David R. Morse

Using while moving: HCI issues in fieldwork environments

“Using while moving” is the basic ability fieldwork users require of a mobile computer system. These users come from a wide range of backgrounds but have in common an extremely mobile and dynamic workplace. We identify four specific characteristics of this class of users: dynamic user configuration, limited attention capacity, high-speed interaction, and context dependency. A prototype is then presented that was designed to assist fieldworkers in data collection tasks and to explore the HCI design issues involved. The prototype was used in an extensive field trial by a group of ecologists observing giraffe behavior in Kenya. Following this trial, improvements were made to the prototype interface which in turn was tested in a subsequent field trial with another group of ecologists. From this experience, we have formulated our resulting ideas about interface design for fieldworkers into two general principles: Minimal Attention User Interfaces (MAUIs) and context awareness. The MAUI seeks to minimize the attention, though not necessarily the number of interactions, required from the user in operating a device. Context awareness enables the mobile device to provide assistance based on a knowledge of its environment.

AudioGPS: Spatial Audio Navigation with a Minimal Attention Interface

Abstract: In this paper we describe a prototype spatial audio user interface for a Global Positioning System (GPS). The interface is designed to allow mobile users to carry out location tasks while their eyes, hands or attention are otherwise engaged. Audio user interfaces for GPS have typically been designed to meet the needs of visually impaired users, and generally, though not exclusively, employ speech-audio. In contrast, our prototype system uses a simple form of non-speech, spatial audio. This paper analyses various candidate audio mappings for location and distance information. A variety of tasks, design considerations, design trade-offs and opportunities are considered. The findings from pilot empirical testing are reported. Finally, opportunities for improvements to the system and for future evaluation are explored.

Issues in Developing Context-Aware Computing

Two differing context-aware projects are described in this paper as a basis for exploring and better understanding the nature of context and context-aware applications. The investigation reveals that although indeed a useful concept, better supporting infrastructure is required before it can become a feasible mainstream technology. In particular, we propose the concept of a context information service to address this need, and define the general characteristics that such a service should exhibit.

Developing Personal Technology for the Field

This paper is concerned with developing personal computing aids for the mobile fieldworker. A description of mobile computing and context-aware technology is given, suggesting how hand-held computing devices that are aware of various factors of their userís environment (such as location) could be helpful. In particular, the concept of a stick-e note is introduced as a general-purpose context-aware technology that we have developed. The needs of fieldworkers and the suitability of stick-e note technology to their tasks is addressed, and a number of areas where stick-e note technology could help are identified. The design of a prototypical sticke-e note system that attempts to meet these needs is introduced and an account given of an extensive trial of this prototype in assisting in a behavioural study of giraffe in Kenya.

Situated Interaction and Context-Aware Computing

Introduction to a special issue of the journal Personal and Ubiquitous Computing that provides a comprehensive overview of current ubiquitous computing research in the fields of situated interaction and context-aware computing.

XML schemas and mark-up practices of taxonomic literature

Abstract We review the three most widely used XML schemas used to mark-up taxonomic texts, TaxonX, TaxPub and taXMLit. These are described from the viewpoint of their development history, current status, implementation, and use cases. The concept of “taxon treatment” from the viewpoint of taxonomy mark-up into XML is discussed. TaxonX and taXMLit are primarily designed for legacy literature, the former being more lightweight and with a focus on recovery of taxon treatments, the latter providing a much more detailed set of tags to facilitate data extraction and analysis. TaxPub is an extension of the National Library of Medicine Document Type Definition (NLM DTD) for taxonomy focussed on layout and recovery and, as such, is best suited for mark-up of new publications and their archiving in PubMedCentral. All three schemas have their advantages and shortcomings and can be used for different purposes.

Direct combination: a new user interaction principle for mobile and ubiquitous HCI

Direct Combination (DC) is a recently introduced user interaction principle. The principle (previously applied to desktop computing) can greatly reduce the degree of search, time, and attention required to operate user interfaces. We argue that Direct Combination applies particularly aptly to mobile computing devices, given appropriate interaction techniques, examples of which are presented here. The reduction in search afforded to users can be applied to address several issues in mobile and ubiquitous user interaction including: limited feedback bandwidth; minimal attention situations; and the need for ad-hoc spontaneous interoperation and dynamic reconfiguration of multiple devices. When Direct Combination is extended and adapted to fit the demands of mobile and ubiquitous HCI, we refer to it as Ambient Combination (AC). Direct Combination allows the user to exploit objects in the environment to narrow down the range of interactions that need be considered (by system and user). When the DC technique of pairwise or n-fold combination is applicable, it can greatly lessen the demands on users for memorisation and interface navigation. Direct Combination also appears to offers a new way of applying context-aware information. In this paper, we present Direct Combination as applied ambiently through a series of interaction scenarios, using an implemented prototype system.

Supporting Distributed Team Working in 3D Virtual Worlds: A Case Study in Second Life

Purpose – The purpose of this paper is to report on a study into how a three‐dimensional (3D) virtual world (Second Life) can facilitate socialisation and team working among students working on a team project at a distance. This models the situation in many commercial sectors where work is increasingly being conducted across time zones and between multiple teams. Collaboration in these geographically distributed teams is virtual rather than through face‐to‐face interactions. The paper investigates how a virtual world such as Second Life compares to other collaboration tools such as instant messaging or Skype; and the challenges that students experience in becoming acquainted with and working in Second Life.Design/methodology/approach – The paper has employed a qualitative research methodology involving data collection through group interviews, epistolary (email) interviews and semi‐structured individual interviews. The data have been analysed by applying the inductive analysis technique.Findings – The ana...

Rough Set Approximation as formal concept

Formal Concept Analysis (FCA) defines a formal concept as a pair of sets: objects and attributes, called extent and intent respectively. A rough set, on the other hand, approximates a concept using sets of objects only (in terms of FCA). We show that 1) a formal concept can be composed using a set of objects and its complement, 2) such object-based formal concepts are isomorphic to formal concepts based on objects and attributes, 3) upper and lower approximations of rough sets give generalization of formal concept, and 4) the pair of positive and negative sets (sensu rough set theory) are isomorphic to complemental formal concepts when the equivalence of the rough set gives positive and negative sets unique to each of the formal concepts. Implications of this are discussed.

A Glossary of Terms Used in Nonlinear Dynamics

This glossary has been compiled to assist those readers who are new to time series analysis and nonlinear dynamics. The majority of terms defined are in these fields, although certain terms from population biology have also been defined for those readers who have a background in nonlinear dynamics rather than population biology.