18,151 research outputs found
The Moderating Role of Context in Determining Unethical Managerial Behavior: A Case Survey
We examine the moderating role of the situational and organizational contexts in determining unethical managerial behavior, applying the case-survey methodology. On the basis of a holistic, multiple-antecedent perspective, we hypothesize that two key constructs, moral intensity and situational strength, help explain contextual moderating effects on relationships between managers’ individual characteristics and unethical behavior. Based on a quantitative analysis of 52 case studies describing occurrences of real-life unethical conduct, we find empirical support for the hypothesized contextual moderating effects of moral intensity and situational strength. By examining these complex contextual moderators, we aim to contribute to organizational ethics research as we shed light on the critical role that context may play in influencing unethical managerial behavior
Density of States in Landau Level Tails of GaAs-AlxGa1-xAs Heterostructures
From an analysis of the thermally activated resistivity as a function of the magnetic field in the quantum Hall regime we deduced the position of the Fermi energy in the mobility gap as a function of the filling factor and therefore the density of states. The measured density of states is best described by a Gaussian like profile superimposed on a constant background
Energy Conversion Alternatives Study (ECAS), Westinghouse phase 1. Volume 6: Closed-cycle gas turbine systems
Both recuperated and bottomed closed cycle gas turbine systems in electric power plants were studied. All systems used a pressurizing gas turbine coupled with a pressurized furnace to heat the helium for the closed cycle gas turbine. Steam and organic vapors are used as Rankine bottoming fluids. Although plant efficiencies of over 40% are calculated for some plants, the resultant cost of electricity was found to be 8.75 mills/MJ (31.5 mills/kWh). These plants do not appear practical for coal or oil fired plants
Eta Carinae across the 2003.5 Minimum: Analysis in the visible and near infrared spectral region
We present an analysis of the visible through near infrared spectrum of Eta
Carinae and its ejecta obtained during the "Eta Carinae Campaign with the UVES
at the ESO VLT". This is a part of larger effort to present a complete Eta
Carinae spectrum, and extends the previously presented analyses with the
HST/STIS in the UV (1240-3159 A) to 10,430 A. The spectrum in the mid and near
UV is characterized by the ejecta absorption. At longer wavelengths, stellar
wind features from the central source and narrow emission lines from the
Weigelt condensations dominate the spectrum. However, narrow absorption lines
from the circumstellar shells are present. This paper provides a description of
the spectrum between 3060 and 10,430 A, including line identifications of the
ejecta absorption spectrum, the emission spectrum from the Weigelt
condensations and the P-Cygni stellar wind features. The high spectral
resolving power of VLT/UVES enables equivalent width measurements of atomic and
molecular absorption lines for elements with no transitions at the shorter
wavelengths. However, the ground based seeing and contributions of nebular
scattered radiation prevent direct comparison of measured equivalent widths in
the VLT/UVES and HST/STIS spectra. Fortunately, HST/STIS and VLT/UVES have a
small overlap in wavelength coverage which allows us to compare and adjust for
the difference in scattered radiation entering the instruments' apertures. This
paper provides a complete online VLT/UVES spectrum with line identifications
and a spectral comparison between HST/STIS and VLT/UVES between 3060 and 3160
A.Comment: 13 pages, 11 figures + atlas. The paper accepted for the ApJS and is
accompanied with an atlas in the online edition pape
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Towards transnational CSR. Corporate social responsibility approaches and governance solutions for multinational corporations
The global environment in which multinational corporations (MNCs) operate dramatically increases the complexity of the governance challenges and ethical dilemmas confronting MNCs and their leaders, as well as the diversity of stakeholders whose interests must be considered. In this context, MNCs face a perennial dilemma: how to balance the need for global consistency in CSR approaches and ethical standards across the organization with the need to be sensitive to the demands and expectations of a diverse set of stakeholders spread across the globe? Building on the framework of “transnational CSR”, we provide a systematic mapping of CSR approaches in MNCs, high¬light the tensions and possible trade-offs between globally integrated and locally adapted CSR strategies, and discuss the constraints that they impose on MNC activities at both headquarters and subsidiary levels. We also highlight the impli¬cations for corporate governance, stakeholder management and corporate social performance. Based on in-depth case studies of 18 MNCs, we conclude that a transnational CSR approach that attempts to strike an appropriate balance between global consistency and local adaptation seems best able to guide managerial decision making and help executives address the CSR challenges in the global arena
Similarity Measure Development for Case-Based Reasoning- A Data-driven Approach
In this paper, we demonstrate a data-driven methodology for modelling the
local similarity measures of various attributes in a dataset. We analyse the
spread in the numerical attributes and estimate their distribution using
polynomial function to showcase an approach for deriving strong initial value
ranges of numerical attributes and use a non-overlapping distribution for
categorical attributes such that the entire similarity range [0,1] is utilized.
