When I entered graduate school in 1984, there was scant serious work in history or philosophy of the modern earth sciences. Excellent scholars had written on Darwin, Lyell and nineteenth century geology, and some of that work heeded earth science qua earth science, but much of it attended to geology only as something that helped to lay the groundwork for an advance in biology: Darwin’s theory o...

hysteresis has been widely recognized in the soil water relationship. in this paper, a detailed review of hysteresis was performed in relation to its models. so far, different models have been suggested to describe hysteresis in the water retention curve (wrc) that could be categorized into two main groups: conceptual and empirical models. the models in the first group are based on the domain t...

Mining of frequent traversal paths in web logs is an application of sequence mining and useful with many applications that include web recommendation, caching, pre-fetching etc. Most of the existing algorithms follow a bottom-up approach to mine sequence patterns in a database. In this paper, a fast top-down algorithm is presented to discover maximal traversal paths which are contiguous sequenc...