The effect of coffee capsule packing color on customers’ perceived coffee flavor

Jun Jie Deng(등준걸),Hong-In Cheng(정홍인) 대한인간공학회 2021 대한인간공학회 학술대회논문집 Vol.2021 No.6

Studies on Injection and Mixture Characteristics of High Pressure H₂ and O₂ under Ar atmosphere

( Deng Jun ),( Gong Xuehai ),( Gong Yinchun ),( Li Liguang ) 한국액체미립화학회 2017 한국액체미립화학회 학술강연회 논문집 Vol.2017 No.-

Facing with the hydrogen energy era in future, the development of high-efficiency and zero-emissions of power system is a worldwide problem and challenge. As a potential way to achieve high-efficiency and zero-emissions, the main idea of argon cycled engine concept is to use hydrogen as fuel and pure oxygen as oxidant in the combustion cycle of traditional internal combustion engine, and use Ar (with the specific heat ratio of up to 1.67) as intake charge instead of N₂. Argon cycled engine can substantially increase the theoretical thermal efficiency of traditional combustion engine and meanwhile avoid NOx emissions problem. Since N₂ is replaced with Ar, the in-cylinder ambient density increases, which makes the in-cylinder mixture process of the direct injected gas an outstanding problem. In this paper, studies on penetration length, cone angle, entrainment rate, under-expanded region and other characteristics of H₂ and O₂ injection into the Ar environment were conducted based on experimental method. Based on the high background pressure constant volume chamber and the high-speed camera system, the shape of gas jets under different conditions was studied by shadowing method. Maximum injection pressure is 10MPa. Maximum environment pressure is 1.2MPa.The experimental results show that increase of the injection pressure or the decrease of the environmental pressure leads to significant increases of the gas penetration length. Jet penetration length of O₂ is slightly lower than H₂ by 0-6%. The cone angle of the gas jet increases slightly with the increase of the injection pressure and the ambient pressure. Under all the experimental pressure boundary conditions, the H₂ jet cone angles are between 32 ° and 38 ° and the cone angles of the O₂ jet are between 22 ° and 28 °; The entrainment rate of the gas jet increases with increment of the injection pressure, the ambient pressure and the injection duration. Jet entrainment rate of O₂ is 2.43 to 2.98 times higher than H₂ jet.

From Gene Map to Gene Expression Map: The Second Phase of the Chinese Superhybrid Rice Genome Project (SRGP)

Jun Yu,Song Nian Hu,Jun Wang,Gane K. S. Wong,Wei Lin,Xing Wang Deng,Li Huang Zhu,Meng Liang Cao,Long Ping Yuan,Jian Wang,Huan Ming Yang 한국육종학회 2002 한국육종학회 학술발표회 발표요지 Vol.34 No.2

Workload Comparison of Pushing and Pulling Tasks with a Hand Truck and Cart

Jun Jie Deng(등준걸),Hong-In Cheng(정홍인) 대한인간공학회 2023 대한인간공학회 학술대회논문집 Vol.2023 No.5

Preliminary Application of High-Definition CT Gemstone Spectral Imaging in Hand and Foot Tendons

Kai Deng,Cheng-Qi Zhang,Wei Li,Jun-Jun Wang,Xin-Yi Wang,Tao Pang,Guang-Li Wang,Cheng Liu 대한영상의학회 2012 Korean Journal of Radiology Vol.13 No.6

