检索结果-内蒙古大学图书馆

Meter-scale heterostructure printing for high-toughness fiber electrodes in intelligent digital apparel

Nature Communications 2025年第1期16卷 1-10页

作者： Lee, Gun-Hee Lee, Yunheum Seo, Hyeonyeob Jo, Kyunghyun Yeo, Jinwook Kim, Semin Bae, Jae-Young Kim, Chul Majidi, Carmel Kang, Jiheong Kang, Seung-Kyun Ryu, Seunghwa Park, Seongjun Medical Research Center Seoul National University Seoul South Korea Departments of Cogno-Mechatronics Engineering and Optics & Mechatronics Engineering Pusan National University Busan South Korea Department of Bio and Brain Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon South Korea Program of Brain and Cognitive Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon South Korea Department of Mechanical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon South Korea Graduate School of Semiconductor Technology Korea Advanced Institute of Science and Technology (KAIST) Daejeon South Korea Department of Materials Science and Engineering Seoul National University Seoul South Korea Department of Mechanical Engineering Carnegie Mellon University Pittsburgh PA United States Department of Chemistry Seoul National University Seoul Seoul South Korea School of Transdisciplinary Innovations Seoul National University Seoul South Korea Department of Biomedical Science College of Medicine Seoul National University Seoul South Korea Interdisciplinary Program in Bioengineering College of Engineering Seoul National University Seoul South Korea Department of Transdisciplinary Medicine Seoul National University Hospital Seoul South Korea

Intelligent digital apparel, which integrates electronic functionalities into clothing, represents the future of healthcare and ubiquitous control in wearable devices. Realizing such apparel necessitates developing meter-scale conductive fibers with high toughness, conductivity, stable conductance under deformation, and mechanical durability. In this study, we present a heterostructure printing method capable of producing meter-scale (~50 m) biphasic conductive fibers that meet these criteria. Our approach involves encapsulating deformable liquid metal particles (LMPs) within a functionalized thermoplastic polyurethane matrix. This encapsulation induces in situ assembly of LMPs during fiber formation, creating a heterostructure that seamlessly integrates the matrix’s durability with the LMPs’ superior electrical performance. Unlike rigid conductive materials, deformable LMPs offer stretchability and toughness with a low gauge factor. Through precise twisting using an engineered annealing machine, multiple fiber strands are transformed into robust, electrically stable meter-scale electrodes. This advancement enhances their practicality in various intelligent digital apparel applications, such as stretchable displays, wearable healthcare systems, and digital controls. © The Author(s) 2025.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Intelligent Access Control Mechanism for Ubiquitous Applications

Intelligent Access Control Mechanism for Ubiquitous Applicat...

引用

International Conference on Computer and Information Science (ACIS)

作者： Tae-Hum Lim Sang-Uk Shin Department of Interdisciplinary Program of Mechatronics Engineering Pukyong National University South Korea

As computing technology becomes more pervasive and mobile services are deployed, ubiquitous applications will need flexible access control mechanisms and more suitable access control decisions. Despite the advances in access control approaches applicable to ubiquitous applications, there remain issues that impede the development of effective access control for ubiquitous applications. Amongst them are the lack of context-based models for access control, and reliance on identity or capability-based access control schemes. In this paper, we propose intelligent system using a neural network algorithm for ubiquitous applications, which extends the role based access control with context constraints. Also we apply a neural network algorithm for making access decisions.

关键词： Intelligent control Access control Neural networks Mobile computing Intelligent networks Personal digital assistants Application software Intelligent systems Permission Pervasive computing

来源：评论

学校读者我要写书评

暂无评论

Effect of mouth-opening levels on sound field gain in the ear canal 45

Effect of mouth-opening levels on sound field gain in the ea...

引用

45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future, INTER-NOISE 2016

作者： Xiao, Jimg-Hong Yu, Jen-Fang Lee, Kun-Che Chiu, Hsiu-Hui Graduate Institute of Medical Mechatronics Chang Gung University Taiwan Taiouan Interdisciplinary Otolaryngology Laboratory Chang Gung University Taiwan Ph.D. Program in Biomedical Engineering College of Engineering Chang Gung University Taiwan

The human ear canal can become deformed when the mouth opens and closes, changing the sound field in the external auditory canal. Thus, measuring the mandibular movement trajectory may provide a reference for identifying mouth-opening levels. The human ear canal can become deformed when the mouth opens and closes, changing the sound field in the external auditory canal. Thus, measuring the mandibular movement trajectory may provide a reference for identifying mouth-opening levels. The K7 system and a Frye Fonix 7000 sensor were used to perform several measurements of mouth-opening and -closing to obtain the mean maximal mouth opening level. The mandible was fixed at the 1/3, 2/3, and maximal mouth-opening levels. Subsequently, a 65-dB sweep tone, which is the sound pressure level of people talking at a normal level, was adopted as the sound stimulus to measure sound fields at 5, 10, 15, and 20 mm from the entrance of the external auditory canal. The stimulus frequencies of 200, 500, 1000, 2000, 4000, 6000, and 8000 Hz were noted. The differences in sound field gains at depths of 5, 10, 15, and 20 mm were analyzed for the various mouth-opening levels. The results show that except for the 1.70-dB decrease at a depth of 5 mm with an 8000-Hz stimulus frequency, the differences at the other depths and stimulus frequencies were within 1 dB. Thus, the mouth-opening levels will influence the gain in ear canal. © 2016, German Acoustical Society (DEGA). All rights reserved.

