, ash 2.5 g and water 13.7 g. And fructose (13.7 g), glucose (11.1 g), and sucrose (6.6 g) of sugars and K (606.7 mg) and P (603.3 mg) of minerals were highly contained. In addition, free amino acids such as glutamic acid (2,482.4 mg), aspartic acid (2,136.5 mg), lysine (1,648.3 mg), and leucine (1,631.1 mg) were present at a higher level. When liquid medium, which was made from cracked pollen granules (5, 10, 15, 20, 25, 30, and 40 g/L), was tested for yeast culture, liquid medium containing pollen granules over 15 g/L showed higher yeast growth than YPD medium (control). Liquid medium containing both cracked pollen granules (15 g/L) and NaCl (1 ~ 20 g/L) improved yeast growth than the liquid medium without NaCl. In addition, when yeast growth was tested on solid medium made from pollen granules (15 g/L) at $30^{\circ}C$ for 2 days, yeast colonies were equally well-formed like those grown on YPD medium. Overall, rapeseed pollen granules have potential properties on yeast growth and could be used as a primary source for yeast culture.

클린뷰티 화장품에 나타난 통합 브랜드 커뮤니케이션 연구

이영화,Lee, Young-Hwa 한국융합학회 2021 한국융합학회논문지 Vol.12 No.4

'Clean beauty' attracts attention with an increasing interest in cosmetics without harmful ingredients as people wear masks in the age of COVID-19. Thus, this study selected and analyzed clean beauty cosmetic brands circulated in Korea on/offline in 2020. This study extracted 36 clean beauty brands and selected 20 suitable brands through an experts' analysis. For an analysis of clean beauty cosmetic brand communication, components: naming, logo, color, package, and website were drawn to conduct a survey. Preferred were the words they come up with when they think of nature or health for naming; wordmarks in a simple form for logo; greenish or yellowish for color; the simple form aligned center on the container body for package; and the images of plants, animals, and humans for website. To sum up the components, utilizing natural, clean, and light images harmoniously, acted as a factor for preferring the clean beauty cosmetic brands.

아동의 성별에 따른 인정욕구, 불안 및 분노억제와 관계적 공격성 간의 관련성

이영화 ( Young Hwa Lee ),김경연 ( Kyong Yeon Kim ) 대한가정학회 2013 Human Ecology Research(HER) Vol.51 No.2

The major purpose of this study was to explore the relation of a child`s need for approval, anxiety and anger-in on a child`s relational aggression according to gender. The study`s participants included 464 boys and girls selected from fifth-and sixth-graders at an elementary school in Busan. A child`s need for approval, anxiety, anger-in and relational aggression were assessed with their own self-reports. For data analysis, Cronbach α, T-test, Pearson correlation coefficients, and Multiple Regression were used. The collected data was analyzed by the SPSSWIN 18.0 program. The major findings were as follows: First, child`s anger-in demonstrated a significant difference among sexes. Girls indicated higher points than boys. Second, Boys` need for approval indirectly affected child`s relational aggression through anger-in. Boys` anger-in was directly affected by relational aggression. Boys` anxiety was directly affected by anger-in. And boys` anxiety indirectly affected child`s relational aggression through anger-in. Third, Girls` anxiety was directly affected by relational aggression. Need for approval and anxiety were directly affected by anger-in. The findings from this study indicates that child`s need for approval, anxiety and anger-in are important elements in relational aggression are affected differently depending on the child`s gender. Also, this study has meaning in that it can be used as fundamental data to develop a teaching plan and counseling program for children that can decrease relational aggression.

