Article
Chemistry, Multidisciplinary
Yimin Wu, Zhuangzhuang Zhou, Shuai Shao, Zhizhong Zhao, Kaixun Hu, Sijie Wang
Summary: Based on the monitoring of Yulinzi Tunnel in Gansu Province, this study analyzes the temporal and spatial deformation characteristics of loess tunnels during excavation. The results show that the tunnel's arch undergoes significant deformation and twisting. The overall deformation of the tunnel is related to the excavation sequence and changes with time according to the exponential distribution law.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Multidisciplinary
Irene Chiesa, Carmelo De Maria, Giovanni Vozzi, Riccardo Gottardi
Summary: Each year, thousands of patients face life-threatening ear, nose, and throat disorders, such as tracheal stenosis, or conditions that affect their psychosocial well-being, such as microtia. Tissue engineering offers an exciting alternative by creating bioartificial constructs using three-dimensional scaffolds and human cells that can grow and develop. Bioprinting technologies, which utilize additive manufacturing, are particularly useful in addressing the complex geometries of ear, nose, and throat, allowing for the creation of patient-specific scaffolds with high design flexibility and repeatability.
Article
Construction & Building Technology
Yuchen Wang, Bin Yu, Xiaoyu Zhang, Jia Liang
Summary: This paper develops a 3D laser scanning system and corresponding methods for the extraction and evaluation of pavement texture depth. The proposed methods have high accuracy and provide a reference for autonomous detection of pavement performance.
AUTOMATION IN CONSTRUCTION
(2022)
Article
Multidisciplinary Sciences
Hong-Joon Yoon, Geumbee Lee, Jin-Tae Kim, Jae-Young Yoo, Haiwen Luan, Shyuan Cheng, Soohyeon Kang, Huong Le Thien Huynh, Hyeonsu Kim, Jaehong Park, Joohee Kim, Sung Soo Kwak, Hanjun Ryu, Jihye Kim, Yeon Sik Choi, Hak-Young Ahn, Junhwan Choi, Seyong Oh, Yei Hwan Jung, Minsu Park, Wubin Bai, Yonggang Huang, Leonardo P. Chamorro, Yoonseok Park, John A. Rogers
Summary: Recently reported winged microelectronic systems provide a passive flight mechanism for dispersal in environmental monitoring and other applications. By utilizing environmentally degradable materials, these systems can remotely assess multiple environmental parameters through colorimetry. Experimental and theoretical investigations reveal important design considerations, including the geometry and mass distribution of the structures.
Article
Environmental Sciences
Dongfeng Jia, Weiping Zhang, Yanping Liu
Summary: This study presents a systematic method for analyzing tunnel deformation, including a rapid and high-accuracy point-cloud registration method using a positioning base made in the laboratory and an improved moving least-squares method for reconstructing the tunnel centerline from unorganized point clouds.
Article
Chemistry, Analytical
Yulong Han, Haili Sun, Ruofei Zhong
Summary: This study proposes a method to restore the linearity of point clouds obtained by mobile laser scanning based on the measured track center line. Experimental results show that this method can process tunnel point cloud data more accurately and quickly, reducing errors and deformations in tunnel data processing.
Article
Materials Science, Multidisciplinary
Alperen Abaci, Gulden Camci-Unal, Murat Guvendiren
Summary: Three-dimensional (3D) bioprinting is an emerging technology that can fabricate functional tissues and organs, replicating native tissue function. With its precise positioning of cellular materials and utilization of medical images, 3D bioprinting has enormous potential in biomedical applications, such as tissue engineering and regenerative medicine. It is a rapidly progressing field that has shown clinically relevant uses.
Article
Chemistry, Multidisciplinary
Dezhi Zhu, Ming Qiao, Jianfeng Yan, Jiawang Xie, Heng Guo, Shengfa Deng, Guangzhi He, Yuzhi Zhao, Ma Luo
Summary: Transition metal chalcogenides, a special type of 2D material, have unique optoelectronic properties and have been used to fabricate various optoelectronic devices. However, controllable fabrication of complex nanostructures on 2D materials remains a challenge. In this study, a method to create designed 3D patterns on the MoS2 surface using ultrafast laser modulation was proposed.
