Nowadays, data handled by an institution or company is spread out by more than one database and lots of documents of different types. To extract the information implicit in that data, it is necessary to pick parts from those various archives. To obtain a general overview, those information slices should be gather. Different approaches can be followed to achieve that integration, ranging from th...

Given a 3-manifold M , there are generically infinitely many manifold which covers M . However, if we are restricted to the category of knot complements, the situation is quite different. It can be shown (see Lemma 1 and bellow) that if the complement E(K) of a knot K is n-fold covered by some knot complement, then the covering is cyclic, and K admits a cyclic surgery, i.e. a Dehn surgery such ...

mixed clayey soils occur as mixtures of sand (or gravel) and clay in widely varying proportions. their engineering behavior has not been comprehensively studied yet. an experimental program, comprising monotonic, cyclic, and post-cyclic triaxial tests was undertaken on compacted clay-granular material mixtures, having different proportions of clay and sand or gravel. this paper presents the res...

This paper describes the digitization and utilization of Complete Map of Peking, Qianlong Period, which is the oldest measured map of Beijing made about 250 years ago. We first proposed the geometric correction method called “linepreserving distance weighting method” to preserve linear features relevant in the old map of cities. Next we improved the reliability of the old map as information inf...

In E-Learning, the selection of the pedagogical contents to teach and the organization of this content are two principal operations during the design of a course. The growth and the diversity of the informational resources used generate problems of diffusion, access, of classification and management. With the MEMORAe project, we deal with these problems and propose to answer them by using an on...

Bing Han1,2,3, Karsten Köhler2, Kerstin Jungnickel3, Robert Mettin2, Werner Lauterborn2 and Alfred Vogel3,† 1Laser–Material Interaction Lab, Advanced Launching Co-innovation Center, Nanjing University of Science and Technology, #200 Xiao Ling Wei, 210094 Nanjing, Jiangsu, PR China 2Christian Doppler Laboratory on Cavitation and Micro Erosion, Drittes Physikalisches Institut, Universität Götting...

This paper explores the idea of using contexts to support more efficient information search in Topic Maps-based digital libraries. The notion of context is perceived as abstraction of grouping of domain concepts and resources based on the existing semantic relationships between them. The proposed model of context is used for context representation in the TM4L environment.

Demands to make education flexible and active call for a comprehensive restructuring of the traditional university course format. We show how such restructuring can be done in a natural and coherent way by combining e-learning with Polyscopic Topic Maps, an information structuring method which is being developed by the authors. We describe a university course model called Flexplearn which is ba...

A chemical reaction is a process of transforming one set of molecules (educts) into another set (products). In the course of a reaction, chemical bonds which hold the atoms together are redistributed, so that each atom in a reaction educt appears in a specific position of a reaction product. Tracing atoms between educts and products refers to a non-trivial problem in computational chemistry and...

For maps equivariant under the action of a nite group ? on R n , the possible symmetries of xed points are known and correspond to the isotropy subgroups. This paper investigates the possible symmetries of arbitrary, possibly chaotic, attractors and nds that the necessary conditions of Melbourne, Dellnitz and Golubitsky 15] are also suucient, at least for continuous maps. The result shows that ...