演題：熱力学計算ソフトウェアによる膨大な計算データを用いた対話的合金設計手法の検討
日時：2023年12月13日(水)13:00-17:00（※ご登壇予定時間：13:00-14:00）
会場：早稲田大学 各務記念材料技術研究所 講演室
講師：本山 雄一（早稲田大学 客員准教授・産業技術総合研究所 主任研究員）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へ
主催：創造理工学研究科 総合機械工学専攻
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：Circular Architecture
日時：2023年11月29日(水)14：00－15：40
会場：西早稲田キャンパス 56号館104教室
講師：藤 貴彰（tyfa/Takaaki Fuji + Yuko Fuji Architecture 代表・三菱地所設計チーフアーキテクト）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：創造理工学部 建築学科
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
Researchers present a novel experimental system for simultaneous measurement of dynamic mechanical properties and X-ray computed tomography
Rubber-like materials can exhibit both spring-like and flow-like behaviors simultaneously, which contributes to their exceptional damping abilities. To understand the dynamic viscoelasticity of these materials, researchers from Japan have recently developed a novel system that can conduct dynamic mechanical analysis and dynamic micro X-ray computed tomography simultaneously. This technology can enhance our understanding of the microstructure of viscoelastic materials and pave the way for the development of better materials.
Experimental setup for the simultaneous measurement of dynamic mechanical properties and dynamic micro X-ray CT.
Rubber-like materials, commonly used in dampeners, possess a unique property known as dynamic viscoelasticity, enabling them to convert mechanical energy from vibrations into heat while exhibiting spring-like and flow-like behaviors simultaneously. Customization of these materials is possible by blending them with compounds of specific molecular structures, depending on the dynamic viscosity requirements.
However, the underlying mechanisms behind the distinct mechanical properties of these materials remain unclear. A primary reason for this knowledge gap has been the absence of a comprehensive system capable of simultaneously measuring the mechanical properties and observing the microstructural dynamics of these materials. While X-ray computed tomography (CT) has recently emerged as a promising option for a non-destructive inspection of the internal structure of materials down to nano-scale resolutions, it is not suited for observation under dynamic conditions.
Against this backdrop, a team of researchers, led by Associate Professor (tenure-track) Masami Matsubara from the School of Creative Science and Engineering at the Faculty of Engineering at Waseda University in Japan, has now developed an innovative system that can conduct dynamic mechanical analysis and dynamic micro X-ray CT imaging simultaneously. Their study was made available online on October 19, 2023 and will be published in Volume 205 of the journal Mechanical Systems and Signal Processing on December 15, 2023.
“By integrating X-ray CT imaging performed at the large synchrotron radiation facility Spring-8(BL20XU) and mechanical analysis under dynamic conditions, we can elucidate the relationship between a material’s internal structure, its dynamic behavior, and its damping properties,” explains Dr. Matsubara. At the core of this novel system is the dynamic micro X-ray CT and a specially designed compact shaker developed by the team that is capable of precise adjustment of vibration amplitude and frequency.
The team utilized this innovative system to investigate the distinctions between styrene-butadiene rubber (SBR) and natural rubber (NR), as well as to explore how the shape and size of ZnO particles influence the dynamic behavior of SBR composites.
The researchers conducted dynamic micro X-ray CT scans on these materials, rotating them during imaging while simultaneously subjecting them to vibrations from the shaker. They then developed histograms of local strain amplitudes by utilizing the local strains extracted from the 3D reconstructed images of the materials’ internal structures. These histograms, in conjunction with the materials’ loss factor, a measure of the inherent damping of a material, were analyzed to understand their dynamic behavior.
When comparing materials SBR and NR, which have significantly different loss factors, the team found no discernible differences between their local strain amplitude histograms. However, the histograms displayed wider strain distributions in the presence of composite particles like ZnO. This suggests that strain within these materials is non-uniform and depends on the shape and size of the particles, which may have masked any changes from the addition of the particles.
“This technology can allow us to study the microstructure of rubber and rubber-like materials under dynamic conditions and can result in the development of fuel-efficient rubber tires or gloves that do not deteriorate. Moreover, this technology can also enable the dynamic X-ray CT imaging of living organs that repeatedly deform, such as the heart, and can even pave the way for the development of artificial organs,” says Dr. Matsubara, highlighting the importance of this study.
