Study made of destructive sectioning of complex structures for examination

Advances in destructive sectioning of very small or complex structures are discussed. Examination is made by filling the structure in a vacuum with a low viscosity potting compound and then cutting without danger of spatial disorientation

Valentine v. State of Nevada, 135 Nev. Adv. Op. 62 (Dec. 19, 2019)

The Court held that evidentiary hearings are appropriate on fair-cross-section challenges when the defendant makes specific allegations that, if true, would be sufficient to constitute a prima facie violation of the state’s fair-cross-section requirement. The Court also briefly discussed appellant’s claims of insufficient evidence and prosecutorial misconduct regarding DNA evidence. The Court found that neither claim warranted a new trial

Educational innovation, learning technologies and Virtual culture potential’

Learning technologies are regularly associated with innovative teaching but will they contribute to profound innovations in education itself? This paper addresses the question by building upon Merlin Donald's co‐evolutionary theory of mind, cognition and culture. He claimed that the invention of technologies for storing and sharing external symbol systems, such as writing, gave rise to a ‘theoretic culture’ with rich symbolic representations and a resultant need for formal education. More recently, Shaffer and Kaput have claimed that the development of external and shared symbol‐processing technologies is giving rise to an emerging ‘virtual culture’. They argue that mathematics curricula are grounded in theoretic culture and should change to meet the novel demands of ‘virtual culture’ for symbol‐processing and representational fluency. The generic character of their cultural claim is noted in this paper and it is suggested that equivalent pedagogic arguments are applicable across the educational spectrum. Hence, four general characteristics of virtual culture are proposed, against which applications of learning technologies can be evaluated for their innovative potential. Two illustrative uses of learning technologies are evaluated in terms of their ‘virtual culture potential’ and some anticipated questions about this approach are discussed towards the end of the paper

Out of the Night

I did not graduate. After four years of college, waiting for the day I could shake President Riggs’ hand, receive my diploma, and depart our campus with pride and honor, that day never came. One of the hardest things I’ve ever had to do was watch from the back row of the audience as everyone I had attended school with for the last four years, my classmates, my friends, all received their diplomas and moved on without me. The stares from teachers I knew, the surprised looks from underclassmen, the careful tact with which everyone avoided the subject of not graduating in my presence, like I had died and they just didn’t want to tell me. [excerpt

Simulation modelling: Educational development roles for learning technologists

Simulation modelling was in the mainstream of CAL development in the 1980s when the late David Squires introduced this author to the Dynamic Modelling System. Since those early days, it seems that simulation modelling has drifted into a learning technology backwater to become a member of Laurillard's underutilized, ‘adaptive and productive’ media. Referring to her Conversational Framework, Laurillard constructs a pedagogic case for modelling as a productive student activity but provides few references to current practice and available resources. This paper seeks to complement her account by highlighting the pioneering initiatives of the Computers in the Curriculum Project and more recent developments in systems modelling within geographic and business education. The latter include improvements to system dynamics modelling programs such as STELLA®, the publication of introductory textbooks, and the emergence of online resources. The paper indicates several ways in which modelling activities may be approached and identifies some educational development roles for learning technologists. The paper concludes by advocating simulation modelling as an exemplary use of learning technologies ‐ one that realizes their creative‐transformative potential

The Use of Traditional and Contemporary Instructional Strategies and Materials in the Elementary Mathematics Classroom

Elementary school teachers were surveyed about the strategies and materials they use to teach elementary school mathematics. A list of twenty strategies and materials derived from the Changes in Content and Emphasis sections of the National Council of Teachers of Mathematics (NCTM) Curriculum and Evaluation Standards for School Mathematics were examined [1]. These strategies represent both contemporary and traditional approaches to the teaching of mathematics. Teachers were asked to respond to each survey item by indicating how often these strategies were used in their classrooms. The findings were compared to the goals of the NCTM Standards to assess how much progress has been made in the effort to influence elementary school mathematics instruction. Compared to these goals and the call for change in instructional strategies by the Standards, results seem to be mixed with progress in some areas and not in others. Teacher-centered, whole-group instruction remains the dominant pedagogical form, but approaches using concrete materials seem to be on the increase