We investigate the spectral line shape of radiative intersubband transitions in a quantum well as determined by two factors: the electron scattering rate from states of given energy and the mass difference between the two subbands involved. The interplay between these factors leads to an essentially non-Lorentzian form of the spectral line. We develop an analytic theory of the line shape and ca...

We describe the injection of hot electrons into an aqueous solution by use of a Ta/Ta2O5 electrode. Evidence for this process was obtained by studying the chemically irreversible reduction of N-methylpyridinium ion (NMP+, E° ) -1.37 V vs SHE). The reduction of NMP+ gives rise to a radical which undergoes rapid dimerization to produce a water-insoluble species, 1,1-tetrahydrobipyridine (TBP), th...

This paper aims to outline some of the key challenges towards a HCI for positive change. Drawing on previous empirical studies concerning the development of positive expressive technologies for social wellness, this paper is a delineation of some of the key challenges in terms of theoretical underpinnings, design and evaluation of technologies that aim to contribute to happy beings in

This panel will take the form of a public debate about whether the conference of which it forms part has a future. Academic conferences are increasingly hard to cost-justify and growing awareness of the environmental impact adds to the negative aspects – especially when the HCI community have developed so many tools and techniques to afford virtual collaboration, dissemination and critique. Yet...

Rapid advancements are being made in the field of HCI. However, most commercial designs using these technologies employ limited control schema and privilege interactions borrowed from pre-existing technologies. This paper suggests considering the whole body to create rich environments using coadaptive technologies.

Recent discussions within the HCI community around designing software and devices for “coolness” have identified the importance of playfulness as an aspect of cool products. Game studies, as a field of inquiry, has long been occupied with understanding playfulness, so it stands to reason that findings from this field might also support playfulness and therefore coolness outside the context of g...

Der in diesem Beitrag skizzierte Überblick über die Langzeitentwicklung der Hardware-Bedienschnittstellen der Informationsund Computertechnik soll technikgenetische Zusammenhänge und Entwicklungsmuster herausarbeiten, die für die Bewertung der derzeitigen Interface-Krise von Interesse sein können. Mit Blick auf den Charakter einer Einführung in den Workshop wird auf Belege und Literaturangaben ...

Much HCI research has been devoted to encouraging sustainable decisions, but only recently have researchers begun to engage with how users define sustainability. This study explores the definition of sustainability, and its relation to other concerns, among visitors to a farmers’ market. Using cultural probes, we are exploring not only how people define sustainability, but also how the constitu...

In this position paper, the two terms design-oriented research and research-oriented design are studied and discussed in some detail in relation to HCI. In designoriented research—where research is the area and design the means—the production of new knowledge and the questioning of problem descriptions and other kinds of limitations to the freedom of design are seen as characterizing elements. ...