Jussi Ronkainen

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Agile – denoting “the quality of being agile; readiness for motion; nimbleness, activity, dexterity in motion” – software development methods are attempting to offer an answer to the eager business community asking for lighter weight along with faster and nimbler software development processes. This is especially the case with the rapidly growing and(More)
Agile software development methods have caught the attention of software engineers and researchers worldwide. Scientific research is yet scarce. This paper reports results from a study, which aims to organize, analyze and make sense out of the dispersed field of agile software development methods. The comparative analysis is performed using the method's(More)
Agile software development methods have been suggested as useful in many situations and contexts. However, only few (if any) exp eriences are available regarding the use of agile methods in embedded domain where the hardware sets tight requirements for the software. This development domain is arguably far away from the agile home ground. This paper explores(More)
Modern society is facing great challenges due to pollution and increased carbon dioxide (CO2) emissions. As part of solving these challenges, the use of renewable energy sources and electric vehicles (EVs) is rapidly increasing. However, increased dynamics have triggered problems in balancing energy supply and consumption demand in the power systems. The(More)
O. S. Kirsebom,1,* S. Hyldegaard,1 M. Alcorta,2,† M. J. G. Borge,2 J. Büscher,3 T. Eronen,4 S. Fox,5 B. R. Fulton,5 H. O. U. Fynbo,1 H. Hultgren,6 A. Jokinen,4 B. Jonson,6 A. Kankainen,4 P. Karvonen,4 T. Kessler,4,‡ A. Laird,5 M. Madurga,2,§ I. Moore,4 G. Nyman,6 H. Penttilä,4 S. Rahaman,4,‖ M. Reponen,4 K. Riisager,1 T. Roger,3 J. Ronkainen,4,¶ A.(More)
A variety of scientific disciplines makes use of radioactive isotopes in the form of a low-energy ion beam or an ion or atom cloud in a trap. As in-flight radioactive ion beam facilities produce and select isotopes at high energy, ion catcher techniques to transform high-energy ions into low-energy ones are essential. The extremely high ion energies at(More)
The β feeding probability of (102,104,105,106,107)Tc, 105Mo, and 101Nb nuclei, which are important contributors to the decay heat in nuclear reactors, has been measured using the total absorption technique. We have coupled for the first time a total absorption spectrometer to a Penning trap in order to obtain sources of very high isobaric purity. Our(More)