Filters








22 Hits in 1.4 sec

TouchBridge

Cassim Ladha, Karim Ladha, Jonathan Hook, Daniel Jackson, Patrick Olivier
2010 ACM International Conference on Interactive Tabletops and Surfaces - ITS '10  
The augmentation of tabletop multi-touch surfaces with physical objects is a well visited approach for the realisation of tangible user interfaces. Interaction with objects on a multitouch surface is often limited to spatial manipulation and common marker-based techniques for object tracking typically provide little more than position and orientation information for the objects. We present a novel, low-cost, approach for tracking objects on a camera-based multi-touch surface. Our approach
more » ... es modulated Infrared light to provide a bi-directional communication channel between objects and the surface and thereby presents the opportunity for much richer forms of interaction with physical objects. ACM Classification: H5.2 [Information interfaces and presentation]: User Interfaces -Input devices and strategies.
doi:10.1145/1936652.1936737 dblp:conf/tabletop/LadhaLHJO10 fatcat:islfebbysfdzxgv5r54li2eaqe

TouchBridge

Cassim Ladha, Karim Ladha, Jonathan Hook, Daniel Jackson, Gavin Wood, Patrick Olivier
2010 ACM International Conference on Interactive Tabletops and Surfaces - ITS '10  
The augmentation of tabletop multi-touch surfaces with physical objects is a well visited approach for the realisation of tangible user interfaces. Interaction with objects on a multitouch surface is often limited to spatial manipulation and common marker-based techniques for object tracking typically provide little more than position and orientation information for the objects. We present a novel, low-cost, approach for tracking objects on a camera-based multi-touch surface. Our approach
more » ... es modulated Infrared light to provide a bi-directional communication channel between objects and the surface and thereby presents the opportunity for much richer forms of interaction with physical objects. ACM Classification: H5.2 [Information interfaces and presentation]: User Interfaces -Input devices and strategies.
doi:10.1145/1936652.1936711 dblp:conf/tabletop/LadhaLHJWO10 fatcat:sdexaw22dfaaznlo5v4md2ejce

Touchbugs

Diana Nowacka, Karim Ladha, Nils Y. Hammerla, Daniel Jackson, Cassim Ladha, Enrico Rukzio, Patrick Olivier
2013 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems - CHI '13  
We present a novel approach to graspable interfaces using Touchbugs, actuated physical objects for interacting with interactive surface computing applications. Touchbugs are active tangibles that are able to move across surfaces by employing vibrating motors and can communicate with camera-based multi-touch surfaces using infrared LEDs. Touchbug's embedded inertial sensors and computational capabilities open a new interaction space by providing autonomous capabilities for tangibles that allow goal directed behavior.
doi:10.1145/2470654.2470761 dblp:conf/chi/NowackaLHJLRO13 fatcat:vlecpb4gv5gozkhpxca7wk2isu

The french kitchen

Clare J. Hooper, Patrick Olivier, Anne Preston, Madeline Balaam, Paul Seedhouse, Daniel Jackson, Cuong Pham, Cassim Ladha, Karim Ladha, Thomas Plötz
2012 Proceedings of the 2012 ACM Conference on Ubiquitous Computing - UbiComp '12  
Ubiquitous computing technologies have traditionally striven to augment objects and the environment with sensing capabilities to enable them to respond appropriately to the needs of the individuals in the environment. This paper considers how such technologies might be harnessed to support language learning, and specifically Task-Based Learning (TBL). Task-Based Learning (TBL) involves doing meaningful tasks in a foreign language, emphasising the language's use in practice. TBL is seen as a
more » ... ly engaging and motivating approach to learning a language, but is difficult to do in the classroom. Here, learners typically engage in activities that only simulate 'real-world' tasks, and as such only rehearse language use, rather than applying the language in practice. In this paper, we explore how an instrumented, context-aware environment whose design is grounded in pedagogical principles can support TBL. We present the French Kitchen, an instrumented kitchen for English speakers who are learning French, and describe a 46participant evaluation of the kitchen. Based on the evaluation, we provide a set of design recommendations for those building instrumented systems for TBL.
doi:10.1145/2370216.2370246 dblp:conf/huc/HooperPBSJPLLPO12 fatcat:tr2sasyh4nfl3h7eicdzts65fu

