ORCID Profile
0000-0002-9487-5187
Current Organisations
Ghent University
,
Monash University
,
Singapore Management University
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Chemical Engineering | Wastewater Treatment Processes | Mineral Processing/Beneficiation | Powder and Particle Technology | Resources Engineering and Extractive Metallurgy | Pyrometallurgy
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in Engineering | Basic Iron and Steel Products | Urban and Industrial Water Management | Industrial Energy Conservation and Efficiency | Mining and Extraction of Iron Ores |
Related Links
Publications
The ventricular residence time distribution derived from 4D flow particle tracing: a novel marker of myocardial dysfunction
Publisher: Springer Science and Business Media LLC
Date: 27-06-2018
DOI: 10.1007/S10554-018-1407-0
Abstract: 4D flow cardiac magnetic resonance (CMR) imaging allows visualisation of blood flow in the cardiac chambers and great vessels. Post processing of the flow data allows determination of the residence time distribution (RTD), a novel means of assessing ventricular function, potentially providing additional information beyond ejection fraction. We evaluated the RTD measurement of efficiency of left and right ventricular (LV and RV) blood flow. 16 volunteers and 16 patients with systolic dysfunction (LVEF < 50%) underwent CMR studies including 4D flow. The RTDs were created computationally by seeding virtual 'particles' at the inlet plane in customised post-processing software, moving these particles with the measured blood velocity, recording and counting how many exited per unit of time. The efficiency of ventricular flow was determined from the RTDs based on the time constant (RTDc = - 1/B) of the exponential decay. The RTDc was compared to ejection fraction, T1 mapping and global longitudinal strain (GLS). There was a significant difference between groups in LV RTDc (healthy volunteers 1.2 ± 0.13 vs systolic dysfunction 2.2 ± 0.80, p < 0.001, C-statistic = 1.0) and RV RTDc (1.5 ± 0.15 vs 2.0 ± 0.57, p = 0.013, C-statistic = 0.799). The LV RTDc correlated significantly with LVEF (R = - 0.84, P < 0.001) and the RV RTDc had significant correlation with RVEF (R = - 0.402, p = 0.008). The correlation between LV RTDc and LVEF was similar to GLS and LVEF (0.926, p < 0.001). The ventricular residence time correlates with ejection fraction and can distinguish normal from abnormal systolic function. Further assessment of this method of assessment of chamber function is warranted.
Distinctive features of nonverbal behavior and mimicry in application interviews through data analysis and machine learning
Publisher: Elsevier BV
Date: 09-2022
Creating Alternate In‐Basket Forms Through Cloning: Some preliminary results
Publisher: Wiley
Date: 31-10-2007
Recent developments in techniques and methodologies for improving thickener performance
Publisher: Elsevier BV
Date: 12-2000
Confirmatory factor analysis and invariance of an organizational citizenship behaviour measure across samples in a Dutch-speaking context
Publisher: Wiley
Date: 09-2004
Reflection as a strategy to enhance task performance after feedback
Publisher: Elsevier BV
Date: 09-2009
Lagrangian Transport and Chaotic Advection in Three-Dimensional Laminar Flows
Publisher: ASME International
Date: 28-04-2021
DOI: 10.1115/1.4050701
Abstract: Transport and mixing of scalar quantities in fluid flows is ubiquitous in industry and Nature. While the more familiar turbulent flows promote efficient transport and mixing by their inherent spatio-temporal disorder, laminar flows lack such a natural mixing mechanism and efficient transport is far more challenging. However, laminar flow is essential to many problems, and insight into its transport characteristics of great importance. Laminar transport, arguably, is best described by the Lagrangian fluid motion (“advection”) and the geometry, topology, and coherence of fluid trajectories. Efficient laminar transport being equivalent to “chaotic advection” is a key finding of this approach. The Lagrangian framework enables systematic analysis and design of laminar flows. However, the gap between scientific insights into Lagrangian transport and technological applications is formidable primarily for two reasons. First, many studies concern two-dimensional (2D) flows, yet the real world is three-dimensional (3D). Second, Lagrangian transport is typically investigated for idealized flows, yet practical relevance requires studies on realistic 3D flows. The present review aims to stimulate further development and utilization of know-how on 3D Lagrangian transport and its dissemination to practice. To this end, 3D practical flows are categorized into canonical problems. First, to expose the ersity of Lagrangian transport and create awareness of its broad relevance. Second, to enable knowledge transfer both within and between scientific disciplines. Third, to reconcile practical flows with fundamentals on Lagrangian transport and chaotic advection. This may be a first incentive to structurally integrate the “Lagrangian mindset” into the analysis and design of 3D practical flows.
