A game-theoretic network formation model

We study the dynamics of a game-theoretic network formation model that yields large-scale small-world networks. So far, mostly stochastic frameworks have been utilized to explain the emergence of these networks. On the other hand, it is natural to seek for game-theoretic network formation models in which links are formed due to strategic behaviors of individuals, rather than based on probabilities. Inspired by Even-Dar and Kearns (2007), we consider a more realistic model in which the cost of establishing each link is dynamically determined during the course of the game. Moreover, players are allowed to put transfer payments on the formation of links. Also, they must pay a maintenance cost to sustain their direct links during the game. We show that there is a small diameter of at most 4 in the general set of equilibrium networks in our model. Unlike earlier model, not only the existence of equilibrium networks is guaranteed in our model, but also these networks coincide with the outcomes of pairwise Nash equilibrium in network formation. Furthermore, we provide a network formation simulation that generates small-world networks. We also analyze the impact of locating players in a hierarchical structure by constructing a strategic model, where a complete b-ary tree is the seed network.

The role of retinoic acid in long-term memory formation and synaptic plasticity in the mollusc Lymnaea stagnalis

The active metabolite of vitamin A, retinoic acid (RA), is involved in memory formation and hippocampal plasticity in vertebrates. A similar role for retinoid signaling in learning and memory formation has not previously been examined in an invertebrate species. However, the conservation of retinoid signaling between vertebrates and invertebrates is supported by the presence of retinoid signaling machinery in invertebrates. For example, in the mollusc Lymnaea stagnalis the metabolic enzymes and retinoid receptors have been cloned from the CNS. In this study I demonstrated that impairing retinoid signaling in Lymnaea by either inhibiting RALDH activity or using retinoid receptor antagonists, prevented the formation of long-term memory (LTM). However, learning and intermediate-term memory were not affected. An additional finding was that exposure to constant darkness (due to the light-sensitive nature of RA) itself enhanced memory formation. This memory-promoting effect of darkness was sufficient to overcome the inhibitory effects of RALDH inhibition, but not that of a retinoid receptor antagonist, suggesting that environmental light conditions may influence retinoid signaling. Since RA also influences synaptic plasticity underlying hippocampal-dependent memory formation, I also examined whether RA would act in a trophic manner to influence synapse formation and/or synaptic transmission between invertebrate neurons. However, I found no evidence to support an effect of RA on post-tetanic potentiation of a chemical synapse. Retinoic acid did, however, reduce transmission at electrical synapses in a cell-specific manner. Overall, these studies provide the first evidence for a role of RA in the formation of implicit long-term memories in an invertebrate species and suggest that the role of retinoid signaling in memory formation has an ancient origin.

Christian Education and the Ethics of Authenticity

A qualitative study was undertaken to explore the concept of authenticity in Christian education. The study was situated in the context of Christian schools in Ontario. Some of these schools have experienced declining enrolment and all of these schools face the challenge of being distinctive in a secular culture. To investigate the potential of the concept of authenticity for reclaiming the vision of Christian education, interviews were conducted with 3 experienced principals of Christian schools. Data analysis yielded an emergent conceptual framework of authenticity consisting of 5 concepts: authorship, relatedness, reflection, autonomy, and excellence. Authenticity was found to be a useful tool for school analysis of both the deep structures and the surface structures within Christian schools. To offset unauthentic tendencies that can arise within these schools, this study calls for an intentional use of the lens of authenticity to expose these tendencies and revitalize core expectations. Through the narratives shared by the Christian school principals, the study also develops a picture of the role of authentic Christian education in the development of the authentic Christian person.

Understanding the Intersection of Reformed Faith and Dutch Immigrant Culture in Ontario Independent Christian Schools: Principals’ Experiences and Perspectives

In the aftermath of World War II, a wave of Dutch Reformed immigrants arrived in Ontario, many of whom joined the Christian Reformed Church. Following familiar cultural patterns, history, and their Reformed Christian faith, these immigrants settled in Ontario with remarkable institutional completeness (Breton, 1964). They quickly established independent, parent-operated Christian schools across Ontario. The primary purpose of the schools was to educate children through a comprehensive biblically based school program, yet this religious purpose often intersected with a Dutch immigrant ethnic culture. Van Dijk (2001) states that “the schools were the most important organization in maintaining the religious and ethnic identity of Calvinists” (p. 66). In this qualitative study I explore the intersection of Reformed faith and Dutch Canadian immigrant ethnic culture in Christian schools through the experiential and professional lens of eight retired principals. Employing a theoretical framework informed by Berger’s (1967) Sacred Canopy, I suggest that the intersection of faith and culture was experienced in the schools and was embodied by the schools themselves. Findings point to this intersection being located in the participants’ experience of (a) Dutchness, (b) the struggle for Christian education, (c) the ties that bound the school community together, and (d) the cloud of witnesses that founded and continues to support and encourage the Christian school community. The study offers insight into a Dutch Reformed immigrant group’s experience carving out a niche for themselves on the educational landscape in Ontario. This study also offers suggestions on how Christian schools can broaden their canopy and become more ethnically and denominationally diverse in the future.

Province of Upper Canada Grant (vellum) to Christian Myers of the Township of Cornwall

Province of Upper Canada Grant (vellum) to Christian Myers of the Township of Cornwall, son of Michael Myers, United Empire Loyalist. He is granted 200 acres on Lot no. 18 in the 9th Concession in the Township of Mountain in the County of Dundas. This document is faded and part of the paper are missing or stained. Some of the text is affected. A small piece is missing from the crown land seal which is also faded. This was registered in Feb. 1803, Dec. 1, 1802

Semblanza biográfica del genial escritor Hans Christian Andersen

UANL

On christian art

UANL

The christian's manual of faith and devotion...

UANL

« How to Teach Evidence-Based Clinical Practice 2002 » : Rapport de la semaine de formation

Rapport de la semaine de formation "How to teach Evidence-Based Clinical Practice 2002" tenue à McMaster University du 9 au 14 juin 2002. Le rapport présente le déroulement de la semaine, les apprentissages et les applications au travail.

"Les visites guidées à l’heure de la bibliothèque virtuelle ou le nouveau défi de la formation à l’information" et "Les principales approches d'organisation et d'accès aux ressources électroniques sur le Web"

Communications présentées conjointement au 32e congrès de la Corporation des bibliothécaires professionnels du Québec (CBPQ).

Habit Formation and the Persistence of Monetary Shocks

This paper studies the persistent effects of monetary shocks on output. Previous empirical literature documents this persistence, but standard general equilibrium models with sticky prices fail to generate output responses beyond the duration of nominal contracts. This paper constructs and estimates a general equilibrium model with price rigidities, habit formation, and costly capital adjustment. The model is estimated via Maximum Likelihood using US data on output, the real money stock, and the nominal interest rate. Econometric results suggest that habit formation and adjustment costs to capital play an important role in explaining the output effects of monetary policy. In particular, impulse response analysis indicates that the model generates persistent, hump-shaped output responses to monetary shocks.

Impact of Openness to Trade on Capital Formation in Developed and Emerging Markets: a Comparative Study.

Rapport de recherche