Janusz Kulon

Janusz Kulon
University of South Wales · Faculty of Computing, Engineering and Science

PhD

About

45
Publications
2,846
Reads
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467
Citations
Introduction
I am an Associate Professor at the School of Computing and Mathematical Sciences, Faculty of Computing, Engineering and Science, University of South Wales, UK. My research interests include digital signal processing, biomedical computing and knowledge based and expert systems.
Additional affiliations
September 2004 - January 2021
University of South Wales
Position
  • Professor (Associate)
July 2003 - August 2004
Brunel University London
Position
  • Research Associate
September 1995 - October 1999
Cracow University of Technology
Position
  • Lecturer
Education
October 1999 - June 2003
Brunel University London
Field of study
  • Medical electronics
September 1990 - September 1995
Cracow University of Technology
Field of study
  • Electrical and Computer Engineering

Publications

Publications (45)
Article
Background and objective The paper presents a novel technique for the visualisation and measurement of anthropometric features from patients with severe musculoskeletal conditions. During a routine postural assessment, healthcare professionals use anthropometric measurements to infer internal musculoskeletal configuration and inform the prescriptio...
Article
This paper develops a method for mitigating the negative effects of obstacles in narrowband, time division multiple access (TDMA), ultrasonic localization systems. The method builds upon the robust Bayesian classifier for ultrasonic localization (RoBCUL) algorithm which utilizes an iteratively reweighted least squares (IRLS) scheme. This algorithm...
Article
Full-text available
In this study, for the purpose of the optimization of the measurement system performance, a three-dimensional numerical model of the particle charge and size analyzer (PCSA) is presented. The PCSA is capable of simultaneous particle size and charge measurement using phase Doppler anemometry. Numerical simulations of particle transport under the inf...
Article
Full-text available
Purpose To measure the charge to mass (Q/M) ratios of the impactor stage masses (ISM) from commercial Flixotide™ 250 μg Evohaler, containing fluticasone propionate (FP), Serevent™ 25 μg Evohaler, containing salmeterol xinafoate (SX), and a combination Seretide™ 250/25 μg (FP/SX) Evohaler metered dose inhalers (MDIs). Measurements were performed wit...
Article
This paper develops a novel algorithm for classifying and rejecting non-line-of-sight ultrasonic signals for use in indoor positioning and measurement systems. The algorithm consists of two parts, an initial probability estimate based upon signal amplitude followed by an iteratively reweighed least squares regression that utilizes the probabilities...
Article
OsteoArthritis is a debilitating disease throughout the developed world, causing significant loss of quality of life to individuals and damaging economies, the imaging system described in this paper has the potential to provide an objective means of measuring and reporting lesion dimensions and providing a machine readable data archive for future s...
Article
This paper addresses the problem of estimating the Doppler frequency in Laser Doppler Velocimetry (LDV) systems by taking into account the effect of the particle trajectory via the measurement volume. The dependency of the burst length on the Cramér-Rao lower bound (CRLB) and the Doppler frequency estimation is investigated by employing the 2D mode...
Article
Full-text available
Interest in the nature of electrostatic charge build up on aerosol particles for inhalation has grown as pharmaceutical scientists seek to fully understand this complex phenomena and its influence on both pMDI and DPI performance. The net charge to mass ratios of aerosol particles have been measured with systems such as the ELPI and the eNGI. Bipol...
Conference Paper
The minimum achievable uncertainty of the Doppler frequency estimation of any unbiased estimator is given by the Cramér-Rao lower bound (CRLB). In this paper, we consider the effect of the particle trajectory via the measurement volume on the CRLB by employing the 2D model of the Gaussian envelope of the Doppler Burst Signal (DBS). The simulation r...
Article
Abstract The purpose of this paper is to present the design and implementation of a novel rule-based algorithm for the classification of sitting postures in the sagittal plane. The research focused on individuals with severe musculoskeletal problems and, thus, specific requirements for posture and pressure management. Clients' body shapes were capt...
Conference Paper
Full-text available
This paper evaluates the performance of a bespoke signal processing algorithm based on spectral analysis to obtain aerosol particle charge distribution. The measurement method is based on tracking particle motion in square-wave excitation electric field using Phase Doppler Anemometry (PDA). The system performance has been tested using Monte Carlo s...
Article
The purpose of this paper is to determine whether it is possible to use an automated measurement tool to clinically classify clients who are wheelchair users with severe musculoskeletal deformities, replacing the current process which relies upon clinical engineers with advanced knowledge and skills. Clients' body shapes were captured using the Car...
Conference Paper
In this paper we propose a fast brain computer interface speller based on electroencephalography (EEG). The slow performance of conventional BCI spellers is overcome by combining the fast motor evoked potentials (MEPs) with the accuracy of P300 event related potentials. The μ rhythms associated with motor imagery are extracted using morlet wavalet...
Article
This paper describes and compares two particle excitation methods, square and sine wave, used in conjunction with an application of phase Doppler anemometry to simultaneously obtain particle size and charge in real time. Different signal-processing strategies for particle velocity and size estimation are investigated, including quadrature demodulat...
Article
In this paper, a numerical model of aerosol Particle Charge and Size Analyzer is discussed together with the simulation results. In order to determine the optimal range of system parameters, the effect of drive frequency, strength of the electric field, mean flow velocity on the particle count percentage have been investigated based on the specific...
Conference Paper
This paper derives the Cramér-Rao Bound for the frequency estimation of the noisy Doppler Burst Signal from the Laser Doppler Anemometry. The problem is solved by considering the effect of the particle trajectory via the measurement volume together with the dependency of the burst length on the Doppler frequency. The results provide an analytical e...
