Implementation of best practices in online learning: A review and future directions

Best practices for helping students learn and retain information have been well established by research in cognitive science (Brown, Roediger, & McDaniel, 2014; Dunlosky, Rawson, Marsh, Nathan, & Willingham, 2013). Specifically, repeated testing has been shown in numerous instances to enhance recall. In particular, we know that students retain information best when it has been recalled versus re-studied (Butler, 2010) and rehearsed with delayed (spaced) versus massed presentation (Cepeda, Pashler, Vul, Wixted, & Rohrer, 2006), and when the items to be studied and later tested are similarly framed (McDaniel, Wildman, & Anderson, 2012). Although these effects were initially demonstrated in laboratory settings, a number of researchers have shown that they generalize to classroom environments (e.g. Vlach & Sandhofer, 2012) and some have demonstrated their utility in fully online courses as well (McDaniel et al., 2012). However, in multiple studies we have found that implementing some of these best practices using publisher-provided textbook technology supplements (TTS) does not meaningfully improve recall (Bell, Simone & Whitfield, 2015; 2016), at least when these supplements are used “out-of-the-box” in face-to-face courses. We conclude when using TTS in an online environment there is a mismatch between student and faculty goals, in that students are motivated by short-term goals of getting high score of a quiz even if the behaviors used to achieve that score do not enhance long-term recall or generalization of the learned material, which typically are the goals of faculty. We argue that TTS can be reconfigured to reinforce meaningful engagement with the material for all students, regardless of learning history or other individual differences of students (e.g., Gluckman, Vlach & Sandhofer, 2014). Actually, in order to continue to require the purchase of these TTS by students, we should determine whether their use is beneficial to all types of students. A related empirical question is whether recall of factual information in an online environment is correlated with the later ability to use that information in a novel situation (generalizability). Whereas some researchers have found that factual information learned via repeated testing does help students to draw inferences about the implications of those facts in later testing (Butler, 2010), others have failed to find a correlation between testing effects and generalizability of the learned material (Gluckman et al., 2014). The literature on this question is still somewhat small, however, (see Carpenter, 2012, for a brief review) and this is particularly true of investigations involving online learning. In this paper we review the existing literature of the spacing benefit and online learning. We end with a proposal for the need of new research specific to the online environment that manipulates delayed repeated testing and examines whether successful retention of factual information promotes long-term application of that material

Evaluation of meta-benzenedisulfonic acid as a stress-reducing additive in a Watts nickel electroplating bath

Internal stress and deposit hardness of nickel electrodeposited containing controlled quantities of meta-benzenedisulfonic aci

Coupling CAD and CFD codes within a virtual integration platform

The Virtual Integration Platform (VIP) is an essential component of the VIRTUE project. It provides a system for combining disparate numerical analysis methods into a simulation environment. The platform allows for defining process chains, allocating of which tools to be used, and assigning users to perform the individual tasks. The platform also manages the data that are imported into or generated within a process, so that a version history of input and output can be evaluated. Within the VIP, a re-usable template for a given process chain can be created. A process chain is composed of one or more smaller tasks. For each of these tasks, a selection of available tools can be allocated. The advanced scripting methods in the VIP use wrappers for managing the individual tools. A wrapper allows communication between the platform and the tool, and passes input and output data as necessary, in most cases without modifying the tool in any way. In this way, third-party tools may also be used without the need for access to source code or special modifications. The included case study demonstrates several advantages of using the integration platform. A parametric propeller design process couples CAD and CFD codes to adapt the propeller to given operating constraints. The VIP template helped eliminate common user errors, and captured enough expert knowledge so that the casual user could perform the given tasks with minimal guidance. Areas of improvements to in-house codes and to the overall process were identified while using the integration platform. Additionally, the process chain was designed to facilitate formal optimisation methods

High speed turboprop aeroacoustic study (counterrotation). Volume 1: Model development

The isolated counterrotating high speed turboprop noise prediction program was compared with model data taken in the GE Aircraft Engines Cell 41 anechoic facility, the Boeing Transonic Wind Tunnel, and in NASA-Lewis' 8x6 and 9x15 wind tunnels. The predictions show good agreement with measured data under both low and high speed simulated flight conditions. The installation effect model developed for single rotation, high speed turboprops was extended to include counterotation. The additional effect of mounting a pylon upstream of the forward rotor was included in the flow field modeling. A nontraditional mechanism concerning the acoustic radiation from a propeller at angle of attach was investigated. Predictions made using this approach show results that are in much closer agreement with measurement over a range of operating conditions than those obtained via traditional fluctuating force methods. The isolated rotors and installation effects models were combines into a single prediction program, results of which were compared with data taken during the flight test of the B727/UDF engine demonstrator aircraft. Satisfactory comparisons between prediction and measured data for the demonstrator airplane, together with the identification of a nontraditional radiation mechanism for propellers at angle of attack are achieved

Sparse experimental design : an effective an efficient way discovering better genetic algorithm structures

The focus of this paper is the demonstration that sparse experimental design is a useful strategy for developing Genetic Algorithms. It is increasingly apparent from a number of reports and papers within a variety of different problem domains that the 'best' structure for a GA may be dependent upon the application. The GA structure is defined as both the types of operators and the parameters settings used during operation. The differences observed may be linked to the nature of the problem, the type of fitness function, or the depth or breadth of the problem under investigation. This paper demonstrates that advanced experimental design may be adopted to increase the understanding of the relationships between the GA structure and the problem domain, facilitating the selection of improved structures with a minimum of effort

Microbiological studies relating to clean environments. Part I - Evaluation of the efficiency of a class 100 laminar-flow clean room for viable contamination cleanup

Laminar flow clean room efficiency for viable contamination cleanu

Microbiological studies relating to clean environments. Part II - Deposition of nutrients to surfaces by Rodac plates

Nutrient deposition to surfaces by Rodac plates observed to evaluate microbial growth in clean environmen

A connectionist model for dynamic control

The application of a connectionist modeling method known as competition-based spreading activation to a camera tracking task is described. The potential is explored for automation of control and planning applications using connectionist technology. The emphasis is on applications suitable for use in the NASA Space Station and in related space activities. The results are quite general and could be applicable to control systems in general

Clonal mixing in the soldier-producing aphid <i>Pemphigus spyrothecae</i> (Hemiptera: Aphididae)

Illuminating the genetic relationships within soldier-producing aphid colonies is an essential element of any attempt to explain the evolution of the altruistic soldier caste. Pemphigus spyrothecae is a soldier-producing aphid that induces galls on the leaf petioles of its host (trees of the genus Populus). At least a quarter of the aphids within the clonally produced gall population are morphologically and behaviourally distinct first-instar soldiers that defend the gall population from predation. Using field trapping and microsatellites, we investigated the degree of clonal mixing within natural gall populations. Field trapping in the UK showed that all the migrants of P. spyrothecae and of two other Pemphigus species were wingless first-instar soldiers. The average degree of mixing estimated from trapping P. spyrothecae migrants was 0.68% (range = 0–15%). Microsatellite genotyping of 277 aphids from 13 galls collected in Italy revealed an average mixing level of 10.4% (range = 0–59%). Six galls contained more than one clone (range = 2–5 clones). Non-kin aphids were not restricted to the soldier caste but were evenly distributed across instars. An additional gall, from which 527 occupants were genotyped, contained 12 non-kin aphids distributed among nine clones, showing that clonal diversity can be high even when mixing is very low. These observations suggest that although soldiers migrate regularly and can moult and reproduce within foreign galls, clonal mixing in this species is generally low and is unlikely to provide a barrier to the evolution of investment by the aphid clones in an altruistic soldier caste