Abstract
The rapid proliferation of human population and the growth of consumption leaded to an increase of hazardous waste. This becomes a worldwide ecological and environmental challenge. According to last available statistics the estimated global municipal solid waste reached 2.02 billion tons. Unfortunately there is not only solid waste: vegetable oil, one kind of liquid waste, used in food manufacturing, is responsible for serious contamination of water resources. Its collection is profitable by recycling into biodiesel and is already regulated in some countries. However it faces several logistic issues. Major issues are related to collection delays, which lead to oil giveaway, and reduced collection [1,2]. This paper proposes a solution to some of these logistic problems introducing a system to manage cooking oil collection in order to increase collection profits. The developed system follows a defined oil collection plan in order to optimize collection routes, introducing a sensor network that triggers collection events to a central system overcoming the current collection delays and wastes. The system is being tested in a real scenario with a Portuguese cooking oil collection company.

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The Internet and specially the Web 2.0, when combined with the organizations business processes and used in their e-business initiatives, may bring an enormous set of competitive advantages. Despite the slow pass at which the organizations are incorporating Web 2.0 in their business initiatives, these actions are still being made without following any methodology or set of guidelines, thus resulting in inconstant return of investment. With this in mind, we present a project that, by analyzing and studying several case studies, aims on achieving a methodology or a set of guidelines that allow organizations to better plan and execute their Web 2.0 business initiatives.

Abstract
The new generation of e-learning, commonly nominated e-learning 2.0 or social e-learning, aims at eliminating physical, social and cultural barriers, allowing knowledge everywhere, whether being in the workplace or being at home. This allows a growth in the motivation and likeness for learning, shortening the distances between people by the creation of learning communities that share the same tastes and interests. This article proposes a model for e-Learning 2.0 that can be implemented on a social network, and discuss its advantages by supporting the education and training throughout life and in designing new models for distance learning.

Abstract
To compete effectively in the e-business world, an organization must structurally transform its internal foundation. This structural change requires an organization to develop an innovative e-business strategy, focusing on speed to market and breakthrough execution. Despite the recognition and care that in recent years has been dedicated to e-business, there remains a need for continuing research efforts that seek to better understand constraints on the evolution of an organization to a state that can take advantage of e-business possibilities. There is a special need for this when considering small and medium enterprises, or businesses in developing countries. To minimize risk exposure from e-business initiatives, it is imperative for an organization to identify potential constraints on e-business evolution. In this setting, we develop a research model that involves e-business constraints and e-business maturity. We classify the constraints into the categories of environment constraints, organizational constraints, and technological constraints. Our results indicate that there are constraints that can be more or less problematic, depending on the stage of maturity. The results are also quite different in large organizations versus Small and Medium Enterprises.