Impact of discontinuous deformation upon the rate of chaotic mixing
Publisher: American Physical Society (APS)
Date: 21-02-2017
The Move to Business Schools: How Is Industrial–Organizational Psychology Holding Up in Europe?
Publisher: Cambridge University Press (CUP)
Date: 09-2014
DOI: 10.1111/IOPS.12164
An Examination of Strategies for Encouraging Feedback Interest After Career Assessment
Publisher: SAGE Publications
Date: 03-2007
Abstract: This study examines how feedback interest after career assessment can be influenced by changing in iduals’ beliefs about the importance and modifiability of the various performance dimensions. In an experiment, 82 master students completed a computerized assessment tool developed for assessing managerial potential. Results showed that participants in the experimental condition were more interested in feedback about important dimensions as opposed to unimportant dimensions and were more interested in feedback about nonmodifiable dimensions as opposed to modifiable dimensions. These findings might assist career counselors and organizations in designing strategies that direct feedback interest toward performance dimensions that are most important for their clients’ career or that are most valued in their organization.
Flow regime analysis of non-Newtonian duct flows
Publisher: AIP Publishing
Date: 2006
DOI: 10.1063/1.2163913
Abstract: Reoriented duct flows of generalized Newtonian fluids are an idealization of non-Newtonian fluid flow in industrial in-line mixers. Based on scaling analysis and computation we find that non-Newtonian duct flows have several limit behaviors, in the sense that such flows can become (nearly) independent of one or more of the rheological and dynamical control parameters, simplifying the general flow and mixing problem. These limit flows give several levels of modeling complexity to the full problem of non-Newtonian duct flow. We describe the sets of simplified flow models and their corresponding regions of validity. This flow-model decomposition captures the essential rheological and dynamical characteristics of the reoriented duct flows and enables a more efficient and systematic study and design of flow and mixing of non-Newtonian fluids in ducts. Key aspects of the flow-model decomposition are demonstrated via a specific, but representative, duct flow.
Evidence for a common genetic aetiology in high-risk families with multiple haematological malignancy subtypes
Publisher: Wiley
Date: 08-2010
DOI: 10.1111/J.1365-2141.2010.08267.X
Abstract: A family history of a haematological malignancy (HM) is known to be a risk factor for HMs. However, collections of large families with multiple cases of varied disease types are relatively rare. We describe a collection of 12 families with dense aggregations of multiple HM subtypes. Cases were ascertained from a population based study conducted between 1972 and 1980 in Tasmania, Australia. Diagnoses were confirmed through review and re-examination of stored tissue, pathology reports, Tasmanian Cancer Registry and flow cytometry records. Family trees were generated and kinship coefficients were calculated for all pairs of affected in iduals. 120 cases were found in these families. Cases diagnosed with chronic lymphocytic leukaemia (CLL) demonstrated the most significantly increased aggregation (P 53 years), did not aggregate together in families with disease that presented at an earlier age (<20 years) (P = 0.009).
The feedback loop in impinging two-dimensional high-subsonic and supersonic jets
Publisher: Elsevier BV
Date: 02-1996
Localized shear generates three-dimensional transport
Publisher: AIP Publishing
Date: 04-2017
DOI: 10.1063/1.4979666
Abstract: Understanding the mechanisms that control three-dimensional (3D) fluid transport is central to many processes, including mixing, chemical reaction, and biological activity. Here a novel mechanism for 3D transport is uncovered where fluid particles are kicked between streamlines near a localized shear, which occurs in many flows and materials. This results in 3D transport similar to Resonance Induced Dispersion (RID) however, this new mechanism is more rapid and mutually incompatible with RID. We explore its governing impact with both an abstract 2-action flow and a model fluid flow. We show that transitions from one-dimensional (1D) to two-dimensional (2D) and 2D to 3D transport occur based on the relative magnitudes of streamline jumps in two transverse directions.
