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Demand Characteristics (demand + characteristic)
Selected AbstractsIMPLICIT DEMAND CHARACTERISTICS IN RESEARCH FUNDING SOURCES,IT'S NOT JUST SOME SOURCESADDICTION, Issue 7 2007A. THOMAS MCLELLAN No abstract is available for this article. [source] Infant information processing and family history of specific language impairment: converging evidence for RAP deficits from two paradigmsDEVELOPMENTAL SCIENCE, Issue 2 2007Naseem Choudhury An infant's ability to process auditory signals presented in rapid succession (i.e. rapid auditory processing abilities [RAP]) has been shown to predict differences in language outcomes in toddlers and preschool children. Early deficits in RAP abilities may serve as a behavioral marker for language-based learning disabilities. The purpose of this study is to determine if performance on infant information processing measures designed to tap RAP and global processing skills differ as a function of family history of specific language impairment (SLI) and/or the particular demand characteristics of the paradigm used. Seventeen 6- to 9-month-old infants from families with a history of specific language impairment (FH+) and 29 control infants (FH,) participated in this study. Infants' performance on two different RAP paradigms (head-turn procedure [HT] and auditory-visual habituation/recognition memory [AVH/RM]) and on a global processing task (visual habituation/recognition memory [VH/RM]) was assessed at 6 and 9 months. Toddler language and cognitive skills were evaluated at 12 and 16 months. A number of significant group differences were seen: FH+ infants showed significantly poorer discrimination of fast rate stimuli on both RAP tasks, took longer to habituate on both habituation/recognition memory measures, and had lower novelty preference scores on the visual habituation/recognition memory task. Infants' performance on the two RAP measures provided independent but converging contributions to outcome. Thus, different mechanisms appear to underlie performance on operantly conditioned tasks as compared to habituation/recognition memory paradigms. Further, infant RAP processing abilities predicted to 12- and 16-month language scores above and beyond family history of SLI. The results of this study provide additional support for the validity of infant RAP abilities as a behavioral marker for later language outcome. Finally, this is the first study to use a battery of infant tasks to demonstrate multi-modal processing deficits in infants at risk for SLI. [source] An operational algorithm for residential cogeneration systems based on the monitored daily-basis energy demandELECTRICAL ENGINEERING IN JAPAN, Issue 2 2010Yuka Yamagishi Abstract Residential cogeneration systems with PEFC are promising as distributed power system resources with the ability to improve energy system efficiency. However, it is important to develop an efficient algorithm for operation because the energy demand at each house differs greatly from day to day. In this paper, we propose an operational algorithm and evaluate it from the viewpoint of energy conservation and economic effectiveness based on the energy demand characteristics. In the algorithm, the hot water and electricity demand on the next day are estimated based on the average of past data. The results of simulations using actually monitored energy demand data indicate that (1) the greater the electrical demand of a household, the more effective this algorithm becomes with respect to energy conservation; (2) the greater the hot water demand of a household, the more effective this algorithm becomes with respect to economic effectiveness. © 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 170(2): 37,45, 2010; Published online in Wiley InterScience (www.interscience.wiley. com). DOI 10.1002/eej.20892 [source] Burnout intervention among Dutch dentists: long-term effectsEUROPEAN JOURNAL OF ORAL SCIENCES, Issue 6 2001Hans Te Brake The aim of the present study was to determine the long-term effects of a burnout-intervention program among Dutch dentists using a longitudinal design. Using the Maslach Burnout Inventory (Dutch version: MBI-NL), at the initial measurement in 1997 a ,burnout risk group' (n=171) was identified. This group received feedback on their scores and was invited to participate in an intervention program. Of the total group, 19 dentists participated in an intervention program. After the end of the intervention program, 92 dentists (the 19 participants and a control group) responded to a post-intervention survey in 1998. These dentists were approached once more 1 yr later, and this time 78 dentists (84.8%) returned a questionnaire. While demonstrating an improvement on all subscales of the MBI-NL at the first post-test, results show that the program participants showed a relapse at the second post-test. Controls who took action on their own initiative, on the other hand, reported a beneficial effect in the long run. Finally, controls that did not take any preventive action showed little or no progress. Possible causes for these findings are discussed, including the influence of coping style, perceived control, confounding factors, demand characteristics, and the necessity of post-intervention follow-up. [source] The Industry Employability Index: Taking account of supply and demand characteristicsINTERNATIONAL LABOUR REVIEW, Issue 3 2004Andries de GRIP First page of article [source] Trade Credit Terms Offered by Small Firms: Survey Evidence and Empirical AnalysisJOURNAL OF BUSINESS FINANCE & ACCOUNTING, Issue 3-4 2002Nicholas Wilson Trade credit has been shown to be an important source of short-term finance for smaller firms but small firms are also suppliers of trade credit. There is little empirical evidence on the credit granting decisions of small firms. Previous empirical work (Petersen and Rajan, 1997; and Ng, Smith and Smith, 1999) has focused on credit granting and investment in accounts receivable in larger firms. In this paper we look at the influences on credit granting for the smallest firms, using a sample of firms with an average of 10 employees. As in previous studies we find that product and demand characteristics influence credit terms. Moreover, we find evidence that firm size affects credit extension choices directly by setting limits on the possibilities for economies of scale, but it also impacts indirectly by affecting the firm's access to finance and its bargaining strength vis-à-vis suppliers. The dominant position of larger customers in bargaining with small suppliers constrains the impact of other factors on the firm's choice of credit terms. Small firms are also under pressure to conform to industry norms, although lack of resources can be a limiting factor. Constrained firms may make use of two-part terms in an