Mobile Computing Lab.

Research Topics

List of research topics from Yamaguchi Laboratory.

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WIS2.0 Pub/Sub Reinforcement Learning Point Cloud Visual Language Model AIoT CLIP WiFi Smart Environments Drone LiDAR Victim Detection Mobility Data Reconstruction Spatial-Temporal Data Processing Transformer Models Graph Neural Networks (GNNs) Map-Matching Algorithms traffic management multi-agent simulation gradient descent policy optimization Backscatter Activity Recognition Wireless Sensing Ultra-low-power Wi-Fi CSI Fall Detection Privacy Preservation Hybrid Metaverse Video Quality Optimization Neural Networks Visitor Mobility Patterns Wakayama Castle Park Reconstruction of Mobility Trajectories Statistical Analysis Counterfactual Analysis Accessibility Constraints Environmental Conditions Decision-Making Processes Design of Mobility Services Autonomous Driving Environmental Condition Recognition CNN Surrogate Model Decision Tree Electric Scooter (E-Scooter) Micromobility Traffic Safety Edge Computing Real-Time Hazard Prediction Route Recommendation Safety Assistance Systems Generative Adversarial Networks Physics-Informed Models FMCW Radar Range-Doppler Synthetic Data Multi-target Occlusion Autonomous Navigation Multimodal Fusion FPGA Acceleration LLM (Large Language Model) Socially Compliant Path Planning Dynamic Environment Adaptation Quantum Computing Combinatorial Optimization QUBO QAOA Multi-Person Time-Window Constrained Traveling Salesman Problem TW-TSP Quantum Approximate Algorithm Unconstrained Quadratic Optimization Problem Graph Neural Network GCN Vehicle Routing Problem Driver Assistance Systems Multi-autonomous Vehicle Studies Models Techniques and Simulations Automated Vehicle Operation Motion Planning Navigation Optimization Integer Linear Programming Machine Learning Supervised Learning Smart City Bluetooth Channel Sounding BLE Wireless sensing Unattended Child Detection GPS OD estimation WiFi CSI Digital twin scaniverse LLM Monitoring Autoencoder Environment-Independent Core Body Temperature Estimation Feature Selection Thermography Face Recognition Face Segmentation Large Language Models Agent-Based Modeling Smart Home Simulation Digital Twin Cyber-Physical Systems Step counting Localization User identification Energy harvesting energy-free sensing Onboard Camera Video Mobility Data Vehicle Detection Deep Neural Network(DNN) Recovery Estimation Smart Toothbrush Environment-Agnostic In-home Human Activity Recognition Using Wi-Fi Signals Synthetic mobility OD traffic optimization Traffic simulation 3D point cloud object detection wearable device Thermal camera Smartphone Offset correction Wearable sensor Heart rate Reliability Wrist-worn device Running Machine learning Generative adversarial networks Data balancing Imbalanced Dataset Time-series data Transfer learning Thermal sensation Time-series processing Image processing Unmanned Aerial Vehicle Earthquake Assessments Wheelchair Basketball Sports Sensing Flood water level detection LTE-LAA cell-selection Face-touch Smartwatch distributed deep learning ultra-low power AI Cyber-physical Space User Identification Wi-Fi Sensing Wi-Fi In-Vehicle Network Network Simulation Network Calculus human identification small-size depth sensor(LiDAR) sitting posture point cloud deep learning Privacy-preserving Re-ID Multi-LiDAR Tracking HEMS branch circuit home activity recognition Target Identification Wi-Fi Imaging Deep Learning In-vehicle Camera Driver Assist System AR Person Re-ID Deep Metric Learning premature infants/thermal images/parts detection/temperature extraction/deep learning LIDAR Dpeth-camera Pedestrian Tracking Kalman-filter
Adaptive Message Scheduling Assisted by Natural Language Processing Models

Adaptive Message Scheduling Assisted by Natural Language Processing Models

This study proposes an adaptive message delivery mechanism for a broker in the WMO Information System 2.0 (WIS2.0), a next-generation world weather Io...

WIS2.0 Pub/Sub Reinforcement Learning
Indoor Object Recognition with WiFi RSSI-Integrated Visual-Language Models

Indoor Object Recognition with WiFi RSSI-Integrated Visual-Language Models

This study proposes a novel method for automatic object recognition and classification in indoor environments using visual-language models (VLMs). Tra...

Point Cloud Visual Language Model AIoT +3
Victim Detection Based on Shape Features from 3D Point Clouds

Victim Detection Based on Shape Features from 3D Point Clouds

Japan experiences frequent natural disasters, including large-scale earthquakes. As seen in the case of the Great Hanshin-Awaji Earthquake, delayed vi...

