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The Dynamics of Interorganizational Collaboration in Disaster Management:A Network Study Based on Flood Disasters in China

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International Journal of Disaster Risk Science 2023年第6期14卷 979-994页

作者： Zhichao Li long liu Shaodan liu School of International and Public Aff airs Shanghai Jiao Tong UniversityShanghai 200030China School of Government East China University of Political Science and LawShanghai 201620China

Interorganizational collaboration networks have become an important tool for disaster ***,research on how different organizations can effectively collaborate throughout the entire disaster management process in centralized states such as China is *** study begins to fill this lacuna by investigating interorganizational collaboration in different phases of disaster management and analyzing changes in the structure of the networks constructed during the preparedness and response phases of the 2020 flood disaster in Hubei Province,*** on the complex adaptive systems(CAS)theory,we argue that interorganizational collaboration changes dynamically according to its tasks and *** the preparedness phase,interorganizational collaborations primarily follow established plans and choose horizontal selforganized collaboration ***,when the urgent information and resource requirements increase in the response phase,many organizations choose vertical mandatory collaboration *** found that organizations at the central and provincial levels in China were well positioned to coordinate information and resources and strengthen the interorganizational collaboration and communication that is crucial in disaster *** findings contribute to the study of interorganizational collaboration networks in disaster management.

关键词： China Complex adaptive system Disaster management Flood disasters Interorganizational collaboration Social network analysis

A hybridized electromagnetic-triboelectric nanogenerator designed for scavenging biomechanical energy in human balance control

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Nano Research 2021年第11期14卷 4227-4235页

作者： long liu Qiongfeng Shi Chengkuo Lee Department of Electrical and Computer Engineering National University of Singapore4 Engineering Drive 3Singapore117576Singapore Center for Intelligent Sensors and MEMS National University of SingaporeBlock E6#05-115 Engineering Drive 1Singapore117608Singapore NUS Suzhou Research Institute(NUSRI) Suzhou Industrial ParkSuzhou215123China NUS Graduate School-Integrative Sciences and Engineering Programme(ISEP) National University of SingaporeSingapore119077Singapore

For human beings of different ages and physical abilities, the inherent balance control system is ubiquitous and active to prevent falling, especially in motion states. A hybridized electromagnetic-triboelectric nanogenerator (HETNG) is prepared to harvest biomechanical energy during human balance control processes and achieve significant monitoring functions. The HETNG is composed of a symmetrical pendulum structure and a cylinder magnet rolling inside. Four coils are divided into two groups which form into two electromagnetic generators (EMGs). Besides, two spatial electrodes attached to the inner wall constitute a freestanding mode triboelectric nanogenerator (TENG). With a rectification circuit, the HETNG presents a high output power with a peak value of 0.55 W at a load of 160 Ω. Along with human balance control processes during walking, the HETNG can harvest biomechanical energy at different positions on the trunk. Moreover, the HETNG applied in artificial limb has been preliminarily simulated with the positions on thigh and foot, for monitoring the actions of squat and stand up, and lifting the leg up and down. For the elder that walks slowly with a walking aid, the HETNG equipped on the walking aid can help to record the motions of forwarding and unexpected falling, which is useful for calling for help. This work shows the potential of biomechanical energy-driven HETNG for powering portable electronics and monitoring human motions, also shows significant concerns to people lacked action capability or disabled.