Overall, this breakthrough technology has the potential to advance the understanding of the microstructure of viscoelastic materials, likely opening the doors for the development of novel materials with improved properties.
| Authors | Masami Matsubara1, Ryo Takara2, Taichi Komatsu2, Shogo Furuta2, Khoo Pei Loon2, Masakazu Kobayashi2, Hitomu Mushiaki3, Kentaro Uesugi4, Shozo Kawamura2, and Daiki Tajiri2 |
| Title of original paper | In-situ measurement of dynamic micro X-ray CT and dynamic mechanical analysis for rubber materials |
| Journal | Mechanical Systems and Signal Processing |
| DOI | 10.1016/j.ymssp.2023.110875 |
| Affiliations | 1Department of Modern Mechanical Engineering, Waseda University 2Department of Mechanical Engineering, Toyohashi University of Technology 3Hyogo Prefectural Institute of Technology 4Japan Synchrotron Radiation Research Institute |
Located in the heart of Tokyo, Waseda University is a leading private research university that has long been dedicated to academic excellence, innovative research, and civic engagement at both the local and global levels since 1882. The University has produced many changemakers in its history, including nine prime ministers and many leaders in business, science and technology, literature, sports, and film. Waseda has strong collaborations with overseas research institutions and is committed to advancing cutting-edge research and developing leaders who can contribute to the resolution of complex, global social issues. The University has set a target of achieving a zero-carbon campus by 2032, in line with the Sustainable Development Goals (SDGs) adopted by the United Nations in 2015.
To learn more about Waseda University, visit https://www.waseda.jp/top/en
Masami Matsubara is an Associate Professor (tenure-track) at the School of Creative Science and Engineering of the Faculty of Science and Engineering at Waseda University, Japan. He earned his Ph.D. from Doshisha University. His research focuses on the mechanics of materials, mechatronics, and dynamic modelling. He has recently worked on vibration reduction methods and dynamic design for large-scale numerical analysis models and detailed design and experimental methods for component and unit testing. He is a member of the Japan Society of Mechanical Engineers (JSME) and SAE International. He received the JSME Medal for Outstanding Paper in 2014, 2020, and 2022.
演題：科学技術と共に実現するインクルーシブな未来社会に向けて
日時：2023年11月27日(月)17：00～18：40
会場： 西早稲田キャンパス 54号館202教室
講師：浅川 智恵子 (日本科学未来館館長、IBMフェロー、カーネギーメロン大学教授)
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へ
主催：先進理工学研究科 物理学及応用物理学専攻
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：Microplasma Engineering of Nanomaterials Synthesis and Applications
(マイクロプラズマエンジニアリングによるナノ材料の合成と応用)
日時：2023年12月12日(火)10：30－12：00
会場：西早稲田キャンパス54号館403教室
講師：Wei-Hung CHIANG（Professor National Taiwan University of Science and Technology）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：先進理工学部 応用化学科
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：Polymer-based batteries: Thin-film printable batteries and scalable, polymer-based redox-flow batteries
日時：2023年11月21日(火)15：00－16：40
会場：西早稲田キャンパス 55号館N棟1階第二会議室
講師：Ulrich S. Schubert（フリードリヒ・シラー大学イェーナ教授）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：先進理工学研究科 応用化学専攻
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：エピジェネティクス研究のがん研究への応用
日時：2023年11月17日(金) 16：30－18：10
会場：西早稲田キャンパス 55号館 S棟6階 ゼミ・会議室B 610
講師：立和名 博昭（公益財団法人がん研究会がん研究所研究員）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：先進理工学研究科 化学・生命化学専攻
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：組織幹細胞はなぜ不均一な状態になるのか？
日時：2023年11月10日(金) 16：30－18：10
会場：西早稲田キャンパス 55号館 S棟6階 ゼミ・会議室B 610
講師：鈴木 伸之介（自然科学研究機構基礎生物学研究所 助教）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：先進理工学研究科 化学・生命化学専攻
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：Modulation instability and excitation of periodic waves
日時：2023年11月13日(月)16:30-18:10
会場：西早稲田キャンパス 62号館W棟１階大会議室A（東側）
講師：Nail Akhmediev （オーストラリア国立大学 名誉教授）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：基幹理工学部 応用数理学科
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：肝臓マクロファージの組織・疾患特異的表現型の獲得機構
日時：2023年12月1日(金) 17：00 – 19：00
会場：早稲田大学 TWIns 生命医科学会議室 02C201
講師：酒井 真志人（日本医科大学大学院医学研究科教授）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：早稲田大学 先進理工学部 生命医科学科
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：Redox-Active Conjugated Microporous Polymers for Ultra-High Areal Capacity Organic Batteries
日時：2023年11月9日(木) 10：00－11：40
会場：西早稲田キャンパス 55号館S棟510室
講師：Rebeca Marcilla García（IMDEA Energy主任研究員）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：先進理工学部 応用化学科
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：Tokyo Vernacular: Historical Memory and the Politics of the Everyday
日時：2023年11月13日(月) 19時00分～20時40分
会場：西早稲田キャンパス 55号館N棟1階第1会議室
講師：SAND JORDAN ALEXANDER（ジョージタウン大学教授）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：創造理工学部 建築学科
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：Surplus – 7 Theses on Sustainability
日時：2023年11月8日(水) 10：40－12：20
会場：西早稲田キャンパス 56号館104教室
講師：Joeg Gleiter（ベルリン工科大学教授）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：創造理工学部 建築学科
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：The principles of healthy buildings
日時：2023年11月8日(水) 16：45－18：45
会場：西早稲田キャンパス 54号館3階03会議室
講師：Pawel Wargocki（Associate Professor, Department of Environmental and Resource Engineering,
Technical University of Denmark）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：創造理工学部 建築学科
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：Flow Chemistry Polymerizations and AI/ML Strategies
日時：2023年10月30日(月) 16：00－17：40
会場：西早稲田キャンパス 55号館N棟1F 第一会議室
講師：Rigoberto C. Advincula（テネシー大学教授）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：先進理工学部 応用化学科
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：Conducting Redox Polymers for Energy Conversion and Storage
日時：2023年10月25日(水) 10：00－11：40
会場：西早稲田キャンパス 55号館S棟510室
講師：Martin Sjödin（ウプサラ大学教授）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：先進理工学部 応用化学科
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
演題：Electroanalytical chemistry for energy applications
日時：2023年10月25日(水) 16：00－17：40
会場：早稲田大学 121号館4階407室
講師：Daniel A. SCHERSON（ケースウェスタンリザーブ大学・教授）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：先進理工学研究科 応用化学専攻
