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Instructional design and Implementation of an Inquiry-Based Laboratory Class for Undergraduate engineering Students

Biomedical engineering Education 2025年 1-9页

作者： Leo, Chen Huei Sockalingam, Nachamma Tan, Mei Xuan Zhu, Yajuan Khoo, Xiaojuan Department of Biomedical Engineering College of Design and Engineering National University of Singapore Singapore Republic of Singapore Science Math and Technology Singapore University of Technology & Design Singapore Republic of Singapore SUTD Academy Singapore University of Technology and Design Singapore Republic of Singapore

Laboratory classes are indispensable in the teaching of biomedical engineering education, offering students invaluable hands-on experience and opportunities for practical application of theoretical knowledge. However, without a deep understanding of the underlying principles, students may find themselves merely going through the motions, executing protocols without grasping their significance from the procedures. This lack of conceptual understanding undermines the educational value of laboratory experiences and impedes the development of critical-thinking and problem-solving skills. To address this, we described the implementation of design-centric, inquiry-based learning activities into challenge-based laboratory class for “Science and Technology for Healthcare” course in Singapore University of Technology and design, where students (n = 162) can design and troubleshoot experiments, allowing deeper appreciation of scientific process and laboratory methodology. Specifically, students were tasked to (1) design and develop a paper-based glucose detection method and (2) use the developed method to identify glucose among the given unknown samples. After the class, students’ perception and report of the laboratory class were surveyed. Overall, the students agreed that challenge-based laboratory class enabled them to explore and think critically about experiments and promoted problem-solving skills, but they tended to feel less confident in performing the experiment without clear step-by-step instructions. This can be attributed to unfamiliar pedagogies, where in most cases, traditional laboratory classes are conducted by providing students with detailed experimental instructions for students to follow. Despite the uncertainty toward challenge-based laboratory class, most students agreed that they would like to have more of such laboratory classes in future.

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A Binary PSO Based Ensemble Under-Sampling Model for Rebalancing Imbalanced Training Data

arXiv

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arXiv 2025年

作者： Li, Jinyan Wu, Yaoyang Fong, Simon Tallón-Ballesteros, Antonio J. Yang, Xin-She Mohammed, Sabah Department of Computer and Information Science University of Macau Taipa China Department of Languages and Computer Systems University of Seville Seville Spain Design Engineering and Math School of Science & Technology Middlesex University London United Kingdom Department of Computer Science Lakehead University Thunder Bay Canada

Ensemble technique and Under-sampling technique are both effective tools for resolvig imbalanced dataset classification problems, which commonly denotes the quantitative imbalance of a binary class dataset where minority class is the target class. In this paper, a novel ensemble method absorbing the advantages of both ensemble learning for biasing classifiers and a new evolutional under-sampling method is proposed. The under-sampling method is named Binary PSO instance selection, it gathers with ensemble classifiers to find the most suitable length and combination of majority class samples to build a new dataset with minority class samples. The proposed method adopts multi-objective strategy, objectives of this method is to improve the performances of imbalanced classification and to guarantee the maximum integrity of the original dataset. We examined our proposed method, the Binary PSO instance selection by comparing its performance of processing imbalanced dataset with several other conventional basic ensemble methods. Experiments are also conducted with Binary PSO instance selection wrapping with ensemble classifiers for further improvement of imbalanced classification. Based on comaprison experiments, our proposed methods outperform single ensemble methods, state-of-the-art under-sampling methods as well as their combinations with traditional PSO instance selection algorithm. Copyright © 2025, The Authors. All rights reserved.

关键词： Data assimilation

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A DFT study on brittle-to-ductile transition of D022-TiAl3 using multi-doping and strain-engineered effects

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Journal of Materials Science & Technology 2020年第16期47卷 180-192页

作者： Boon Teoh Tan Shunnian Wu Franklin Anariba Ping Wu Entropic Interface Croup Engineering Product DevelopmentSingapore University of Technology and DesignSingapore Materials Surface Group Science and Math Affiliated to Engineering Product DevelopmentSingapore University of Technology and DesignSingapore

In this work,the thermodynamic,mechanical properties and electronic behaviors of D022-TiAl3 doped with W and 15 groupⅣM(M=C,Ge,Pb,Si and Sn)dopants are investigated by DFT *** established that ductility can be improved using multi-doping approach and revealed the mechanisms behind such brittle-to-ductile *** addition,it is found that there is linearity between changes in Young’s modulus and tensile/compre s sive strain *** alternate insight into brittle-to-ductile transition during ductile mode cutting of brittle materials is proposed.

