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Even the wireless communication is considered to offer many advantages, compared to wired communication, there are still many constraints to pass over. The domain of Wireless Sensor Networks (WSN) has been researched for many years, designed, developed and optimized in many directions, but even so there are just a few real life implementations. One major obstacle remains the cost of such a network. The cost of a single node device is considered to be high, which multiplied with the total number of nodes necessary for a network, results to become very high.Since our research project supposes to design and implement a system for monitoring the indoor ambient conditions using a WSN, we have decided to construct a specific framework, including hardware and software, more suitable for our requirements, with minimum cost and having a general format. The general format will permit us to use the framework, with none or minimum modifications, for other types of monitoring applications in the future. On the hardware side the cost has been minimized by using Seeeduino Stalker v2 platform and XBee Series 2 module. This paper presents the proposed framework with its components, offering more details on the most important of them.

In this paper, we will study and describe the methods which could be used for optimizing the database and achieving the best performances. The optimizing possibilities was considered for the case of systems which user wireless sensor networks (WSN) inside the systems dedicated for monitoring the health status of the patients. Also, this kind of optimizations could be implemented and for other type of similar systems. The system was created also as an extension at Leonardo da Vinci project, VetTrend.

In this paper, we present a newsletter engine application, with which newsletters can be created and sent to different subscribers. The application permits to users to create or delete newsletter articles, to select a visual template of the newsletter's layout and to send the newsletters to its subscribers.

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