Ivan Andonovic - Academia.edu (original) (raw)
Papers by Ivan Andonovic
21st International Symposium on Industrial Crystallisation, Aug 30, 2021
Particle size and shape are important in the pharmaceutical industry, affecting both process effi... more Particle size and shape are important in the pharmaceutical industry, affecting both process efficiency and product performance. Quality-by-design and continuous manufacturing are aided with appropriate models of processes — selection and calibration of which are informed by measurement of particle size and shape. Off-line measurements have inherent limitations when following the trajectory of particle attributes in a process; removing and treating material for off-line analysis can alter particle characteristics. In contrast, in-line measurements provide representative measures of particle size and shape at the expense of producing more challenging (out of focus, overlapping particles) datasets for extraction of particle characteristics
Dynamic Ad-Hoc Networks
The provisioning of real-time applications such as voice and video over ad hoc networks have rece... more The provisioning of real-time applications such as voice and video over ad hoc networks have received a lot of attention among researchers mainly due to the increasing demand of this service among users. This is particularly challenging due to capacity requirements and stringent delay constraints. In general, wireless nodes have limited resources like capacity and battery power. In multi-hop wireless mobile networks, one of the key issues is how to route packets efficiently. Some of the important factors that need to be considered in designing a routing scheme for ad hoc networks are: minimum delivery latency, higher probability of packet delivery, energy efficiency and adaptability. Therefore, the design of an efficient and reliable routing scheme for such applications is a major challenge. This chapter provides background and describes related research efforts in single path and multipath routing in Mobile ad hoc Networks (MANETs). A brief outline of the operation as well as strengths and limitations of each scheme is presented. In addition, the open issues that must be addressed in the design of efficient routing algorithms are discussed.
IEE Proceedings - Optoelectronics, 2005
2022 23rd International Radar Symposium (IRS)
International Society for Autism Research Virtual Annual Meeting 2021, May 3, 2021
Background: Motor differences between children with autism spectrum disorders (ASD) and those wit... more Background: Motor differences between children with autism spectrum disorders (ASD) and those with typical development (TD) have been identified in various activities such as pointing (Torres et al., 2013) and placing (Crippa et al., 2014). Kinematic differences have also been observed in goal-oriented swipe kinematics during smart-tablet gameplay (Lu et al., 2019, 2020). General Tau Theory has been used to describe goal-oriented perception-action strategies (Lee, 2009), which proposes an intrinsic action guide generated by the nervous system coupled to the motor command to guide the physical movement. The coupling constant between the two is assumed to be set by the brain to coordinate the kinematic profile of the goal-oriented action. Here, an exploration to surface a potential difference in the tau-coupling during smart-tablet gameplay in children with ASD is presented. Objectives: To test whether or not the perception-action strategy employed by children with and without ASD differ during goal-oriented swipes in smart-tablet gameplay. Methods: Goal-oriented swipe data were extracted from a study of smart-tablet gameplay for young children (Anzulewicz et al., 2016). Only those swipes that proceeded directly from start to finish without overshooting the target were included. A total of 500 swipes were obtained from 32 children with ASD (aged 33-79 months), and 1426 swipes were obtained from 44 children with TD (aged 36-74 months). The percentage of tau-coupling in each swipe, its duration and distance, and the tau-coupling constant were determined utilising the time and x- and y-coordinates data. Results: Children with ASD demonstrated 97.90 ± 10.49 (mean ± SD) % while children with TD demonstrated 98.98 ± 7.54 % of tau-coupling movement, indicating a significantly weakening (t-test, p = 0.01) and more variable (F-test, p < 0.01) tau-coupling pattern in children with ASD. The coupling constant was 0.40 ± 0.93 for the ASD group and 0.41 ± 0.15 for the TD group. Children with ASD demonstrated a significantly wider range of the coupling constant than children with TD (F-test, p < 0.01) while the mean values were similar. Conclusions: The findings indicate that, in comparison to children with TD, children with ASD demonstrated significantly less tau-coupling with higher variability during swipes