18,639 research outputs found
Exploring the surface and core properties of liquid metals
No full textGallium based liquid metals and their alloys offer extraordinary features originated from their electron and ion-rich metallic core, fluidity and their surfaces that can interact with the surrounding environments. However, their physical and chemical behaviours under different external stimuli are yet to be fully studied. Hence, further research is necessary for exploring the surface and core properties. In this thesis, the author presents three liquid metal-based systems, shows the outcomes of the studies of incorporation of liquid metals in these systems by taking advantage of liquid metals for developing novel functionalities.
In the first stage of this PhD thesis, the author aims to establish an ultrasonication based method for producing gas-sensitive metal oxides coated liquid-metal micro and nanodroplets. The author reveals the tuneability of liquid metal droplets’ size and electronic properties in the process. The gas-sensing performance is investigated under different concentrations of H2 gas and various temperatures. It is shown that gallium based liquid metals can be used for improving the gas sensing functionality by enhancing the surface to volume ratio and forming defects in metal oxides.
In the next stage, this PhD thesis is extended to control the extrusion of liquid metals into flexible and stretchable wires. A set-up for electrical extrusion of liquid metal wires with tuneable surface oxide thicknesses and morphologies is shown and characterised. The author then successfully uses this set-up to demonstrate liquid wire patterning and encapsulating the liquid metal wires in a thin layer to present their self-healing properties.
In the final stage of this research, The author successfully presents a novel continuous flow reactor based on a liquid metal droplet that promotes both mass transport and reaction. The author of this thesis investigates the concept of liquid metal deformation control, Marangoni flow and its reactive surface in aqueous electrolyte for activating precursors into valuable products.
Collectively, the author successfully demonstrates several important scientific findings based on gallium based liquid metals and also builds several novel systems in this PhD thesis, which can potentially impact the future of many fields including material synthesis, additive manufacturing, and also chemical processing
Dataset to support the article "High-resolution 𝜙-OFDR using phase unwrap and nonlinearity suppression"
No full textThis dataset is used for realizing high resolution of phase-sensitive Optical Frequency Domain Reflectometer. It is associated with the research paper:
Guo Z, Yan J, Han G, Yu Y, Greenwood D and Marco J (2023) "High-Resolution φ-OFDR Using Phase Unwrap and Nonlinearity Suppression". Journal of Lightwave Technology, 41 (9), 2885-2891. (https://doi.org/10.1109/JLT.2023.3236775).
The data is presented as an excel file:
High_resolution_OFDR_using_phase_unwrap_and_nonlinearity_suppression.xlsx
This work was funded by High Value Manufacturing Catapult and the Engineer and Physical Sciences Research Council - EPSRC EP/V000624/1. The author Gaoce Han would like to acknowledge the China Scholarship Council for sponsoring.</span
Han Suyin (Chinese author) speaking at Dallas Brookes Hall.
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/276390Han Suyin (Chinese author) speaking at Dallas Brookes Hall.200056
Item: [1999.0081.00439] "Han Suyin (Chinese author) speaking at Dallas Brookes Hall.
A Study on the mathematics textbooks in the era of the Great Han Empire
No full text이 글은 갑오경장(1894)과 경술 국치(1910) 사이에 간행된 산학(수학) 교재류의 목록을 확인하고, 각 텍스트의 출판과 관련된 사항, 소장처, 이본 등의 서지적 정보와 함께 이 시기 산학 교재류의 국어사 자료로서의 의의를 언어 사용 상의 측면에 초점을 두어 정리하는 것을 목적으로 한다. 이는 현대 한국어 태동기의 분과 학문의 도입 양상에 대한 연구의 일환인 한편, 학술 용어의 번역과 정착을 중심으로 이 시기의 한국어의 어휘 확장 양상을 확인하는 데에 필요한 기초 자료를 정리하는 작업의 한 부분이다. 본 연구에 앞선 산학(수학) 교재류에 대한 연구로는 산학 교재류의 서지 사항에 대해 기술한 강윤호(1973:187-199), 김봉희(1992:247-253), 한길준(2009), 오채환 외(2010) 등이 있고, 한국 수학사를 기술하면서 교재류를 함께 다룬 것으로 김용운·김용국(1982)와 이상구(2013)이 있다.This paper aims to make a whole list of the mathematics textbooks in the era of the Great Han Empire and summerize bibliographical data and linguistic characteristics in view of Korean history. In chapter 1, the author reviewed former studies which deals with the mathematics textbooks in the era of the Great Han Empire. In chapter 2, the author summerized bibliographical data of 45 volumes of 32 kinds textbooks. In chapter 3, the author described linguistic characteristics of the textbooks, especially focusing on writing systems, the use of Arabic numerals, horizontal writing, and presence of index or glossary
Also By The Same Author: AKTiveAuthor, a Citation Graph Approach to Name Disambiguation
No full textThe desire for definitive data and the semantic web drive for inference over heterogeneous data sources requires co-reference resolution to be performed on those data. In particular, name disambiguation is required to allow accurate publication lists, citation counts and impact measures to be determined. This paper describes a graph-based approach to author disambiguation on large-scale citation networks. Using self-citation, co-authorship and document source analyses, AKTiveAuthor clusters papers, achieving precision of 0.997 and recall of 0.818 over a test group of eight surname clusters
Dataset to support the article "High Sensing Accuracy Realisation with Millimetre/sub-Millimetre Resolution in Optical Frequency Domain Reflectometer"
No full textThis dataset is used for realizing high sensing accuracy and sub-millimetre resolution of Optical Frequency Domain Reflectometer. It is associated with the research paper "High Sensing Accuracy Realisation with Millimetre sub-Millimetre Resolution in Optical Frequency Domain Reflectometer" in Journal: Journal of Lightwave Technology.
