What is wrong with ad hoc hypotheses? Ever since Popper’s falsificationist account of adhocness, there has been a lively philosophical discussion about what constitutes adhocness in scientific explanation, and what, if anything, distinguishes legitimate auxiliary hypotheses from illicit ad hoc ones. This paper draws upon distinct examples from pseudoscience to provide us with a clearer view as to what is troubling about ad hoc hypotheses. In contrast with other philosophical proposals, our approach retains the colloquial, derogative meaning of adhocness, and (...) calls attention to the way in which the context of a theoretical move bears on the charge of adhocness. We also discuss the role of motivations implicit in the concept of adhocness, and the way ad hoc moves draw on theory-internal rationalizations. (shrink)

In the debate about Composition as Identity (CI), a recurring pattern is to ask whether a certain feature of identity is also instantiated by composition. This recurring pattern is followed when, for example, the question is asked whether a whole and its parts are indiscernible. In following this pattern, it is methodologically desirable to assume the most standard account of the philosophical problems at stake. However, when the necessity of identity and the problem whether composition is as necessary as identity (...) are at stake, the literature about CI often violates this methodological principle, and resorts to non-standard views about modality, such as counterpart theory. In this paper, we purport to remedy this anomaly and to assess CI on the background of a standard, broadly Kripkean view of modality, and in particular of the contention that a single entity exists in more than one possible world. Given this contention, the backer of CI is forced to relativize composition and, as a consequence, identity to possible worlds, thereby introducing a non-standard kind of identity. We will discuss the charge of adhocness which might be raised against the resulting variety of CI. (shrink)

Create a novel network model for mobile ad hoc network (MANET) nodes and actors in wireless sensor networks to collaborate on event processing. There are two stages in the development of distributed algorithms: setup and negotiation. The first uses weighted proportional max-min fairness to initially allocate MANET nodes across event zones, whereas the latter uses a market-based method to re-distribute the number of MANET nodes based on existing and new events. A detection technique for malicious packet dropping attacks in MANETs. (...) The mechanism of the suggested approach is Collaborative Convolutional Neural Network (CCNN), which is based on the reputation value computed for that node by its neighbours. A node's reputation value is determined by its network packet forwarding behaviour. The reputation information is collected, saved, and transferred between nodes before being calculated under various scenarios. A network simulator was used to test the proposed protocol. The simulation results demonstrate the effectiveness of its performance. Even in the presence of cryptographic procedures, our method incurs negligible network bandwidth and latency costs. Moreover, we demonstrate that the protection is still effective in the presence of misbehaving nodes and routing changes caused by mobility. While further research is needed to thoroughly evaluate our method, we feel that the concept of collaborative security in MANETs is a potential future area. (shrink)