Search results for "Spect"
showing 10 items of 28650 documents
Understanding tungsten erosion during inter/intra-ELM periods in He-dominated JET-ILW plasmas
2021
Tungsten erosion was quantified during inter/intra-ELM periods in He-dominated JET-ILW plasmas by optical emission spectroscopy. The intra-ELM tungsten sputtering in helium plasmas, which dominates the total W source, prevails by a factor of about 4 over inter-ELM sputtering in the investigated ELM frequency range from 90 Hz-120 Hz. He ions are mainly responsible for the W erosion during the ELMs in He plasmas. The strong in/out asymmetry of the ELM-induced W erosion is observed in He plasmas even at high ELM frequencies beyond 100 Hz. In Ohmic/L-mode plasmas and during the H-mode inter-ELM plasma phases both He2+ and Be2+ ionic species are major contributors to the W erosion. Their contrib…
Erosion, screening, and migration of tungsten in the JET divertor
2019
The erosion of tungsten (W), induced by the bombardment of plasma and impurity particles, determines the lifetime of plasma-facing components as well as impacting on plasma performance by the influx of W into the confined region. The screening of W by the divertor and the transport of W in the plasma determines largely the W content in the plasma core, but the W source strength itself has a vital impact on this process. The JET tokamak experiment provides access to a large set of W erosion-determining parameters and permits a detailed description of the W source in the divertor closest to the ITER one: (i) effective sputtering yields and fluxes as function of impact energy of intrinsic (Be,…
The OLYMPUS Experiment
2014
Nuclear instruments & methods in physics research / A 741, 1 - 17 (2014). doi:10.1016/j.nima.2013.12.035
Board structures, liberal countries, and developed market economies. Do they matter in environmental reporting? An international outlook
2019
This is the pre-peer reviewed version of the following article: Board structures, liberal countries, and developed market economies. Do they matter in environmental reporting? An international outlook, which has been published in final form at: https://doi.org/10.1002/bse.2275. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Previous empirical evidence has shown the effect of most corporate governance mechanisms on corporate social responsibility and environmental disclosure. However, there is scant empirical evidence that examines the influence of liberal countries, developed market economies, and board s…
Video Recruitment : Online Perspectives and Implications for Employer Branding
2022
Video recruitment—the use of videos at any point in the recruitment process—has surged among organizations as a strategy for hiring talent and operating in their respective fields amid the pandemic. In particular, video interviews have become mainstream at the assessment stage of the recruitment funnel to keep hiring workers in a remote context of work. Among job video interviews, the asynchronous type especially raised interest and concerns online. This chapter offers a novel and essential approach to the study of video interviews through the theoretical exploration of the crossover between HRM, marketing, and information technology, with the goal of uncovering several ways that employer b…
Search for photons with energies above 1018 eV using the hybrid detector of the Pierre Auger Observatory
2017
A search for ultra-high energy photons with energies above 1 EeV is performed using nine years of data collected by the Pierre Auger Observatory in hybrid operation mode. An unprecedented separation power between photon and hadron primaries is achieved by combining measurements of the longitudinal air-shower development with the particle content at ground measured by the fluorescence and surface detectors, respectively. Only three photon candidates at energies 1-2 EeV are found, which is compatible with the expected hadron-induced background. Upper limits on the integral flux of ultra-high energy photons of 0.027, 0.009, 0.008, 0.008 and 0.007 km-2 sr-1 yr-1 are derived at 95% C.L. for ener…
Ultra-High Energy Neutrinos at the Pierre Auger Observatory
2013
The observation of ultrahigh energy neutrinos (UHE nu s) has become a priority in experimental astroparticle physics. UHE nu s can be detected with a variety of techniques. In particular, neutrinos can interact in the atmosphere (downward-going nu) or in the Earth crust (Earth-skimming nu), producing air showers that can be observed with arrays of detectors at the ground. With the surface detector array of the Pierre Auger Observatory we can detect these types of cascades. The distinguishing signature for neutrino events is the presence of very inclined showers produced close to the ground (i.e., after having traversed a large amount of atmosphere). In this work we review the procedure and …
W sprawie potrzeby uregulowania umowy franczyzy w Polsce
2021
Praca prezentuje w pierwszej kolejności zagadnienia związane z pojęciem umowy franczyzy jako empirycznym typem umowy, jak i teoretyczne zagadnienie problematyki umów nienazwanych. W kontekście treści stosunku prawnego franczyzy zwrócono uwagę na dwie kwestie. Po pierwsze, pomimo braku regulacji umowy franczyzy w polskim prawie cywilnym wpływ na treść stosunku prawnego franczyzy mają przepisy prawa publicznego z zakresu ochrony konkurencji (prawa antymonopolowego). Wpływ ten należy ocenić jako istotny. Ewentualne uregulowanie w prawie cywilnym umowy franczyzy nie będzie oznaczało dopuszczalności pominięcia przy nadawaniu jej konkretnej treści regulacji prawa ochrony konkurencji. Po drugie, t…
Observation of the Early Structural Changes Leading to the Formation of Protein Superstructures.
2014
Formation of superstructures in protein aggregation processes has been indicated as a general pathway for several proteins, possibly playing a role in human pathologies. There is a severe lack of knowledge on the origin of such species in terms of both mechanisms of formation and structural features. We use equine lysozyme as a model protein, and by combining spectroscopic techniques and microscopy with X-ray fiber diffraction and ab initio modeling of Small Angle X-ray Scattering data, we isolate the partially unfolded state from which one of these superstructures (i.e., particulate) originates. We reveal the low-resolution structure of the unfolded state and its mechanism of formation, hi…
Influence of uniaxial pressure on dielectric properties of (1- x )Na 0.5 Bi 0.5 TiO 3– x SrTiO 3 for x = 0.01, 0.04, and 0.1 ceramics
2017
The publication costs of this article were covered by the Estonian Academy of Sciences and the University of Tartu.