GaitKeeper: A System for Measuring Canine Gait

Cassim Ladha, Jack O'Sullivan, Zoe Belshaw, Lucy Asher
2017 Sensors  
Data analysis was performed using custom Matlab scripts developed by Cassim Ladha.  ...  The search window width was derived from results reported in Ladha et al. [43] . For FC times, the AP acceleration was decomposed using a 2nd order sym4 wavelet.  ... 
doi:10.3390/s17020309 pmid:28208707 pmcid:PMC5335924 fatcat:oku2zdsudfaijn3zmoi35iaeom

Empathy, participatory design and people with dementia

Stephen Lindsay, Katie Brittain, Daniel Jackson, Cassim Ladha, Karim Ladha, Patrick Olivier
2012 Proceedings of the 2012 ACM annual conference on Human Factors in Computing Systems - CHI '12  
We describe the development, application and evaluation of a design method tailored for working with people with mild to moderate dementia. Our experiences with the approach highlighted areas where designers and participants held radically different views. The tenet of our approach was that to overcome these differences we needed to create an empathic relationship between participants and designers. To achieve this we modified participatory design techniques to foster respectful engagement with
more » ... participants in the development of a digital aid to facilitate "safe walking". The process begins with broad qualitative scoping and design work then moves to developing personally tailored, individual designs to further exploration of the experiential elements of the domain while reducing the need for the participants to engage in abstract thought. Reflection highlights a number of important areas that demand consideration when undertaking research in this area and, more generally, when performing design work with people with dementia.
doi:10.1145/2207676.2207749 dblp:conf/chi/LindsayBJLLO12 fatcat:vcwu3n7ydrdtfn6g75rmlnzxc4

A Combined Approach to Predicting Rest in Dogs Using Accelerometers

Cassim Ladha, Christy Hoffman
2018 Sensors  
Data Analysis Tri-axial accelerometer data from each dog was subjected to a rotational correction algorithm described in Ladha et al. [15] .  ... 
doi:10.3390/s18082649 pmid:30104486 fatcat:7y6w2oyk7nduxdhvlm4jeppdii

Dog's life

Cassim Ladha, Nils Hammerla, Emma Hughes, Patrick Olivier, Thomas Ploetz
2013 Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing - UbiComp '13  
Health and well-being of dogs, either domesticated pets or service animals, are major concerns that are taken seriously for ethical, emotional, and financial reasons. Welfare assessments in dogs rely on objective observations of both frequency and variability of individual behaviour traits, which is often difficult to obtain in a dog's everyday life. In this paper we have identified a set of activities, which are linked to behaviour traits that are relevant for a dog's wellbeing. We developed a
more » ... collar-worn accelerometry platform that records dog behaviours in naturalistic environments. A statistical classification framework is used for recognising dog activities. In an experimental evaluation we analysed the naturalistic behaviour of 18 dogs and were able to recognise a total of 17 different activities with approximately 70% classification accuracy. The presented system is the first of its kind that allows for robust and detailed analysis of dog activities in naturalistic environments.
doi:10.1145/2493432.2493519 dblp:conf/huc/LadhaHHOP13 fatcat:sxnf73l5izh7lmkbq4te7cx26a

Deep learning-based automated speech detection as a marker of social functioning in late-life depression

Bethany Little, Ossama Alshabrawy, Daniel Stow, I. Nicol Ferrier, Roisin McNaney, Daniel G. Jackson, Karim Ladha, Cassim Ladha, Thomas Ploetz, Jaume Bacardit, Patrick Olivier, Peter Gallagher (+1 others)
2020 Psychological Medicine  
Background Late-life depression (LLD) is associated with poor social functioning. However, previous research uses bias-prone self-report scales to measure social functioning and a more objective measure is lacking. We tested a novel wearable device to measure speech that participants encounter as an indicator of social interaction. Methods Twenty nine participants with LLD and 29 age-matched controls wore a wrist-worn device continuously for seven days, which recorded their acoustic
more » ... Acoustic data were automatically analysed using deep learning models that had been developed and validated on an independent speech dataset. Total speech activity and the proportion of speech produced by the device wearer were both detected whilst maintaining participants' privacy. Participants underwent a neuropsychological test battery and clinical and self-report scales to measure severity of depression, general and social functioning. Results Compared to controls, participants with LLD showed poorer self-reported social and general functioning. Total speech activity was much lower for participants with LLD than controls, with no overlap between groups. The proportion of speech produced by the participants was smaller for LLD than controls. In LLD, both speech measures correlated with attention and psychomotor speed performance but not with depression severity or self-reported social functioning. Conclusions Using this device, LLD was associated with lower levels of speech than controls and speech activity was related to psychomotor retardation. We have demonstrated that speech activity measured by wearable technology differentiated LLD from controls with high precision and, in this study, provided an objective measure of an aspect of real-world social functioning in LLD.
doi:10.1017/s0033291719003994 pmid:31944174 pmcid:PMC8311821 fatcat:umcdpr5ajfeyhhtptmgg4nbdqq

