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Effect of the antenna slot numbers and position on the performance of microwave ablation

Medicine in Novel Technology and Devices 2023年第4期20卷 105-113页

作者： Sabiha Binte Aziz Md Rejvi Kaysir Md Jahirul Islam Torikul Islam Mahmudur Rahman Department of Biomedical Engineering(BME) Khulna University of Engineering&TechnologyKhulna-9230Bangladesh Photonics Research Group Department of EEEKhulna University of Engineering&TechnologyKhulna-9230Bangladesh Department of Electrical and Computer Engineering Waterloo Institute for NanotechnologyUniversity of Waterloo200 University AveWaterlooONCanada Department of Biomedical Engineering(BME) New Jersey Institute of TechnologyNewarkNJUSA Department of Electrical and Electronic Engineering Dhaka University of Engineering&TechnologyGazipur 1707Bangladesh

Microwave ablation(MWA)is a type of thermal ablation used for cancer treatment in interventional *** induce localized tissue heating MWA employs electromagnetic waves within the microwave energy spectrum,which is done by the precisely designed *** study substantially emphasizes the design and performance ameliorating of slot(both single and double)antennae and compares the results with conventional monopole antennae in terms of temperature distribution,specific absorption ratio(SAR),and thermal tissue damage *** simulation has been done in COMSOL by solving the Bioheat equation along with Maxwell electromagnetic equations using the finite element *** simulation results reveal that the double-slot antenna has the most accurate and directional heat dissipation for liver tumors as well as the highest tissue damage rate and *** highest SAR was found to be 3500 W/kg and 3350 W/kg at the implant depth of 61 mm and 63 mm for double and single-slot antennae,*** addition,the fastest tissue damage occurred near the upper slot of the double-slot *** study helps to understand the basic design parameters for enhancing single and doubleslot antennae performance.

关键词： Microwave ablation(MWA) Finite element method(FEM) Liver tumor Microwave antenna Specific absorption rate(SAR)

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Seafloor Imaging Maps by Incorporating Side Scan Sonar Technology on Hybrid Autonomous Underwater Glider 6

Seafloor Imaging Maps by Incorporating Side Scan Sonar Techn...

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6th International Seminar on Research of Information Technology and Intelligent Systems, ISRITI 2023

作者： Atmaja, Ardian Budi Kusuma Hidayat, Egi Muhammad Idris Riyanto Trilaksono, Bambang Siregar, Simon Habibullah, Natsir School of Electrical Engineering and Informatics Institut Teknologi Bandung Bandung Indonesia Institut Teknologi Bandung Telkom University Doctoral Program of Electrical Engineering Department Computer Engineering Faculty of Applied Science Indonesia

ISBN: (纸本)9798350358346

This research aims to construct a two-dimensional image to represent an underwater geometry map with a Side Scan Sonar (SSS) mounted on a Hybrid Autonomous Underwater Glider (HAUG). Building the underwater map has two stages of the process. The first stage is preprocessing which includes Time-varying gains (TVG), slant range correction, and ground range correction. The second is HAUG navigation, the movement of HAUG orientation to the angle and distance of SSS readings and plotting the geometry of the grid map. With these two stages, a two-dimensional grid map will be formed. Meanwhile, the 3D plot utilizes slant range and ground range correction to obtain the surface height of the bottom of the pool. From the experiments conducted to conduct mapping in the pool, two-dimensional and three-dimensional visual forms of the pool floor and pool walls were produced. The results of the estimated measurement of the width of the pool obtained 14.05 meters and the height of the pool 3.199 meters with an SSS beam angle of 58 degrees. © 2023 IEEE.

