Role of women in the development of science and technology in the Third World : an IDRC perspective

Meeting: Third World Academy of Sciences, Conference, 2-8 Oct. 1988, Trieste, I

National information policies : are they possible to formulate?

Also published in Empowering communities in the information society. Halfway House, Development Bank of Southern Africa, 1996, p. 49-5

Whither librarians?

Meeting: Canadian Library Association (CLA), Annual Conference, June 1995, Calgary, AB, C

Assessment indicators and the impact of information on development : keynote address presented at the 1993 CAIS / ACSI Conference

Meeting: CAIS / ACSI Annual Conference, 21st, 11-14 July 1993, Antigonish, NS, CAMeeting: Canadian Association for Information Science, Annual Conference, 21st, 11-14 July 1993, Antigonish, NS, C

Information technologies and their application to data management

Meeting: Pacem in Maribus, 16th, 23 Aug. 1988, Halifax, N.S., C

Documentation for development : a view from the North; keynote address

Meeting: European Association of Development Research and Training Institutes Working Group on Information and Documentation Seminar on Strengthening Cooperation in Documentation for Development, 3-6 Sept. 1991, Paris, F

A Special Kinship

Lutheran Hour Ministries enjoys a kinship with Concordia Seminary historically as well as today

The rate of metastable vacuum decay in (2+1) dimensions

The pre-exponential factor in the probability of decay of a metastable vacuum is calculated for a generic (2+1) dimensional model in the limit of small difference $\epsilon$ of the energy density between the metastable and the stable vacua. It is shown that this factor is proportional to $\epsilon^{-7/3}$ and that the power does not depend on details of the underlying field theory. The calculation is done by using the effective Lagrangian method for the relevant soft (Goldstone) degrees of freedom in the problem. Unlike in the (1+1) dimensional case, where the decay rate is completely determined by the parameters of the effective Lagrangian and is thus insensitive to the specific details of the underlying (microscopic) theory, in the considered here (2+1) dimensional case the pre-exponential factor is found up to a constant, which does depend on specifics of the underlying short-distance dynamics, but does not depend on the energy asymmetry parameter $\epsilon$. Thus the functional dependence of the decay rate on $\epsilon$ is universally determined in the considered limit of small $\epsilon$.Comment: 10 page

Role of the International Development Research Centre (IDRC) in international information programs

Meeting: Seminar on International Information Programs : Canadian and Quebec Participation, 20 June 1986, Québec, QC, C

Unconventional Hund Metal in a Weak Itinerant Ferromagnet

The physics of weak itinerant ferromagnets is challenging due to their small magnetic moments and the ambiguous role of local interactions governing their electronic properties, many of which violate Fermi-liquid theory. While magnetic fluctuations play an important role in the materials’ unusual electronic states, the nature of these fluctuations and the paradigms through which they arise remain debated. Here we use inelastic neutron scattering to study magnetic fluctuations in the canonical weak itinerant ferromagnet MnSi. Data reveal that short-wavelength magnons continue to propagate until a mode crossing predicted for strongly interacting quasiparticles is reached, and the local susceptibility peaks at a coherence energy predicted for a correlated Hund metal by first-principles many-body theory. Scattering between electrons and orbital and spin fluctuations in MnSi can be understood at the local level to generate its non-Fermi liquid character. These results provide crucial insight into the role of interorbital Hund’s exchange within the broader class of enigmatic multiband itinerant, weak ferromagnets