A Particle Swarm Optimization-Based Multi-level Processing Parameters Optimization Method for Controlling Microstructures of an Aged Superalloy During Isothermal Forging

Dong‑Dong Chen,Y. C. Lin 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.5

To obtain the designed target microstructures of an aged superalloy during isothermal forging, a multi-level processingparameters optimization method is developed based on particle swarm optimization (PSO) algorithm. In the developedmethod, the accurate material models are used to characterize the microstructural evolution. Based on the designed targetmicrostructures, the global and local optimality criterions are constructed to alternately optimize global and local multi-levelprocessing parameters by the PSO algorithm with a linear decreasing inertia weight strategy. The optimized initial volumefraction of δ phase (δVF), deformation temperature and strain rate are 12.95%, 1000 °C and 0.001 s−1, respectively. Accordingto these optimized parameters, the recrystallization volume fraction, average grain size and δVF are 100%, 11.2 μm and2.1%, respectively, which well agree with the designed targets. Additionally, the processing parameters optimized by thedeveloped method and traditional processing maps are compared. It is found that the developed method is more effective tocontrol microstructures for the studied superalloy.

경피흡수제제의 약동학적 분석 : Ketoprofen 첩포제의 예

장인진,임동석,이우영,신상구 大韓臨床藥理學會 1994 臨床藥理學會誌 Vol.2 No.2

美國急進主義運動의 擡頭와 衰退要因硏究

鄭然植,金慶麟,陳壽美,金東根 慶北大學校 1986 論文集 Vol.42 No.-

The purpose of this study is to explore the unfolding of the radical movement in the United States during the turn of this century. It particularly concerns about the factors determining the uprising of the radicalism at the end of the 19th century and its fall with the World War Ⅰ. The rise of American radical movement can be traced back to the industrializing era after the Civil War. It started as a reaction to the evils resulted from the rapid industrialization. Initially several movements broke out sporadically, however, until the radical ideology from Europe was flowed in. Then, the radical movement was accelerated. During this period, the leading figures who particularly influenced the development of the movement were: De Leon from the Socialist Labor Party; Gompers from the American Federation of Labor; Debs from the Socialist Party; and Haywood from the Industrial Workers of the World, etc. The movement in this era was unfolded the following historical phases: from 1870s to 1880s, the preparation stage of organizing the movement; 1890s, early action stage characterized by the Populist Movement, Pullman Strike, etc.; 1900s, the flourishing phase led by the Socialist Party and IWW; the declining phase was followed since the end of 1910s; after 1920s, American pragmatism again prevailed over radicalism. Factors attributed to the rise of the radical movement are: depravation of entrepreneurship; recurrent economic crises; deterioration of labor conditions; the influence of Marxism; and insensitive attitudes on the part of the capitalists and government. This paper also suggests the factors determining the decline of the movement: the rise of the American patriotism around the World War Ⅰ era; government's strong counteractions; anti-socialism prevailed by the negative impact of the Soviet Revolution; collapse of the movement organizations; economic recovery after the War; and the government's implementations of reforming policies. At conclusion, radicalism in the United States has played the preventive role against the risk of irreversible corruption of the Establishment and its rigidity.

Effect of Male-Sterile Cytoplasm on the Genetic Performance of Agronomic Traits in $F_1$ Hybrid Rices

Lin, Wen-Xiong,Kim, Kil-Ung,Shin, Dong-Hyun,Lee, In-Jung,He, Shui-Lin,Moon, Huhn-Pal The Korean Society of Crop Science 1998 Korean journal of crop science Vol.43 No.2

