Background: In recent years’ complaints on medical IT-systems has been seen in scientific journals concerning lack of usability, non-adequacy and deficiency of adaptation to the work activity. With a take-off point in safety work, MTO (Man - Technology - Organization), the nurses’ work in admission process has been studied in relation to a medical IT-system (Cosmic) and the routines of the organisation. Purpose: The purpose is to evaluate the nurses work process during admission patients in interaction with the medical IT-system (Cosmic). The strengths and weakness of the work process is mapped out and important protection barriers are shown with aim to enhance the work process with regards to nurses’ well-being and patient safety. Method: A qualitative field study was conducted at a ward at an emergency hospital. Observations of the nurses’ work process has been made as well as six interviews with nurses and one with their unit manager. In addition to that 13 nurses answered a questionnaire. Collected data has been categorized aided by a hierarchic task analysis and barrier analysis. Results: During interviews it was phrased that nurses mainly perceived the admission process well-functioning and Cosmic as a good work tool. However, there was a dissatisfaction with the number of clicks required to fulfil a task and a certain inconsistency with menus in Cosmic. It took long time to learn how to use Cosmic for the nurses. The biggest strength in Man - Technology - Organization identified as nurses work along with templates created by organization and used by nurses. The nurses make the process work despite deficits in Cosmic. Even tough templates exist because of deficits in Cosmic they are important complements that aids nurses collecting patient information in a standardized way. Nurses work process as well as complementary aid was identified as a barrier for information loss. A barrier for protecting nurses from frequent interruption in the work process was identified lacking. Conclusion: Technical systems (T) are available for the work process but these systems are not completely purposive. It is with the complementary aid (T) that nurses (M) through the organisations routines (O) make the admission process to work well. Keywords: MTO, usability, healthcare, nurses, Cosmic, admission process, work process, interactions, IT-system. / Bakgrund: Till grund för studien ligger klagomålen på medicinska IT-system i fackpress och vetenskapliga artiklar när det gäller bristande användarvänlighet, icke ändamålsenliga. Med utgångspunkt i ett synsätt på säkerhetsarbete, MTO, har sjuksköterskornas arbete i inskrivningsprocessen studerats i relation till ett medicinskt IT-system (Cosmic) och organisationens rutiner. Syfte: Syftet är att utvärdera hur sjuksköterskornas arbetsprocess vid inskrivning av patienter fungerar i förhållande till ett medicinskt journalsystem (Cosmic). Genom att kartlägga vilka styrkor och svagheter som finns i sjuksköterskors arbetsprocess i interaktion med journalsystemet påvisas viktiga skyddsbarriärer samtidigt som förslag till förbättringar presenteras. Metod: En kvalitativ fältstudie har utförts på en vårdavdelning på ett akutsjukhus i Stockholm. Sex timmars observationer av sjuksköterskors arbete har genomförts. Sex sjuksköterskor och deras chef har intervjuats. Därtill har 13 stycken sjuksköterskor svarat på en enkät. Insamlad data har kategoriserats och analyserats med hjälp av barriäranalys och hierarkisk uppgiftsanalys. Resultat: Under intervjuerna framkom att sjuksköterskorna överlag upplevde att inskrivningsprocessen fungerade bra och att Cosmic var ett bra arbetsredskap. Dock uppfattades en viss tröghet i Cosmic: många klick krävdes för att hitta rätt rubrik, rubriker var inte alltid konsekventa och det tog lång tid att lära sig. De största styrkorna i människa-teknik-interaktionen identifierades som sjuksköterskans arbete samt organisationens arbete i form av mallar. Sjuksköterskorna får inskrivningsprocessen att fungera trots vissa brister i Cosmic. Trots att mallar finns på grund av brister i Cosmic är de ändå viktiga komplement som hjälper sjuksköterskor att samla in nödvändig information på ett standardiserat sätt. En barriär som saknas är skydd mot att sjuksköterskorna blir avbrutna i inskrivningsprocessen. Avbrott i arbetsprocesser har kopplats samman med felhandlingar och därför rekommenderas åtgärder och barriärer mot detta. Slutsats: Tekniska system finns att tillgå vid arbetsprocessen men dessa system är inte helt ändamålsenliga. Det är kompletterande hjälpmedel (T) och sjuksköterskor (M) som genom organisationens rutiner (O) får inskrivningsprocessen att fungera bra. Nyckelord: MTO, användbarhet, sjukvård, sjuksköterskor, Cosmic, inskrivning, arbetsprocess, interaktioner, IT-system.