The Mediating Role of Feedback Acceptance in the Relationship between Feedback and Attitudinal and Performance Outcomes
Publisher: Wiley
Date: 12-11-2009
Keeping up with the Joneses: A field study of the relationships among upward, lateral, and downward comparisons and pay level satisfaction.
Publisher: American Psychological Association (APA)
Date: 2008
DOI: 10.1037/0021-9010.93.3.665
Abstract: The authors examined the relationship between the direction of pay comparisons and pay level satisfaction. They hypothesized that upward pay comparisons would significantly predict pay level satisfaction, even when controlling for other comparisons. Results reported in 2 s les (U.S. s le, N = 295 Belgian s le, N = 67) generally supported this hypothesis. Analyses showed that in iduals who were paid much less than their upward pay comparison were dissatisfied with their pay level. The highest levels of pay level satisfaction were observed when actual pay was congruent with the upward comparison pay level. There was also evidence that in iduals who were paid much more than their upward pay comparison were dissatisfied with their pay level. However, the negative effects of overreward on pay satisfaction were considerably smaller than were those of underreward.
Measurement Invariance of the Pay Satisfaction Questionnaire Across Three Countries
Publisher: SAGE Publications
Date: 06-06-2007
Abstract: In recent years, pay satisfaction has been increasingly studied in an international context, prompting the importance of examining whether the Pay Satisfaction Questionnaire (PSQ) is invariant across countries other than the United States. This study investigated the measurement invariance across three countries, namely, the United States (N = 321), Belgium (N = 301), and Cyprus (N = 132). Results showed that the measurement structure of the PSQ was invariant across these different countries because there was no departure from measurement invariance in terms of factor form, factor pattern coefficients, factor variances, and factor covariances. These results show promise for the equivalence of PSQ ratings across different countries. Future research is needed to test the equivalence further across other countries and s les.
Nonmixing vortex cores in wavy Taylor vortex flow
Publisher: AIP Publishing
Date: 06-2008
DOI: 10.1063/1.2937726
Abstract: When the symmetry of axisymmetric Taylor vortex flow is broken, time-periodic wavy vortex flow (WVF) appears and quite quickly becomes globally chaotic (in the Lagrangian sense) with increasing Reynolds number. Previously published simulations of WVF suggest that beyond a certain Re, nonmixing vortex cores reappear in the flow and grow in size with further increases in Re. This reappearance occurs well into the inertia-dominated flow regime and coincides with a decrease in axial fluid dispersion and an increase in flow symmetry as measured by certain Eulerian symmetry measures. In this brief paper, we present experimental dye-reaction visualization results from two WVF wave states in the region where vortex cores are predicted numerically. The experimental results show unambiguous visual evidence for the existence of vortex cores and provide visual agreement with the numerical results. They are significant in that experimental evidence for these structures in WVF has not been reported before. The results also suggest that vortex-to-vortex transport occurs via sheetlike structures that are pulled from one vortex to another and become wrapped around the vortex cores before being stretched to the point at which molecular diffusion dominates.
Topological mixing study of non-Newtonian duct flows
Publisher: AIP Publishing
Date: 10-2006
DOI: 10.1063/1.2359698
Abstract: Tracer advection of non-Newtonian fluids in reoriented duct flows is investigated in terms of coherent structures in the web of tracer paths that determine transport properties geometrically. Reoriented duct flows are an idealization of in-line mixers, encompassing many micro and industrial continuous mixers. The topology of the tracer dynamics of reoriented duct flows is Hamiltonian. As the stretching per reorientation increases from zero, we show that the qualitative route from the integrable state to global chaos and good mixing does not depend on fluid rheology. This is due to a universal symmetry of reoriented duct flows, which we derive, controlling the topology of the tracer web. Symmetry determines where in parameter space global chaos first occurs, while increasing non-Newtonian effects delays the quantitative value of onset. Theory is demonstrated computationally for a representative duct flow, the rotated arc mixing flow.
A Within-Person Perspective on Feedback Seeking about Task Performance
Publisher: Ubiquity Press, Ltd.
