bluuebunny/crossref_metadata_2025_split huggingface dataset:
A psychological contract perspective on organizational citizenship behavior
Authors: Coyle‐Shapiro Jacqueline A‐M. 
Published: November 2002

AbstractThis study examined the contribution of the psychological contract framework to understanding organizational citizenship behavior (OCB) using survey data gathered at three measurement points over a three‐year period from 480 public sector employees. Separating perceived contract breach into its two components (perceived employer obligations and inducements), the data suggest that perceived employer obligations explained unique variance in three dimensions of citizenship behavior (helping, advocacy and functional participation) beyond that accounted for by perceived employer inducements. Employees' acceptance of the norm of reciprocity moderated the relationship between employer inducements and the dimensions of advocacy and functional participation. Employees' trust in their employer moderated the relationship between perceived employer obligations and the dimensions of advocacy and functional participation. Contrary to the hypothesis, procedural or interactional justice did not moderate the relationship between employer inducements and OCB. The implications of the findings for psychological contract research are discussed. Copyright © 2002 John Wiley & Sons, Ltd.
The impact of a large‐scale traumatic event on individual and organizational outcomes: exploring employee and company reactions to September 11, 2001
Authors: Byron Kristin , Peterson Suzanne 
Published: November 2002

AbstractMuch of the literature on stress and organizational outcomes has focused on organizational factors and has ignored extraorganizational stressors that lead to perceived stress. However, research in other fields and recent studies in management suggests that acute‐extraorganizational stressors, such as traumatic events, may have potentially negative and costly implications for organizations. This study tests a theoretical model of traumatic stress and considers the relationship between strain from an acute‐extraorganizational stressor, the terrorist attack on September 11, 2001, and absenteeism. Using a sample of 108 MBA and MPA students, this study suggests that strain caused by an acute‐extraorganizational stressor can have important consequences for organizations. Namely, employees who report more strain from a traumatic life event are more likely to be absent from work in the weeks following the event. Copyright © 2002 John Wiley & Sons, Ltd.
The Schrödinger equation and a multidimensional inverse scattering transform
Authors: Bernstein Swanhild 
Published: November 2002

AbstractThe Schrödinger equation is one of the most important equations in mathematics, physics and also engineering. We outline some connections between transformations of non‐linear equations, the Schrödinger equation and the inverse scattering transform. After some remarks on generalizations into higher dimensions we present a multidimensional ∂¯ method based on Clifford analysis. To explain the method we consider the formal solution of the inverse scattering problem for the n‐dimensional time‐dependent Schrödinger equations given by A.I. Nachman and M.J. Ablowitz. Copyright © 2002 John Wiley & Sons, Ltd.
Boundary value problems for Dirac operators and Maxwell's equations in non‐smooth domains
Authors: Mitrea Marius 
Published: November 2002

AbstractWe study the well‐posedness of the half‐Dirichlet and Poisson problems for Dirac operators in three‐dimensional Lipschitz domains, with a special emphasis on optimal Lebesgue and Sobolev‐Besov estimates. As an application, an elliptization procedure for the Maxwell system is devised. Copyright © 2002 John Wiley & Sons, Ltd.
An analogue of the Sommerfeld radiation condition for the Dirac operator
Authors: Kravchenko Vladislav V. , Castillo P. Raúl 
Published: November 2002

AbstractA simple radiation condition at infinity for time‐harmonic massive Dirac spinors is proposed. This condition allows an analogue of the Cauchy integral formula in unbounded domains for null‐solutions of the Dirac equation to be proved. The result is obtained with the aid of methods of quaternionic analysis. Copyright © 2002 John Wiley & Sons, Ltd.
Hermitian Clifford analysis and resolutions
Authors: Sabadini Irene , Sommen Frank 
Published: November 2002

AbstractIn this paper, we discuss the so‐called Witt basis in a Clifford algebra and we axiomatically define an algebra of abstract Hermitian vector variables similar to the ‘radial algebra’. In this setting, we introduce some linear partial differential operators and we study their resolutions. Copyright © 2002 John Wiley & Sons, Ltd.
Computational algebraic analysis methods in Clifford analysis
Authors: Sabadini Irene , Struppa Daniele C. 
Published: November 2002

AbstractRecent advances in Computer Algebra have made it possible the study of algebraic analysis in an explicit and computational way. In this paper we show how these ideas have allowed the solution of a new class of problems in Clifford analysis and we describe the computational techniques that we have to develop to this purpose. Copyright © 2002 John Wiley & Sons, Ltd.
Weighted singular integral operators in Clifford analysis
Authors: Reyes Juan Bory , Abreu Blaya Ricardo 
Published: November 2002

AbstractWe consider the Cauchy‐type integral and singular integral operator having a weighted Cauchy kernel, both over a domain bounded by an n‐dimensional surface in ℝn+1, n⩾2. The aim of this paper is to study the behaviour of the weighted Cauchy singular integral operators near the integration boundary as well as to establish the basic relation among them. In certain sense, this approach has the advantage of being better related with boundary value problems than what is concerned in the setting of smooth surfaces. Copyright © 2002 John Wiley & Sons, Ltd.
Some properties of the Cauchy‐type integral for the time‐harmonic relativistic Dirac equation
Authors: Schneider Baruch , Shapiro Michael 
Published: November 2002

AbstractIn this paper we study an analogue of the Cauchy‐type integral for the theory of time‐harmonic solutions of the relativistic Dirac equation in case of a piece‐wise Liapunov surface of integration and we prove the Sokhotski–Plemelj theorem for it as well as the necessary and sufficient condition for the possibility to extend a given Hölder function from such a surface up to a solution of the relativistic Dirac equation in a domain. Formula for the square of the singular Cauchy‐type integral is given. The proofs of all these facts are based on intimate relations between time‐harmonic solutions of the relativistic Dirac equation and some versions of quaternionic analysis. Copyright © 2002 John Wiley & Sons, Ltd.
Clifford analysis on projective hyperbolic space II
Authors: Sommen F. , Cerejeiras P. , Kähler U. 
Published: November 2002

AbstractIn this paper, we identify the hyperbolic unit ball with the manifold of rays within the future null cone. By means of theinduced Clifford algebra structure there we obtain the definition of Dirac operators on sections of homogeneous line bundles and a homogeneous version of the Borel–Pompeiu formula.Finally, we introduce for this projective model of hyperbolic space a scale of the so‐called Qp‐spaces and study some of its basic properties. Copyright © 2002 John Wiley & Sons, Ltd.
The spherical X‐ray transform
Authors: Cerejeiras P. , Schaeben H. , Sommen F. 
Published: November 2002

AbstractThe general objective of this communication is to present the basics of mathematical texture analysis as part of integral geometry involving spherical analogues of the X‐ray and Radon transform, and in particular to clarify its relationship with mathematical tomography. Copyright © 2002 John Wiley & Sons, Ltd.
Bergman kernels for rectangular domains and multiperiodic functions in Clifford analysis
Authors: Constales D. , S. Kraußhar R. 
Published: November 2002

AbstractIn this paper, we consider rectangular domains in real Euclidean spaces of dimension at least 2, where the sides can be finite, semi‐infinite, or fully infinite. The Bergman reproducing kernel for the space of monogenic and square integrable functions on such a domain is obtained in closed form as a finite sum of monogenic multiperiodic functions. The reproducing property leads to an estimate of the first derivative of the single‐periodic cotangent function in terms of the classical real‐valued Eisenstein series. Copyright © 2002 John Wiley Sons, Ltd.
Clifford analytic complete function systems for unbounded domains
Authors: Lakew Dejenie A. , Ryan John 
Published: November 2002

AbstractThe main theme of this paper is to construct Clifford analytic‐complete function systems in the generalized Bergman spaces: BpCln(Ω):=kerD(Ω)∩LpCln(Ω), and Bp,2Cln(Ω):=ker▵(Ω)∩LpCln(Ω). These systems are used to approximate null solutions of elliptic partial differential equations of the Dirac and Laplace operators over an unbounded domain Ω in ℝn. Copyright © 2002 John Wiley & Sons, Ltd.
Almansi‐type theorems in Clifford analysis
Authors: Malonek Helmuth R. , Ren Guangbin 
Published: November 2002