Drone LiDAR Victim Detection
Map-Aware Super-Resolution GPS Trajectory Reconstruction via Machine Learning

Map-Aware Super-Resolution GPS Trajectory Reconstruction via Machine Learning

This research aims to realize a novel system for reconstructing high-resolution GPS trajectory data from truncated or low-resolution inputs, addressin...

Mobility Data Reconstruction Spatial-Temporal Data Processing Transformer Models +2
Policy Optimization for Pedestrian Traffic Management by Surrogation of Simulation Models

Policy Optimization for Pedestrian Traffic Management by Surrogation of Simulation Models

Sports events, concerts, and live performances attract large crowds, and the congestion during the return home after such events increases the risk of...

traffic management multi-agent simulation gradient descent +1
Activity Recognition Using CSI Backscatter with Commodity Wi-Fi

Activity Recognition Using CSI Backscatter with Commodity Wi-Fi

Activity recognition using Wi-Fi CSI (Channel State Information) has become popular due to its low deployment cost, requiring only Wi-Fi devices for a...

Backscatter Activity Recognition Wireless Sensing +2
Point Cloud-based Fall Detection for Healthcare Applications

Point Cloud-based Fall Detection for Healthcare Applications

Falls pose a significant health risk for older adults, with the WHO reporting them as the second leading cause of accidental deaths worldwide. In Japa...

Fall Detection Privacy Preservation LiDAR
Distributed Optimization of Shared Object Quality in Hybrid Metaverse for Real-World Integration

Distributed Optimization of Shared Object Quality in Hybrid Metaverse for Real-World Integration

Since the outbreak of COVID-19, the metaverse has gained attention as a tool for remote interaction. With the advancement of recent 3D sensing technol...

Hybrid Metaverse Video Quality Optimization Neural Networks
Understanding Visitor Mobility Patterns in Public Spaces: A Case Study of Wakayama Castle Park

Understanding Visitor Mobility Patterns in Public Spaces: A Case Study of Wakayama Castle Park

Understanding visitor mobility in public spaces is essential for optimizing transportation services and improving accessibility. This study investigat...

Visitor Mobility Patterns Wakayama Castle Park Reconstruction of Mobility Trajectories +6
Interpretable Environmental Condition Recognition for Autonomous Driving Using Surrogate Decision Trees

Interpretable Environmental Condition Recognition for Autonomous Driving Using Surrogate Decision Trees

In autonomous driving, sensors play a critical role in perceiving the surrounding environment and ensuring safe driving. However, their performance ca...

Autonomous Driving Environmental Condition Recognition CNN +2
Traffic Safety Assistance System for Electric Scooters

Traffic Safety Assistance System for Electric Scooters

In recent years, electric scooters (E-Scooters) have rapidly gained popularity worldwide as a key mode of micromobility. Due to their convenience, low...

Electric Scooter (E-Scooter) Micromobility Traffic Safety Edge Computing +3
Physics-Informed Generative Adversarial Networks for Range-Doppler Map Generation under Inter-Vehicle Occlusion

Physics-Informed Generative Adversarial Networks for Range-Doppler Map Generation under Inter-Vehicle Occlusion

Deep Learning has recently expanded the potential of radar technology. Integrating neural networks with radar enables automatic feature extraction fro...

Generative Adversarial Networks Physics-Informed Models FMCW Radar +4
LLM-Driven Adaptive Autonomous Robot Navigation via Multimodal Fusion for Dynamic Environments

LLM-Driven Adaptive Autonomous Robot Navigation via Multimodal Fusion for Dynamic Environments

This research addresses the challenges of autonomous robot navigation in dynamic, high-density environments (e.g., train stations and shopping malls) ...

Autonomous Navigation Multimodal Fusion FPGA Acceleration +3
Quantum Approximation Method and Neural-Integrated Mathematical Optimization Algorithm for Elderly Care Taxi Dispatch Problem

Quantum Approximation Method and Neural-Integrated Mathematical Optimization Algorithm for Elderly Care Taxi Dispatch Problem

In Japan, the aging population is increasing, leading to a growing number of elderly individuals utilizing nursing care facilities such as day service...

Quantum Computing Combinatorial Optimization QUBO +8
Lightweight Merging Point Prediction on Highway On-Ramps Using Regression Techniques

Lightweight Merging Point Prediction on Highway On-Ramps Using Regression Techniques

This study introduces a lightweight machine learning framework for forecasting the merging points of vehicles on on-ramps. Our model, in contrast to p...