보호공학 방법론에 관한 연구

이영화(Lee Young Hwa),이남용(Lee Nam Yong) 한국정보보호학회 1999 정보보호학회지 Vol.9 No.2

실리콘 미세 가공을 이용한 열전형 미소유량센서 제작 및 특성

이영화 ( Young Hwa Lee ),노성철 ( Sung Cheoul Roh ),나필선 ( Pil Sun Na ),김국진 ( Kook Jin Kim ),이광철 ( Kwang Chul Lee ),최용문 ( Yong Moon Choi ),박세일 ( Se Il Park ),임영언 ( Young Eon Ihm ) 한국센서학회 2005 센서학회지 Vol.14 No.1

A thermoelectric flow sensor for small quantity of gas flow rate was fabricated using silicon wafer semiconductor process and bulk micromachining technology. Evanohm R alloy heater and chromel-constantan thermocouples were used as a generation heat unit and sensing parts, respectively. The heater and thermocouples are thermally isolated on the Si₃N₄/ SiO₂/Si₃N₄ laminated membrane. The characteristics of this sensor were observed in the flow rate range from 0.2 slm to 1.0 slm and the heater power from 0.72 mW to 5.63 mW. The results showed that the sensitivities ((??(ΔV)/??(q)); AV : voltage difference, 4 : flow rate) were increased in accordance with heater power rise and decreasing of flow rate.

직무스트레스가 조직유효성에 미치는 영향

이영화(Young-Hwa Lee),임왕규(Wang-Kyu Lim) 한국콘텐츠학회 2011 한국콘텐츠학회논문지 Vol.11 No.9

본 연구는 요양보호사를 대상으로 직무스트레스가 심리적 소진 및 조직유효성에 미치는 영향과 사회적 지원의 조절효과를 탐구하는데 목적을 두었다. 본 연구를 위해 서울소재의 노인장기보험법에 준한 재가노인방문요양시설의 인력배치 기준을 준수하고 있는 50개의 사회복지법인 및 개인시설에서 요양보호사 290명을 대상으로 자료를 수집하였다. 자료수집방법으로는 구조화된 질문지를 사용하였으며, 가설검증을 위한 주된 자료분석방법으로는 단계적 회귀분석기법을 사용하였다. 연구결과 직무스트레스 요인인 역할모호성, 역할갈등 및 업무량의 세 변수 모두 심리적 소진에 정의 영향을 미치는 것으로 나타났다. 그리고 역할모호성과 역할갈등의 두 직무스트레스 변수와 심리적 소진 모두 조직유효성 측정지표인 직무만족에 부의 영향을 미치는 반면에 이직의도에는 정의 영향을 미치는 것으로 나타났다. 직무스트레스 변수인 업무량은 직무만족에는 부의 영향을 미치는 반면에 이직의도에는 유의미한 영향을 미치지 않았다. 한편 사회적 지원 변수인 상사의 지원과 동료의 지원 모두 심리적 소진에는 부의 영향을 미치는 반면에 직무만족에는 정의 영향을 미치는 것으로 나타났다. 그리고 이직의도와 관련해서는 상사의 지원은 부의 영향을 미치는 반면에 동료의 지원은 유의미한 영향을 미치지 않는 것으로 나타났다. 사회적 지원의 조절역할과 관련해서는 상사의 지원이 역할모호성과 직무만족 간의 관계를 조절하며, 동료의 지원이 역할모호성, 역할갈등 및 업무량과 심리적 소진 간의 관계와 그리고 역할모호성과 이직의도 간의 관계를 조절하는 것으로 나타났다. The purpose of this study was to investigate the effects of the elderly long-term care workers' job stress on psychological burnout and organizational effectiveness and the moderating role of social support. For this study, data were collected from 290 long-term caregivers from 50 in-home visitation care facilities in Seoul using structured questionnaires. Collected data were analyzed using hierarchical regression techniques. Results showed that role three job stress variables had positive effects on caregivers' psychological burnout; that two job stress variables(role ambiguity and role conflict) and psycholigcal burnout had negaive effects on caregivers' job satisfaction whereas they had positive effects on caregivers' intent to leave; that workload negatively impacted caregivers' job satisfaction but no effect on their intent to leave; and that two social support variables played moderating roles in the relationship between job stress and psychological burnout and the relationship between job stress and organizational effectiveness.