Conference Paper
This paper describes and compares two particle excitation methods, square and sine wave, used in conjunction with novel application of Phase Doppler Anemometry (PDA) to obtain particle size and charge simultaneously in real time. Different signal processing strategies for particle velocity and size estimation are investigated, including Quadrature...
Article
This paper describes an integrated signal processing system based on Quadrature Demodulation (QD) and correlation techniques to obtain particle size and charge simultaneously using phase Doppler anemometry (PDA). By solving the equation of particle motion in an AC electric field combined with the measurement of its size and velocity, the magnitude...
Conference Paper
Full-text available
The paper discusses a novel noninvasive method of measurement of a charge level on a population of particles using phase doppler anemometry (PDA). The PDA system is used to track the motion of charged particles in the presence of an electric field. By solving the equation of particle motion in a viscous medium combined with the simultaneous measure...
Article
Current trends observed in air pollution control technology are closely related to the development of new, more efficient hybrid systems, i.e., those, which simultaneously utilize two or more physical mechanisms for dust or gaseous contaminants removal. These systems can operate more economically than conventional devices, especially in the removal...
Article
This paper describes a knowledge-based design tool enabling the generation of hot forging die designs from a component profile. The system integrates the hot forging die design process into a single framework and guides the user through the design process enabling the generation of forgeable geometry from a component profile taking into account mac...
Article
A multi-nozzle electrospray system was developed as a charged droplet source for cleaning a gas contaminated with fine particles. The efficiency of removal of fine particles from the gas can be significantly increased, as compared to uncharged sprays, when the droplets are electrically charged. In the presented experiments, the spray of the droplet...
Article
The paper outlines the development of a knowledge-based engineering (KBE) system for hot forging design using state–of–the–art technology and the Internet. The benefits of a KBE approach over a traditional design process are emphasized. The aim of the proposed KBE system is to integrate the hot forging design process into a single framework for cap...
Article
The effect of a shaped electrode geometry array on the dielectrophoretic transport and characterisation of nanometre-sized particles, including possible biological material, was investigated. Polarisable particles placed within a non-uniform electric field are subject to dielectrophoretic force acting upon them. Use was made of an electrode array t...
Article
Liquid sprayed by the electrohydrodynamic (EHD) method is atomized only by electrical forces without additional mechanical energy applied. EHD spraying is an effective method for generating electrically charged aerosol. The effect of liquid viscosities on the spraying process was investigated experimentally for distilled water and ethylene glycol m...
Article
Continual pressures, such as reducing time to market, have resulted in the increased use of virtual design and manufacturing tools such as the simulation of manufacturing process using FEA packages. The simulation of processes such as forging allows an assessment of the manufacturability of components to be made. The reliability and accuracy of res...
Article
This paper presents the results of the experimental study on pharmaceutical powders using the Bipolar Charge Measurements System (BCMS) developed at Brunel University. The main function of the BCMS is to provide fast, simultaneous measurement capability of the bipolar charge fractions on pharmaceutical aerosols delivered from medical dispensers, pr...
Article
The proposed noninvasive method of measurement of the charge level on a population of particles employs the phase Doppler anemometry (PDA) technique in conjunction with a high-resolution computer-controlled traversing system. The PDA system was used to track the motion of charged particles in the presence of a DC electric field. By solving the equa...
Article
The removal of fine aerosol particles such as dust or smoke by charged droplets was investigated experimentally. The droplets were sprayed by a rotary atomiser and simultaneously charged inductively. The cigarette smoke was used as a source of submicrometer dust. Smoke was charged in a specially designed corona-discharge charger. The suppression of...
Conference Paper
An array of microelectrodes was supplied with a dual-frequency electrical signal to create a non-uniform electric field that was used for a dielectrophoretic particle transport system. Dielectrophoretic force was used to convey sub-micron sized particles along the tips of electrodes. The particles were manipulated along an arrangement of fabricated...
Conference Paper
The proposed noninvasive method of measurement of the charge level on a population of particles employs the phase Doppler anemometry (PDA) technique in conjunction with a high-resolution computer controlled traversing system. The PDA system was used to track the motion of charged particles in the presence of a DC electric field. By solving the equa...
Article
This paper describes a novel automatic method for measurement of bipolar charge on aerosols. The developed system is dedicated to measuring aerosols existing in the form of short duration, high velocity plumes with a wide angle of particle dispersion. The system incorporates a front-end cylindrical arrangement consisting of two “D” shaped precipita...
Article
This paper reports the development of a bipolar charge measurement system for aerosol characterization. The system incorporates a front-end cylindrical arrangement consisting of two “D”-shaped precipitation sections. Each of these sections incorporates wire electrodes maintained at a high potential of opposite polarity. The interface between the tw...
Conference Paper
The purpose of the paper is to briefly review some of the methods used to obtain aerosol bipolar charge distribution and to describe a novel instrument developed at Brunel University. The bipolar charge aerosol classifier (BCAC) is an improved version of the authors' previously published bipolar charge measurement system (2001), eliminating some of...
Article
This paper describes four signal processing systems based on Phase Locked Loop and Quadrature Demodulation techniques to obtain particle charge in DC and AC electric field. The charge measurement technique measures the charge level on a population of particles using Phase Doppler Anemometry (PDA). By solving the equations of particle motion in a vi...

