Tomoki Murakami
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View article: The effect of weight-bearing status on kinematics and cruciate ligament force in normal knees
The effect of weight-bearing status on kinematics and cruciate ligament force in normal knees Open
Evaluating WB status during normal knee flexion activities is important for optimizing surgical procedures and postoperative rehabilitation. This study aimed to clarify the effects of weight-bearing (WB) on in vivo knee kinematics and cruc…
View article: Functional alignment maintains constant medial stability and a more distinct medial pivot pattern throughout flexion compared to mechanical alignment in medial pivot total knee arthroplasty
Functional alignment maintains constant medial stability and a more distinct medial pivot pattern throughout flexion compared to mechanical alignment in medial pivot total knee arthroplasty Open
Purpose To investigate whether functional alignment (FA) leads to differences in in vivo kinematics and early clinical outcomes compared to mechanical alignment (MA) in patients undergoing total knee arthroplasty (TKA) using a medial pivot…
View article: Unsupervised Learning based Element Resource Allocation for Reconfigurable Intelligent Surfaces in mmWave Network
Unsupervised Learning based Element Resource Allocation for Reconfigurable Intelligent Surfaces in mmWave Network Open
The increasing demand for high data rates and seamless connectivity in wireless systems has sparked significant interest in reconfigurable intelligent surfaces (RIS) and artificial intelligence-based wireless applications. RIS typically co…
View article: State of Charge Estimation for Lithium-Ion Battery Based on Fractional-Order Kreisselmeier-Type Adaptive Observer
State of Charge Estimation for Lithium-Ion Battery Based on Fractional-Order Kreisselmeier-Type Adaptive Observer Open
For the safe and efficient use of lithium-ion batteries, the state of charge (SOC) is a particularly important state variable. In this paper, we propose a method for the online estimation of SOC and model parameters based on a fractional-o…
View article: Device-Free Indoor WLAN Localization With Distributed Antenna Placement Optimization and Spatially Localized Regression
Device-Free Indoor WLAN Localization With Distributed Antenna Placement Optimization and Spatially Localized Regression Open
Wireless sensing is a promising technology for future wireless communication networks to realize various application services. Wireless local area network (WLAN)-based localization approaches using channel state information (CSI) have been…
View article: Device-free Indoor WLAN Localization with Distributed Antenna Placement Optimization and Spatially Localized Regression
Device-free Indoor WLAN Localization with Distributed Antenna Placement Optimization and Spatially Localized Regression Open
Wireless sensing is a promising technology for future wireless communication networks to realize various application services. Wireless local area network (WLAN)-based localization approaches using channel state information (CSI) have been…
View article: Multipurpose Silicon-chip Flow Cell for Liquid Transmission Electron Microscopy and Related Analysis
Multipurpose Silicon-chip Flow Cell for Liquid Transmission Electron Microscopy and Related Analysis Open
We describe the development and applications of a flow cell chip for liquid transmission electron microscopy (TEM) for imaging nanoparticles, biological samples, and dynamic phenomena such as the freezing and melting of liquids, and Raman …
View article: Automated construction of Wi-Fi-based indoor logical location predictor using crowd-sourced photos with Wi-Fi signals
Automated construction of Wi-Fi-based indoor logical location predictor using crowd-sourced photos with Wi-Fi signals Open
Owing to the recent proliferation of smartphones and the SNS, a large number of images taken by smartphones at various places have been uploaded to SNSs. In addition, smartphones are equipped with various sensors such as Wi-Fi modules that…
View article: Device-Free WLAN Based Indoor Localization Scheme With Spatially Concatenated CSI and Distributed Antennas
Device-Free WLAN Based Indoor Localization Scheme With Spatially Concatenated CSI and Distributed Antennas Open
Various machine learning (ML) based localization schemes using channel state information (CSI) in wireless local area networks (WLANs) have been investigated recently. Adopting a proper feature selection technique is important to achieve f…
View article: Resource Allocation for Reconfigurable Intelligent Surface Assisted Dual Connectivity
Resource Allocation for Reconfigurable Intelligent Surface Assisted Dual Connectivity Open
The next generation 6G wireless systems are envisioned to have higher reliability and capacity than the existing cellular systems. The reconfigurable intelligent surfaces (RISs)-assisted wireless networks are one of the promising solutions…
View article: Feasibility Study of Practical AoA Estimation Using Compressed CSI on Commercial WLAN Devices
Feasibility Study of Practical AoA Estimation Using Compressed CSI on Commercial WLAN Devices Open
Wireless local area network (WLAN)-based localization is key for advanced indoor Internet-of-Things and embedded sensor applications. To further improve the accuracy of indoor localization, attention has been focused on WLAN-based indoor l…
View article: CBR-ACE: Counting Human Exercise using Wi-Fi Beamforming Reports
CBR-ACE: Counting Human Exercise using Wi-Fi Beamforming Reports Open
