Associating places: strategies for live, site specific, sound art performance

Claims for originality in this thesis lie in bringing together many different disciplines in art, music, sound studies and performance. The methodology, contextually indebted to the dialogues of site specific art, performance, and sound improvisation, has emerged as a multi-disciplinary one, informed in part by the study of those artists from the 1960s onwards who actively sought to resist the gallery system. The practice has driven the thesis in developing and continuously testing the requirement to respond uniquely to chosen sites. By using relevant references, instruments, and sonified materials, a compulsion to convey something of the particularity of the site’s associations through sound, is performed on site. In the course of considering the wider implications of a site through both the sound performances and the critical writing, I propose that there are essentially three aspects to identify when working with sound on site. I define these as: the actual the activated the associative The first aspect describes what is essentially inherent to the place, the second what can be encouraged to be ‘sounded’ through physical intervention, and the third outlines and forms what I have coined as the wider material of the site. This term draws on any relevant aspects of the social, physical, historical, anecdotal, and aural associations that a site may proffer. However, it is the notion of the associative that primarily informs the research by providing a methodology for the practice and in proposing a new paradigm of a live, site specific, performed, sound art work. The twenty or so works in the portfolio undertaken hitherto have existed not only as live performances but also in virtual and physical documentation, critical 4 analyses, and in the potential possibilities brought to the form by the response of others. By addressing this new taxonomy of approach in defining the actual, the activated and the associative as a kind of aural ground to the site (borrowing a term from painting), significant live sound art works have been developed to temporarily inhabit a space by exploring this latent material of the site

The social construction of formal adult cautioning by police: an ethnographic study

Since its official introduction in England and Wales during 1985, the formal cautioning of adult offenders by police has grown to become a significant mechanism by which certain offenders are diverted from the criminal justice system. Currently some 30% of adult male offenders and 45% of adult female offenders arrested by the police are dealt with in this way. Cautioning is a procedural mechanism by which the police, contingent upon their adherence to the provisions of national guidelines, can elect to deal with certain criminal cases by means other than prosecution. Instead, they can choose to 'divert' the suspect from the court system by administering a formal caution; signed for by the suspect; often accompanied by verbal censure by a senior police officer; recordable on centralised police criminal indices; subject to the allocation of a CRO (criminal records office) number and citable in any subsequent court proceedings as a previous finding of guilt. The official rhetoric of cautioning espouses the virtues of benevolence through the provision of a second-chance for first time and petty offenders, allowing them to turn away from further offending, as well as efficiency through the speedy and timely management and disposal of cases not considered to be in the public interest to prosecute. But the burgeoning use of formal cautioning by the police has created problems of inconsistency, inequity and misapplication through repeat cautioning and its inappropriate use in cases of serious crime such as rape and murder. The fundamental principles of cautioning have also been criticised for eroding a suspect's due process rights such as the right to trial, the right to have prosecution evidence rigorously tested through an adversarial process that secures the right to legal counsel, a process that demands proof beyond reasonable doubt and which is subject to external review through an appeals process. These safeguards are almost completely absent with cautioning. Furthermore, the mechanisms by which police cautioning decisions are regulated have also been found wanting following research that suggests that the national guidelines are poorly defined, non-prioritised and provide for excessive latitude for police decision makers. This research project is an investigation into both the theory and practice of formal adult cautioning by the police. At its centre is a two-year covert participant observational study of the police work-world and of the ways in which cautioning, as intentional social action, draws meaning from and can be located within this occupational culture. Building upon a comprehensive review of available literature and consideration of the methodological and ethical issues created by the research, the thesis sets out to examine the true nature of the cautioning of adult offenders by the police in its natural setting - the custody office - and uses data drawn from officer and suspect interactions as the basis for a detailed analysis of how, why and by whom cautioning decisions actually come to be made. From this analysis conclusions have been drawn and recommendations made concerning how this disposal method might develop in the future and how existing problems might be overcome leading to a new, more consistent and equitable system of cautioning