Three different male-sterile cytoplasmic lines and their common maintainer 'Zhenshan 97B' and two elite restorer lines were used to study cytoplasmic effects on agronomic trait manifestation per se under different nitrogen supply levels. The result showed that cytoplasmic effects could be modified by nitrogen environments. The cytoplasmic effect on grain yield under 150 kg N/ha varied depending on crosses, while it was significantly negative in most crosses under both 60 and 330 kg N/ha. The correlation and path-coefficient analyses suggested that it was expected to improve cytoplasmic effects through reducing maximum tillers and increasing the percentage of productive tillers, leading to increased productive tillers and higher yield in hybrid rice by the aid of cultural practice and genetic transformation. This study also revealed that the same cytoplasm in different combinations had differential effect under the same nitrogen environment, indicating that cytoplasmic effect was produced by interaction of nuclear genes with cytoplasm rather than cytoplasm per se. These results indicated the usefulness of evaluating diverse cytoplasmic sources in various nuclear genotypes bred for hybrid rice breeding program. The finding also suggested that negative cytoplasmic effect could be effectively overcome by elite restorer lines through the interaction of nuclear genes with female cytoplasm.

Infectious Disease Disaster Management and Cooperative Governance - Securing Resources for COVID-19 Disaster Response Using SNA -

Lin Dong,Jae Eun Lee 위기관리 이론과 실천 2021 Crisisonomy Vol.17 No.12

이 논문은 COVID-19 대응 과정에서의 다양한 사회조직 간의 협력적 역할을 검토하고, Social Network Analysis(SNA)을 통해 조직 간의 협력적 네트워크의 구조와 특징을 과학적으로 분석하는 데 목적이 있다. 이는 감염병 재난관리 과정에서 사회조직 간의 협력적 네트워크를 연구하는 것이 돌발적인 재난 상황에 직면할 때 대응 능력을 보완하는데 중요한 의미가 있기 때문이다. COVID-19 재난에서 나타난 다양한 사회조직 간의 협력적 거버넌스의 개선방안을 제시하면 다음과 같다. 첫째, 다양한 사회조직들 사이에는 장기적으로 효력이 있는 상시적 협력 플랫폼을 만들어야 한다. 둘째, 중대한 돌발 재난상황에서 사회조직의 재난 대응 능력을 제고해야 한다. 셋째, 지방의 사회조직이 협력 방법 을 혁신하고 공공관계를 강화해야 한다. The purpose of this paper is to review the cooperative roles among various social organizations in the COVID-19 response process and to scientifically analyze the structure and characteristics of cooperative networks between organizations through Social Network Analysis(SNA). Studying cooperative networks among social organizations in the process of infectious disease disaster management has important meaning in supplementing the ability to respond to sudden disasters. The ways to improve cooperative governance among various social organizations that emerged from the COVID-19 disaster are as follows. First, it is necessary to establish a permanent cooperation platform that is effective in the long run among various social organizations. Second, it is necessary to enhance the disaster response capacity of social organizations in critical and sudden disaster situations. Third, local social organizations should innovate their cooperative methods and strengthen public relations.

The impacts of urban spatial structure and socio-economic factors on patterns of commuting: a review

Dong Lin,Andrew Allan,Jianqiang Cui 서울시립대학교 도시과학연구원 2015 도시과학국제저널 Vol.19 No.2

Previous studies have reported that urban spatial structure and the spatial relationship between jobs and housing are strongly correlated with commuting patterns. Nevertheless, a number of studies have also supported the concept that the spatial relationship between workplaces and residences cannot be the only reason behind observed commuting behaviour. Some ‘soft’ factors also affect people's commuting patterns. When considering these ‘soft’ factors, urban land development patterns such as urban structure and the spatial relationship between jobs and housing must not be overlooked. In this paper, we first conduct a brief review of the debate about how urban spatial structure and the jobs–housing relationship affect commuting patterns. Then we mainly focus on the ‘soft’ factors related to commuting behaviour. We divided the ‘soft factors’ into city-level factors and individual- and household-level factors. These perspectives will offer insights to identify a set of key factors that could affect the patterns of commuting.