关键词： Geometry

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High-yield and rapid isolation of extracellular vesicles by flocculation via orbital acoustic trapping:FLOAT

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Microsystems & Nanoengineering 2024年第1期10卷 313-323页

作者： Joseph Rufo Peiran Zhang Zeyu Wang Yuyang Gu Kaichun Yang Joseph Rich Chuyi Chen Ruoyu Zhong Ke Jin Ye He Jianping Xia Ke Li Jiarong Wu Yingshi Ouyang Yoel Sadovsky Luke P.Lee Tony Jun Huang Department of Mechanical Engineering and Materials Science Duke UniversityDurhamNCUSA Department of Biomedical Engineering Duke UniversityDurhamNCUSA Department of Obstetrics Gynecologyand Reproductive SciencesMagee-Womens Research InstituteUniversity of PittsburghPittsburghPAUSA Department of Microbiology and Molecular Genetics School of MedicineUniversity of PittsburghPittsburghPAUSA Renal Division and Division of Engineering in Medicine Department of MedicineBrigham and Women’s HospitalHarvard Medical SchoolBostonMAUSA Department of Bioengineering Department of Electrical Engineering and Computer ScienceUniversity of CaliforniaBerkeleyBerkeleyCAUSA Department of Biophysics Institute of Quantum BiophysicsSungkyunkwan UniversitySuwonKorea

Extracellular vesicles(EVs)have been identified as promising biomarkers for the noninvasive diagnosis of various ***,challenges in separating EVs from soluble proteins have resulted in variable EV recovery rates and low ***,we report a high-yield(>90%)and rapid(<10 min)EV isolation method called FLocculation via Orbital Acoustic Trapping(FLOAT).The FLOAT approach utilizes an acoustofluidic droplet centrifuge to rotate and controllably heat liquid *** adding a thermoresponsive polymer flocculant,nanoparticles as small as 20 nm can be rapidly and selectively concentrated at the center of the *** demonstrate the ability of FLOAT to separate urinary EVs from the highly abundant Tamm-Horsfall protein,addressing a significant obstacle in the development of EV-based liquid *** to its high-yield nature,FLOAT reduces biofluid starting volume requirements by a factor of 100(from 20 mL to 200µL),demonstrating its promising potential in point-of-care diagnostics.

关键词： trapping utilize separating

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A 3D-Printed Wideband Sensor for Food Complex Permittivity Estimation Based on Double Ridge Waveguide

A 3D-Printed Wideband Sensor for Food Complex Permittivity E...

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2023 Photonics and Electromagnetics Research Symposium, PIERS 2023

作者： Macciò, C. Lodi, M.B. Curreli, N. Melis, A. Mazzarella, G. Bozzi, M. Fanti, A. University of Cagliari Department of Electrical and Electronic Engineering Cagliari09123 Italy via Morego 30 Genoa16163 Italy University of Pavia Department of Electrical Computer and Biomedical Engineering Pavia27100 Italy

ISBN: (纸本)9798350312843

This work aims to advance the design of a microwave device capable of detecting, through indirect measurements, variations in the permittivity of the food materials. To this aim, a novel sensor based on double ridge waveguide configuration and a specific sample holder, to be 3D-printed, are designed. To numerically study the microwave signal propagation in the designed device and investigate its wideband performance, simulations with different food materials are performed. In particular, the complex dielectric permittivity of Carasau bread doughs, a traditional food product from Sardinia (Italy), and different distilled water-based solutions with various percentage of solutes in them, are measured with open-ended coaxial probe in the range 0.5-8.5 GHz and the acquired data are then used as material under test. The results show a good ability of the device to discriminate variations of the percentage of solute in solutions. Differences of up to 60MHz in the position of the |S11| peak and 15.8 dB in amplitude are in fact observed between adjacent curves. However, in the case of Carasau bread dough, this device was not capable of clearly discriminating variations in the percentage of ingredients used. © 2023 IEEE.

关键词： Permittivity

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Brain Network Reorganization in Response to Multi-level Mental Workload in Simulated Flight Tasks

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IEEE Transactions on Cognitive and Developmental Systems 2024年第3期17卷 698-709页