<p> Nuclear waste management and nonproliferation are among the critical tasks to be addressed for the advancement of nuclear energy in the United States. In this regard, monitoring spent nuclear fuel (SNF) and special nuclear materials (SNM) is important to continue reliable stewardship of SNF management and prevent SNM proliferation. Cosmic ray muons have been used for imaging large and dense objects, e.g., SNF dry casks, the Fukushima Daiichi unit-1 reactor, and the great pyramid of Giza. Despite their potential and success, the wide application of cosmic ray muons is limited by the naturally low intensity at sea level, approximately 10⁴ m^-2min^-1. For example, when imaging large objects, time consuming measurements typically in the order of several days or even weeks, are frequently needed to collect a statistically significant amount of muon samples to reconstruct images using muon tomography. However, when scanning time is of essence, e.g., treaty verification, low resolution imaging can result in potentially undetected diversion of nuclear materials.</p> <p>To maximize the utilizability of cosmic ray muons in engineering and physics applications, two important quantities–scattering angle and momentum–must be measured. Although many studies have demonstrated that there are significant benefits when measuring momentum in muon applications, measuring both the muon scattering angle and muon momentum in the field remains a challenge. To fill this critical gap, a novel concept using multi-layer pressurized gas Cherenkov radiators that is fieldable to allow muon momentum measurement in the field is presented in this dissertation. The proposed Cherenkov muon spectrometer is: (i) accurate (~90%) in classifying muon momentum, (ii) lightweight (< 10 kg) for easy transport and deployment in the field, (iii) compact (< 1 m³), and (iv) easily coupled with existing muon tomographic systems. Although muon momentum measurement resolution of spectrometers used in high energy physics laboratories, such as CMS or ATLAS of LHC at CERN, is less than 5% for low energy muons, these spectrometers typically (i) use bulky and large solenoidal or toroidal magnets and (ii) interfere with muon trajectories to measure momentum. These characteristics make them unsuitable for field deployment.</p> <p>In this work, the feasibility of using the proposed Cherenkov muon spectrometer coupled with current muon tomographic systems is explored and evaluated using Monte Carlo simulations and reconstruction algorithms. It is shown the use of the proposed Cherenkov muon spectrometer has the potential to improve muon tomographic imaging resolution or reduce measurement time by a factor of 10 or more when used to identify a missing fuel assembly from a SNF dry cask. In addition, a new imaging algorithm is developed that integrates muon momentum and muon scattering without significantly increasing computational cost. Advances in momentum-integrated muon tomography have the potential to improve monitoring and imaging efficiency in various nuclear engineering applications. For example, it can expand current capabilities to continue reliable stewardship in nuclear material management, i.e., Continuity of Knowledge, and prevent SNM proliferation to unauthorized states and parties. The benefit of such an approach is a compact, lightweight, and portable spectrometer that can be deployed in the field to improve existing or explore new engineering applications: muon tomography, geological studies, and cosmic radiation measurement in space.</p>

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This dissertation seeks to capture Muhammad's emergence as Prophet. It starts from the premise that he located himself as a Prophet within a fraternity of prophethood. More specifically he has seen his work as a continuation of the Biblical prophetic tradition. However he has stressed his election as correcting what has been altered in this Biblical tradition. Muhammad: A prophet of God argues that he has as prophet the same defining elements as Biblical prophets; as result we must not criticise him unnecessarily, that is, for the sake of fitting him into our categories. Muhammad must be seen terms of his experiences. In addition we must capture his contribution to humanity. / Religious Studies & Arabic / M.A. (Religious Studies)

