Relationship Between Dry Ports and Regional Economy: Evidence from Yangtze River Economic Belt*

Yan Feng LIU,Chong Bae LEE,Guan Qiu QI,Kum Fai YUEN,Miao SU 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.5

With the evolution of containerization and globalization of supply chains, aspects of port functions have made the transition from the sea to the inland region that forms the dry port. To explore the relationship between dry ports and regional economic development, this study uses a gravity model and forecast model to analyze 1,040 observations in 104 cities (22 dry port cities) along the Yangtze River Economic Belt (YREB) from 2008 to 2017. The model includes economic variables, logistics variables, foreign relations variables, and human capital variables. It was found that the dry port is positively correlated with trade volume. Compared with a city without a dry port, the trade volume of a city with a dry port will increase 0.099 times. It can be concluded that a dry port is crucial for the economic development of the YREB. It was also found that per capita GDP as an economic variable, road area and rail number as logistics variables, and foreign relation variables are positively correlated with trade volume, while the human capital variable has no significant effect on trade volume. In addition, governmental policy implications are addressed from the aspects of dry port and industry cluster caused by foreign investment.

Hydrothermal Synthesis of Hierarchical Hollow Li(Ni0.8Co0.15Al0.05)O2 Microspheres for Lithium Ion Batteries

Liu Wenlong,Jiang Weiwei,Yan Chenran,Feng Wei,Wang Dongxia,Zhao Liming,Feng Tingting,Gong Feng 대한화학회 2017 Bulletin of the Korean Chemical Society Vol.38 No.11

Li(Ni0.8Co0.15Al0.05)O2 (NCA) cathode material for lithium ion batteries is synthesized by calcining Ni–Co–Al hydroxide or carbonate hydroxide hydrate precursor, which is obtained by hydrothermal method, and the NCA cathode material is hierarchical hollow microspheres with the diameter in the range of 3–5 µm and composed of nanoflakes and/or nanowires. The effect of hydrothermal reaction time on the morphologies and the crystalline quality of the NCA cathode material is investigated on the basis of scanning electron microscopy, X-ray diffraction, and tunneling electron microscopy. The NCA cathode material shows smooth and monotonous charge/discharge characteristics, delivers a reversible capacity as 144.4 mAh/g and retains 90.4% after 50 cycles at a current density of 0.1 C between 2.5 and 4.3 V.

Normal Estimation for Mass Point Clouds of Irregular Model in the 3D Reconstruction based on Fuzzy Inference

Liu Yan-ju,Jiang Jin-gang,Miao Feng-juan,Tao Bai-rui,Zhang Hong-lie 보안공학연구지원센터 2014 International Journal of Grid and Distributed Comp Vol.7 No.5

This paper presents a fuzzy normal estimate for mass point clouds of irregular models in reconstruction. The irregular model is complex object that some part is smooth and some parts are irregular including sharp features. Therefore, we put kNN and curvature of mass point clouds to fuzzy inference system to divide the kind of point clouds and the output of FIS can determine which part of tooth point clouds belong to. For different kinds point clouds, corresponding algorithm is given. Point clouds in the smooth area are estimated normal by PCA directly and ones in other regions of thin or sharp area are estimated by checker and attach points. This method is simpler than those complex methods used on the whole point clouds directly. The experiment results show that much time is saved and surface reconstruction is very fine than PCA and WLOP.

