Master Student: Kai Chen

Conference dates: July 7-9, 2018

Conference name: 2018 International Conference on Mechatronic, Automobile, and Environmental Engineering

Conference location: Chiang Mai, Thailand

Presentation title: Analysis of the Thermal Deformation Behavior for a Fixed-Fixed Beam Structure

Reflection

I am very grateful to Professor Zhuang for giving me the opportunity to participate in the international seminar. This is the first time in my two-year master's career that I have attended an international conference abroad and given a full English oral presentation. I am very thankful for Professor Zhuang's usual requirements for the quality of oral presentations, which allowed me to present the best side of my research results to the audience on the day of the seminar with a calm mind. Also, thanks to Professor Zhuang's careful guidance, I was awarded the Outstanding Oral Presentation Award at this international conference.

The content of the presentation is Analysis of The Thermal Deformation Behavior for A Fixed-Fixed Beam Structure, which is part of the results of our technology department's research project. The presentation lasted about 12 minutes, and scholars on-site were given 3 minutes for questions.

The following are the questions raised by scholars on-site regarding the presentation:

Q1: Did you investigate the phenomenon of micro-bridge structures producing adsorption after being subjected to heat and bias pressure?

Immediately, I confirmed the question raised by the scholar and answered the question in detail. First, I explained to the scholar that we did indeed investigate the phenomenon of the structure producing adsorption under bias pressure. However, because today's focus is on the analysis of the thermal deformation behavior of the structure caused by heat, we mainly analyzed the thermal deformation behavior of the test piece after being heated and found the limit current, and the empirical formula of thermal deformation.

Finally, I explained to the scholar that the analysis of the thermal deformation behavior of the structure is only part of my master's thesis and is used to analyze the optimal parameters of the heated structure to produce thermal deformation. After finding the optimal parameters, we will continue to explore the adsorption behavior of the already deformed structure under bias pressure. The ultimate goal of this research is to extract the thermal expansion coefficient of the thin film material through the measurement of the adsorption voltage of the already deformed structure.

Listening Session 1

Integrated Micro Temperature, Humidity And Flow Sensor For Intelligent Production Of Roll-To-Roll Process  

The speaker is a student from the Department of Mechanical Engineering at Yuan Ze University and also the student Session Chair of this report. His research mainly focuses on integrating a humidity sensor, a temperature sensor, and a flow sensor into one circuit device. The speaker explained in detail the method of integrating these devices, which is done by reading the values of various signals through electrical signals. Finally, the scholars in the audience raised questions about the discussion of the temperature coefficient of resistance and whether it would affect the measurement results, and provided the speaker with some key points to be explored in the future.

Listening Session 2

Aging Diagnosis And Failure Prevention in PEM Water Electrolysis Cell   

The presenter is also a student from the Department of Mechanical Engineering at Yuan Ze University and serves as the Session Chair for this presentation. The research mainly focuses on the diagnosis of aging and prevention of faults in PEM water electrolysis cells. The presenter also uses electrical signal detection to predict equipment faults.

Listening Session 3

The Preparation Of Flexible BiFeO3 Piezoelectric Pressure Sensor    

The speaker is a student from Tainan University, and the research mainly focuses on the development of a pressure sensor. The author has produced a pressure sensor made of BiFeO3 and uses piezoelectric signals to detect pressure signals. In the end, there were questions raised by the audience about the determination of pressure signals. The audience pointed out that the pressure sensor developed by the author seems to only detect two types of signals: with applied pressure and without applied pressure, and cannot measure the actual value of the applied pressure. The speaker then responded to the question and indicated that they would conduct further research based on the suggestions made by the audience.。 

Listening Session 4

Investigated Effects Of The Operating Conditions For Zeotropic Mixtures With Transcritical Organic Rankine Cycle    

The speaker is a student from Ching Yun University of Science and Technology and also the Session Chair of this presentation. The research mainly focuses on the development of a pressure sensor using BiFeO3 material, and the detection of pressure signals through piezoelectric signals. However, during the presentation, a scholar in the audience raised a question regarding the accuracy of the sensor, stating that it seems to only detect two types of signals, one with applied pressure and one without, rather than providing an actual measurement of the applied pressure. The speaker responded to the question and indicated that they will conduct further research based on the suggestion.

