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2010 Solid-State sensors, Actuators, and Microsystems Workshop

作者： Nam, K.H. Choi, W. Yeo, J. Ko, S.H. Lin, Liwei Berkeley Sensor and Actuator Center University of California BerkeleyCA United States Research Center of MEMS Space Telescope Ewha Womans University Korea Republic of LG Innotek Inc Korea Republic of Department of Mechanical Engineering Korea Advanced Institute of Science and Technology Korea Republic of

ISBN: (纸本)0964002485

A planar, integrated total internal reflection (TIR) sensor for the characterizations of biofouling has been demonstrated based on angular interrogation of Fraunhofer diffraction. This sensor is made of a two-mask process to have optical prism and built-in waveguides of 4×0.25μm2 in cross section area. The core and cladding layer of the waveguide are made of silicon nitride and silicon dioxide, respectively and a 780nm in wavelength light source is used in the experiments. Water, ethanol, acetone and glycerol, have all been tested to illustrate the basic refractive index sensing principle of the prototype sensor. Biofouling measurements show that after been immersed into milk as the testing liquid, the surface refractive index of a prototype TIR sensor shifted continuously to as much as 0.0089 for a 9-hour test. As such, this technique could be useful to various biofouling control and monitoring applications, including water desalination, medical, marine and electronic device industries. © 2010TRF.

关键词： Refractive index

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Efficient, real-time short address allocations for USN devices using LAA (Last Address Assigned) algorithm

Efficient, real-time short address allocations for USN devic...

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9th International Conference on advanced Communication technology (ICACT 2007)

作者： Jeon, Ho-In Kim, Yeonsoo Dept. Electronic Engineering Kyung-Won University South Korea Ubiquitous Sensor Network Division Advanced Technology Lab. KT South Korea

ISBN: (纸本)9788955191318

In this paper, we proposed an efficient way of allocating short addresses in real-time for the USN (Ubiquitous sensor Network) devices. By the "efficient" we mean that the 16-hit address space is never wasted. The proposed addressing mechanism is based upon the information of the Last Address Assigned (LAA) that is delivered over the beacon every time it is transmitted. In contrast to the ZigBee hierarchical block addressing based on C-skip address blocks, the proposed scheme is not a systematic way of allocating short addresses and thus tree-routing is not available. However, it has great advantages when real applications for U-City services are considered. Moreover, the proposed mechanism can provide mobility of the USN devices, expandability of the wireless network, and fast device discovery.

关键词： USN IEEE 802.15.4 ZigBee hierarchical block addressing LAA (Last Address Assigned) mobility of wireless devices

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Green synthesis of platinum/gold bimetallic nanoparticles supported onto hydrotalcite surface as heterogeneous catalyst for selective oxidation of glycerol

Green synthesis of platinum/gold bimetallic nanoparticles su...

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2011 AIChE Annual Meeting, 11AIChE

作者： Tongsakul, Duangta Thammacharoen, Chuchaat Ekgasit, Sanong Nishimura, Shun Ebitani, Kohki Sensor Research Unit Chulalongkorn University Bangkok Thailand School of Materials Science Japan Advanced Institute of Science and Technology Nomi Japan

ISBN: (纸本)9780816910700

Platinum/Gold bimetallic (Pt/Au) nanoparticles were successfully synthesized by green synthesis method in aqueous solution under mild condition using polysaccharide as a protecting agent as well as a reducing agent. The metal nanoparticles were supported on hydrotalcite (HT) surface by sol immobilization method and further utilized as heterogeneous catalyst. The surface morphology and compositions of supported platinum/gold (PtAu/HT) were analyzed by XRD and ICP-MS. The lattice parameter calculated from XRD diffraction pattern (111) of PtmAu100-m exhibited linearly with their compositions only at low Pt concentrations (i.e., 20 and 40% Pt). However the result XRD pattern support that Pt/Au metal might be formed the partially alloy or partially phase segregation at high Pt concentrations, (i.e., 60, 80, and 90% Pt). The catalysis of PtmAu100-m/HT (1 wt%) were evaluated for glycerol oxidation in base-free aqueous solution using molecular oxygen as an oxidant (glycerol/metal = 700 mol/mol). The moderate activities of PtmAu100-m/HT also remain with increasing of Au amount to 20%, in addition, the increasing of Au amount more than this value resulting decreased of an activity. It is due to the PtmAu100-m/HT particles size become larger with Au amount. However, the increasing of glycerol/metal ratio to 500 mol/mol was clearly seen that the presence of Au in Pt metal improved the selectivity toward glyceric acid, especially, Pt 80Au20/HT catalyst. This phenomenon is explained by the synergistic effect of Pt/Au bimetallic resulting in the decreasing of the undesired product.

