scholarly journals Over One Hundred Million Simulations Delivered: A Case Study of the PhET Interactive Simulations

Author(s):  
Raina Khatri ◽  
Charles R. Henderson ◽  
Renee Cole ◽  
Jeff Froyd
Author(s):  
Francesco Ferrise ◽  
Monica Bordegoni ◽  
Umberto Cugini

The paper describes the development of a multimodal environment that can be used as a tool to train operators to perform maintenance tasks of industrial products during their lifecycle. The environment provides a visual and haptic representation of a product through the use of commercially-available hardware and software technologies. The new environment mixes interactive simulations of products, based on Virtual Reality technologies, and the information included in the traditional instruction manuals. The paper discusses about what can be effectively simulated with the available technology, and how the current technological limitations can be overcome by using the potentialities offered by a multimodal approach. Technology limitations can also be overcome by mixing two different strategies for coupling parts: the physics-based and the constraint-based approach. A case study provided by a company working in the field of household appliances has been used to prove the concept, to develop, test and finally refine the multimodal environment. The paper describes the development of the multimodal environment and presents the results of the user tests.


2001 ◽  
Vol 17 (1) ◽  
Author(s):  
Geoff Andrewartha ◽  
Simon Wilmot

Educational researchers have long derided the university lecture as an effective mode of delivery of educational materials, but currently there are many reports on the advantages offered by computer. In this study a multimedia solution was sought to replace existing face to face lectures because it appeared to offer a close ‘media versus need’ match. Consequently, a decision was made to develop a design template for an interactive computer based program that would be suitable for a range of subject content. In order to personalise the instruction, a large video insert was incorporated as the main screen’s most prominent design feature. From here the learner could navigate to support material including interactive simulations. The program was piloted with a small group of students and, in particular, the student tracking data that the program automatically generates yield some interesting learning style information.


2014 ◽  
Vol 38 (01) ◽  
pp. 102-129
Author(s):  
ALBERTO MARTÍN ÁLVAREZ ◽  
EUDALD CORTINA ORERO

AbstractUsing interviews with former militants and previously unpublished documents, this article traces the genesis and internal dynamics of the Ejército Revolucionario del Pueblo (People's Revolutionary Army, ERP) in El Salvador during the early years of its existence (1970–6). This period was marked by the inability of the ERP to maintain internal coherence or any consensus on revolutionary strategy, which led to a series of splits and internal fights over control of the organisation. The evidence marshalled in this case study sheds new light on the origins of the armed Salvadorean Left and thus contributes to a wider understanding of the processes of formation and internal dynamics of armed left-wing groups that emerged from the 1960s onwards in Latin America.


2020 ◽  
Vol 43 ◽  
Author(s):  
Michael Lifshitz ◽  
T. M. Luhrmann

Abstract Culture shapes our basic sensory experience of the world. This is particularly striking in the study of religion and psychosis, where we and others have shown that cultural context determines both the structure and content of hallucination-like events. The cultural shaping of hallucinations may provide a rich case-study for linking cultural learning with emerging prediction-based models of perception.


2019 ◽  
Vol 42 ◽  
Author(s):  
Daniel J. Povinelli ◽  
Gabrielle C. Glorioso ◽  
Shannon L. Kuznar ◽  
Mateja Pavlic

Abstract Hoerl and McCormack demonstrate that although animals possess a sophisticated temporal updating system, there is no evidence that they also possess a temporal reasoning system. This important case study is directly related to the broader claim that although animals are manifestly capable of first-order (perceptually-based) relational reasoning, they lack the capacity for higher-order, role-based relational reasoning. We argue this distinction applies to all domains of cognition.


2019 ◽  
Vol 42 ◽  
Author(s):  
Penny Van Bergen ◽  
John Sutton

Abstract Sociocultural developmental psychology can drive new directions in gadgetry science. We use autobiographical memory, a compound capacity incorporating episodic memory, as a case study. Autobiographical memory emerges late in development, supported by interactions with parents. Intervention research highlights the causal influence of these interactions, whereas cross-cultural research demonstrates culturally determined diversity. Different patterns of inheritance are discussed.


Author(s):  
D. L. Callahan

Modern polishing, precision machining and microindentation techniques allow the processing and mechanical characterization of ceramics at nanometric scales and within entirely plastic deformation regimes. The mechanical response of most ceramics to such highly constrained contact is not predictable from macroscopic properties and the microstructural deformation patterns have proven difficult to characterize by the application of any individual technique. In this study, TEM techniques of contrast analysis and CBED are combined with stereographic analysis to construct a three-dimensional microstructure deformation map of the surface of a perfectly plastic microindentation on macroscopically brittle aluminum nitride.The bright field image in Figure 1 shows a lg Vickers microindentation contained within a single AlN grain far from any boundaries. High densities of dislocations are evident, particularly near facet edges but are not individually resolvable. The prominent bend contours also indicate the severity of plastic deformation. Figure 2 is a selected area diffraction pattern covering the entire indentation area.


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