Probabilistic latent semantic analysis as a potential method for integrating spatial data concepts

In this paper we explore the use of Probabilistic Latent Semantic Analysis (PLSA) as a method for quantifying semantic differences between land cover classes. The results are promising, revealing ‘hidden’ or not easily discernible data concepts. PLSA provides a ‘bottom up’ approach to interoperability problems for users in the face of ‘top down’ solutions provided by formal ontologies. We note the potential for a meta-problem of how to interpret the concepts and the need for further research to reconcile the top-down and bottom-up approaches

Phosphate acceptance map: A novel approach to match phosphorus content of biosolids with land and crop requirements

Phosphorus is a key irreplaceable nutrient that plays a major role in crop nutrition. The mineral form of phosphorus fertiliser is a mined resource and its supply comes predominantly from geopolitically sensitive parts of the world. A renewable source of phosphorus such as biosolids therefore offers a sustainable option. Nevertheless, continuous application of biosolids needs to be managed to ensure that soil is not saturated with nutrients which can then become a cause for concern in terms of enrichment of water bodies in the event of an erosion. Existing field trials have demonstrated the efficacy of biosolids as phosphorus fertiliser to meet crop demand whilst maintaining an environmentally safe amount in the soil. However, field trials are expensive, and an alternative would be a geospatial tool that builds on such information to act as a decision support tool to determine suitability of land to receive biosolids whilst ensuring that phosphorus levels are in environmentally safe limits. Thus, a novel and evidence-based decision support method for assessing land suitability for biosolids application at a national scale known as the Phosphate Acceptance Map (PAM) is described here. It provides a sound basis for addressing this need, layering over the model the means to capture a range of realistic scenarios, developed with industry practitioners, to allow exploration of the consequences of different land management strategies. The research method has involved the development and application of a modelling approach for phosphate acceptance, drawing from a collation of the core geographical and descriptive data themes required. These data describe both the environmental characteristics of the land under assessment, as well as the expression of nominal stakeholder values and protected areas. In considering the methods, it may be noted that the modelling drew upon key empirical data themes as a pragmatic approach. A number of key national datasets have been utilised such as the National Soil Map (Natmap), the ‘National Soil Inventory’ (NSI), geology and land use, as well as topography and prevailing climatic data. Demographic data was used to calculate potential arising nationally which was coupled together in the context of fertiliser recommendations. The issues addressed in the PAM modelling span borders and thus, where the data required is forthcoming, the methods demonstrated also have the potential to support wider application in other national contexts

Representing miners in arrangements for health and safety in coalmines: a study of current practice

This article explores the operation of regulatory provisions for worker occupational health and safety (OHS) representation in coalmining in Australia. Using data on inspections, combined with qualitative interviews, it looks at what occurs in a generally hostile labour relations climate and what supports or constrains representation in this scenario. It finds evidence of the engagement of worker representatives with serious risks in coalmining. By using the various means with which they are provided by regulatory measures, they make a significant contribution to the operation of the regulatory strategy of enforced self-regulation of OHS management. They are successful in doing so despite the unsupportive climate of labour relations in which they are frequently situated. However, the study poses questions concerning the fit of this approach with increasingly dominant versions of OHS management pursued by large and globally active corporations and discusses some implications of this for policy and further study

Immigration and the access to social housing in the UK

This paper investigates the impact of immigration on the probability of being in social housing in the UK. In recent years immigrant households are slightly more likely than natives to be in social housing but once one controls for relevant household characteristics immigrants are significantly less likely to be in social housing than natives. However, there has been change over time – the immigrant penalty has fallen over time probably because of changes in allocation rules. Overall we find that the rising number of immigrants and the change in the allocation rules can explain about one-third of the fall in the probability of being in social housing with two-thirds being the result of the fall in the social housing stock

A study of the role of workers' representatives in health and safety arrangements in coal mines in Queensland

Coal mining is a dangerous industry which demands a strong emphasis on ensuring the protection of miners' health, safety and well being. This study investigates the role and effectiveness of health & safety reps in Queensland Coal Mines and was undertaken by the Cardiff Work Environment Research Centre at Cardiff University in Wales, UK. The aim of the study is to contribute further knowledge of the effectiveness of the role of worker reps in managing those risks. Early mining disasters resulting in the deaths of many mineworkers highlighted the need for unions to take a proactive role in ensuring their own safety. Originally known as check inspectors, they were first appointed by unions in the Hunter Valley in the 1870s, and in Queensland they gained statutory recognition in 1915. The study, which can be downloaded as the full report or in summary form, is specifically focused on the experience of representative participation in Queensland coal mines

Alternating Subplinian and phreatomagmatic phases during the construction of a phonolitic maar-diatreme volcano (Caldera del Rey, Tenerife, Canary Islands)

