http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
정재훈,임주휘,이재원,강한별,김도훈,신영진,Jae Hoon Jung,Ju Hyi Yim,Jae Won Lee,Han Byul Kang,Do Hoon Kim,Young Jin Shin 한국터널지하공간학회 2023 한국터널지하공간학회논문집 Vol.25 No.3
The use of roadheaders has been increasing to mitigate the problems of noise and vibration during tunneling operations in urban area. Since lack of experience of roadheader for hard rock, the selection of appropriate machines and the evaluation of cutting rates have been challenging. Currently, empirical models developed overseas are commonly used to evaluate cutting rates, but their effectiveness has not been verified for domestic rocks. In this paper, a comprehensive literature review was conducted to assess the rock cutting force, cutterhead capacity, and cutting rate to select the appropriate machine and evaluate its performance. The cutterhead capacity was reviewed based on the literature results for the site. Furthermore, a new empirical model and simplified method for predicting cutting rates were proposed through data analysis in relation to operation time and rock strength, and compared with those of the conventional model from the manufacturer. The results show good agreement for high strength range upper 80 MPa of uniaxial compressive strength.
단일 광섬유 브래그 격자와 EDFA를 이용한 온도와 스트레인의 동시 측정
정재훈,남희,이병호,Jung, Jae-Hoon,Nam, Hui,Lee, Byoung-Ho 대한전자공학회 1999 電子工學會論文誌, D Vol.d36 No.6
We propose and demonstrate a novel sensor which can simultaneously measure strain and temperature. The sensor is composed of a single fiber Bragg grating and an erbium-doped fiber amplifier. Using linear variation in the amplified spontaneous emission power of an erbium-doped fiber amplifier with temperature, we determine the temperature. By subtracting the temperature effect from the Bragg wavelength shift, we determine the strain. Experiments show rms deviations of $18.2{\mu}{\varepsilon}$ and $0.7^{\circ}C$ for strain and temperature, respectively. 하나의 광섬유 브래그 격자와 EDFA를 이용하여 온도와 스트레인을 동시에 측정할 수 있는 센서를 제안하고 구현하였다. 혼도에 따른 EDFA 의 ASE파워의 선형적 변화를 이용하여 온도를 측정하고 전체 브래그 파장변화와 그 온도효과의 차로써 스트레인을 측정하였다. 측정값은 스트레인과 온도 각각에 대해서 $18.2{\mu}{\varepsilon}$과 $0.7^{\circ}C$의 rms 오차를 가진다.
정재훈,김현구,김봉규,Jung, Jae-Hoon,Kim, Hyun-Goo,Kim, Bong-Gyu 한국천문학회 2006 天文學論叢 Vol.21 No.2
Infrared color-color diagram of 10 giant molecular clouds are examined to explore the dust property from the COBE Diffuse Infrared Background Experiment of the 100, 140, and $240{\mu}m$ emission. Four of them, Taurus, Mon OB1, Gem OB1, and Chameleon, show the anti-correlation in $R_{100/140}-R_{140/240}$ plot and the horizontal distribution in $R_{100/240}-R_{140/240}$ plot, which disagree with those of theoretical calculation. These could be explained by the depletion of $100{\mu}m$ and the excess of $140{\mu}m$ emission, though no existing dust model could support them. Mean color temperature of the anti-correlation region appears to be lower than that of the linear region, whose temperatures are 15.3, 17.0 K, respectively. And the linear region shows large dispersion in the plot of intensity relation. Both imply that a star formation would be more active, but not homogeneous, in the linear region compared to the anti-correlation region.
광섬유 표면 플라즈몬 공명 센서를 이용한 스트레인 및 온도 측정
정재훈,김민욱,Jung, Jae-Hoon,Kim, Min-Wook 한국전기전자학회 2007 전기전자학회논문지 Vol.11 No.2
본 논문에서는 광섬유 표면 플라즈몬 공명 센서를 이용하여 스트레인 및 온도 변화에 따른 센서를 제시하였다. 광섬유 센서의 구조는 광섬유의 클래딩 일부를 제거하여 크롬, 은, 금을 증착한 다층 박막 구조를 모델로 하였고, dip 파장의 변화가 선형성을 보임으로써 효율적인 센서로의 활용 가능성을 보이고자 한다. This paper decribess the strain and temperature sensor using fiber optic surface plasmon resonance sensor. The sensor head is 3-layered, Cr, Ag, Au and we showed feasibility to use this sensor to measure strain and temperature.