Objective: To assess the feasibility of visualizing hand and foot tendon anatomy and disorders by Gemstone Spectral Imaging (GSI) high-definition CT (HDCT). Materials and Methods: Thirty-five patients who suffered from hand or foot pain were scanned with GSI mode HDCT and MRI. Spectrum analysis was used to select the monochromatic images that provide the optimal contrast-to-noise ratio (CNR) for tendons. The image quality at the best selected monochromatic level and the conventional polychromatic images were compared. Tendon anatomy and disease were also analyzed at GSI and MRI. Results: The monochromatic images at about 65 keV (mean 65.09 ± 2.98) provided the optimal CNR for hand and foot tendons. The image quality at the optimal selected monochromatic level was superior to conventional polychromatic images (p = 0.005, p < 0.05). GSI was useful in visualizing hand and foot tendon anatomy and disorders. There were no statistical differences between GSI and MRI with regard to tendon thickening (χ2 = 0, p > 0.05), compression (χ2 = 0.5, p > 0.05), absence (χ2 = 0, p > 0.05) and rupture (χ2 = 0, p > 0.05). GSI was significantly less sensitive than MRI in displaying tendon adhesion (χ2 = 4.17, p < 0.05), degeneration (χ2 = 4.17, p < 0.05), and tendinous sheath disease (χ2 = 10.08, p < 0.05). Conclusion: GSI with monochromatic images at 65 keV displays clearly the most hand and foot tendon anatomy and disorders with image quality improved, as compared with conventional polychromatic images. It may be used solely or combined with MRI in clinical work, depending on individual patient disease condition. Objective: To assess the feasibility of visualizing hand and foot tendon anatomy and disorders by Gemstone Spectral Imaging (GSI) high-definition CT (HDCT). Materials and Methods: Thirty-five patients who suffered from hand or foot pain were scanned with GSI mode HDCT and MRI. Spectrum analysis was used to select the monochromatic images that provide the optimal contrast-to-noise ratio (CNR) for tendons. The image quality at the best selected monochromatic level and the conventional polychromatic images were compared. Tendon anatomy and disease were also analyzed at GSI and MRI. Results: The monochromatic images at about 65 keV (mean 65.09 ± 2.98) provided the optimal CNR for hand and foot tendons. The image quality at the optimal selected monochromatic level was superior to conventional polychromatic images (p = 0.005, p < 0.05). GSI was useful in visualizing hand and foot tendon anatomy and disorders. There were no statistical differences between GSI and MRI with regard to tendon thickening (χ2 = 0, p > 0.05), compression (χ2 = 0.5, p > 0.05), absence (χ2 = 0, p > 0.05) and rupture (χ2 = 0, p > 0.05). GSI was significantly less sensitive than MRI in displaying tendon adhesion (χ2 = 4.17, p < 0.05), degeneration (χ2 = 4.17, p < 0.05), and tendinous sheath disease (χ2 = 10.08, p < 0.05). Conclusion: GSI with monochromatic images at 65 keV displays clearly the most hand and foot tendon anatomy and disorders with image quality improved, as compared with conventional polychromatic images. It may be used solely or combined with MRI in clinical work, depending on individual patient disease condition.

Validation of the fuel rod performance analysis code FRIPAC

Yong-Jun Deng,Jun Wei,Yang Wang,Bin Zhang 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.6

The fuel rod performance has great importance for the safety and economy of an operating reactor. Thefuel rod performance analysis code, which considers the thermal-mechanical response and irradiationeffects of fuel rod, is usually developed in order to predict fuel rod performance accurately. The FRIPAC(Fuel Rod Integral Performance Analysis Code) is such a fuel rod performance analysis code that has beendeveloped recently by China Nuclear Power Technology Research Institute Co. Ltd. The code aims at thecomputational simulation of the Pressurized Water Reactor fuel rod behavior for both steady-state andpower ramp condition. A brief overview of FRIPAC is presented including the computational frameworkand the main behavioral models. Validation of the code is also presented and it focuses on the fuel rodbehavior including fuel center temperature, fission gas release, rod internal pressure/internal void volume,cladding outer diameter and cladding corrosion thickness. The validation is based on experimentaldata from several international projects. The validation results indicate that FRIPAC is an accurate andreliable fuel rod performance analysis code because of the satisfactory comparison results between theexperimental measurements and the code predictions.

Proanthocyanidins accelerate the germination of cucumber (Cucumis sativus L.) seeds

Li-jun Zhu,Xing-guang Deng,Li-juan Zou,Jun-qiang Wu,Da-wei Zhang,Honghui Lin 한국식물학회 2016 Journal of Plant Biology Vol.59 No.2

Proanthocyanidins (PAs) are the end products of the flavonoid biosynthetic pathway in many seeds, but their biological function is rarely unknown during seed germination. In the present study, we observed that PAs pretreatment accelerated cucumber seeds germination with maximum efficiency at 0.15% by measuring germination percentage and radical length. Using inhibitors of abscisic acid (ABA), gibberellins (GA) and alternative oxidase (AOX) and H2O2 scavenger pretreatment and gene expression analysis, we found that the accelerated effect of 0.15% PAs on seed germination was due to the decreased ABA biogenesis and enhanced GA production. ROS are induced by PAs pretreatment. Then, the enhanced ROS contributed to GA and ethylene accumulation and ABA decrease in seeds. Moreover, the improvement of GA was involved in the further induction of antioxidant enzymes activities. Therefore, our findings uncover a novel role of PAs in seed germination and clarify the relationships between ROS, ABA, GA and ethylene during seed germination.