In this thesis, I study the relativistic effects of matter inhomogeneities on the accelerating expansion of the Universe. The acceleration is often taken to be caused by the presence of an exotic fluid called Dark Energy, or else a non-zero 'cosmological constant' term in the field equations of General Relativity. I consider whether this result could instead be an artefact caused by using an incorrect model to interpret observations. The standard 'concordance' cosmological model assumes the Cosmological Principle, which states that the matter distribution on large scales is homogeneous. One possibility is that correction terms appear in the field equations when small-scale inhomogeneities are smoothed over to produce this homogeneous model. These 'backreaction' effects could affect the dynamics of the spacetime, causing an apparent acceleration. I clarify the relationship between acceleration of the averaged spacetime and acceleration inferred from observable quantities, and show that they are closely related in statistically-homogeneous spacetimes. Another possibility is that the Universe could be inhomogeneous on large scales. If there was a large ‘void’, with us at the centre, the lensing of light by the void could reproduce the observations that imply cosmic acceleration. I show that a popular class of void models, based on spherically-symmetric Lemaitre-Tolman-Bondi spacetimes, are unable to simultaneously fit a selection of observational data, thus effectively ruling-out this possibility. These data include the Kinematic Sunyaev-Zel'dovich (KSZ) effect, which is a distortion/shift of the Cosmic Microwave Background (CMB) frequency spectrum caused by the Compton scattering of photons by hot gas in galaxy clusters. This, and other distortions of the CMB frequency spectrum, are sensitive to the degree of anisotropy in the CMB about a scattering cluster. I suggest tests involving these observables that exploit the strong link between isotropy and homogeneity to (a) distinguish between different causes of a deviation from spatial flatness on the horizon scale, and (b) potentially confirm the Cosmological Principle using observations. Finally, I describe a novel Bayesian CMB component separation method for extracting the Sunyaev-Zel'dovich signal of clusters from CMB sky maps.

This dissertation investigates the figure of “the Texan” during the 1970s across local, regional, and national contexts to unpack how the “national” discourse of Texanness by turns furthered and foreclosed visions of a more inclusive American polity in the late twentieth century. The project began in oral history work surrounding the cultural politics of Austin’s progressive country music scene in the decade, but quickly expanded to encompass the larger transformations roiling the state and the nation in the 1970s. As civil rights and feminist movements redefined hegemonic notions of the representative Texan, icons of Anglo-Texan masculinity—the cowboy, the oilman, the wheeler-dealer—came in for a dizzying round of celebration and critique, satire and ritual performance. Such Seventies performances of “the Texan” as took place in Austin’s “cosmic cowboy” subculture provided an imaginative space to refigure Anglo-Texan identity in ways that responded to and internalized the decade’s identity politics. From the death of Lyndon Johnson to Willie Nelson’s picnics, from the United Farm Workers’ marches on Austin to the spectacle of Texas Chic on the streets of New York City, Texas mattered in these years not simply as a place, but as a repository of longstanding American myths and symbols at a historical moment in which that mythology was being deeply contested. This dissertation maps the messy ground of the 1970s in Texas along several paths. It begins some years prior with the Centennial Exposition of 1936 and the regionalism of J. Frank Dobie, Walter Prescott Webb, and Roy Bedichek before proceeding to the challenges to their vision of “the Texan” on the part of the African American civil rights, Chicano, and women’s movements. The dissertation’s central chapters then address the melding of countercultural forms and the state’s traditional Anglo-Texan iconography and music in spaces like Austin’s Armadillo World Headquarters. Popular music, art, film, journalism, and literature evoke this attempted revisioning of Anglo-Texan masculinity in dialogue with the decade’s identity politics. / text

This thesis describes the analysis of pointed thermal Sunyaev-Zel'dovich (SZ) effect data from observations using the Cosmic Background Imager 2 (CBI2). CBI2 is an upgrade to the original Cosmic Background Imager, with antennas that have twice the effective collecting area, and hence provide greater sensitivity on longer baselines. Observations of the thermal SZ effect constrain the line-of-sight integrated gas pressure within clusters of galaxies and, when combined with X-ray data, provide an excellent tool for deriving the physical properties of these large structures. The CBI2 SZ data combine relatively low-resolution with a large field-of-view, and can therefore be used to constrain the gas properties of medium-redshift clusters out to the virial radius. By jointly fitting a suitable analytical model to SZ data and X-ray surface brightness data, it is possible to obtain constraints on the temperature and total mass of the cluster. For the analysis work presented in this thesis I choose to parametrise the gas based upon the known behaviour of the entropy, and the total mass by the Navarro, Frenk and White (NFW) prescription. This model is tested against Hydrodynamic/N-body simulations and is found to reproduce the radial behaviour of key cluster properties. The CBI2 observations presented in this work focus on the REFLEX-DXL clusters, an X-ray luminous sub-sample of the REFLEX survey at z ~ 0.3, which have previously published X-ray surface brightness data. The Bullet Cluster, a significant merger system, is a member of this sample and is presented here as a case study for use of the entropy-based model. The derived total mass and gas mass fraction of this cluster are found to be consistent with results from previous X-ray observations. The derived properties from the REFLEX-DXL sample are used to construct a preliminary set of SZ scaling relations out to the virial radius, and are found to be consistent with the self-similar model for massive clusters.

