學術演講5

台灣半導體產業會被中國搶走嗎?

卜令楷 教授(成功大學電機系兼任教授/奇景光電、承景科技前副總經理)

<專題討論>2018/10/4(四)14:10綜合大樓2樓48218教室演講

摘要：

半導體產業是台灣最重要的產業，甚至被稱為「鎮國之寶」。近年大陸積極發展半導體產業，投入大量資本外，也大舉來台灣挖角。台灣的半導體產業有可能像許多製造業⼀樣，逐漸被大陸搶走嗎？我們試著從產業分析的角度來討論這個問題。

半導體產業創造出很多科技新貴。但是同時也是著名的「爆肝」產業。為什麼會這樣？有機會避免嗎？我們一起來討論⼀下。

| 附件: 20181004 卜令楷教授.pdf

Road to Venus mission in Japan- from curiosity to the realization-

小山孝一郎教授(Asia Space Environment Research Consortium, Kanagawa, Japan)

2018/7/17(二)14:10綜合大樓3樓48312教室演講

In 2015, One Japanese spacecraft was successfully injected into Venus Orbit after failure of orbit injection in 2010, and it became the first orbiter of other planet, which was named “Akatsuki” (暁、Dawn) after its successful injection. The history of Venus exploration are Venera 1-16 in 1961-1983 by USSR. Mariner 2, 5, and 10 by USA in 1962 -1973, Pioneer Venus by USA in 1987. Vega 1, 2 in 1984 by USSR, Magellan in 1989 by USA, and lastly Venus express in 2001 by ESA. We describe here a road to successful Venus mission. We start from the failure of orbit injection in 2010, and successful injection to Venus orbiter in 2015. Then we go back to the history before successful orbit injection. We had a dream to send a Venus probe in 1980’s. The questions we had are: Why Venus has super rotation, Does active volcano exist, Is there lightning ? Is there Aurora ? Why neutral density in the cryosphere suddenly disappears ? . To make our curiosity satisfy, we prepared for the mission, starting from analysis of data obtained with Pioneer Venus, read thick summary book on Venus, and asked private company to start study in late 1980’s. We describe here phenomena which are still not understood. These include instruments to find the clues to solve the problems for Venus mission, and finally orbit selection the spacecraft which is constrained under the limited capability of launcher. Most important task was to find scientists who are keen to send a probe to Venus. Here is a story which we want to convey to young scientists.

Nanostructure Engineering using Microplasmas: Synthesis and Applications

江偉宏 副教授(臺灣科技大學化學工程學系)

<專題討論>2018/5/3(四)14:10綜合大樓2樓48218教室演講

摘要：

Microplasmas are a special class of electrical discharges formed in geometries where at least one dimension is less than 1 mm. As a result of their unique scaling, microplasmas operate stably at atmospheric pressure and contain large concentrations of energetic electrons (1-10 eV). These properties are attractive for a range of nanomaterials synthesis and nanostructure engineering such as metal nanostructures and carbon-based materials [1-3].

In this presentation, I will discuss these topics in detail, highlighting the advantages of microplasma-based systems for the synthesis of well-defined nanomaterials. These experiments will aid in the rational design and fabrication of nanomaterials and may also have significant impact in emerging applications. Recently, we found that the energetic species including radicals, ions and electrons generated in the microplasmas were capable of initiating electrochemical-assisted reactions for the nucleation and growth of graphene quantum dots [4]. Moreover we develop a simple synthesis of metal nanoparticles/graphene composites using a unique atmospheric-pressure microplasma-assisted electrochemical method. Systematic micro Raman study indicates that the as-produced AgNP/graphene composites show exceptional SERS performance [5].

| 附件: 20180503 江偉宏副教授.pdf

In-situ plasma measurements in the Earth’s ionosphere

方惠寬 博士(成功大學電漿所)

<專題討論>2018/3/29(四)14:10綜合大樓2樓48218教室演講

摘要：

Measurements of plasma are fundamental for space physics, especially for space weather. Recently, giant progress of the CubeSat technologies greatly lowers the barrier to insert a satellite into a lower earth orbit for space exploration. Satellite constellation missions consisting of tens of CubeSats is planned and launched. These missions provide multi-point measurements and make it possible to separate spatial and temporal effects regarding couplings between ionosphere, atmosphere and even lithosphere. And the altitude of these missions are rarely explored by conventional satellites because of large air drag and short mission lifetime. In addition to Cubesat missions, simultaneous multi-instrument measurements onboard sounding rockets aiming for the plasma characteristic investigations in the ionosphere D layers, which is the least-explored region in the ionosphere, is planned. In this presentation, the plasma diagnostic techniques onboard CubeSats and sounding rockets will be introduced. The design concepts and preliminary results of the solar EUV probe onboard the Phoenix CubeSat in QB50 mission and the “Mesosphere and Ionosphere Plasma Exploration complex (MIPEX)” instrument onboard the NCKU sounding rocket, which is planned to be launched in 2020, will be shown. These experiments can provide unique high-quality data of the plasma environment to explore the ion distribution and the electrodynamic processes in the Ionosphere.

| 附件: 20180329 方惠寬博士.pdf

Generation of hydrogen, helium and oxygen EMIC waves by fast magnetosonic shocks in the magnetosphere and in the solar wind

李昆翰 博士(中央研究院地球科學研究所)

<專題討論>2018/3/22(四)14:10綜合大樓2樓48218教室演講

摘要：

Electromagnetic ion cyclotron (EMIC) waves are often observed in the magnetosphere and in the solar wind. Here we propose a new generation mechanism for hydrogen, helium and oxygen EMIC waves associated with fast magnetosonic shocks in the magnetosphere and in the solar wind. In the magnetosphere, these shocks can be associated with either dynamic pressure enhancement or shocks in the solar wind and can lead to the formation of a “bunch” distribution of O+ ions in the perpendicular velocity phase space. The O+ bunch distribution can excite strong He+ EMIC waves and weak O+ and H+ waves. The dominant He+ EMIC waves are strong in quasi-perpendicular propagation and show harmonics in frequency spectrum of Fourier analysis. Further analysis by using Hilbert-Huang transform shows that these signals are similar to Duffing oscillations and exhibit frequency modulation in the instantaneous frequency spectrum. The proposed mechanism can explain the generation and some observed properties of He+ and O+ EMIC waves in the magnetosphere.

Strong fast magnetosonic shocks are often observed in the solar wind. In the shock downstream, the hydrogen and helium ions are strongly heated to achieve high ion beta and high temperature anisotropy. These conditions can lead to efficient generation of EMIC waves and mirror mode waves in the downstream, which are often identified in satellite observations in the solar wind. We find that the EMIC waves are generated both in the parallel and quasi-perpendicular directions. The parallel EMIC waves have been widely studied theoretically and observationally, while the excitation of quasi-perpendicular EMIC waves is usually overlooked. We also find coalescence of mirror waves as they drift with the plasma to further downstream.

| 附件: 20180322 李昆翰博士.pdf