Challenges concerning the discriminatory optical force for chiral molecules

In response to arXiv:1506.07423v1 we discuss the authors work, and our own, on proposed schemes aiming to achieve a discriminatory optical force for chiral molecules

Good Government Means Different Things in Different Countries

Recent work on good governance implies a one best way model of effective government. This work has isomorphic influences on academic, donor and reform engagements in developing countries. But the one best way model actually does not hold, even for governments that score highly on governance indicators. Governments actually look different, even if they are similarly called 'effective' or 'models of good government.' The current article examines this issue and proposes a contingent approach to explain why good governments can look different. It suggests that government structures need to be explained in terms of the governing context--not the isomorphic influence of what indicators suggest good governance is. Key contextual factors that a contingent approach would consider in appraising government include economic challenges, demographic realities, and socio and political structures. The paper draws these factors out of an inductive analysis of differences in a set of OECD countries considered examples of 'good government.'

Isomorphism and the Limits to African Public Financial Management Reform

Many reform results fall below expectations in the development arena, especially in the public sector. Do the reforms just need more time to work better, or should we adjust our expectations? In addressing this question, the current article draws from isomorphism to think about potential limits to reform in developing countries. The theory is considered appropriate for thinking about change processes in the developing world. It presents change as motivated more by the need for legitimacy than efficiency and, in identifying the mechanics of change, points to potential limits of such change: to organizational dimensions that are visible, peripheral and involves concentrated sets of professional agents. These limiting factors are applied to a study of public financial management reform in 31 African countries which shows that some dimensions do appear more limited to isomorphic influence than others. Isomorphic change may indeed face natural limits, something the development community should consider in thinking about how it goes about facilitating and motivating reform in its client countries

Civic Associations That Work: The Contributions of Leadership to Organizational Effectiveness

Why are some civic associations more effective at advancing their public agendas, engaging members, and developing leaders? We introduce a multi-dimensional framework for analyzing the comparative effectiveness of member-based civic associations in terms of public influence, member engagement, and leader development. Theoretical expectations in organization studies, sociology, political science, and industrial relations hold that organizations benefiting from either a favorable environment or abundant resources will be most effective. Using systematic data on the Sierra Clubs 400 local organizations, we assess these factors alongside an alternative approach focusing on the role of leaders, how they work together, and the activities they carry out to build capacity and conduct programs. While we find modest support for the importance of an organizations available resources and external environment, we find strong evidence for each of our three outcomes supporting our claim that effectiveness in civic associations depends to a large degree on internal organizational practices.This publication is Hauser Center Working Paper No. 36. The Hauser Center Working Paper Series was launched during the summer of 2000. The Series enables the Hauser Center to share with a broad audience important works-in-progress written by Hauser Center scholars and researchers

Expanded horizons for generating and exploring optical angular momentum in vortex structures

Spin provides for a well-known extension to the information capacity of nanometer-scale electronic devices. Spin transfer can be effected with high fidelity between quantum dots, this type of emission being primarily associated with emission dipoles. However, in seeking to extend the more common spectroscopic connection of dipole transitions with orbital angular momentum, it has been shown impossible to securely transmit information on any other multipolar basis – partly because point detectors are confined to polarization measurement. Standard polarization methods in optics provide for only two independent degrees of freedom, such as the circular states of opposing handedness associated with photon spin. Complex light beams with structured wave-fronts or vector polarization do, however, offer a basis for additional degrees of freedom, enabling individual photons to convey far more information content. A familiar example is afforded by Laguerre-Gaussian modes, whose helically twisted wave-front and vortex fields are associated with orbital angular momentum. Each individual photon in such a beam has been shown to carry the entire spatial helical-mode information, supporting an experimental basis for sorting beams of different angular momentum content. One very recent development is a scheme for such optical vortices to be directly generated through electronic relaxation processes in structured molecular chromophore arrays. © (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE)