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Feedback Strategies (feedback + strategy)

Distribution by Scientific Domains
Business, Economics, Finance and Accounting27%
Engineering18%

Selected Abstracts

Managers' and Subordinates' Evaluations of Feedback Strategies: The Critical Contribution of Voice,

JOURNAL OF APPLIED SOCIAL PSYCHOLOGY, Issue 4 2008
Alf Lizzio
This study investigated 87 managers' and 91 subordinates' evaluations of a range of strategies for delivering performance feedback in the workplace. The managers and subordinates rated 8 written vignettes describing different feedback strategies on a number of variables (perceived effectiveness, perceived risk, level of enactment demand, and congruence of strategy for managers). Feedback strategies that used an invitation for the subordinate to reply to the negative feedback were evaluated as more effective and managerially congruent, and less risky than were the other strategies. However, strategies requiring bidirectional communication (e.g., invitations to reply), as opposed to unidirectional communication (e.g., praise), were generally perceived as more demanding to enact. [source]

Use of aiding and feedback in improving visual search performance for an inspection task

HUMAN FACTORS AND ERGONOMICS IN MANUFACTURING & SERVICE INDUSTRIES, Issue 2 2003
Samir Chabukswar
The objective of this research is to evaluate the effect of providing online feedback, process, and process plus performance on visual search performance for a printed circuit board inspection task. A training aid was developed that provided process and process plus performance feedback and enabled a comparison between the two feedback strategies. Two search strategies,search by area and search by component,were adopted to complete the task, and their sensitivity to the type of feedback and search performance was evaluated. Providing process plus performance feedback helped in improving speed and accuracy, whereas area search strategy proved beneficial in improving search speed for both feedback strategies. Graphical feedback on the component location helped in locating more component defects than area defects. © 2003 Wiley Periodicals, Inc. Hum Factors Man 13: 115,136, 2003. [source]

Managers' and Subordinates' Evaluations of Feedback Strategies: The Critical Contribution of Voice,

JOURNAL OF APPLIED SOCIAL PSYCHOLOGY, Issue 4 2008
Alf Lizzio
This study investigated 87 managers' and 91 subordinates' evaluations of a range of strategies for delivering performance feedback in the workplace. The managers and subordinates rated 8 written vignettes describing different feedback strategies on a number of variables (perceived effectiveness, perceived risk, level of enactment demand, and congruence of strategy for managers). Feedback strategies that used an invitation for the subordinate to reply to the negative feedback were evaluated as more effective and managerially congruent, and less risky than were the other strategies. However, strategies requiring bidirectional communication (e.g., invitations to reply), as opposed to unidirectional communication (e.g., praise), were generally perceived as more demanding to enact. [source]

Feedback control in flashing ratchets,

ANNALEN DER PHYSIK, Issue 2-3 2008
E.M. Craig
Abstract A flashing ratchet uses a time-dependent, spatially periodic, asymmetric potential to rectify thermal motion of Brownian particles. Here we review approaches to improve the particle flux in this type of Brownian motor by feedback strategies that switch the potential based on the instantaneous particle distribution. We review strategies that are based on the force experienced by the particles, and introduce a new feedback strategy that is based on the expected displacement that can be achieved. Langevin dynamics simulations show that this maximum net displacement strategy performs better than force-based strategies in the limit of very small particle numbers and not too high temperatures. We also review the effects of time delay and noisy channels on feedback control, and perform a feasibility analysis of an experimental system that can realize feedback control using a computer-controlled, scanning-line optical trap and suspended microspheres. [source]

THE CLOSED-LOOP EFFECTS OF MARKET INTEGRATION IN A DYNAMIC DUOPOLY

AUSTRALIAN ECONOMIC PAPERS, Issue 1 2010
KENJI FUJIWARA
This paper develops a dynamic game model of reciprocal dumping to reconsider welfare effects of market integration, i.e. reductions in transport costs. We show that welfare under trade is unambiguously less than welfare under autarky for any level of transport costs, which is impossible in static models where trade is profitable if the transport cost is low enough. This is because the negative effect through closed-loop property of feedback strategies dominates the positive effects. [source]