attempt to improve their cashflow. [source] Capacity expansion with lead times and autocorrelated random demandNAVAL RESEARCH LOGISTICS: AN INTERNATIONAL JOURNAL, Issue 2 2003Sarah M. Ryan Abstract The combination of uncertain demand and lead times for installing capacity creates the risk of shortage during the lead time, which may have serious consequences for a service provider. This paper analyzes a model of capacity expansion with autocorrelated random demand and a fixed lead time for adding capacity. To provide a specified level of service, a discrete time expansion timing policy uses a forecast error-adjusted minimum threshold level of excess capacity position to trigger an expansion. Under this timing policy, the expansion cost can be minimized by solving a deterministic dynamic program. We study the effects of demand characteristics and the lead time length on the capacity threshold. Autocorrelation acts similarly to randomness in hastening expansions but has a smaller impact, especially when lead times are short. However, the failure either to recognize autocorrelation or to accurately estimate its extent can cause substantial policy errors. © 2003 Wiley Periodicals, Inc. Naval Research Logistics, 2003 [source] Inventory cost impact of order processing priorities based on demand uncertaintyNAVAL RESEARCH LOGISTICS: AN INTERNATIONAL JOURNAL, Issue 4 2002Ananth. Abstract We evaluate an approach to decrease inventory costs at retail inventory locations that share a production facility. The retail locations sell the same product but differ in the variance of retail demand. Inventory policies at retail locations generate replenishment orders for the production facility. The production facility carries no finished goods inventory. Thus, production lead time for an order is the sojourn time in a single server queueing system. This lead time affects inventory costs at retail locations. We examine the impact of moving from a First Come First Served (FCFS) production rule for orders arriving at the production facility to a rule in which we provide non-preemptive priority (PR) to orders from retail locations with higher demand uncertainty. We provide three approximations for the ratio of inventory costs under PR and FCFS and use them to identify conditions under which PR decreases retail inventory costs over FCFS. We then use a Direct Approach to establish conditions when PR decreases retail inventory costs over FCFS. We extend the results to orders from locations that differ in the mean and variance of demand uncertainty. The analysis suggests that tailoring lead times to product demand characteristics may decrease system inventory costs. © 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 376,390, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/nav.10016 [source] Efficient versus Responsive Supply Chain Choice: An Empirical Examination of Influential FactorsTHE JOURNAL OF PRODUCT INNOVATION MANAGEMENT, Issue 6 2003Taylor R. Randall Contemporary strategies in operations management suggest that successful firms align supply chain assets with product demand characteristics in order to exploit the profit potential of product lines fully. However, observation suggests that supply chain assets often are longer lived than product line decisions. This suggests that alignment between supply chain assets and demand characteristics is most likely to occur at the time of initial market entry. This article examines the association between product demand characteristics and the initial investment in a supply chain at the time of market entry. We characterize supply chains as responsive or efficient. A responsive supply chain is distinguished by short production lead-times, low set-up costs, and small batch sizes that allow the responsive firm to adapt quickly to market demand, but often at a higher unit cost. An efficient supply chain is distinguished by longer production lead-times, high set-up costs, and larger batch sizes that allow the efficient firm to produce at a low unit cost, but often at the expense of market responsiveness. We hypothesize that a firm's choice of responsive supply chain will be associated with lower industry growth rates, higher contribution margins, higher product variety, and higher demand or technological uncertainty. We further hypothesize that interactions among these variables either can reinforce or can temper the main effects. We report that lower industry growth rates are associated with responsive market entry, but this effect is offset if growth occurs during periods of high variety and high demand uncertainty. We report that higher contribution margins are associated with responsive market entry and that this effect is more pronounced when occurring with periods of high variety. Finally, we report that responsive market entry also is correlated positively with higher technological demand uncertainty. These results are found using data from the North American mountain bike industry. [source] Children's memory for emergency medical treatment after one year: the impact of individual difference variables on recall and suggestibilityAPPLIED COGNITIVE PSYCHOLOGY, Issue 7 2001Elaine Burgwyn-Bailes This study explores the impact of individual difference variables on children's recall and suggestibility when they discuss a stressful personal experience. It was hypothesized that some differences in social factors, including child self concept and parenting style, would be associated with variations in the way children related their experiences. Participants were 24 3- to 7-year-old children who sustained facial lacerations requiring minor medical emergency treatment by a plastic surgeon. The children were interviewed about their surgeries on three occasions: a few days, 6 weeks and 1 year after the experience. A number of individual difference measures were administered to the children and their parents at the time of the first two interviews. The results support the hypothesis that there are individual difference variables that may help to explain some of the variability in children's recall and suggestibility. Younger children with poorer receptive language skills and children of more traditional parents recalled less total information about their surgeries after one year. Child traditionalism, achievement-motivation and social avoidance, as assessed by use of the Eder Self-View Questionnaire, made a difference in suggestibility at the initial interview, but not at subsequent memory assessments. The results are interpreted as suggesting that both the demand characteristics of the interview and the strength of the memory trace are important in understanding the effects of individual difference variables in memory performance. Implications for child testimony are discussed. Copyright © 2001 John Wiley & Sons, Ltd. [source] | ||||||||||||||||