A g ile methodolo gy lacks in usabilit y and most of the time issues like usability do not lead the software toward success. User-Centered Design supports usability and according to UCD, the client should be a part of the process from planning to handover phase. Integration of these two areas is a difficult and challenging task w.r.t its applicability for collocated and distributed level. This research focuses on Agile and UCD integration, providing a few practices and artifacts to guide designer's and Agile teams to overcome the challenges. How UCD techniques can support Agile in order to deal with usability issues. In this paper, we have demonstrated that which are the levels and phases where stakeholders, especiall y the user involvement and interaction are required. Case study and observation method have been followed. The result of this research is a framework.
Wireless sensor networks are envisioned to play a very important role in the Internet of Things in near future and therefore the challenges associated with wireless sensor networks have attracted researchers from all around the globe. A common issue which is well studied is how to restore network connectivity in case of failure of single or multiple nodes. Energy being a scarce resource in sensor networks drives all the proposed solutions to connectivity restoration to be energy efficient. In this paper we introduce an intelligent on-demand connectivity restoration technique for wireless sensor networks to address the connectivity restoration problem, where nodes utilize their transmission range to ensure the connectivity and the replacement of failed nodes with their redundant nodes. The proposed technique helps us to keep track of system topology and can respond to node failures effectively. Thus our system can better handle the issue of node failure by introducing less overhead on sensor node, more efficient energy utilization, better coverage, and connectivity without moving the sensor nodes.
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