This paper discusses how calendars and time coordination can be used across social and organizational borders, bridging between work and non-work, and between family coordination and external collaborators. The paper moves beyond family on-line calendars towards coordination and collaboration with professional caregivers and public authorities, and discusses how such shared calendars revitalize...

Complex temporal expressions are widely used in daily life. A calendars is one of the important examples for this kind of expressions. In this paper, we study the query language on general calendars. A set of operators for calendar algebra is formed. Several formulas are put forward for the purpose of query optimization. Other properties including monotonicity, closure and uniqueness of operato...

This paper reports on a trial where a group of university students were given the opportunity to use high-end PDAs for their time management needs during two months. The purpose of the study was to gain insight through the fresh eyes of mostly novice users of electronic calendars; insight that could be used to propose improvements to current mobile digital calendar standard interface functional...

OBJECTIVES We examined the effectiveness of tailored calendars in increasing childhood immunization rates. METHODS Parents of babies aged birth to 1 year (n = 321) received individually tailored calendars promoting immunization from 2 urban public health centers. For each baby, an age- and sex-matched control was selected from the same center. Immunization status was tracked through age 24 mo...

This paper outlines ongoing work in the area of metadata for events which is being undertaken by Australia’s ICT (Information and Communications Technology) in education agency, education.au. Calendars of conferences, opportunities and celebrations of interest to Australia’s education and training community are a core service of Education Network Australia (edna), education.au’s premier service...

This article introduces a programming language approach to modelling spatio-temporal data using calendars and topologies specified as types. Calendric and topologic data appearing in Web applications are most often rather complex, sometimes involving different calendars and/or topologies. The basic principle is to model spatio-temporal data by means of predicate subtyping. This principle is use...