한-중 컨테이너항만 수출입물동량의 구조적 변화에 관한 연구

유염봉(Liu, Yan-Feng),이충배(Lee, Choong-Bae) 한국물류학회 2019 물류학회지 Vol.29 No.2

지난 수십 년간 한중 경제관계의 진전과 더불어 양국간 컨테이너 물동량은 지속적으로 증가하여 왔으며, 양국의 각 항만의 물동량은 교역관계 및 지리적 요인으로 인해 커다란 변동성을 보여왔다. 이러한 항만간 물동량의 변동성은 항만물류업체에게는 비즈니스 관점에서 그리고 항만정책당국자들에게는 항만 정책 등에서 의사결정에 중요한 요소이다. 컨테이너물동량의 증감은 항만의 경쟁력을 의미하며, 항만 경쟁력은 물동량의 이동과 유치에 중요한 요인이 된다. 따라서 항만물동량의 구조적 변동성 분석은 항만물류연구에서 중요한 과제중 하나이다. 본 연구는 한중간 항만 물동량의 구조적 변동성에 대한 추이를 분석하여 항만운영 및 정책에 시사점을 제시하는 데 목적이 있다. 이를 위해 우리나라의 대표적인 컨테이너 항만과 중국 항만들간 물동량의 변동성과 추이를 HHI지수, 변이할당효과, 입지계수를 분석하고 이를 BCG매트릭스에 포지셔닝하고 이를 토대로 컨테이너 화물유치 전략을 제시하였다. 분석 결과 우리나라의 대중국 컨테이너 화물의 집중도는 점차 하락하였다. 우리나라의 대표적인 컨테이너 항만인 부산항과 광양항으로의 컨테이너 화물공급원으로서의 중국 항만들은 대부분 대형 항만들에서 상대적 비중(LQ계수)이 높고 정(+)의 변동성(변이할당량)을 나타내고 있다. 그러나 인천항의 경우는 규모뿐만 아니라 지리적 근접성이 항만의 물동량 비중과 증가율에 영향을 미치는 것으로 분석되었다. With the progress of Korea-China economic relations, the container trade volume between the two countries has been steadily increasing during last several decades. The trends of container cargo volume between international ports are an important factor for port and logistics companies as well as port authorities. Development of container cargo volume is closely related to the competitiveness of port, on the other hands port competitiveness is one of the most significant determinants for movement of cargo volume. Therefore, structural volatility analysis of port throughput flow between country’s ports is an important issue in port logistics research. This study aims to present the implications for port operation and policy by analyzing the trends of structural volatility of container trade volume between Korea and China during 2003∼2017. For this purpose, it is analyzed the volatility and trends of the container trade volume between ports of the two countries. Several analysis methods such as HHI index, shift-share analysis and location quotient are employed for the BCG matrix analysis, which present the port strategies for attracting container cargoes for Korean container ports. According to the results of the research, the concentration of container cargo from Chinese ports to Korean ports has gradually decreased. Most of Chinese ports as supplying sources of container cargo for Busan, Incheon and Gwangyang port have a high relative proportion (LQ coefficient) in large ports and a high growth rate (shift-share effects). On the other hand, the port of Incheon has a high proportion of the container cargo and growth rate in Chinese ports with geographical proximity in addition to scale of port.

In vitro regeneration of Phaseolus vulgaris L. via direct and indirect organogenesis

Yu Yan,Liu Dajun,Liu Chang,Yan Zhishan,Yang Xiaoxu,Feng Guojun 한국식물생명공학회 2021 Plant biotechnology reports Vol.15 No.3

A stable and efcient regeneration system is a necessary condition for the genetic transformation of Phaseolus vulgaris L. In this study, cotyledonary nodes with one cotyledon, cotyledonary nodes with two cotyledons, embryonic axes and root segments of 5-day-old germinated seeds were used as explants to evaluate explants to induce shoots and calli. Besides, using cotyledonary nodes with one cotyledon as explants, the efects of diferent concentrations of auxins and cytokinins on the direct and indirect organogenesis of common bean were investigated. As a result, embryonic axes and cotyledonary nodes with two cotyledons were the most efective explant types for the formation of shoots and calli. The cotyledonary nodes with one cotyledon were cultured in the shoot induction medium containing 7 mg L−1 6-benzyladenine (BAP) and 0.2 mg L−1 α-naphthaleneacetic acid (NAA). 74.21% of explants directly formed shoots and average number of shoots was up to 2.91. On the rooting medium supplemented with 0.5 mg L−1 indole-3-butyric acid (IBA), the rooting rate of shoots reached 100% and the number of main roots formed was the most. The addition of 0.5 mg L−1 thidiazuron (TDZ) was optimum for callus induction, and the induction rate could reach 91.51%. The shoot regeneration frequency was 93.33% when calli subcultured on the shoot induction medium supplemented with 1.0 mg L−1 BAP. Average 4.27 shoots were produced by per callus and rooted on the shoot induction medium. This report descripts an efcient common bean regeneration system through direct and indirect organogenesis, which can provide reference for its subsequent genetic transformation research.

물류요인이 텐진항만 배후지역의 수출입에 미치는 영향

유염봉(Yan-Feng Liu),소막(Miao Su),이충배(Choong-Bae Lee) 한국무역연구원 2021 무역연구 Vol.17 No.1

Purpose This study analyzes the logistics determinants of import and export volume in the hinterland of Tianjin Port. Design/Methodology/Approach The panel data analysis is used to provide empirical evidence of significantly impacts of economic and logistics performance. Panel data are employed such as regional economy, logistics and dummy variables such as whether or not to have a dry port in 80 hinterland cities in the 12 administrative districts of Tianjin Port during 2002 and 2017. Findings As a result of empirical analysis, economy and logistics factors play significant roles in determining the volume of imports and exports in the hinterland of Tianjin Port. Research Implications Logistics infrastructure including an inland port as it contributes to better logistics performance should be constructed in the hinterland of port since it has significantly a positive effect on the increasing volume of imports and exports.