whilst engaging in smart-tablet gameplay. It should be noted that the coupling constant in ASD was significantly more variable, however, the mean value was similar to what was observed in TD. The results of the coupling constant imply that, for the overall movement, children with ASD and TD used similar strategies to perform the goal-oriented swipes while greater fluctuations were observed in ASD. These findings are consistent with previous reports indicating that individuals with ASD have difficulties in controlling goal-oriented movement efficiently with increased subsecond motor variability during the travel of the movement (Torres et al., 2013). Increased acceleration and jerk amplitudes noted in adults with ASD (Cook et al., 2013) suggests sensorimotor and timing are disrupted at the level of the brainstem integration (Delafield-Butt & Trevarthen, 2017). Therefore, disruption to efficient perception-action regulation by tau-coupling might be a critical motor disruption in ASD
Photonics in Switching, 2000
ABSTRACT
Conference on Optical Fiber Communication, 1994
ABSTRACT
Python pickle files containing raw acceleration data from internal bovine bolus acceleration sens... more Python pickle files containing raw acceleration data from internal bovine bolus acceleration sensors. Collected from 3 cows in period July 2015.
Extensive experimental investigation into detrimental effects of interferometric noise on incoher... more Extensive experimental investigation into detrimental effects of interferometric noise on incoherent OCDMA was conducted under varied amount of multiple access interference, with and without applying all-optical signal processing, to better understand and alleviate its influence.
Background: Atypical movement patterns in autism spectrum disorders (ASD) have been reported. Com... more Background: Atypical movement patterns in autism spectrum disorders (ASD) have been reported. Compared with typical developing (TD) children, children with ASD took more time to complete a point-to-point movement (Dowd et al., 2012), but adults with ASD performed faster horizontal arm swings than their typical counterparts (Cook et al., 2013). Incongruent kinematic results are common in the literature, which may imply that the kinematic features in ASD are task-dependent, but this is yet not well understood. Smart tablet gameplay has been proposed as a new paradigm to measure the movement features of ASD in young children (Anzulewicz et al., 2016). In this study, smart tablet games were employed to test for kinematic differences in autism, and the effect of the task. Objectives: The study aims to compute the swipe kinematics during smart tablet gameplay, and to compare these characteristic movements between ASD and TD children within different gameplay contexts. Methods: 37 ASD chil...
Wireless sensor systems have become an indispens- able solution for monitoring our environment, l... more Wireless sensor systems have become an indispens- able solution for monitoring our environment, large infrastruc- tures, assets even the health and well-being of humans and livestock. The paper presents three applications areas of Wireless Sensor Networks (WSNs) and highlights the system design challenges and their implementation. The first application focuses on load distribution and energy aware routing for Mobile Ad hoc Net- works (MANETs), where analytical and simulation based meth- ods are used to quantify and select appropriate routing schemes. The second application is the Condition Based Monitoring of Wind Turbine Generators and the deployment of such systems in extremely harsh environments. Finally, the last application imposes significantly different challenges in the emerging area of Body Area Networks for humans and livestock.
Digitisation of manufacturing processes under the umbrella of Industry 4.0 is a multi-faceted cha... more Digitisation of manufacturing processes under the umbrella of Industry 4.0 is a multi-faceted challenge, with requirements ranging from ensuring all relevant data is captured and has meaning, to combining and analysing data streams correctly, through to creating useful and intuitive real-time user interfaces. One such data stream that has more recently become of interest due to improved processing powers allowing near real-time, and in some cases real-time analysis, is image data. We will demonstrate as a case study how images can be used to help the pharmaceutical industry in the transition from batch to continuous processing through providing near real-time analysis of in-situ crystal images taken during the crystallisation process. Traditionally, particle size and shape measurements in pharmaceutical production have been made offline, therefore introducing the risk of altering particle properties during the procedure of taking samples, drying and measuring. More recently, instrum...