Date: 12-2006
DOI: 10.5334/PB-46-4-283
How Are We Doing After 30 Years? A Meta-Analytic Review of the Antecedents and Outcomes of Feedback-Seeking Behavior
Publisher: SAGE Publications
Date: 16-05-2013
Abstract: This study provides meta-analytic estimates of the antecedents and consequences of feedback-seeking behavior (FSB). Clear support was found for the guiding cost/benefit framework in the feedback-seeking domain. Organizational tenure, job tenure, and age were negatively related to FSB. Learning and performance goal orientation, external feedback propensity, frequent positive feedback, high self-esteem, a transformational leadership style, and a high-quality relationship were positively associated with FSB. Challenging some of the dominant views in the feedback-seeking domain, the relationship between uncertainty and FSB was negative and the relationship between FSB and performance was small. Finally, inquiry and monitoring are not interchangeable feedback-seeking tactics. So FSB is best represented as an aggregate model instead of a latent model. In the discussion, gaps in the current FSB knowledge are identified and a research agenda for the future is put forward. Future research may benefit from (a) a systematic and integrative effort examining antecedents of both feedback-seeking strategies on the basis of a self-motives framework, (b) adopting a process perspective of feedback-seeking interactions, and (c) taking the iterative nature of feedback into account.
An experimental and theoretical study of the mixing characteristics of a periodically reoriented irrotational flow
Publisher: The Royal Society
Date: 13-05-2010
Abstract: The minimum-energy method to generate chaotic advection should be to use an irrotational flow. However, irrotational flows have no saddle connections to perturb in order to generate chaotic orbits. To the early work of Jones & Aref (Jones & Aref 1988 Phys. Fluids 31 , 469–485 ( doi:10.1063/1.866828 )) on potential flow chaos, we add periodic reorientation to generate chaotic advection with irrotational experimental flows. Our experimental irrotational flow is a dipole potential flow in a disc-shaped Hele-Shaw cell called the rotated potential mixing flow it leads to chaotic advection and transport in the disc. We derive an analytical map for the flow. This is a partially open flow, in which parts of the flow remain in the cell forever, and parts of it pass through with residence-time and exit-time distributions that have self-similar features in the control parameter space of the stirring. The theory compares well with the experiment.
Responding to Personality Tests in a Selection Context: The Role of the Ability to Identify Criteria and the Ideal-Employee Factor
Publisher: Informa UK Limited
Date: 09-2012
Does career timing of challenging job assignments influence the relationship with in-role job performance?
Publisher: Elsevier BV
Date: 08-2013
Recruiting/Hiring of Older Workers
Publisher: Oxford University Press
Date: 16-03-2012
Response Rates in Organizational Science, 1995–2008: A Meta-analytic Review and Guidelines for Survey Researchers
Publisher: Springer Science and Business Media LLC
Date: 09-02-2010
Global parametric solutions of scalar transport
Publisher: Elsevier BV
Date: 03-2008
Situational judgement tests for selection: Traditional vs construct‐driven approaches
Publisher: Wiley
Date: 23-12-2023
DOI: 10.1111/MEDU.14011
Abstract: Historically, situational judgement tests (SJTs) have been widely used for personnel selection. Their use in medical selection in Europe is growing, with plans for further expansion into North America and Australasia, in an attempt to measure and select on 'non-academic' personal attributes. However, there is a lack of clarity regarding what such tests actually measure and how they should be designed, scored and implemented within the medical and health education selection process. In particular, the theoretical basis from which such tests are developed will determine the scoring options available, influencing their psychometric properties and, ultimately, their validity. The aim of this article is to create an awareness of the previous theory and practice that has informed SJT development. We describe the emerging interest in the use of the SJT format to measure specific constructs (eg 'resilience', 'dependability', etc.), drawing on the tradition of 'in idual differences' psychology. We compare and contrast this newer 'construct-driven' method with the traditional, pragmatic approach to SJT creation, often employed by organisational psychologists. Making reference to measurement theory, we highlight how the anticipated psychometric properties of traditional vs construct-driven SJTs are likely to differ. Compared to traditional SJTs, construct-driven SJTs have a strong theoretical basis, are uni- rather than multidimensional, and may behave more like personality self-report instruments. Emerging evidence also suggests that construct-driven SJTs have comparable predictive validity for workplace performance, although they may be more prone to 'faking' effects. It is possible that construct-driven approaches prove more appropriate at early stages of medical selection, where candidates have little or no health care work experience. Conversely, traditional SJTs may be more suitable for specialty recruitment, where a range of hypothetical workplace scenarios can be s led in assessments.
