We study the fracture surface of three dimensional samples through a model for quasi-static fractures known as Born Model. In particular, we consider the roughness of this fracture surface. We find for the roughness exponent a value ζ = 0.5 expected for “small length scales” in microfracturing experiments. Since this corresponds to a slow evolution for the fracture, our simulations confirm that...

We consider a theory of gauge fields and fermions which we argue gives rise to dynamics similar to that of the Nambu–Jona-Lasinio (NJL) model when a gauge coupling constant is appropriately fine-tuned. We discuss the application of this model to dynamical electroweak symmetry breaking by a top-quark condensate. In this model, custodial symmetry is violated solely by perturbatively weak interact...

Online support groups have been used extensively, in numerous areas of distress, for 15 years. Researchers have presented conflicting findings and ideas about their effectiveness in helping people cope with respective problems. Our review of quantitative studies and our qualitative exploration of the nature of the experiences that occur in such groups show that several factors operate to potent...

One of the foundational questions underlying strategy research relates to identifying characteristics of economic situations that enable value appropriation by firms. Recently, MacDonald & Ryall (2004) presented a coalition game based framework within which the mechanism of value appropriation in competitive situations can be formally modeled and analyzed. They subsequently use their formulatio...

In many cases two interacting agents are concurrently administered, but are taken to minimize interactions or side effects. Precautions, such as dosage adjustments, must be taken in this event. Drug interactions are not always adverse, and they are sometimes taken advantage of therapeutically. For example, probenecid can be administered with penicillin to decrease the excretion rate of the peni...

A current and major difficulty in civilizational studies is how to deal with the concepts of “civilization” and culture.” As these terms are simultaneously distinct and overlap, arose through a historical process that was key to modernity and are also at the root of a variety of disciplinary connections, they constitute a perfect case of semantic entanglement. Confusion has resulted from this e...

School racial climate is an important aspect of the school environment that can have significant implications for youths’ development. However, existing research is limited by conceptual and methodological concerns that restrict the ability of researchers and educators to identify what about and how the racial climate is important. The author addresses existing limitations by articulating schoo...

Micro-scale changes in earthworm communities and ground cover types were studied along five transect lines in an unmanaged beech forest (Fontainebleau forest, France). Spatial patterns were interpreted to the light of interactions between earthworm species and forest architecture, ground vegetation and quantity as well as quality of litter. The anecic Lumbricus terrestris was associated with pa...

Recent research on Augmented Reality (AR) gaming suggests that place-based AR games embedded in larger curricular units provide contexts and scaffolding for developing students' scientific argumentation skills. This project explores the potential of one specific place-based AR gaming unit, Sick at South Shore Beach, to develop students’ argumentation skills and increase their understanding of t...

this study aims at empirically furthering awareness of the organization of interaction in efl classes. informed by the methodological framework of conversation analysis, it draws upon a corpus of 52 three-hour naturally-occurring classroom interaction to identify classroom interactional contexts based on the structuring of the pedagogic goals in turn-taking sequences. conversation analytic proc...