关键词： Multi-doped TiAl3 Brittle-to-Ductile transition Elastic properties First-principles calculation Strain-engineered

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3D printed nutritious snacks from orange peel waste

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Materials Today: Proceedings 2022年 70卷 12-16页

作者： Leo, Chen Huei Lee, Cheng Pau Foo, Su Yi Tan, Joseph Choon Wee Tan, Jian Da Ong, Eng Shi Hashimoto, Michinao Science Math & Technology Singapore University of Technology and Design 8 Somapah Road Singapore 487372 Singapore Pillar of Engineering Product Development Singapore University of Technology and Design 8 Somapah Road Singapore 487372 Singapore

The discarded section of an orange fruit, orange peel waste (OPW), is well-recognised as a rich source of vitamins and nutrients that can be turned into high-value-added food products. OPW is produced in millions of tonnes over the world and returned to the environment with little benefit. As a result, there is an urgent need to develop better methods to effectively upcycle the industry's enormous volume of OPW produced yearly. Recent advances in 3D printing technology have enabled food to be created into unique and complex 3D structures with potential benefits to health and environment. Thus, the objective of this research is to develop a method to upcycle OPW into healthy snacks using 3D printing technology such as direct ink writing (DIW). Using DIW 3D printing, an edible 3D structures of orange peels using rheology-modified inks containing OPW was successfully fabricated. Furthermore, OPW also contains bioflavonoids and exhibit antioxidant activity. Therefore, this study provided an example of a feasible method to upcycle food waste into high value food products, which pave an avenue to achieve food sustainability and circularity of food waste management using 3D food printing as a technological vehicle. © 2022

关键词： Sustainable development

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3D food printing – Asian snacks and desserts

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Materials Today: Proceedings 2022年 70卷 611-615页

作者： Pant, Aakanksha Zhang, Yi Kai Chua, Chee Jia Yao Tan, Justin Hashimoto, Michinao Huei Leo, Chen Hooi Chuan Wong, Gladys Tan, U-Xuan Engineering Product Development Pillar Singapore University of Technology and Design Singapore 487373 Singapore School of Electronic Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China Digital Manufacturing and Design Centre Singapore University of Technology and Design Singapore 487373 Singapore Science Math and Technology Singapore University of Technology and Design Singapore 487373 Singapore Nutrition & Dietetics Department Khoo Teck Puat Hospital Singapore 768828 Singapore

‘3D food printing technology is a rapidly advancing technology offering customization in nutrition, shape, taste and texture. Popular foods can be created in exciting and visually appealing forms through 3DFP. In this paper, we demonstrate the 3D printability of rice flour mixed with chai poh powder to recreate familiar Asian dish, chwee kueh. 3DFP of yam paste and gingko nut was also conducted for orh nee dish recreation. Extrusion printing was the chosen technique to 3D print different shapes. Two commercially available food printers were used to test these two food ink formulations. Further experimentation is required to improve and characterize the food inks with additional ingredients like sugar, oil to achieve better printability as well as taste and texture’. © 2022

关键词： Nutrition

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Narrative-driven multimedia tagging and retrieval: Investigating design and practice for speech-based mobile applications 1

Narrative-driven multimedia tagging and retrieval: Investiga...

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1st Workshop on Speech, Language and Audio in Multimedia, SLAM 2013

作者： Singh, Abhigyan Larson, Martha Industrial Design Delft University of Technology Netherlands Electrical Engineering Math and Computer Science Delft University of Technology Netherlands

This paper presents a design concept for speech-based mobile applications that is based on the use of a narrative storyline. Its main contribution is to introduce the idea of conceptualizing speech-based mobile multimedia tagging and retrieval applications as a story that develops via interaction of the user with characters representing elements of the system. The aim of this paper is to encourage and support the research community to further explore and develop this concept into mature systems that allow for the accumulation and access of large quantities of speech-annotated images. We provide two resources intended to facilitate such work: First, we describe two applications, together referred as the 'Verbals Mobile System', that we have developed on the basis of this design concept, and implemented on Android platform 2.2 (API level 8) using Google's Speech Recognition service, Text-to-Speech Engine and Flickr API. The code for these applications has been made publically available to encourage further extension. Second, we distill our practical findings into a discussion of technology limitations and guidelines for the design of speechbased mobile applications, in an effort to support researchers to build on our work, while avoiding known pitfalls. Copyright © 2013 for the individual papers by the papers' authors.

关键词： Multimedia services

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3D food printing– sustainability through food waste upcycling

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Materials Today: Proceedings 2022年 70卷 627-630页

作者： Hooi Chuan Wong, Gladys Pant, Aakanksha Zhang, Yi Kai Chua, Chee Hashimoto, Michinao Huei Leo, Chen Tan, U-Xuan Nutrition & Dietetics Department Khoo Teck Puat Hospital Singapore 768828 Singapore Engineering Product Development Pillar Singapore University of Technology and Design Singapore 487373 Singapore School of Electronic Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China Digital Manufacturing and Design Centre Singapore University of Technology and Design Singapore 487373 Singapore Science Math and Technology Singapore University of Technology and Design Singapore 487373 Singapore

‘Circular economy’ and ‘zero waste economy’ are not just 21st century terms but are increasingly becoming part of mainstream narrative to lead an ethical and environmentally conscious life which benefits not just humans but the entire ecosystem. Innovative approaches are being targeted to achieve this mission, one being revalorization of food waste to value added products. Food wastage occurs from the initial steps of agricultural produce to industrial manufacturing and processing, to retail and household consumption. The greatest culprit in generating waste is the common households. 3D food printing (3DFP) is one of the emerging technologies that can be effectively utilized to target food wastes from different sources. Consumer acceptance of food waste as edible food still has many barriers. 3DFP can help rescue certain waste types to generate customized and personalized beautiful designs familiar in taste and form for easier acceptability. We have demonstrated the 3D printability of jackfruit seeds that are often underutilized and discarded as waste. Subjecting the waste to simple and effective cooking techniques helped to prepare food ink suitable for 3D printing. Further studies are planned to improve and characterize the inks further to achieve better prints. © 2022

