Support for Distributed Teams in eXtreme Programming

The extreme Programming methodology (XP) relies on co-located collaboration of programming teams. This paper discusses problems and possible solutions when distributed teams decide to do XP. Communication and awareness support are the keys to the successful distribution of programming teams. The XP methodology is analysed with respect to these essential issues. We present TUKAN, which is a synchronous distributed team programming environment, which applies groupware research results to the XP domain and solves the problems which arise when XP is carried out by distributed teams. Keywords eXtreme Programming, CSCW, groupware, distribution, awareness, communication, coordination, TUKAN 1 Introduction The eXtreme Programming (XP) methodology [1] heavily relies on group members being co-located. Rich communications within the team and a high degree of awareness of the actions, which are performed by others, are essential aspects of XP. Unfortunately, co-located collaboration is not po..

Modeling Collaboration using Shared Objects

Many object-oriented toolkits and frameworks for group-ware development provide shared objects as a basic service. This relieves developers of a lot of problems originating from the field of distributed systems. However, there is little support on how to use shared objects to actually build col-laborative applications. In this paper we propose an object-oriented model for applications using shared objects. The model is discussed with respect to object-oriented reusability aspects and its applicability is tested against CSCW-specific aspects like the provision of group-awareness and coupling control. Furthermore, concrete model examples derived from an example application are shown for illustration

Designing object-oriented synchronous groupware with COAST

This paper introduces COAST, an object-oriented toolkit for the development of synchronous groupware, which enhances the usability and simplifies the development of such applications. COAST offers basic and generic components for the design of synchronous groupware and is complemented by a methodology for groupware development. Basic features of the toolkit include transaction-controlled access to replicated shared objects, transparent replication management, and a fully optimistic concurrency control. Development support is provided by a session concept supporting the flexible coupling of shared objects' aspects between concurrent users and by a fully transparent updating concept for displays which is based on declarative programming. KEYWORDS: toolkit, synchronous collaboration, groupware, replicated objects, sessions, display updating, concurrency control 1 INTRODUCTION Groupware allows several geographically distributed people to work together with the aid of a computerized envi..

SWEAT: Snow Water Equivalent with AlTimetry

International audienceTeam Orange would like to thank FFG and ESA for organising the Summer School Alpbach 2016. Also thanks to all the tutors and lecturers guiding Team Orange towards this product, and a special thank to our team tutors. Abstract Snow Water Equivalent (SWE) is not directly measured by current satellite missions but has a significant impact on society and our lack of understanding contributes to significant inaccuracies in current estimations of hydrological and climate models, calculations of the Earth's energy balance (albedo) and flood predictions. To address this, the SWEAT (Snow Water Equivalent with AlTimetry) mission aims to measure SWE directly on sea ice and land in the polar regions above 60 • and below-60 • latitude. The primary scientific objectives are to (a) improve estimations of global SWE from passive microwave products and (b) improve numerical snow and climate models. The mission will implement a novel combination of Ka-and Ku-band radioaltimeter technology, each providing different snow penetration properties. Airborne Laser altimeter campaigns will shadow the satellite orbit path early, middle and late winter for the first two years of the mission to confirm Ka-Band surface measurement accuracies. The combined difference in signal penetration results will enable more accurate determination of SWE.Therefore, the SWEAT mission aims to improve estimations of global SWE interpreted from passive microwave products, and improve the reliability of numerical snow and climate models