Astrophysical observations give convincing evidence for a vast non-baryonic component, the so-called dark matter, accounting for over 20% of the overall content of our Universe. Direct dark matter search experiments explore the possibility of interactions of these dark matter particles with ordinary baryonic matter via elastic scattering resulting in single nuclear recoils. The ZEPLIN-III detector operated on the basis of a dualphase (liquid/gas) xenon target, recording events in two separate response channels { scintillation and ionisation. These allow discrimination between electron recoils (from background radiation) and the signal expected from Weakly Interacting Massive Particle (WIMP) elastic scatters. Following a productive first exposure, the detector was upgraded with a new array of ultra-low background photomultiplier tubes, reducing the electron recoil background by over an order of magnitude. A second major upgrade to the detector was the incorporation of a tonne-scale active veto detector system, surrounding the WIMP target. Calibration and science data taken in coincidence with ZEPLIN-III showed rejection of up to 30% of the dominant electron recoil background and over 60% of neutron induced nuclear recoils. Data taking for the second science run finished in May 2011 with a total accrued raw fiducial exposure of 1,344 kg days. With this extensive data set, from over 300 days of run time, a limit on the spin-independent WIMP-nucleon cross-section of 4.8 10-8 pb near 50 GeV/c2 WIMP mass with 90% confidence was set. This result combined with the first science run of ZEPLIN-III excludes the scalar cross-section above 3.9 10-8 pb. Studying the background data taken by the veto detector allowed a calculation of the neutron yield induced by high energy cosmic-ray muons in lead of (5.8 0.2) 10-3 neutrons/muon/(g/cm2) for a mean muon energy of 260 GeV. Measurements of this kind are of great importance for large scale direct dark matter search experiments and future rare event searches in general. Finally, this work includes a comprehensive measurement of the energy dependent quenching factor for low energy nuclear recoils in a plastic scintillator, such as from the ZEPLIN-III veto detector, increasing accuracy for future simulation packages featuring large scale plastic scintillator detector systems.

]The scale difference between point in situ soil moisture measurements and low resolution satellite products limits the quality of any validation efforts in heterogeneous regions. Cosmic Ray Neutron Probes (CRNP) could be an option to fill the scale gap between both systems, as they provide area-average soil moisture within a 150-250 m radius footprint. In this study, we evaluate differences and similarities between CRNP observations, and surface soil moisture products from the Advanced Microwave Scanning Radiometer 2 (AMSR2), the METOP-A/B Advanced Scatterometer (ASCAT), the Soil Moisture Active and Passive (SMAP), the Soil Moisture and Ocean Salinity (SMOS), as well as simulations from the Global Land Data Assimilation System Version 2 (GLDAS2). Six CRNPs located on five continents have been selected as test sites: the Rur catchment in Germany, the COSMOS sites in Arizona and California (USA), and Kenya, one CosmOz site in New SouthWales (Australia), and a site in Karnataka (India). Standard validation scores as well as the Triple Collocation (TC) method identified SMAP to provide a high accuracy soil moisture product with low noise or uncertainties as compared to CRNPs. The potential of CRNPs for satellite soil moisture validation has been proven; however, biomass correction methods should be implemented to improve its application in regions with large vegetation dynamics.

Title: Study of Cosmic-Ray Acceleration in Extragalactic Objects Author: Stanislav tefnik Department: Institute of Particle and Nuclear Physics Supervisor: RNDr. Dalibor Nosek, Dr. Abstract: This thesis deals with production processes of cosmic γ-rays in astro- physical objects and methods of their detection. Possible interactions leading to the emission of high energy γ-rays in the active galaxy Centaurus A are discussed in this context. Cherenkov Telescope Array is presented as a new experiment fo- cused on the detection of air showers initiated by cosmic γ-rays. Cherenkov light of air showers is studied in the simulations done by CORSIKA simulation tool. Method of data analysis within the framework of Cherenkov telescopes is descri- bed and performed on the dataset of the active galaxy PKS 2155-304. The results include statistical tests of γ-ray source presence and its time variability. Keywords: Cosmic rays, gamma rays, astroparticle physics, high energy astro- physics, acceleration, CTA experiment