Computer program for the attenuation of high bypass turbofan engine noise

Two computer programs determine effect of boundary layer on attenuation of sound in a circular duct lined with material used in noise suppresion in fan inlet and exhaust ducts of turbofan engines

Forbidden subgraphs that imply Hamiltonian-connectedness

It is proven that if $G$ is a $3$-connected claw-free graph which is also $Z_3$-free (where $Z_3$ is a triangle with a path of length $3$ attached), $P_6$-free (where $P_6$ is a path with $6$ vertices) or $H_1$-free (where $H_1$ consists of two disjoint triangles connected by an edge), then $G$ is Hamiltonian-connected. Also, examples will be described that determine a finite family of graphs $\cal{L}$ such that if a 3-connected graph being claw-free and $L$-free implies $G$ is Hamiltonian-connected, then $L\in\cal{L}$. \u

Performativity and convergence in comparative corporate governance

We engage with the convergence/divergence debate in the comparative study of corporate governance by commending a nuanced formulation of the convergence thesis. Directing attention to the precarious constitution and adoption of knowledge claims about corporate status and architecture in the field of corporate governance we suggest that the study of comparative corporate governance might usefully incorporate consideration of claims about corporate governance as potentially performative statements that function to stabilize particular ideas of status and architecture of the modern corporation with substantive outcomes for political economy, thereby influencing the shape of the institutions comprising the field of corporate governance. We conclude that the predominantly epistemological preoccupations of participants in the convergence/divergence debate could be usefully refined and supplemented by giving closer attention, empirical as well as theoretical, to the relation between performativity, convergence/divergence, and political economy

Social ontology and the modern corporation

In an assessment of Lawson’s social ontological analysis of the modern corporation, we consider what is marginalized: the significance of the status and the effects of the separate legal entity (SLE). The SLE is conceived as a specific type of construct that is ascribed particular properties through its stabilization within and between different (legal and economic) discourses. By showing how the SLE, as a reified construct, is rendered meaningful, real and/or consequential, we illustrate how the ‘social ontology’ of the modern corporation is radically contingent and inescapably contested. Given that the social ontology of the corporation defies definitive specification, we regard the prospect of the completeness of its disclosure (e.g. by foregrounding a specific referent) as problematic. Indeed, any account of social ontology that foregrounds a specific referent is seen to obscure a political process in which the stabilization of the SLE rests on the contingent foregrounding of particular priorities. This leads us to reflect on the power-inflected social organization of knowledge generation. Key to the explication of social ontology, and with specific reference to the corporation, is not, as Lawson contends, the concept of ‘community’ but the inescapability of contestation within relations of power that translate ontological openness into specific but precarious forms of ontic closure

Acoustic attenuation design requirements established through EPNL parametric trades

An optimization procedure for the provision of an acoustic lining configuration that is balanced with respect to engine performance losses and lining attenuation characteristics was established using a method which determined acoustic attenuation design requirements through parametric trade studies using the subjective noise unit of effective perceived noise level (EPNL)

An explicit multi-time-stepping algorithm for aerodynamic flows

An explicit multi-time-stepping algorithm with applications to aerodynamic flows is presented. In the algorithm, in different parts of the computational domain different time steps are taken, and the flow is synchronized at the so-called synchronization levels. The algorithm is validated for aerodynamic turbulent flows. For two-dimensional flows speedups in the order of five with respect to single time stepping are obtained.

Customer attractiveness, supplier satisfaction and preferred customer status: a review and a cycle model

In this paper, we introduce the concept of preferred customer status, i.e. a buyer is awarded preferential treatment of its important suppliers compared to their other customers. As there is a lack of knowledge of what motivates suppliers to serve selected buyers better than others, our research focuses on the suppliers’ evaluation of customers and how it can be influenced by buyers. Based on social exchange theory, we provide a conceptual model which proposes customer attractiveness, supplier satisfaction and knowledge of alternative customers as factors influencing suppliers to award preferred customer status. Subsequently, a literature review is provided to give an overview of the drivers of customer attractiveness, supplier satisfaction and preferred customer status already analysed in current literature. We conclude by providing a preliminary conceptual framework and suggesting future research directions in this field. This article proposes new insights into supplier relationship management and offers a state-of-the-art analysis as well as a theoretical base to this new research field

Convergent and divergent trajectories of corporate governance

This Special Issue revisits the classic question of comparative corporate governance research, namely whether national corporate governance systems are converging. More specifically, it focuses on several ‘convergence vectors’ which comprise the political, legal, economic and social arrangements that influence or drive the international trajectories of governance systems towards a common denominator. Taken together, the contributors to this Special Issue invite us to think critically about the functional explanations commonly mobilized in favour of convergence and consider instead the convergence debate from a broader and more interdisciplinary point of view

Branching of the Falkner-Skan solutions for λ < 0

The Falkner-Skan equation f'" + ff" + λ(1 - f'^2) = 0, f(0) = f'(0) = 0, is discussed for λ < 0. Two types of problems, one with f'(∞) = 1 and another with f'(∞) = -1, are considered. For λ = 0- a close relation between these two types is found. For λ < -1 both types of problem allow multiple solutions which may be distinguished by an integer N denoting the number of zeros of f' - 1. The numerical results indicate that the solution branches with f'(∞) = 1 and those with f'(∞) = -1 tend towards a common limit curve as N increases indefinitely. Finally a periodic solution, existing for λ < -1, is presented.