880 research outputs found
Constitutional Law - First Amendment - Freedom of Expression - Public Indecency
The United States Supreme Court held that the enforcement of Indiana\u27s public indecency statute to require dancers to wear G-strings and pasties at adult entertainment establishments did not violate the First Amendment.
Barnes v Glen Theatre, Inc., ___ US ___, 111 S Ct 2456 (1991)
Design and performance of precast concrete structures
A precast concrete structural system offers many advantages over in-situ casting. For example, greater control over the quality of materials and workmanship, improved health and safety (with casting carried out at ground level rather than at height) and cost efficiency (with standard forms continually re-used) are all realised through the off-site production of structural elements. As a result, a large body of research has been conducted into their performance, with many national codes of practice also devoting specific sections to design and detailing. However, contemporary design practice has been shown to not always correctly reflect the findings of published experimental studies.
Concrete technology is continually evolving, as is the industry s knowledge of how to model and predict the behaviour of the resulting structural components. Using such understanding to design and justify the more efficient, cost-effective or flexible manufacture of precast components can offer a key commercial advantage to a precast manufacturer. In this context, the numerical and experimental investigations undertaken as part of this study have been specifically focussed on quantifying the advantages of utilising beneficial alternatives. Specifically the research has looked at improvements in concrete mixes, lightweight aggregates and reinforcing strategies, for precast structural elements required to transfer loads both vertically and horizontally. However, because of the non-standard solutions considered, different approaches have been used to demonstrate their suitability.
Towards this goal, an alternative assessment strategy was devised for slender precast concrete panels with central reinforcement. The procedure was found to lead to design capacities that are in good agreement with actual experimental findings and should thus result in future manufacturing efficiency. The method can also be used for alternative concrete types and reinforcement layouts.
Fresh and early-age material characteristics of self-compacting concrete mixes with a partial or complete replacement of traditional gravel and sand constituents with lightweight alternatives were investigated. This was done to demonstrate the feasibility of their use for the manufacture of large scale structural components, with clear benefits in terms of lifting and transportation.
A computational push-down procedure was utilised to demonstrate the potential unsuitability of current tying regulations for avoiding a progressive collapse event in precast framed structures. The findings are considered to be of particular significance for these structures due to the segmental nature of the construction and the associated inherent lack of structural continuity
The Growth of VEX Robotics Competitions in Utah and the Rocky Mountain Region
During the 2008-2009 school year, the Utah State University (USU) VEX Robotics team competed for the first time in the VEX Robotics World Championship. VEX annually hosts this championship to identify and award the best middle school, high school, and college robotics teams. A major goal of the USU VEX Robotics Team, through a partnership with the Rocky Mountain NASA Space Grant Consortium (RMNSPC) is to promote middle and high school students in Utah and the Rocky Mountain Region to develop an interest in science, technology, engineering, and mathematics (STEM) through encouraging and assisting students and schools through competitive robotics. This paper discusses the goals and results of the efforts of the USU VEX Robotics Team over the past four years
Synthesis and alkyne-coupling chemistry of cyclomanganated 1- and 3-acetylindoles, 3-formylindole and analogues
The syntheses are reported of new cyclomanganated indole derivatives (1-acetyl-ÎșO-indolyl-ÎșC2)dicarbonylbis(trimethylphosphite)manganese (2), (1-methyl-3-acetyl-ÎșO-indolyl-ÎșC2)tetracarbonylmanganese (4), (3-formyl-ÎșO-indolyl-ÎșC2)tetracarbonylmanganese (5a) and (1-methyl-3-formyl-ÎșO-indolyl-ÎșC2)tetracarbonylmanganese (5b). The unusually complicated crystal structure of 5b has been determined, the first for a cyclomanganated aryl aldehyde.
