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Advancements in aerospace technologies, which rely on unsteady fluid dynamics, are being hindered by a lack of easy to use, computationally efficient unsteady computational fluid dynamics (CFD) software. Existing CFD platforms are capable of handling unsteady flapping, but the time, money and expertise required to run even a basic flapping simulation make design iteration and optimization prohibitively expensive for the average researcher.

In the present paper, a remedy to model the effects of viscosity is introduced to the original vortex method, in which the pitching moment amplitude grew over time for simulations involving multiple flapping cycles. The new approach described herein lumps far-field wake vortices to mimic the vortex decay, which is shown to improve the accuracy of the solution while keeping the pitching moment amplitude under control, especially for simulations involving many flapping cycles.

In addition to improving the accuracy of the solution, the new method greatly reduces the computation time for simulations involving many flapping cycles. The solution of the original vortex method and the new method are compared to published Navier–Stokes solver data and show very good agreement.

By utilizing a novel unsteady vortex method, which has been designed specifically to handle the highly unsteady flapping wing problems, it has been shown that the time to compute a solution is reduced by several orders of magnitude (Denda et al., 2016). Despite the success of the vortex method, especially for a small number of flapping cycles, the solution deteriorates as the number of flapping cycles increases due to the inherent lack of viscosity in the vortex method.

The purpose of this paper is to examine economic debates over the conception of barriers to entry and speculates which definitions can be applicable to the telecommunications industry, more specifically, the residential broadband market. Also, it seeks to clarify the various industrial factors that could prevent or mar the success of entry into the residential telecommunications market and it also seeks to introduce an analytical framework that can be adopted for evaluating the barriers to entry.

The approach takes the form of a literature review.

It clarifies the various industrial factors that could prevent or mar the success of entry into the residential telecommunications market and introduces an analytical framework that can be adopted for evaluating the barriers to entry.

Although market entry barriers are crucial industrial factors that influence the market share and profit of firms already in the market, very little research has specifically examined barriers in the telecommunications and broadband industry.

This scoping review utilizes findings from 80 articles to build a research model to study research-practice-policy networks in K-12 education systems. The purpose of this study was to generate a broad understanding of the variation in conceptualizations of research-practice-policy partnerships, rather than dominant conceptualizations.

Arskey and O'Malley's (2005) five stage scoping review process was utilized including: (1) a consultative process with partners to identify research questions, (2) identify relevant studies, (3) study selection based on double-blind peer review, (4) charting the data and (5) collating, summarizing and reporting the results in a research model identifying key dimensions and components of research-practice partnerships (RPPs).

Coburn et al. (2013) definition of RPPs arose as an anchoring definition within the emerging field. This article proposes a model for understanding the organization and work of RPPs arising from the review. At the core lies shared goals, coproduction and multistakeholder collaboration organized around three dimensions: (1) Systems and structures: funding, governance, strategic roles, policy environment, system alignment; (2) Collaborative processes: improvement planning and data use, communication, trusting relationships, brokering activities, capacity building; (3) Continuous Learning Cycles: social innovation, implementation, evaluation and adaptation.

By using a common framework, data across RPPs and from different studies can be compared. Research foci might test links between elements such as capacity building and impacts, or test links between systems and structures and how those elements influence collaborative processes and the impact of the RPPs. Research could test the generalizability of the framework across contexts. Through the application and use of the research model, various elements might be refuted, confirmed or refined. More work is needed to use this framework to study RPPs, and to develop accompanying data collection methods and instruments for each dimension and element.

The practical applications of the framework are to be used by RPPs as a learning framework for strategic planning, iterative learning cycles and evaluation. Many of the elements of the framework could be used to check-in with partners on how things are going – such as exploring how communication is working and whether these structures move beyond merely updates and reporting toward joint problem-solving. The framework could also be used prior to setting up an RPP as an organizing approach to making decisions about how that RPP might best operate.

Despite increased attention on multistakeholder networks in education, the conceptual understanding is still limited. This article analyzed theoretical and empirical work to build a systematic model to study RPPs in education. This research model can be used to: identify RPP configurations, analyze the impact of RPPs, and to compare similarities and differences across configurations.