AbstractIn this paper, we consider functions defined in a star‐ike omain Ω⊂ℝn with values in the Clifford lgebra C𝓁0,n which are polymonogenic with respect to the (left) Dirac operator D=∑j=1n ej∂/∂xj, i.e. they belong to the kernel of Dk.We prove that any polymonogenic function f has a ecomposition of the form

f=f1+xf2+···+xk−1fk
,
where x=x1e1+···+xnen and fj, j=1,…,k, are monogenic functions. This generalizes classical Almansi theorem for polyharmonic functions as well e Fischer decomposition of polynomials. Similar results tained for the powers of weighted Dirac operators of the form D̃=∣x∣−αxD, α∈ℝ\{0}. Copyright © John Wiley & Sons, Ltd.
On conjugate harmonic functions in Euclidean space
Authors: Brackx F. F. , Delanghe R. , Sommen F. C. 
Published: November 2002

AbstractIn this paper we consider the problem of constructing in domains Ωof ℝm+1 with a specific geometric property, a conjugate harmonic V to a given harmonic function U, as a direct generalization of the complex plane case. This construction is carried out in the framework of Clifford analysis which focusses on the so‐called monogenic functions, i.e. null solutions of the Dirac operator. An explicit formula of the associated monogenic function F=U+ē0 V in terms of a harmonic potential is constructed and the interconnection with the Stein–Weiss notion of conjugate harmonicity will be shown. Copyright © 2002 John Wiley & Sons, Ltd.
On finite difference potentials and their applications in a discrete function theory
Authors: Gürlebeck K. , Hommel A. 
Published: November 2002

AbstractWe present a potential theoretical method which is based on the approximation of the boundary value problem by a finite difference problem on a uniform lattice. At first the discrete fundamental solution of the Laplace equation is studied and the theory of difference potentials is described. In the second part we define a discrete Cauchy integral operator and a Teodorescu transform. In addition a Borel–Pompeiu formula can be formulated. Copyright © 2002 John Wiley & Sons, Ltd.
Reliability bounds for the NBUE distributions
Authors: Cheng Kan , Lam Yeh 
Published: November 2002

AbstractIn this paper, we study upper and lower bounds on the reliability in new better than used in expectation (NBUE) life distribution class with fixed first two moments. By a constructive proof, we determine the upper bounds on the reliability analytically in different regions and show that these bounds are sharp. For the lower bounds, similar results are obtained except in one region. For that region, a conjecture is given for further study. © 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 781–797, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/nav.10035
Minimizing weighted earliness and tardiness penalties in single‐machine scheduling with idle time permitted
Authors: Chen Jaw‐Yeh , Lin Sheng‐Fuu 
Published: November 2002

AbstractIn this paper, a single‐machine scheduling problem with weighted earliness and tardiness penalties is considered. Idle time between two adjacent jobs is permitted and due dates of jobs could be unequal. The dominance rules are utilized to develop a relationship matrix, which allows a branch‐and‐bound algorithm to eliminate a high percentage of infeasible solutions. After combining this matrix with a branching strategy, a procedure to solve the problem is proposed. © 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 760–780, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/nav.10039
Centralized inventory control in a two‐level distribution system with Poisson demand
Authors: Marklund Johan 
Published: November 2002

AbstractThis paper introduces a new replenishment policy for inventory control in a two‐level distribution system consisting of one central warehouse and an arbitrary number of nonidentical retailers. The new policy is designed to control the replenishment process at the central warehouse, using centralized information regarding the inventory positions and demand processes of all installations in the system. The retailers on the other hand are assumed to use continuous review (R, Q) policies. A technique for exact evaluation of the expected inventory holding and backorder costs for the system is presented. Numerical results indicate that there are cases when considerable savings can be made by using the new (α0, Q0) policy instead of a traditional echelon‐ or installation‐stock (R, Q) policy. © 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 798–822, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/nav.10040
A branch‐and‐price algorithm for a hierarchical crew scheduling problem
Authors: Faneyte Diego B.C. , Spieksma Frits C.R. , Woeginger Gerhard J. 
Published: November 2002