关键词： hybridized electromagnetic-triboelectric nanogenerator human balance control internet of things artificial limb

The atlas of cytoophidia in Drosophila larvae

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Journal of Genetics and Genomics 2020年第6期47卷 321-331页

作者： Yuanbing Zhang Jingnan liu Ji-long liu School of Life Science and Technology Shanghai Tech UniversityShanghai201210China University of Chinese Academy of Sciences Beijing100049China Institute of Biochemistry and Cell Biology Shanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai200031China

In 2010,cytidine 50-triphosphate synthase(CTPS)was reported to form the filamentous or serpentine structure in Drosophila,which we termed the *** the last decade,CTPS filaments/cytoophidia have been found in bacteria,budding yeast,human cells,mice,fission yeast,plants,and archaea,indicating that this mechanism is highly conserved in *** addition to CTPS,other metabolic enzymes have been identified to have the characteristics of forming cytoophidia or similar advanced structures,demonstrating that this is a basic strategy of ***,our understanding of the physiological function of the cytoophidium remains incomplete and ***,we took the larva of Drosophila melanogaster as a model to systematically describe the localization and distribution of cytoophidia in different tissues during larval *** found that the distribution pattern of CTPS cytoophidia is dynamic and heterogenic in larval *** study provides a road map for further understanding of the function and regulatory mechanism of cytoophidia.

关键词： CTP synthase Cytoophidium Drosophila Larva Metabolic enzyme

A mini review： Functional nanostructuring with perfectly-ordered anodic aluminum oxide template for energy conversion and storage

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Frontiers of Chemical Science and Engineering 2018年第3期12卷 481-493页

作者： Huaping Zhao long liu Yong Lei Institute of Physics and IMN MacroNano Ilmenau University of Technology Ilmenau 98693 Germany

Nanostructures have drawn great attentions for functional device applications. Among the various techniques developed for fabricating arrayed nanostructures of functional materials, nanostructuring technique with porous anodic aluminum oxide （AAO） membrane as templates becomes more attractive owing to the superior geometrical characteristics and low-cost preparation process. In this mini review, progress about functional we summarize our recent nanostructuring based on perfectly-ordered AAO membrane to prepare perfectly- ordered nanostructure arrays of functional materials toward constructing high-performance energy conversion and storage devices. By employing the perfectly-ordered AAO membrane as templates, arrayed nanostructures in the form ofnanodot, nanorod, nanotube and nanopore have been synthesized over a large area. These as-obtained nanostructure arrays have large specific surface area, high regularity, large-scale implementation, and tunable nanos- cale features. All these advanced features enable them to be of great advantage for the performance improvement of energy conversion and storage devices, including photo- electrochemical water splitting cells, supercapacitors, and batteries, etc.

关键词： nanostructuring perfectly-ordered AAO template photoelectrochemical water splitting sodium-ion batteries supercapacitors

mTOR-S6K1 pathway mediates cytoophidium assembly

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Journal of Genetics and Genomics 2019年第2期46卷 65-74页

作者： Zhe Sun Ji-long liu School of Life Science and Technology ShanghaiTech University MRC Functional Genomics Unit Department of Physiology Anatomy and Genetics University of Oxford

CTP synthase(CTPS), the rate-limiting enzyme in de novo CTP biosynthesis, has been demonstrated to assemble into evolutionarily conserved filamentous structures, termed cytoophidia, in Drosophila, bacteria, yeast and mammalian cells. However, the regulation and function of the cytoophidium remain elusive. Here, we provide evidence that the mechanistic target of rapamycin(mTOR) pathway controls cytoophidium assembly in mammalian and Drosophila cells. In mammalian cells, we find that inhibition of mTOR pathway attenuates cytoophidium formation. Moreover, CTPS cytoophidium assembly appears to be dependent on the mTOR complex 1(mTORC1) mainly. In addition, knockdown of the mTORC1 downstream target S6 K1 can inhibit cytoophidium formation, while overexpression of the constitutively active S6 K1 reverses mTOR knockdown-induced cytoophidium disassembly. Finally, reducing m TOR protein expression results in a decrease of the length of cytoophidium in Drosophila follicle ***, our study connects CTPS cytoophidium formation with the mTOR signaling pathway.

