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Not all research leads to fruitful results; trying new ways or methods may surpass state of the art, but sometimes the hypothesis is not proven, the improvement is insignificant, or the system fails because of a design error done years ago in previous works. In a systems discipline like pervasive computing, there are many sources of errors, from hardware issues over communication channels to heterogeneous software environments. However, failure to succeed is not a failure to progress. It is essential to create platforms for sharing insights, experiences, and lessons learned when conducting research in pervasive computing so that the same mistakes are not repeated. And sometimes, a problem is a symptom of discovering new research challenges. Based on the collective input of the First International Workshop on Negative Results in Pervasive Computing (PerFail 2022), co-located with the 20th International Conference on Pervasive Computing and Communications (PerCom 2022), this article presents a comprehensive discussion on perspectives on publishing negative results, useful failures, and lessons learned in pervasive computing.

—This work presents the proficiency in writing C code using Code::Blocks. Code::Blocks is a free C, C++ and Fortran IDE built to meet the most demanding needs of its users. It runs on Linux, Mac, Windows (uses wxWidgets). It is designed to be very extensible and fully configurable. Code::Blocks is used to program hybrid converter topology which can supply simultaneous dc and ac loads from a single dc sources like battery, photovoltaic cells, fuel cells etc. This topology is realized by replacing the controlled switched of single-switch boost converter with a voltage-sourceinverter bridge network. The resulting hybrid converter requires lesser number of switches to provide dc and ac output with an increased reliability, resulting from its inherent shoot-through in the inverter bridge. Such multi output converter with better power processing density and reliability can be well suited for system with simultaneous dc and ac loads. This converter is called Boost derived hybrid converter (BDHC). As it is obtained from the conventional boost topology. The study state behaviour of this BDHC will is presented. And also a suitable pulse width modulation (PWM) controlled strategy will be adapted based upon unipolar sine PWM. Simulation of BDHC is carried out. The BDHC converter is able to supply dc and ac loads from a 12V dc input.The programming results are ploted using Gnuplot. Gnuplot is a free, command- driven, interactive, function and data plotting program.