关键词： Glycerol

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Cross-Modal Graph Semantic Communication Assisted by Generative AI in the Metaverse for 6G

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Research 2024年第2期2024卷 19-27页

作者： Mingkai Chen Minghao Liu Congyan Wang Xingnuo Song Zhe Zhang Yannan Xie Lei Wang Key Laboratory of Broadband Wireless Communication and Sensor Network Technology Nanjing University of Posts and TelecommunicationsNanjng 210003China State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts and TelecommunicationsNanjing 210023China

Recently, the development of the Metaverse has become a frontier spotlight, which is an important demonstration of the integration innovation of advanced technologies in the Internet. Moreover, artificial intelligence (AI) and 6G communications will be widely used in our daily lives. However, the effective interactions with the representations of multimodal data among users via 6G communications is the main challenge in the Metaverse. In this work, we introduce an intelligent cross-modal graph semantic communication approach based on generative AI and 3-dimensional (3D) point clouds to improve the diversity of multimodal representations in the Metaverse. Using a graph neural network, multimodal data can be recorded by key semantic features related to the real scenarios. Then, we compress the semantic features using a graph transformer encoder at the transmitter, which can extract the semantic representations through the cross-modal attention mechanisms. Next, we leverage a graph semantic validation mechanism to guarantee the exactness of the overall data at the receiver. Furthermore, we adopt generative AI to regenerate multimodal data in virtual scenarios. Simultaneously, a novel 3D generative reconstruction network is constructed from the 3D point clouds, which can transfer the data from images to 3D models, and we infer the multimodal data into the 3D models to increase realism in virtual scenarios. Finally, the experiment results demonstrate that cross-modal graph semantic communication, assisted by generative AI, has substantial potential for enhancing user interactions in the 6G communications and Metaverse.

关键词： modal frontier guarantee

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Study of segmentation algorithm based on corneal endothelial cell images 2

Study of segmentation algorithm based on corneal endothelial...

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2nd International Conference on Materials, Transportation and Environmental Engineering, CMTEE 2014

作者： Yang, Ru Min Wang, Shuai Yu, Cheng Bo Hu, Jing Jing Yang, Yi Ju Remote Test and Control Institute Chongqing University of Technology Chongqing China Time grating sensor and advanced detection technology City key Laboratory of Chongqing Chongqing China

ISBN: (纸本)9783038352488

In this paper, we study an an algorithm for accurately extracting the outline of Corneal Endothelial Cell images according to the structure and feature of the corneal endothelial cells. Firstly, we reduce the influence of uneven exposure to segmentation effect using histogram equalization. Secondly, reduce the image noise by Gaussian filtering. At last, research the classical algorithm of image segmentation through the contrast experiment and then select a simple and effective local NiBlack dynamic threshold algorithm. The experimental result shows that this processing method is not only simple, but also can segment the corneal endothelial cell images clearly, and provides a good foundation of data for accurate identification of the following images. © (2014) Trans Tech Publications, Switzerland.

关键词： Image segmentation

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Human 3D Reconstruction and Identification Using Kinect sensor

Human 3D Reconstruction and Identification Using Kinect Sens...

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International Conference on Computational Approach in Smart Systems Design and Applications (ICASSDA)

作者： Chai Joon Lip Ahmad Shakaff Ali Yeon Latifah Munirah Kamarudin Kamarulzaman Kamarudin Retnam Visvanathan Ahmad Firdaus Ahmad Zaidi Syed Muhammad Mamduh Ammar Zakaria Wan Mohd Nooriman School of Mechatronic Engineering Universiti Malaysia Perlis Arau Malaysia Center of Excellence for Advanced Sensor Technology Universiti Malaysia Perlis Arau Malaysia

ISBN: (纸本)9781538683705

3D model of human body has been widely used in many applications including medical, health and security, since it is able to provide information on human body shape. This paper proposes a method to identify human based on the 3D model of the body and the depth data form the Kinect. The system firstly utilizes the coordinate points from the 3D model to calculate the selected anthropometry features of human body. Then, the features are compared with real time Kinect's depth acquisition to perform pose recognition and human identification. Eight candidates were involved in the reliability test of the system with each of them performed 6 trials, making a total of 48 trials. The overall reliability of the system in identifying the correct candidate was found to be 79.167%.

关键词： Three-dimensional displays Solid modeling Robot sensing systems Iris recognition Fingerprint recognition Image reconstruction Mathematical model

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Advances in load cell technology for medical applications

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Medical Device and Diagnostic Industry 2006年第8期28卷 82-89页

作者： Mokhbery, Javad Futek Advanced Sensor Technology Inc. Irvine CA

The advancements in load cell technology including miniaturization and automation in medical devices are making them more applicable in various other fields. Load Cells are transducers that convert force or weight into an electrical signal used for measuring and sensing applications in every industry. The latest technology is microelectromechanical systems (MEMS) which includes disposable blood pressure sensors and angioplasty devices to measure pressure in balloon catheters. In Endoscopy, the load cells monitor the force of the instruments against the tissue, thereby greatly improve the surgical accuracy. To control or monitor patient movement during magnetic resonance imaging (MRI), load cells are used to detect movement and monitor any loss of strength. These sensors are also used to monitor irregular pressure changes during pregnancy to help prevent premature birth defects in high-risk pregnancies.

