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Sicong Du,Zhenhua Fu,Hongyan Gu 한양대학교 청정에너지연구소 2023 Journal of Ceramic Processing Research Vol.24 No.6
Modernist ideology has been on the rise recently, questioning life’s patterns and treating structures as living organisms thatcan change over time while being environmentally friendly. Yet, a wide variety of innovative materials have had an impacton the future of science and technology in the building industry. The development of economically innovative nanotechnologyalso results from cement-based high ductility materials that are earthquake resistant. Although it has been suggested thatcement-based high ductility nano-earthquake resistant materials. Thus, the goal of addressing the work is to observe the constructionof cement-based high ductility nano-earthquake resistant materials and it influence on the proposal work of houseconstructions. It uses fundamental concept, a sort of gained research which considers infrastructure effects, usage patterns,to provide a thorough evaluation of cement-based high ductility nano-earthquake resistant materials.
Analysis of vehicle acceleration profiles for emissions modelling at signalised intersections
Sicong Zhu,Inhi Kim,Keechoo Choi 대한교통학회 2017 대한교통학회 학술대회지 Vol.77 No.-
The acceleration behaviour of leading vehicles at intersections is needed for queue simulation and emissions estimation. Data obtained from experiments using a driving simulator can provide useful insights into the behaviour of drivers at intersections. The assumption of constant acceleration is found to deviate substantially from accurate, observed accelerations collected by a driving simulator study. The acceleration characteristics are also fundamentally different between participants. Hence, a Markov chain is implemented here to simulate the acceleration behaviour and to reconstruct the acceleration profiles of leading vehicles. Based on the simulator data, the Markov chain reproduces adequately the randomness of acceleration behaviours. Based on the results reported here, a speed acceleration profile is proposed which represents the typical profile at signalised intersections.
주사총(Sicong Zhou),이정언(Jeong Eon Lee) 한국콘텐츠학회 2016 한국콘텐츠학회논문지 Vol.16 No.10
본 연구는 중국기업 구성원이 지각하는 임금만족이 개인의 성과에 미치는 영향과 상사-부하간 관계(LMX)의 조절효과를 실증적으로 분석하였다. 본 연구는 임금만족, LMX, 직무만족 및 이직의도 간의 관계를 파악함으로써 전략적인 인사정책 수립에 유용한 이론적·관리적 시사점의 제시를 목적으로 하였다. 실증연구 결과, 중국기업의 근로자는 임금에 대해 만족할수록 직무만족 역시 높아지는 것으로 나타났다. 이러한 결과는 근로자들의 직무만족도를 향상시키고 조직 이탈을 방지하기 위해서는 경영·관리적 차원에서 다양한 임금관리의 노력이 이루어져야 함을 시사한다. LMX의 조절효과 여부를 실증적으로 검증한 결과, LMX는 임금만족에 따른 직무만족과 이직의도의 수준을 유의미하게 변화시킬 수 있음이 확인되었다. 이러한 연구의 결과는 근로자들의 일에 대한 만족을 높이고 심리적 불안정성을 낮추기 위해서 기업의 관리자는 임금의 만족 향상뿐만 아니라 긍정적인 관계 형성과 유지에 적극적인 노력을 기울여야 한다는 시사점을 제공한다. The current study examined the relationship between satisfaction with pay and performance. The purpose of this study is not only to analyse the effect of pay satisfaction on job satisfaction and turnover intention, but to verify the moderating effect of LMX in order to provide a useful theoretical and managerial implication. The empirical results reveal that satisfaction of pay positively affects job satisfaction, but has a negative impact on turnover intention. It is also found a moderation effect of LMX between pay satisfaction and performance. The empirical results imply that an effective compensation management should be applied and an enhanced LMX effort has to be made to motivate employee.