关键词： Acoustic fields

来源：评论

学校读者我要写书评

暂无评论

A study of the collision detection of robot manipulator without torque sensor

A study of the collision detection of robot manipulator with...

引用

ICROS-SICE International Joint Conference 2009, ICCAS-SICE 2009

作者： Je, Hwan-Wook Baek, Jun-Young Lee, Min-Cheol Interdisciplinary Program in Mechatronics Pusan National University Busan Korea Republic of Department of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea Republic of School of Mechanical Engineering Pusan National University Busan Korea Republic of

ISBN: (纸本)9784907764333

In this study, we proposed the collision observer for real-time detection of collisions between service robot and unknown obstacle. In case of a mobile equipped extra manipulator such as a service robot the safety of the system in service field is very important because a collision between the manipulator and a person may damages against the one. Therefore it is required to detect the collision against the unknown obstacle and to make them safe. This paper proposes current based method to detect unexpected collision without using extra sensor such as the force/torque(F/T), tactile sensor or the visual sensor. Instead of these sensors, the collision is detected by the observer for collision. To detect the collision of the manipulator without force/torque sensor, two parameters are only required for calculation of collision observer. One is current value, the other is control input value. Because the current from the servo amplifier is generated to follow the controller command input, the current can be used for detecting the collision. After detecting the collision of robot manipulator, we can control the robot to make them safe or reduce damage. The proposed collision detection method is implemented in a light weight robot manipulator. It is confirmed that the proposed method is valid by experimental results. © 2009 SICE.

关键词： Robot applications

来源：评论

学校读者我要写书评

暂无评论

Performance analysis of UPS(Ultrasonic Positioning System) using DGPS

Performance analysis of UPS(Ultrasonic Positioning System) u...

引用

IECON 2004 - 30th Annual Conference of IEEE Industrial Electronics Society

作者： Kim, Su Yong Lee, Dong Hwal An, Hee Tae Lee, Sang Hun Koh, Young Ho Lee, Man Hyung Department of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea Republic of Department of Interdisciplinary Program in Mechatronics Pusan National University Busan Korea Republic of School of Mechanical Engineering Pusan National University Busan Korea Republic of

In this paper, the position of a mobile robot using DGPS(Differential GPS) and UPS(UItrasonic Positioning System) is measured and the performance of UPS is analyzed using DGPS. UPS is absolute positioning system using ultrasonic waves and has better performance in low price than the other absolute positioning systems. So in order to evaluate the performance, UPS is compared with the RTK(Real-Time Kinematics) method, which is of the most accurate methods in the DGPS. As a result, the possibility of using UPS can be discussed as pseudolites or pseudo-satellites in the place where GPS is not available. © 2004 IEEE.

关键词： Mobile robots

来源：评论

学校读者我要写书评

暂无评论

Ultrasonic satellite system for the positioning of mobile robots

Ultrasonic satellite system for the positioning of mobile ro...

引用

IECON 2004 - 30th Annual Conference of IEEE Industrial Electronics Society

作者： Lee, Jung-Min Lee, DongHwal An, HeeTae Huh, Nam Kim, Myoung Kook Lee, Man Hyung Departement of Interdisciplinary Program in Mechatronics Pusan National University Busan Korea Republic of Departement of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea Republic of School of Mechanical Engineering Pusan National University Busan Korea Republic of

The positioning problem of mobile robot is an important part of control problem for mobile robot. Dead Reckoning is widely used for positioning of mobile robot. However this method has problems because it accumulates estimation errors. In this paper, we propose a new method to increase the accuracy of estimated position using the U-SAT(Ultrasonic Satellite system). U-SAT is composed of a distance measurement using ultrasonic wave and the position acquisition in the world coordinate using the GPS. It is shown that we will be able to estimate the position of mobile robot precisely, in which errors are not accumulated. The experimental results show that the proposed method is enable to estimate the position of the mobile robot. © 2004 IEEE.

关键词： Mobile robots

来源：评论

学校读者我要写书评

暂无评论

Control of robot manipulator for storing cord blood in cryogenic environments

Control of robot manipulator for storing cord blood in cryog...

