__________________________________________________________________________________________This research presents a systematic literature review of motivation in Software Engineering. The objective is to report on what motivates and de-motivates developers, and how existing models address motivation. The majority of studies find Software Engineers form a distinguishable occupational group. Results indicate that Software Engineers are likely to be motivated according to: their 'characteristics' (e.g., their need for variety); internal 'controls' (e.g., their personality) and external 'moderators' (e.g., their career stage). Models of motivation in Software Engineering are disparate and do not reflect the complex needs of Software Engineers in their different career stages, cultural and environmental settings.

Abstract. Due to a number of similarities between user-centred design (UCD) and agile development, coupled with an appreciation that developers are rarely usability experts, it seems attractive to integrate these two approaches. However, although agile methods share some of the same aims as UCD, there are also distinct differences. These differences have made the use of these methods on development projects problematic. This paper reports a field study designed to investigate the use of agile methods alongside UCD in one particular organization. The aim of the study was to develop a framework for use by project teams wishing to integrate UCD practices with agile development. The study, its findings and five principles for integrating UCD and agile development arising from this work are discussed.

We present the philosophy, design, and initial evaluation of the Trio Testbed, a new outdoor sensor network deployment that consists of 557 solar-powered motes, seven gateway nodes, and a root server. The testbed covers an area of approximately 50,000 square meters and was in continuous operation during the last four months of 2005. This new testbed in one of the largest solar-powered outdoor sensor networks ever constructed and it offers a unique platform on which both systems and application software can be tested safely at scale. The testbed is based on Trio, a new mote platform that provides sustainable operation, enables efficient in situ interaction, and supports fail-safe programming. The motivation behind this testbed was to evaluate robust multi-target tracking algorithms at scale. However, using the testbed has stressed the system software, networking protocols, and management tools in ways that have exposed subtle but serious weaknesses that were never discovered using indoor testbeds or smaller deployments. We have been iteratively improving our support software, with the eventual aim of creating a stable hardware-software platform for sustainable, scalable, and flexible testbed deployments.

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Original article can be found at : http://www.sciencedirect.com/ Copyright Elsevier [Full text of this article is not available in the UHRA]Motivation in software engineering is recognized as a key success factor for software projects, but although there are many papers written about motivation in software engineering, the field lacks a comprehensive overview of the area. In particular, several models of motivation have been proposed, but they either rely heavily on one particular model (the job characteristics model), or are quite disparate and difficult to combine. Using the results from our previous systematic literature review (SLR), we constructed a new model of motivation in software engineering. We then compared this new model with existing models and refined it based on this comparison. This paper summarises the SLR results, presents the important existing models found in the literature and explains the development of our new model of motivation in software engineering

Context: There continues to be concern that research is not addressing the challenges that practice faces. For the benefit of academia and industry, researchers need to be aware of practitioners' challenges and their context so that relevant and applicable research is undertaken.Objective: This paper investigates two research questions: what challenges do agile practitioners face?and, how do practitioner challenges manifest themselves in an organisational setting? It aims to map the practitioner challenge landscape, explore challenge characteristics, compare findings with previous literature and identify implications for research that is relevant to practice.Method: A combination of methods was used: elicitation of practitioner challenges collected using a Challenge Wall at a series of practitioner events; organisational Case Study using interviews, document analysis and observation; and online Survey. Findings were then compared to previous publications. Results:Challenges collected from the Challenge Wall were grouped under 27 subthemes and seven themes: Claims and Limitations, Organisation, Sustainability, Culture, Teams, Scale, and Value.Investigating one challenge in the Case Study uncovered a set of new challenges, which were interrelated. Over 50% of survey respondents experienced challenges highlighted in the Case Study. Conclusion:The landscape of agile practitioner challenges is complex and intertwined. Some challenges, such as doing agile in a non-agile environment, are multi-dimensional, affect many aspects of practice, and may be experienced simultaneously as business, organisational, social and adaptation problems. Some challenges, such as understanding cultural change or measuring agile value, persist and are hard to address, while others, such as adoption, change focus over time. Some challenges, such as governance and contracts, are under-researched, while others, such as business and IT transformation, have been researched but findings have not had the expected impact. Researchers wishing to address practitioner challenges need to treat them in context rather than in isolation and improve knowledge transfer.

Quantum optical coherence tomography (QOCT) makes use of an entangled twin-photon light source to carry out axial optical sectioning. We have probed the longitudinal structure of a sample comprising multiple surfaces in a dispersion-cancelled manner while simultaneously measuring the group-velocity dispersion of the interstitial media between the reflecting surfaces. The results of the QOCT experiments are compared with those obtained from conventional optical coherence tomography (OCT). 4145-4154 (1995). 13. L. Mandel and E. Wolf, Optical Coherence and Quantum Optics (Cambridge, New York, 1995), ch. 22. 14. C. K. Hong, Z. Y. Ou, and L. Mandel, "Measurement of subpicosecond time intervals between two photons by interference," Phys. Rev. Lett. 59, 2044Lett. 59, -2046Lett. 59, (1987

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