Postsynthetic modification of zirconium metal-organic frameworks

Metal-organic frameworks (MOFs) have been in the spotlight for a number of years due to their chemical and topological versatility. As MOF research has progressed, highly functionalised materials have become desirable for specific applications, and in many cases the limitations of direct synthesis have been realised. This has resulted in the search for alternative synthetic routes, with postsynthetic modification (PSM), a term used to collectively describe the functionalisation of pre-synthesised MOFs whilst maintaining their desired characteristics, becoming a topic of interest. Advances in the scope of reactions performed are reported regularly; however reactions requiring harsh conditions can result in degradation of the framework. Zirconium-based MOFs present high chemical, thermal and mechanical stabilities, offering wider opportunities for the scope of reaction conditions that can be tolerated, which has seen a number of successful examples reported. This microreview discusses pertinent examples of PSM resulting in enhanced properties for specific applications, alongside fundamental transformations, which are categorised broadly into covalent modifications, surface transformations, metalations, linker and metal exchange, and cluster modifications

The Gerby Gopakumar-Mari\~no-Vafa Formula

We prove a formula for certain cubic $\Z_n$-Hodge integrals in terms of loop Schur functions. We use this identity to prove the Gromov-Witten/Donaldson-Thomas correspondence for local $\Z_n$-gerbes over \proj^1.Comment: 43 pages, Published Versio

Dense gap-junction connections support dynamic Turing structures in the cortex

The recent report by Fukuda et al [1] provides convincing evidence for dense gap-junction connectivity between inhibitory neurons in the cat visual cortex, each neuron making 60 +/- 12 gap-junction dendritic connections with neurons in both the same and adjoining orientation columns. These resistive connections provide a source of diffusive current to the receiving neuron, supplementing the chemical-synaptic currents generated by incoming action-potential spike activity. Fukuda et al describe how the gap junctions form a dense and homogeneous electrical coupling of interneurons, and propose that this diffusion-coupled network provides the substrate for synchronization of neuronal populations. To date, large-scale population-based mathematical models of the cortex have ignored diffusive communication between neurons. Here we augment a well-established mean-field cortical model [2] by incorporating gap-junction-mediated diffusion currents, and we investigate the implications of strong diffusive coupling. The significant result is the model prediction that the 2D cortex can spontaneously generate centimetre-scale Turing structures (spatial patterns), in which regions of high-firing activity are intermixed with regions of low-firing activity (see Fig. 1). Since coupling strength decreases with increases in firing rate, these patterns are expected to exchange contrast on a slow time-scale, with low-firing patches increasing their activity at the expense of high-firing patches. These theoretical predictions are consistent with the slowly fluctuating large-scale brain-activity images detected from the BOLD (blood oxygen-level-dependent) signal [3]

'Penny banks' in Glasgow, 1850-1914

This paper explores the extent and nature of ‘Penny bank’ saving in Glasgow during the second half of the nineteenth century. Penny banks existed as part of the network of philanthropic organisations in the quintessential industrial city, and they were frequented by the poorer sections of the working class – those for whom saving represented a difficult and occasionally sacrificial effort. They were a voluntary and individualist decision to engage in saving, in contrast to the mutual organisations, such as friendly and industrial welfare societies which also proliferated in this period. The enormous success of penny banks in Glasgow, and throughout the United Kingdom, is powerful evidence that a great deal of saving was happening, even amongst the poorest sections of society. Careful examination of the activities of two penny banks suggests that they operated both as short-term liquidity stores and as vehicles for longer-term and larger-amount savings

A right to a risk filled life : understanding and analysis of the risk discourse for consumers in mental health : a thesis presented in partial fulfilment of the requirements for the degree of Master of Arts in Social Policy at Massey University

This thesis documents the perspective and discourse of risk for eleven people who identify as someone with lived experiences of mental illness and mental health service use. The thesis followed a participatory methodology and involved consumers in both formulating and conducting the research. Following qualitative research methods some key findings included that there was a correlation between increased exposures to risk during increased acute unwellness; increased exposure to risk because of service use; that the people interviewed wished to have some control and self-responsibility in managing risks, that life was full of risk and that this was quite usual; and importantly, that risk was experienced as a stigmatizing phenomena for the participants. The stigma of risk was such that participants had to develop significant coping strategies to manage others perceptions and deal with the experience of having normal behaviours and emotions considered by others as abnormal and risky. The thesis makes recommendations for consumers, services and mental health service staff and for policy makers. Many of the recommendations consider how understandings of risk and approaches to risk management could alter or increase consumer safety and wellbeing. The thesis additionally includes an analysis of the participatory process that was followed with recommendations made encouraging an increased frequency and strengthened quality of consumer participation in research