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Training a modern machine learning architecture on a new task requires extensive learning-rate tuning, which comes at a high computational cost. Here we develop new Polyak-type adaptive learning rates that can be used on top of any momentum…

Machine Learning · Computer Science 2024-06-06 Fabian Schaipp , Ruben Ohana , Michael Eickenberg , Aaron Defazio , Robert M. Gower

Human Action Recognition (HAR), one of the most important tasks in computer vision, has developed rapidly in the past decade and has a wide range of applications in health monitoring, intelligent surveillance, virtual reality, human…

Computer Vision and Pattern Recognition · Computer Science 2023-01-18 Zhou Shuchang

Machine learning-based wearable human activity recognition (WHAR) models enable the development of various smart and connected community applications such as sleep pattern monitoring, medication reminders, cognitive health assessment,…

Signal Processing · Electrical Eng. & Systems 2023-04-14 Avijoy Chakma , Abu Zaher Md Faridee , Indrajeet Ghosh , Nirmalya Roy

This paper introduces a lightweight gesture recognition system based on 60 GHz frequency modulated continuous wave (FMCW) radar. We show that gestures can be characterized efficiently by a set of five features, and propose a slim radar…

Machine Learning · Computer Science 2024-02-29 Maximilian Strobel , Stephan Schoenfeldt , Jonas Daugalas

Human activity detection from digital videos presents many challenges to the computer vision and image processing communities. Recently, many methods have been developed to detect human activities with varying degree of success. Yet, the…

Computer Vision and Pattern Recognition · Computer Science 2022-03-15 Wenjing Shi

Mobile and wearable devices have enabled numerous applications, including activity tracking, wellness monitoring, and human--computer interaction, that measure and improve our daily lives. Many of these applications are made possible by…

Human-Computer Interaction · Computer Science 2022-03-04 Shibo Zhang , Yaxuan Li , Shen Zhang , Farzad Shahabi , Stephen Xia , Yu Deng , Nabil Alshurafa

Falls have become more frequent in recent years, which has been harmful for senior citizens.Therefore detecting falls have become important and several data sets and machine learning model have been introduced related to fall detection. In…

Computer Vision and Pattern Recognition · Computer Science 2023-02-02 Xi Wang , Ramya Penta , Bhavya Sehgal , Dale Chen-Song

Human Activity Recognition (HAR) is one of the fundamental building blocks of human assistive devices like orthoses and exoskeletons. There are different approaches to HAR depending on the application. Numerous studies have been focused on…

Human-Computer Interaction · Computer Science 2024-03-08 Farhad Nazari , Darius Nahavandi , Navid Mohajer , Abbas Khosravi

This paper focuses on the covariance-based activity detection problem in a multi-cell massive multiple-input multiple-output (MIMO) system. In this system, active devices transmit their signature sequences to multiple base stations (BSs),…

Information Theory · Computer Science 2024-10-22 Ziyue Wang , Ya-Feng Liu , Zhaorui Wang , Wei Yu

Despite the widespread installation of accelerometers in almost all mobile phones and wearable devices, activity recognition using accelerometers is still immature due to the poor recognition accuracy of existing recognition methods and the…

Machine Learning · Computer Science 2016-10-26 Mohammad Abu Alsheikh , Ahmed Selim , Dusit Niyato , Linda Doyle , Shaowei Lin , Hwee-Pink Tan

Designing a technique for the automatic analysis of different actions in videos in order to detect the presence of interested activities is of high significance nowadays. In this paper, we explore a robust and dynamic appearance technique…

Computer Vision and Pattern Recognition · Computer Science 2019-02-21 Abdul Basit

Wearable sensors such as Inertial Measurement Units (IMUs) are often used to assess the performance of human exercise. Common approaches use handcrafted features based on domain expertise or automatically extracted features using time…

Computer Vision and Pattern Recognition · Computer Science 2023-07-11 Ashish Singh , Antonio Bevilacqua , Timilehin B. Aderinola , Thach Le Nguyen , Darragh Whelan , Martin O'Reilly , Brian Caulfield , Georgiana Ifrim

Smartphone sensors can be extremely useful in providing information on the activities and behaviors of persons. Human activity recognition is increasingly used for games, medical, or surveillance. In this paper, we propose a…

Machine Learning · Computer Science 2026-02-03 David Craveiro , Hugo Silva

Recent research has demonstrated the complementary nature of camera-based and inertial data for modeling human gestures, activities, and sentiment. Yet, despite its growing importance for environmental sensing as well as the advance of…

Databases · Computer Science 2025-11-11 Si Zuo , Yuqing Song , Sahar Golipoor , Ying Liu , Xujun Ma , Stephan Sigg

Ultra-massive multiple-input multiple-output MIMO (UM-MIMO) leverages large antenna arrays at high frequencies, transitioning communication paradigm into the radiative near-field (NF), where spherical wavefronts enable full-vector…

Signal Processing · Electrical Eng. & Systems 2025-07-21 Ahmed Hussain , Asmaa Abdallah , Abdulkadir Celik , Ahmed M. Eltawil

Effective tracking of surrounding traffic participants allows for an accurate state estimation as a necessary ingredient for prediction of future behavior and therefore adequate planning of the ego vehicle trajectory. One approach for…

Robotics · Computer Science 2024-06-04 Patrick Palmer , Martin Krüger , Richard Altendorfer , Torsten Bertram

Millimeter wave (mmWave) based gesture recognition technology provides a good human computer interaction (HCI) experience. Prior works focus on the close-range gesture recognition, but fall short in range extension, i.e., they are unable to…

Human-Computer Interaction · Computer Science 2020-02-10 Yu Liu , Yuheng Wang , Haipeng Liu , Anfu Zhou , Jianhua Liu , Ning Yang

A novel, real-time, mm-Wave radar-based static hand shape classification algorithm and implementation are proposed. The method finds several applications in low cost and privacy sensitive touchless control technology using 60 Ghz radar as…

Computer Vision and Pattern Recognition · Computer Science 2022-10-25 Athmanarayanan Lakshmi Narayanan , Asma Beevi K. T , Haoyang Wu , Jingyi Ma , W. Margaret Huang

Ankle exoskeletons have garnered considerable interest for their potential to enhance mobility and reduce fall risks, particularly among the aging population. The efficacy of these devices relies on accurate real-time prediction of the…

Systems and Control · Electrical Eng. & Systems 2024-11-26 Silas Ruhrberg Estévez , Josée Mallah , Dominika Kazieczko , Chenyu Tang , Luigi G. Occhipinti

Human activity recognition (HAR) is an essential research field that has been used in different applications including home and workplace automation, security and surveillance as well as healthcare. Starting from conventional machine…

Signal Processing · Electrical Eng. & Systems 2023-09-15 Rebeen Ali Hamad , Wai Lok Woo , Bo Wei , Longzhi Yang