Imbedding Christian Values in the Public Education Setting: Creating a Democratic Classroom Environment

This article supports the need for Christian education in the sustainment of democracy and discusses the opportunity for Christian values to be implicitly imbedded into classroom through the creation of a democratic forum. This nation was founded on Christian principles. While the basis of today’s public education setting includes a basic understanding of the core skills (reading, writing and basic arithmetic), these skills alone are not enough for a student to achieve success. A student must also learn, through the education and spiritual process, courage, confidence and life skills in order to survive in today’s society. Furthermore, the ability to apply the core skills is necessary in order for an individual to fully achieve his or her potential. Through education and spirituality, an individual undergoes a transformation, gaining an understanding and appreciation of the world

Black Holes and Galactic Density Cusps Spherically Symmetric Anisotropic Cusps

Aims: In this paper we study density cusps that may contain central black holes. The actual co-eval self-similar growth would not distinguish between the central object and the surroundings. Methods: To study the environment of a growing black hole we seek descriptions of steady `cusps' that may contain a black hole and that retain at least a memory of self-similarity. We refer to the environment in brief as the `bulge' and on smaller scales, the `halo'. Results: We find simple descriptions of the simulations of collisionless matter by comparing predicted densities, velocity dispersions and distribution functions with the simulations. In some cases central point masses may be included by iteration. We emphasize that the co-eval self-similar growth allows an explanation of the black hole bulge mass correlation between approximately similar collisionless systems. Conclusions: We have derived our results from first principles assuming adiabatic self-similarity and either self-similar virialisation or normal steady virialisation. We conclude that distribution functions that retain a memory of self-similar evolution provide an understanding of collisionless systems. The implied energy relaxation of the collisionless matter is due to the time dependence. Phase mixing relaxation may be enhanced by clump-clump interactions.Comment: 9 pp, 3 figs, accepted by A\&

Nature and Nurture in Dark Matter Halos

Cosmological simulations consistently predict specific properties of dark matter halos, but these have not yet led to a physical understanding that is generally accepted. This is especially true for the central regions of these structures. Recently two major themes have emerged. In one, the dark matter halo is primarily a result of the sequential accretion of primordial structure (ie `Nature'); while in the other, dynamical relaxation (ie `Nurture') dominates at least in the central regions. Some relaxation is however required in either mechanism. In this paper we accept the recently established scale-free sub-structure of halos as an essential part of both mechanisms. Consequently; a simple model for the central relaxation based on a self-similar cascade of tidal interactions, is contrasted with a model based on the accretion of adiabatically self-similar, primordial structure. We conclude that a weak form of this relaxation is present in the simulations, but that is normally described as the radial orbit instability.Comment: 25 pages, 3 figures, fig with parts 1 to d, fig 3 with parts a to

Black holes and Galactic density cusps -- I. Radial orbit cusps and bulges

In this paper, we study the distribution functions that arise naturally during self-similar radial infall of collisionless matter. Such matter may be thought of either as stars or as dark matter particles. If a rigorous steady state is assumed, then the system is infinite and is described by a universal distribution function given the self-similar index. The steady logarithmic potential case is exceptional and yields the familiar Gaussian for an infinite system with an inverse-square density profile. We show subsequently that for time-dependent radial self-similar infall, the logarithmic case is accurately described by the Fridmann and Polyachenko distribution function. The system in this case is finite but growing. We are able to embed a central mass in the universal steady distribution only by iteration, except in the case of massless particles. The iteration yields logarithmic corrections to the massless particle case and requires a `renormalization' of the central mass. A central spherical mass may be accurately embedded in the Fridmann and Polyachenko growing distribution however. Some speculation is given concerning the importance of radial collisionless infall in actual galaxy formation.Comment: 10 pp, 3 fig

Gestion des conflits sur les pompes à main dans les villages du Burkina Faso

Version anglaise disponible dans la Bibliothèque numérique du CRDI: Burkina Faso : managing conflict at the village handpump and beyon

Reducing maternal and infant mortality in Indonesia

French version available in IDRC Digital Library: Réduire les taux de mortalité maternelle et infantile en Indonési

Fishing for less mercury in the Amazon

French version available in IDRC Digital Library: Moins de mercure dans l'AmazoneSpanish version available in IDRC Digital Library: Lucha contra la contaminación del mercurio en el Amazona

Lucha contra la contaminación del mercurio en el Amazonas

Versión en inglés disponible en la Biblioteca Digital del IDRC: Fishing for less mercury in the AmazonVersión en francés disponible en la Biblioteca Digital del IDRC: Moins de mercure dans l'Amazon

Santé publique conjuguée à l'intérêt du secteur privé pour prévenir le paludisme

Version anglaise disponible dans la Bibliothèque numérique du CRDI: Preventing malaria : mixing public health interest with private profi