69 research outputs found

    Comment on "Quantum diffusion of 3-He impurities in solid 4- He"

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    In this comment I show that the experimental data on quantum diffusion of 3-He impurities in solid 4-He can be explained using the adopted quasiparticle theory. The contention by E.G. Kisvarsanyi and N.S. Sullivan (KS) in Phys.Rev.B v. 48, 16557 (1993) as well as in their Reply (ibid. v. 55, 3989 (1997)) to the Grigor'ev's Comment (Phys.Rev. B v. 55, 3987 (1997)) that "Pushkarov's theory of phonon scattering fails to fit the data by very large factors" is groundless and may result from their bad arithmetical error. This means that the phonon-impurity scattering mechanism of diffusion is consistent with experiment and its neglecting by KS makes their results questionable.Comment: RevTex, 5 pages, no figures, to be published in Phys.Rev.

    The Physics of the B Factories

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    Goal setting in family firms:goal diversity, social interactions, and collective commitment to family-centered goals

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    Goal setting in family firms is very complex due to the interplay between family and business systems. However, this topic is largely overlooked in family business research. In this qualitative study of goals and goal formulation processes among 76 organizational members across 19 family firms, we identify goal diversity as a direct consequence of the overlap between the family, ownership, and business systems. We found that goal diversity is expressed more strongly in the proximity of generational transitions, triggering social interaction processes through which organizational members contrast their goals. Our findings suggest that different types of social interactions lead to different behaviors, with familial social interactions being more effective than professional social interactions in managing goal diversity toward the formation of collective commitment to family-centered goals

    The directors; their duties, obligations and powers

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    Company law, corporate governance, and the company secretary

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    Board committees and board evaluations

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    The directors; their duties, obligations and powers

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