Actor-network theory, which is considered as a development of socio-technical structuralism school, observes reservation and stability of networks containing personal and impersonal components such as individuals, organizations, communication software and hardware, and infrastructural standards by examination of socio-technical dimensions concurrently.The goal of this research is studying the i...

A Sensor Web is a system of intra-communicating spatially distributed sensor pods that can be deployed to monitor and explore new environments. By its very nature, the Sensor Web provides spatio-temporal data in a form consistent with that needed for environment modeling and represents a new paradigm for in situ monitoring and exploration. For example, a wireless web of scattered sensor pods on...

Short Summary (in English) 66 Short Summary (in Hungarian) 67 ii Acknowledgements First of all, I would like to express my thanks to my supervisor András L®rincz for the continuous support and trust. I'm deeply indebted to the members of his research group for the friendly atmosphere and for their readiness to help. Namely, to Zoltán Bárdosi, István Szita and Bálint Takács. I'm especially grate...

This paper deals with the old and classical problem of determining necessary conditions for the overconstrained mobility of some mechanical device. Methods from algebraic geometry have already been used to investigate these mobility conditions, and we propose some tools specifically developed for the so–called n–pods. In particular, we focus on the conditions which are imposed on an n–pod by th...

We study the problem of releasing k-way marginals of a database D ∈ ({0, 1}), while preserving differential privacy. The answer to a k-way marginal query is the fraction of D’s records x ∈ {0, 1} with a given value in each of a given set of up to k columns. Marginal queries enable a rich class of statistical analyses of a dataset, and designing efficient algorithms for privately releasing margi...