Isolation, Identification, and Performance Studies of a Novel Paraffin-degrading Bacterium of Gordonia amicalis LH3

Dong-Hui Hao,Xin Song,Jian-Qiang Lin,Yu-Jie Su,Yin-Bo Qu,Jian-Qun Lin 한국생물공학회 2008 Biotechnology and Bioprocess Engineering Vol.13 No.1

In this study, we describe the isolation and identification of a novel long-chain n-alkane degrading strain, Gordonia amicalis LH3. Under aerobic conditions, it utilized approximately 18.0% of paraffin (2% w/v) after 10 day of incubation, and the paraffin compositions of C18C24 alkalines were utilized preferentially. Under anaerobic conditions, paraffin utilization was approximately 1/8 that seen under aerobic conditions, and the compositions of C34 and C36 alkalines were utilized preferentially. The effects of salinity, temperature, and biosurfactants on paraffin degradation were also evaluated. The strain was also demonstrated to grow on oil, and decreased oil viscosity by 44.7% and degraded oil by 10.4% under aerobic conditions. Our results indicated that G. amicalis LH3 has potential applications in paraffin control, microbial enhanced oil recovery (MEOR), and the bioremediation of hydrocarbon-polluted environments.

Enhancing Natural Disaster Resilience through NGO Participation in China

Dong Lin,Jae Eun Lee,Seol A Kwon,Quan Jin 위기관리 이론과 실천 2020 Crisisonomy Vol.16 No.10

The purpose of this paper is to strengthen natural disaster resilience by providing strategic measures for NGOs to participate in disaster management in China. For the research purpose, this paper used the SWOT (Strengths, Weaknesses, Opportunities and Threats) analysis method to qualitatively analyze the internal and external environmental factors that NGOs face in the disaster management process, in combination with AHP to quantitatively analyze each factor. We suggested strategic measures for NGOs in the disaster management field at the public sector and NGO levels as follows; ① to supplement laws and policies; ② to strengthen supervision and auditing; ③ to emphasize participation enthusiasm; ④ to strengthen promotion; ⑤ to reinforce communication; ⑥ to train professional manpower through various channels; ⑦ to establish cooperative relationships with other actors, and ⑧ to pay attention to the vulnerable.

Restricting Factors and Countermeasures of Development in Business Services Industry of Shandong Province

Dong Hua Lin,Wen Xiu Zhai 한국유통과학회 2013 KODISA ICBE (International Conference on Business Vol.2013 No.-

Firstly, this article expounds that business service industry plays an important role in adjusting industrial structure, transforming mode of economic growth, improving people's living standards, enhancing Enterprise's Kernel Competitiveness and promoting the development of service industry. Then it analyzes the development of business services in Shandong from two perspectives. The first perspective, by using methodology for statistical analysis, it will review the development scale, professional level, the number of opening units, quantity of employment, and operating revenue of business services in Shandong. On this basis, the article will summarize its development characteristics, experience and existing shortcomings. The second perspective, by using comparison analysis methodology, to compare the development of Shandong with Jiangsu, Guangdong, Zhejiang and Shanghai’s and found the subjective and objective factors that restrict the development of business service industry in Shandong. In the light of restricting factors, countermeasures have been developed based on the experience at home and abroad. These countermeasures will contribute to promoting the optimization and upgrading of industrial structure, improving industrial competitiveness and speeding up the economic development rapidly and stably.

Sub-centres, socio-economic characteristics and commuting: a case study and its implications

Dong Lin,Andrew Allan,Jianqiang Cui 서울시립대학교 도시과학연구원 2017 도시과학국제저널 Vol.21 No.3

Institutional and economic reforms in China have not only delivered major improvements in people’s living standards but also changed the spatial structure of Chinese cities. In addition, substantially increased commuting times have become a serious problem influencing quality of life in the mega-cities of China. Accordingly, research into the dynamics of urban restructuring in rapidly growing Chinese cities and the impacts on workers’ commuting patterns would provide important evidence in this research field. The results of this case study suggest that polycentric urban development has a significant influence on employees’ commuting times. Promoting local jobs-housing balance in sub-centres would shorten commuting times for workers. The findings also suggest that the locations and types of employment centres are significantly associated with individuals’ choice of housing and workplace locations, and accordingly their commuting behaviour. The effects of decentralization of employment on workers’ commuting times differ depending on the extent of suburbanization of different economic sectors. The findings in this research also suggest that workers’ commuting behaviour is related to individual socio-economic characteristics, such as income and education.