Coexistence of Amyotrophic Lateral Sclerosis in the Proband of an X-Linked Charcot-Marie-Tooth Disease Type 1 Pedigree in China

Shu-Yan Feng,Shu-Man Feng,Liu-Yi Li,Zhang-Yu Zou 대한신경과학회 2018 Journal of Clinical Neurology Vol.14 No.2

FSCB phosphorylation in mouse spermatozoa capacitation

( Shun Li Liu ),( Bing Ni ),( Xiang Wei Wang ),( Wen Qian Huo ),( Jun Zhang ),( Zhi Qiang Tian ),( Ze Min Huang ),( Yi Tian ),( Jun Tang ),( Yan Hua Zheng ),( Feng Shuo Jin ),( Yan Feng Li ) 생화학분자생물학회(구 한국생화학분자생물학회) 2011 BMB Reports Vol.44 No.8

It is generally accepted that spermatozoa capacitation is associated with protein kinase A-mediated tyrosine phosphorylation. In our previous study, we identified the fibrous sheath CABYR binding protein (FSCB), which was phosphorylated by PKA. However, the phosphorylation status of FSCB protein during spermatozoa capacitation should be further investigated. To this aim, in this study, we found that phosphorylation of this 270-kDa protein occurred as early as 1 min after mouse spermatozoa capacitation, which increased over time and remained stable after 60 min. Immunoprecipitation assays demonstrated that the tyrosine and Ser/Thr phosphorylation of FSCB occurred during spermatozoa capacitation. The extent of phosphorylation and was closely associated with the PKA activity and spermatozoa motility characteristics. FSCB phosphorylation could be induced by PKA agonist DB-cAMP, but was blocked by PKA antagonist H-89.Therefore, FSCB contributes to spermatozoa capacitation in a tyrosine-phosphorylated format, which may help in further elucidating the molecular mechanism of spermatozoa capacitation. [BMB reports 2011; 44(8): 541-546]

Effects of the Substitution of Mischmetal for PrNd on the Microstructures and Magnetic Properties of Rapidly Quenched (MM)PrNd-Fe-B Nanocrystalline Magnets

Zeng-ru Zhao,Xin Wang,Xue-feng Zhang,Qiang Ma,Yan-li Liu,Yong-feng Li,Fei Liu,Gao-feng Wang 한국자기학회 2017 Journal of Magnetics Vol.22 No.1

Mischmetal of Bayan Obo ore was utilized to prepare the high performance (Pr7.34Nd21.86)1-xMMxFe68.7Al0.1-Cu0.12Co0.88B ribbons using melt-spinning method. Phase composition and magnetic properties were investigated at room temperature. The ribbons mainly consist of R2Fe14B phase in isotropic nanostructure. Both coercivity and maximum energy product decrease with the increase of MM content. The magnetic parameters of the ribbons with MM = 20 % in mass are Br = 7.38 kGs, Hcj = 13.66 kOe, (BH)max = 11.81 MGOe. Henkel plots were applied to demonstrate the exchange coupling interaction between grains.

Patterns of Failure and Survival Trends in 3,808 Patients with Stage II Nasopharyngeal Carcinoma Diagnosed from 1990 to 2012: A Large-Scale Retrospective Cohort Study

Xue-Song Sun,Di-Han Liu,Sai-Lan Liu,Qiu-Yan Chen,Shan-Shan Guo,Yue-Feng Wen,Li-Ting Liu,Hao-Jun Xie,Qing-Nan Tang,Yu-Jing Liang,Xiao-Yun Li,Jin-Jie Yan,Ming-Huang Hong,Jun Ma,Lin-Quan Tang,Hai-Qiang M 대한암학회 2019 Cancer Research and Treatment Vol.51 No.4

Purpose The purpose of this study was to investigate the survival trends and patterns of failure in patients with stage II nasopharyngeal carcinoma (NPC) treated with radiotherapy (RT) and chemotherapy over the last 20 years. Materials and Methods Thirty-eight hundred and eight patients diagnosed with stage II NPC between January 1990 and December 2012 were involved in this retrospective cohort study. All patients were treated with RT. According to the main imaging techniques and RT technology, we categorized these patients into four calendar periods: 1990-1996, 1997-2002, 2003-2007, and 2008-2012. Overall survival (OS), progression-free survival (PFS), locoregional relapse-free survival (LRFS), and distant metastasis–free survival (DMFS) were served as the clinical outcome. Results After a median follow-up period of 84.7 months, we observed increasing trends in survival and disease control. The 3- and 5-year OS rates increased from 87.1% and 78.7% in the first calendar period to 97.4% and 94.5% in the last calendar period, respectively (p < 0.001). Additionally, significant increasing trends could be seen in the PFS and LRFS during the four calendar periods. In the subgroup analysis, the LRFS in patients older than 50 years at diagnosis showed greater improvement than younger patients. However, the rate of distant metastasis was stable and relatively low, as the 5-year DMFS ranged from 90.5% to 94.7% among the four calendar periods. Conclusion The survival rates in patients with stage II NPC showed increasing trends from 1990 to 2012. The advance of RT provided excellent locoregional control and enhanced OS.