리스총(Li, Sicong),고석인(Ko, Seok-in) 한국조형디자인학회 2021 조형디자인연구 Vol.24 No.4
1999-2009년 사이 중국은 복잡하고 다원화된 사회 전환기에 처해 있었다. 사회경제가 신속으로 발전하는 동시에 군중들은 문화에 대한 소비에 관심을 갖기 시작한다. 그러나 이와 더불어 물질의 승리로 문화도덕을 평가하는 기준이 생겨나기 시작하였는데 이는 중국 현대 예술가들이 중국 정치체제 하에서의 이데올로기에 대한 회의와 비판을 하게끔 한다. 중국 현대 회화예술도 시대의 발전과 더불어 중대한 변모를 갖게 된다. 즉 20세기 80년대의 뿌리 찾기, 이성, 생명 등의 유행개념에서 “개인 생존현황”에 대한 주목으로 이어진다. 본 논문은 스위스 심리학가 칼 구스타프 융(독일어: Carl Gustav Jung, 1875년- 1961년)의 “페르소나”이론과 중국 1999-2009년 사이의 사회배경에 근거하여 류따훙(劉大鴻), 장쇼깡(張曉剛), 쩡판즈(曾梵誌), 웨민쥔(嶽敏君) 등 대표로 하는 예술가들의 창작을 사례로 선정하고 “페르소나 회화”에서 언급하는 패러디, 풍자, 자조와 은유 등 네 가지 수사법을 분석하였다. 이로써 “페르소나 회화”가 함축하는 심미적 정신, 철학적 의미, 인문적 함의, 그리고 예술가가 어떻게 중국 사회정치와 문화환경 하에서 페르소나 수법을 통해 사회문제를 반영하고 인문적 관심을 표현하는지를 고찰하였다. 분석을 통해 “페르소나 회화”는 반성과 비판적 인문주의정신을 담고 있어 예술가들이 사상을 표현하는 제일 유효한 방식이라는 것을 알 수 있었다. 그리하여 격변하는 시대에서 개체와 대중의 감정을 표현하는 중요한 매개체임을 알 수 있었고 현재 중국 현대 예술에 보다 이성적인 해독방식과 예술전파 방법론을 제공하였다고 보았다. China between 1999 and 2009 was experiencing fast and complex social transition, during which rapid socio-economic development brought about the consumption of cultural products, and material triumphs was considered as a criterion for culture and morality. In face of this, contemporary Chinese artists started to question and criticize ideology under the influence of the Chinese political system. Contemporary Chinese painting also made a major shift with the tide of times, from the popular concepts such as the search for roots, rationality and life of the 1980s, to the concern for the individual state of being . Applying Swiss psychoanalyst Carl Jung s theory of persona and discussing the social context of China between 1999 and 2009, this paper then analyzes the four rhetorical techniques involved in persona painting , namely parody, irony, self-deprecation and metaphor based on case study of Liu Dahong, Zhang Xiaogang, Zeng Fanzhi and Yue Minjun’s work. The purpose is to explore the aesthetics, philosophy, and humanistic care behind the form of persona painting , and how the artists use persona rhetoric to express their thinking on social issues and humanistic concerns in terms of China s socio-political and cultural environment. The final conclusion is that persona painting is an effective method for artists to express their thoughts, which in itself full of reflection and critical humanism. Therefore, persona painting is an important carrier of personal and public emotions in the era of great changes, and it also finds out a rational path of interpretation, as well as an appropriate methodology of art communication in regard of contemporary Chinese art.
Experimental study on U-shape flat thermosyphon for thermal management of power battery
Tao Wang,Sicong Tan,Cong Guo,Hongchao Su,Chaohong Guo,Yuyan Jiang 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.9
The paper presents a new type of U-shape flat thermosyphon. The thermosyphon has several unique properties relative to general heat pipe such as compact and simple structure (no wick structure), easily to filling the coolant and flexible plate structure and so on. These properties make it an ideal heat transfer device for battery pack thermal management. In this paper, we experimentally study the thermal management performance of the U-shape flat thermosyphon for a battery module. The temperature of the battery module can be controlled below 50 °C under 1.5 C charge rate (300 W), and below 37 °C under 1 C charge rate (120 W), and the corresponding maximum temperature difference is 3 °C and 7 °C, respectively. And higher power generation is helpful to start-up the U-shape flat thermosyphonand maintain a small temperature difference between different battery cells. The performance of the U-shape flat thermosyphonis evaluated using a thermal resistance network model, which showed that there is uneven distribution of heat transfer in the two side of the heat pipe.
