A5020781546- Innovative Human-Technology Interaction
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Semiconductor Quantum Structures and Devices
- Advanced Optical Sensing Technologies
- Green IT and Sustainability
- Optical Network Technologies
- Advanced Fiber Laser Technologies
- Advanced Photonic Communication Systems
- Archaeology and Historical Studies
- Persona Design and Applications
- Design Education and Practice
- Mobile Crowdsensing and Crowdsourcing
- Historical and Linguistic Studies
- Advanced Semiconductor Detectors and Materials
- Biblical Studies and Interpretation
- Smart Cities and Technologies
- Innovative Approaches in Technology and Social Development
- Technology Use by Older Adults
- Interactive and Immersive Displays
- Ocular and Laser Science Research
- Recycling and Waste Management Techniques
- IoT and Edge/Fog Computing
- Microwave Engineering and Waveguides
- Microwave and Dielectric Measurement Techniques
Lancaster University
2015-2024
DEVCOM Army Research Laboratory
1993-2018
Adelphi Laboratory Center
1989-2005
University of Florida
2004
Johns Hopkins University Applied Physics Laboratory
1988
United States Army Combat Capabilities Development Command
1985
Tyrell: Is this to be an empathy test? Capillary dilation of the so-called blush response? Fluctuation pupil. Involuntary iris... Deckard: We call it Voight-Kampff for short. Design fiction is a broad term that occupies space within wider miscellany speculative design approaches and appearing as nascent method HCI research. The factor differentiates distinguishes from other its novel use world building in paper we consider whether there value creating fictional research worlds through which...
The results of a measurement intercomparison aimed at assessing the systematic errors in near-millimetre-wavelength dielectric measurements on reasonably transparent solid specimens are presented and discussed. Various monochromatic, broad band, guided wave free space methods were intercompared frequency region from 30 to 900 GHz using round-robin refractive index absorption coefficient seven specimens. Typically, up 1% found results, while very much larger results.< <ETX...
(2019). Spimes Not Things. Creating A Design Manifesto For Sustainable Internet of The Journal: Vol. 22, Running with Scissors: 13th International Conference the European Academy Design, Dundee, 10-12th April, 2019, edited by Louise Valentine, Joanna Bletcher and Leon Cruickshank, pp. 2133-2152.
We have designed a simplified true-time-delay beamforming architecture using integrated photonics for phased-array antennas. This can independently control multiple RF beams simultaneously with only single tuning parameter to steer the beam in each direction beam. made proof-of-the-principle demonstration of an X-band, 30×4-elements, fiber-optics-based beamformer one-dimensional steering transmission mode. The goal is develop semiconductor-based photonic circuit so that 2D array both...
In this critique, we problematize the framing of technological futures in design and computing discourse through rhetorical devices such as Futures Cone which contend promotes a one-world-world perspective, that it assumes collective (western) acceptance particular historicity notions time progress. This perspective currently dominates practical implementation many new systems. To counter orthodoxies, instead adopt an alternate primarily draws from work Brazilian philosopher Alvaro Vieira...
The U.S. Army Research Laboratory (ARL) is currently investigating unique self-mixing detectors for ladar systems. These have the ability to internally detect and down-convert light signals that are amplitude modulated at ultra-high frequencies (UHF). ARL also a architecture based on FM/cw radar principles, whereby range information contained in low-frequency mixing product derived by reference UHF chirp with detected, time-delayed chirp. When inserted into architecture, detector eliminates...
Our everyday interactions with numerous smart devices, digital services and the Internet are creating enormous volumes of data. Almost half data created globally is now said to originate from Things Artificial Intelligence (IoT-AI) systems. Further, processing such its transmission ‘Edge computing networks’ ‘the Cloud’ back again, significantly contributing ICT's carbon footprint almost 4% global CO2 emissions. These emissions increasingly affecting planet's natural environment as they...
The Internet of Things (IoT) and ubiquitous computing are leading to an increase in objects with a short lifespan - either through breakage, "bricking" by the manufacturer, or discontinued use owner. This leads surplus material e-waste that cannot is not readily recycled, upcycled otherwise reused, aggravating scarcity. In part, this due unrecyclable materials custom-built hardware. However, it also limited value people place on these (e.g., sentimental environmental). one-day workshop will...