作者： Wu, Kuijun Yuan, Jingjia Ge, Xianliang Kakkos, Ioannis Qian, Linze Wang, Sujie Yu, Yamei Li, Chuantao Sun, Yu Zhejiang University Center for Psychological Sciences Hangzhou310027 China National Technical University of Athens Biomedical Engineering Laboratory School of Electrical and Computer Engineering Athens15790 Greece Zhejiang University School of Medicine Department of Neurology Sir Run Run Shaw Hospital Hangzhou310016 China Naval Military Medical University Naval Medical Center of PLA Department of Aviation Medicine Shanghai200433 China Zhejiang University Key Laboratory for Biomedical Engineering of Ministry of Education of China Department of Biomedical Engineering Hangzhou310027 China Zhejiang University School of Medicine Department of Rehabilitation Sir Run Run Shaw Hospital Hangzhou310027 China

In various real-world situations, inappropriate mental workload (MWL) can impair task performance and may cause operational safety risks. Growing efforts have been made to reveal the underlying neural mechanism of MWL. However, most studies have been limited to well-controlled cognitive tasks, overlooking the exploration of the underlying neural mechanisms in close-to-real human-machine interaction tasks. Here, we investigated the brain network reorganization in response to MWL in a close-to-real simulated flight task. Specifically, a dual-task (flight simulation + auditory CRT task) design flight simulation paradigm to mimic real-flight cognitive challenges was introduced to induce varying levels of MWL. The perceived subjective task difficulty and secondary task performance validated the effectiveness of our experimental design. Moreover, multi-level MWL classification was performed to delve into the changes of functional connectivity (FC) in response to different MWL and achieved satisfactory performance (3 levels, accuracy = 71.85%). Further inspection of the discriminative FCs highlighted the importance of frontal and parietal-occipital brain regions in MWL modulation. Additional graph theoretical analysis revealed increased information transfer efficiency across distributed brain regions with the increase of MWL. Overall, our research offers valuable insights into the neural mechanisms underlying MWL, with potential implications for improving safety in aviation contexts. © 2016 IEEE.

关键词： Flight simulators

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Metasurfaces for next-generation wireless communication systems

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National Science Review 2023年第8期10卷 17-19页

作者： Younes Ra'di Nikita Nefedkin Petar Popovski Andrea Alù Department of Electrical Engineering and Computer Science Syracuse University Photonics Initiative Advanced Science Research Center City University of New York Department of Electronic Systems Aalborg University Physics Program Graduate Center City University of New York

The pace of development in the world of 5G communication systems has proven to be much more demanding than previous generations, with 5G-Advanced seemingly around the corner [1]. Extensive research is already underway to structure the next generation of wireless systems(i.e. 6G), which may potentially enable an unprecedented level of human–machine interaction [2].

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Using Blockchain Technology in Mobile Network to create decentralized Home Location Registry(HLR)

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computer Systems Science & engineering 2021年第11期39卷 287-296页

作者： Behnam Kiani Kalejahi Ruslan Eminov Aga Guliyev Department of Computer Science School of Science and EngineeringKhazar UniversityBakuAzerbaijan Department of Biomedical Engineering Faculty of Electrical and Computer EngineeringUniversity of TabrizTabrizIran

Blockchain can mean many things to many *** is a set of protocols and encryption technologies for securely storing data on a distributed network for the *** is a distributed ledger for business and finance and the technology underlying the explosion of new digital *** technologists,it is the driving force behind the next generation of the *** the other hand,it is a transformational technology facilitating large-scale human progress in previously unimagined ways for the rest of the people,a tool for radically reshaping society and *** view it as a disruptive technology that can be the source of a great deal of fraud,illegal activity,where others see opportunities to bring into existing systems by providing decentralization,transparency,and *** complex technological,economic,and social phenomenon has been the subject of fervent *** calls into question what might have been seen to be established parameters of the modern world like currency,economics,trust,value,and *** is a revolutionary new computing paradigm and one of the most significant,fundamental digital platforms’advances since the *** is an emergent technology experiencing very rapid evolution,and so is our understanding of what it is and what it can *** paper is subject to the use of Blockchain concepts in mobile networks to strengthen the Home Location Registry(HLR)database and make it decentralized for secure transactions and in banking and financial *** also holds potential implications for global *** could make trade more efficient by removing the manual and paper-based processes and introducing streamlined and automated processes.

关键词： Blockchain Mobile Network Home Location Registry Mobile Technology

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Efficient Brain-computer Interface for Attention Detection in Health Care Industry

Efficient Brain-Computer Interface for Attention Detection i...