The use of embedded sensors for the monitoring of adhesive joints in marine environments

A copolymer incorporating polyaniline was used as a sensing medium in the construction of a resistance based humidity sensor. Aniline monomer was polymerised in the presence of poly (butyl acrylate / vinyl acetate) and a copolymer containing polyaniline emeraldine salt was obtained. The sensing medium was then developed by redissolving 1-2 w/w% of the resulting polymer residue in dichloromethane to produce a processable polymer blend solution. Some of this polymer residue was also de-doped in a solution of ammonia, and then washed with distilled water until the waste water had a neutral pH. This residue was then redissolved at 1-2 w/w% in dichloromethane to produce a second processable polymer blend this time containing polyaniline emeraldine base. The final sensor design utilised 125μm polyester insulated platinum wire as conducting electrodes that were dip coated in the emeraldine salt copolymer solution and allowed to dry in a desiccator. The sensor was then dip-coated in a protective barrier layer of the emeraldine base copolymer to prevent over-oxidation and/or de-protonation of the emeraldine salt sensing medium under this coating. The sensors had an overall final thickness of less than 150μm and showed high sensitivity to humidity, low resistance, and good reversibility without hysteresis. Sensors were monitored for 2-probe resistance changes when in contact with water. Calibration curves for each sensor were produced to convert the resistance reading to mass uptake of water. Individual sensors were embedded within Aluminium 5083 / Araldite 2015 adhesive joints to monitor mass uptake of water when exposed to marine environments. Correlations between mass uptake of water and joint strength were made. There are various advantages of such a sensor design. Polymer based thin film humidity sensors have the advantage that the high processability of the material allows for simple fabrication of a range of geometries including smaller sensor designs. The ease of processing gives a low cost sensor, whilst the small size and good mechanical properties gives a robust sensor which has the flexibility to be able to be used in applications where dynamic stresses and strains are encountered. Such sensors may find uses in a number of areas including electronic textiles, food/ electronics packaging and corrosion detection

The Texas Petawatt Laser And Current Experiments

The Texas Petawatt Laser is operational with experimental campaigns executed in both F/40 and F3 target chambers. Recent improvements have resulted in intensities of >2x10(21) W/cm(2) on target. Experimental highlights include, accelerated electron energies of >2 GeV, DD fusion ion temperatures >25 keV and isochorically heated solids to 10-50 eV.Physic

Tri-layer polymer actuators with variable dimensions

The ability of conducting polymer actuators to convert electrical energy into mechanical energy is influenced by manyfactors ranging from the actuators physical dimensions to the chemical structure of the conducting polymer. In order toutilise these actuators to their full potential, it is necessary to explore and quantify the effect of such factors on theoverall actuator performance. The aim of this study is to investigate the effect of various geometrical characteristics suchas the actuator width and thickness on the performance of tri-layer polypyrrole (PPy) actuators operating in air, asopposed to their predecessors operating in an appropriate electrolyte. For a constant actuator length, the influence of theactuator width is examined for a uniform thickness geometry. Following this study, the influence of a varied thicknessgeometry is examined for the optimised actuator width. The performance of the actuators is quantified by examination ofthe force output, tip displacement, efficiency as a function of electrical power and mechanical power, and time constantfor each actuator geometry. It was found that a width of 4mm gave the greatest overall performance without curlingalong the actuator length (which occurred with widths above 4mm). This curling phenomenon increased the rigidity ofthe actuator, significantly lowering the displacement for low loads. Furthermore, it was discovered that by focussing ahigher thickness of PPy material in certain regions of the actuators length, greater performances in various domainscould be achieved. The experimental results obtained set the foundation for us to synthesize PPy actuators with anoptimised geometry, allowing their performance to reach full potential for many cutting applications

Nonlinear single-electron tunneling through individually coated colloid particles at room temperature