Driver Assistance Systems Multi-autonomous Vehicle Studies Models +4
Optimizing Nursing Care Taxi Dispatch Leveraging Integer Linear Programming Solvers and Machine Learning

Optimizing Nursing Care Taxi Dispatch Leveraging Integer Linear Programming Solvers and Machine Learning

The aging population is creating crucial demand for the transportation services at the facilities for older people. Vehicles should be assigned proper...

Vehicle Routing Problem Optimization Integer Linear Programming +3
Human Presence Detection Using Bluetooth Channel Sounding

Human Presence Detection Using Bluetooth Channel Sounding

Accidents involving children being left behind in vehicles have become a serious social issue both domestically and internationally. To prevent such i...

Bluetooth Channel Sounding BLE Wireless sensing +1
Synthesis of Pedestrian Movement Patterns: Combining Sparse Location Data with Multi-Spot Density Measurements

Synthesis of Pedestrian Movement Patterns: Combining Sparse Location Data with Multi-Spot Density Measurements

In recent years, the utilization of pedestrian flow data has been gaining attention in regional revitalization. Understanding current pedestrian flow ...

GPS OD estimation
Indoor Drone Propeller Speed Estimation Using Wi-Fi CSI

Indoor Drone Propeller Speed Estimation Using Wi-Fi CSI

With the evolution of drone technology, its range of applications has expanded to include logistics, surveillance, inspection, agriculture, and other ...

WiFi CSI Drone
Adaptive Indoor Navigation System Using Human Flow Digital Twin

Adaptive Indoor Navigation System Using Human Flow Digital Twin

Digital twin technology is attracting attention as a technology that reproduces objects and systems in physical space in virtual space and coordinates...

Digital twin LiDAR scaniverse
Collaborative LLM Agents for Daily Activity Summarization on Edge Devices

Collaborative LLM Agents for Daily Activity Summarization on Edge Devices

In recent years, with the increase in the number of elderly people living alone, the demand for monitoring systems has increased. There are two main r...

LLM Monitoring
Environment-Independent Activity Recognition via Wi-Fi CSI Using an Encoder-Decoder Network

Environment-Independent Activity Recognition via Wi-Fi CSI Using an Encoder-Decoder Network

Human Activity Recognition (HAR) using Wi-Fi Channel State Information (CSI) offers a device-free and cost-effective solution for applications in heal...

Wi-Fi CSI Autoencoder Activity Recognition +1
Investigation of Core Body Temperature Estimation Based on Facial Surface Temperature Using Thermography

Investigation of Core Body Temperature Estimation Based on Facial Surface Temperature Using Thermography

Heat stroke occurs due to an increase in core body temperature, making its monitoring crucial for prevention. Core body temperature is typically measu...

Core Body Temperature Estimation Feature Selection Thermography +3
LLM as Personable Decision-Making Model for Smart Home Simulation

LLM as Personable Decision-Making Model for Smart Home Simulation

This research proposes a method for simulating residents' decision-making and daily activities in a smart home environment using a Large Language Mode...

Large Language Models Agent-Based Modeling Smart Home Simulation +2
Environment-Independent Wi-Fi CSI Activity Recognition Method Based on an Extended Autoencoder

Environment-Independent Wi-Fi CSI Activity Recognition Method Based on an Extended Autoencoder

In recent years, research on human behavior recognition using Wi-Fi has been active, with the following advantages: Wi-Fi has less privacy concerns th...

Wi-Fi CSI Autoencoder Activity Recognition +1
Energy-Free Sensing and Context Recognition through Photovoltaic Cells

Energy-Free Sensing and Context Recognition through Photovoltaic Cells

Recently, IoT devices that do not require an external power source, especially energy-free sensing and indoor context recognition, have been attractin...

Step counting Localization User identification +2
A Vehicle Tracking Method Based on Distance Estimation Using Dashboard Camera

A Vehicle Tracking Method Based on Distance Estimation Using Dashboard Camera

In recent years, mobility data representing the flow of cars and people in an urban environment is expected to be used for many purposes, such as inve...

Onboard Camera Video Mobility Data Vehicle Detection +1
Mobile Health System using Facial Image for Assessment of Work Engagement, Recovery and Reattachment

Mobile Health System using Facial Image for Assessment of Work Engagement, Recovery and Reattachment

The number of workers' compensation claims and recognized cases related to mental disorders has been increasing annually. In response, the Ministry of...