Scalar dispersion in a periodically reoriented potential flow: Acceleration via Lagrangian chaos
Publisher: American Physical Society (APS)
Date: 29-04-2010
Measuring atrial stasis during sinus rhythm in patients with paroxysmal atrial fibrillation using 4 Dimensional flow imaging
Publisher: Elsevier BV
Date: 09-2020
Complete parametric scalar dispersion
Publisher: SPIE
Date: 21-12-2008
DOI: 10.1117/12.769348
Global organization of three-dimensional, volume-preserving flows: Constraints, degenerate points, and Lagrangian structure
Publisher: AIP Publishing
Date: 03-2020
DOI: 10.1063/1.5135333
Abstract: Global organization of three-dimensional (3D) Lagrangian chaotic transport is difficult to infer without extensive computation. For 3D time-periodic flows with one invariant, we show how constraints on deformation that arise from volume-preservation and periodic lines result in resonant degenerate points that periodically have zero net deformation. These points organize all Lagrangian transport in such flows through coordination of lower-order and higher-order periodic lines and prefigure unique transport structures that arise after perturbation and breaking of the invariant. Degenerate points of periodic lines and the extended 3D structures associated with them are easily identified through the trace of the deformation tensor calculated along periodic lines. These results reveal the importance of degenerate points in understanding transport in one-invariant fluid flows.
Temperature and strain rate effects in cold spray investigated by smoothed particle hydrodynamics
Publisher: Elsevier BV
Date: 09-2014
Composing chaos: An experimental and numerical study of an open duct mixing flow
Publisher: Wiley
Date: 19-09-2006
DOI: 10.1002/AIC.10640
Values assessment for personnel selection: comparing job applicants to non-applicants
Publisher: Informa UK Limited
Date: 07-12-2021
Values Assessment for Personnel Selection: Comparing Job Applicants to Non-Applicants
Publisher: Center for Open Science
Date: 07-12-2021
Abstract: Some scholars suggest that organizations could improve their hiring decisions by measuring the personal values of job applicants, arguing that values provide insights into applicants’ cultural fit, retention prospects, and performance outcomes. However, others have expressed concerns about response distortion and faking. The current study provides the first large-scale investigation of the effect of the job applicant context on the psychometric structure and scale means of a self-reported values measure. Participants comprised 7,884 job applicants (41% male age M = 43.32, SD = 10.76) and a country-, age-, and gender-matched comparison s le of 1,806 non-applicants (41% male age M = 44.72, SD = 10.97), along with a small repeated-measures, cross-context s le. Respondents completed the 57-item Portrait Values Questionnaire (PVQ) measuring Schwartz’ universal personal values. Compared to matched non-applicants, applicants reported valuing power and self-direction considerably less, and conformity and universalism considerably more. Applicants also reported valuing security, tradition, and benevolence more than non-applicants, and reported valuing stimulation, hedonism, and achievement less than non-applicants. Despite applicants appearing to embellish the degree to which their values aligned with being responsible and considerate workers, invariance testing suggested that the under- lying structure of values assessment is largely preserved in job applicant contexts.
The separate roles of shear rate and mixing on gibbsite precipitation
Publisher: Elsevier BV
Date: 04-2001
Mixing of discontinuously deforming media
Publisher: AIP Publishing
Date: 02-2016
DOI: 10.1063/1.4941851
Abstract: Mixing of materials is fundamental to many natural phenomena and engineering applications. The presence of discontinuous deformations—such as shear banding or wall slip—creates new mechanisms for mixing and transport beyond those predicted by classical dynamical systems theory. Here, we show how a novel mixing mechanism combining stretching with cutting and shuffling yields exponential mixing rates, quantified by a positive Lyapunov exponent, an impossibility for systems with cutting and shuffling alone or bounded systems with stretching alone, and demonstrate it in a fluid flow. While dynamical systems theory provides a framework for understanding mixing in smoothly deforming media, a theory of discontinuous mixing is yet to be fully developed. New methods are needed to systematize, explain, and extrapolate measurements on systems with discontinuous deformations. Here, we investigate “webs” of Lagrangian discontinuities and show that they provide a template for the overall transport dynamics. Considering slip deformations as the asymptotic limit of increasingly localised smooth shear, we also demonstrate exactly how some of the new structures introduced by discontinuous deformations are analogous to structures in smoothly deforming systems.