关键词： mTOR Cytoophidium CTP synthase Colorectal cancer cell Drosophila

Temperature-sensitive cytoophidium assembly in Schizosaccharomyces pombe

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Journal of Genetics and Genomics 2019年第9期46卷 423-432页

作者： Jing Zhang Ji-long liu MRC Functional Genomics Unit Department of PhysiologyAnatomy and GeneticsUniversity of OxfordOxford0X13PTUnited Kingdom School of Life Science and Technology ShanghaiTech UniversityShanghai201210China

The metabolic enzyme CTP synthase(CTPS) is able to compartmentalize into filaments,termed cytoophidia,in a variety of organisms including bacteria,budding yeast,fission yeast,fruit flies and mammals.A previous study in budding yeast shows that the filament-forming process of CTPS is not sensitive to temperature *** we study CTPS filamentation in the fission yeast Schizosaccharomyces *** our surprise,we find that both the length and the occurrence of cytoophidia in *** decrease upon cold shock or heat *** temperature-dependent changes of cytoophidia are fast and *** advantage of yeast genetics,we demonstrate that heat-shock proteins are required for cytoophidium assembly in *** sensitivity of cytoophidia makes *** an attractive model system for future investigations of this novel membraneless organelle.

关键词： CTP synthase Cytoophidium Schizosaccharomyces pombe Heat-shock protein Nucleoside/nucleotide metabolism Cell biology Yeast genetics Cell compartmentalization

Sparks of the CRISPR explosion:Applications in medicine and agriculture

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Journal of Genetics and Genomics 2017年第9期44卷 413-414页

作者： Ji-long liu School of Life Science and Technology ShanghaiTech University Department of Physiology Anatomy and Genetics University of Oxford

Exactly 30 years ago,Nakata and coworkers published a paper analyzing the 1664-nucleotide sequence of a chromosomal DNA segment that contained the iap gene and its flanking regions in Escherichia coli（Ishino et al.,1... 详细信息

关键词： Sparks of the CRISPR explosion:Applications in medicine and agriculture

May the Force Be with You: Metabolism of Arginine and Pyrimidines

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Journal of Genetics and Genomics 2015年第5期42卷 179-180页

作者： Ji-long liu Medical Research Council Functional Genomics Unit Department of Physiology Anatomy and Genetics University of Oxford

＂Why do arginine and pyrimidines have to be considered together？＂ This was the question I asked when I was invited by Barbara Zimmermann to attend the 23rd Intemational Conference on Arginine and Pyrimidines （ICAP） three years ago. The meeting was held in the summer of 2012 at Bogota, Columbia, known as the ＂the Athens of South America＂. I am not alone in wanting to know more about the relationship between arginine and pyrimidines. Last summer, when ! was organising the next ICAP meeting at Oxford （Aughey et al., 2014）, one of my colleagues asked me, ＂Why such a weird name for a conference？＂ I am not sure if I had given her a satisfying answer and I was enthused to find out what the reasons may be.

关键词： ICAP Metabolism of Arginine and Pyrimidines May the Force Be with You CPS

Unified plastic modulus in the bounding surface plasticity model

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Science China(Technological Sciences) 2016年第6期59卷 932-940页

作者： XIAO Yang liu Han long liu Hong SUN Yi Fei State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University Key Laboratory of New Technology for Construction of Cities in Mountain Area Chongqing University College of Civil Engineering Chongqing University Faculty of Engineering and Information Sciences University of Wollongong

A unified plastic modulus parameter for the bounding surface plasticity model is introduced in order to maintain the identical responses of modeling for both the two-dimensional and three-dimensional stress space with the same model parameters. Also discussed are the influences of the plastic modulus parameter on the stress-strain relationship and the plastic modulus. The model is more sensitive in modeling the stress strain responses when the plastic modulus parameter is small. The plastic modulus parameter has a great influence on the magnitude of the plastic modulus, especially at the initial loading stage. The plastic modulus asymptotically tends to zero at the end of loading.

关键词： bounding surface strength criterion plastic modulus dilatancy peak-stress ratio