Recovery Estimation Smart Toothbrush
Environment-Agnostic In-home Human Activity Recognition Using Wi-Fi Signals

Environment-Agnostic In-home Human Activity Recognition Using Wi-Fi Signals

 Recently, Wi-Fi CSI (channel state information) has been widely studied for low-cost activity recognition with low privacy concern. CSI represen...

Environment-Agnostic In-home Human Activity Recognition Using Wi-Fi Signals
A Method for Synthesizing Vehicle Mobility in Urban Areas Using Traffic Surveillance Cameras

A Method for Synthesizing Vehicle Mobility in Urban Areas Using Traffic Surveillance Cameras

We present a case study on synthesizing realistic vehicle mobility using link traffic information extracted from surveillance videos. Our trial has be...

Synthetic mobility OD traffic optimization Traffic simulation
Light-weight Object Detection of 3-D Point Cloud Data by Micro-size LiDAR

Light-weight Object Detection of 3-D Point Cloud Data by Micro-size LiDAR

3-D recognition technology has been attracting attention and developing rapidly in the fields of obstacle detection in automated driving and robotics....

3D point cloud object detection LiDAR +1
Dynamic Offset Correction for Smartphone Thermal Cameras Using a Wristband Sensor

Dynamic Offset Correction for Smartphone Thermal Cameras Using a Wristband Sensor

Thermal images are widely used to various healthcare applications. However, thermal images captured by smartphone thermal cameras have insufficient ac...

Thermal camera Smartphone Offset correction +1
Reliability Estimation of Heart Rate Measurement Using Wrist-Worn Devices

Reliability Estimation of Heart Rate Measurement Using Wrist-Worn Devices

Heart Rate (HR) measurement using wrist-worn devices suffers from noises owing to body movement. Even though many researchers have proposed sophistica...

Heart rate Reliability Wrist-worn device +1
Data Balancing for Thermal Comfort Datasets Using GANs

Data Balancing for Thermal Comfort Datasets Using GANs

Data balancing is an essential preprocessing for proper training of thermal comfort estimators. The development of various machine learning methods he...

Machine learning Generative adversarial networks Data balancing
Time-Series Physiological Data Balancing for Regression

Time-Series Physiological Data Balancing for Regression

Many studies have shown the effectiveness of ma- chine learning in estimating psychological or physiological states using physiological data as input....

Machine learning Imbalanced Dataset Data balancing +1
Estimation of Thermal Sensation Based on Machine Learning via Physiological Sensing

Estimation of Thermal Sensation Based on Machine Learning via Physiological Sensing

Comfortable air-conditioned environment enhances labor productivity and learning efficiency. In office buildings, schools, and other indoor environmen...

Machine learning Transfer learning Thermal camera +4
Anomaly Detection of Building Structure from Incomplete Point Cloud Obtained by UAV

Anomaly Detection of Building Structure from Incomplete Point Cloud Obtained by UAV

Japan has suffered tremendous damage from earthquakes and other natural disasters, including the 1995 Great Hanshin-Awaji Earthquake and the 2016 Kuma...

Point Cloud Unmanned Aerial Vehicle Earthquake Assessments
Localization Focusing on Human Poses Using a Single Camera Towards Social Distance Monitoring During Sports

Localization Focusing on Human Poses Using a Single Camera Towards Social Distance Monitoring During Sports

In recent years, data analysis in sports has become increasingly popular, and recognizing in-game actions plays a crucial role in tactical planning. F...

Wheelchair Basketball Activity Recognition Sports Sensing
Drone-based water level detection in flood disasters

Drone-based water level detection in flood disasters

Japan was hit by typhoon Hagibis, which came with torrential rains submerging almost eight-thousand buildings. For fast alleviation of and recovery fr...

Drone Flood water level detection
Operator Data Driven Cell-Selection in LTE-LAA Coexistence Networks

Operator Data Driven Cell-Selection in LTE-LAA Coexistence Networks

Efficient cell-selection is essential to realize the gains in network performance promised by LTE Licensed Assisted Access (LAA) in the 5GHz unlicense...

LTE-LAA cell-selection
Smartwatch-based Face-touch Prediction Using Deep Representational Learning

Smartwatch-based Face-touch Prediction Using Deep Representational Learning

World Health Organization (WHO) reported that viruses, including COVID-19, can be transmitted by touching the face with contaminated hands and advised...

