Fault rocks from the classic Rocky Mountain foreland fold-and-thrust belt in southwestern Canada were dated by Ar analysis of clay grain-size fractions. Using X-ray diffraction quantification of the detrital and authigenic component of each fraction, these determinations give ages for individual faults in the area (illite age analysis). The resulting ages cluster around 72 and 52 Ma (here calle...

Rotella, F., Shuffle product of generating series, Theoretical Computer Science 79 ( 1991) 257-261. In this note, we give a short proof of the explicit and recurrent construction of the shuffle product of two noncommutative formal power serIfis This construction is simply expressed in terms of linear matrix algebra.

Spencer, J., Ulam’s searching game with a fixed number of lies, Theoretical Computer Science 95 (1992) 3077321. Paul tries to find an unknown x from 1 to n by asking 4 Yes-No questions. In response Carole may lie up to k times. For k fixed and n, 4 sufficiently large, necessary and sufficient conditions are given for Paul to win.

Prospects for future measurements of Deeply Virtual Compton Scattering at HERMES are studied using different simple models for parameterizations of generalized parton distributions (GPDs). Measurements of the lepton charge and lepton beam helicity asymmetry will yield important input for theoretical models towards the future extraction of GPDs.

Oswin Aichholzer Institute for Theoretical Computer Science Graz University of Technology Inffeldgasse 16b, A-8010 Graz, Austria [email protected] Franz Aurenhammer Institute for Theoretical Computer Science Graz University of Technology Inffeldgasse 16b, A-8010 Graz, Austria [email protected] Hannes Krasser Institute for Theoretical Computer Science Graz University of Technology In...

The forces promoting and constraining speciation are often studied in theoretical models because the process is hard to observe, replicate, and manipulate in real organisms. Most models analyzed to date include pre-defined functions influencing fitness, leaving open the question of how speciation might proceed without these built-in determinants. To consider the process of speciation without pr...

One of the more dramatic life histories in the natural world is that characterized by a single, massive, fatal reproductive episode ('semelparity'). A wealth of increasingly sophisticated theoretical models on differential life history evolution have been produced over the last two decades. In recent years, empirical studies of the ecology of semelparous plants (and their iteroparous relatives)...

The purpose of this research is the identification of a paradigm which fixes the basic concepts and the type of logical relationships between them, whereby direct, govern and evaluate choises on new technologies. The contribution is based on the assumption that the complexity of knowledge is correlated with the complexity of the learning environment. From the existence of this correlation will ...