We use an open source dataset for demonstrating modelling and development of
the similarity measures and will present a case-based reasoning (CBR) system
that can be used to search for the most relevant similar cases
On the Structure and Kinematics of Nebulae around LBVs and LBV Candidates in the LMC
We present a detailed analysis of the morphology and kinematics of nebulae
around LBVs and LBV candidates in the Large Magellanic Cloud. HST images and
high-resolution Echelle Spectra were used to determine the size, shape,
brightness, and expansion velocities of the LBV nebulae around R127, R143, and
S61. For S Dor, R71, R99, and R84 we discuss the possible presence of nebular
emission, and derive upper limits for the size and lower limits on the
expansion velocities of possible nebulae. Including earlier results for the LBV
candidates S119 and SK-69 279 we find that in general the nebulae around LBVs
in the LMC are comparable in size to those found in the Milky Way. The
expansion velocities of the LMC nebulae, however, are significantly lower--by
about a factor of 3 to 4--than those of galactic nebulae of comparable size.
Galactic and LMC nebulae show about the same diversity of morphologies, but
only in the LMC do we find nebulae with outflow. Bipolarity--at least to some
degree--is found in nebulae in the LMC as well as in the Milky Way, and
manifests a much more general feature among LBV nebulae than previously known.Comment: paper accepted by A&A, 25 pages, 24 figures; paper with images in
full resolution available at
http://www.astro.ruhr-uni-bochum.de/kweis/publications.htm
Dust Formation and He II 4686 emission in the Dense Shell of the Peculiar Type Ib Supernova 2006jc
We present evidence for the formation of dust grains in an unusual Type Ib SN
based on late-time spectra of SN 2006jc. The progenitor suffered an LBV-like
outburst just 2 yr earlier, and we propose that the dust formation is a
consequence of the SN blast wave overtaking that LBV-like shell. The key
evidence for dust formation is (a) the appearance of a red/near-IR continuum
source fit by 1600 K graphite grains, and (b) fading of the redshifted sides of
He I emission lines, yielding progressively more asymmetric blueshifted lines
as dust obscures receding material. This provides the strongest case yet for
dust formation in any SN Ib/c. Both developments occurred between 51 and 75 d
after peak, while other SNe observed to form dust did so after a few hundred
days. Geometric considerations indicate that dust formed in the dense swept-up
shell between the forward and reverse shocks, and not in the freely expanding
SN ejecta. Rapid cooling leading to dust formation may have been aided by
extremely high shell densities, as indicated by He I line ratios. The brief
epoch of dust formation is accompanied by He II 4686 emission and enhanced
X-ray emission. These clues suggest that the unusual dust formation in this
object was not due to properties of the SN itself, but instead -- like most
peculiarities of SN 2006jc -- was a consequence of the dense environment
created by an LBV-like eruption 2 yr before the SN.Comment: ApJ, accepted. added some discussion and 2 figures, better title,
conclusions same as previous version. 12 pages, 4 color fig
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