Single-electron tunneling (SET) has been observed with nanometer coated colloid gold particles at room temperature. We have made the smallest (3-nm) thiol- and silicon dioxide (SiO2)-coated gold particles, from which we obtained SET signals using a scanning tunneling microscope (STM)images reveal individual particles supported by an atomically flat metal surface. The STM tip is used to obtain SET signals from the individual particles, whose shapes have been characterized. The current-voltage curves of the particles exhibit well-defined Coulomb staircases that resemble those obtained at 4.2 K, indicating a strong Coulomb repulsive interaction at room temperature. The clear Coulomb staircases are due to a nonlinearity in the current steps. We suggest a possible mechanism for the nonlinearity in terms of many-body excitations in the particle. We have also identified the region of the particles, where the SET signal originates, using current-imaging-tunneling spectroscopy. We describe the advantages of using the coated nanometer particles for making devices for room-temperature operations

Proton acceleration by irradiation of isolated spheres with an intense laser pulse

We report on experiments irradiating isolated plastic spheres with a peak laser intensity of 2-3 x 10(20) W cm(-2). With a laser focal spot size of 10 mu m full width half maximum (FWHM) the sphere diameter was varied between 520 nm and 19.3 mu m. Maximum proton energies of similar to 25 MeV are achieved for targets matching the focal spot size of 10 mu m in diameter or being slightly smaller. For smaller spheres the kinetic energy distributions of protons become nonmonotonic, indicating a change in the accelerating mechanism from ambipolar expansion towards a regime dominated by effects caused by Coulomb repulsion of ions. The energy conversion efficiency from laser energy to proton kinetic energy is optimized when the target diameter matches the laser focal spot size with efficiencies reaching the percent level. The change of proton acceleration efficiency with target size can be attributed to the reduced cross-sectional overlap of subfocus targets with the laser. Reported experimental observations are in line with 3D3V particle in cell simulations. They make use of well-defined targets and point out pathways for future applications and experiments.DFG via the Cluster of Excellence Munich-Centre for Advanced Photonics (MAP) Transregio SFB TR18NNSA DE-NA0002008Super-MUC pr48meIvo CermakCGC Instruments in design and realization of the Paul trap systemIMPRS-APSLMUexcellent Junior Research FundDAAD|ToIFEEuropean Union's Horizon research and innovation programme 633053Physic

Barriers and facilitators for the use of NURSING bedside handovers : implications for evidence‐based practice

BACKGROUND: Previous studies on bedside handovers have identified nurse-related barriers and facilitators for implementing bedside handovers, but have neglected the existing ward's nursing care system as an important influencing factor. AIMS: To determine the association between the existing nursing care system (i.e., decentralized, two-tier, or centralized) on a ward and the barriers and facilitators of the bedside handover. METHODS: Structured individual interviews (N = 106) on 14 nursing wards in eight hospitals were performed before implementation of bedside handovers. The structured interview guide was based on a narrative review. Direct content analysis was used to determine the nursing care system of a ward and the degree to which barriers and facilitators were present. Pearson's Chi-square analysis was used to determine whether there were associations between the nursing care systems concerning the presence of barriers and facilitators for implementing bedside handovers. RESULTS: Twelve barriers and facilitators were identified, of which three are new to literature: the possible loss of opportunities for socializing, collegiality, and overview; head nurse's role; and role of colleagues. The extent to which barriers and facilitators were present differed across nursing care systems, with the exception of breach of confidentiality (barrier), and an existing structured handover (facilitator). Overall, nurses working in decentralized nursing care systems report fewer barriers against and more facilitators in favor of using bedside handovers than nurses in two-tier or centralized systems. LINKING EVIDENCE TO ACTION: Before implementing bedside handovers, the context of the nursing care system may be considered to determine the most effective process to implement change. Based on these study findings, implementing bedside handovers could be more challenging on wards with a two-tier or centralized care system