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61.
Mark Hoogendoorn Catholijn M. Jonker Martijn C. Schut Jan Treur 《Computational & Mathematical Organization Theory》2007,13(2):147-184
Organizations change with the dynamics of the world. To enable organizations to change, certain structures and capabilities are needed. As all processes, a change process has an organization of its own. In this paper it is shown how within a formal organization modeling approach also organizational change processes can be modeled. A generic organization model (covering both organization structure and behavior) for organizational change is presented and formally evaluated for a case study. This model takes into account different phases in a change process considered in Organization Theory literature, such as unfreezing, movement and refreezing. Moreover, at the level of individuals, the internal beliefs and their changes are incorporated in the model. In addition, an internal mental model for (reflective) reasoning about expected role behavior is included in the organization model. 相似文献
62.
We describe how to transform an asymmetric traveling salesman problem into a symmetric one at the cost of almost doubled problem size. Use and consequences are discussed shortly. 相似文献
63.
Coplanar and noncoplanar differential cross sections of the reaction H(d, pp)n were measured in kinematically complete experiments. The two-dimensional spectra were accumulated off-line in an alternative way, which enabled us to eliminate the distortion due to the finite geometry. The data were compared with the charge-dependent Ebenhöh code using two S-wave rank-one separable potentials. The theory predicts the shape of the cross sections reasonably well. Deviations of 20 % occur in the absolute scale especially in the final state region. Codes that account approximately for the Coulomb interaction fit the data better only in the region with low relative p-p energy. 相似文献
64.
Stroud RM Hanbicki AT Park YD Kioseoglou G Petukhov AG Jonker BT Itskos G Petrou A 《Physical review letters》2002,89(16):166602
We report the first experimental demonstration that interface microstructure limits diffusive electrical spin-injection efficiency across heteroepitaxial interfaces. An inverse correlation be-tween spin-polarized electron injection efficiency and interface defect density is demonstrated for ZnMnSe/AlGaAs-GaAs spin-polarized light-emitting diodes that exhibit quantum well spin polarizations up to 85%. A theoretical treatment shows that the suppression of spin injection due to interface defects results from the contribution of the defect potential to the spin-orbit interaction, which increases the spin-flip scattering. 相似文献
65.
A method was developed to determine 4-hexylresorcinol in shrimp meat. The procedure is based on extraction of test portions with methanol followed by liquid chromatographic analysis of the extracts, using a reversed-phase column and fluorimetric detection (excitation: 280 nm, and emission: 310 nm). The confidence interval of the recovery in working range of 1.5-2.5 mg/kg was 81.6 +/- 0.8%. The relative standard deviation in the working range was 2.1%. Limits of quantitation and detection were 6.59 and 1.98 ng/mL extract, respectively, corresponding to 0.26 and 0.08 mg/kg in shrimp. 相似文献
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F. Bergsma J. Dorenbosch M. Jonker C. Nieuwenhuis J. V. Allaby U. Amaldi G. Barbiellini L. Barone A. Capone W. Flegel L. Lanceri M. Metcalf J. Panman R. Plunkett C. Santoni K. Winter I. Abt J. Aspiazu F. W. Büsser H. Daumann P. D. Gall T. Hebbeker F. Niebergall P. Schütt P. Stähelin V. Gemanov P. Gorbunov E. Grigoriev V. Kaftanov V. Khovansky A. Rosanov A. Baroncelli R. Biancastelli B. Borgia C. Bosio M. Diemoz U. Dore F. Ferroni E. Longo L. Luminari P. Monacelli F. de Notaristefani L. Tortora V. Valente CHARM Collaboration 《Zeitschrift fur Physik C Particles and Fields》1984,24(3):217-218
A search for fractionally chargedQ=1/3 (2/3) particles of different properties of interaction produced in (anti)neutrino-nucleus and in protonnucleus collisions was performed using the scintillator system of the CHARM neutrino detector at the CERN SPS. No events of the cases considered were found. In (anti)neutrino beams production was found to be less than a few times 10?5 per interaction of a beam particle. In a proton beam an upper limit on the production cross section of ~10?40 cm2 was obtained. 相似文献
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