Concrete Thinking for Sculpture

This article proposes to explore the variegated plays of concrete as a travelling concept through four specific examples, viewed from the locality of the Yorkshire Sculpture Triangle in 2015. It will be argued that ‘concrete’ makes possible a triangulated reading practice in, of and for sculpture. The first example looks to the use of concrete, as a material, in some of the ‘technical’ experiments of Henry Moore, from the 1920s-1930s. The second example is the only public concrete sculpture by Barbara Hepworth on record, entitled Turning Forms. This is a kinetic work which was commissioned for the Festival of Britain in 1951. The psychic registrations of form-in-concrete will be explored through the aesthetic reception and understanding of these works. The third example examines the interplay between abstraction and concretion in a work of structural engineering: the Arqiva transmission tower on Emley Moor. This structure is a working utilitarian model of the telecommunications industry which took hold in the 1960s and 1970s. It is also a sculptural monument in a landscape of other design ‘types’. The fourth example considers the recent display of Lygia Clark’s Bichos at the Henry Moore Institute, Leeds, in 2014-2015. Bicho Pássaro do Espaço (‘Creature Passing through Space’) (1960) reveals a particular translation between concrete thinking and concrete experience. These examples call upon the semantics of the concrete as a thought process and will track a journey into a region marked by three interconnected points: the concrete specificity in the material works selected, the broader field of concrete forms within which the sculptural may sit and the philosophical/aesthetic language of concrete for sculpture

Factors Affecting Habitat Quality for Wintering Wood Thrushes in a Coffee Growing Region in Honduras

Amongst the diversity of taxa that occur in the Neotropics, 200 migratory bird species that breed in temperate North America can be found. Many of these populations have seen significant declines since the 1960s. The Wood Thrush, Hylocichla mustelina, is one such species. Shade coffee and other agroforestry practices show potential for benefiting migratory species, but the quality of coffee habitat and optimal habitat characteristics for Wood Thrushes remain unknown. I surveyed a spatially complex, agricultural landscape in Honduras outside the recognized winter range of the Wood Thrush and radio-tagged 46 individuals within rustic coffee farms during the winters of 2012 and 2013. I used telemetry data to calculate metrics of habitat quality based on survival and persistence while also collecting detailed vegetation measurements across the landscape and within each home-range. Mixed-effects models were used to explore the relationship of survival, transience, movement, and home-range size to habitat class and microhabitat variables. Estimates for all four habitat quality metrics fell within the range of previous studies and were significantly related to habitat attributes. Structure, edge habitat, and shade coffee played a key role determining habitat quality. The variables associated with higher habitat quality in this study suggest that rustic coffee farms have potential to support wintering wood thrush populations. However, estimates of survival may be overly optimistic in the presence of transients, transforming highly fragmented landscapes into winter sinks. This study highlights several gaps in current scientific knowledge about some of the most essential questions of Wood Thrush winter ecology

Probit models for capture-recapture data subject to imperfect detection, individual heterogeneity and misidentification

As noninvasive sampling techniques for animal populations have become more popular, there has been increasing interest in the development of capture-recapture models that can accommodate both imperfect detection and misidentification of individuals (e.g., due to genotyping error). However, current methods do not allow for individual variation in parameters, such as detection or survival probability. Here we develop misidentification models for capture-recapture data that can simultaneously account for temporal variation, behavioral effects and individual heterogeneity in parameters. To facilitate Bayesian inference using our approach, we extend standard probit regression techniques to latent multinomial models where the dimension and zeros of the response cannot be observed. We also present a novel Metropolis-Hastings within Gibbs algorithm for fitting these models using Markov chain Monte Carlo. Using closed population abundance models for illustration, we re-visit a DNA capture-recapture population study of black bears in Michigan, USA and find evidence of misidentification due to genotyping error, as well as temporal, behavioral and individual variation in detection probability. We also estimate a salamander population of known size from laboratory experiments evaluating the effectiveness of a marking technique commonly used for amphibians and fish. Our model was able to reliably estimate the size of this population and provided evidence of individual heterogeneity in misidentification probability that is attributable to variable mark quality. Our approach is more computationally demanding than previously proposed methods, but it provides the flexibility necessary for a much broader suite of models to be explored while properly accounting for uncertainty introduced by misidentification and imperfect detection. In the absence of misidentification, our probit formulation also provides a convenient and efficient Gibbs sampler for Bayesian analysis of traditional closed population capture-recapture data.Comment: Published in at http://dx.doi.org/10.1214/14-AOAS783 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org