The Early Pleistocene, well exposed, Caldera del Rey maar-diatreme volcano, Tenerife, Canary Islands was constructed during a ∼ VEI 4 phonolitic eruption that involved two cycles of magmatic-to-phreatomagmatic activity and resulted in two overlapping craters aligned NE-SW. Magmatic phases fed unsteady Subplinian eruption columns that reached 8–12 km altitude and dispersed tephra to the west and southwest of the volcano and shed pyroclastic density currents. Phreatomagmatic phases, driven by explosive interactions between magma and groundwater, constructed an extensive tephra ring via deposition from ballistic curtains, pyroclastic density currents, and tephra fall. Near-optimal-scaled depth phreatomagmatic explosions (strong and/or shallow) excavated a substantial diatreme beneath the north crater and constructed a substantial tephra ring. This abruptly transitioned to deeper-than-optimal scaled depth explosions (weak and/or deep) that erupted mostly fine ash which was dispersed by dilute pyroclastic density currents and fallout and filled the south crater. At distances of >4 km from the volcano, over a metre of ash and pumice accumulated during the phreatomagmatic phases. The Caldera del Rey volcano provides an instructive study on how interaction between ascending felsic magma and groundwater can modify Subplinian eruptions

Happiness and longevity in the United States

This is the first study to our knowledge to examine the relationship between happiness and longevity among a nationally representative sample of adults. We use the recently-released General Social Survey-National Death Index dataset and Cox proportional hazards models to reveal that overall happiness is related to longer lives among U.S. adults. Indeed, compared to very happy people, the risk of death over the follow-up period is 6% (95% CI 1.01 – 1.11) higher among individuals who are pretty happy and 14% (95% CI 1.06 – 1.22) higher among those who are not happy, net of marital status, socioeconomic status, census division, and religious attendance. This study provides support for happiness as a stand-alone indicator of well-being that should be used more widely in social science and health research

Experimental characterization of universal one-way quantum computing

We report the characterization of a universal set of logic gates for one-way quantum computing using a four-photon 'star' cluster state generated by fusing photons from two independent photonic crystal fibre sources. We obtain a fidelity for the cluster state of 0.66 ± 0.01 with respect to the ideal case. We perform quantum process tomography to completely characterize a controlled-NOT, Hadamard and T gate all on the same compact entangled resource. Together, these operations make up a universal set of gates such that arbitrary quantum logic can be efficiently constructed from combinations of them. We find process fidelities with respect to the ideal cases of 0.64 ± 0.01 for the CNOT, 0.67 ± 0.03 for the Hadamard and 0.76 ± 0.04 for the T gate. The characterization of these gates enables the simulation of larger protocols and algorithms. As a basic example, we simulate a Swap gate consisting of three concatenated CNOT gates. Our work provides some pragmatic insights into the prospects for building up to a fully scalable and fault-tolerant one-way quantum computer with photons in realistic conditions

Characterisation of a new VUV beamline at the Daresbury SRS using a dispersed fluorescence apparatus incorporating CCD detection

The design and performance of a new normal incidence monochromator at the Daresbury Synchrotron Radiation Source, optimised for experiments requiring high flux of vacuum-UV radiation, are described. The re-developed beamline 3.1, based on the Wadsworth design of monochromator, is the source of tunable vacuum-UV photons in the range 4 – 31 eV, providing over two orders of magnitude more flux than the vacuum-UV, Seya monochromator in its previous manifestation. The undispersed and dispersed fluorescence spectra resulting from photoexcitation of N$_2$, CO$_2$, CF$_4$ and C$_6$F$_6$ are presented. Emitting species observed were N$_2^+$ B$^2\Sigma_u^+$ - X$^2\Sigma_g^+$, CO$_2^+$ A$^2\Pi_u$ - X$^2\Pi_g$ and B$^2\Sigma_u^+$ - X$^2\Pi_g$, CF$_4$$^+$ C$^2$T$_2$ - X$^2$T$_1$ and C$^2$T$_2$ - A$^2$T$_2$, CF$_3$* $^2$A$^’_2$ - $^2$A$^”_2$, and C$_6$F$_6^+$ B$^2$A$_{2u}$ - X$^2$E$_{1g}$. A CCD multi-channel detector has significantly reduced the time period needed to record dispersed fluorescence spectra with a comparable signal-to-noise ratio

University of Denver John Evans Study Report

Universities are dedicated to the discovery and dissemination of knowledge. They are conservators of humanity\u27s past. They cherish their own pasts, honoring forbears with statues and portraits and in the names of buildings. To study or teach at a [university] is to be a member of a community that exists across time, a participant in a procession that began centuries ago and that will continue long after we are gone. If an institution professing these principles cannot squarely face its own history, it is hard to imagine how any other institution, let alone our nation, might do so. -Report of the Brown University Steering Committee on Slavery and Justice, page 6, 2006. The University of Denver was founded in 1864 by John Evans. John Evans had been appointed by President Abraham Lincoln in 1862 to be the second territorial governor of Colorado. He served in that capacity until 1865. This committee is inquiring into the nature of John Evans’ involvement in the political and economic processes that led to the appropriation of Indian Lands in Colorado and, more specifically, to the 1864 killing of Cheyenne and Arapahoe villagers at Sand Creek. It consists of faculty and staff from DU and other institutions. Given the impending 150-year anniversaries of the Sand Creek Massacre and DU’s founding, it is appropriate to evaluate John Evans’ place in the university’s history and the ways in which we recognize his contributions. The committee is working in tandem with a similarly constituted committee at Northwestern University, which John Evans co-founded in 1853. The NU and DU committees will coordinate research and share information. The DU committee will generate a report of our findings and a set of recommendations for actions that the university should take as a result of our report