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Projects

Projects (6)
Project
This aim of the project is to develop a machine learning and advanced image processing algorithm which would lead to new approaches in skin monitoring and early melanoma detection. The proposed research will test the hypothesis that successful implementation of the machine learning algorithm on a mobile platform can improve diagnostic confidence and ability of General Practitioners (GPs) to manage patients within their own practice rather than relying on time consuming and costly referrals for face-to-face consultation with a dermatologist. The academic challenge involves developing a novel machine learning-based approach able to use the clinical evaluations of physicians to enhance their diagnostic capability. We will investigate the feasibility of developing a diagnostic system that would exploit knowledge and skills specific of each physician and enable the sharing of experts’ clinical experience. Such a software tool should support the early recognition and treatment of malignant lesions on the basis of evaluations of clinical parameters.
Archived project
Archived project
The main aim of this research project is to design a novel fully functional measurement instrument capable of measuring in real time a bipolar charge and size distribution of aerosol particles. The proposed method of aerosol charge and size characterisation uses the Phase Doppler Anemometry (PDA) to track the motion of charged particles in the presence of an AC electric field. In the AC field the oscillating particle passing through the measurement volume generates frequency modulated Doppler Burst Signal (DBS), which contains the information about the amplitude of the particle velocity. By solving the equation of a particle motion in a viscous medium combined with the simultaneous measurement of its size and the velocity by the PDA system, the magnitude as well as the polarity of the particle charge is resolved. The present work concerns the development of the low cost integrated signal processing method based on Quadrature Demodulation and Correlation Techniques to obtain particle charge and size in real time.