AbstractWe describe a real‐life problem arising at a crane rental company. This problem is a generalization of the basic crew scheduling problem given in Mingozzi et al. [18] and Beasley and Cao [6]. We formulate the problem as an integer programming problem and establish ties with the integer multicommodity flow problem and the hierarchical interval scheduling problem. After establishing the complexity of the problem we propose a branch‐and‐price algorithm to solve it. We test this algorithm on a limited number of real‐life instances. © 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 723–742, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/nav.10044
Suppression of enemy air defenses (SEAD) as an information duel
Authors: Barkdoll Timothy C. , Gaver Donald P. , Glazebrook Kevin D. , Jacobs Patricia A. , Posadas Sergio 
Published: November 2002

AbstractBlue strike aircraft enter region ℛ to attack Red targets. In Case 1, Blue conducts (preplanned) SEAD to establish air superiority. In the (reactive) SEAD scenario, which is Case 2, such superiority is already in place, but is jeopardized by prohibitive interference from Red, which threatens Blue's ability to conduct missions. We utilize both deterministic and stochastic models to explore optimal tactics for Red in such engagements. Policies are developed which will guide both Red's determination of the modes of operation of his engagement radar, and his choice of Blue opponent to target next. An index in the form of a simple transaction kill ratio plays a major role throughout. Published 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 723–742, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/nav.10046
Stabilized finite element method for viscoplastic flow: formulation with state variable evolution
Authors: Maniatty Antoinette M. , Liu Yong 
Published: November 2002

AbstractA stabilized, mixed finite element formulation for modelling viscoplastic flow, which can be used to model approximately steady‐state metal‐forming processes, is presented. The mixed formulation is expressed in terms of the velocity, pressure and state variable fields, where the state variable is used to describe the evolution of the material's resistance to plastic flow. The resulting system of equations has two sources of well‐known instabilities, one due to the incompressibility constraint and one due to the convection‐type state variable equation. Both of these instabilities are handled by adding mesh‐dependent stabilization terms, which are functions of the Euler–Lagrange equations, to the usual Galerkin method. Linearization of the weak form is derived to enable a Newton–Raphson implementation into an object‐oriented finite element framework. A progressive solution strategy is used for improving convergence for highly non‐linear material behaviour, typical for metals. Numerical experiments using the stabilization method with hierarchic shape functions for the velocity, pressure and state variable fields in viscoplastic flow and metal‐forming problems show that the stabilized finite element method is effective and efficient for non‐linear steady forming problems. Finally, the results are discussed and conclusions are inferred. Copyright © 2002 John Wiley & Sons, Ltd.
A fast boundary cloud method for exterior 2D electrostatic analysis
Authors: Shrivastava Vaishali , Aluru N. R. 
Published: November 2002

AbstractAn accelerated boundary cloud method (BCM) for boundary‐only analysis of exterior electrostatic problems is presented in this paper. The BCM uses scattered points instead of the classical boundary elements to discretize the surface of the conductors. The dense linear system of equations generated by the BCM are solved by a GMRES iterative solver combined with a singular value decomposition based rapid matrix–vector multiplication technique. The accelerated technique takes advantage of the fact that the integral equation kernel (2D Green's function in our case) is locally smooth and, therefore, can be dramatically compressed by using a singular value decomposition technique. The acceleration technique greatly speeds up the solution phase of the linear system by accelerating the computation of the dense matrix–vector product and reducing the storage required by the BCM. Copyright © 2002 John Wiley & Sons, Ltd.
Space‐time finite elements and an adaptive strategy for the coupled thermoelasticity problem
Authors: Larsson F. , Hansbo P. , Runesson K. 
Published: November 2002

AbstractA space–time finite element method for the linear thermo‐elasticity problem is outlined. By establishing the appropriate dual problem in space–time, it is possible to establish an exact a posteriori error representation formula based on residuals and the dual solution. In particular, we focus on the error generation in time. An adaptive strategy in the time‐domain is proposed, and its performance is investigated with the aid of a numerical example in 2D. In particular, the excellent precision of the error estimate, in terms of the effectivity index being close to unity, is noted. Copyright © 2002 John Wiley & Sons, Ltd.
Blurred derivatives and meshless methods
Authors: Pardo Enrique 
Published: November 2002