关键词： 3D printers

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Broadband strong optical dichroism in topological Dirac semimetals with Fermi velocity anisotropy

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Chinese Physics B 2020年第7期29卷 128-134页

作者： J Lim K J A Ooi C Zhang L K Ang Yee Sin Ang Science Math and TechnologySingapore University of Technology and DesignSingapore School of Energy and Chemical Engineering Xiamen University MalaysiaSelangor Darul Ehsan 43900Malaysia College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005China School of Physics University of WollongongNorthfields AvenueNew South Wales 2522Australia

Prototypical three-dimensional(3D)topological Dirac semimetals(DSMs),such as Cd3As2 and Na3Bi,contain electrons that obey a linear momentum-energy dispersion with different Fermi velocities along the three orthogonal momentum *** being extensively studied in recent years,the inherent Fermi velocity anisotropy has often been neglected in the theoretical and numerical studies of 3D *** this omission does not qualitatively alter the physics of light-driven massless quasiparticles in 3D DSMs,it does quantitatively change the optical coefficients which can lead to nontrivial implications in terms of nanophotonics and plasmonics *** we study the linear optical response of 3D DSMs for general Fermi velocity values along each *** the signature conductivity-frequency scaling,σ(ω)∝ω,of 3D Dirac fermion is well-protected from the Fermi velocity anisotropy,the linear optical response exhibits strong linear dichroism as captured by the universal extinction ratio scaling law,Λi j=(vi/v j)^2(where i=j denotes the three spatial coordinates x,y,z,and vi is the i-direction Fermi velocity),which is independent of frequency,temperature,doping,and carrier scattering *** Cd3As2 and Na3Bi3,an exceptionally strong extinction ratio larger than 15 and covering a broad terahertz window is *** findings shed new light on the role of Fermi velocity anisotropy in the optical response of Dirac semimetals and open up novel polarization-sensitive functionalities,such as photodetection and light modulation.

关键词： topological Dirac semimetal optical anisotropy linear dichroismn linear response theory

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Hybrid learning experience for the Mexican Energetic Reform

Hybrid learning experience for the Mexican Energetic Reform

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International Conference on Interactive Collaborative and Blended Learning, ICBL 2015

作者： García-Castelán, Rosa María Guadalupe Physics and Math Department School of DesignEngineering and Architecture Tec de Monterrey Campus Ciudad de México Mexico City Mexico

ISBN: (纸本)9781509002405

The understanding of the Mexican Energetic Reform as an immediate application of the acquired knowledge in the Electricity and Magnetism Course at Tecnológico de Monterrey Campus Ciudad de México (Tec de Monterrey - CCM) is presented. Hybrid learning activities were designed to fully exploit and transform the classroom experience. Ethical reflections and citizenship discussions added an out-of-the-box perspective to this fundamental Physics Course. © 2015 IEEE.

关键词： Teaching

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Analysis of Convective Transport of Temperature-Dependent Viscosity forNon-Newtonian Erying Powell Fluid: A Numerical Approach

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Computers, Materials & Continua 2021年第1期66卷 675-689页

作者： Ahlam Aljabali Abdul Rahman Mohd Kasim Nur Syamilah Arifin Sharena Mohamad Isa Noor Amalina Nisa Ariffin Centre for Mathematical Sciences UMPGambang26300Malaysia Faculty of Computer and Math Sciences UiTM JohorPasir Gudang CampusMasai81750Malaysia Manufacturing Engineering Technology Section UniKLItaly Design InstituteKuala Lumpur56100Malaysia

Non-Newtonian is a type of fluid that does not comply with the viscosity under the Law of Newton and is being widely used in industrial *** include those related to chemical industries,cosmetics manufacturing,pharmaceutical field,food processing,as well as oil and gas *** inability of the conventional equations of Navier–Stokes to accurately depict rheological behavior for certain fluids led to an emergence study for non-Newtonian fluids’*** line with this,a mathematical model of forced convective flow on non-Newtonian Eyring Powell fluid under temperature-dependent viscosity(TDV)circumstance is *** fluid model is embedded with the Newtonian heating(NH)boundary condition as a heating circumstance and is assumed to move over a stretching sheet acting *** appropriate similarity variables,the respective model was converted into ordinary differential equations(ODE),which was later solved utilizing the Keller box *** present model is validated by comparing the existing output in literature at certain special limiting cases,where the validation results display a firm *** current outputs for the proposed model are shown in tabular and graphical form for variation of skin friction plus Nusselt number,velocity and temperature distribution,respectively.

关键词： Temperature-dependent viscosity erying powell fluid vertical stretching sheet numerical solution boundary layer

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