Animal, 2020
Worldwide, there is a trend towards increased herd sizes, and the animal-to-stockman ratio is inc... more Worldwide, there is a trend towards increased herd sizes, and the animal-to-stockman ratio is increasing within the beef and dairy sectors; thus, the time available to monitoring individual animals is reducing. The behaviour of cows is known to change in the hours prior to parturition, for example, less time ruminating and eating and increased activity level and tail-raise events. These behaviours can be monitored non-invasively using animal-mounted sensors. Thus, behavioural traits are ideal variables for the prediction of calving. This study explored the potential of two sensor technologies for their capabilities in predicting when calf expulsion should be expected. Two trials were conducted at separate locations: (i) beef cows (n = 144) and (ii) dairy cows (n = 110). Two sensors were deployed on each cow: (1) Afimilk Silent Herdsman (SHM) collars monitoring time spent ruminating (RUM), eating (EAT) and the relative activity level (ACT) of the cow, and (2) tail-mounted Axivity acc...
2015 17th International Conference on Transparent Optical Networks (ICTON), 2015
The paper reports on an evaluation of the impact of VLC system performance owing to sunlight irra... more The paper reports on an evaluation of the impact of VLC system performance owing to sunlight irradiance over the year for two representative locations, Cairo - Egypt and Berlin - Germany. The evaluation is extended to treat the impact of cloud coverage on system performance. The average system SNR, BER and achievable data rate are estimated for the most common surfaces used within indoor environments. A comparative analysis of the performance when shot noise due to sunlight is assumed to follow Gaussian statistics is also presented. The impact of LED panel placement on system performance has been conducted. The analysis yields the LED placement that provides the optimum SNR, fulfils the lighting specifications as governed by standards and minimises the fluctuation in the average SNR across the room to assure consistent provisioning. The analysis considers representative room shapes, room sizes, LED specification, evaluation workplace, LED panel size over different metrological conditions.
21st International Symposium on Industrial Crystallisation, Aug 30, 2021
Particle size and shape are important in the pharmaceutical industry, affecting both process effi... more Particle size and shape are important in the pharmaceutical industry, affecting both process efficiency and product performance. Quality-by-design and continuous manufacturing are aided with appropriate models of processes — selection and calibration of which are informed by measurement of particle size and shape. Off-line measurements have inherent limitations when following the trajectory of particle attributes in a process; removing and treating material for off-line analysis can alter particle characteristics. In contrast, in-line measurements provide representative measures of particle size and shape at the expense of producing more challenging (out of focus, overlapping particles) datasets for extraction of particle characteristics
Dynamic Ad-Hoc Networks
The provisioning of real-time applications such as voice and video over ad hoc networks have rece... more The provisioning of real-time applications such as voice and video over ad hoc networks have received a lot of attention among researchers mainly due to the increasing demand of this service among users. This is particularly challenging due to capacity requirements and stringent delay constraints. In general, wireless nodes have limited resources like capacity and battery power. In multi-hop wireless mobile networks, one of the key issues is how to route packets efficiently. Some of the important factors that need to be considered in designing a routing scheme for ad hoc networks are: minimum delivery latency, higher probability of packet delivery, energy efficiency and adaptability. Therefore, the design of an efficient and reliable routing scheme for such applications is a major challenge. This chapter provides background and describes related research efforts in single path and multipath routing in Mobile ad hoc Networks (MANETs). A brief outline of the operation as well as strengths and limitations of each scheme is presented. In addition, the open issues that must be addressed in the design of efficient routing algorithms are discussed.
