Publications de Hooman Dejnabadi

Seek and learn: Automated identification of microevents in animal behaviour using envelopes of acceleration data and machine learning

Kamiar Aminian, Hooman Dejnabadi, Pritish Chakravarty

Animal‐borne accelerometers have been used across more than 120 species to infer biologically significant information such as energy expenditure and broad behavioural categories. While the accelerometer’s high sensitivity to movement and fast response time ...

2020

Real-World Gait Bout Detection Using a Wrist Sensor: An Unsupervised Real-Life Validation

Kamiar Aminian, Anisoara Ionescu, Hooman Dejnabadi, Abolfazl Soltani

Gait bouts (GB), as a prominent indication of physical activity, contain valuable fundamental information closely associated with human & x2019;s health status. Therefore, objective assessment of the GB (e.g. detection, spatio-temporal analysis) during dai ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2020

A Vibrational Technique for in vitro Intraoperative Prosthesis Fixation Monitoring

Kamiar Aminian, Hooman Dejnabadi, Seyed Abdolmajid Yousefsani

Objective: In this paper, a new vibrational modal analysis technique was developed for intraoperative cementless prosthesis fixation evaluation upon hammering. Methods: An artificial bone (Sawbones)-prosthesis system was excited by sweeping of a sine signa ...

2020

Real-world gait speed estimation using wrist sensor: A personalized approach

Kamiar Aminian, Hooman Dejnabadi, Martin Savary, Abolfazl Soltani

Gait speed is an important parameter to characterize people's daily mobility. For real-world speed measurement, inertial sensors or Global Navigation Satellite System (GNSS) can be used on wrist, possibly integrated in a wristwatch. However, power consumpt ...

2019

A randomised controlled clinical trial and gait analysis of fixed- and mobile-bearing total knee replacements with a five-year follow-up

Kamiar Aminian, Hooman Dejnabadi, Brigitte Jolles-Haeberli

This study compared the outcome of total knee replacement (TKR) in adult patients with fixed- and mobile-bearing prostheses during the first post-operative year and at five years' follow-up, using gait parameters as a new objective measure. This double-bli ...

2012

An Implantable System for Angle Measurement in Prosthetic Knee

Kamiar Aminian, Hooman Dejnabadi, Arash Arami

In this work we designed and tested an in-vivo measurement system of prosthetic knee joint angles. The system included a small permanent magnet in the femoral part and three magneto resistance sensors placed in the polyethylene part. The sensor configurati ...

2011

Instrumented Prosthesis for Knee Implants Monitoring

Steve Tanner, Kamiar Aminian, Philippe Renaud, Catherine Dehollain, Arnaud Bertsch, Peter Ryser, Eric Meurville, Hooman Dejnabadi, Pierre-André Farine, Oguz Atasoy, Brigitte Jolles-Haeberli, Arash Arami, Willyan Hasenkamp Carreira, Shafqat Ali, Matteo Simoncini

In this work we present an instrumented smart knee prosthesis for in-vivo measurement of forces and kinematics. Studying the constraints, we designed minimal sensory systems to be placed in the polyethylene part of the prosthesis. The magnetic sensors and ...

IEEE2011

Objective analysis of gait coordination for total knee arthroplasty outcome

Kamiar Aminian, Hooman Dejnabadi

2009

A New Approach for Quantitative Analysis of Inter-Joint Coordination during Gait

Kamiar Aminian, Hooman Dejnabadi

2008

Gait analysis and WOMAC are complementary in assessing functional outcome in total hip replacement

Kamiar Aminian, Hooman Dejnabadi

Objective: To investigate the correlation between objective and subjective evaluation of patients with total hip replacement. Design: Prospective preliminary trial comparing the Western Ontario and McMaster University questionnaire ( WOMAC) and gait analys ...

2006

Estimation and visualization of sagittal kinematics of lower limbs orientation using body-fixed sensors

Kamiar Aminian, Emilio Casanova, Pascal Fua, Hooman Dejnabadi

A new method of estimating lower limbs orientations using a combination of accelerometers and gyroscopes is presented. The model is based on estimating the accelerations of ankle and knee joints by placing virtual sensors at the centers of rotation. The pr ...

Institute of Electrical and Electronics Engineers2006

Analysis of gait and coordination for arthroplasty outcome evaluation using body-fixed sensors

Hooman Dejnabadi

The importance of evaluation of an orthopedic operation such as hip or knee arthroplasty has long been recognized. Many definitions of outcome and scoring questionnaires have been used in the past to assess the outcome of joint replacement. However, these ...

EPFL2006

A new approach to accurate measurement of uniaxial joint angles based on a combination of accelerometers and gyroscopes

Kamiar Aminian, Hooman Dejnabadi

A new method of measuring joint angle using a combination of accelerometers and gyroscopes is presented. The method proposes a minimal sensor configuration with one sensor module mounted on each segment. The model is based on estimating the acceleration of ...

2005