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Dynamic Modeling and Experimental Verification of an RPR Type Compliant Paralle Mechanism with Low Orders

Chinese Journal of Mechanical engineering 2024年第3期37卷 83-94页

作者： Shuang Zhang Jingfang Liu Huafeng Ding Yanbin Zhang School of Mechatronics Engineering Henan University of Science and TechnologyLuoyangHenanChina Faculty of Materials and Manufacturing College of Mechanical Engineering and Applied Electronics TechnologyBeijing University of TechnologyBeijingChina Key laboratory of advanced manufacturing technology Beijing University of TechnologyBeijingChina School of Mechanical Engineering and Electronic Information China University of Geosciences(Wuhan)WuhanChina Center of Machinery Equipment Advanced Manufacturing of Henan Province LuoyangChina

Efficiency of calculating a dynamic response is an important point of the compliant mechanism for posture *** modeling with low orders of a 2R1T compliant parallel mechanism is studied in the *** mechanism with two out-of-plane rotational and one lifting degrees of freedom(DoFs)plays an important role in posture *** on elastic beam theory,the stiffness matrix and mass matrix of the beam element are established where the moment of inertia is *** improve solving efficiency,a dynamic model with low orders of the mechanism is established based on a modified modal synthesis ***,each branch of the RPR type mechanism is divided into a ***,a set of hypothetical modes of each substructure is obtained based on the C-B ***,dynamic equation of the whole mechanism is established by the substructure assembly.A dynamic experiment is conducted to verify the dynamic characteristics of the compliant mechanism.

关键词： Compliant parallel mechanism Dynamic model Modal synthesis method Dynamic experiment

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Biocompatibility for In-Body Biotelemetry Devices: A Review of Antenna Design and Materials 1

Biocompatibility for In-Body Biotelemetry Devices: A Review ...

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1st IEEE International Conference on Communication engineering and Emerging Technologies, ICoCET 2024

作者： Jazimin Bin Mohd Idrus, Muhammad Afif Zulkefli, Muhammad Solihin Izzuddin Bin Wan Zahalan, Wan Muhammad Jack, Soh Ping Mat, Mohd Hafizuddin Faculty of Electronic Engineering & Technology Perlis02600 Arau Malaysia Oulu90014 Finland Faculty of Electronic Engineering & Technology Advanced Communiation Engineering Centre of Excellent Perlis Malaysia

ISBN: (纸本)9798331504144

In-body biotelemetry devices, especially implantable and ingestible antennas, have revolutionized healthcare by allowing remote physiological monitoring. This review examines two key methods: biocompatible encapsulation and the use of biocompatible substrates and superstrates for antenna biocompatibility. It discusses the challenges of electromagnetic interference in the human body and the importance of antennas for wireless connectivity in biomedical devices. The paper also explores the under-researched link between biocompatibility and antenna design, highlighting the role of materials like polydimethylsiloxane (PDMS), polyetheretherketone (PEEK), alumina, and zirconia in antenna optimization. It reviews operating frequency choices from the Medical Device Radio Communication Service band to Industrial Scientific and Medical bands, considering signal propagation, interference, and regulatory compliance. The research favors encapsulation across frequencies, especially 2400-2483.5 MHz, while the less-used substrate/superstrate method offers potential antenna performance benefits but requires a complex design process. The findings provide a comprehensive understanding of the complex relationship between biocompatibility and antenna design, guiding future research in this evolving field. © 2024 IEEE.

关键词： Biotelemetry

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Induction of Apoptosis of Melanoma Skin Cancer Cells by Atmospheric Plasma Jet

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Plasma Medicine 2023年第4期13卷 55-69页

作者： Abdullah, Zulaika Zaaba, S.K. Mustaffa, M.T. Saidin, N.A. Mohtar, J.A. Faculty of Electronic Engineering & Technology Universiti Malaysia Perlis Malaysia Faculty of Mechanical Engineering & Technology Universiti Malaysia Perlis Malaysia Advanced Medical and Dental Institute Universiti Sains Malaysia Malaysia Faculty of Chemical Engineering & Technology Universiti Malaysia Perlis Malaysia

