165 research outputs found

    The deregulation of airline employment in the USA and Europe: an emerging comparison

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    This thesis seeks to examine the deregulation of airline employment within Europe, by relating that change to the US experience. A historical/political economy approach is adopted which locates the process of deregulation with a context of changing product market conditions, bargaining power and regulatory influence. The regulated regime where labour conditions were protected is contrasted with one in which labour has come under pressure to concede premium terms and conditions. Analysis of labour costs and productivity assume that these terms and conditions will simply evaporate under the pressure of competition and privatisation. The thesis provides evidence that this may not be the case. It is argued that failure to examine employee concerns and perceptions underestimates employee responses, and overestimates the power of airline management, given the considerable bargaining power of key labour groups. Airline workers, especially those in large and successful, formerly state owned carriers, have expectations of wages and conditions based upon the regulated era. This regulatory overhang is examined in a detailed questionnaire of British Airways as a major European carrier, previously state owned, but not privatised. A number of models of labour market deregulation and case studies are introduced to analyse the nature and extent of these deep seated changes and their implications for labour, management and the state

    Molecular-based single crystal surfaces as functional substrates for directed metal binding

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    PhD ThesisMolecular-based crystals provide faces offering specific chemical groups, ordered in a spatially well-defined array, dependent of the crystal space group. These surfaces therefore offer potential to be exploited as templates for directing material binding in order to construct regular arrays of technologically useful nanomaterials, e.g. preformed nanoparticles, metal clusters formed insitu. The dimensions typically associated with molecular crystalline materials (i.e. unit cell, spacing between repeating chemical groups in crystal structure) are typically on the angstrom scale. This offers potential for the construction of patterned arrays of materials with resolutions that may exceed the capabilities of current conventional lithographic techniques which can typically produce feature sizes down to 10 nm (for 2015, ITRS). Towards this, a series bis-pyridyl derivatives containing metal binding sites, separated by a range of spacing groups (differing in length, rigidity and aromaticity), have been prepared and characterized. Single crystal X-ray diffraction has been used to determine the molecular orientation with respect to each crystal face, and hence assess the usefulness as a substrate for metal deposition. A study into how to further influence the crystal structure, and therefore optimize the likelihood of producing surfaces with the desired binding site pattern, was conducted using a crystal engineering approach to generate polymorphs of previously synthesized compounds by varying the crystallization conditions of solvent and temperature. Models for metal binding have been prepared in the form of ligand-metal complexes and have been studied by X-ray crystallography. Reactions involving silver or zinc salts with the prepared bis-pyridyl ligands afford complexes which identify the likely metal binding sites(s) of the organic compounds and also provide details of the effect of binding with respect to ligand conformation. This information is used to predict if there will be a strong interaction between metal ions and the organic single crystal surfaces, where iii minimal changes in geometry are desired, so the pre-grown crystal substrates are left unaffected by metal deposition. AFM (atomic force microscopy) and XPS (X-ray photoelectron spectroscopy) have been used to study a range of phosphine crystal surfaces before and after metal deposition. AFM provides topological analysis of surfaces and XPS provides chemical analysis. AFM experiments on the different bare crystal faces show a range of rough, smooth and stepped surfaces. It has also been shown here that XPS experiments can be performed on different faces of an organic single crystal, with potential to distinguish between faces based on peak intensity. Similar AFM and XPS experiments have also been performed on crystals after gold nanoparticle deposition and with deposition of gold ions in different oxidation states. These experiments show clear preferential binding to specific crystal faces in line with predictions made from viewing their crystal structures

    ShaneAO: wide science spectrum adaptive optics system for the Lick Observatory

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    A new high-order adaptive optics system is now being commissioned at the Lick Observatory Shane 3-meter telescope in California. This system uses a high return efficiency sodium beacon and a combination of low and high-order deformable mirrors to achieve diffraction-limited imaging over a wide spectrum of infrared science wavelengths covering 0.8 to 2.2 microns. We present the design performance goals and the first on-sky test results. We discuss several innovations that make this system a pathfinder for next generation AO systems. These include a unique woofer-tweeter control that provides full dynamic range correction from tip/tilt to 16 cycles, variable pupil sampling wavefront sensor, new enhanced silver coatings developed at UC Observatories that improve science and LGS throughput, and tight mechanical rigidity that enables a multi-hour diffraction- limited exposure in LGS mode for faint object spectroscopy science.Comment: 11 pages, 10 figures. Presented at SPIE Astronomical Telescopes + Instrumentation conference, paper 9148-7

