A5052263589- Phase-change materials and chalcogenides
- Advanced Memory and Neural Computing
- Animal Behavior and Welfare Studies
- Human-Animal Interaction Studies
- Transition Metal Oxide Nanomaterials
- Animal Disease Management and Epidemiology
- Effects of Environmental Stressors on Livestock
- Agriculture and Farm Safety
- Wildlife Ecology and Conservation
- Urban Heat Island Mitigation
- Neural Networks and Reservoir Computing
- Photonic and Optical Devices
- Photoreceptor and optogenetics research
- Chalcogenide Semiconductor Thin Films
University of Essex
2014-2023
University of Nottingham
2018
University of Exeter
2012-2014
Abstract Historically, the application of phase‐change materials and devices has been limited to provision non‐volatile memories. Recently, however, potential demonstrated for using as basis new forms brain‐like computing, by exploiting their multilevel resistance capability provide electronic mimics biological synapses. Here, a different previously under‐explored property that is also intrinsic devices, namely accumulation, exploited demonstrate nanometer‐scale can powerful form arithmetic...
Advances in bio-telemetry technology have made it possible to automatically monitor and classify behavioural activities many animals, including domesticated species such as dairy cows. Automated classification has the potential improve health welfare monitoring processes part of a Precision Livestock Farming approach. Recent studies used accelerometers pedometers cows, but approaches often cannot discriminate accurately between biologically important behaviours feeding, lying standing or...
Understanding the herd structure of housed dairy cows has potential to reveal preferential interactions, detect changes in behavior indicative illness, and optimize farm management regimes. This study investigated consistency proximity interaction network a permanently commercial throughout October 2014, using data collected from wireless local positioning system. Herd-level networks were determined sustained interactions (pairs continuously within three meters for 60 s or longer), assessed...
Lameness is a key health and welfare issue affecting commercial herds of dairy cattle, with potentially significant economic impacts due to the expense treatment lost milk production. Existing lameness detection methods can be time-intensive, under-detection remains problem leading delayed or missed treatment. Hence, there need for automated monitoring systems that quickly accurately detect in individual cows within herds. Recent advances sensor tracking technology have made it possible...
Phase-change devices exhibit characteristic threshold switching from the reset (off) to set (on) state. Mainstream understanding of this electrical phenomenon is that it initiated electronically via influence high electric fields on inter-band trap states in amorphous phase. However, recent work has suggested field induced (crystal) nucleation could instead be responsible. We compare and contrast these alternative “theories” realistic simulations device both with without dependent...
Bunching behavior in cattle may occur for several reasons including enabling social interactions, a response to stress or danger, due shared interest resources such as feeding watering areas. There is evidence pasture grazed that bunching more frequently at higher ambient temperatures, possibly sharing of fly-load seek shade from the direct sun under heat conditions. Here we demonstrate how associated with temperatures barn-housed UK dairy herd. A real-time local positioning system was used,...
Abstract Phase‐change materials exhibit some remarkable properties. They can be crystallized in picoseconds and amorphized femtoseconds, but remain stable against spontaneous crystallization for many years. huge differences optical electrical properties between the amorphous crystalline phases. Such have led, over last four decades, to successful development of both non‐volatile phase‐change memories. However, such binary memories only ‘scratch surface’ terms potential applications devices,...
Phase change memories are emerging as a most promising technology for future nonvolatile, solid-state, electrical storage. However, to compete effectively in mainstream storage applications, multilevel cell capability is desirable. Unfortunately, phase-change exhibit temporal drift programmed resistance (and threshold switching voltage) which appears be fundamental and universal property of the amorphous or partially phase. Phase-change device models should therefore include these effects...
Abstract Phase‐change materials are of intense research interest due mainly to their use in phase‐change memory (PCM) devices that emerging as a promising technology for future non‐volatile, solid‐state, electrical storage. Electrically driven transitions from the amorphous crystalline phase such exhibit characteristic threshold switching. Several alternative electronic explanations origins this behaviour have been put forward, example Poole–Frenkel effects, delocalisation tail states, field...