The apoptotic effect is an important issue in cancer treatment. To achieve this goal, an atmospheric plasma jet (APJ) was set up for use on cultured cells in a temperature-controlled environment. Melanoma skin cancer and normal skin cells were targeted with this device. Following a 5 s plasma exposure, there was a 67% cell death in melanoma skin cancer cells compared with 5% in normal skin cells as measured after 24 h. When the treatment time was increased to 15, a 98% cell death was reported for melanoma skin cancer cells, which was 80% greater than the cell death in normal skin cells. Our observations further indicate that this preferential cell death is largely due to apoptosis. It shows that an APJ is a selective device in the induction of apoptosis in cancer and normal cells. APJ was shown to affect cells directly and indirectly through a plasma-activated medium (PAM). In direct treatment, cells were exposed to plasma while suspended in a culture medium, and in indirect treatment, cells were added to a culture medium previously acti-vated by plasma treatment. PAM was able to induce cell death 29% higher than direct treatment as measured after 48 h. The depth of the growth medium is also one of the factors in the induction of apoptosis of cancer cells. The growth medium protected the cells from plasma exposure. The result shows that the low level (0 mm) of growth medium will cause more cell death as compared with the high level (2 mm) of growth medium. Apoptotic behavior of skin cancer cells was de-duced from the fact that treated cells initially grew and died 12 h following the treatment, while untreated cells continued to grow and proliferate. © 2023 by Begell House, Inc.

关键词： Cell death

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Generation of OAM Waves and Analysis of Mode Purity for 5G Sub-6 GHz Applications

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Computers, Materials & Continua 2023年第1期74卷 2239-2259页

作者： Shehab Khan Noor Arif Mawardi Ismail Mohd Najib Mohd Yasin Mohamed Nasrun Osman Nurulazlina Ramli Ali H.Rambe J.Iqbal Advanced Communication Engineering(ACE) Centre of ExcellenceFaculty of Electronic Engineering TechnologyUniversiti Malaysia PerlisKangarPerlisMalaysia Centre for Advanced Electrical&Electronic System(CAEES)Faculty of Engineering Built Environment and Information TechnologySEGi University Petaling JayaSelangorMalaysia Department of Electrical Engineering Universitas Sumatera UtaraMedan20155Indonesia School of Electrical and Electronic Engineering Engineering CampusUniversiti Sains MalaysiaNibong Tebal14300PenangMalaysia Faculty of Engineering&Technology Gomal University29050 kpkPakistan

This article presents the generation of Orbital AngularMomentum(OAM)vortex waves with mode 1 using Uniform Circular Array(UCA)*** different designs,namely,UCA-1(4-element array antenna)and UCA-2(8-element array antenna),were designed and fabricated using FR-4 substrate to generate OAM mode 1 at 3.5 GHz(5G mid-band).The proposed antenna arrays comprised rectangular microstrip patch elements with inset fed *** elements were excited by a carefully designed feeding phase shift network to provide similar output energy at output ports with desired phase shift *** generated OAM waves were confirmed by measuring the null in the bore sight of their 2D radiation patterns,simulated phase distribution and intensity *** measurement results agree well with the simulation ***,a detailed mode purity analysis of the generated OAM waves was carried out considering different *** investigation found that the greater the number of elements,the higher the purity of the generated OAM *** with other previous works,the proposed antenna design of this paper is very simple to design and *** addition,the proposed antennas are compact in design even at lower frequency band with very wide bandwidth to meet the requirements of 5G mid-band applications.

关键词： Orbital angular momentum vortex waves fifth generation wireless communications uniform circular array antenna patch antenna

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Compact Parasitic Patch Antenna Array with Beam Steering Capabilities 1

Compact Parasitic Patch Antenna Array with Beam Steering Cap...

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1st IEEE International Conference on Communication engineering and Emerging Technologies, ICoCET 2024

作者： Mat, Mohd Hafizuddin Anuar, Muhammad Aiman Hakim M. Abd Wahab, Nurul Husna Ramli, Nur Hidayah Bahari, Norfatihah Zahid, Liyana Zulkefli, Muhammad Solihin Advanced Communication Engineering Centre of Excellence Universiti Malaysia Perlis Faculty of Electronic Engineering & Technology Perlis Malaysia Universiti Malaysia Perlis Faculty of Electronic Engineering & Technology Perlis Malaysia Universiti Malaysia Perlis Faculty of Electrical Engineering & Technology Perlis Malaysia

ISBN: (纸本)9798331504144

This study focuses on the design and optimization of a compact parasitic patch antenna array endowed with beam steering capabilities. With the current demand for smaller, more efficient antennas that can dynamically adjust their radiation patterns, traditional designs are becoming inadequate. This research aims to develop a compact antenna array that not only meets stringent size constraints but also excels in key performance metrics such as gain, bandwidth, and efficiency. By utilizing Rogers R04003C material, which ensures higher gain bandwidth, and incorporating beam steering mechanisms, the antenna can dynamically change the direction of its radiation pattern, crucial for applications such as radar, wireless communication, and satellite communication. © 2024 IEEE.

