34,478 research outputs found
Organizational Climate and Company Productivity: the Role of Employee Affect and Employee Level
Consistent with a growing number of models about affect and behaviour and with arecognition that perception alone provides no impetus for action, it was predicted thatassociations between company climate and productivity would be mediated by average levelof job satisfaction. In a study of 42 manufacturing companies, subsequent productivity wassignificantly correlated in controlled analyses with eight aspects of organizational climate(e.g. skill development and concern for employee welfare) and also with average jobsatisfaction. The mediation hypothesis was supported in hierarchical multiple regressions forseparate aspects of climate. In addition, an overall analysis showed that companyproductivity was more strongly correlated with those aspects of climate that had strongersatisfaction loadings. A second prediction, that managers¿ perceptions of climate would bemore closely linked to company productivity than would those of non-managers, was notsupported. However, managers¿ assessments of most aspects of their company¿s climatewere significantly more positive than those of non-managers.Organizational structure, organizational climate, employee welfare, manager,productivity.
Chiral Green's Functions in Superconformal Field Theory
By solving the Ward identities in a superconformal field theory we find the
unique three-point Green's functions composed of chiral superfields for N =
1,2,3,4 supersymmetry. We show that the N=1 four-point function with R-charge
equal to one is uniquely determined by the Ward identities up to the
specification of four constants. We discuss why chiral Green's functions above
three-points, with total R-charge greater than N, are not uniquely determined.Comment: 32 pages, no figures, LaTeX2e forma
Canonical and non-canonical equilibrium distribution
We address the problem of the dynamical foundation of non-canonical
equilibrium. We consider, as a source of divergence from ordinary statistical
mechanics, the breakdown of the condition of time scale separation between
microscopic and macroscopic dynamics. We show that this breakdown has the
effect of producing a significant deviation from the canonical prescription. We
also show that, while the canonical equilibrium can be reached with no apparent
dependence on dynamics, the specific form of non-canonical equilibrium is, in
fact, determined by dynamics. We consider the special case where the thermal
reservoir driving the system of interest to equilibrium is a generator of
intermittent fluctuations. We assess the form of the non-canonical equilibrium
reached by the system in this case. Using both theoretical and numerical
arguments we demonstrate that Levy statistics are the best description of the
dynamics and that the Levy distribution is the correct basin of attraction. We
also show that the correct path to non-canonical equilibrium by means of
strictly thermodynamic arguments has not yet been found, and that further
research has to be done to establish a connection between dynamics and
thermodynamics.Comment: 13 pages, 6 figure
Commuting quantities and exceptional W-algebras
Sets of commuting charges constructed from the current of a U(1) Kac-Moody
algebra are found. There exists a set S_n of such charges for each positive
integer n > 1; the corresponding value of the central charge in the
Feigin-Fuchs realization of the stress tensor is c = 13-6n-6/n. The charges in
each series can be written in terms of the generators of an exceptional
W-algebra.Comment: 27 pages, KCL-TH-92-
Duality Symmetries and G^{+++} Theories
We show that the non-linear realisations of all the very extended algebras
G^{+++}, except the B and C series which we do not consider, contain fields
corresponding to all possible duality symmetries of the on-shell degrees of
freedom of these theories. This result also holds for G_2^{+++} and we argue
that the non-linear realisation of this algebra accounts precisely for the form
fields present in the corresponding supersymmetric theory. We also find a
simple necessary condition for the roots to belong to a G^{+++} algebra.Comment: 35 pages. v2: 2 appendices added, other minor corrections. v3: tables
corrected, other minor changes, one appendix added, refs. added. Version
published in Class. Quant. Gra
Probability flux as a method for detecting scaling
We introduce a new method for detecting scaling in time series. The method
uses the properties of the probability flux for stochastic self-affine
processes and is called the probability flux analysis (PFA). The advantages of
this method are: 1) it is independent of the finiteness of the moments of the
self-affine process; 2) it does not require a binning procedure for numerical
evaluation of the the probability density function. These properties make the
method particularly efficient for heavy tailed distributions in which the
variance is not finite, for example, in Levy alpha-stable processes. This
utility is established using a comparison with the diffusion entropy (DE)
method
E11 and Spheric Vacuum Solutions of Eleven- and Ten dimensional Supergravity Theories
In view of the newly conjectured Kac-Moody symmetries of supergravity
theories placed in eleven and ten dimensions, the relation between these
symmetry groups and possible compactifications are examined. In particular, we
identify the relevant group cosets that parametrise the vacuum solutions of AdS
x S type.Comment: discussion improve
E_11 and M Theory
We argue that eleven dimensional supergravity can be described by a
non-linear realisation based on the group E_{11}. This requires a formulation
of eleven dimensional supergravity in which the gravitational degrees of
freedom are described by two fields which are related by duality. We show the
existence of such a description of gravity.Comment: 21 pages, some typos corrected and two references adde
Scaling in Non-stationary time series I
Most data processing techniques, applied to biomedical and sociological time
series, are only valid for random fluctuations that are stationary in time.
Unfortunately, these data are often non stationary and the use of techniques of
analysis resting on the stationary assumption can produce a wrong information
on the scaling, and so on the complexity of the process under study. Herein, we
test and compare two techniques for removing the non-stationary influences from
computer generated time series, consisting of the superposition of a slow
signal and a random fluctuation. The former is based on the method of wavelet
decomposition, and the latter is a proposal of this paper, denoted by us as
step detrending technique. We focus our attention on two cases, when the slow
signal is a periodic function mimicking the influence of seasons, and when it
is an aperiodic signal mimicking the influence of a population change (increase
or decrease). For the purpose of computational simplicity the random
fluctuation is taken to be uncorrelated. However, the detrending techniques
here illustrated work also in the case when the random component is correlated.
This expectation is fully confirmed by the sociological applications made in
the companion paper. We also illustrate a new procedure to assess the existence
of a genuine scaling, based on the adoption of diffusion entropy, multiscaling
analysis and the direct assessment of scaling. Using artificial sequences, we
show that the joint use of all these techniques yield the detection of the real
scaling, and that this is independent of the technique used to detrend the
original signal.Comment: 39 pages, 13 figure
- …