Solitary and compact-like shear waves in the bulk of solids

We show that a model proposed by Rubin, Rosenau, and Gottlieb [J. Appl. Phys. 77 (1995) 4054], for dispersion caused by an inherent material characteristic length, belongs to the class of simple materials. Therefore, it is possible to generalize the idea of Rubin, Rosenau, and Gottlieb to include a wide range of material models, from nonlinear elasticity to turbulence. Using this insight, we are able to fine-tune nonlinear and dispersive effects in the theory of nonlinear elasticity in order to generate pulse solitary waves and also bulk travelling waves with compact support

Reputation and Accountability Relationships: Managing Accountability Expectations through Reputation

ArticleAccountability is said to be about the management of expectations. Empirical studies reveal considerable variation in organizational interest, intensity and investment in accountability relationships. Less is known, however, as to what explains these observed variations. Drawing on accountability and reputation-concerned literatures, this paper argues that a reputation-based perspective to accountability offers an underlying logic that explains how account-giving actors and account-holding forums actually manage these expectations, how organisations make sense of and prioritise among accountability responsibilities. Reputational considerations act as a filtering mechanism of external demands and help account for variations in degrees of interest in, and intensity of, accountability. The resulting accountability outcomes are co-produced by the reputational investment of both account-giver and account-holder, resulting in distinct accountability constellations and outcome

Meeting expectations in the EU regulatory state? Regulatory communications amid conflicting institutional demands

Horizon 2020(H2020)716439The politics and administration of institutional chang

Reputation and accountability relationships: managing accountability expectations through reputation

Accountability is said to be about the management of expectations. Empirical studies reveal considerable variation in organizational interest, intensity and investment in accountability relationships. Less is known, however, as to what explains these observed variations. Drawing on accountability and reputation-concerned literatures, this paper argues that a reputation-based perspective to accountability offers an underlying logic that explains how account-giving actors and account-holding forums actually manage these expectations, how organisations make sense of and prioritise among accountability responsibilities. Reputational considerations act as a filtering mechanism of external demands and help account for variations in degrees of interest in, and intensity of, accountability. The resulting accountability outcomes are co-produced by the reputational investment of both account-giver and account-holder, resulting in distinct accountability constellations and outcome

A multidimensional reputation barometer for public agencies: a validated instrument

Horizon 2020(H2020)716439Public Administration - OU

OPTICAL AND PHOTOCATALYTIC PROPERTIES OF ELECTROSPUN ZnO FIBERS

ZnO nanofibers were obtained by electrospinning a solution of zinc acetate dihydrate and polyvinylpyrrolidone in N,N-dimethylformamide, followed by calcination at 500, 650 or 800 °C for 1 h. X-ray diffraction, selected area electron diffraction, scanning electron microscopy, transmission electron microscopy, reflectance spectroscopy and photoluminescence spectroscopy were used for the characterization of the resulting fibers. The thermally treated samples exhibit ZnO single phase with polycrystalline hexagonal structure. The morphological investigation revealed an accentuated contraction process during calcination, as well as the increase of the crystallite size and the appearance of a breaking tendency with the calcination temperature enhancement. Both UV and Visible emissions under excitation at 350 nm were showed by the optical studies, which also led to band gap values slightly lower than those reported for similar one-dimensional nanostructures. In order to assess the photocatalytic activity of ZnO fibers, the photodegradation of methylene blue in aqueous medium (10 -3 M) under UV irradiation (368 nm) was analyzed

Modular symbols in Iwasawa theory

This survey paper is focused on a connection between the geometry of $\mathrm{GL}_d$ and the arithmetic of $\mathrm{GL}_{d-1}$ over global fields, for integers $d \ge 2$. For $d = 2$ over $\mathbb{Q}$, there is an explicit conjecture of the third author relating the geometry of modular curves and the arithmetic of cyclotomic fields, and it is proven in many instances by the work of the first two authors. The paper is divided into three parts: in the first, we explain the conjecture of the third author and the main result of the first two authors on it. In the second, we explain an analogous conjecture and result for $d = 2$ over $\mathbb{F}_q(t)$. In the third, we pose questions for general $d$ over the rationals, imaginary quadratic fields, and global function fields.Comment: 43 page

Global generalized solutions for Maxwell-alpha and Euler-alpha equations

We study initial-boundary value problems for the Lagrangian averaged alpha models for the equations of motion for the corotational Maxwell and inviscid fluids in 2D and 3D. We show existence of (global in time) dissipative solutions to these problems. We also discuss the idea of dissipative solution in an abstract Hilbert space framework.Comment: 27 pages, to appear in Nonlinearit