IEE Proceedings - Optoelectronics, 2005
2022 23rd International Radar Symposium (IRS)
International Society for Autism Research Virtual Annual Meeting 2021, May 3, 2021
Background: Motor differences between children with autism spectrum disorders (ASD) and those wit... more Background: Motor differences between children with autism spectrum disorders (ASD) and those with typical development (TD) have been identified in various activities such as pointing (Torres et al., 2013) and placing (Crippa et al., 2014). Kinematic differences have also been observed in goal-oriented swipe kinematics during smart-tablet gameplay (Lu et al., 2019, 2020). General Tau Theory has been used to describe goal-oriented perception-action strategies (Lee, 2009), which proposes an intrinsic action guide generated by the nervous system coupled to the motor command to guide the physical movement. The coupling constant between the two is assumed to be set by the brain to coordinate the kinematic profile of the goal-oriented action. Here, an exploration to surface a potential difference in the tau-coupling during smart-tablet gameplay in children with ASD is presented. Objectives: To test whether or not the perception-action strategy employed by children with and without ASD differ during goal-oriented swipes in smart-tablet gameplay. Methods: Goal-oriented swipe data were extracted from a study of smart-tablet gameplay for young children (Anzulewicz et al., 2016). Only those swipes that proceeded directly from start to finish without overshooting the target were included. A total of 500 swipes were obtained from 32 children with ASD (aged 33-79 months), and 1426 swipes were obtained from 44 children with TD (aged 36-74 months). The percentage of tau-coupling in each swipe, its duration and distance, and the tau-coupling constant were determined utilising the time and x- and y-coordinates data. Results: Children with ASD demonstrated 97.90 ± 10.49 (mean ± SD) % while children with TD demonstrated 98.98 ± 7.54 % of tau-coupling movement, indicating a significantly weakening (t-test, p = 0.01) and more variable (F-test, p < 0.01) tau-coupling pattern in children with ASD. The coupling constant was 0.40 ± 0.93 for the ASD group and 0.41 ± 0.15 for the TD group. Children with ASD demonstrated a significantly wider range of the coupling constant than children with TD (F-test, p < 0.01) while the mean values were similar. Conclusions: The findings indicate that, in comparison to children with TD, children with ASD demonstrated significantly less tau-coupling with higher variability during swipes whilst engaging in smart-tablet gameplay. It should be noted that the coupling constant in ASD was significantly more variable, however, the mean value was similar to what was observed in TD. The results of the coupling constant imply that, for the overall movement, children with ASD and TD used similar strategies to perform the goal-oriented swipes while greater fluctuations were observed in ASD. These findings are consistent with previous reports indicating that individuals with ASD have difficulties in controlling goal-oriented movement efficiently with increased subsecond motor variability during the travel of the movement (Torres et al., 2013). Increased acceleration and jerk amplitudes noted in adults with ASD (Cook et al., 2013) suggests sensorimotor and timing are disrupted at the level of the brainstem integration (Delafield-Butt & Trevarthen, 2017). Therefore, disruption to efficient perception-action regulation by tau-coupling might be a critical motor disruption in ASD
Photonics in Switching, 2000
ABSTRACT
Conference on Optical Fiber Communication, 1994
ABSTRACT
Python pickle files containing raw acceleration data from internal bovine bolus acceleration sens... more Python pickle files containing raw acceleration data from internal bovine bolus acceleration sensors. Collected from 3 cows in period July 2015.
Extensive experimental investigation into detrimental effects of interferometric noise on incoher... more Extensive experimental investigation into detrimental effects of interferometric noise on incoherent OCDMA was conducted under varied amount of multiple access interference, with and without applying all-optical signal processing, to better understand and alleviate its influence.
Background: Atypical movement patterns in autism spectrum disorders (ASD) have been reported. Com... more Background: Atypical movement patterns in autism spectrum disorders (ASD) have been reported. Compared with typical developing (TD) children, children with ASD took more time to complete a point-to-point movement (Dowd et al., 2012), but adults with ASD performed faster horizontal arm swings than their typical counterparts (Cook et al., 2013). Incongruent kinematic results are common in the literature, which may imply that the kinematic features in ASD are task-dependent, but this is yet not well understood. Smart tablet gameplay has been proposed as a new paradigm to measure the movement features of ASD in young children (Anzulewicz et al., 2016). In this study, smart tablet games were employed to test for kinematic differences in autism, and the effect of the task. Objectives: The study aims to compute the swipe kinematics during smart tablet gameplay, and to compare these characteristic movements between ASD and TD children within different gameplay contexts. Methods: 37 ASD chil...