Listening Session 5

Simulation And Comparison On Energy Consumption Between Electric And Diesel Buses: 

Feasibility Study On Electric Rubber-Tire Bus Potential In Chiang Mai    

The speaker is a student from Chiang Mai University who mainly researches how to efficiently manage and improve the traffic situation in the city of Chiang Mai, as well as how to construct a public transportation system in the most efficient and economical way. At the beginning of the presentation, the speaker analyzed the population of Chiang Mai and compared the number of annual tourist visits to Chiang Mai, showing that if Chiang Mai wants to develop tourism effectively, it is imperative to update the hardware of its public transportation system.

Master Student: Chen Wei-Long

Conference Date: March 27-29, 2018

Conference Name: 2018 ACEAIT (The 5th Annual Conference on Engineering and Information Technology)

Conference Location: Kyoto, Japan

Presentation Title: Simulation Model for Strip Warpage of Molding Process

Reflection

First of all, I am really grateful to my professor and the laboratory for giving me the opportunity to participate in an international conference abroad. Although I had previously attended international conferences in Kenting and Tainan, it was my first time to present in a foreign country. It had been ten years since the last time I traveled by plane. Initially, when I submitted the first version of my presentation slides to my professor, he returned them and requested that our Microsystems Design and Analysis Laboratory represent us with high-quality slides. Therefore, I spent more time practicing and making several versions of the slides, which I presented to my junior students to evaluate which version would be easier for people who are not familiar with my research to quickly understand. As researchers, we often create slides for ourselves rather than for the audience, but it is important to present research in a concise and compelling manner within a limited time frame so that the audience can understand the research contribution. For someone like me who is not very good at English, it takes time to prepare to make others understand my research quickly.

The content of my presentation was a Simulation Model for Strip Warpage of Molding Process, which was part of a 2017 joint project with a company. After a 12-minute oral presentation, a scholar in the audience asked me the following questions:

Q1: Does changing the cooling rate increase the error?

Q2: Does the accuracy decrease when a 3D model is simplified into a 2D model?

At the time, I was not completely clear about the scholar's questions and hurried to explain why we needed to do this temperature process, which was a bit off-topic. Afterwards, my professor reminded me that I should include results from different process conditions (different compounds and temperature changes, etc.) on the backup page to explain immediately regarding Q1. As for the 3D model simplification to 2D, I had included a prerequisite slide in the presentation to explain why we could simplify the 3D model to 2D. After the presentation, my professor emphasized that we could talk about keywords, and unless the strip was twisted, it would not make much difference for the warpage. I am very grateful that my professor gave me a lot of feedback afterward, such as speaking clearly, not spending too much time on the introductory process, emphasizing the results and contributions in the latter part, slowing down when discussing the key points, and emphasizing the conclusion to strengthen our contributions.

This conference abroad taught me a lot. I learned to be brave in speaking and reading English, not to be afraid of making mistakes, and that it was fortunate that my professor requested high-quality presentation slides. Looking back at my previous version, there is indeed a significant difference! Moreover, by observing other people's presentations, I learned not only from their strengths but also what they lacked. Overall, this experience was rewarding, and I have gained many valuable lessons from it.

Listening Session 1

A Basic Study to Calculate 2-D Flow Velocity Profile with Non-Zero Divergence

The presenter is Professor Kenjiro Shimano from the Department of Mechanical Systems at Tokyo Metropolitan University, who is also the session chair of this session. His research focuses on developing a method to calculate non-zero divergence two-dimensional velocity profiles, which is different from the conventional two-dimensional approach. He assumes that the velocity component u is given in the x-y plane, while v is unknown. Based on this, given u, he can calculate v. This research is applied to the analysis of the divergent flow of aircraft air flow holes, and an 80x40 calculation grid is used to simulate the u-shaped profile. The results show that the calculated results reflect the overall trend of the divergence situation and have good consistency in terms of the exact location of the peak. However, the divergence peak calculated by his research is too low, approximately 20-60% of the actual value. This error can be attributed to the simple linear relationship used to separate and isolate vortex contributions. The simplified argument proposed by the researcher is consistent with the trend, but the error is slightly larger, and future research needs to be further corrected.

