Article
Chemistry, Multidisciplinary
Sebastian Ulrich, Xiaopu Wang, Markus Rottmar, Rene Michel Rossi, Bradley J. Nelson, Nico Bruns, Ralph Muller, Katharina Maniura-Weber, Xiao-Hua Qin, Luciano Fernandes Boesel
Summary: This study presents the first photoresist for direct laser writing of photochromic 3D micro-objects via two-photon polymerization, enabling rapid processing of complex microstructures with excellent photoresponsiveness and reversible color-changing. The work provides a new approach for custom microfabrication of 3D photochromic objects with molecularly engineered color and responsiveness.
Article
Environmental Sciences
Gianpaolo Palma, Sara Perry, Paolo Cignoni
Summary: Virtual reality technologies have become popular and affordable, with research showing that mapping real objects in VR alongside haptic feedback can significantly enhance the realism of the experience.
Article
Multidisciplinary Sciences
Cheng Zeng, Maya Winters Faaborg, Ahmed Sherif, Martin J. Falk, Rozhin Hajian, Ming Xiao, Kara Hartig, Yohai Bar-Sinai, Michael P. Brenner, Vinothan N. Manoharan
Summary: In this study, capillary forces are dynamically modulated to move objects in programmable two-dimensional patterns. Machines are designed to translate, rotate, separate, and braid multiple floating objects. This approach provides a quick, inexpensive way to manipulate micrometre-scale particles and braid microwires for high-frequency electronics.
Article
Chemistry, Physical
Ruili He, Kaida Xiao, Michael Pointer, Manuel Melgosa, Yoav Bressler
Summary: The current study aimed to test and optimize the CIELAB and CIEDE2000 color-difference formulas for evaluating the color difference of 3D objects. Through visual experiments and data analysis, it was found that the optimized formulas have better performance.
Article
Multidisciplinary Sciences
Chao Bao, Tae-Ho Kim, Amirhossein Hassanpoor Kalhori, Woo Soo Kim
Summary: Neuromorphic systems provide energy-saving in-memory computing compared with conventional processors. Here, we present a trained neuromorphic humanoid hand that mimics the reflex arc for quick response to complex spatiotemporal information.
Article
Chemistry, Analytical
Min Huang, Xinyuan Gao, Jie Pan, Xiu Li, Caroline Hemingray, Kaida Xiao, Manuel Melgosa
Summary: Based on previous visual assessments, the performance of eight color-difference formulas was tested using the standardized residual sum of squares index. The CIELAB formula was found to be significantly worse than the other seven formulas. Therefore, the CIEDE2000, CAM02, and CAM16-based formulas were considered to be equivalent and cannot be recommended.
Article
Materials Science, Multidisciplinary
Nayem Hossain, Mohammad Asaduzzaman Chowdhury, Md. Bengir Ahmed Shuvho, Mohammod Abul Kashem, Mohamed Kchaou
Summary: This article provides an overview of the versatile applications of 3D printing in engineering and medical fields, discussing various printing methods, materials, and specific applications in engineering and medical equipment.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Chemistry, Physical
Julian Traciak, Jacek Fal, Gawel Zyla
Summary: The paper introduces a low-cost method for building a tensiometer to measure surface tension between liquid and air. By using common devices and manufacturing techniques, the software and CAD models for self-building the tensiometer were provided, showcasing successful application in complex systems.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
David Michael Roper, Kyung-Ah Kwon, Luke Peter Malone, Serena Michelle Best, Ruth Elizabeth Cameron
Summary: This paper presents a novel method to spatially vary the birefringence of FFF parts. The effects of print speed, extrusion factor, and layer separation on birefringence are explored in single PLLA layers. The paper also demonstrates the possibility of using spatially varied birefringence to store data and presents a steganographic technique embedding information within printed parts.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Engineering, Manufacturing
Essyrose Mathew, Brendan F. Gilmore, Eneko Larraneta, Dimitrios A. Lamprou
Summary: The uncertainty of the COVID-19 pandemic has caused shortages in medical consumables and personal protective equipment, with 3D printing playing a crucial role in providing essential items. Antimicrobial materials show potential in manufacturing 3D printed essential products for added protection against pandemics.