As people spend more time indoors owing to the COVID-19 global pandemic, the automatic detection of indoor human activity has increasingly become of interest to researchers and consumers. Conventional Wi-Fi Channel State Information (CSI)-…
View article: Performance Evaluation of Uplink Multiuser MIMO-OFDM System With Single RF Chain Receiver
Performance Evaluation of Uplink Multiuser MIMO-OFDM System With Single RF Chain Receiver Open
In response to the recent increase in wireless-traffic demand in various wireless communication networks, the number of spatial multiplexings, represented by multiple input multiple output (MIMO) systems, has been increasing. Assuming a re…
View article: Resource Allocation For Reconfigurable Intelligent Surface Assisted Dual Connectivity
Resource Allocation For Reconfigurable Intelligent Surface Assisted Dual Connectivity Open
The next generation 6G wireless systems are envisioned to have higher reliability and capacity than the existing cellular systems. The reconfigurable intelligent surfaces (RISs) is one of the promising solution to control the wireless chan…
View article: Resource Allocation For Reconfigurable Intelligent Surface Assisted Dual Connectivity
Resource Allocation For Reconfigurable Intelligent Surface Assisted Dual Connectivity Open
The next generation 6G wireless systems are envisioned to have higher reliability and capacity than the existing cellular systems. The reconfigurable intelligent surfaces (RISs) is one of the promising solution to control the wireless chan…
View article: Controlled formation of topological defects of liquid crystals in micro-wells
Controlled formation of topological defects of liquid crystals in micro-wells Open
Topological defects in liquid crystals (LCs) have drawn attention because they frequently control their collective structure and motion. We have developed a robust and straightforward methodology to prepare well-organised isolated topologi…
View article: mmWave massive analog relay MIMO
mmWave massive analog relay MIMO Open
Millimeter-Wave (mmWave) communications are a key technology to realize ultra-high data rate and ultra-low latency wireless communications. Compared with conventional communication systems in the microwave band such as 4G/LTE, mmWave commu…
View article: Massive distributed IRS aided wireless communication with ON/OFF selection
Massive distributed IRS aided wireless communication with ON/OFF selection Open
The mobile communication system beyond fifth-generation (beyond 5G) is required to maintain higher transmission capacity and reliability than existing 5G systems. To meet these requirements, one promising solution is to incorporate an Inte…
View article: IEEE 802.11ac-based Outdoor Device-free Human Localization
IEEE 802.11ac-based Outdoor Device-free Human Localization Open
wireless local area network (WLAN), device-free sensing, channel state information (CSI) Wireless local area network (WLAN) technologies are utilized for sensing, which rely on changes in wireless signals in a sensing environment.A number …
View article: CSI2Image: Image Reconstruction From Channel State Information Using Generative Adversarial Networks
CSI2Image: Image Reconstruction From Channel State Information Using Generative Adversarial Networks Open
This study aims to determine the upper limit of the wireless sensing capability of acquiring physical space information. This is a challenging objective because, at present, wireless sensing studies continue to succeed in acquiring novel p…
View article: An interleaved channel state information clustering scheme for wireless LAN-based object detection systems
An interleaved channel state information clustering scheme for wireless LAN-based object detection systems Open
In this article, we propose a frequency-domain feature clustering scheme for a machine-learning based object detection utilizing channel state information (CSI) in wireless local area network (WLAN) systems with multiple antennas where CSI…
View article: CSI2Image: Image Reconstruction from Channel State Information Using Generative Adversarial Networks
CSI2Image: Image Reconstruction from Channel State Information Using Generative Adversarial Networks Open
This study aims to find the upper limit of the wireless sensing capability of acquiring physical space information. This is a challenging objective, because at present, wireless sensing studies continue to succeed in acquiring novel phenom…
View article: An Actual Stadium Verification of WLAN Using a Distributed Smart Antenna System (D-SAS)
An Actual Stadium Verification of WLAN Using a Distributed Smart Antenna System (D-SAS) Open
Dense deployments of wireless local area network (WLAN) access points (APs) are accelerating to accommodate the massive wireless traffic from various mobile devices. The AP densification improves the received power at mobile devices; howev…
View article: A proposal on virtual massive array using fast beam switching and blind algorithm
A proposal on virtual massive array using fast beam switching and blind algorithm Open
In future wireless communication systems, massive multiple-input multiple-output (MIMO) is attracting attention for improving transmission rate. However, there is an issue that a large scale of hardware is needed due to massive numbers of …
View article: Separation and evaluation of shrimp blood cells using the DLD method
Separation and evaluation of shrimp blood cells using the DLD method Open
In recent years, food shortages have become a concern due to population growth, and kuruma shrimp is actively cultivated as an animal protein source. However, shrimps are often damaged by infectious diseases. In order to overcome this prob…