This paper presents a design fiction created by the author – Toaster For Life. The is an initial prototype that seeks to embody Sterling's concept of spimes which when viewed simply, are class near future, sustainable, manufactured objects designed make implicit impacts technological product's entire lifestyle more explicit its potential users. argues properly understood, act as rhetorical device can be used lens through designers speculate and reflect upon sustainable product futures whilst...
While prosocial behaviour is often described as intended to help and benefit others, it primarily considered through an anthropocentric lens in that the others question are principally humans. In this research, we consider designed systems whereby benefits relate non-human actants, although people may gain benefit, a consequence of being part larger assemblage humans/non-humans. To achieve this, go beyond human centred approaches, associated with design interactive systems, draw on...
We report on the fabrication and characterization of interdigitated finger, optical detectors/mixers. These devices are used in an FM/cw ladar system to detect demodulate low intensity amplitude-modulated signals. Three different types finger structure were tested compared this study. also present a theory explain asymmetry observed discuss its implication application.
With ever increasing demands on healthcare around the world, ensuring adequate provision for patients is becoming more and challenging. In this paper, we focus future provision, specifically looking at how Do-It-Yourself (DIY) Medical Devices might become widely adopted. Our motivation to move beyond current debates, which tend technological capabilities, instead consider implications of those technologies policy regulation. Discussions are often challenging, as people find it difficult...
This paper unpacks Sterling's concept of spimes and outlines how it can be developed as a lens through which to speculate reflect upon the future more preferable sustainable technological products. The term denotes class near future, sustainable, manufactured objects, unlike disposable products, permeate our society today, spime would designed so that managed sustainably throughout its entire lifecycle. have goal making implicit consequences product obsolescence unsustainable disposal...
Vaunted as the next frontier within scope of Internet Things (IoT), Edge Computing (EC) is seen a means to improve efficiency and privacy across IoT infrastructures. This because it enables data be processed where originates, that is, at so-called ‘edge’ network, this being within, or close to, individual Internet-connected devices. Consequently, EC considered more secure than conventional processing methods need not travel over networks from centralised ‘Cloud’. We argue optimisation might...
Materials known to have useful properties in the IR were examined millimeter wave region. Their complex indices of refraction been determined 90–550-GHz range. The method determination was nondispersive Fourier transform spectroscopy. instrument employed a polarizing interferometer.
Whilst the recent introduction of Right-to-Repair to European citizens is undoubtedly a step forward in tackling planned obsolescence, and resultant deluge electronic product waste – efficacy this new legislation reliant on consumers availing themselves right. Given that repairing maintaining devices will often require specialist knowledge skills, it difficult assess how effective right may prove be practice. To address concern, we draw from expanding infusion datafication Artificial...
IoT products are increasingly becoming the default, with non-IoT versions of common hardware (e.g., TVs and printers) harder to find. Alongside this adoption surge, lack support, outdated security, planned obsolescence present concerning sustainability issues, contribute eWaste growth widen digital divides globally. This workshop aims discuss legal, social, technical, design aspects repair practices, engaging Ubicomp community in exploring challenges opportunities for more repairable...
We report on temporal response measurements of InGaAs metal–semiconductor–metal photodetectors (MSM–PDs) under high-illumination conditions. The peak current efficiency the MSM–PDs decreases as optical pulse energy increases due to space-charge-screening effects. screening effect begins occur at an low 1.0 pJ, predicted by a recent two-dimensional model. fall time and full width half maximum impulse increase decrease bias voltage increases. For energies between 100 rise displays U-shaped...
We present an RF-photonic time-domain auto-correlator using a dispersion-induced stepped-time-delay of the modulation sidebands produced by fiber optic recirculation loop circuit. This allows spectrum analysis single RF-pulse.
We posit that as aging populations grow, so too will the demand for wearable devices help people manage their chronic health conditions autonomously, at home, without medical supervision. Although healthcare providers are now integrating wearables into frontline services, regulatory journey from consumer use to patient these is complex and oft protracted due strict legislation. Through creation of a design fiction -- HealthBand we explore how open source crowd-funded might impact future...
We developed a fiber-optic-loop based system that replicates single RF input pulse to produce thousands of signal pairs in time domain for auto-correlation processing. A new noise redistribution feature improved the signal-to-noise performance which allows high resolution spectral analysis signal-pulse.