Uncoverings on graphs and network reliability

We propose a network protocol similar to the $k$-tree protocol of Itai and Rodeh [{\em Inform.\ and Comput.}\ {\bf 79} (1988), 43--59]. To do this, we define an {\em $t$-uncovering-by-bases} for a connected graph $G$ to be a collection $\mathcal{U}$ of spanning trees for $G$ such that any $t$-subset of edges of $G$ is disjoint from at least one tree in $\mathcal{U}$, where $t$ is some integer strictly less than the edge connectivity of $G$. We construct examples of these for some infinite families of graphs. Many of these infinite families utilise factorisations or decompositions of graphs. In every case the size of the uncovering-by-bases is no larger than the number of edges in the graph and we conjecture that this may be true in general.Comment: 12 pages, 5 figure

The Croatian Message of the International Theatre Day

Hoćemo li se mi, umjetnici arena i pozornica, povoditi za sterilnim potrebama tržišta ili ćemo zgrabiti moć koju imamo, moć da stvorimo čist prostor u srcima i umovima društva, da okupimo ljude oko nas, da ih nadahnemo, očaramo i informiramo, i time stvorimo svijet nade i iskrene suradnje?Are we, the artists of arenas and stages, conforming to the sanitized demands of the market, or seizing the power that we have: to clear a space in the hearts and minds of society, to gather people around us, to inspire, enchant and inform, and to create a world of hope and open-hearted collaboration

Lorentz Violation with an Antisymmetric Tensor

Field theories with spontaneous Lorentz violation involving an antisymmetric 2-tensor are studied. A general action including nonminimal gravitational couplings is constructed, and features of the Nambu- Goldstone and massive modes are discussed. Minimal models in Minkowski spacetime exhibit dualities with Lorentz-violating vector and scalar theories. The post-Newtonian expansion for nonminimal models in Riemann spacetime involves qualitatively new features, including the absence of an isotropic limit. Certain interactions producing stable Lorentz-violating theories in Minkowski spacetime solve the renormalization-group equations in the tadpole approximation

Vanguard, Volume I

https://digitalcommons.northgeorgia.edu/vanguard/1000/thumbnail.jp

A Thesis in Petroleum Geosciences

>Magister Scientiae - MScThe North West Shelf of Australia is a prolific gas province. The Thebe Gas Field is situated within the northern central Exmouth Plateau in the Northern Carnarvon Basin. The Exmouth Plateau is a submerged continental block whose culmination lies at about 800m below sea level. The seismic data used for this study is the HEX07B survey which was conducted in 2007. The objective of this study was to interpret all available seismic data, of which six horizons were picked, generating two-way-time structure maps and an average velocity map, performing depth conversion and generating various depth maps. The horizons picked were the economic basement, Triassic Mungaroo, Murat Siltstone, Muderong Shale, Gearle Siltstone and the Sea Bed. The horizon of interest was the Triassic Mungaroo Formation and therefore it was the only horizon with an average velocity map. The seismic sections were used in conjunction with the structure maps generated to identify possible locations for appraisal wells to be drilled. Prospect X was identified on the basis of amplitude and structure present within the Triassic Mungaroo Formation. The final task was to calculate the volumes present and a Monte-Carlo Simulation was used for this. The results obtained showed that Prospect X has a good petroleum system in place. The Mungaroo Formation is identified as being the possible source and reservoir rock, the Muderong Shale is the seal, structural traps are provided by large fault block and faults provided the migration pathways from the source in to the reservoir. The volumes were calculated using three areas identified on the structure maps by three closing contours. These areas are the P90, P50, P10 and the volumes for the gas in place were as follows, P90 = 893 Bcf (0.9Tcf), P50 = 1128 Bcf (1.1 Tcf), P10 = 1367 Bcf (1.4Tcf). Using the various parameters the probability of success for Prospect X was calculated to be 20%

Efficacy of Incident Management Teams and emergent multi-organizational networks in the implementation of the Incident Command System

The Incident Command System (ICS) exists as the nationwide standard for onsite incident management, as called for under the National Incident Management System (NIMS). However, the effectiveness of ICS is debated, both for its systemic efficacy as a response model and for its inconsistent application. Since the development of ICS, individual responders have trained to work together as Incident Management Teams (IMTs). Even though little research exists on IMTs, their use has increased widely since the release of the NIMS. The alternative to IMTs is implementing ICS through a collection of individuals in an ad hoc manner, often referred to as an Emergent MultiOrganizational Network (EMON). This study strives to determine the impact of IMTs versus EMONs on the effectiveness of emergency and disaster response. It is hypothesized that the use of IMTs will increase the perceived effectiveness of a response, specifically in the application of the Incident Command System. The population for this study is emergency and disaster responders at large, regardless of disciplinary or jurisdictional demographics. The sample population is individual responders comprising both members and non-members of Incident Management Teams. The responders were from across the four state area of FEMA Region VII (Iowa, Kansas, Missouri and Nebraska). Non-IMT responders serve as a control group of EMONs to determine whether IMT membership has any effect on response. This study is limited in that it is not based on specific responses. Instead, respondents provide feedback to a survey based on what their normal actions were for their last biggest response