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2023 International Conference on Self Sustainable Artificial Intelligence Systems, ICSSAS 2023

作者： Sharmila, M. Manjula, M. Muthu Yogesh, B. Keerthana, S. Vijayakumar, P. Selvam, N. Velalar College of Engineering and Technology Department of Biomedical Engineering Erode India Nandha Engineering College Department of Electrical and Electronics Engineering Erode India Jkkn College of Engineering and Technology Department of Electrical and Electronics Engineering Komarapalayam India Kongu Engineering College Department of Master of Computer Applications Tamil Nadu Perundurai638060 India M.Kumarasamy College of Engineering Department of Electrical and Electronics Engineering Karur639113 India

ISBN: (纸本)9798350300857

A cognitive component of brain activity is attention. The effectiveness of other activities, including the learning process and crucial ones, are greatly impacted. Here, several methods are employed to categorize human attention according to ERP. The Electroencephalography (EEG) signal known as the Event-Related Potential (ERP) P300 is an evoked potential that has been linked to a number of cognitive functions, including response choice and attention. This study utilize the MOABB ERP Dataset bi2013a in this case. This was derived from a study conducted at GIPSA-lab in 2013 by the University of Grenoble Alpes, the CNRS, and Grenoble-INP. With the use of statistical Time domain analysis techniques like means and standard deviation of the filtered EEG data, the P300 ERP may be recovered from the raw EEG signal. Distinct P300 classifiers were utilized in this study, four of which were based on Riemannian geometry: CSP LDA, ERPCov TS LR, ERPCov MDM, as well as LR, LDA, and SVM classifiers. By analysing the data, it is concluded that LR performs better than the competition and generates positive test results on categorising the p300 ERP, which directly indicates the attention of the individual individuals. © 2023 IEEE.

关键词： Electroencephalography

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Measurements of slow tissue dynamics with microlens array-based laser speckle contrast imaging

Measurements of slow tissue dynamics with microlens array-ba...

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Optics and the Brain, BRAIN 2024 - Part of Optica Biophotonics Congress: biomedical Optics

作者： Liu, Bingxue Yaqoob, Zahid Boas, David A. Cheng, Xiaojun Department of Electrical and Computer Engineering Boston University MA02215 United States Neurophotonics Center Boston University MA02215 United States Department of Biomedical Engineering Boston University MA02215 United States

We present a microlens array-based laser speckle contrast imaging (mla-LSCI) system with multi-point illumination and wide field detection, which will give us a map of slow tissue dynamics across the mice cortex. ... 详细信息

ISBN: (纸本)9781957171340

关键词： Microlenses

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An Investigation of Triple-Tuned Traps for MRI Receiver Coil Design 46

An Investigation of Triple-Tuned Traps for MRI Receiver Coil...

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46th Annual International Conference of the IEEE engineering in Medicine and Biology Society, EMBC 2024

作者： Busher, Joseph Hou, Jue Wright, Steven M. McDougall, Mary P. Texas A&m University Department of Electrical and Computer Engineering College StationTX77843 United States Texas A&m University Department of Biomedical Engineering College StationTX77843 United States

ISBN: (纸本)9798350371499

Multinuclear MRI/S offers a powerful tool for noninvasive diagnostics and disease monitoring but remains largely underutilized in part due to the intrinsically low sensitivity of X-nuclei scans. This has led to continued research interest into the optimization of multi-nuclear coil designs for double-and triple-tuned coils that can facilitate scaling into higher channel count arrays to increase sensitivity. Here we present a new design for a parallel trap network that can create a simultaneous triple-tuned coil for 1H, 31P and 23Na at 4.7T. Coils were characterized both on the bench and in the scanner for the relative SNR of the different multi-tuning networks. The parallel network was shown to have a relative SNR gain of over 20% compared to a series network for 1H imaging. X-nuclei had a decrease in SNR of less than 10% for both 31P and 23Na. Future work involves further optimization of inductor design and placement to improve the X-nuclei sensitivity. © 2024 IEEE.

关键词： Tuning

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