This work was funded by High Value Manufacturing Catapult, grant reference, 160080 CORE (WMG), titled ‘Smart Sensing for Future Batteries’ and the EPSRC (Engineering and Physical Sciences Research Council), grant reference EP/R004927/1, titled ‘Prosperity Partnership’. The author Gaoce Han would like to acknowledge the China Scholarship Council for sponsoring.</span
Impact of Minor Alloy Components on the Electrocapillarity and Electrochemistry of Liquid Metal Fractals
No full textExploring and controlling surface tension‐driven phenomena in liquid metals may lead to unprecedented possibilities for next‐generation microfluidics, electronics, catalysis, and materials synthesis. In pursuit of these goals, the impact of minor constituents within liquid alloys is largely overlooked. Herein, it is showed that the presence of a fraction of solute metals such as tin, bismuth, and zinc in liquid gallium can significantly influence their electrocapillarity and electrochemistry. The instability‐driven fractal formation of liquid alloy droplets is investigated with different solutes and reveals the formation of distinctive non‐branched droplets, unstable fractals, and stable fractal modes under controlled voltage and alkaline solution conditions. In their individually unique fractal morphology diagrams, different liquid alloys demonstrate significantly shifted voltage thresholds in transition between the three fractal modes, depending on the choice of the solute metal. Surface tension measurements, cycle voltammetry and surface compositional characterizations provide strong evidence that the minor alloy components drastically alter the surface tension, surface electrochemical oxidation, and oxide dissolution processes that govern the droplet deformation and instability dynamics. The findings that minor components are able to regulate liquid alloys’ surface tensions, surface element distributions and electrochemical activities offer great promises for harnessing the tunability and functionality of liquid metals
Corvèe under Han
No full textThe author distinguishes between the corvee systems of Ch'in and Han. In spite of the fact that the corvee system underwent a marked change in 167 B. C. in the reign of Emperor Wen of Former Han, the fact has been hitherto almost entirely overlooked. The author tries to reconstruct the Ch'in corvee system from various sources. In the sense that these two ancient empires were despotic in their constitution there was no essential difference between their system of government, but Han succeeded in melting feudalistic residues of the Chan-kuo period into her own system, while Ch'in failed in doing so due to the short period of her rule. Moreover, Ch'in failed in taking local differences into consideration in establishing her institutions. In the author's view the reign of Emperor Wen is significant in the sense that it represents renovation of the feudalistic taxation system and of the uniform and artificial system of local administration
Europa (Yeoyu): 3
No full textInah has been having nightmares. Nightmares of fish bones, fractals, and a marriage that ended under some unnamed violence. Walking the night streets with a man she has known for years, whose feelings for her are bound up with his intense longing to live as a woman, the fragile bond of their relationship threatens to shatter. Internationally acclaimed author Han Kang directs her unflinching gaze on the painful complexities of damage and recovery, questioning what it is we want from ourselves and each other, and whether there are some things that are truly irreparable
HAN start Compacte Opleiding Kostendeskundige Bouw: Vertrek tweejarige opleiding opgevangen
No full textNa het vertrek van de tweejarige opleiding tot bouwkostendeskundige naar Vitruvius Opleidingen besloot de HAN een nieuwe opleiding aan te bieden. Voor deze opleiding is volgens HAN-manager Eric Zinger zeker plaats. "De markt vraagt om compactere en goedkopere scholing op post-hbo-niveau, waarin veel aandacht is voor actuele opgaven zoals herbestemming."OTBArchitecture and The Built Environmen
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