AbstractIn this work we first introduce and describe the concept of blurred derivatives. It is shown how they can be used both to approximate differential equations and to re‐express them in alternative ways. In particular, formulations in terms of functional integrals can be obtained using blurred derivatives and extended to non‐linear problems. Blurred derivatives are shown to provide higher flexibility for selection of approximation functions than strong and weak formulations. Some computational implementations of one‐dimensional problems are discussed and the relationship between several well‐known numerical methods is analysed. Finally a meshless numerical scheme for the Poisson equation is described in detail. Its performance is compared with linear finite elements and generalized finite differences on unstructured meshes of points. Copyright © 2002 John Wiley & Sons, Ltd.
Determination of rhizosphere 13C pulse signals in soil thin sections by laser ablation isotope ratio mass spectrometry
Authors: Bruneau Patricia M.C. , Ostle Nick , Davidson Donald A. , Grieve Ian C. , Fallick Anthony E. 
Published: November 2002

AbstractIn grassland ecosystems, soil animals act as key soil engineers and architects. The diversity of soil animals is also a regulator of ecosystem carbon flow. However, our understanding of the link between soil animals, carbon fluxes and soil physical organisation remains poor. An integrated approach based on soil micromorphology and laser ablation stable isotope ratio mass spectrometry (LA‐IRMS) was developed to provide spatially distributed data of pulse‐derived 13C tracer from roots in the soil environment. This paper describes the development and testing of a LA‐IRMS 13C/12C analytical method on soil thin sections as a means to determine the fate of root carbon derived from photosynthesis into soil. Results from this work demonstrated (1) that micro‐scale δ13C (‰) analysis could be made on targeted features located within a soil thin section and (2) that LA‐IRMS δ13C (‰) measurements made on samples obtained from 13CO2 pulse labelled plant‐soil blocks confirmed the presence of recent photosynthates in the rhizosphere (1 and 4 weeks post‐pulse). Copyright © 2002 John Wiley & Sons, Ltd.
Use of labelled nitrogen to measure gross and net rates of mineralization and microbial activity in permanent pastures following fertilizer applications at different time intervals
Authors: Hatch David J. , Sprosen Mike S. , Jarvis Steve C. , Ledgard Stewart F. 
Published: November 2002

AbstractMeasurements of some of the main internal N‐cycling processes in soil were obtained by labelling the inorganic N pool with the stable isotope of nitrogen (15N). The 15N mean pool dilution technique, combined with other field measurements, enabled gross and net N‐mineralization rates to be resolved in grassland soils, which had previously either received fertilizer N (F), or had remained unfertilized (U) for many years. The two soils were subdivided into plots that received N at different time intervals (over 3 weeks), prior to 15N measurements being made. By this novel approach, possible ‘priming’ effects over time were investigated to try to overcome some of the temporal problems of isotopic labelling of soil N (native plus fertilizer) and to identify possible changes in a range of primary N‐transformation processes. The results suggested that an overall stimulation of microbially mediated processes occurred with all N treatments, but there were inconsistencies associated with the release of N, both in the timing and the degree to which different processes responded to the application of fertilizer N. The rates of these processes were, however, within the range of previously reported data and the 15N measurements were not adversely affected by the differences in N pools created by the treatments. Thus, the mean pool dilution technique was shown to be applicable to agricultural soils, under conditions relevant to grass swards receiving fertilizer. For example, between the U and F treatments, the size of inorganic N pools increased by five‐fold and gross rates of mineralization reached 3.5 and 4.8 µg N g−1 (dry soil) d−1, respectively, but did not vary greatly with the timing of N applications. A correlation (r2 = 0.57) was found between soil respiration (which is relatively simple to measure) and net mineralization (which is more time consuming), suggesting that the former might be used as an indicator of the latter. Although this relationship was stronger in previously unfertilized soils, the similarities found with fertilized soils suggest that this approach could be used to obtain information of wider agronomic value and would, therefore, warrant further work under a range of soil conditions. Copyright © 2002 John Wiley & Sons, Ltd.