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
From Turkey
1. How did you find out and choose Waseda?
I first found out about Waseda because it was one of the universities that my home university had an exchange program with. So, I expected Waseda was providing high level of academic education. Then, I did my own research to know more about the university as well as the Lab of Prof. Kobayashi. After examining the lab’s own website, I thought that I would like to contribute to the international environment of the lab and work with such respected professor. Finally, I decided to apply for English-based Master program in Waseda.
2. How your impression toward Japan changed before and after you come to Japan?
I had learnt Japanese since I was 12 years old for a few years and had heard about cultural and social events of Japan (such as Sakura-Momiji, Matsuri, Fireworks and so on) as well as some general knowledge about Japan. I had come to Japan many times to travel, so I had a pretty much accurate expectations about my life here. However, my first impression of Japan was being fascinated by its difference from other countries and how excited I felt to explore it as well as how much it had to offer, so I genuinely think that everyone can find a piece of Japan that they can enjoy according to their interests.
3. Daily schedule
Weekdays
I took 5-6 class excluding my lab (studio) class – aiming to finish all required classes in the first year of my master’s. It may sound busy, but I think it is very manageable. I wish there were more classes unique to Japan, especially for foreign students, such as Japanese architecture, structural wood, introductory earthquake-resistant engineering etc. My schedule for Monday & Tuesday – I have 2 classes for each day so I am mainly at school also catching up with work; Wednesday & Friday – I have one class for each day before noon. Thursday is free. Rather than school, I teach English 3 times a week to kids as a part-time job.
Weekends
Weekends are for travelling as much as possible, if not, I still try to explore Tokyo by searching new places to eat, any events to check out and meeting with friends. I went to many places such as Kyoto, Nara, Osaka, Hiroshima and so on. If I suggest one place for an excursion in Tokyo, it is Mt. Takao where you can see the beautiful scenery and also visit Japanese traditional temple. For my hobbies, I attend to a dance school, so I go there 2-3 a week and I practice pottery at Monozukuri studio (inside Waseda FSE campus) once a week. So far, I made cups, mugs and small bowls as gifts for my friends and family. Thursdays are for any activity related to art, design and architecture or research for my thesis.
4. What is the outline of your study field and study plan?
I am a master’s student (1st year, 2nd semester) in architecture department. I am interested in many topics, but my thesis will focus on environmentally sustainable architecture, I am thinking about uniting sustainability strategies in different phases of architecture as design, construction and supervision into a guideline. My thesis will consist of detailed research to create such guideline plus a design project.
5. What is your career goal or future plan after graduation?
I have a very specific goal for now – following my graduation, I want to become a practicing architect and after gaining experience, I want to maintain a career in both teaching and practicing. I believe, academic studies and working with students will keep my theoretical information & creativity fresh, -which would be also beneficial to my practice- whereas; the work experience I get would reflect on the courses I would teach –which would be beneficial for having a solid and updated ground to teach a theoretical course-. I would love to contribute both as a teacher and as an architect.
6. Message to the prospective students
Japan is very different – this might be very exciting to explore but also tiring to adjust. I think it would make it much easier to get to know more about the culture in detail and some basic Japanese. Although Waseda is one of the right places to be, your experience will be different than Japanese students – which is okay. If you focus on yourself, what you want to achieve academically and personally while being here, you will have such a fulfilling unique experience.
演題：Step-by-step towards sustainable light-emitting electrochemical cells: Emitter and Electrolytes
日時：2023年10月23日(月) 15：00－16：40
会場：西早稲田キャンパス 55号館S棟510室
講師：Rubén D. Costa（ミュンヘン工科大学教授）
対象：学部生・大学院生、教職員、学外者、一般の方
参加方法：入場無料、直接会場へお越しください。
主催：先進理工学部 応用化学科
問合せ：早稲田大学 理工センター 総務課
TEL：03-5286-3000
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