classes Generalizing classes that have no instance of their own. May or may not be modeled. Association vs aggregation Inconsistency in distinguishing association from aggregation. Association with classes that have part–whole relationship Inconsistency in associating a third party class either to the whole or to the part class. Table 2 Ontology-based modeling rules used in the study No. Rule V...

Enterprise search technology retrieves digital objects and internally generated content within organizations. Unlike other retrieval environments, enterprise search is a community of practice which responds to expected activity at similar times. Collective mind theory (Weick & Roberts, 2003) is similar to retrieval environments where the unplanned movements of multiple people move towards a sim...

ÐThe crystal chemistry of molecular complexes of several trigonal donor molecules with the trigonal acceptor 1,3,5trinitrobenzene, TNB, is reported. Generally, replacement of a moiety by another of similar shape and size does not change the overall packing. The 1:1:1 (triphenylisocyanurate) ́(TNB) ́(benzene) solvate is isostructural to the corresponding 1:1:1 thiophene solvate, con®rming the so-c...

The microstructure of a Co38Ni33Al29 FSMA was determined by conventional transmission electron microscopy, electron diffraction studies together with advanced microscopy techniques and in-situ Lorentz microscopy. 10 to 60 nm sized rod-like precipitates of hcp ǫ-Co were confirmed to be present by HRTEM. The orientation relationship between the precipitates and B2 matrix is described by the Burge...

We carry out first-principles density-functional calculations of the antiferrodistortive ~AFD! and ferroelectric ~FE! soft-mode instabilities in tetragonal SrTiO3, with the structural degrees of freedom treated in a classical, zero-temperature framework. In particular, we use frozen-phonon calculations to make a careful study of the anisotropy of the AFD and FE mode frequencies in the tetragona...

Software inspections are important for finding defects in software products (Fagan 1976, Gilb 1993, Humphrey 1995, Strauss & Ebenau 1994). A typical inspection includes two stages: individual preparation followed by a group review with roles assigned to each reviewer. Research has shown that group tasks typically result in process loss (Lorge et al 1958, Steiner 1972). In software defect detect...

The phase diagram for the YTaO4-ZrO2 quasi-binary has been determined up to 1600 °C. There are three distinct compositional regimes: an extensive YTaO4 solid solution, an extensive ZrO2 solid solution and a two-phase intermediate region. The addition of ZrO2 to YTaO4 decreases the M–T transition temperature almost linearly from 1426 °C to approximately 450 °C at the solubility limit (∼28mol% Zr...

The ESR spectra of Cu(sal)2 • 4H 20, Cu(sal)2(2-pycar)2 and Cu(sal)2(3-pycar)2 (sal = salicylate ion; pycar = pyridinemethanol) at 77 К were stud­ ied. The spin Hamiltonian parameters indicate that the unpaired electron is in the antibonding y/b]g molecular orbital. The ESR spectra of pentacoordinated Cu(II) complexes of the [Cu(phen)2X]C104 (phen = 1,10-phenanthroline; X = CI, Br) exhibit axia...

In the polymeric title compound, {[La(2)(C(7)H(3)NO(4))(2)(C(2)O(4))(H(2)O)(6)]·H(2)O}(n), the La(3+) cation is nine-coordinated in a distorted LaNO(8) tricapped trigonal-prismatic geometry formed by three pyridinedicarboxylate anions, one oxalate anion and three water mol-ecules. The oxalate anion is located on an inversion center. The oxalate and pyridine-dicarboxyl-ate anions bridge the La(3...

Z. Naturforsch. 42b, 573-578 (1987); eingegangen am 8. Januar 1987 Phosphinetetracarbonyliron, Phosphitetetracarbonyliron, IR Spectra, P NMR Spectra, Fe Mössbauer Spectra A series of trigonal bipyramidal Fe(CO)4L complexes has been prepared and characterized by infrared, Fe Mössbauer and P NMR spectroscopy. A linear correlation, with a negative slope, between the CO stretching frequencies and t...