关键词： Bandwidth

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A 3.5 GHz Single-Band Rectifier For 5G RF Energy Harvesting Systems 1

A 3.5 GHz Single-Band Rectifier For 5G RF Energy Harvesting ...

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1st IEEE International Conference on Communication engineering and Emerging Technologies, ICoCET 2024

作者： Yunus, Raja Nor Azrin Raja Adam, Ismahayati Yasin, Mohd Najib Mohd Muhamad, Wan Zuki Azman Wan Ghaleb, Abdulrahman Amin Ahmed Universiti Malaysia Perlis Faculty of Electronic Engineering Technology Perlis Arau Malaysia Universiti Malaysia Perlis Faculty of Electronic Engineering Technology Centre of Excellence for Advanced Communication Engineering Perlis Arau Malaysia

ISBN: (纸本)9798331504144

Motivated by the increasing demand for efficient energy harvesting in next-generation wireless applications, this paper introduces a 3.5 GHz single-band rectifier designed for RF energy harvesting systems, employing a single-stub matching network technique. The rectifier utilizes a single diode and is constructed on an RT/Duroid 5880 substrate, with dimensions of 25 mm x 12 mm x 1.575 mm. Simulation and measurement results indicate efficiencies of 62.08% and 59.38% at 0 dBm input power, respectively. The rectifier delivers a rectified voltage of 1.702 V DC across a 3 kΩ load (RL) at an input power of 10 dBm. The rectifier's ability to efficiently harvest energy from low-power inputs makes it ideal for 5G technologies, indicating its potential to be integral in creating self-sustaining 5G networks. © 2024 IEEE.

关键词： 5G mobile communication systems

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Development of Android Application for Intelligent 2D Breast Cancer Visualization 1

Development of Android Application for Intelligent 2D Breast...

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1st IEEE International Conference on Communication engineering and Emerging Technologies, ICoCET 2024

作者： Vijayasarveswari, V. Nadeson, Pavitraa Fwen Hoon, Wee Mahrom, Norfadila Centre of Excellence Universiti Malaysia Perlis Faculty of Electronic Engineering Technology Perlis Malaysia Universiti Malaysia Perlis Faculty of Electronic Engineering Technology Perlis Malaysia Universiti Malaysia Perlis Advanced Computing Centre of Excellence Universiti Malaysia Perlis Faculty of Electronic Engineering Technology Perlis Malaysia

ISBN: (纸本)9798331504144

Most often affecting women after puberty, breast cancer is one of the most common cancer-related disorders globally. Even though the condition kills thousands of people every year, if it is discovered promptly, it can usually be treated. Therefore, quick and accurate detection techniques are essential for the patient's survival. In the past, medical professionals used manual detection methods to achieve this goal. Most of the researches usually focusing more on detecting compared to visualizing. Visualizing Breast cancer is important so many people can understand their condition easily. The goal of this research is to create a new Android application that will visualize the detected breast cancer in 2D environment using Android based smartphone. This in project, there are two phases. Phase 1 is data preparation for the visualization and phase 2 visualization of tumor in 2D environment. In this process, data is extracted from Matlab and it visualize in mobile application. The data is processed by using machine learning. The detected tumor is visualizes using Android based smart phone. The application is developed by using 000webhost, MySQL and Android Studio. The utilization of android applications is quite advantageous as they advance technology and provide consumers with a variety of viewpoints. It is able to handle and visualize these data better than other standard systems. To test the system, we initially tried it with 10 data sets. Once 10 data are appropriately visualized. To check its functionality, we added more data, Additionally, the application can help user to understand the state of their breast health without the expertise. © 2024 IEEE.

关键词： Diseases

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UWB Microstrip Patch Antenna for Dielectric Material Measurement System 1

UWB Microstrip Patch Antenna for Dielectric Material Measure...

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1st IEEE International Conference on Communication engineering and Emerging Technologies, ICoCET 2024

作者： Tan, Chin Shen Hoon Wee, Fwen Seok Yew, Been Veeraperumal, Vijayasarveswari Universiti Malaysia Perlis Faculty of Electronic Engineering & Technology Pauh Perlis Malaysia Universiti Malaysia Perlis Advanced Communication Engineering Faculty of Electronic Engineering & Technology Pauh Perlis Malaysia Universiti Sultan Zainal Abidin Faculty of Innovative Design and Technology Terengganu Malaysia