The closed-loop effect and the profitability of horizontal mergers

CANADIAN JOURNAL OF ECONOMICS, Issue 3 2003
Hassan Benchekroun
It is shown that, when firms use open-loop strategies, a merger is profitable only if the share of the market that merges is significant enough. In the case where firms use closed-loop strategies we provide a method to conduct analytically the study of the profitability of horizontal mergers. We first prove the existence of an equilibrium of the game when a subset of firms merges. When firms use feedback strategies, mergers are profitable even when the share of the market that merges is arbitrarily small. JEL Classification:D4, L13 L'effet de la boucle fermée et la profitabilité des fusions horizontales., Ce mémoire étudie la profitabilité des fusions horizontales dans un contexte de concurrence dynamique où les prix sont visqueux. On montre que, quand les entreprises utilisent des stratégies de boucle ouverte, une fusion est profitable seulement si la part du marché qui se fusionne est assez significative. Dans le cas où les entreprises utilisent des stratégies de boucle fermée, on propose une méthode pour étudier analytiquement la profitabilité des fusions horizontales. On prouve d'abord l'existence d'un équilibre du jeu quand un sous-ensemble d'entreprises se fusionne. Quand les entreprises utilisent des stratégies de rétroaction, les fusions sont profitables même quand la part de marché qui se fusionne est arbitrairement petite. [source]

Fuzzy scheduling strategy for generalized switched server systems and its robustness over system heterogeneity

INTERNATIONAL JOURNAL OF INTELLIGENT SYSTEMS, Issue 3 2009
Xingxuan Wang
Generalized switched server system, a discretely controlled continuous-time system, in which N tanks are used to represent N parallel entities, respectively, can be employed to address a class of load-balancing problems. A tank-pair model is a system that consists of two tanks and a single input single output controller, which regulates the inflows of the two tanks to acquire the two uniform levels under the specified inflow constraints. According to a quantized observation of the N tank levels, some discrete events are generated, and based on certain event feedback strategy, switching the location of the tank-pair can control all the N tanks in a time-sharing manner to acquire the N levels uniformity. Different from some existing scheduling strategies, this study proposes a fuzzy scheduling strategy (FSS) for such generalized switched server systems. Special measures are taken to reduce the N -inputs two-outputs fuzzy inference to a two-inputs one-output one, which greatly facilitates fuzzy scheduler design. Simulation results show that the proposed FSS strategy outperforms over the three existing scheduling strategies as a whole, and they also show that the proposed FSS strategy demonstrates high robustness over system heterogeneity. © 2009 Wiley Periodicals, Inc. [source]

A hybrid feedback for a benchmark problem of idle speed control

INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL, Issue 5 2010
A. Balluchi
Abstract The ever increasing demands on passengers' comfort, safety, emissions and fuel consumption imposed by car manufacturers and regulations call for advanced techniques and the use of cycle-accurate models in automotive control. In this paper, we focus on such approach to the idle speed control. It is natural to resort to hybrid methodologies, because of the rich combination of time and event-based behaviors exhibited by a controlled engine. A hybrid benchmark problem is considered and addressed first by analyzing the equilibria of the system and then testing a simple hybrid feedback strategy. Copyright © 2009 John Wiley & Sons, Ltd. [source]

Feedback control in flashing ratchets,

ANNALEN DER PHYSIK, Issue 2-3 2008
E.M. Craig
Abstract A flashing ratchet uses a time-dependent, spatially periodic, asymmetric potential to rectify thermal motion of Brownian particles. Here we review approaches to improve the particle flux in this type of Brownian motor by feedback strategies that switch the potential based on the instantaneous particle distribution. We review strategies that are based on the force experienced by the particles, and introduce a new feedback strategy that is based on the expected displacement that can be achieved. Langevin dynamics simulations show that this maximum net displacement strategy performs better than force-based strategies in the limit of very small particle numbers and not too high temperatures. We also review the effects of time delay and noisy channels on feedback control, and perform a feasibility analysis of an experimental system that can realize feedback control using a computer-controlled, scanning-line optical trap and suspended microspheres. [source]

WHEN ARE VOLUNTARY EXPORT RESTRAINTS VOLUNTARY?

AUSTRALIAN ECONOMIC PAPERS, Issue 2 2010
A DIFFERENTIAL GAME APPROACH
We revisit voluntariness of voluntary export restraints (VERs) in a differential game model of duopoly with sticky prices. We show that a VER set at the free trade level has no effect on equilibrium under open-loop strategies while the same policy results in a smaller profit for the exporting firm, i.e. it is involuntary under a non-linear feedback strategy. Moreover, we prove an extended proposition of Dockner and Haug (1991) on voluntariness of VERs under a linear feedback strategy. [source]