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인공지반조경에 대한 실태 및 선호도 조사 : 수원 영통 신도시 상업용 건물을 중심으로
서주환,이준근,전형석 경희대학교 디자인연구원 2001 예술· 디자인학연구 Vol.4 No.1
It is being difficult to secure open space by glowing rapidly of the artificial ground by high-density of cities. This study researches and analyses actual condition, problems, consciousness and preference of artificial ground about buildings. And it offers base-knowledge and spreads landscape architecture of artificial ground. So deficient open spaces are settled and it tries to use by way of meaning base-research to improve environment of cities. It is possible for this study to grope direction of activation of landscape architecture of artificial ground reflecting positive effect
장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4
Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.
An Experimental Study on the Oriented Mechanical Properties of Aluminum Micro Thin Foil Material
Lee, Hye Jin,Lee, Nak Kyu,Lee, Hyoung Wook,Choi, Seo Gou,Lee, Geun An Scitec Publications Ltd. 2006 Solid State Phenomena Vol.116 No.-
<P>This paper is concerned about the precision material property measurement of a micro metal thin foil used in MEMS technology. Evaluations of reliability such as the life cycle endurance test, impact test, and residual stress test are necessary for MEMS components, because MEMS components require great precision and accuracy. However, in practical reliability tests, we should consider various factors that make them hard to perform. In this manner, we use the analytical method to evaluate the reliability of MEMS component rather than actual testing. In general, the analytical method is utilized by software tools. Nevertheless, it is obviously necessary to acquire fundamental properties of materials through real test methods. In this paper, we proposed the micro scale material property measurement system to measure the oriented mechanical properties of aluminum thin foil.</P>
( Geun Hyoung Lee ) 대한금속재료학회 ( 구 대한금속학회 ) 2010 ELECTRONIC MATERIALS LETTERS Vol.6 No.4
ZnO nanowires were formed on ZnO films by the oxidation of Zn at a temperature of 600℃ in air. The maximum intensities of the (002) and (101) diffraction peaks were observed for the ZnO film with nanowires on its surface. The finding that the intensities of the (002) and (101) peaks simultaneously exhibited maximum values conflicts with the conventional XRD patterns reported in many other studies on ZnO films. The highest intensity of the (002) peak results from the better crystalline quality than films prepared at other oxidation temperatures, and the highest intensity of the (101) peak is attributed to the higher density of nanowires. In addition, the ZnO film with nanowires exhibited the strongest UV emission intensity.
Benzaldehyde as a new class plant growth regulator on Brassica campestris
( Geun Hyoung Choi ),( Jin Ho Ro ),( Byoung Jun Park ),( Deuk Yeong Lee ),( Mi Sun Cheong ),( Dong Yeol Lee ),( Woo Duck Seo ),( Jin Hyo Kim ) 한국응용생명화학회 2016 Journal of Applied Biological Chemistry (J. Appl. Vol.59 No.2
Plant growth regulator is an essential pesticide to date while the available active ingredient is not well understood unlike fungicide, insecticide and herbicide. This study was aimed to evaluate a new chemical class of plant growth regulator, and the total of 92 benzene derivatives were screened for their germination and early stage of the root growth regulation on Brassica campestris. Thirty benzaldehydes, nine acids, one amide, and one ester showed potent root growth inhibitory activity (>70 % inhibition) while only salicylaldehyde showed potent germination inhibition (IC50 = 81.2 mg/L) suggesting that benzaldehyde was a key module candidate for the growth inhibition. Benzaldehydes were further evaluated for root growth inhibition. 2,3-Dihydroxybenzaldehyde and salicylaldehyde showed IC50 values of 8.0 and 83.9 mg/L, respectively. On the other hand, salicylaldehyde, and 2,4,5- trihydroxybenzaldehyde were found to have root growth promotion effects less than 10 mg/L. This result suggests that the benzaldehyde is a new class candidate for plant growth regulator.
Geun-hee Choi,Yeong Byeon,Hyoung Yool Lee,Kyoungwhan Back 한국육종학회 2015 한국육종학회 심포지엄 Vol.2015 No.07
Caffeic acid O-methyltransferase (COMT) methylates N-acetylserotonin into melatonin; that is, it has N-acetylserotonin O-methyltransferase (ASMT) activity. The ASMT activity of COMT was first detected in Arabidopsis thaliana COMT (AtCOMT). To confirm the ASMT activity of COMT in other plant species, we evaluated the ASMT activity of a COMT from rice (Oryza sativa) (OsCOMT). Purified recombinant OsCOMT protein from Escherichia coli was used to validate the high ASMT activity of OsCOMT, similar to that of AtCOMT. The Km and Vmax values for the ASMT activity of OsCOMT were 243 μm and 2,400 pmol/min/mg protein, which were similar to those of AtCOMT. Similar to AtCOMT, OsCOMT was localized in the cytoplasm. In vitro ASMT activity was significantly inhibited by either caffeic acid or quercetin in a dose-dependent manner. Analogously, in vivo production of melatonin was significantly inhibited by quercetin in 4-week-old detached rice leaves, suggestive of a positive role of COMT in melatonin biosynthesis in plants.
Lee, Geun-Hee,Lee, Zin-Hyoung The Korea Association of Crystal Growth 2002 韓國結晶成長學會誌 Vol.12 No.3
Si-wafers for solar cells were cast in a size of $50{\times}46{\times}0.5{\textrm}{mm}^3$ by vacuum casting method. The graphite mold coated by BN powder, which was to prevent the reaction of carbon with the molten silicon, was used. Without coating, the wetting and reaction of Si melt to graphite mold was very severe. In the case of BN coating, SiC was formed in the shape of tiny islands at the surface of Si wafer by the reaction between Si-melt and carbon of the graphite mold on the high temperature. The grain size was about 1 mm. The efficiency of Si solar cell was lower than that of Si solar cell fabricated on commercial single and poly crystalline Si wafer. The reason of low efficiency was discussed.