급성 아토피 피부염 마우스 모델에서 한약조합약물의 염증반응 진정효과
정재훈,김경준,Jung, Jae-Hoon,Kim, Gyung-Jun 대한한방안이비인후피부과학회 2015 한방안이비인후피부과학회지 Vol.28 No.1
Object : The object of this study was effected of composed of 4 herbal medicines(Rubus coreanus, Rehmanniae Radix, Houttuynia cordata, Betulae cortex) on acute atopic dermatitis mice. Methods : BALB/c mice were divided 4 groups ; normal group, negative control group of acute atopic dermatitis mice induced by DNCB, treated apply to the back skin with the herbal medicine group, and treated orally with herbal medicine group. Treated with herbal medicine and DNCB during 2 weeks. After treated, measured WBCs, RBCs, and platelet in the blood, and analysed mRNA expression of spleen. Result : Composed herbal medicines could reduce WBCs, lymphocytes, monocytes, neutrophils, and eosinophils in the mouse blood. And, could down TNF-${\alpha}$ levels in spleen. In the skin tissue histology results, herbal medicines reduce the cells and T cells. Conclusion : Composed herbal medicines help to another inflammatory disease because they reduce the cells and T cells in the skin tissues. And they have inhibitory effects of TNF-${\alpha}$ mRNA expression, and Th 2 immune responses. Therefore herbal medicines use for an acute atopic dermatitis treatment.
Arrayed Waveguide Grating의 스펙트럼해석
정재훈,Jung, Jae-Hoon 한국전기전자학회 2004 전기전자학회논문지 Vol.8 No.1
Arrayed waveguide grating의 스펙트럼을 해석하기 위해 Fresnel Kirchhoff diffraction 식과 Fraunhofer diffraction 근사식을 이용하여 실제로 제작되는 16채널 및 40채널의 arrayed waveguide grating에 대해 적용해 보았으며 Fraunhofer diffraction 근사식을 적용할 때 생기는 문제점을 모델별로 도출하였고 그 오차를 실제의 공정오차와 비교하였다. We performed the spectrum analysis of arrayed waveguide grating using Fresnel Kirchhoff diffraction formula and its approximated Fraunhofer diffraction equation and applied both methods to 16 channel and 40 channel models. We presented the spectra and found out the limitations of Fraunhofer diffraction in analysis of arrayed waveguide grating and compared the errors coming from Fraunhofer diffraction approximation and due to imperfection during the fabrication process.
정재훈,한명월,노종렬,최승호,김상윤,남순열,Jung, Jae Hoon,Han, Myung Woul,Roh, Jong-Lyel,Choi, Seung-Ho,Kim, Sang Yoon,Nam, Soon Yuhl 대한기관식도과학회 2012 大韓氣管食道科學會誌 Vol.18 No.1
Carcinoma arising in a thyroglossal duct cyst is a not common disease. It is detected in approximately 1% of thyroglossal duct cyst, therefore the clinical manifestation of the patient with carcinoma is undistinguishable from the common cystic lesion. Clinically, it may be confounded with a benign lesion and diagnosed after operation. The mainstream of treatment is the Sistrunk operation, however, there is no definite agreement regarding further treatment in addition to an excision of the cyst. The role of total thyroidectomy and the radioactive iodine therapy have been discussed for adjuvant treatment. We have experienced four cases of papillary carcinoma arising in thyroglossal duct cyst. In the three of the cases, the patients underwent Sistrunk operation, while the other one had additional total thyroidectomy and postoperative radioactive iodine therapy. There was no complication in the perioperative period and no signs of recurrence or metastasis during follow-up period.
