Enabling agile web development through in-browser code generation and evaluation

Rapid evolution and flexibility are the key of modern web application development. Rapid Prototyping approaches try to facilitate evolution by reducing the time between the elicitation of a new requirement and the evaluation of a prototype by both developers and customers. Software generation, with disciplines such as Software Product Lines Engineering or Model Driven Engineering, favours the required flexibility for the development process. Nevertheless, each small change in the design of an application requires a full redeployment of complex environments in order to allow customers to test and evaluate the new configuration. In this work we present an approach that improves the development process reducing the complexity of deploying evaluation prototypes and enabling an agile development cycle. The approach can be applied using software generation and it is based on in-browser generation and evaluation. We also describe two real world tools that have integrated the proposed approach in their development cycle

Testing in a DevOps Era: Perceptions of Testers in Norwegian Organisations.

To better understand the challenges encountered by testers in DevOps development, we have performed an empirical investigation of what are the trends and challenges for the testers in the DevOps environment. We have discussed the quality assurance in the difference focus areas of DevOps: Social Aspects, automation, leanness, sharing, measurement. The results were then themed in five different topics of concern to testers: collaboration, roles and responsibilities, types of tests, automation and monitoring and infrastructure. In Testing, there has been a change on the roles and responsibilities of testers, where there is much more focus on the responsibilities for testing across the teams, instead of a sole responsibility of the tester. Testers are also forced to collaborate more with other stake- holders as operations and business. Testing is brought to another level of automation in DevOps but there is still need for manual tests, that have to be much more risk-based than before. And finally, testing transparency is a must in this process and should involve not only development team but also operations and customers. This paper contributes to the body of knowledge on what are the areas we need to focus for improvement in testing for the DevOps environment. This paper also contributes to practitioners to improve their testing focusing on specific areas that needs attention.acceptedVersio

Major results from the first plasma campaign of the Wendelstein 7-X stellarator

\u3cp\u3eAfter completing the main construction phase of Wendelstein 7-X (W7-X) and successfully commissioning the device, first plasma operation started at the end of 2015. Integral commissioning of plasma start-up and operation using electron cyclotron resonance heating (ECRH) and an extensive set of plasma diagnostics have been completed, allowing initial physics studies during the first operational campaign. Both in helium and hydrogen, plasma breakdown was easily achieved. Gaining experience with plasma vessel conditioning, discharge lengths could be extended gradually. Eventually, discharges lasted up to 6 s, reaching an injected energy of 4 MJ, which is twice the limit originally agreed for the limiter configuration employed during the first operational campaign. At power levels of 4 MW central electron densities reached 3 10\u3csup\u3e19\u3c/sup\u3e m\u3csup\u3e-3\u3c/sup\u3e, central electron temperatures reached values of 7 keV and ion temperatures reached just above 2 keV. Important physics studies during this first operational phase include a first assessment of power balance and energy confinement, ECRH power deposition experiments, 2nd harmonic O-mode ECRH using multi-pass absorption, and current drive experiments using electron cyclotron current drive. As in many plasma discharges the electron temperature exceeds the ion temperature significantly, these plasmas are governed by core electron root confinement showing a strong positive electric field in the plasma centre.\u3c/p\u3