Wei Han,JianDong Mi,SiCong Zhang,Jun Xu,BinYu Qin 한국유체기계학회 2021 International journal of fluid machinery and syste Vol.14 No.4
For water-jet propellers, the geometry size of the guide vane change can effectively improve the performance of the pump. If other parameters remain unchanged, CFD numerical simulation of the guide vane number and wrap angle of the change can be used to effectively adjust the operation conditions of the pump. The relationship between the changes in pump head, pump efficiency, and water-jet propeller propulsive efficiency can be used, to find the best guide vane parameters to achieve the highest thrust efficiency. The calculation results show that an increase in the guide vane number coefficient and wrap angle coefficient will reduce size of the pump head. Meanwhile, an increase in the wrap angle coefficient and the guide vane number coefficient will reduce the propulsive efficiency of the whole water-jet propeller. In this experiment, it was found that the propulsion effect is best when the guide vane number coefficient remains unchanged and the wrap angle coefficient is 1.
Heat dissipation in high-power semiconductor lasers with heat pipe cooling system
Shili Shu,Guanyu Hou,Lijie Wang,Sicong Tian,Leonid L. Vassiliev,Cunzhu Tong 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.6
This study focuses on the application of heat pipes in thermal management for high-power semiconductor lasers. The heat pipe cooling systems are used for heat dissipation in high-power semiconductor lasers. These systems are used instead of water cooling machines to realize a compact and lightweight laser module. The n-shaped heat pipe cooling system, which consists of eight 6 mm copper heat pipes with sintered powder wicks, can easily handle a heat load of up to 73 W from a single-laser unit. The fabricated U-shaped heat pipe cooling system, which consists of ten 12 mm copper heat pipes with sintered powder wicks, can easily handle a heat load of up to 300 W from five laser units. The optical power of the multi-laser module cooled by the U-shaped heat pipe cooling system reaches 210 W. These results indicate that high-power semiconductor lasers can be cooled using heat pipe cooling systems instead of water cooling machines.
Xianlin Li,Biao Huang,Tairan Chen,Ying Liu,Sicong Qiu,Jing Zhao 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.1
We investigated the influence of geometrical parameters of the orifice plate on the cavitation structures, and optimized these parameters by using a surrogate-based model with special emphasis on the concentration of hydroxyl radical released. The results show that for the orifice plate of the hydrodynamic cavitation system, the possible location of the inception of the cavity spreads to throat and divergent section of the venturi geometry. Based on the surrogate model and global sensitivity assessment, the diameter of throat D t and diameter of inlet D in significantly influenced the size of the cavity, while the length of throat L t had little effect on both cavitation intensity and flow rate. It should be noted that when L t is decreased, the size of cavity would be slightly decreased but the flow rate increased clearly. The increase of the diverging section is in favor of the size of cavity. By comparing the experimental measurements on the concentration of Methylene blue, the optimum geometry of the orifice plate for best cavitational activity is proposed.
A graphene‑based highly sensitive aptasensor for the detection of lung cancer marker CA125
Junnan Chen,Lingmin Yu,Wenzhen Xu,Tao Lin,Sicong Jiang,Caijin Jin 한국탄소학회 2023 Carbon Letters Vol.33 No.6
Graphene-based sensors have emerged as significant tools for biosensing applications due to their unique electrical, mechanical, and thermal properties. In this study, we have developed an innovative and sensitive aptasensor based on the surfacemodified graphene for the detection of lung cancer biomarker CA125. The sensor leverages the combination of graphene surface and gold nanoparticles (AuNPs) electrodeposition to achieve a high level of sensitivity and selectivity for the biomarker detection. A noticeable decrease in electron transfer resistance was observed upon the AuNPs deposition, demonstrating the enhancement of electrochemical performance. Our experimental findings showed a strong linear relationship between the sensor response and CA125 concentrations, ranging from 0.2 to 15.0 ng/mL, with a detection limit of 0.085 ng/ mL. This study presents a novel approach to lung cancer detection, surpassing the traditional methods in terms of invasiveness, cost, and accuracy. The results from this work could pave the way for the development of graphene-based sensors in various other biosensing applications.