Control mechanisms for the global structure of scalar dispersion in chaotic flows
Publisher: American Physical Society (APS)
Date: 14-08-2014
Lagrangian topology of a periodically reoriented potential flow: Symmetry, optimization, and mixing
Publisher: American Physical Society (APS)
Date: 21-09-2009
Influence of volume and aspect ratio of liquid bridges on capillary breakup rheometry
Publisher: AIP Publishing
Date: 03-2022
DOI: 10.1063/5.0084878
Abstract: Capillary thinning of liquid bridges is routinely used for extensional rheology of Newtonian and complex fluids. Although it is expected that the volume and aspect ratio of a liquid bridge significantly influence its dynamics, the role played by these parameters in rheological characterization has not been previously studied. We perform numerical simulations of Newtonian as well as viscoelastic liquid bridges with the one-dimensional slender-filament approximation of Eggers and Dupont [“Drop formation in a one-dimensional approximation of the Navier–Stokes equation,” J. Fluid Mech. 262, 205–221 (1994)] and Ardekani et al. [“Dynamics of bead formation, filament thinning and breakup in weakly viscoelastic jets,” J. Fluid Mech. 665, 46–56 (2010)]. S le volume and bridge aspect ratio control two phenomena that can adversely impact rheological characterization: the tendency to form satellite drops at the necking plane and the slowing down of capillary thinning due to the proximity (in parameter space) of the liquid-bridge stability boundary. The optimal range of these parameter values to avoid drop formation and slowdown is discussed.
Certainty as a moderator of feedback reactions? A test of the strength of the self‐verification motive
Publisher: Wiley
Date: 12-2006
Differences between multimedia and text-based assessments of emotion management: An exploration with the multimedia emotion management assessment (MEMA)
Publisher: Informa UK Limited
Date: 12-08-2016
DOI: 10.1080/02699931.2015.1061482
Abstract: People process emotional information using visual, vocal, and verbal cues. However, emotion management is typically assessed with text based rather than multimedia stimuli. This study (N = 427) presents the new multimedia emotion management assessment (MEMA) and compares it to the text-based assessment of emotion management used in the MSCEIT. The text-based and multimedia assessment showed similar levels of cognitive saturation and similar prediction of relevant criteria. Results demonstrate that the MEMA scores have equivalent evidence of validity to the text-based MSCEIT test scores, demonstrating that multimedia assessment of emotion management is viable. Furthermore, our results inform the debate as to whether cognitive saturation in emotional intelligence (EI) measures represents "noise" or "substance". We find that cognitive ability associations with EI represent substantive variance rather than construct-irrelevant shared variance due to reading comprehension ability required for text-based items.
A Closer Look at the Relationship between Justice Perceptions and Feedback Reactions: The role of the quality of the relationship with the supervisor
Publisher: Ubiquity Press, Ltd.
Date: 06-2008
Creating analytically divergence-free velocity fields from grid-based data
Publisher: Elsevier BV
Date: 10-2016
Aggregate densification in the thickening of flocculated suspensions in an un-networked bed
Publisher: Elsevier BV
Date: 2015
Systematic Reflection
Publisher: SAGE Publications
Date: 02-2014
Abstract: Drawing on a growing stream of empirical findings that runs across different psychological domains, we demonstrated that systematic reflection stands out as a prominent tool for learning from experience. For decades, failed experiences have been considered the most powerful learning sources. Despite the theoretical and practical relevance, few researchers have investigated whether people can also learn from their successes. We showed that through systematic reflection, people can learn from both their successes and their failures. Studies have further shown that the effectiveness of systematic reflection depends on situational (e.g., reflection focus) and person-based (e.g., conscientiousness) factors. Given today’s unrelenting pace and the abundance of activities in which people are involved, future researchers may want to investigate how to effectively integrate systematic reflection within the busy daily environment of the learner.