Wireless sensor systems have become an indispens- able solution for monitoring our environment, l... more Wireless sensor systems have become an indispens- able solution for monitoring our environment, large infrastruc- tures, assets even the health and well-being of humans and livestock. The paper presents three applications areas of Wireless Sensor Networks (WSNs) and highlights the system design challenges and their implementation. The first application focuses on load distribution and energy aware routing for Mobile Ad hoc Net- works (MANETs), where analytical and simulation based meth- ods are used to quantify and select appropriate routing schemes. The second application is the Condition Based Monitoring of Wind Turbine Generators and the deployment of such systems in extremely harsh environments. Finally, the last application imposes significantly different challenges in the emerging area of Body Area Networks for humans and livestock.
Digitisation of manufacturing processes under the umbrella of Industry 4.0 is a multi-faceted cha... more Digitisation of manufacturing processes under the umbrella of Industry 4.0 is a multi-faceted challenge, with requirements ranging from ensuring all relevant data is captured and has meaning, to combining and analysing data streams correctly, through to creating useful and intuitive real-time user interfaces. One such data stream that has more recently become of interest due to improved processing powers allowing near real-time, and in some cases real-time analysis, is image data. We will demonstrate as a case study how images can be used to help the pharmaceutical industry in the transition from batch to continuous processing through providing near real-time analysis of in-situ crystal images taken during the crystallisation process. Traditionally, particle size and shape measurements in pharmaceutical production have been made offline, therefore introducing the risk of altering particle properties during the procedure of taking samples, drying and measuring. More recently, instrum...
Animal, 2020
Worldwide, there is a trend towards increased herd sizes, and the animal-to-stockman ratio is inc... more Worldwide, there is a trend towards increased herd sizes, and the animal-to-stockman ratio is increasing within the beef and dairy sectors; thus, the time available to monitoring individual animals is reducing. The behaviour of cows is known to change in the hours prior to parturition, for example, less time ruminating and eating and increased activity level and tail-raise events. These behaviours can be monitored non-invasively using animal-mounted sensors. Thus, behavioural traits are ideal variables for the prediction of calving. This study explored the potential of two sensor technologies for their capabilities in predicting when calf expulsion should be expected. Two trials were conducted at separate locations: (i) beef cows (n = 144) and (ii) dairy cows (n = 110). Two sensors were deployed on each cow: (1) Afimilk Silent Herdsman (SHM) collars monitoring time spent ruminating (RUM), eating (EAT) and the relative activity level (ACT) of the cow, and (2) tail-mounted Axivity acc...
2015 17th International Conference on Transparent Optical Networks (ICTON), 2015
The paper reports on an evaluation of the impact of VLC system performance owing to sunlight irra... more The paper reports on an evaluation of the impact of VLC system performance owing to sunlight irradiance over the year for two representative locations, Cairo - Egypt and Berlin - Germany. The evaluation is extended to treat the impact of cloud coverage on system performance. The average system SNR, BER and achievable data rate are estimated for the most common surfaces used within indoor environments. A comparative analysis of the performance when shot noise due to sunlight is assumed to follow Gaussian statistics is also presented. The impact of LED panel placement on system performance has been conducted. The analysis yields the LED placement that provides the optimum SNR, fulfils the lighting specifications as governed by standards and minimises the fluctuation in the average SNR across the room to assure consistent provisioning. The analysis considers representative room shapes, room sizes, LED specification, evaluation workplace, LED panel size over different metrological conditions.