scholarly journals Yet Another Hat Game

10.37236/358 ◽  
2010 ◽  
Vol 17 (1) ◽  
Author(s):  
Maura B. Paterson ◽  
Douglas R. Stinson

Several different "hat games" have recently received a fair amount of attention. Typically, in a hat game, one or more players are required to correctly guess their hat colour when given some information about other players' hat colours. Some versions of these games have been motivated by research in complexity theory and have ties to well-known research problems in coding theory, and some variations have led to interesting new research. In this paper, we review Ebert's Hat Game, which garnered a considerable amount of publicity in the late 90's and early 00's, and the Hats-on-a-line Game. Then we introduce a new hat game which is a "hybrid" of these two games and provide an optimal strategy for playing the new game. The optimal strategy is quite simple, but the proof involves an interesting combinatorial argument.

2020 ◽  
Vol 11 (1) ◽  
pp. 134-145
Author(s):  
Norbert Francis

Abstract A major study has been released on the emergence in East Asia of the logographic, or logo-syllabic, writing systems inherited from Chinese writing, attending primarily to the adaptations and innovations implemented in Korea, Vietnam, Japan and by speakers of the Tai languages of Southern China and Northern Vietnam. It contributes to our understanding of the fundamental mechanisms, of how speakers of different languages transformed the character script. The book points to overarching research problems concerning the relationship between language and writing, how aspects of this relationship are based on universal principles of learning exemplified in bilingual literacy. The research questions presented by the author will ultimately help us better understand literacy learning and the nature of reading and writing ability in general.


2014 ◽  
Vol 116 (4) ◽  
pp. 1-38 ◽  
Author(s):  
Marilyn Cochran-Smith ◽  
Fiona Ell ◽  
Larry Ludlow ◽  
Lexie Grudnoff ◽  
Graeme Aitken

Background/Context In many countries, there are multiple studies intended to improve initial teacher education. These have generally focused on pieces of teacher education rather than wholes, and have used an underlying linear logic. It may be, however, that what is needed are new research questions and theoretical frameworks that account for wholes, not just parts, and take complex, rather than reductionist perspectives. Purpose This article examines the challenges and the promises of complexity theory as a framework for teacher education research. One purpose is to elaborate the basic tenets of complexity theory, summarize its previous uses, and identify key challenges. A second purpose is to propose a new research platform that combines complexity theory with critical realism (CT-CR) and prompts a new set of empirical questions and research methods. Research Design Drawing on scholarship from sociology and education, the underlying design—or logic—of this analytic essay is this: explanation of the basic tenets of complexity theory applied to teacher education, assessment of previous research informed by complexity theory, response to the major epistemological and methodological challenges involved in using complexity theory as a research framework, and proposal of a new set of questions and methods. Findings/Results Complexity theory is appealing to teacher education researchers who want to avoid simplistic and reductionist perspectives. However, most previous complexity research has not addressed the critiques: the proclivity of complexity theory for retrospective description; the assertion that, given its rejection of linear causality, complexity theory cannot provide causal explanations with implications for practice; and the charge that complexity-informed research cannot deal with the values and power inequalities inherent in the normative enterprise of education. Integrating complexity theory with critical realism provides a way to address these fundamental challenges. Building on this new platform, the essay proposes a new set of empirical questions about initial teacher education along with several innovative research methods to address those questions. Conclusions/Recommendations This essay concludes that the combination of complexity theory and critical realism offers a unique platform for teacher education research, which has theoretical consistency, methodological integrity, and practical significance. The essay recommends that its proposed new empirical questions and methods may have the capacity to show us where to look and what processes to trace as teacher candidates learn to enact practice that enhances the learning of all students, including those not well-served by the current system.


1976 ◽  
Vol 78 (2) ◽  
pp. 261-288 ◽  
Author(s):  
J. C. R. Hunt ◽  
R. Moreau

This paper is a summary of the first Euromech Colloquium to be held on Magnetohydrodynamics (MHD). It was organized in conjunction with the Centre National de la Recherche Scientifique and held at Grenoble from 16–19 March 1976 with 60 participants from 10 countries present. Papers were presented on laminar and turbulent MHD duct flows; heat transfer and two-phase flows in MHD; the effects of magnetic fields on instabilities and turbulence; the motion of and forces on solid objects in MHD flows; flow-measurement methods, and applications of MHD in the metallurgical industries, in sodium technology and in liquid-metal power generation. Our main conclusion is that there are many industrial applications of the existing body of research findings in MHD, but that quite new research problems have arisen as a result of the new applications, and that these need investigation. MHD lives!


2020 ◽  
Vol XI (2(31)) ◽  
pp. 55-79
Author(s):  
Mirosława Wawrzak- Chodaczek

With the increasing access to the Internet, a new era has begun in the field of human communication, work, education, entertainment, marketing and other areas of human activity. The development of information techniques gives the opportunity to access a huge amount of information that is used to acquire knowledge in various fields of science. The aim of the article is to show new research areas of the media, especially those penetrated by educators.


2018 ◽  
Vol 163 ◽  
pp. 05007
Author(s):  
Justyna Kuziak ◽  
Piotr Woyciechowski ◽  
Rafał Kobyłka ◽  
Aldona Wcisło

Blast-furnace slag cement (CEM III) has a wide range of acceptable Cl- content according to EN 197-1: 2012. This makes possible to use alternative fuels for the production of cement, which can increase the chlorides content in the clinker. However, it raises several new research problems, among them the problem of increase of the risk of Cl- penetration intensity due to the higher concentration of chlorides in cement, presented in this paper. Studies have shown that after a short hardening time (28 days) the rate of diffusion of chloride ions increases slightly with the increase in the content of chlorides in the cement CEM III, but after full stabilization of concrete properties (1 year), the content of chlorides in cement CEM III practically does not affect the diffusion rate of chloride ions in concrete.


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