Organizational career growth and subsequent voice behavior: The role of affective commitment and gender
Publisher: Elsevier BV
Date: 06-2014
Automatic Scoring of Speeded Interpersonal Assessment Center Exercises Via Machine Learning: Initial Psychometric Evidence and Practical Guidelines
Publisher: Center for Open Science
Date: 21-01-2023
Abstract: Assessment center (AC) exercises such as role-plays have established themselves as valuable approaches for obtaining insights into interpersonal behavior, but they are often considered the “Rolls Royce” of personnel assessment due to their high costs. The observation and rating process comprises a substantial part of these costs. In an exploratory case study, we capitalize on recent advances in natural language processing (NLP) by developing NLP-based machine learning (ML) models to investigate the possibility of automatically scoring AC exercises. First, we compared the convergent-related validity and contamination with word count of ML scores based on models that used different NLP methods to operationalize verbal behavior. Second, for the model that maximized convergence while minimizing contamination with word count (i.e., a model that used both n-grams and Universal Sentence Encoder embeddings as predictors), we investigated the criterion-related validity of its scores. Third, we examined how the interrater reliability of the AC role-play scores affects ML model convergence. To do so, we applied seven NLP methods to 96 assessees’ transcriptions and trained 10 sets of ML models across 18 speeded AC role-plays to automatically score assessee performance. Results suggest that ML scores recovered most of the original variance in the overall assessment ratings, and replacing one or more human assessors with ML scores maintained criterion-related validity. Additionally, ML models seemed to exhibit higher convergence when assessors consistently detected and utilized observable behaviors to make ratings (i.e., when interrater reliability was higher). Finally, we provide a step-by-step guide for practitioners seeking to implement ML scoring in ACs.
Organizational Identity and Employer Image: Towards a Unifying Framework*
Publisher: Wiley
Date: 28-02-2007
The Long‐Term Impact of the Feedback Environment on Job Satisfaction: A Field Study in a Belgian Context
Publisher: Wiley
Date: 07-02-2007
A self‐motives perspective on feedback‐seeking behavior: Linking organizational behavior and social psychology research
Publisher: Wiley
Date: 21-08-2007
Characterisation of Oscillations in Multi-phase Unbaffled Mixing Vessels
Publisher: Elsevier BV
Date: 09-2023
The Relationship Between Uncertainty and Desire for Feedback: A Test of Competing Hypotheses1
Publisher: Wiley
Date: 23-04-2007
Bifurcations and degenerate periodic points in a three dimensional chaotic fluid flow
Publisher: AIP Publishing
Date: 05-2016
DOI: 10.1063/1.4950763
Abstract: Analysis of the periodic points of a conservative periodic dynamical system uncovers the basic kinematic structure of the transport dynamics and identifies regions of local stability or chaos. While elliptic and hyperbolic points typically govern such behaviour in 3D systems, degenerate (parabolic) points also play an important role. These points represent a bifurcation in local stability and Lagrangian topology. In this study, we consider the ramifications of the two types of degenerate periodic points that occur in a model 3D fluid flow. (1) Period-tripling bifurcations occur when the local rotation angle associated with elliptic points is reversed, creating a reversal in the orientation of associated Lagrangian structures. Even though a single unstable point is created, the bifurcation in local stability has a large influence on local transport and the global arrangement of manifolds as the unstable degenerate point has three stable and three unstable directions, similar to hyperbolic points, and occurs at the intersection of three hyperbolic periodic lines. The presence of period-tripling bifurcation points indicates regions of both chaos and confinement, with the extent of each depending on the nature of the associated manifold intersections. (2) The second type of bifurcation occurs when periodic lines become tangent to local or global invariant surfaces. This bifurcation creates both saddle–centre bifurcations which can create both chaotic and stable regions, and period-doubling bifurcations which are a common route to chaos in 2D systems. We provide conditions for the occurrence of these tangent bifurcations in 3D conservative systems, as well as constraints on the possible types of tangent bifurcation that can occur based on topological considerations.
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