77 research outputs found
Semantic categories underlying the meaning of āplaceā
This paper analyses the semantics of natural language expressions that are associated with the intuitive notion of āplaceā. We note that the nature of such terms is highly contested, and suggest that this arises from two main considerations: 1) there are a number of logically
distinct categories of place expression, which are not always clearly distinguished in discourse about āplaceā; 2) the many non-substantive place count nouns (such as āplaceā, āregionā, āareaā, etc.) employed in natural
language are highly ambiguous. With respect to consideration 1), we propose that place-related expressions
should be classified into the following distinct logical types: a) āplace-likeā count nouns (further subdivided into abstract, spatial and substantive varieties), b) proper names of āplace-likeā objects, c) locative property phrases, and d) definite descriptions of āplace-likeā objects. We outline possible formal representations for each of these. To address consideration 2), we examine meanings, connotations and ambiguities of the English vocabulary of abstract and generic place count nouns, and identify underlying elements of meaning, which explain both
similarities and differences in the sense and usage of the various terms
Measurement, Collaborative Learning and Research for Sustainable Use of Ecosystem Services: Landscape Concepts and Europe as Laboratory
Structure and heterogeneity of gliadin: A hydrodynamic evaluation
A study of the heterogeneity and conformation in solution [in 70% (v/v) aq. ethanol] of gliadin proteins from wheat was undertaken based upon sedimentation velocity in the analytical ultracentrifuge, analysis of the distribution coefficients and ellipsoidal axial ratios assuming quasi-rigid particles, allowing for a range of plausible time-averaged hydration values. All classical fractions (ĆĀ±, ĆĀ³, Ćā°slow, Ćā°fast) show three clearly resolved components. Based on the weight-average sedimentation coefficient for each fraction and a weight-average molecular weight from sedimentation equilibrium and/or cDNA sequence analysis, all the proteins are extended molecules with axial ratios ranging from ~10 to 30 with ĆĀ± appearing the most extended and ĆĀ³ the least. ĆĀ© 2009 European Biophysical Societies' Association
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