Celastrol, produced by Tripterygium wilfordii Hook F. enhances defense response in cucumber seedlings against diverse environmental stresses

Li-jun Zhu,Xing-guang Deng,Li-juan Zou,Peng-xu Li,Jun-qiang Wu,Da-wei Zhang,Honghui Lin 한국식물학회 2017 Journal of Plant Biology Vol.60 No.1

Celastrol is an active triterpenoid compound isolated from Tripterygium wilfordii Hook F.. Many reports have highlighted that celastrol is an effective, safe and desirable approach to the treatment of cancers. However, their biological function during environmental stresses in plants is rarely reported. In the present study, the effects of celastrol on the tolerance against high light (HL), polyethylene glycol (PEG) and cold stress in cucumber (Cucumis sativus L.) were investigated. Celastrol pretreatment could enhance cucumber seedlings stress tolerance at a concentration of 1 μg ml–1. The results showed that pretreatment with 1 μg ml–1 celastrol clearly induced the activities of antioxidative enzymes, which subsequently alleviated stress-induced oxidative damage in plant cells. We also provided evidence that celastrol upregulated ABA biosynthetic gene NCED2 expression and ABA accumulation in cucumber seedlings, which resulted to the enhanced tolerance in response to environmental stresses. Furthermore, the celastrol-pretreated seedlings showed less photosystem damaged caused by the stress conditions, when compared with the control. Therefore, our findings provide a novel role of celastrol in plant against environmental stresses and indicate that the celastrol-induced activities of antioxidative enzymes and ABA content might contribute to the stress tolerance.

택배 분야의 인간공학적 연구를 위한 문헌 연구

등준걸(Jun Jie Deng),정홍인(Hong-In Cheng),고창성(Chang Seong Ko) 대한인간공학회 2021 대한인간공학회 학술대회논문집 Vol.2021 No.11

소형·소량의 운송물을 수탁하여 받는 사람의 주택, 사무실, 그 밖의 장소까지 운송하여 인도하는 것을 일반택배라고 한다. 택배업무에서 주요 작업은 화물분류작업(물류센터 작업), 차량운전, 집화·배송 등의 작업으로 이루어진다. 전세계의 택배 물량은 지속적으로 증가 추세에 있으며 특히 최근 코로나로 인해 급격하게 증가되었다. 국내의 택배업 종사자 수는 2019년 현재 약 6만명에 이르고 있고, 업체 간의 심한 경쟁과 낙후된 작업 환경 등으로 인해 2020년도에 16명의 택배 근로자가 과로사로 사망하였다. 2021년에는 생활물류서 비스산업발전법을 제정하기에 이르렀으나 택배 관련 인간공학적 연구는 미흡한 실정이다. 산업재해를 예방하고 업무의 효율성을 높이기 위해 안전한 택배 작업 방안을 마련하고 작업의 표준을 설정하는 것은 매우 필요하다. 이를 위해 택배와 연관된 인간공학 분야 연구에 관한 문헌 연구를 실시하였다. 이와 같은 연구를 통해 택배업무와 관련하여 이제까지 수행된 다양한 연구를 살펴보고 우리나라 택배와 관련해 추진해야 할 연구방향을 제시하고자 한다. 문헌연구는 국내외 학술 DB와 학위 논문들을 중심으로 수행하였으며 가능한 전반적인 인간공학 분야를 포함시키고자 하였다.

한국 밀레니얼 소비자의 중국산 고관여제품 구매의도 영향요인

Xue Jun DENG,박현재 한국무역상무학회 2022 貿易商務硏究 Vol.93 No.-

The main objective of this study is to identify the antecedents of the purchase intention of Korean millennial consumers on high involvement products made in China, focusing on the personal characteristics of the millennial consumers in Korea. 203 samples were finally used for this analysis using SPSS program. The results of the study are as follows ; First, Openness and extroversion in personal traits have positive (+) effect on customer satisfaction. Second, perceived social risk has been found to play a mediating role in the relationship between extroversion and customer satisfaction. Third, The customer satisfaction has positive (+) effect on purchase intention. As a result, companies which want to sell high-involvement products made in China are found to be effective in focusing on Korean millennial consumers with open personality characteristics and high levels of extroversion, when establishing marketing strategies in Korea. Furthermore, firms which want to sell high-involvement products made in China should also consider managing perceived social risk which plays a mediating role. 한국 소비자들은 보조배터리와 같은 저관여 중국산제품은 잘 구매하지만 노트북, 자동차와 같은 고관여 중국산 제품은 구매하기를 주저한다. 따라서 본 연구는 기존 선행연구의 한계점을 보완하고자 미래 소비의 중심으로 떠오를 한국 밀레니얼의 개인적 특성을 중심으로 고관여제품의 구매의도에 영향을 미치는 선행요인을 파악해보고자 하였다. 연구모형의 검증결과, 밀레니얼 소비자의 개방성과 외향성은 고객만족도에 유의한 영향을 미친다는 것을 알 수 있었다. 또한, 외향성과 고객만족도 사이에 지각된 사회적위험이 매개효과를 보이는 것으로 나타났다. 이상의 연구결과를 바탕으로 이론적, 실무적으로 유용한 시사점을 제시하고자 하였다.