Face-touch Activity Recognition Smartwatch
MicroDeep: In-network Deep Learning by Micro-sensor Coordination

MicroDeep: In-network Deep Learning by Micro-sensor Coordination

Distributed Execution of Deep Learning in Wireless Sensor NetworksIn wireless sensor networks, microcontrollers associated with sensors are becoming m...

distributed deep learning ultra-low power AI
Smartphone User Identification in Cyber-phsyical Space

Smartphone User Identification in Cyber-phsyical Space

By utilizing a cyber-physical space composed of constantly scanned objects and people in a three-dimensional physical space using 3D LiDAR and depth c...

Cyber-physical Space User Identification LiDAR
Backscatter Tag Detection Method Using Sinusoidal Frames towards Wi-Fi Sensing

Backscatter Tag Detection Method Using Sinusoidal Frames towards Wi-Fi Sensing

There are various methods for recognizing human activities and the status of objects, including camera-based approaches and wearable devices. However,...

Wi-Fi Sensing Backscatter
Performance Evaluation of Angle of Arrival Estimation by MUSIC Method Using Backscatter Tags

Performance Evaluation of Angle of Arrival Estimation by MUSIC Method Using Backscatter Tags

Indoor positioning of people and objects has potential applications in various fields, such as shopping malls, nursing homes, and offices. Possible us...

Backscatter Wi-Fi
An Efficient Method for Evaluating Delay Performance Using Worst-Case Estimates Based on Network Calculus

An Efficient Method for Evaluating Delay Performance Using Worst-Case Estimates Based on Network Calculus

In recent years, modern vehicles have been equipped with a growing number of sensors beyond traditional in-car systems such as navigation systems, ETC...

In-Vehicle Network Network Simulation Network Calculus
Person Identification Method Based on 3D Point Cloud Using Small Depth Sensor

Person Identification Method Based on 3D Point Cloud Using Small Depth Sensor

In recent years, there has been an increasing demand for systems that improve safety to limit the rapid spread of COVID-19.In particular, it is import...

human identification 3D point cloud small-size depth sensor(LiDAR)
3D Point Cloud-Based Sitting Posture Recognition Using Deep Learning

3D Point Cloud-Based Sitting Posture Recognition Using Deep Learning

The average sitting time for Japanese people is about 7 hours a day, which is the longest among the 20 most developed and middle-income countries. I...

sitting posture object detection point cloud +1
Privacy-preserving Pedestrian Tracking using Distributed 3D LiDARs

Privacy-preserving Pedestrian Tracking using Distributed 3D LiDARs

The growing demand for intelligent environments unleashes an extraordinary cycle of privacy-aware applications that makes individuals' life more comfo...

Privacy-preserving LiDAR Re-ID +1
Home Activity Recognition Using Low-Grain Branch Circuit Power Consumption

Home Activity Recognition Using Low-Grain Branch Circuit Power Consumption

In recent years, HEMS (Home Energy Management System), which monitors the amount of electricity and gas used in the home and "automatically controls" ...

HEMS branch circuit home activity recognition
Identification of Conductive Tags Based on Radio Reflection Patterns Using LSTM

Identification of Conductive Tags Based on Radio Reflection Patterns Using LSTM

Identifying humans and things (i.e., target identification) is essential for various applications such as inventory management, working time managemen...

Target Identification Wi-Fi Imaging Wireless Sensing +1
Multi-Lane Detection and Tracking Using Vision for Traffic Situation Awareness

Multi-Lane Detection and Tracking Using Vision for Traffic Situation Awareness

In recent years, the number of vehicles equipped with in-vehicle cameras has been increasing. However, most of the images from in-vehicle cameras of o...

In-vehicle Camera Driver Assist System
Video-based Human Tracking Robust to Dynamic Camera Position and Orientation Changes

Video-based Human Tracking Robust to Dynamic Camera Position and Orientation Changes

In recent years, RGB cameras and depth cameras integrated into Augmented Reality (AR) glasses and smart glasses have been utilized for recognizing peo...

AR Person Re-ID Deep Metric Learning
Body Part Detection from Neonatal Thermal Images Using Deep Learning

Body Part Detection from Neonatal Thermal Images Using Deep Learning

Because premature infants have an immature thermoregulatory function, proper temperature control with an incubator is essential. Currently, the probe ...

premature infants/thermal images/parts detection/temperature extraction/deep learning
Robust Pedestrian Tracking Against Occlusions in Public Spaces Using 3D Point Clouds from Depth/LiDAR Sensors

Robust Pedestrian Tracking Against Occlusions in Public Spaces Using 3D Point Clouds from Depth/LiDAR Sensors

We propose an approach to pedestrian tracking in a public passageway with pedestrians, such as those carrying luggage and baby strollers, and family g...

LIDAR Dpeth-camera Pedestrian Tracking +1