Occupancy monitoring using environmental & context sensors and a hierarchical analysis framework

Aftab Khan, Thomas Plötz, James Nicholson, Sebastian Mellor, Daniel Jackson, Karim Ladha, Cassim Ladha, Jon Hand, Joseph Clarke, Patrick Olivier
2014 Proceedings of the 1st ACM Conference on Embedded Systems for Energy-Efficient Buildings - BuildSys '14  
Saving energy in residential and commercial buildings is of great interest due to diminishing resources. Heating ventilation and air conditioning systems, and electric lighting are responsible for a significant share of energy usage, which makes it desirable to optimise their operations while maintaining user comfort. Such optimisation requires accurate occupancy estimations. In contrast to current, often invasive or unreliable methods we present an approach for accurate occupancy estimation
more » ... ng a wireless sensor network (WSN) that only collects non-sensitive data and a novel, hierarchical analysis method. We integrate potentially uncertain contextual information to produce occupancy estimates at different levels of granularity and provide confidence measures for effective building management. We evaluate our framework in real-world deployments and demonstrate its effectiveness and accuracy for occupancy monitoring in both low-and high-traffic area scenarios. Furthermore, we show how the system is used for analysing historical data and identify effective room misuse and thus a potential for energy saving.
doi:10.1145/2674061.2674080 dblp:conf/sensys/KhanNMJLLHCOP14 fatcat:nzj322ghhfej3gdf53qsva4jji

Telematic dinner party

Pollie Barden, Rob Comber, David Green, Daniel Jackson, Cassim Ladha, Tom Bartindale, Nick Bryan-Kinns, Tony Stockman, Patrick Olivier
2012 Proceedings of the Designing Interactive Systems Conference on - DIS '12  
There is an increasing desire to remain connected when physically distant and computer-mediated communication (CMC) is one means of satisfying this desire. In particular, there is a growing trend for individuals to use commercially available technology to connect with friends and family in social and leisure settings. Drawing on this trend, performative arts and existing telecommunications research, we identify the social practice of sharing a meal together as ripe for reinterpretation within
more » ... C. We explore the opportunities to design a technology platform that supports remote guests in experiencing togetherness and playfulness within the practices of a traditional dinner party. Through both visual and aural channels as well as remote agency, the dinner guests were able to share a holistic telematic dining experience comparable to a traditional co-presence dinner. Based on the findings, we propose that one must consider the social structure and cultural background of users to inform the design of a technological intervention.
doi:10.1145/2317956.2317964 dblp:conf/ACMdis/BardenCGJLBBSO12 fatcat:egyfkuonlje2bdcl3a75vbvl5u