关键词： Biomedical equipment

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Recognition of Limonene Volatile Using Interdigitated Electrode Molecular Imprinted Polymer sensor

Recognition of Limonene Volatile Using Interdigitated Electr...

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International Conference on Intelligent Systems, Modelling and Simulation (ISMS)

作者： Huzein Fahmi Hawari Nurul Maisyarah Samsudin Mohd Noor Ahmad Ali Yeon Md Shakaff Supri. A. Ghani Yufridin Wahab Uda Hashim Centre of Excellence for Advanced Sensor Technology (CEASTech) Universiti Malaysia Perlis Malaysia Institute Nano Electronic Engineering Universiti Malaysia Perlis Malaysia

Limonene is a type of terpene hydrocarbons commonly produced by plants and known to possess a strong smell of oranges. Electronic nose (e-nose) is an artificial olfaction device that is able to replicate the human olfactory sense. By using Interdigitated Electrode (IDE) structure, an enose sensor for detecting Limonene volatile by using molecular imprinted polymer (MIP) was fabricated. The MIP membrane contained the methacrylic acid, which formed specific cavities originated by target molecule. The ingredients for MIP were then polymerized on the surface of IDE with PET as substrate which is low in cost. The sensing property was examined in gas phase for evaluate the sensor sensitivity and selectivity. The IDE MIP sensor is capable to detect Limonene contained gas. The sensor characteristics were strongly influenced by the composition ratio of crosslinker, functional monomer and template molecule. The remained molecule on MIP can be removed by immersing thus the sensor can be used repeatedly. By determining Limonene volatile released during pre-matured until matured period, one could use this as a data point to determine certain fruit maturity. Apart from monitoring fruit maturity, this sensor can also be use for those who have respiratory allergy towards Limonene where most reported cases of irritation have involved long-term industrial exposure to the pure compound, e.g. during degreasing or the preparation of paints.

关键词： Polymers Electrodes Computational modeling Capacitance Software Metals

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Wearable heart Rate Monitor using photoplethysmography for motion 3

Wearable heart Rate Monitor using photoplethysmography for m...

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3rd IEEE Conference on Biomedical Engineering and Sciences, IECBES 2014

作者： Sudin, Sukhairi Aziz, Fezri Mohd Hishamuddin, Najwa Amanina Ahmad Saad, Fathinul Syahir Md Shakaff, Ali Yeon Zakaria, Ammar Salleh, Ahmad Faizal Centre of Excellence for Advanced Sensor Technology Universiti Malaysia Perlis Lot 21 Taman Muhibah Jejawi-Permatang 02600 Arau Perlis Malaysia

ISBN: (纸本)9781479940844

Heart rate variability (HRV) extracted from human physiological turn to be important data as indicators of human health. Originally, HRV calculated and monitored from Electrocardiography (ECG) signal. This research proved that photoplethysmography (PPG) as a simple non-invasive method can measure HRV in motion condition. PPG used Light Photo sensor (LPS) to capture light reflectance intensity on the finger. The signal is sampled, filtered, processed and sent wirelessly through ZigBee protocol. The system applied on glove to make it wearable and easy to wear. Experimental results show that the system functioning properly with HRV received, displayed and recorded by the base station. © 2014 IEEE.

关键词： Photoplethysmography

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Perovskite light-emitting/detecting bifunctional fibres for wearable LiFi communication

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Light(Science & Applications) 2020年第1期9卷 441-449页

作者： Qingsong Shan Changting Wei Yan Jiang Jizhong Song Yousheng Zou Leimeng Xu Tao Fang Tiantian Wang Yuhui Dong Jiaxin Liu Boning Han Fengjuan Zhang Jiawei Chen Yongjin Wang Haibo Zeng MIIT Key Laboratory of Advanced Display Materials and Devices Institute of Optoelectronics&NanomaterialsSchool of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China Peter Grünberg Research Center Laboratory of Broadband Wireless Communication and Sensor Network TechnologyMinistry of EducationNanjing University of Posts and TelecommunicationsNanjing 210003China

Light fidelity(LiFi),which is emerging as a compelling technology paradigm shifting the common means of highcapacity wireless communication technologies,requires wearable and full-duplex compact design because of its great significance in smart wearables as well as the‘Internet of Things’.However,the construction of the key component of wearable full-duplex LiFi,light-emitting/detecting bifunctional fibres,is still challenging because of the conflicting process between carrier separation and recombination,as well as the highly dynamic film-forming ***,we demonstrate light-emitting/detecting bifunctional fibres enabled by perovskite QDs with hybrid *** hybrid perovskite inks endow fibres with super-smooth QD ***,combined with the small exciton binding energy and high carrier mobility of perovskite QDs,enables successful integration of electroluminescence and photodetection into *** bifunctional fibres possess the narrowest electroluminescence full width at half maximum of ~19 nm and,more importantly,the capability for simultaneously transmitting and receiving *** successful fabrication of narrow emission full-duplex LiFi fibres paves the way for the fabrication and integration of low crosstalk interoperable smart wearables.

关键词： process perovskite functional

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