3D PRINTING AND ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Manufacturing
Ines Cazin, Milena Olga Gleirscher, Mathias Fleisch, Michael Berer, Marco Sangermano, Sandra Schloegl
Summary: This study presents a dual-wavelength vat photopolymerization 3D printing technique for fabricating objects with multi-material properties using a single vat. The stiffness and flexibility of photopolymers are controlled by two photoreactions at different wavelengths. The experiments confirm the selective network formation and demonstrate distinctive mechanical properties of the printed objects.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Simone Pagliano, Stephan Schroder, Goran Stemme, Frank Niklaus
Summary: Polyimides are high-performance polymeric materials used in various engineering sectors, but their 3D printing has been limited to objects with dimensions in the hundreds of micrometers. This study demonstrates the 3D printing of polyimide objects with sub-micrometer resolution using two-photon polymerization. A negative photosensitive polyimide commonly used in microsystems applications is employed. The compatibility of the 3D objects with elevated temperature operation is demonstrated by characterizing a micro-hotplate at temperatures above 300°C.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Kyung-Eun Min, Jae-Won Jang, Jesik Shin, Cheolhee Kim, Sung Yi
Summary: This study used multiple regression analysis and machine learning models to investigate the dimensional accuracy of fused deposition modeling (FDM) objects. Factors such as support spacing, layer thickness, and raster angle were found to be significant in determining the accuracy of the dimensions.
APPLIED SCIENCES-BASEL
(2023)
Article
Biochemistry & Molecular Biology
Suzana Kutnjak-Mravlincic, Ana Sutlovic, Martinia Ira Glogar, Sanja Ercegovic Razic, Damir Godec
Summary: The research involved post-dyeing ABS specimens with disperse dyes, resulting in products in desired shades with satisfactory abrasion resistance.
Article
Chemistry, Multidisciplinary
Sang Hyun Ji, Da Sol Kim, Min Soo Park, Ji Sun Yun
Summary: By optimizing the drying, debinding, and sintering conditions, this study successfully achieved high strength and density in 3YSZ ceramic 3D-printed objects, expanding their potential applications in various industrial fields.
Article
Multidisciplinary Sciences
Xi Wang, Andreas Ley, Sebastian Koch, James Hays, Kenneth Holmqvist, Marc Alexa
SCIENTIFIC REPORTS
(2020)
Article
Computer Science, Software Engineering
Marc Alexa
Summary: The problem of approximating given shapes with restricted surface normals is addressed in the context of manufacturing shapes. An algorithm is provided to compute maximal interior polytopes and select a subset of offsets to cover the shape, resulting in prescribed Hausdorff error approximations using a small number of primitives.
IEEE COMPUTER GRAPHICS AND APPLICATIONS
(2021)
Article
Computer Science, Software Engineering
M. Kohlbrenner, U. Finnendahl, T. Djuren, M. Alexa
Summary: The study combines face normals with ARAP energy to create an effective tool for shape stylization using mesh representations. This approach allows for flexibility in selecting preferred normal sets and maintains a constant linear system in global optimization, leading to convergence behavior that enables interactive control over optimization parameters. Various examples demonstrate the simplicity and versatility of the approach.
COMPUTER GRAPHICS FORUM
(2021)
Article
Computer Science, Software Engineering
A. Bunge, M. Botsch, M. Alexa
Summary: The construction is applicable to different types of meshes and has high accuracy.
COMPUTER GRAPHICS FORUM
(2021)
Article
Computer Science, Theory & Methods
Marc Alexa
Summary: Tutte's embedding theorem states that a 3-connected graph without certain minor graphs can be embedded in the plane under certain conditions. We extend this result to simply connected tetrahedral meshes, showing that they can be embedded if certain conditions are met. However, these conditions are not necessary and there are additional conditions regarding the graph of the mesh.
DISCRETE & COMPUTATIONAL GEOMETRY
(2023)
Article
Humanities, Multidisciplinary
Xi Wang, Zoya Bylinskii, Aaron Hertzmann, Robert Pepperell
Summary: Visual ambiguity is an important aspect of art perception and has been extensively utilized by modernist and contemporary artists for aesthetic effects. However, the impact of visual ambiguity on aesthetic judgments remains unclear due to the subjective nature of aesthetic experience. In a recent study, Wang et al. (2020) collected a large collection of textual descriptions of artworks and quantified the variability using Shannon entropy, finding that ambiguous images tend to generate a greater number and wider diversity of descriptive terms. In this study, the researchers investigated how well these measures can predict aesthetic preference for ambiguous images and found that entropy measures were correlated with aesthetic ratings, supporting the hypothesis that the number of associations evoked by ambiguous artworks is a factor in judgments of their aesthetic value.
PSYCHOLOGY OF AESTHETICS CREATIVITY AND THE ARTS
(2023)
Article
Computer Science, Information Systems
Hyunsung Cho, Matthew L. Komar, David Lindlbauer
Summary: This article introduces a novel mixed reality approach called RealityReplay, which tracks and visualizes significant events in real time using MR visualization without modifying the physical space. It uses a combination of semantic segmentation and saliency prediction to track important motion events in the users' surroundings, and generates visual summaries of these events. Evaluation results show that RealityReplay significantly enhances the users' sensemaking of temporal motion events compared to memory-based recall.