Listening Session 2

Feedback Control Method for an Optical Profilometer based on a DVD Pickup Head

The speaker of this presentation is Professor Hsien-Shun Liao from the Department of Mechanical Engineering at National Taiwan University. He proposed a feedback control method based on a DVD laser detection head for optical profilometry. The DVD laser detection head has the advantages of low cost and small laser spot size. However, it is significantly affected by the surface reflectivity of the sample during height measurement. Therefore, a regular calibration process is required before measurement. In addition, height measurement of samples containing materials with different reflectivities is also less accurate. Professor Liao proposed using the focusing error signal from the DVD detection head as a continuously stationary reference signal by adjusting the vertical position of the sample during scanning. Thus, the scanning trajectory can be represented as a surface profile. The session chair also asked him whether this measurement method could be used on the human body and whether it could cause harm to humans. Professor Liao responded that if it is necessary to measure a particular cell on the human body, a sample needs to be taken for measurement. The laser intensity of the DVD detection head is not very high, so it does not have an impact on the human body.

Listening Session 3

A Study of Geometry Parameters of Non-Contact Vortex Grippers

This is a study published by a student of Professor Chen Chao-kuang at National Cheng Kung University, which focuses on the geometric parameters of non-contact vortex grippers. The study combines computational fluid dynamics (CFD) method with the Reynolds stress transport turbulence model to predict the lift force of non-contact vortex grippers and the pressure distribution on the workpiece surface. The research aims to find the relationship between lift force and several parameters. They found that increasing the diameter of the gripper's internal channel can easily increase the lift force of the gripper. The study also mentioned that it mainly focuses on optimizing different geometric shapes to determine the inner diameter of the gripper, in order to obtain the best performance. However, I see from this that if it is to optimize the parameter range of different geometries, we can actually use the Taguchi method as a tool to assist in finding the optimal geometric conditions.

Listening Session 4

Structural Adhesives Used to Delay the Shear Failure of FRP-Metal Heterogeneous Joints

This is a study conducted by a student of Professor Luo Guangmin at Kaohsiung University of Marine Technology (now renamed as Kaohsiung University of Science and Technology). The research focuses on the strength of adhesive used in the connection between FRP (Fiber Reinforced Plastics) and metals, and uses shear failure in tensile testing to determine the strength of the adhesive. As more and more warships are being made with FRP to effectively lower the center of gravity and improve stealth capabilities, it is necessary to discuss the non-uniform joining methods between FRP and metal. In addition to using bolts to make connections, overlapping fiber cloth is usually used to assemble the upper structure of the fiberglass and the metal hull. In this study, several different types of structural adhesives were used to improve the bonding efficiency. Their research mainly focuses on trying different adhesives to bond FRP and steel, conducting tensile testing on both sides to produce shear failure, and finding the critical failure stress based on the stress-strain curve obtained from the tensile testing to determine which adhesive is more effective. According to their discussion, PU structural adhesive has better reinforcement effect than high-strength epoxy structural adhesive. Professor Liao Xianshun from National Taiwan University also raised a question about whether other methods, such as simulation, were used to verify the effectiveness of different bonding agents. They replied that experiments were currently their main focus.

Listening Session 5

An AR Music Game for the Dementia Elderly

This is a report by three students from the Department of Logistics Management at Chaoyang University of Technology, led by Professor Chen-Yi Lin. Their research is focused on an AR (Augmented Reality) music game for elderly dementia patients. As the world's elderly population continues to grow at an unprecedented rate, the incidence of dementia is sharply increasing. Their study developed a game that combines game modules and song modules, which can be set up with personal and recording modules and collected on a mobile device such as a tablet, phone or laptop. The goal of using the music game is to help elderly dementia patients remember past memories and maintain an active brain, while also providing deep brain stimulation and reaction training to prevent dementia. They also played a video during the report of an elderly lady playing the game in a nursing home. The game was simple and used familiar old Taiwanese songs, and the lady appeared to be very happy and enjoyed it. It was also clear that the game helped improve her concentration.

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