Instrumented gait assessment with a single wearable: an introductory tutorial

Silvia Del Din, Aodhán Hickey, Cassim Ladha, Sam Stuart, Alan K. Bourke, Patrick Esser, Lynn Rochester, Alan Godfrey
2016 F1000Research  
Gait is a powerful tool to identify ageing and track disease Background progression. Yet, its high resolution measurement via traditional instruments remains restricted to the laboratory or bespoke clinical facilities. The potential for that to change is due to the advances in wearables where the synergy between devices and smart algorithms has provided the potential of 'a gait lab on a chip'. : Commercially available wearables for gait quantification remain Methods expensive and are restricted
more » ... to a limited number of characteristics unsuitable for a comprehensive assessment required within intervention or epidemiological studies. However, the increasing demand for low-cost diagnostics has fuelled the shift in how health-related resources are distributed. As such we adopt open platform technology and validated research methodologies to harmonise engineering solutions to satisfy current epidemiological needs. : We provide an introduction to conduct a routine instrumented gait Results assessment with a discrete, low-cost, accelerometer-based wearable. We show that the capture and interpretation of raw gait signals with a common scripting language can be straightforward and suitable for use within modern studies. We highlight the best approaches and hope that this will help compliment any analytical tool-kit as part of future cohort assessments. : Deployment of wearables can allow accurate gait assessment in Conclusions accordance with advocated methods of data collection as there is a strong demand for sensitive outcomes derived from pragmatic tools. This tutorial shows that instrumentation of gait using a single open source wearable is pragmatic due to low-cost and translational analytical methods to derive sensitive outcomes.
doi:10.12688/f1000research.9591.1 fatcat:464ovovyabgqxfda6xh4dzaji4

Challenges for Designing new Technology for Health and Wellbeing in a Complex Mental Healthcare Context

Anja Thieme, Ashur Rafiev, Cassim Ladha, Thomas Nappey, Mathew Kipling, Peter Wright, Thomas D. Meyer, Patrick Olivier, John McCarthy, Paula Johnson, Stephanie Phillips, Jayne Wallace (+4 others)
2016 Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems - CHI '16  
This paper describes the challenges and lessons learned in the experience-centered design (ECD) of the Spheres of Wellbeing, a technology to promote the mental health and wellbeing of a group of women, suffering from significant mental health problems and living in a medium secure hospital unit. First, we describe how our relationship with mental health professionals at the hospital and the aspirations for person-centric care that we shared with them enabled us, in the design of the Spheres, to
more » ... innovate outside traditional healthcare procedures. We then provide insights into the challenges presented by the particular care culture and existing services and practices in the secure hospital unit that were revealed through our technology deployment. In discussing these challenges, our design enquiry opens up a space to make sense of experience living with complex mental health conditions in highly constrained contexts within which the deployment of the Spheres becomes an opportunity to think about wellbeing in similar contexts.
doi:10.1145/2858036.2858182 dblp:conf/chi/ThiemeMJPWLLJNR16 fatcat:qzh77mpt2vahlk7lhnwzpmyh6e

Behind the kitchen door: A novel mixed method approach for exploring the food provisioning practices of the older consumer

Helen Kendall, Mary Brennan, Chris Seal, Cassim Ladha, Sharron Kuznesof
2016 Food Quality and Preference  
., Ladha, C., Kuznesof, S., Behind the Kitchen Door: A novel mixed method approach for exploring the food provisioning practices of the older consumer, Food Quality and Preference (2016), doi: http://dx  ... 
doi:10.1016/j.foodqual.2016.06.005 fatcat:g66y4kdvdnb2rp7vhwpbo3jdne

Toward a low-cost gait analysis system for clinical and free-living assessment

Cassim Ladha, Silvia Del Din, Kianoush Nazarpour, Aodhan Hickey, Rosie Morris, Michael Catt, Lynn Rochester, Alan Godfrey
2016 2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)  
Gait is an important clinical assessment tool since changes in gait may reflect changes in general health. Measurement of gait is a complex process which has been restricted to bespoke clinical facilities until recently. The use of inexpensive wearable technologies is an attractive alternative and offers the potential to assess gait in any environment. In this paper we present the development of a low cost analysis gait system built using entirely open source components. The system is used to
more » ... pture spatio-temporal gait characteristics derived from an existing conceptual model, sensitive to ageing and neurodegenerative pathology (e.g. Parkinson's disease). We demonstrate the system is suitable for use in a clinical unit and will lead to pragmatic use in a free-living (home) environment. The system consists of a wearable (tri-axial accelerometer and gyroscope) with a Raspberry Pi module for data storage and analysis. This forms ongoing work to develop gait as a low cost diagnostic in modern healthcare.
doi:10.1109/embc.2016.7591086 pmid:28268692 dblp:conf/embc/LadhaDNHMCRG16 fatcat:bduahnf64nb3dmakfovddcvn6i
« Previous Showing results 1 — 15 out of 22 results