The distinctive challenges and opportunities for creating leadership within social enterprises

Purpose The purpose of this study is to present a systematic assessment of the distinctive challenges and opportunities associated with creating leadership within the realm of social enterprise. A modified and expanded form of Grint’s leadership lenses heuristic framework (i.e. person, position, process, performance, purpose and place) is used to examine and highlight what is particular about creating leadership in social enterprises by virtue of their distinctive missions, strategic contexts, legal forms and organisational structures and cultures. Based on this initial exploration, five research priorities are identified to better understand and then develop leadership practice in the social enterprise realm. Design/methodology/approach An enhanced heuristic framework for systematically examining leadership within the social enterprise research literature has been applied, drawing on the leadership practice literature. The application is illustrated through six instrumental case studies. Findings While there are a number of similarities between leading in the social enterprise realm and leading within the private, public and not-for-profit sectors, the levels of complexity, ambiguity and the lack of an established theoretical and practical knowledge base makes creating leadership in the social enterprise sector that much more challenging. On the positive side of the ledger, the fact that the purpose is at the core of social enterprise means that it is relatively easier to use the purpose to create a basis for common meaningful action, compared to leadership within the private and public sectors. Related to this, given the strongly local or “glocal” nature of social enterprise, a ready opportunity exists for leaders to draw upon a place as a strategic resource in mobilising followers and other stakeholders. The novel, uncertain and pioneering nature of a social enterprise is also arguably more tolerant and accommodating of a leadership mindset that focuses on posing questions regarding “wicked” problems compared to public, private for-profit and, indeed, traditional not-for-profit sector organisations. Originality/value As far as we can ascertain, this is the first systematic attempt to examine the distinctive challenges and opportunities associated with creating leadership within the social enterprise realm. The application of the heuristic framework leads to the identification of five key inter-related lines of empirical research into leadership practices within social enterprises. </jats:sec

Dynamics of immersed molecules in superfluids

The dynamics of a molecule immersed in a superfluid medium are considered. Results are derived using a classical hydrodynamic approach followed by canonical quantization. The classical model, a rigid body immersed in incompressible fluid, permits a thorough analysis; its effective Hamiltonian generalizes the usual rigid-rotor Hamiltonian. In contrast to the free rigid rotor, the immersed body is shown to have chaotic dynamics. Quantization of the classical model leads to new and experimentally verifiable features. It is shown, for instance, that chiral molecules can behave as "quantum propellers": the rotational-translational coupling induced by the superfluid leads to a nonzero linear momentum in the ground state. Hydrogen peroxide is a strong candidate for experimental detection of this effect. The signature is a characteristic splitting of rotational absorption lines. The 1_{01} --> 1_{10} line in hydrogen peroxide, for example, is predicted to split into three lines separated by as much as 0.01 cm^{-1}, which is about the experimental linewidth.Comment: 10 pages, 3 figure

High Performance, Continuously Tunable Microwave Filters using MEMS Devices with Very Large, Controlled, Out-of-Plane Actuation

Software defined radios (SDR) in the microwave X and K bands offer the promise of low cost, programmable operation with real-time frequency agility. However, the real world in which such radios operate requires them to be able to detect nanowatt signals in the vicinity of 100 kW transmitters. This imposes the need for selective RF filters on the front end of the receiver to block the large, out of band RF signals so that the finite dynamic range of the SDR is not overwhelmed and the desired nanowatt signals can be detected and digitally processed. This is currently typically done with a number of narrow band filters that are switched in and out under program control. What is needed is a small, fast, wide tuning range, high Q, low loss filter that can continuously tune over large regions of the microwave spectrum. In this paper we show how extreme throw MEMS actuators can be used to build such filters operating up to 15 GHz and beyond. The key enabling attribute of our MEMS actuators is that they have large, controllable, out-of-plane actuation ranges of a millimeter or more. In a capacitance-post loaded cavity filter geometry, this gives sufficient precisely controllable motion to produce widely tunable devices in the 4-15 GHz regime.Comment: 12 pages 14 figures 2 table

Vacuum field energy and spontaneous emission in anomalously dispersive cavities

Anomalously dispersive cavities, particularly white light cavities, may have larger bandwidth to finesse ratios than their normally dispersive counterparts. Partly for this reason, their use has been proposed for use in LIGO-like gravity wave detectors and in ring-laser gyroscopes. In this paper we analyze the quantum noise associated with anomalously dispersive cavity modes. The vacuum field energy associated with a particular cavity mode is proportional to the cavity-averaged group velocity of that mode. For anomalously dispersive cavities with group index values between 1 and 0, this means that the total vacuum field energy associated with a particular cavity mode must exceed $\hbar \omega/2$. For white light cavities in particular, the group index approaches zero and the vacuum field energy of a particular spatial mode may be significantly enhanced. We predict enhanced spontaneous emission rates into anomalously dispersive cavity modes and broadened laser linewidths when the linewidth of intracavity emitters is broader than the cavity linewidth.Comment: 9 pages, 4 figure

Stakeholder Contributions to Container Port Capacity: A Survey of Port Authorities

Given recent concerns about North American port congestion, this paper examines stakeholder involvement in expanding port capacity to meet significant volume growth. North American container port authorities were surveyed to identify key capacity factors and subsequent participation requirements by stakeholders such as terminal operators, longshore labor, railroads, steamship lines, truckers, and government. The resulting analysis indicates port frustration with participation currently offered by all stakeholders, especially the federal government and railroads. Such results further validate the requirement for a multi-stakeholder approach to port capacity expansion and suggest the need for national freight policy and planning leadership

Communications

A letter to the editor is presented in response to the article The Georgia Confederate Flag Dispute, by J. Michael Martinez in the summer 2008 issue along with the response of the author

Stakeholder Contributions to Container Port Capacity: A Survey of Port Authorities

Given recent concerns about North American port congestion, this paper examines stakeholder involvement in expanding port capacity to meet significant volume growth. North American container port authorities were surveyed to identify key capacity factors and subsequent participation requirements by stakeholders such as terminal operators, longshore labor, railroads, steamship lines, truckers, and government. The resulting analysis indicates port frustration with participation currently offered by all stakeholders, especially the federal government and railroads. Such results further validate the requirement for a multi-stakeholder approach to port capacity expansion and suggest the need for national freight policy and planning leadership

Mantle devolatilization and convection: Implications for the thermal history of the Earth

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/95357/1/grl3652.pd