PROCEEDINGS OF THE ACM ON INTERACTIVE MOBILE WEARABLE AND UBIQUITOUS TECHNOLOGIES-IMWUT
(2023)
Article
Computer Science, Software Engineering
Catarina G. G. Fidalgo, Yukang Yan, Hyunsung Cho, Mauricio Sousa, David Lindlbauer, Joaquim Jorge
Summary: The recent pandemic, war, and oil crises have led to a reevaluation of travel for education, training, and meetings. Remote assistance and training have become increasingly important, and Mixed Reality (MR) offers opportunities to improve these processes. A survey of remote assistance and training in MR environments provides insights into current approaches, benefits, and challenges. The findings highlight gaps and opportunities for further research and development in this field.
IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
(2023)
Proceedings Paper
Computer Science, Information Systems
Yu Jiang, Zhipeng Li, Mufei He, David Lindlbauer, Yukang Yan
Summary: HandAvatar is a technology that allows users to control non-humanoid avatars using their hands. It achieves this by automatically generating joint-to-joint mappings and optimizing control precision, structural similarity, and comfort. Evaluation results show that HandAvatar enables more precise control and requires less physical effort compared to a state-of-the-art body-to-avatar control method. The potential applications of HandAvatar include virtual social interaction, 3D animation composition, and VR scene design.
PROCEEDINGS OF THE 2023 CHI CONFERENCE ON HUMAN FACTORS IN COMPUTING SYSTEMS, CHI 2023
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Xi Wang, Gen Li, Yen-Ling Kuo, Muhammed Kocabas, Emre Aksan, Otmar Hilliges
Summary: In this paper, we propose a method for inferring diverse 3D models of human-object interactions from images. Our method extracts high-level commonsense knowledge from large language models and applies them to perform 3D reasoning of human-object interactions, achieving diverse 3D arrangements of humans and objects.
2022 INTERNATIONAL CONFERENCE ON 3D VISION, 3DV
(2022)
Proceedings Paper
Yi Fei Cheng, Hang Yin, Yukang Yan, Jan Gugenheimer, David Lindlbauer
Summary: Diminished reality (DR) refers to the concept of removing content from a user's visual environment. Through studies on user perception, interaction, and task performance in DR-enabled environments, guidelines for creating DR environments have been defined.
PROCEEDINGS OF THE 2022 CHI CONFERENCE ON HUMAN FACTORS IN COMPUTING SYSTEMS (CHI' 22)
(2022)
Proceedings Paper
Computer Science, Artificial Intelligence
Jaewook Lee, Fanjie Jin, Younsoo Kim, David Lindlbauer
Summary: Current solutions for pedestrian navigation are limited to 2D maps and voice instructions. Mixed Reality (MR) can integrate navigation instructions into users' visual field. However, current MR navigation systems mainly use conventional designs and do not fully explore the technological possibilities. Two experiments were conducted to evaluate navigation instructions and the impact of different contexts. The findings suggest that familiar designs like arrows are well-rated, while alternatives such as avatars or desaturation of non-target areas are also viable. The results provide guidelines for MR content creators and future MR navigation systems.
2022 IEEE CONFERENCE ON VIRTUAL REALITY AND 3D USER INTERFACES (VR 2022)
(2022)
Proceedings Paper
Computer Science, Artificial Intelligence
Adrian Spurr, Aneesh Dahiya, Xi Wang, Xucong Zhang, Otmar Hilliges
Summary: The study introduces a new self-supervised method for 3D hand pose estimation, focusing on the impact of invariance and equivariance in contrastive learning for pose estimation.
2021 IEEE/CVF INTERNATIONAL CONFERENCE ON COMPUTER VISION (ICCV 2021)
(2021)
Proceedings Paper
Computer Science, Cybernetics
Xi Wang, Zoya Bylinskii, Monica S. Castelhano, James Hillis, Andrew T. Duchowski
Summary: Eye movement recording is widely used in HCI, but the connection between eye movements and cognitive state still needs further exploration. The virtual EMICS workshop provides an opportunity to discuss the application scenarios of inferring users' mental state from eye movements.
EXTENDED ABSTRACTS OF THE 2021 CHI CONFERENCE ON HUMAN FACTORS IN COMPUTING SYSTEMS (CHI'21)
(2021)
Article
Psychology, Mathematical
Xi Wang, Kenneth Holmqvist, Marc Alexa
Summary: A new algorithmic method is introduced to align recall fixations with encoding fixations, showing good performance in identifying important regions in images and aligning recall fixations with them across different scenarios.
BEHAVIOR RESEARCH METHODS
(2021)