引用

ICROS-SICE International Joint Conference 2009, ICCAS-SICE 2009

作者： Lee, Seung-Heui Jeong, Do-Young Kim, Ik-Soo Lee, Dong-In Cho, Dong-Yeon Lee, Min Cheol RIMT Pusan National University Busan Korea Republic of Interdisciplinary Program in Mechatronics Pusan National University Busan Korea Republic of R and D Center ENK Co. Ltd. Busan Korea Republic of School of Machine Engineering Pusan National University Busan Korea Republic of

ISBN: (纸本)9784907764333

This paper studies a control method for the manipulator of an automatic cryogenic storing vessel which can improve a ratio of survival of a cord blood. The cord blood keeps in liquid nitrogen in the cryogenic vessel. The integrated robot control system for storing a cord blood based on mechanism of SCARA robot is developed. The system consists of a cryogenic vessel, a robot arm controller using a multi motion controller(MMC) board, and control program. The robot manipulator consists of four axes. Each axis consists of a rotation of a major lid, a rotation of a minor lid, a rotation of periscope and a linear motion of periscope. The main software has functions of operating task, dynamic simulator, three dimensional animation, and trajectory planning. To overcome a difficulty to detect collision between canister and the pin of a slot in a rack of the vessel, a collision detection algorithm for the robot is proposed. The trajectory tracking performance of these algorithms are evaluated by implementing to design SCARA type robot using MMC board which has conventional PID control algorithm. To improve performance of the integrated system, the proposed algorithm for the collision avoidance is applied to the end-effector of the robot manipulator. © 2009 SICE.

关键词： Computer software

来源：评论

学校读者我要写书评

暂无评论

A study for estimating reaction force of robot arm by using PDSPO

A study for estimating reaction force of robot arm by using ...

引用

International Conference on Ubiquitous Robots and Ambient Intelligence (URAI)

作者： Hyun Hee Kim Sun Oh Park Jin Ho Kyung Hyun Min Do Min Cheol Lee Interdisciplinary Program in Robotics Pusan National University Busan Korea School of Mechanical Engineering Pusan National University Busan Korea Department of Robotics and Mechatronics Korea Institute of Machinery and Materials Daejeon Korea

In the industrial field, assembling parts using robot arm requires force information. Some robot arms with torque sensors are commercially available, but they are difficult to use for industrial applications due to durability problems. In addition, mounting a torque sensor on the robot arm increases manufacturing costs and complicates the structure. In this study, we apply Sliding Perturbation Observer (SPO) to 7-axis robot manipulator and estimate reaction force without using torque sensor in simulation. From the estimated perturbation, it can be determined whether the end effector of the robot manipulator will crash part of the assembly.

关键词： Manipulators Service robots Robot sensing systems Collision avoidance Observers Force

来源：评论

学校读者我要写书评

暂无评论

Research on navigation system of an autonomous vehicle using RTK-DGPS

Research on navigation system of an autonomous vehicle using...

引用

Annual Conference of Industrial Electronics Society

作者： Jae Heon Ryu Yu Shin Chang Gun Hong Park Chun Han Lee Seok Hyun Park Man Hyung Lee Departement of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea Departement of Interdisciplinary Program in Mechatronics Pusan National University Busan Korea School of Mechanical Engineering Pusan National University Busan Korea

ISBN: (纸本)0780387309

This paper describes the development of navigation system for an autonomous ground vehicle at limited area by using RTK-DGPS. Before the autonomous drive, we make map data by using RTK-DGPS that is a reference trajectory for the autonomous vehicle. The navigation system with map data computes the yaw angle of the vehicle by using its present position and next position. And the steering wheel of the vehicle is controlled by using fuzzy logic controller. A prototype of the autonomous vehicle by the navigation method is developed and navigation performance of the system is evaluated. The experimental results show that the navigation system based RTK-DGPS can exactly track the map at the low speed. We expect that this navigation system can be more accurate by augmenting other sensors.

关键词： Navigation Remotely operated vehicles Mobile robots Land vehicles Trajectory Vehicle driving Wheels Fuzzy logic Prototypes Sensor systems

来源：评论

学校读者我要写书评

暂无评论

Ultrasonic satellite system for the positioning of mobile robots

Ultrasonic satellite system for the positioning of mobile ro...

引用

Annual Conference of Industrial Electronics Society

作者： Jung-Min Lee Dong Hwal Lee HeeTae An Nam Huh Myoung Kook Kim Man Hyung Lee Departement of Interdisciplinary Program in Mechatronics Pusan National University Susan Korea Departement of Mechanical and Intelligent Systems Engineering Pusan National University Busan Korea School of mechanical Engineering Pusan National University Busan Korea

ISBN: (纸本)0780387309

The positioning problem of mobile robot is an important part of control problem for mobile robot. Dead Reckoning is widely used for positioning of mobile robot. However this method has problems because it accumulates estimation errors. In this paper, we propose a new method to increase the accuracy of estimated position using the U-SAT (Ultrasonic Satellite system). U-SAT is composed of a distance measurement using ultrasonic wave and the position acquisition in the world coordinate using the GPS. It is shown that we will be able to estimate the position of mobile robot precisely, in which errors are not accumulated. The experimental results show that the proposed method is enable to estimate the position of the mobile robot.

关键词： Satellites Mobile robots Robot kinematics Global Positioning System Orbital robotics Service robots Estimation error Distance measurement Uncertainty Machine vision

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：