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J. Ekman [3]Joakim Ekman [1]James M. Ekman [1]Jan Ekman [1]
  1. Joakim Ekman & Erik Amnå (2012). Political Participation and Civic Engagement: Towards a New Typology. Human Affairs 22 (3):283-300.
    Reviewing the literature on political participation and civic engagement, the article offers a critical examination of different conceptual frameworks. Drawing on previous definitions and operationalisations, a new typology for political participation and civic engagement is developed, highlighting the multidimensionality of both concepts. In particular, it makes a clear distinction between manifest “political participation” and less direct or “latent” forms of participation, conceptualized here as “civic engagement” and “social involvement”. The article argues that the notion of “latent” forms of participation is (...)
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  2. D. Rudolph, L. -L. Andersson, R. Bengtsson, J. Ekman, O. Erten, C. Fahlander, E. K. Johansson, I. Ragnarsson, C. Andreoiu, M. A. Bentley, M. P. Carpenter, R. J. Charity, R. M. Clark, P. Fallon, A. O. Macchiavelli, W. Reviol, D. G. Sarantites, D. Seweryniak, C. E. Svensson & S. J. Williams, Isospin and Deformation Studies in the Odd-Odd N = Z Nucleus Co-54.
    High-spin states in the odd-odd N = Z nucleus Co-54 have been investigated by the fusion-evaporation reaction Si-28(S-32,1 alpha 1p1n)Co-54. Gamma-ray information gathered with the Ge detector array Gammasphere was correlated with evaporated particles detected in the charged particle detector system Microball and a 1 pi neutron detector array. A significantly extended excitation scheme of Co-54 is presented, which includes a candidate for the isospin T = 1, 6(+) state of the 1f(7/2)(-2) multiplet. The results are compared to large-scale shell-model (...)
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  3. D. Rudolph, I. Ragnarsson, W. Reviol, C. Andreoiu, M. A. Bentley, M. P. Carpenter, R. J. Charity, R. M. Clark, M. Cromaz, J. Ekman, C. Fahlander, P. Fallon, E. Ideguchi, A. O. Macchiavelli, M. N. Mineva, D. G. Sarantites, D. Seweryniak & S. J. Williams, Rotational Bands in the Semi-Magic Nucleus Ni-57(28)29.
    Two rotational bands have been identified and characterized in the proton-magic N = Z + 1 nucleus Ni-57. These bands complete the systematics of well-and superdeformed rotational bands in the light nickel isotopes starting from doubly magic Ni-56 to Ni-60. High-spin states in Ni-57 have been produced in the fusion-evaporation reaction Si-28(S-32, 2p1n)Ni-57 and studied with the gamma-ray detection array GAMMASPHERE operated in conjunction with detectors for evaporated light charged particles and neutrons. The features of the rotational bands in Ni-57 (...)
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  4. N. J. Welton, A. I. Houston, J. Ekman & J. M. McNamara (2002). A Dynamic Model of Hypothermia as an Adaptive Response by Small Birds to Winter Conditions. Acta Biotheoretica 50 (1):39-56.
    We present a dynamic programming model which is used to investigate hypothermia as an adaptive response by small passerine birds in winter. The model predicts that there is a threshold function of reserves during the night, below which it is optimal to enter hypothermia, and above which it is optimal to rest. This threshold function decreases during the night, with a particularly sharp drop at the end of the night, representing the time and energy costs associated with returning to normal (...)
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  5. Jan Ekman (1998). Propositions in Prepositional Logic Provable Only by Indirect Proofs. Mathematical Logic Quarterly 44 (1):69-91.
    In this paper it is shown that addition of certain reductions to the standard cut removing reductions of deductions in prepositional logic makes prepositional logic non-normalizable. From this follows that some provable propositions in prepositional logic has no direct proof.
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  6. H. Andrew Michener, James M. Ekman & David C. Dettman (1986). Predictive Superiority of the Beta-Characteristic Function in Cooperative Non-Sidepayment N-Person Games. Theory and Decision 21 (2):99-128.
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