혁신형 중소기업의 조직혁신역량이 기업의 수출성과에 미치는 영향
정재훈,오가영,Jung, Jae Hoon,Oh, Ka Young 강원대학교 경영경제연구소 2022 Asia-Pacific Journal of Business Vol.13 No.3
Purpose - This study investigate the effect of innovative capacity on corporate export performance and moderating flexibility. Design/methodology/approach - For this, hypotheses were established by reviewing previous studies and an empirical analysis was conducted for testing. Using SPSS 22.0, a frequency analysis of related variables was conducted. Through an exploratory factor analysis, validity and reliability tests of measuring tools were conducted and a descriptive statistics was analyzed for collected data result and hypotheses testing. Findings - Finally, with a verified model, the hypotheses and the moderating effects were tested. The results are as follows; The innovationa capacities have a positive effect on export performance and flexibility However, the flexbilitiy was not moderator in the relationship between innovative capacity and export performance. Research implications or Originality - According to the results above, this study presents directions to improve export performance of technological innovative type SMEs. The innovative capabilities, marketing capacity, organization innovative capacity and process innovative capactity, has an positive effect on
정재훈,김영칠,정석규,Jung, Jae-Hoon,Kim, Young-Chil,Jung, Seok-Kyu Korean Society of Horticultural Science 2010 원예과학기술지 Vol.28 No.3
The effects of 1-methylcyclopropene (1-MCP) for controlling ripening processes such as weight loss, fruit softening, soluble solids content (SSC), titratable acidity (TA), and fruit skin color were investigated and also the possibility that 1-MCP can inhibit the development of brown rot was explored in 'Formosa' plum ($Prunus$ $domestica$ L.). Fruit were treated with $1{\mu}L{\cdot}L^{-1}$ 1-MCP on the day of harvest and one day after harvest for 16 h at ambient temperature ($20^{\circ}C$), followed by 14 days of shelf life. 1-MCP treatment delayed fruit softening, weight loss and changes in skin color and TA during the shelf life period, but did not affect SSC. These 1-MCP effects were similar with and without delayed treatment. 1-MCP treatment inhibited the development of brown rot caused by $Monilinia$ $laxa$ during storage. Our data shows that treatment delays of ${\geq}1$ day before 1-MCP application had no negative effect of fruit softening, fruit skin color, and TA at ambient temperature ($20^{\circ}C$). Overall, these results indicate that 1-MCP can be used to maintain the quality of non-refrigerated plums. 본 연구는 1-MCP가 'Formosa' 자두의 저장 중 품질 변화와 유통기간 연장에 미치는 효과를 밝히고자 수행하였다. 수확한 'Formosa' 자두를 균일한 크기와 색깔로 선별한 후 수확 당일 그리고 수확 후 1일 후에 걸쳐서 각각 1-MCP를 $1{\mu}L{\cdot}L^{-1}$ 농도로 $20^{\circ}C$에서 16시간 동안 처리하여 대조구(무처리)와 비교하였다. 1-MCP를 처리한 후 14일 동안 상온에서 자두의 연화도, 과중감소율, 가용성고형물 함량 변화, 산도, 그리고 과실의 색깔 변화를 측정하였다. 과중감소율과 과실연화도는 1-MCP 처리구가 무처리구에 비해서 적은 변화폭을 보여주었다. 1-MCP 처리 시기(수확당일 그리고 수확 후 1일) 간에는 따른 큰 차이는 없었다. 가용성고형물 함량에는 통계적 유의성은 없었으나, 1-MCP처리구의 과실에서는 산도와 과실의 색깔 변화가 무처리구에 비해서 적게 나타났다. 또한 1-MCP는 저장 중에 발생하는 과실의 부패병 억제효과를 나타내었다. 따라서 본 연구결과, 1-MCP 처리시기(${\geq}1$일) 연장은 상온저장시 과실의 경도, 산도, 과일 색깔 변화에 큰 영향을 미치지 않았으며, 또한 과실품질 유지에 실용성이 있는 결과를 보여주었다.
수종(數種)의 한약재의 Tyrosinase와 Elastase 활성 억제 효과에 대한 실험적 연구
정재훈,김경준,Jung, Jae-Hoon,Kim, Kyung-Jun 대한한방안이비인후피부과학회 2009 한방안이비인후피부과학회지 Vol.22 No.2
Objectives : The purpose of this study is to investigate whitening effects and anti-wrinkle effects of a few 80% ethanol extracted herbal medicines. Methods : In the first study, a few 80% ethanol extracted herbal medicines were screened for their inhibitory activities against the tyrosinase. In the second study, a few 80% ethanol extracted herbal medicines were screened for their inhibitory activities against elastase. Results : 1. We showed 28%, 27% and 19% inhibitions of mushroom tyrosinase at 500 $\mu$g/ml concentration of ASR, AIF and ABR extracts and they were showed higher anti-tyrosinase activity than arbutin's. We also could observe that the decreased mushroom tyrosinase activities in RR, CML, LR, AGR and TH extracts. 2. RR, AF and ABR (final concentrstion 1 mg/ml) were appeared 60%, 98%, 83% of inhibitions of elastase activity, and they were showed higher anti-elastase activity than that of ursolic acid. We also could observe that the decreased elastase activities in AIF, AR, LR and CML extracts. Conclusions : These results suggest that ASR, AIF and ABR extracts contribute to the anti-melanin activities and represent potential sources of whitening agent, and RR, AF and ABR extracts contribute to the anti-elastase activities and represent potential sources of anti-wrinkle agent. These results suggest that some herbal medicines could be strong potential sources of inhibition about anti-aging and whitening effects for the skin.