    Commissioning ShARCS: the Shane Adaptive optics infraRed Camera-Spectrograph for the Lick Observatory 3-m telescope

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    We describe the design and first-light early science performance of the Shane Adaptive optics infraRed Camera-Spectrograph (ShARCS) on Lick Observatory's 3-m Shane telescope. Designed to work with the new ShaneAO adaptive optics system, ShARCS is capable of high-efficiency, diffraction-limited imaging and low-dispersion grism spectroscopy in J, H, and K-bands. ShARCS uses a HAWAII-2RG infrared detector, giving high quantum efficiency (>80%) and Nyquist sampling the diffraction limit in all three wavelength bands. The ShARCS instrument is also equipped for linear polarimetry and is sensitive down to 650 nm to support future visible-light adaptive optics capability. We report on the early science data taken during commissioning.Comment: 9 pages, 7 figures. Presented at SPIE Astronomical Telescopes + Instrumentation conference, paper 9148-11

    Donepezil Effects on Mood in Patients with Schizophrenia and Schizoaffective Disorder

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    Donepezil, 5 mg/d for 6 wk then 10 mg/d for 6 wk, and placebo daily for 12 wk in a double-blind cross-over paradigm, was added to the therapeutic regimen of 13 patients with schizophrenia or schizoaffective disorders, clinically stable on atypical antipsychotic medications. Patients had varying degrees of depressive symptoms, ranging from no depression to clinically significant depression. There was no worsening or induction of depression in individual patients or the group as a whole. In addition there was a statistically significant antidepressant effect in the group as a whole during the donepezil condition and a clinically significant antidepressant effect in the patients with clinically significant depressive symptoms, although there were not enough depressed patients in the group to conclude that donepezil may have antidepressant effects. Thus, in this study, donepezil did not induce or worsen depressive symptoms in schizophrenic and schizoaffective disorder patients

    The Grizzly, March 6, 1987

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    The Bermans: From Pennsburg to Vatican in Search of Beauty • Letters: I\u27ve Been Teaching Creative Writing for Thirty-Five Years, says Dolman; Ashman After Fire Dies Down; Forum Committee Clears Confusion; $10,000 Plus Without Copy Machines; Swimming\u27s Sieracki Steps Out • Pro Theatre to Present Our Town • Sue Ashman Says so Long • Bears Take Third at MAC Championships Best Finish in 38 Years • Women\u27s B-Ball Team Holds Heads High • Men\u27s Indoor Track Goes to Maine • Men Hoopsters Suffer Tough Loss to Washington to End \u2786-\u2787 • Runner Mike Griffin Rises Early to Set Records • Danville\u27s Donahoe Takes Bid to Nationals and Athlete of the Week • McDevitt Leads Swimmers with Performance and Dedication • Athletics and Academics: Far From the Odd Couple at U.C. • Rabble-Rousing Remembrances • College Work Study Vacancies • Ursinus Alumnus Publishes Cat Guide • Montco Science Research Competition at U.C.https://digitalcommons.ursinus.edu/grizzlynews/1184/thumbnail.jp

    SDSS 0956+5128: A Broad-line Quasar with Extreme Velocity Offsets

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    We report on the discovery of a Type 1 quasar, SDSS 0956+5128, with a surprising combination of extreme velocity offsets. SDSS 0956+5128 is a broad-lined quasar exhibiting emission lines at three substantially different redshifts: a systemic redshift of z ~ 0.714 based on narrow emission lines, a broad MgII emission line centered 1200 km/s bluer than the systemic velocity, at z ~ 0.707, and broad H\alpha and H\beta emission lines centered at z ~ 0.690. The Balmer line peaks are 4100 km/s bluer than the systemic redshift. There are no previously known objects with such an extreme difference between broad MgII and broad Balmer emission. The two most promising explanations are either an extreme disk emitter or a high-velocity black hole recoil. However, neither explanation appears able to explain all of the observed features of SDSS 0956+5128, so the object may provide a challenge to our general understanding of quasar physics.Comment: ApJ, accepte
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