ISBN: (纸本)9798331504144

This paper presents the development of an Ultra-Wideband (UWB) Microstrip Patch Antenna for dielectric measurement systems, aimed at overcoming the bandwidth limitations of conventional monopole antennas. The antenna design evolved from a hexagonal (50.0 mm x49.8 mm) to an octagonal structure (59.6 mm x60.3 mm), expanding the bandwidth from 2.38 GHz to 11.38 GHz and improving performance metrics such as gain and S11 return loss. The design process, using CST simulation software, employed an FR-4 substrate with a thickness of 1.6 mm and a dielectric constant of r=4.3 • Key results include a bandwidth exceeding 8.5 GHz, gains of 5.634 dB at 6.5GHz and 5.418 dB at 12 GHz, and an efficiency of over 97.5% across multiple frequencies. Different materials were tested, showing varied resonance and efficiency, with glass providing strong resonance and White Eraser offering wide response. The antenna meets and exceeds performance objectives, providing broad bandwidth, high performance, and accurate dielectric measurements. This work advances UWB antenna technology, offering significant contributions to electronics and telecommunications by introducing efficient and intelligent antenna solutions. © 2024 IEEE.

关键词： Ultra-wideband (UWB)

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Wavelength-interval switchable Brillouin–Raman random fiber laser through Brillouin pump manipulation

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Chinese Physics B 2024年第7期33卷 374-379页

作者：李阳徐恩明陈睿佳 Yu-Gang Shee 张祖兴 Advanced Photonic Technology Laboratory College of Electronic and Optical Engineering&College of MicroelectronicsNanjing University of Posts and TelecommunicationsNanjing 210023China Department of Electrical and Electronic Engineering Lee Kong Chian Faculty of Engineering&Science(LKC FES)Universiti Tunku Abdul Rahman(UTAR)Sungai Long CampusMalaysia

A wavelength-interval switchable Brillouin–Raman random fiber laser(BRRFL) based on Brillouin pump(BP) manipulation is proposed in this paper. The proposed wavelength-interval switchable BRRFL has a full-open cavity configuration, featuring multiwavelength output with wavelength interval of double Brillouin frequency shifts. Through simultaneously injecting the BP light and its first-order stimulated Brillouin-scattered light into the cavity, the laser output exhibits a wavelength interval of single Brillouin frequency shift. The wavelength-interval switching effect can be manipulated by controlling the power of the first-order stimulated Brillouin scattering light. The experimental results show the multiwavelength output can be switched between double Brillouin frequency shift multiwavelength emission with a broad bandwidth of approximately 60 nm and single Brillouin frequency shift multiwavelength emission of 44 nm. The flexible optically controlled random fiber laser with switchable wavelength interval makes it useful for a wide range of applications and holds significant potential in the field of wavelength-division multiplexing optical communication.

关键词： wavelength-interval switchable fiber laser Brillouin fiber laser stimulated Brillouin-scattered random fiber laser

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Comparative Analysis of Trilateration and Fingerprinting for Wi-Fi-Based Human Localization 1

Comparative Analysis of Trilateration and Fingerprinting for...

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1st IEEE International Conference on Communication engineering and Emerging Technologies, ICoCET 2024

作者： Tang, Shelvine Ibrahim, Siti Zuraidah Md Zain, Aini Syuhada Tantiviwat, Sugchai Universiti Malaysia Perlis Faculty of Electronic Engineering & Technology Perlis Malaysia Universiti Malaysia Perlis Faculty of Electronic Engineering & Technology Center of Excellence for Advanced Communication Engineering Perlis Malaysia Perlis Malaysia Rajamangala University of Technology Srivijaya Faculty of Industrial Education and Technology Department of Electrical Education Songkhla Thailand

ISBN: (纸本)9798331504144

This study compares two Wi-Fi-based human localization techniques - trilateration and Wi-Fi fingerprinting - within a controlled indoor environment using three strategically placed Wi-Fi access points (APs). Trilateration estimates user positions by calculating distances from the APs based on Received Signal Strength Indicator (RSSI) values, while Wi-Fi fingerprinting matches real-time RSSI readings to a pre-constructed database using the K-Nearest Neighbors (KNN) algorithm. Conducted in a university hostel bedroom, the experiments evaluated the algorithms across five positions. Trilateration faced limitations from signal attenuation and multipath effects, achieving correct localization in only 3 out of 5 positions. In contrast, Wi-Fi fingerprinting matches real-time RSSI readings to a pre-constructed database using the K-Nearest Neighbors (KNN) algorithm, yielding superior results by correctly identifying 4 out of 5 positions. Optimized with k = 3, Wi-Fi fingerprinting achieved 76.50% overall accuracy and 75.30% validation accuracy. These findings demonstrate Wi-Fi fingerprinting as a more reliable method for indoor localization in complex environments. © 2024 IEEE.

关键词： Wi-Fi

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