The preparations of a mitomycin-related pyrrolo-indole and related products by thermally promoted and oxidatively (Me3NO) initiated alkyne-coupling reactions of the previously known complex (1-acetyl-ÎșO-indolyl-ÎșC2)tetracarbonylmanganese (1) are reported for different alkynes and solvents. X-ray crystal structures are reported for the dimethyl acetylenedicarboxylate coupling product of 1 (dimethyl 1-methyl-l-hydroxypyrrolo[1,2a]-indole-2,3-dicarboxylate; 6a), and an unusually-cyclised triple insertion product 8 from the coupling of acetylene with 4, in which a cyclopentadiene moiety is η3-allyl-coordinated to Mn through only one double bond and an exocyclic carbon, but which rearranges on heating to an η5-cyclopentadienyl complex
Design methodologies for one way spanning eccentrically loaded minimally or centrally reinforced pre-cast RC panels
AbstractThis paper examines and evaluates design methodologies applicable to pre-cast reinforced concrete (RC) panels subjected to eccentric axial load. Theoretical capacities derived from existing regulatory guidance are compared against those determined from experimental investigations, showing that slender RC walls have load capacities significantly higher than the estimates based on current design equations.A simple computational procedure incorporating lumped plasticity is presented and experimentally validated. It is shown that by utilising a non-linear hinge at the critical cross section, it is possible to effectively simulate the buckling response of the slender walls considered with a modest computational effort. The proposed design strategy emerges as a viable alternative to traditional methodologies by being able to capture the main effects of geometrical and material nonlinearities. It is therefore suggested that this approach, used in conjunction with a probabilistic, semi-empirical design procedure, will lead to design capacities more representative of actual experimental findings
Design methodologies for one way spanning eccentrically loaded minimally or centrally reinforced pre-cast RC panels
This paper examines and evaluates design methodologies applicable to pre-cast reinforced concrete (RC) panels subjected to eccentric axial load. Theoretical capacities derived from existing regulatory guidance are compared against those determined from experimental investigations, showing that slender RC walls have load capacities significantly higher than the estimates based on current design equations.A simple computational procedure incorporating lumped plasticity is presented and experimentally validated. It is shown that by utilising a non-linear hinge at the critical cross section, it is possible to effectively simulate the buckling response of the slender walls considered with a modest computational effort. The proposed design strategy emerges as a viable alternative to traditional methodologies by being able to capture the main effects of geometrical and material nonlinearities. It is therefore suggested that this approach, used in conjunction with a probabilistic, semi-empirical design procedure, will lead to design capacities more representative of actual experimental findings. © 2013 The Authors
Influence of steel fibres, used in conjunction with unconfined rebar configurations, on the structural performance of precast elements
A joint experimental and computational research program has been carried out to
demonstrate the potential benefits of using Steel Fibre Reinforcement (SFR) within the design and
manufacture of two key structural elements, namely slender walls and thin lintels with dapped ends,
often adopted within the pre-cast concrete industry. The investigations specifically focus on the
advantages of utilising SFR in conjunction with traditional bar reinforcement in an unconfined layout.
This configuration allows cost savings in regards to precast manufacture and enjoys good
performance in terms of durability and fire resistance, though its use is currently limited by the brittle
mode of failure. The paper sets out to prove that the inclusion of SFR within the concrete matrix is
capable of inducing a more ductile response in the structural members under consideration, therefore
potentially making it possible to justify the adoption of such unconfined layouts in the design practice
Preventative medical care in remote Aboriginal communities in the Northern Territory: a follow-up study of the impact of clinical guidelines, computerised recall and reminder systems, and audit and feedback
MIDDLESEX HOUSE,34-42 CLEVELAND ST, LONDON,
ENGLAND, W1T 4L
Antibacterial compounds
The present invention relates to certain compounds of formula (I) wherein - Ar is (Ar1) or (Ar2) and to their uses as antibacterial agents. The invention further relates to methods of treatment of bacterial infection with such compounds, optionally in combination with other antimicrobials and to compositions and pharmaceutical formulations containing such compounds. The invention additionally relates to coatings containing such compounds and to items having such coatings
Computing covariant vectors, Lyapunov vectors, Oseledets vectors, and dichotomy projectors: a comparative numerical study
Covariant vectors, Lyapunov vectors, or Oseledets vectors are increasingly
being used for a variety of model analyses in areas such as partial
differential equations, nonautonomous differentiable dynamical systems, and
random dynamical systems. These vectors identify spatially varying directions
of specific asymptotic growth rates and obey equivariance principles. In recent
years new computational methods for approximating Oseledets vectors have been
developed, motivated by increasing model complexity and greater demands for
accuracy. In this numerical study we introduce two new approaches based on
singular value decomposition and exponential dichotomies and comparatively
review and improve two recent popular approaches of Ginelli et al. (2007) and
Wolfe and Samelson (2007). We compare the performance of the four approaches
via three case studies with very different dynamics in terms of symmetry,
spectral separation, and dimension. We also investigate which methods perform
well with limited data
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