Article
Multidisciplinary Sciences
Qiao Liang, Junjie Xu, Yuanguo Wei
Summary: The impact of cyclic footage and intermediate principal stress on the stability of the tunnel-face area is analyzed using the theory of limit analysis in this study. The study introduces the unified strength theory and proposes three-dimensional logarithmic spiral failure modes with corresponding velocity fields. The influence of various parameters on the tunnel-face area stability is analyzed, and it is found that different factors should be prioritized depending on the internal friction angle. When using the double shear uniform strength theory in the tunnel-face area, the intermediate principal stress can improve the stability of the tunnel face.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Civil
Xiaolin Weng, Hangfei Yu, Haoshuang Niu, Jibo Hu, Weiwei Han, Xiaoming Huang
Summary: This study investigates the influence mechanism of a new crossing tunnel on an existing tunnel by conducting centrifugal tests and three-dimensional numerical analysis. It is found that regardless of the sequence of crossing, the existing tunnel experiences vertical stretching. The under-pass construction of the new tunnel has a more significant impact on the internal force and deformation of the existing tunnel compared to the above-crossing. The clearance between the old and new tunnels affects the stress ratio, load-bearing arch formation, and deformation range.
TRANSPORTATION GEOTECHNICS
(2022)
Article
Materials Science, Multidisciplinary
Hadis Gharacheh, Murat Guvendiren
Summary: Currently available bone grafts are insufficient and lack tissue complexity. 3D bioprinting is an advanced technology that can develop vascularized bone tissue with complexity. This article reviews the technologies, bioinks, and strategies for vascularization in 3D bioprinting.
Review
Engineering, Civil
Xu Wang, Mingnian Wang, Ruolan Jiang, Jiani Xu, Bingtian Li, Xiao Wang, Jianle Yu, Pengfei Su, Chaopeng Liu, Qianru Yang, Mingyu Lei, Xiaoxuan Liao
Summary: Regular observation and measurement during tunnel construction are crucial for ensuring safety and stability. Traditional total station methods have limitations, while advances in machine vision and sensor technology offer new solutions for tunnel monitoring and measurement.
JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
(2023)
Article
Physics, Multidisciplinary
Tobias Kree, Michael Koehl
Summary: In this paper, we propose a method for three-dimensional sculpting of laser beams using two-dimensional holograms. By utilizing an improved numerical phase retrieval algorithm, we are able to generate continuous three-dimensional intensity distributions of arbitrary shapes without prior knowledge of the light field properties. We validate our algorithm by benchmarking it against optical bottle beams and double-helix beams, and further extend it to complex optical structures.
Article
Chemistry, Multidisciplinary
Nadav Opatovski, Yael Shalev Ezra, Lucien E. Weiss, Boris Ferdman, Reut Orange-Kedem, Yoav Shechtman
Summary: The study introduces a novel method for efficient multicolor 3D particle tracking over a large field of view, achieved through multiplexed point-spread-function engineering. The technique has been successfully demonstrated for tracking five types of emitters in vitro and colocalization of DNA loci in live yeast cells.
Article
Engineering, Geological
Xiangyun Zhou, Luqiang He, De'an Sun
Summary: This study establishes a mathematical model using a cylindrical heat source to simulate the temperature field in the nuclear waste repository. By using the integral transformation method, the partial differential equations of heat conduction are transformed into ordinary differential equations and semi-analytical solutions for temperature change are obtained. The radial temperature distribution around the waste canister is analyzed and compared with other analytical models. The model is then used to determine the canister spacing for different types of canister panels with variable tunnel spacing. The results show that the model can predict both near-field and far-field temperature around the waste canister, and the decay heat power at initial installation and thermal properties have significant effects on the canister spacing.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2022)
